CN101483497B - Data transmission system, receiving terminal and data packet recovery method thereof - Google Patents
Data transmission system, receiving terminal and data packet recovery method thereof Download PDFInfo
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- CN101483497B CN101483497B CN 200810204616 CN200810204616A CN101483497B CN 101483497 B CN101483497 B CN 101483497B CN 200810204616 CN200810204616 CN 200810204616 CN 200810204616 A CN200810204616 A CN 200810204616A CN 101483497 B CN101483497 B CN 101483497B
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Abstract
The present invention provides a data transmission system used for transmitting television signal, a receiving end and a data package recovering method thereof, wherein the data package recovering method comprises the steps of: dividing the television signal to be transmitted to a plurality of data blocks by the transmitting end, and adding characteristic serial numbers into the data blocks for forming a plurality of data packages; detecting the received data package by the receiving end, and confirming the lost data package according to the characteristic serial numbers in the data package; and substituting the lost data package by the data package adjacent with the characteristic serial number of lost data package by the receiving end according to the relativity between the data packages, wherein the characteristic serial number comprises the data style of data package, the affiliated frame and/or field, and the position information of corresponding data block in the affiliated frame and/or field. Therefore the invention can recover the lost data with a simple substitution mode. Furthermore the complexity of system can be relatively reduced and the load of transmission channel is alleviated.
Description
Technical field
The present invention relates to the data packet recovery technology, particularly be applied to the data transmission system of TV signal and receiving terminal thereof, data packet recovery method.
Background technology
In the analog television transmission system, with a two field picture be divided into very, the idol two scan.When transmitting television signals, each two field picture is divided into several blocks, for example 16 * 16 or 25 * 25, and in each block, insert sequence number, and forming packet, described sequence number is the serial number that forms according to time shaft.When transmission, promptly be that the described packet that has sequence number is passed through transmitting terminal, for example television transmitting tower is orderly sent to receiving terminal, for example television receiver.After receiving terminal receives described packet,, restore TV signal through the arrangement rearrangement.
But because TV signal can be subjected to transmission channel, for example on-air radio channel or cable channel, restriction, be easy to take place the problem of data-bag lost or delay.
Packet can cause phenomenons such as audio frequency pause, video flower screen and sound, video stop if packet loss takes place.For overcoming the deterioration of the TV sound picture that packet loss causes, generally when receiving terminal has detected packet loss, determine the packet lost to recover the described packet of losing by the redundant correcting method then according to sequence number.
But, owing to when adopting the redundant correcting method, need raw data packets to be divided into groups, and in each grouping, add steps such as redundant data or redundant data packets in the transmitting terminal execution, at receiving terminal then is the processing of having carried out a contrary, with redundant data decoding and the processing that receives.Redundant data generally all needs to adopt certain algorithm, and interleaving technology has for example proposed higher requirement to the level of integrated system and the disposal ability thereof of transmitting terminal and receiving terminal, has increased the complexity and the cost of transmitting terminal and receiving terminal.In addition, the limited bandwidth of the transmission channel of anolog TV signals, if in transmission course, transmitting terminal is except the TV signal (comprising vision signal and audio signal) of itself, also need transmit the redundant data (bag) that is used for error correction, additionally increase the weight of the burden of transmission channel so virtually, will certainly influence the transmittability of transmission channel.Again further; the size of redundant data (bag) is actually directly proportional with its error correcting capability; required error correcting capability is strong more; the TV signal reproducibility is better, and the data of redundant data (bag) are just many more, and its ratio shared in whole transmission data is just big more (relatively; the shared ratio of TV signal is just relatively more little); the efficiency of transmission of data is just had a greatly reduced quality, and the burden of transmission channel can be very heavy, and it is just longer to transmit the required time of a certain amount of TV signal.So again conversely, receiving terminal is had higher requirement the buffer that for example needs the receiving terminal configuration to have bigger storage volume again.
All this kind all is that we wish and can improve or avoid.
Summary of the invention
The problem that the present invention solves is that vision signal, the audio signal generation packet loss of TV signal in the prior art influences result of broadcast.
For addressing the above problem, the invention provides a kind of data transmission system, comprise transmitting terminal and receiving terminal, described transmitting terminal comprises: the packet generation unit, be used for TV signal waiting for transmission is divided into a plurality of data blocks, in described data block, add the feature sequence number forming a plurality of packets, described feature sequence number comprise the data type of packet, affiliated frame and/or and corresponding data block affiliated frame and/or in the information of position; Receiving terminal comprises: data packet detecting unit unit, be used to detect the packet that receives, and according to the feature sequence number in the packet, determine the packet of losing; The data packet recovery unit is used to utilize the correlation between the packet, uses the packet adjacent with the feature sequence number of the packet of losing to substitute the described packet of losing.
Alternatively, described TV signal is anolog TV signals, comprises vision signal and audio signal.
Alternatively, described packet is by sampling in regular turn on time shaft obtains to TV signal.
Specifically be included in the packet at the same position place in the packet on the adjacent display position in same frame and/or the field picture or consecutive frame and/or the image when alternatively, described adjacent packet is vision signal.
Alternatively, described receiving terminal also comprises: temporary storage location, and the packet that is used to receive is kept in; Packet arrangement unit is used for resequencing to the packet that receives or through the recovered data bag according to the feature sequence number; The packet reduction unit is used for all packets after recovering processing are reduced to original data block, to form TV signal.
The present invention provides the receiving terminal in a kind of data transmission system in addition, comprising: data packet detecting unit unit, be used to detect the packet that receives, and according to the feature sequence number in the packet, determine the packet of losing; The data packet recovery unit is used to utilize the correlation between the packet, uses the packet adjacent with the feature sequence number of the packet of losing to substitute the described packet of losing.
Specifically be included in the packet at the same position place in the packet on the adjacent display position in same frame and/or the field picture or consecutive frame and/or the image when alternatively, described adjacent packet is vision signal.
Alternatively, also comprise: temporary storage location, the packet that is used to receive is kept in; Packet arrangement unit is used for resequencing to the packet that receives or through the recovered data bag according to the feature sequence number; The packet reduction unit is used for all packets after recovering processing are reduced to original data block, to form TV signal.
The present invention provides a kind of data packet recovery method in addition, be applied to comprise in the television transmission system of transmitting terminal and receiving terminal, described data packet recovery method comprises: transmitting terminal is divided into a plurality of data blocks with TV signal waiting for transmission, in described data block, add the feature sequence number forming a plurality of packets, described feature sequence number comprise the data type of packet, affiliated frame and/or and corresponding data block affiliated frame and/or in the information of position; Receiving terminal detects the packet that receives, and according to the feature sequence number in the packet, determines the packet of losing; Receiving terminal utilizes the correlation between the packet, uses the packet adjacent with the feature sequence number of the packet of losing to substitute the described packet of losing.
Alternatively, described TV signal is anolog TV signals, comprises vision signal and audio signal.
Alternatively, described packet is by sampling in regular turn on time shaft obtains to TV signal.
Specifically be included in the packet at the same position place in the packet on the adjacent display position in same frame and/or the field picture or consecutive frame and/or the image when alternatively, described adjacent packet is vision signal.
Alternatively, also comprise at described receiving terminal: the packet that receives is kept in; Resequence to the packet that receives or through the recovered data bag according to the feature sequence number; To be reduced to original data block through all packets after recovering processing, to form TV signal.
Compared with prior art, technique scheme is to add the feature sequence number in the packet of TV signal, described feature sequence number comprises the data type of packet, affiliated frame and/or field, and the information of the position of corresponding data block in affiliated frame and/or field, like this, just can so that receiving terminal according to described feature sequence number, substitute the described packet of losing with the packet adjacent with the feature sequence number of the packet of losing, nationality is to restore TV signal, the present invention can not only satisfy the requirement of restore data, more the low complex degree of feasible system and the load that alleviates transmission channel.
Description of drawings
Fig. 1 has shown data transmission system of the present invention structural representation in one embodiment;
Fig. 2 has shown data packet recovery method of the present invention schematic flow sheet in one embodiment;
Fig. 3 is for carrying out the schematic diagram of the data packet recovery of vision signal in a specific embodiment according to data packet recovery method shown in Figure 2.
Embodiment
The inventor finds, in the transmission technology of existing TV signal, the redundant correcting methods that adopt are come recovery data packets more, but the redundant data packets that increases can produce the efficiency of transmission that reduces data, increase the load of transmission channel, and to the system complexity of transmitting terminal and receiving terminal problem such as have relatively high expectations.
The present invention provides the recovery technology of a kind of transfer of data and packet thereof, mainly is that transmitting terminal adds the feature sequence number with multi-level identification information in each packet; Receiving terminal utilizes the correlation between the packet, uses the packet adjacent with the feature sequence number of the packet of losing to substitute the described packet of losing, and with the data that simple alternative recovery is lost, improves TV signal, promotes audio-visual result of broadcast.
Below in conjunction with accompanying drawing content of the present invention is elaborated.
Fig. 1 has shown data transmission system of the present invention structural representation in one embodiment.As shown in Figure 1, described data transmission system comprises transmitting terminal 10 and receiving terminal 12.
Transmitting terminal 10 further comprises packet generation unit 100.Packet generation unit 100 is to be used for TV signal waiting for transmission is divided into a plurality of data blocks, and in each data block, add the feature sequence number to form a plurality of packets, wherein, described TV signal is anolog TV signals, includes vision signal and audio signal.Described feature sequence number comprise the data type of packet, affiliated frame and/or and corresponding data block affiliated frame and/or in the information of position.
With the vision signal is example, in the analog television transmission system, with a two field picture be divided into very, the idol two scan, and with each frame and/or image segmentation be several data blocks, be a base unit for example with pixel 16 * 16 or 25 * 25, and in each data block, insert the feature sequence number, form the packet of vision signal.In the present embodiment, described feature sequence number can be set at the structure of AA-BB-CC, and wherein AA can be used for representing the data type of packet, for example represents vision signal with V, in like manner, represents audio signal with A; BB can be used for representing frame and/or the field that packet is affiliated; And CC can represent the position of data block in aforesaid frame and/or field of described packet correspondence, and in fact, CC adopts coordinate form to represent, also can adopt serial number to represent.By way of example, in one embodiment, be initial point with the upper left corner of image, the width of image is as abscissa, the height of image is as ordinate, and like this, the position of the data block of described packet correspondence in aforesaid frame and/or field promptly can coordinate form be represented.In another embodiment, the a plurality of data block serial numbers that image in one frame and/or the field can be cut apart, for example with the data block open numbering in the upper left corner of image, for example be numbered 0, and according to from left to right, serial number from up to down, be numbered 1,2 ..., the data block until the lower right corner of image.Because described feature sequence number has multi-level structural design, make the layout science more of packet, its location is more accurate.
What need to specify is, the structure of AA-BB-CC only is an exemplary illustration in the above-mentioned feature sequence number, and for example AA does not wherein represent only to comprise two or be at most two, and is not to be defined in English alphabet.In fact, the AA part according to concrete situation, can include (many) positions arbitrarily, and to comprise the multiple expression way of numeral, letter or spcial character etc.Other BB part or CC part also should be applicable to the explanations of above-mentioned AA part.
Correspondingly, for audio signal, its packet also can adopt the feature sequence number with same characteristic features.But, need to prove, under some situation, for example in the TV signal of synchronization, may have only vision signal and do not have audio signal, this, in the present embodiment, in order to make the packet of vision signal and the packet of audio signal on the feature sequence number, keep consistency, be still by TV signal is taken a sample on time shaft in regular turn and obtain the packet of audio signal, and the packet of described audio signal is added the feature sequence number.Therefore, the data in the packet of some audio signal just may be sky.
Receiving terminal 12 further comprises temporary storage location 120, packet arrangement unit 122, data packet detecting unit unit 124, data packet recovery unit 126 and packet reduction unit 128.
Data packet detecting unit unit 124 is used to detect the packet that receives, and according to the feature sequence number in the packet, determines the packet of losing; Owing to carried out serial number at 10 pairs of original packets of transmitting terminal, added the feature sequence number, if data packet detecting unit unit 124 finds after testing: in the middle of the packet that receiving terminal 12 receives is found by 122 rearrangement backs, packet arrangement unit discontinuous situation is arranged, perhaps total number of the packet of total number of the packet received of receiving terminal 12 and transmitting terminal 10 transmissions is inconsistent.At this moment, can decision data wrap in and taken place in the transmission course to lose, and can to determine to lose be the packet of which feature sequence number.
Data packet recovery unit 126 is used to utilize the correlation between the packet, uses the packet adjacent with the feature sequence number of the packet of losing to substitute the described packet of losing.Packet with vision signal is an example, utilizes the strong correlation between adjacent image, by the packet of the adjacent data bag place of lost of strong correlation.Specifically comprise: in one embodiment, be will the packet on the adjacent display position substitutes the described packet of losing in same frame and/or the field picture being in the described packet of losing, for example, the periphery (packet of the locational data block correspondence in for example adjacent upper and lower, left and right) that is positioned at the data block position of described packet correspondence of losing can be substituted.In another embodiment, be to substitute the described packet of losing with the packet that the described packet of losing is in the same position place in consecutive frame and/or the field picture, for example, the packet identical with described packet position of losing substitutes in former frame that can the frame at described packet place of losing and/or field picture is adjacent and/or field picture or back one frame and/or the field picture.
Fig. 2 has shown data packet recovery method of the present invention schematic flow sheet in one embodiment.As shown in Figure 2, described data packet recovery method comprises the steps:
In step S200, receiving terminal is divided into a plurality of data blocks with TV signal waiting for transmission, in described data block, add the feature sequence number forming a plurality of packets, described feature sequence number comprise the data type of packet, affiliated frame and/or and corresponding data block affiliated frame and/or in the information of position.
With the vision signal is example, in the analog television transmission system, with a two field picture be divided into very, the idol two scan, and with each frame and/or image segmentation be several data blocks, and in each data block, insert the feature sequence number, form the packet of vision signal.In the present embodiment, described feature sequence number can be set at the structure of AA-BB-CC, and wherein AA can be used for representing the data type of packet, for example represents vision signal with V, in like manner, represents audio signal with A; BB can be used for representing frame and/or the field that packet is affiliated; And CC can represent the position of data block in aforesaid frame and/or field of described packet correspondence.
Like this, these packets that have a feature sequence number just by transmitting terminal by transmission channel, for example on-air radio channel or cable channel, broadcasting is gone out.
In step S202, receiving terminal detects the packet that receives, and according to the feature sequence number in the packet, determines the packet of losing.
In fact, can also be before packet is detected earlier to these packet rearrangements, described ordering is to carry out according to the feature sequence number of described packet.
In the present embodiment, carry out in the testing process finding if detect: in the middle of the packet that receiving terminal receives is found by 122 rearrangement backs, packet arrangement unit discontinuous situation is arranged, perhaps total number of the packet received of receiving terminal is inconsistent with total number of the packet of transmitting terminal transmission.At this moment, can decision data wrap in and taken place in the transmission course to lose, and can to determine to lose be the packet of which feature sequence number.
In step S204, receiving terminal utilizes the correlation between the packet, uses the packet adjacent with the feature sequence number of the packet of losing to substitute the described packet of losing.
Packet with vision signal is an example, utilizes the strong correlation between adjacent image, by the packet of the adjacent data bag place of lost of strong correlation.Specifically comprise: in one embodiment, be the packet on the adjacent display position substitutes the described packet of losing in same frame and/or the field picture being in the described packet of losing.In another embodiment, be that the packet that will be in the same position place in consecutive frame and/or the field picture with the described packet of losing substitutes the described packet of losing.
By above steps, the packet that those can be lost is recovered.
Follow-up, for the demonstration of image, can also comprise data recovered bag and before packet together put in order and resequence after all packets be reduced to original data block, and then form TV signal and on display unit, shown.
Come the data packet recovery of the vision signal in a certain specific embodiment is described in detail below in conjunction with data transmission system provided by the present invention and data packet recovery method.
Continuous two two field picture a and the b that transmission is arranged in the TV signal as shown in Figure 3.At first, described two two field picture a and b are divided into a plurality of data blocks, in described data block, add the feature sequence number to form a plurality of packets at transmitting terminal.For example each two field picture can be divided into 8 * 6 little data blocks, in each data block, add the feature sequence number and form packet.Like this, for image a, the feature sequence number of the packet of its each data block correspondence is respectively V-a-1, V-a-2 ..., V-a-48; For image b, the feature sequence number of the packet of its each data block correspondence is respectively V-b-1, V-b-2 ..., V-b-48.In fact, also can adopt coordinate form to represent, for example, adopt coordinate form can be expressed as V-a-5:4, represent that it is in the 5th row the 4th row for the packet of V-a-29 for the serial number of packet in image.In following narration, for embodying advantage of the present invention, we will describe with the characteristic sequence of coordinate mode.
Like this, these packets that have a feature sequence number just by transmitting terminal by transmission channel, for example on-air radio channel or cable channel, broadcasting is gone out.
At receiving terminal, at first receive these packets and it is kept in, and to these packets rearrangements.Suppose that the packet after the rearrangement is V-a-5:2, V-a-5:3, V-a-5:5, V-a-5:6, the packet V-a-5:4 in the middle of finding no after testing at this moment, can take place to lose by specified data bag V-a-5:4.
Utilize the strong correlation between adjacent image, by the packet of the adjacent data bag place of lost of strong correlation.For the packet V-a-5:4 that loses, in one embodiment, can substituting with the packet on the adjacent display position in the same two field picture, is V-a-5:3 with the feature sequence number promptly, V-a-6:4, the packet of V-a-5:5 or V-a-4:4 substitutes, but not as limit, also can substitute with other contiguous packets, for example, the V-a-4:3 of packet V-a-5:4 edge, V-a-6:3, V-a-6:5 or V-a-4:5 substitute.In another embodiment, also can be that the packet that will be in the same position place in consecutive frame and/or the field picture with the described packet of losing substitutes the described packet of losing, promptly come alternate data bag V-a-5:4 for the V-b-5:4 packet with feature sequence number in one two field picture of back, equally can recovery data packets.
Follow-up, for the demonstration of image, can also comprise data recovered bag and before packet together put in order and resequence after all packets be reduced to original data block, and then form TV signal and on display unit, shown.
In sum, technique scheme is that transmitting terminal adds the feature sequence number in the packet of TV signal, described feature sequence number comprise the data type of packet, affiliated frame and/or and corresponding data block affiliated frame and/or in the information of position; Then, receiving terminal can be according to the definite packet of losing of described feature sequence number, and use the packet adjacent to substitute the described packet of losing with the feature sequence number of the packet of losing, nationality is to restore TV signal, satisfy the requirement of restore data, improve TV signal, promote audio-visual result of broadcast.
Also it should be noted that, use data transmission system provided by the present invention and data packet recovery method, also can be in order to solve vision signal and the nonsynchronous problem of audio signal in the TV signal.For example, receiving terminal is worked as a plurality of continuous data bag V-b-1 that detect received vision signal in a period of time, V-b-2, V-b-3 and V-b-4, and the packet of the audio signal that receives is continuous A-b-1 and A-b-2, and do not detect the packet A-b-3 and the A-b-4 of follow-up audio signal, the feature sequence number of vision signal and audio signal is all continuous, but the quantity of the two is inconsistent, and at this moment, promptly decidable vision signal and audio signal have taken place asynchronous.For asynchronous, receiving terminal can be handled packet V-b-1, the V-b-2 of paid-in vision signal and packet A-b-1, the A-b-2 of audio signal earlier earlier, after treating that the packet A-b-3 of audio signal and A-b-4 receive, packet V-b-3 and the V-b-4 with before vision signal handles again.So just can solve nonsynchronous problem.
In addition, since the feature sequence number that in the technical program, adopts comprise the data type of packet, affiliated frame and/or and corresponding data block affiliated frame and/or in the information of position, make detection, the location of packet reach alternative very facility, come recovery data packets according to the feature sequence number by alternative, needing in the existing redundant correcting technology can avoid a large amount of redundant data (bag) of transmission to cause that data transmission efficiency is low, transmission channel is congested and require transmitting terminal and receiving terminal has problems such as high integration degree.
Though oneself discloses the present invention as above with preferred embodiment, the present invention is defined in this.Any those skilled in the art without departing from the spirit and scope of the present invention, all can do various changes and modification, so protection scope of the present invention should be as the criterion with claim institute restricted portion.
Claims (10)
1. a data transmission system comprises transmitting terminal and receiving terminal, it is characterized in that, described transmitting terminal comprises:
The packet generation unit, be used for TV signal waiting for transmission is divided into a plurality of data blocks, in each data block, add the feature sequence number forming a plurality of packets, described feature sequence number comprise the data type of packet, affiliated frame and/or and corresponding data block affiliated frame and/or in the information of position;
Receiving terminal comprises:
Data packet detecting unit unit is used to detect the packet that receives, and according to the feature sequence number in the packet, determines the packet of losing;
The data packet recovery unit, be used to utilize the correlation between the packet, substitute the described packet of losing with the packet adjacent with the feature sequence number of the packet of losing, described adjacent packet specifically is included in the packet at the same position place in the packet on the adjacent display position in same frame and/or the field picture or consecutive frame and/or the image when being vision signal.
2. data packet transmission according to claim 1 system is characterized in that described TV signal is anolog TV signals, comprises vision signal and audio signal.
3. data packet transmission according to claim 1 system is characterized in that, described packet is by sampling in regular turn on time shaft obtains to TV signal.
4. data transmission system according to claim 1 is characterized in that, described receiving terminal also comprises:
Temporary storage location, the packet that is used to receive is kept in;
Packet arrangement unit is used for resequencing to the packet that receives or through the recovered data bag according to the feature sequence number;
The packet reduction unit is used for all packets after recovering processing are reduced to original data block, to form TV signal.
5. the receiving terminal in the data transmission system is characterized in that, comprising:
Data packet detecting unit unit is used to detect the packet that receives, and according to the feature sequence number in the packet, determines the packet of losing; Described feature sequence number comprise the data type of packet, affiliated frame and/or and corresponding data block affiliated frame and/or in the information of position;
The data packet recovery unit, be used to utilize the correlation between the packet, substitute the described packet of losing with the packet adjacent with the feature sequence number of the packet of losing, described adjacent packet specifically is included in the packet at the same position place in the packet on the adjacent display position in same frame and/or the field picture or consecutive frame and/or the image when being vision signal.
6. receiving terminal according to claim 5 is characterized in that, also comprises:
Temporary storage location, the packet that is used to receive is kept in;
Packet arrangement unit is used for resequencing to the packet that receives or through the recovered data bag according to the feature sequence number;
The packet reduction unit is used for all packets after recovering processing are reduced to original data block, to form TV signal.
7. a data packet recovery method is applied to comprise in the television transmission system of transmitting terminal and receiving terminal, and it is characterized in that, described data packet recovery method comprises:
Transmitting terminal is divided into a plurality of data blocks with TV signal waiting for transmission, in each data block, add the feature sequence number forming a plurality of packets, described feature sequence number comprise the data type of packet, affiliated frame and/or and corresponding data block affiliated frame and/or in the information of position;
Receiving terminal detects the packet that receives, and according to the feature sequence number in the packet, determines the packet of losing;
Receiving terminal utilizes the correlation between the packet, substitute the described packet of losing with the packet adjacent with the feature sequence number of the packet of losing, described adjacent packet specifically is included in the packet at the same position place in the packet on the adjacent display position in same frame and/or the field picture or consecutive frame and/or the image when being vision signal.
8. data packet recovery method according to claim 7 is characterized in that described TV signal is anolog TV signals, comprises vision signal and audio signal.
9. data packet recovery method according to claim 7 is characterized in that, described packet is by sampling in regular turn on time shaft obtains to TV signal.
10. data packet recovery method according to claim 7 is characterized in that, also comprises at described receiving terminal:
The packet that receives is kept in;
Resequence to the packet that receives or through the recovered data bag according to the feature sequence number;
To be reduced to original data block through all packets after recovering processing, to form TV signal.
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| CN102186088A (en) * | 2011-05-04 | 2011-09-14 | 苏州两江科技有限公司 | Wireless sensor network (WSN) video transmission method based on interleave technology and secondary error-correction fusion |
| CN106899371B (en) * | 2015-12-18 | 2020-12-11 | 中兴通讯股份有限公司 | Time synchronization method and device |
| CN107147948A (en) * | 2017-05-15 | 2017-09-08 | 建荣半导体（深圳）有限公司 | Network image loses data reconstruction method, device, chip and storage device |
| CN108632565A (en) * | 2018-05-25 | 2018-10-09 | 苏州科达科技股份有限公司 | Transmission method, playback method, device and the conference facility of video code flow |
| CN112669858A (en) | 2019-10-14 | 2021-04-16 | 上海华为技术有限公司 | Data processing method and related device |
| CN110740045B (en) * | 2019-10-28 | 2021-04-16 | 支付宝(杭州)信息技术有限公司 | Instruction multicast method and system |
| CN115134434A (en) * | 2022-06-17 | 2022-09-30 | 奇安信科技集团股份有限公司 | Session connection monitoring method and device |
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| CN101102235A (en) * | 2007-07-26 | 2008-01-09 | 北京交通大学 | A method and device for measuring switching time |
| CN101296055A (en) * | 2007-04-29 | 2008-10-29 | 华为技术有限公司 | Data package dispatching method and device |
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| CN101296055A (en) * | 2007-04-29 | 2008-10-29 | 华为技术有限公司 | Data package dispatching method and device |
| CN101102235A (en) * | 2007-07-26 | 2008-01-09 | 北京交通大学 | A method and device for measuring switching time |
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