CN101232306B - Crosstalk test approach of second generation ultra-high speed numeral user loop switch-in user - Google Patents
Crosstalk test approach of second generation ultra-high speed numeral user loop switch-in user Download PDFInfo
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Abstract
The invention discloses a crosstalk testing method for a second-generation very-high-speed figure subscriber loop to access to a user. The crosstalk testing method comprises a mutual crosstalk test between VDSL2 access users and other access users, and a self crosstalk test of the VDSL2 access users. The invention respectively tests the mutual crosstalk state between the VDSL2 access users and other access users and the self crosstalk state between the VDSL2 access users, under the conditions that the wire length is in short distance, the wire length is in long distance, the self inherent characteristic of the VDSL2 is not opened, and the self inherent characteristic of the VDSL2 is opened. The invention can test the self crosstalk state of the VDSL2 and the mutual crosstalk state of the other various access users without special testing instruments, can better simulate practical application scene, and can achieve the testing effect on the basis of cost conservation.
Description
Technical field
The present invention relates to the measuring technology in broadband access field; Relate in particular to a kind of VDSL2 (Second Generation Very-high-bit-rate Digital Subscriber loop, second generation very-high-bit-rate digital subscriber loop) access user's crosstalk test approach.
Background technology
In recent years; Along with the fast development of broadband internet technology and broadband services, the broadband user is progressively from the single application of high speed Internet access, to VoIP (Voice over IP; Voice technology based on Internet Protocol), IPTV (Internet Protocol Television; TV tech based on Internet Protocol), integrated application such as face-to-face communication development, therefore, higher requirement will be proposed to access bandwidth.In the prior art by the widely used ADSL of telecom operators (Asymmetric Digital Subscriber Line; ADSL)/ADSL2/ADSL2+/VDSL (Very-high-bit-rate Digital Subscriber loop; Very-high-bit-rate digital subscriber loop) access technology all is difficult to continue to satisfy high bandwidth user's access demand in transmission range on the uplink and downlink transmission rate.
The standard that ITU has passed through VDSL2 (second generation VDSL) in May, 2005 behind first generation VDSL G.993.2; VDSL2 is through spread-spectrum and improve transmit power spectral density; Support higher transmission rate and longer transmission range; Satisfying in the future, the user has a good application prospect to the demand of high bandwidth.But with other DSL (Digital Subscriber loop, DSL) compared with techniques, VDSL2 is owing to use very wide frequency range, and the circuit noise that receives is disturbed also even more serious; And the decay of high-frequency signal itself is very big, and is very responsive to circuit noise, so noise has become the principal element of restriction VDSL2 system transmissions performance and stability.In addition, before VDSL2 occurred, access technologies such as ADSL, ADSL2/2+, VDSL had developed and have had a certain hour.The appearance of VDSL2; A lot of defectives of the access technology that exists before can solving; But in one period; VDSL2 needs and several kinds of existing cut-in methods and equipment are also deposited, and this has just brought the cross-interference issue of extensive concern in the practical application, yet the method for testing that does not also have relevant testing standard that the VDSL2 circuit is crosstalked is at present stipulated.
Summary of the invention
The crosstalk test approach that the present invention provides a kind of VDSL2 to insert the user is in order to solve the problem that method of testing that the testing standard that also not have in the prior art to be correlated with crosstalks to the VDSL2 circuit is stipulated.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of crosstalk test approach of second generation ultra-high speed numeral user loop switch-in user; Be used for testing same line and prick crosstalking mutually between second generation very-high-bit-rate digital subscriber loop VDSL2 class access user and other types DSL DSL access user, comprise step:
A, line is pricked length be made as predetermined short distance value;
B, close the upper and lower capable power that second generation very-high-bit-rate digital subscriber loop VDSL2 class inserts the user and subdue function;
All inserted the client device that the user connects during C, release line were pricked, and write down all kinds of access users' link setup situation;
All inserted the client device that the user connects during D, closed line were pricked; Open the client device that all kinds of access users connect successively; Behind the client device of opening certain type of access user connection; Insert in user's link setup process and link setup is accomplished the back and opened other kinds and insert user's clients corresponding equipment at such respectively, write down in the link setup process respectively and the link setup completion after the link setup situation of all types of user;
E, unlatching second generation very-high-bit-rate digital subscriber loop VDSL2 class insert user's uplink and downlink power and subdue function; Second generation very-high-bit-rate digital subscriber loop VDSL2 class being inserted other types access user's in user and the line bundle spectrum overlapping partly slots; All inserted the client device that the user connects during release line was pricked, and write down all kinds of access users' link setup situation; All inserted the client device that the user connects during closed line was pricked; Open the client device that all kinds of access users connect successively; Behind the client device of opening certain type of access user connection; Insert in user's link setup process and link setup is accomplished the back and opened other kinds and insert user's clients corresponding equipment at such respectively, write down in the link setup process respectively and the link setup completion after the link setup situation of all types of user;
F, line is pricked length be made as predetermined longly, repeat a step B to step e apart from value.
Also comprise step before the said steps A:
All kinds of access users' in the said line bundle line parameter circuit value is used as default, and the second generation ADSL ADSL2+ class of ADSL ADSL class access user and spread spectrum inserts the user and is set to not speed limit of up-downgoing simultaneously.
But the link setup situation of all types of user comprised link setup user's link building rate and this performance parameter of setting up link during said line was pricked.
The said performance parameter that this sets up link comprises signal to noise ratio, decay, real output and the achievable rate of this link.
A kind of crosstalk test approach of second generation ultra-high speed numeral user loop switch-in user is used for testing same line and pricks crosstalking certainly between the second generation very-high-bit-rate digital subscriber loop VDSL2 class access user, comprises step:
A, line is pricked length be made as predetermined short distance value;
All second generation very-high-bit-rate digital subscriber loop VDSL2 access users' uplink and downlink power was subdued function during B, closed line were pricked;
All second generation very-high-bit-rate digital subscriber loop VDSL2 inserted the client device that the user connects during C, release line were pricked, and all second generation very-high-bit-rate digital subscriber loop VDSL2 inserted user's link setup situation during call wire was pricked;
D, line pricked in part second generation very-high-bit-rate digital subscriber loop VDSL2 insert and open again after the user closes, all second generation very-high-bit-rate digital subscriber loop VDSL2 inserted users' link setup situation during call wire was pricked;
E, line pricked in all second generation very-high-bit-rate digital subscriber loop VDSL2 uplink and downlink power of inserting users subdue function and open; And Impulse Noise Protection value and time delay value are set for each second generation very-high-bit-rate digital subscriber loop VDSL2 user; All second generation very-high-bit-rate digital subscriber loop VDSL2 inserted the client device that the user connects during release line was pricked; All second generation very-high-bit-rate digital subscriber loop VDSL2 inserted user's link setup situation during call wire was pricked; After part second generation very-high-bit-rate digital subscriber loop VDSL2 access user closes in the line bundle, open again; All second generation very-high-bit-rate digital subscriber loop VDSL2 inserted user's link setup situation during call wire was pricked, and in record link setup situation, write down each second generation very-high-bit-rate digital subscriber loop VDSL2 user's actual pulse noise protection value and time delay value;
F, line is pricked length be made as predetermined longly, repeat a step B to step e apart from value.
Comprise also before the said steps A that second generation very-high-bit-rate digital subscriber loop VDSL2 during said line pricked inserts the step that user's line parameter circuit value uses as default.
But all second generation very-high-bit-rate digital subscriber loop VDSL2 access users' link setup situation comprised link setup user's link building rate and this performance parameter of setting up link during said line was pricked.
The said performance parameter that this sets up link comprises signal to noise ratio, decay, real output and the achievable rate of this link.
Because the present invention has adopted above technical scheme, therefore have following beneficial effect:
Adopt the method for the invention; Can be on the basis that does not need special test equipment; VDSL2 from crosstalking and testing with other various access users' the situation of crosstalking mutually, is better simulated the practical application scene, on the basis of practicing thrift cost, reach the test effect.Circuit scene in the inventive method has contained short distance, has grown the different situations of distance; The present invention is directed to the Different Effects situation of crosstalking under the situation of not opening new characteristic of VDSL2 itself and the relevant new features of unlatching simultaneously compares; Make test more comprehensive, effectively.
Description of drawings
Fig. 1 inserts the user for VDSL2 class in the same line bundle of test among the present invention and other types DSL inserts the flow chart of crosstalking mutually between the user;
Fig. 2 is for the ADSL class that test VDSL2 class inserts user and collinear bundle inserts the user, the ADSL2+ class inserts the user and the VDSL class inserts the sketch map of crosstalking mutually between the user;
Fig. 3 inserts the sketch map of crosstalking mutually between the user for the ADSL class that test VDSL2 class inserts user and collinear bundle;
Fig. 4 inserts the line sketch map of crosstalking mutually between the user for the VDSL class that test VDSL2 class inserts user and collinear bundle;
Fig. 5 inserts the flow chart of crosstalking certainly between user for each VDSL2 in the same line bundle of test among the present invention;
Fig. 6 inserts the line sketch map of crosstalking mutually between the user for the VDSL class that test VDSL2 class among the present invention inserts user and collinear bundle.
Embodiment
The present invention is directed to the VDSL2 technology of newly-developed and can have VDSL2, ADSL, ADSL2/2+, VDSL and situation of depositing and the current defective that does not have the dependence test standard in the long duration from now on; Propose VDSL2 access user's crosstalk test approach, comprised the test of crosstalking certainly that VDSL2 inserts crosstalking mutually test and VDSL2 access user between user and other access users.The present invention can be by the higher tester of price, and the simulation practical application scene that can try one's best, reaches better test effect.
See also Fig. 1, this figure is that the VDSL2 class inserted the flow chart of crosstalking mutually between user and other types DSL access user during the same line of test was pricked among the present invention, and it mainly comprises step:
Step 10, said line pricked in all kinds of tested access users be connected with its clients corresponding equipment.
Step 11, said line pricked in all kinds of access users' line parameter circuit value use as default, wherein the ADSL class inserts the user and ADSL2+ class access user is set to not speed limit of up-downgoing simultaneously.
Step 12, line is pricked length be made as predetermined short distance value, be set to usually below 10 meters.
Step 13, close that ascending power that the VDSL2 class inserts the user is subdued (UPBO) function and descending power is subdued (DPBO) function.
All inserted the client device that the user connects during step 14, release line were pricked, and write down all kinds of access users' link setup situation.
The client device that all tested access users connected during step 15, closed line were pricked; Open the client device that all kinds of access users connect successively; Behind the client device of opening certain type of access user connection; Insert user's link setup process at such respectively and open other kinds accesses user clients corresponding equipment, the link setup situation of record all types of user.
The client device that all tested access users connected during step 16, closed line were pricked; Open the client device that all kinds of access users connect successively; Behind the client device of opening certain type of access user connection; Insert at such respectively and open other kinds accesses user clients corresponding equipment, the link setup situation of record all types of user after user's link setup is accomplished.
Step 17, unlatching VDSL2 class access user's ascending power subdues function and descending power is subdued function, the VDSL2 class is inserted other types access user's in user and the line bundle spectrum overlapping and partly slots, and repeated execution of steps 14 is to step 16.
Step 18, line is pricked length be made as predetermined longly apart from value, as 1 kilometer or 1.5 kilometers, repeated execution of steps 13 is to step 17.
After having simulated above-mentioned various scene, sum up the various situation of record into form, and compare.
But the link setup situation that writes down in the said process is link setup user's link building rate and this performance parameter of setting up link, mainly comprises signal to noise ratio, decay, real output and the achievable rate etc. of this link.
Below by three concrete instances the idiographic flow of crosstalking mutually that VDSL2 class in the same line bundle of test among the present invention inserts between user and other types DSL access user is given further detailed explanation:
See also Fig. 2, this figure is that ADSL class access user, ADSL2+ class access user and the VDSL class that test VDSL2 class inserts user and collinear bundle inserts the line sketch map of crosstalking mutually between the user, and its concrete test process is following:
Step 20, the VDSL2 class is inserted user and corresponding VDSL2 client device connection; The VDSL class inserts the user and connects with corresponding VDSL client device; The ADSL class inserts the user and connects with corresponding ADSL client device; The ADSL2+ class inserts the user and connects with corresponding ADSL2+ client device, and the client device that all kinds of access users are connected all is set to closed condition.
Step 21, line pricked in all kinds of tested access users' line parameter circuit values use as default, wherein the ADSL class inserts the user and ADSL2+ class access user is set to not speed limit of up-downgoing simultaneously.
Step 22, line is pricked length be made as predetermined short distance value, be set to usually below 10 meters.
Step 23, close that ascending power that the VDSL2 class inserts the user is subdued function and descending power is subdued function.
The client device that all kinds of tested access users connected during step 24, release line were pricked; The link setup situation of the observing all kinds of access users line item of going forward side by side; After circuit is stable; If can link setup, the link building rate, signal to noise ratio, decay, real output, the achievable rate that then write down under this kind circuit situation be equivalent.
The client device that all kinds of tested access users connected during step 25, closed line were pricked; Open the VDSL2 class then and insert the client device that the user connects; Insert the client device of opening other kinds accesses users connection in user's link setup process at each VDSL2; The link setup situation of the observing various users line item of going forward side by side, if stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate in such cases is equivalent successively.
The client device that all kinds of tested access users connected during step 26, closed line were pricked; Open the VDSL class then and insert the client device that the user connects; Insert the client device of opening other kinds accesses users connection in user's link setup process at each VDSL; The link setup situation of the observing various users line item of going forward side by side, if stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate in such cases is equivalent successively.
The client device that all kinds of tested access users connected during step 27, closed line were pricked; Open the ADSL class then and insert the client device that the user connects; Insert the client device of opening other kinds accesses users connection in user's link setup process at each ADSL; The link setup situation of observing each user line item of going forward side by side, if stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate in such cases is equivalent successively.
The client device that all kinds of tested access users connected during step 28, closed line were pricked; Open the ADSL2+ class then and insert the client device that the user connects; Insert the client device of opening other kinds accesses users connection in user's link setup process at each ADSL2+; The link setup situation of observing each user line item of going forward side by side, if stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate in such cases is equivalent successively.
The client device that all kinds of tested access users connected during step 29, closed line were pricked; Open the VDSL2 class then and insert the client device that the user connects; Insert the stable back of user's link setup at each VDSL2 and open the client device that other kinds access users connect; The link setup situation of the observing various users line item of going forward side by side, if stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate in such cases is equivalent successively.
The client device that all kinds of tested access users connected during step 30, closed line were pricked; Open the VDSL class then and insert the client device that the user connects; Insert the stable back of user's link setup at each VDSL and open the client device that other kinds access users connect; The link setup situation of the observing various users line item of going forward side by side, if stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate in such cases is equivalent successively.
The client device that all kinds of tested access users connected during step 31, closed line were pricked; Open the ADSL class then and insert the client device that the user connects; Insert the stable back of user's link setup at each ADSL and open the client device that other kinds access users connect; The link setup situation of the observing various users line item of going forward side by side, if stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate in such cases is equivalent successively.
The client device that all kinds of tested access users connected during step 32, closed line were pricked; Open the ADSL2+ class then and insert the client device that the user connects; Insert the stable back of user's link setup at each ADSL2+ and open the client device that other kinds access users connect; The link setup situation of the observing various users line item of going forward side by side, if stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate in such cases is equivalent successively.
Step 33, unlatching VDSL2 class access user's ascending power subdues function and descending power is subdued function; The VDSL2 class is inserted ADSL class access user, ADSL2+ class access user and VDSL class access user's in user and the line bundle spectrum overlapping part; Be the processing of slotting of frequency range between 3.0M-3.75M, 5.1M-5.2M, the 7.05M-8.5M, repeated execution of steps 24 is to step 32.
Step 34, line is pricked length be made as predetermined longly apart from value, as 1 kilometer or 1.5 kilometers, repeated execution of steps 23 is to step 33.
After having simulated above-mentioned various scene, sum up the various situation of record into form, and compare.
See also Fig. 3, this figure is that test VDSL2 class inserts the line sketch map of crosstalking mutually between the ADSL class access user of user and collinear bundle, and its concrete test process is following:
Step 40, the VDSL2 class is inserted user and corresponding VDSL2 client device connection; ADSL class access user and corresponding ADSL client device connect, and the client device of VDSL2 class access user connection and the client device of ADSL class access user connection all are set to closed condition.
Step 41, line pricked in the VDSL2 class insert the line parameter circuit value that user and ADSL class insert the user and use as default, wherein ADSL class access user is set to not speed limit of up-downgoing simultaneously.
Step 42, line is pricked length be made as predetermined short distance value, be set to usually below 10 meters.
Step 43, close the descending power that the VDSL2 class inserts the user and subdue function.
The VDSL2 class inserted the client device of user and ADSL class access user connection during step 44, release line were pricked; Observe two types of link setup situation that insert users line item of going forward side by side; After circuit is stable; If can link setup, the link building rate, signal to noise ratio, decay, real output, the achievable rate that then write down under this kind circuit situation be equivalent.
The VDSL2 class inserted the client device of user and ADSL class access user connection during step 45, closed line were pricked; Open the VDSL2 class then earlier and insert the client device that the user connects; Insert the client device of opening ADSL class access user connection in user's link setup process at each VDSL2; Observe two types of link setup situation that insert users line item of going forward side by side; If stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate equivalence in such cases successively.
The VDSL2 class inserted the client device of user and ADSL class access user connection during step 46, closed line were pricked; Open the ADSL class then earlier and insert the client device that the user connects; Insert the client device of opening VDSL2 class access user connection in user's link setup process at each ADSL; Observe two types of link setup situation that insert users line item of going forward side by side, if stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate in such cases is equivalent successively.
The VDSL2 class inserted the client device of user and ADSL class access user connection during step 47, closed line were pricked; Open the VDSL2 class then earlier and insert the client device that the user connects; Insert the stable back of user's link setup at each VDSL2 and open the client device that ADSL class access user connects; Observe two types of link setup situation that insert users line item of going forward side by side; If stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate equivalence in such cases successively.
The VDSL2 class inserted the client device of user and ADSL class access user connection during step 48, closed line were pricked; Open the ADSL class then earlier and insert the client device that the user connects; Insert the stable back of user's link setup at each ADSL and open the client device that VDSL2 class access user connects; Observe two types of link setup situation that insert users line item of going forward side by side, if stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate in such cases is equivalent successively.
Step 49, open the descending power that the VDSL2 class inserts the user and subdue function, with the VDSL2 class insert the user prick with line in ADSL class access user's spectrum overlapping part, i.e. the processing of slotting of frequency range between the 1.1M-3.75M, repeated execution of steps 44 is to step 48.
Step 50, line is pricked length be made as predetermined longly apart from value, as 1 kilometer or 1.5 kilometers, repeated execution of steps 43 is to step 49.
After having simulated above-mentioned various scene, sum up the various situation of record into form, and compare.
See also Fig. 4, this figure is that test VDSL2 class inserts the line sketch map of crosstalking mutually between the VDSL class access user of user and collinear bundle, and its concrete test process is following:
Step 60, the VDSL2 class is inserted user and corresponding VDSL2 client device connection; VDSL class access user and corresponding VDSL client device connect, and the client device of VDSL2 class access user connection and the client device of VDSL class access user connection all are set to closed condition.
Step 61, line pricked in the VDSL2 class insert the line parameter circuit value that user and VDSL class insert the user and use as default.
Step 62, line is pricked length be made as predetermined short distance value, be set to usually below 10 meters.
Step 63, close that ascending power that the VDSL2 class inserts the user is subdued function and descending power is subdued function.
The VDSL2 class inserted the client device of user and VDSL class access user connection during step 64, release line were pricked; Observe two types of link setup situation that insert users line item of going forward side by side; After circuit is stable; If can link setup, the link building rate, signal to noise ratio, decay, real output, the achievable rate that then write down under this kind circuit situation be equivalent.
The VDSL2 class inserted the client device of user and VDSL class access user connection during step 65, closed line were pricked; Open the VDSL2 class then earlier and insert the client device that the user connects; Insert the client device of opening VDSL class access user connection in user's link setup process at each VDSL2; Observe two types of link setup situation that insert users line item of going forward side by side; If stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate equivalence in such cases successively.
The VDSL2 class inserted the client device of user and VDSL class access user connection during step 66, closed line were pricked; Open the VDSL class then earlier and insert the client device that the user connects; Insert the client device of opening VDSL2 class access user connection in user's link setup process at each VDSL; Observe two types of link setup situation that insert users line item of going forward side by side, if stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate in such cases is equivalent successively.
The VDSL2 class inserted the client device of user and VDSL class access user connection during step 67, closed line were pricked; Open the VDSL2 class then earlier and insert the client device that the user connects; Insert the stable back of user's link setup at each VDSL2 and open the client device that VDSL class access user connects; Observe two types of link setup situation that insert users line item of going forward side by side; If stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate equivalence in such cases successively.
The VDSL2 class inserted the client device of user and VDSL class access user connection during step 68, closed line were pricked; Open the VDSL class then earlier and insert the client device that the user connects; Insert the stable back of user's link setup at each VDSL and open the client device that VDSL2 class access user connects; Observe two types of link setup situation that insert users line item of going forward side by side, if stable back can link setup, record link building rate, signal to noise ratio, decay, real output, achievable rate in such cases is equivalent successively.
Step 69, unlatching VDSL2 class access user's ascending power subdues function and descending power is subdued function; The VDSL2 class is inserted VDSL class access user's in user and the line bundle spectrum overlapping part; Be the processing of slotting of frequency range between 3.0M-3.75M, 5.1M-5.2M, the 7.05M-8.5M, repeated execution of steps 64 is to step 68.
Step 70, line is pricked length be made as predetermined longly apart from value, as 1 kilometer or 1.5 kilometers, repeated execution of steps 63 is to step 69.
After having simulated above-mentioned various scene, sum up the various situation of record into form, and compare.
See also Fig. 5, this figure is that each VDSL2 inserted the flow chart of crosstalking certainly between the user during the same line of test was pricked among the present invention, and it mainly comprises step:
Step 80, line pricked in each VDSL2 insert user and be connected with its clients corresponding equipment.
Step 81, said line pricked in each VDSL2 line parameter circuit value of inserting the user use as default.
Step 82, line is pricked length be made as predetermined short distance value, be set to usually below 10 meters.
The ascending power that all VDSL2 inserted users during step 83, closed line were pricked subdues function and descending power is subdued function.
All VDSL2 inserted the client device that the user connects during step 84, release line were pricked, and write down the link setup situation that each VDSL2 inserts the user.
Step 85, line pricked in part VDSL2 insert and open again after the user closes, all VDSL2 inserted users' link setup situation during call wire was pricked.
Step 86, unlatching VDSL2 class access user's ascending power subdues function and descending power is subdued function; And Impulse Noise Protection value and time delay value are set for each VDSL2 user; Repeating step 84 and step 85, and in record link setup situation, write down each VDSL2 user's actual pulse noise protection value and time delay value.
Step 87, line is pricked length be made as predetermined longly apart from value, as 1 kilometer or 1.5 kilometers, repeated execution of steps 83 is to step 86.
After having simulated above-mentioned various scene, sum up the various situation of record into form, and compare.
But the link setup situation that writes down in the said process is link setup user's link building rate and this performance parameter of setting up link, mainly comprises signal to noise ratio, decay, real output and the achievable rate etc. of this link.
Below by a concrete instance idiographic flow of crosstalking certainly that each VDSL2 in the same line bundle of test among the present invention inserts between user is given further detailed explanation:
See also Fig. 6, this figure is that test VDSL2 class inserts the line sketch map of crosstalking mutually between the VDSL class access user of user and collinear bundle among the present invention, and its concrete test process is following:
Step 90, line pricked in each VDSL2 insert user and be connected with its clients corresponding equipment.
Step 91, said line pricked in each VDSL2 line parameter circuit value of inserting the user use as default.
Step 92, line is pricked length be made as predetermined short distance value, be set to usually below 10 meters.
The ascending power that all VDSL2 inserted users during step 93, closed line were pricked subdues function and descending power is subdued function.
All VDSL2 inserted the client device that the user connects during step 94, release line were pricked; Write down the link setup situation that each VDSL2 inserts the user; All VDSL2 users are link setup normally, writes down link building rate that all tested VDSL2 insert users, signal to noise ratio, decay simultaneously, actually goes out line parameter circuit value values such as power output, achievable rate.
Step 95, line pricked in part VDSL2 insert and open again after the user closes; All VDSL2 inserted users' link setup situation during call wire was pricked, and write down link building rate that all tested VDSL2 insert users, signal to noise ratio, decay, actually went out line parameter circuit value values such as power output, achievable rate.
Step 96, unlatching VDSL2 class access user's ascending power subdues function and descending power is subdued function; Each VDSL2 user's Impulse Noise Protection value is set to 2; Time delay value is set to 16; Repeating step 94 and step 95, and in record link setup situation, write down each VDSL2 user's actual pulse noise protection value and time delay value.
Step 97, line is pricked length be made as predetermined longly apart from value, as 1 kilometer or 1.5 kilometers, repeated execution of steps 93 is to step 96.
After having simulated above-mentioned various scene, sum up the various situation of record into form, and compare.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. the crosstalk test approach of a second generation ultra-high speed numeral user loop switch-in user; Be used for testing same line and prick crosstalking mutually between second generation very-high-bit-rate digital subscriber loop VDSL2 class access user and other types DSL DSL access user; It is characterized in that, comprise step:
A, line is pricked length be made as predetermined short distance value;
B, close the upper and lower capable power that second generation very-high-bit-rate digital subscriber loop VDSL2 class inserts the user and subdue function;
All inserted the client device that the user connects during C, release line were pricked, and write down all kinds of access users' link setup situation;
All inserted the client device that the user connects during D, closed line were pricked; Open the client device that all kinds of access users connect successively; Behind the client device of opening certain type of access user connection; Insert in user's link setup process and link setup is accomplished the back and opened other kinds and insert user's clients corresponding equipment at such respectively, write down in the link setup process respectively and the link setup completion after the link setup situation of all types of user;
E, unlatching second generation very-high-bit-rate digital subscriber loop VDSL2 class insert user's uplink and downlink power and subdue function; Second generation very-high-bit-rate digital subscriber loop VDSL2 class being inserted other types access user's in user and the line bundle spectrum overlapping partly slots; All inserted the client device that the user connects during release line was pricked, and write down all kinds of access users' link setup situation; All inserted the client device that the user connects during closed line was pricked; Open the client device that all kinds of access users connect successively; Behind the client device of opening certain type of access user connection; Insert in user's link setup process and link setup is accomplished the back and opened other kinds and insert user's clients corresponding equipment at such respectively, write down in the link setup process respectively and the link setup completion after the link setup situation of all types of user;
F, line is pricked length be made as predetermined longly, repeat a step B to step e apart from value.
2. the method for claim 1 is characterized in that, also comprises step before the said steps A:
All kinds of access users' in the said line bundle line parameter circuit value is used as default, and the second generation ADSL ADSL2+ class of ADSL ADSL class access user and spread spectrum inserts the user and is set to not speed limit of up-downgoing simultaneously.
3. the method for claim 1 is characterized in that, but said line prick in the link setup situation of all types of user comprise link setup user's link building rate and this performance parameter of setting up link.
4. method as claimed in claim 3 is characterized in that, the said performance parameter that this sets up link comprises signal to noise ratio, decay, real output and the achievable rate of this link.
5. the crosstalk test approach of a second generation ultra-high speed numeral user loop switch-in user is used for testing same line and pricks crosstalking certainly between the second generation very-high-bit-rate digital subscriber loop VDSL2 class access user, it is characterized in that, comprises step:
A, line is pricked length be made as predetermined short distance value;
All second generation very-high-bit-rate digital subscriber loop VDSL2 access users' uplink and downlink power was subdued function during B, closed line were pricked;
All second generation very-high-bit-rate digital subscriber loop VDSL2 inserted the client device that the user connects during C, release line were pricked, and all second generation very-high-bit-rate digital subscriber loop VDSL2 inserted user's link setup situation during call wire was pricked;
D, line pricked in part second generation very-high-bit-rate digital subscriber loop VDSL2 insert and open again after the user closes, all second generation very-high-bit-rate digital subscriber loop VDSL2 inserted users' link setup situation during call wire was pricked;
E, line pricked in all second generation very-high-bit-rate digital subscriber loop VDSL2 uplink and downlink power of inserting users subdue function and open; And Impulse Noise Protection value and time delay value are set for each second generation very-high-bit-rate digital subscriber loop VDSL2 user; All second generation very-high-bit-rate digital subscriber loop VDSL2 inserted the client device that the user connects during release line was pricked; All second generation very-high-bit-rate digital subscriber loop VDSL2 inserted user's link setup situation during call wire was pricked; After part second generation very-high-bit-rate digital subscriber loop VDSL2 access user closes in the line bundle, open again; All second generation very-high-bit-rate digital subscriber loop VDSL2 inserted user's link setup situation during call wire was pricked, and in record link setup situation, write down each second generation very-high-bit-rate digital subscriber loop VDSL2 user's actual pulse noise protection value and time delay value;
F, line is pricked length be made as predetermined longly, repeat a step B to step e apart from value.
6. method as claimed in claim 5 is characterized in that, comprises also before the said steps A that second generation very-high-bit-rate digital subscriber loop VDSL2 during said line pricked inserts the step that user's line parameter circuit value uses as default.
7. method as claimed in claim 5 is characterized in that, but said line prick in all second generation very-high-bit-rate digital subscriber loop VDSL2 link setup situation of inserting users comprise link setup user's link building rate and this performance parameter of setting up link.
8. method as claimed in claim 7 is characterized in that, the said performance parameter that this sets up link comprises signal to noise ratio, decay, real output and the achievable rate of this link.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6633545B1 (en) * | 1999-07-30 | 2003-10-14 | Cisco Technology, Inc. | System and method for determining the data rate capacity of digital subscriber lines |
| CN1897545A (en) * | 2005-07-11 | 2007-01-17 | 上海欣泰通信技术有限公司 | Method and system for testing asymmetric digital user outgoing rate |
| CN101110739A (en) * | 2007-07-03 | 2008-01-23 | 中兴通讯股份有限公司 | Method for implementing non-standard low-speed chain building on serial high bit rate digital subscriber line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6633545B1 (en) * | 1999-07-30 | 2003-10-14 | Cisco Technology, Inc. | System and method for determining the data rate capacity of digital subscriber lines |
| CN1897545A (en) * | 2005-07-11 | 2007-01-17 | 上海欣泰通信技术有限公司 | Method and system for testing asymmetric digital user outgoing rate |
| CN101110739A (en) * | 2007-07-03 | 2008-01-23 | 中兴通讯股份有限公司 | Method for implementing non-standard low-speed chain building on serial high bit rate digital subscriber line |
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