CN102123433B - Device and method for testing switch time relay during mobile communication handover process - Google Patents
Device and method for testing switch time relay during mobile communication handover process Download PDFInfo
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Abstract
The invention provides a device and a method for testing switch time relay of data and audio during a mobile communication handover process. The device comprises a movable testing terminal and data transmission modules, wherein test data packets with identifies and/or audio signals with preset frequencies are transmitted between the data transmission modules which are arranged on the testing terminal and a network side respectively and the handover time relay is calculated by the data transmission modules. The method comprises: the testing terminal carries out handover among cells; the test data packets with identifies and/or the audio signals with preset frequencies are periodically transmitted at preset time intervals between the data transmission modules which are arranged on the testing terminal and the network side; and the data transmission modules receiving data and/or audio are used for computing the handover time relay according to the change in the sequences or audio characteristics of the received data packets. The device provided by the invention can be applied to various mobile communication network environments and meanwhile can be used for correctly detecting user voice and time relay of data handover in a mobile communication system and improving the testing accuracy of time delay.
Description
This application is that application number be " 200810117956.4 ", the applying date is the divisional application of " on August 18th, 2008 ", the invention and created name application for a patent for invention that is " testing apparatus of switch delay time in mobile communication switch course and method ".
Technical field
The present invention relates to delay testing, refer in particular to testing apparatus and the method for data and Audio conversion time delay in mobile communication subscriber handoff procedure.
Background technology
The mode that existing cellular mobile communication networks adopts multiple communities to cover continuously realizes seamless switching.Whole area of communications services is covered continuously by multiple communities, need to be the switching of minizone when user constantly moves in network coverage area, and guarantee that communication is not interrupted when switching.The process of switching, is normally first connected with original cell outage and communicates by letter, and then connects and recovers to communicate by letter with Target cell.If user is first and Target cell connects, and then is connected with original cell outage, in handoff procedure, communication can keep always so, the temporary transient interrupt procedure of the imperceptible obvious communication of user, and we claim this soft handover that switches to.Conventionally application soft handover in CDMA mobile communication systems (Code Division Multiple Access, hereinafter to be referred as CDMA).
And in the most communication system except CDMA (as gsm system, TD-SCDMA system etc.), due to system, user needs first and original cell outage to be connected, and then connect and recover to communicate by letter with Target cell.In this manner, if therefrom disconnection receive recover communication time longer, user will feel obvious interruption in voice call process, has more loss of data in data service communication process.In cell mobile communication systems, can there is the handoff procedure of enormous amount in every day, if this problem is not found and is solved, will attract more user's complaint and complain, and reduces the service quality level of communication network.
In order to address this problem, we are defined in cell switch process therefrom disconnection, and to receive the time of recovering communication be handover delay.Handover delay, as the important indicator of a measurement communication quality, is investigated the communication disruption length in switching with helping operator, analyzes in switching and causes the long reason of time delay, thereby network is optimized, and improves service quality.
It is the time interval of calculating between signaling that current handover delay is tested conventional method, calculate from network and issue switching command to the time interval of receiving the handoff completion message that terminal is returned, and the result using this time interval as handover delay.Although this mode is simple and easy to do, has the following disadvantages in accuracy:
(1) time delay spacing of signaling can not represent the data break period in practical communication completely.Conventionally switching command issues terminal after a period of time and just can interrupt and the communicating by letter of original community, complete He Xin community connect terminal after a period of time just can be to network transmission handoff completion message.Therefore, actual communication interruption time is less than the time interval between hand off signaling conventionally.
(2), in switching, although often occur that hand off signaling flow process has completed, actual telex network does not recover, and causes last communication disruption.In this case, statistics, can not reflect the problem of actual generation completely, give network operator with illusion, incur loss through delay the time that problem solves.
(3) the hand off signaling form that different cell mobile communication systemses adopt, signaling title is conventionally different, in many networking operational environments (as GSM net and CDMA net are runed simultaneously), operator need to be distinguished different networks conventionally, more complicated in Operation and Maintenance and data statistics, is inconvenient to provide complete unified result under many network conditions.
Summary of the invention
For the defect existing in prior art and deficiency, object of the present invention proposes a kind of apparatus and method of mobile communication subscriber handover delay test, the present invention directly measures the communication interruption time of the voice-and-data of user's face in handoff procedure, can investigate more accurately and switch in generating process, the actual interrupt time of telex network, thus the actual performance of switching aspect in the network operation investigated more rapidly, accurately and easily.
In order to achieve the above object, the present invention proposes in a kind of mobile communication subscriber handoff procedure, the testing apparatus of data exchange time delay, comprising:
Movably test terminal, described test terminal can between community, switch and with network side communication;
Data transmission module, described data transmission module is arranged at respectively described test terminal and network side, and transmits test packet at interval of a preset time T, and described test packet has identical sign and continuous sequence number;
Receiving terminal receives after test packet, calculates the quantity N of the test packet not receiving
i, and calculate handover delay Td according to T interval time that sends test packet
i=N
i× T.
As technique scheme preferably, described device also comprises:
Data analysis module, the sign of the test packet that described data analysis module receives according to described data transmission module filters out the test packet corresponding with this receiving terminal, and determines all test packets that occur in each handoff procedure;
Handover delay computing module, described handover delay computing module, according to the sequence number of the described test packet in handoff procedure, counts the quantity N of the test packet not receiving
i, i is the numbering of this time switching, and calculates handover delay Td according to T interval time that sends test packet
i=N
i× T.
As technique scheme preferably, described device also comprises:
Filter module, described filter module forms filter according to the time of hand off signaling;
Migration factor computing module, described migration factor computing module, according to the clock difference between receiving terminal and network side, arranges the migration factor of filter;
Described data analysis module filters out according to the sign of test packet the test packet that this receiving terminal is corresponding, and according to the transmitting time of test packet, all test packets while obtaining occurring in switching by filter and the migration factor.
Meanwhile, the invention allows for data exchange time delay measuring method in a kind of mobile communication switch course, comprising:
Switch in minizone step 1, test terminal, between test terminal and the data transmission module of network side, at interval of a preset time T, transmits test packet, and described test packet has identical sign and continuous sequence number;
Step 2, receiving terminal receive after test packet, calculate the quantity N of the test packet not receiving
i, and calculate handover delay Td according to T interval time that sends test packet
i=N
i× T.
As technique scheme preferably, described step 2 is specially:
Step 2a, receiving terminal are added up the test packet receiving, and filter out the test packet corresponding with this receiving terminal according to the sign of test packet, and determine all test packets that occur in each handoff procedure;
Step 2b, according to the sequence number of all test packets in handoff procedure, count the quantity N of the test packet not receiving
i, and calculate handover delay Td according to T interval time that sends test packet
i=N
i× T.
As technique scheme preferably, described step 2a is specially:
Step 2a1, receiving terminal form filter according to the time of hand off signaling;
Step 2a2, according to the clock difference between test terminal and network side, the migration factor of filter is set;
Step 2a3, according to the sign of test packet, filter out the test packet that this receiving terminal is corresponding, and according to the transmitting time of test packet, by filter and the migration factor, obtain occurring in all test packets while switching.
Meanwhile, the invention allows for a kind of mobile communication switch course sound intermediate frequency handover delay testing apparatus, comprising:
Movably test terminal, described test terminal can between community, switch and with network side communication;
Audio transmission module, described audio transmission module is arranged at respectively described test terminal and described network side, sends the audio signal of preset frequency between described network side and the audio transmission module of test terminal;
Receiving terminal receives after this audio signal, and the characteristic audio signal relatively receiving and the predeterminated frequency of audio signals calculate handover delay Tv
i, wherein i is the numbering of this time switching.
As technique scheme preferably, described device also comprises:
Audio analysis module, described audio analysis module is determined the audio frequency period wherein occurring in handoff procedure;
Handover delay computing module, the inconsistent time span Tv of predeterminated frequency of the characteristic audio signal that described handover delay computing module receives and the audio signal of transmitting
i, as handover delay.
As technique scheme preferably, described device also comprises:
Filter module, described filter module forms filter according to the time of hand off signaling;
Migration factor computing module, described migration factor computing module, according to the clock difference between the audio transmission module of received audio signal and network side, arranges the migration factor of filter;
Described audio analysis module, according to the audio signal receiving, obtains occurring in the audio frequency period in handoff procedure by filter and the migration factor.
Meanwhile, the invention allows for a kind of mobile communication switch course sound intermediate frequency handover delay method of testing, comprising:
Switch in minizone step I, test terminal, sends continuously audio-frequency test signal between test terminal and the audio transmission module of network side;
Step II, receiving terminal receive after audio-frequency test signal, according to the predeterminated frequency of the audio signal of the characteristic audio signal receiving and transmitting, calculate handover delay Tv
i.
As technique scheme preferably, described Step II is specially:
Step II a, receiving terminal form filter according to the time of hand off signaling;
Step II b, according to the clock difference between test terminal and network side, the migration factor of filter is set;
Step II c, according to filter and the migration factor, obtain occurring in the audio frequency period while switching, and calculate characteristic audio signal wherein and do not meet the time span Tv of predeterminated frequency
i, as the handover delay of this switching.
The present invention proposes testing apparatus and the method for data and Audio conversion time delay in a kind of mobile communication subscriber handoff procedure.Described device comprises movably test terminal and data transmission module, sends test packet and/or the predetermined frequency audio signal with like-identified and continuous sequence number, and calculate handover delay between this test terminal and network side.Described method comprises: switch in minizone test terminal, between test terminal and the data transmission module at network two ends, at interval of a preset time period transmission, there is the audio signal of test packet and/or the predeterminated frequency of sign, the data transmission module that receives data and/or audio frequency changes according to the sequence number or the acoustic characteristic that receive packet, calculates handover delay.Test packet of the present invention does not relate to bottom transmission technology, so just can in many networking operational environments, use simultaneously, and the time delay that can test accurately user speech in mobile communication system, data exchange, to improve the accuracy for delay testing simultaneously.
In prior art, compare, the present invention adopts the beneficial effect of technique scheme to be:
(1) because the present invention adopts the mode of measuring record and counting user data in handoff procedure break period, carry out handover delay calculating, can more accurately calculate the break period of user's face speech in handoff procedure or data, better observe and learn user by experience and experience.
(2) the present invention only need be with common mobile terminal, and can calculate the handover delay in the cellular mobile communication networks of different technologies, has eliminated the inconsistency of heterogeneous networks aspect hand off signaling, can in many networking operational environments, use simultaneously.By combining with the method for traditional statistics signaling plane handover delay, can better investigate the communication quality of network, the problem in the middle of more deep probe network.
(3) the present invention can also distinguish the time delay situation of statistics and Packet Service every business when concurrent.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device of the delay testing that proposes of the present invention
Fig. 2 is the flow chart of the time delay measuring method that proposes of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.For person of ordinary skill in the field, from detailed description of the invention, above and other object of the present invention, feature and advantage will be apparent.
The first preferred embodiment of the device that the mobile communication subscriber switching that the present invention proposes is tested according to handover delay as shown in Figure 1, comprising:
Movably test terminal, described test terminal can between community, switch and with network side communication;
Data transmission module, described data transmission module is arranged at respectively described test terminal and network side, and sends continuously test packet take preset time T as the cycle, and described packet has identical sign and continuous sequence number; Receiving terminal receives after test packet, calculates the quantity N of the test packet not receiving
i, and calculate handover delay Td according to T interval time that sends test packet
i=N
i× T.
Test is to occur between test terminal and network side, and network side and test terminal are all provided with data transmission module, so just can carry out respectively or simultaneously up test and descending test.Up test is movably test terminal and sends packet to network side, and now the data transmission module of test terminal is transmitting terminal, and the data transmission module of network side is receiving terminal; Descending test is network side and to test terminal movably, sends packet, and now the data transmission module of network side is transmitting terminal, and the data transmission module of test terminal is receiving terminal.The identical sign of packet is for the test signal with differentiation heterogeneous networks under many network condition, the data packet number N that continuous sequence number is lost with calculating for the continuity of identification data packet in handoff procedure
i.
Can to last result of calculation, revise based on experience value in actual use in the above-described embodiments.For example:
In once switching, there is packet packet loss one time, lost continuously 3 packets, according to formula, can calculate the handover delay that 3*T is data.
Again for example:
In once switching, occurred packet packet loss twice, once for losing 1 packet, another time, for having lost continuously 3 packets, rule of thumb can judge that when losing 1 packet be normal data packet transmission problem, not due to switching, causes.
Again for example:
In once switching, occurred data-bag lost one time, and this time only lost 1 packet, can think that this secondary data packet loss is for switching packet loss.
Mode that can certainly be by repeatedly testing value is to guarantee the reliability of data.Those skilled in that art are appreciated that in above-mentioned this that correction is based on experience value the one optimization for the first embodiment, and protection scope of the present invention is not limited only to this.
The second preferred embodiment of the device of the mobile communication subscriber handover delay test that the present invention proposes is to improve on the first above-mentioned preferred embodiment, and the device in the first preferred embodiment can also comprise:
Data analysis module, the sign of the packet that described data analysis module receives according to described data transmission module filters out the packet corresponding with this receiving terminal, and in specified data bag, occurs in all test packets in handoff procedure;
Handover delay computing module, described handover delay computing module, according to the sequence number of all test packets in handoff procedure, counts the quantity N of the packet of the continuous sequence number not receiving
i, i is the numbering of this time switching, and calculates handover delay Td according to T interval time that sends packet
i=N
i× T.
Above-mentioned data analysis module can be the independently module being connected with data transmission module with handover delay computing module, can be also the submodule that is positioned at data transmission module.These two kinds of modes can realize goal of the invention.
The 3rd preferred embodiment of the device of the mobile communication subscriber handover delay test that the present invention proposes is to improve on the second above-mentioned preferred embodiment, and the device in the second embodiment can also comprise:
Filter module, described filter module forms filter according to the time of hand off signaling;
Migration factor computing module, described migration factor computing module, according to the clock difference between test terminal and network side, arranges the migration factor of filter;
Described data analysis module filters out according to the sign of packet the packet that this receiving terminal is corresponding, and according to the transmitting time of packet, all test packets while obtaining occurring in switching by filter and the migration factor.
Wherein filter module can be both the standalone module being connected with data analysis module with migration factor computing module, can be also the submodule of data analysis module.These two kinds of modes can realize goal of the invention.
Migration factor computing module is to arrange in order to distinguish the test packet which occurs in handoff procedure.Because the clock of receiving terminal and transmitting terminal may have deviation, particularly when terminal is as receiving terminal, therefore likely transmitting terminal record is the switching occurring at the 0th second, and receiving terminal clock has been indicated as the 4th second, now receiving terminal carries out the wrong reservation receiving terminal of the filtration meeting data of the 0th second according to the signaling time of transmitting terminal, and the receiving terminal packet of the 4th second is omitted, cause the mistake of data to filter.In order to improve the accuracy of test, the clock of receiving terminal relatively need to be obtained to the migration factor according to the system clock of network side.
As a kind of mode realizing, can simply think: data transmission module is a testing software, and this testing software is arranged on respectively in network side and test terminal.When test, by IP address and the port numbers of test terminal and network side setting communication, move according to predetermined paths test terminal, and test terminal and network carry out data transmission between the two simultaneously, and testing software can obtain the test data for testing handover delay.
In above-mentioned first, second and third embodiment, the test packet of transmission can be the packet of ICMP agreement, and described ICMP protocol test packet has default data packet length, unique sign and continuous sequence number.ICMP agreement is ripe ICP/IP protocol, in the present embodiment, by ICMP agreement, sends packet, can realize test having preset behind the IP address of test terminal and network side, does not need the network to testing to carry out any transformation.The present invention is directed to the packet of ICMP agreement simultaneously, defined data packet length S, unique sign and continuous sequence number Sequence Number.Preset data packet length S is the consistency in order to test, and for excessive or too small test pack, can reach default data packet length S by mend 0 mode in position, end.For continuous sequence number Sequence Number, to be the convenience receiving during packet in order adding up, only need can to learn to data packet sequencing the quantity of the packet of wherein losing.
The 4th preferred embodiment of the present invention be mobile communication subscriber switching according to handover delay method of testing, its flow process comprises:
Switch in minizone step 1, test terminal, and the data transmission module of test terminal and network side sends test packet take preset time T as the cycle, and described test packet has identical sign and continuous sequence number;
Step 2, receiving terminal receive after test packet, calculate the quantity N of the test packet of the continuous sequence number not receiving
i, and calculate handover delay Td according to T interval time that sends test packet
i=N
i× T.
Test is to occur between test terminal and network side.Network side and test terminal are all provided with data transmission module, so just can carry out respectively or simultaneously up test and descending test.Up test is movably test terminal and sends packet to network side, and now the data transmission module of test terminal is transmitting terminal, and the data transmission module of network side is receiving terminal; Descending test is network side and to test terminal movably, sends packet, and now the data transmission module of network side is transmitting terminal, and the data transmission module of test terminal is receiving terminal.The sign of packet be under many network condition to distinguish the test signal of heterogeneous networks, and for the continuity of identification data packet is to calculate the data packet number Ni losing.
The 5th preferred embodiment of the present invention is to improve on the basis of above-mentioned the 4th preferred embodiment, and step 2 can be specially:
Step 2a, receiving terminal are added up the test packet receiving, and filter out the test packet corresponding with this receiving terminal according to the sign of test packet, and in definite test packet, occur in all test packets in handoff procedure;
Step 2b, according to the sequence number of all test packets in handoff procedure, count the quantity N of the test packet of the continuous sequence number not receiving
i, and calculate handover delay Td according to T interval time that sends test packet
i=N
i× T.
The 6th preferred embodiment of the present invention is to improve on the basis of above-mentioned the 5th preferred embodiment, and step 2a can be specially:
Step 2a1, receiving terminal form filter according to the time of hand off signaling;
Step 2a2, according to the clock difference between test terminal and network side, the migration factor of filter is set;
Step 2a3, according to the sign of test packet, filter out the test packet that this receiving terminal is corresponding, and according to the transmitting time of test packet, by filter and the migration factor, obtain occurring in all test packets while switching.
The migration factor is to arrange in order to distinguish the test packet which occurs in handoff procedure.Because the clock of receiving terminal and transmitting terminal may have deviation, particularly when terminal is as receiving terminal, therefore likely transmitting terminal record is the switching occurring at the 0th second, and receiving terminal clock has been indicated as the 4th second, now receiving terminal carries out the wrong reservation receiving terminal of the filtration meeting data of the 0th second according to the signaling time of transmitting terminal, and the receiving terminal packet of the 4th second is omitted, cause the mistake of data to filter.In order to improve the accuracy of test, the clock of receiving terminal relatively need to be obtained to the migration factor according to the system clock of network side.
In above-mentioned fourth, fifth, six embodiment, the test packet of transmission can be the packet of ICMP agreement, and described ICMP protocol test packet has default data packet length, unique sign and continuous sequence number.ICMP agreement is ripe ICP/IP protocol, in the present embodiment, by ICMP agreement, sends packet, can realize test having preset behind the IP address of test terminal and network side, does not need the network to testing to carry out any transformation.The present invention is directed to the packet of ICMP agreement simultaneously, defined data packet length S, unique sign and continuous sequence number Sequence Number.Preset data packet length S is the consistency in order to test, and for excessive or too small test pack, can reach default data packet length S by mend 0 mode in position, end.For continuous sequence number Sequence Number, to be the convenience receiving during packet in order adding up, only need can to learn to data packet sequencing the quantity of the packet of wherein losing.
In above-mentioned one to six example, determining handover delay Td
iafter, all can be by each Td switching
icalculate mathematic expectaion Td_m, the standard deviation Td_delta of handover delay, value and cumulative distribution function.Then just each Td switching
iwith predefined handover delay maximum threshold Td_target comparison, the switching that exceedes maximum threshold is given to mark, according to specific switching corresponding in label lookup Fd_ho, the handover information that each handover delay is exceeded to threshold value is exported to network management system reference.
Audio conversion delay testing device when the 7th preferred embodiment of the present invention is mobile communication subscriber switching, comprising:
Movably test terminal, described test terminal can between community, switch and with network side communication;
Audio transmission module, described audio transmission module is arranged at respectively described test terminal and described network side, sends the audio signal of preset frequency between described network side and the audio transmission module of test terminal;
Receiving terminal receives after this audio signal, and the predeterminated frequency of the audio signal of the characteristic audio signal relatively receiving and transmitting terminal transmitting, calculates handover delay Tv
i.
Because test is to occur between test terminal and network side, therefore can be divided into up test and descending test.Up test is movably test terminal and sends audio signal to network side, and now the audio transmission module of test terminal is transmitting terminal, and the audio transmission module of network side is receiving terminal; Descending test is network side and to test terminal movably, sends audio signal, and now the audio transmission module of network side is transmitting terminal, and the audio transmission module of test terminal is receiving terminal.Network side and test terminal are all provided with audio transmission module, so just can carry out respectively or simultaneously up test and descending test.
The 8th preferred embodiment of the present invention is to improve on the basis of above-mentioned the 7th preferred embodiment, and this device also comprises:
Audio analysis module, described audio analysis module is determined the audio frequency period wherein occurring in handoff procedure;
Handover delay computing module, the inconsistent time span Tv of the predeterminated frequency of the audio signal of the characteristic audio signal that described handover delay computing module receives and transmitting terminal transmitting
i, as handover delay.
The 9th preferred embodiment of the present invention is to improve on the basis of above-mentioned the 8th preferred embodiment, and described data analysis module comprises:
Filter module, described filter module forms filter according to the time of hand off signaling;
Migration factor computing module, described migration factor computing module, according to the clock difference between test terminal and network side, arranges the migration factor of filter;
Described audio analysis module, according to the audio signal receiving, obtains occurring in the audio frequency period in handoff procedure by filter and the migration factor.
Migration factor computing module is to arrange in order to distinguish the audio frequency period which occurs in handoff procedure.Because the clock of receiving terminal and transmitting terminal may have deviation, particularly when terminal is as receiving terminal, therefore likely transmitting terminal record is the switching occurring at the 0th second, and receiving terminal clock has been indicated as the 4th second, now receiving terminal carries out the wrong reservation receiving terminal of the filtration meeting audio signal of the 0th second according to the signaling time of transmitting terminal, and the receiving terminal audio signal of the 4th second is omitted, filtration makes the mistake.In order to improve the accuracy of test, the clock of receiving terminal relatively need to be obtained to the migration factor according to the system clock of network side.
In above-mentioned the 7th, eight, nine embodiment, the audio signal frequency of transmission can be simply the dual-tone multifrequency test signal of f1+f2.In the audio signal receiving in receiving terminal analysis like this, characteristic is not equal to the time span Tv of f1+f2
i, can obtain Audio conversion time delay.Meanwhile, those skilled in that art are appreciated that the test signal that also can adopt multitone multifrequency.
Meanwhile, tenth embodiment of the invention is mobile communication switch course sound intermediate frequency handover delay method of testing, comprising:
Switch in minizone step I, test terminal, sends continuously audio-frequency test signal between test terminal and the audio transmission module of network side;
Step II, receiving terminal receive after audio-frequency test signal, according to the predeterminated frequency of the audio signal of the characteristic audio signal receiving, transmitting terminal transmitting, calculate handover delay Tv
i.
Because test is to occur between test terminal and network side, therefore can be divided into up test and descending test.Up test is movably test terminal and sends audio signal to network side, and now the audio transmission module of test terminal is transmitting terminal, and the audio transmission module of network side is receiving terminal; Descending test is network side and to test terminal movably, sends audio signal, and now the audio transmission module of network side is transmitting terminal, and the audio transmission module of test terminal is receiving terminal.Network side and test terminal are all provided with audio transmission module, so just can carry out respectively or simultaneously up test and descending test.
The 11 preferred embodiment of the present invention is to improve on the basis of above-mentioned the tenth preferred embodiment, and described Step II is specially:
Step II a, receiving terminal form filter according to the time of hand off signaling;
Step II b, according to the clock difference between test terminal and network side, the migration factor of filter is set;
Step II c, according to filter and the migration factor, obtain occurring in the audio frequency period while switching, and calculate the wherein time span of characteristic audio-frequency test signal predeterminated frequency, and calculate handover delay Tvi according to this time span.
The migration factor is to arrange in order to distinguish the audio frequency period which occurs in handoff procedure.Because the clock of receiving terminal and transmitting terminal may have deviation, particularly when terminal is as receiving terminal, therefore likely transmitting terminal record is the switching occurring at the 0th second, and receiving terminal clock has been indicated as the 4th second, now receiving terminal carries out filtration meeting the audio signal omission that is recorded as the 4th second occurring in handoff procedure according to the signaling time of transmitting terminal.Therefore likely transmitting terminal record is the switching occurring at the 0th second, and receiving terminal clock has been indicated as the 4th second, now receiving terminal carries out the wrong reservation receiving terminal of the filtration meeting audio signal of the 0th second according to the signaling time of transmitting terminal, and the receiving terminal audio signal of the 4th second is omitted, filtration makes the mistake.In order to improve the accuracy of test, the clock of receiving terminal relatively need to be obtained to the migration factor according to the system clock of network side.
In above-mentioned the tenth, 11 embodiment, the audio signal frequency of transmission can be the dual-tone multifrequency test signal of f1+f2.In the audio signal receiving in receiving terminal analysis like this, characteristic is not equal to the time span Tvi of f1+f2, can obtain Audio conversion time delay.Meanwhile, those skilled in that art are appreciated that the test signal that also can adopt multitone multifrequency.
Although; the present invention clearly demonstrates by above embodiment and accompanying drawing thereof; but in the situation that not deviating from spirit of the present invention and essence thereof; person of ordinary skill in the field is when making according to the present invention various corresponding variations and correction, but these corresponding variations and correction all should belong to the protection range of claim of the present invention.
Claims (2)
1. a testing apparatus for mobile communication switch course sound intermediate frequency handover delay, is characterized in that, comprising:
Movably test terminal, described test terminal can between community, switch and with network side communication;
Audio transmission module, described audio transmission module is arranged at respectively described test terminal and described network side, sends the audio signal of preset frequency between described network side and the audio transmission module of test terminal;
Filter module, described filter module forms filter according to the time of hand off signaling;
Migration factor computing module, described migration factor computing module, according to the clock difference between the audio transmission module of received audio signal and network side, arranges the migration factor of filter;
Audio analysis module, described audio analysis module is determined the audio frequency period wherein occurring in handoff procedure; Described audio analysis module, according to the audio signal receiving, obtains occurring in the audio frequency period in handoff procedure by filter and the migration factor;
Handover delay computing module, the predeterminated frequency of the characteristic audio signal that described handover delay computing module receives according to receiving terminal audio transmission module and the audio signal of transmitting, calculates both inconsistent time span Tv
i, as handover delay; Wherein i is the numbering of this time switching.
2. a mobile communication switch course sound intermediate frequency handover delay method of testing, comprising:
Switch in minizone step I, test terminal, sends continuously audio-frequency test signal between test terminal and the audio transmission module of network side;
Step II, receiving terminal receive after audio-frequency test signal, according to the predeterminated frequency of the audio signal of the characteristic audio signal receiving and transmitting, calculate handover delay Tv
i; Wherein i is the numbering of this time switching;
Wherein, described Step II is specially:
Step II a, receiving terminal form filter according to the time of hand off signaling;
Step II b, according to the clock difference between test terminal and network side, the migration factor of filter is set;
Step II c, according to filter and the migration factor, obtain occurring in the audio frequency period while switching, and calculate characteristic audio signal wherein and do not meet the time span Tv of predeterminated frequency
i, as handover delay.
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|---|---|---|---|
| CN201110090207.9A CN102123433B (en) | 2008-08-18 | 2008-08-18 | Device and method for testing switch time relay during mobile communication handover process |
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| CN201110090207.9A CN102123433B (en) | 2008-08-18 | 2008-08-18 | Device and method for testing switch time relay during mobile communication handover process |
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Effective date of registration: 20151208 Address after: 100045 Beijing city Xicheng District Yuetan Nan Street 11 Patentee after: Research Institute of Telecommunications Transmission, Ministry of Industry and Information Technology Patentee after: Beijing Rite Telecommunications Technological Company Address before: 100045 Beijing city Xicheng District Yuetan Nan Street 11 Patentee before: Research Institute of Telecommunications Transmission, Ministry of Industry and Information Technology |