WO2013060229A1

WO2013060229A1 - Ip single-pass detection method and ip single-pass detection device

Info

Publication number: WO2013060229A1
Application number: PCT/CN2012/082610
Authority: WO
Inventors: 叶斌; 严凯; 王坤
Original assignee: 华为技术有限公司
Priority date: 2011-10-28
Filing date: 2012-10-09
Publication date: 2013-05-02
Also published as: CN102333016A; CN102333016B

Abstract

Embodiments of the present invention relate to an IP single-pass detection method and an IP single-pass detection device. The method of an embodiment of the present invention comprises: in a detection period, obtaining a serial number of a received first real-time transfer protocol frame, a serial number of a received last real-time transfer protocol frame and the total number of received packets; according to the serial numbers of the first and the last real-time transfer protocol frames, calculating the expected number of received frames in the detection period; according to the expected number of received frames and the total number of received packets, calculating a frame loss ratio in the detection period, and if a synchronization source symbol of the received real-time transfer protocol frame maintains unchanged, a jump value of the serial numbers of any two adjacent real-time transfer protocol frames is less than or equal to a jump threshold, the expected number of received frames is greater than or equal to a valid frame threshold, and the frame loss ratio is greater than or equal to a first single-pass detection threshold, judging that IP single-pass occurs in the detection period. The embodiments of the present invention can avoid erroneous judgment in IP single-pass detection caused by subjective feelings of a user.

Description

Method for detecting IP single pass and detecting device for IP single pass This application claims to be submitted to Chinese Patent Office on October 28, 2011, application number is 201110333614.8, and the invention name is "method for detecting IP single pass and detecting device for IP single pass" The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference.

Technical field

The invention relates to a method for detecting an IP (Internet Protocol, IP) single pass and a device for detecting an IP single pass.

Background technique

In an IP network, especially in an A-port IP network, sometimes a call encounters an IP single-pass problem. There are many reasons for IP single-pass. Sometimes the user's subjective feeling will affect the accuracy of IP single-pass detection results, resulting in misjudgment of IP single-pass detection. For example: During the muting period, 100% packet loss is detected, but this does not affect the user's subjective feeling. At this time, it is easy to cause IP single-pass detection misjudgment.

Summary of the invention

In various aspects of the present invention, a method for detecting an IP single pass and a detection device for an IP single pass are provided, and the method for detecting an IP single pass and the detecting device for an IP single pass can avoid IP single pass detection caused by subjective feeling of a user Misjudgment.

An aspect of the present invention provides a method for detecting an IP single pass, including a first detection method, where the first detection method includes: receiving a real-time transmission protocol frame in one detection period, and acquiring the first received a sequence number of the real-time transmission protocol frame, a sequence number of the last real-time transmission protocol frame, and a total number of received packets; calculating the detection period according to the sequence number of the first and last real-time transmission protocol frames Desiring the number of received frames; calculating a frame loss ratio in the detection period according to the expected number of received frames and the total number of received packets, if the received synchronization source flag of the real-time transmission protocol frame remains unchanged, and is received The sequence number hopping value of any two adjacent real-time transmission protocol frames is less than or equal to the hop threshold, and the expected number of received frames is greater than or equal to the effective frame threshold, and the frame loss ratio is greater than or equal to the first The single-pass detection threshold, the IP single-pass in the detection period. Another aspect of the present invention provides a method for detecting an IP single pass, comprising: obtaining a cumulative number of sent packets in a received first valid transmission report, where the first valid transmission report is a real-time transmission control protocol Sending a report; obtaining a cumulative number of sent packets in the received second valid transmission report, where the second valid transmission report is a transmission of the real-time transmission control protocol and adjacent to the first valid transmission report; Obtaining a total number of receivables in a time interval of the first and second valid transmission reports; calculating the first and second effective ones according to the accumulated number of packets in the first and second valid transmission reports The total number of packets sent in the interval during which the report is sent; the packet loss ratio is calculated according to the total number of packets sent and the total number of packets received. If the synchronization source flag of the received real-time transport protocol remains unchanged, the packet loss ratio is greater than Or equal to the single-pass detection threshold, and the total number of packets sent is greater than or equal to the threshold of the number of valid packets, the channel is single-passed.

A further aspect of the present invention provides an apparatus for detecting an IP single-pass, including a first detecting apparatus, where the first detecting apparatus includes: a first receiving module, configured to receive a real-time transport protocol frame within a detection period; a first extraction module, configured to extract a sequence number of a first real-time transmission protocol frame received by the first receiving module, a sequence number of a last real-time transmission protocol frame, and a total number of packets received in the detection period; a calculating module, configured to calculate, according to the sequence numbers of the first and last real-time transmission protocol frames, a desired number of received frames in the detection period, and further configured to use, according to the expected number of received frames, the total received number Calculating the frame loss ratio in the detection period, if the synchronization source flag of the real-time transmission protocol frame received by the first receiving module remains unchanged, and receiving any adjacent two real-time transmission protocol frames The sequence number hop value is less than or equal to the hop threshold, and the expected number of received frames is greater than or equal to the effective frame threshold, and the frame loss ratio is greater than or equal to A single-pass detection threshold, then the first detecting means determines said detection period IP single pass.

According to still another aspect of the present invention, there is provided an apparatus for detecting an IP single pass, comprising: a receiving module, configured to receive a transmission report of a first valid real-time transmission control protocol, and to be associated with the first valid transmission a sending report of the second effective real-time transmission control protocol of the neighboring; an extracting module, configured to extract the cumulative number of outgoing packets in the first and second valid sending reports, and the first and second valid sending 4 reports a total number of packets received in the time interval; a calculation module, configured to calculate a total time interval between the first and second valid transmission reports according to the cumulative number of packets sent in the first and second valid transmission reports The number of packets sent is also used to calculate a packet loss ratio according to the total number of packets sent and the total number of packets received; if the synchronization source flag of the report of the real-time transmission protocol received by the receiving module remains unchanged, the packet loss ratio is greater than or When the single-pass detection threshold is equal to, and the total number of packets sent is greater than or equal to the threshold of the number of valid packets, the detecting device determines the IP single-pass in the time interval. In the embodiment of the present invention, by setting the expected number of received frames to be greater than or equal to the effective frame threshold, or by setting the total number of outstanding packets to be greater than or equal to the effective number of packets, it is possible to avoid false positives of IP single-pass detection caused by subjective perception of the user. .

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

1 is a flow chart of a first embodiment of a method for detecting an IP single pass according to the present invention;

2 is a flow chart of a second embodiment of a method for detecting an IP single pass according to the present invention;

3 is a flow chart of a third embodiment of a method for detecting an IP single pass according to the present invention;

4 is a flowchart of a fourth embodiment of a method for detecting an IP single pass according to the present invention;

5 is a flowchart of a fifth embodiment of a method for detecting an IP single pass according to the present invention;

6 is a flowchart of a sixth embodiment of a method for detecting an IP single pass according to the present invention;

7 is a schematic diagram of a first embodiment of an apparatus for detecting an IP single pass according to the present invention;

8 is a schematic diagram of a second embodiment of an apparatus for detecting an IP single pass according to the present invention;

Fig. 9 is a schematic view showing a third embodiment of the apparatus for detecting an IP single-channel according to the present invention.

detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Embodiments of the present invention provide a method for detecting an IP single pass and a detecting device for an IP single pass. In the embodiment of the present invention, the single pass is a one-way call, and when the one-way call is expressed as a call, the other party's voice is not heard.

1 is a flow chart of a first embodiment of a method for detecting an IP single pass according to the present invention. The method in this embodiment can be applied to detecting a downlink IP single pass and an uplink IP single pass. When detecting the downlink IP single-pass, the local end is a base station controller (BSC), and the opposite end is a media gateway (Media GateWay, MGW) or a transcoder (TransCoder, TC) in the media gateway. Or another BSC; when used to detect the uplink IP single-pass, the local end is the BSC, and the opposite end is the base transceiver transceiver station (Base Transceiver Station, BTS). The method of this embodiment includes: Sll: Receive a real-time transport protocol frame in a detection period P, and obtain a serial number (Serial Number, SN) of the received Real-time Transport Protocol (RTP) frame.

SNi, the sequence number SN _{n of the} last RTP frame and the total number of received packets N. Specifically, the detection period P is configurable according to design requirements. Optionally, the unit of the detection period P is seconds.

S12: Calculate, according to the sequence numbers SNi, SN of the first and last RTP frames, the expected number of received frames in the detection period. Specifically, the expected number of received frames is

S13: Calculate a frame loss ratio in the detection period according to the expected number of received frames and the total number of received packets. Specifically, the frame loss ratio is 1 - ( ).

The same is true, and the hop value between the sequence numbers SN and SN _n of any two adjacent RTP frames received is less than or equal to the hop threshold, and the expected number of received frames is greater than or equal to the effective frame. The threshold, where the frame loss ratio is greater than or equal to the single-pass detection threshold, the IP single-pass in the detection period. Specifically, the effective frame threshold is P*MinNum, and the expected number of received frames is greater than or equal to the effective frame threshold, indicating that the valid voice frame is greater than a certain threshold to start IP single-pass detection, and is used to prevent less effective voice frames due to the peer end. The resulting local error detection. Further, the effective frame threshold is preferably less than or equal to P*MaxNum. If it exceeds, the possible value of the voice service is exceeded, and an abnormality may occur. The values of MinNum and MaxNum can be configured according to design requirements. Optionally, MinNum has a value of 20 and MaxNum has a value of 50. If the SSRC of the received RTP frame changes, or the hop value between the sequence numbers SN 8^! of any two adjacent RTP frames is greater than the hop threshold, the peer is considered to be switched. The IP single pass is no longer detected during the detection period, and the IP single pass continues to be detected in the next detection cycle. Optionally, the threshold of the hopping is 50. And if the expected number of received frames is smaller than the effective frame threshold, or the frame loss ratio is smaller than the single-pass detection threshold, ending the IP single-pass detection of the detection period.

The method for detecting an IP single-pass in this embodiment does not depend on whether the peer end supports Real-time Transport Control Protocol (RTCP), and prevents the cause by the setting of the expected number of received frames greater than or equal to the effective frame threshold. Local misdetection caused by fewer valid voice frames at the opposite end. In fact, if the number of packets sent by the peer is very small, the local end will not affect the normal call even if all the received packets are lost.

2 is a flow chart of a second embodiment of a method for detecting an IP single pass according to the present invention. This embodiment is a further description of the embodiment shown in FIG. 1. The method of this embodiment includes:

S21: Receive a real-time transmission protocol frame in a detection period, and obtain the first RTP received. The serial number of the frame, the serial number of the last RTP frame, and the total number of received packets. Specifically, the detection period P is configurable according to design requirements. Optionally, the unit of the detection period P is seconds.

S22: Calculate the expected number of received frames in the detection period according to the sequence number SN SN _{n of} the first and last RTP frames. Specifically, the expected number of received frames is SNn-SNi+L.

S23: Calculate a frame loss ratio in the detection period according to the expected number of received frames and the total number of received packets. Specifically, the frame loss ratio is 1 - ( ).

S24: determining whether the SSRC of the received RTP frame remains unchanged, if yes, executing step S25; if not, indicating that the peer end switches, and ending the IP single-pass detection of the current period. Step S24 can also be performed after step S21 or S22, and details are not described herein again.

S25: determining whether the sequence number hopping value of any two adjacent RTPs is less than or equal to the hopping threshold value, and if yes, executing step S26; if not, indicating that the peer end switches, ending the IP single pass of the current period Detection. Step S25 may also be performed after step S21 or S22, or may be performed before step S24, and details are not described herein again.

S26: Determine whether the expected number of received frames is greater than or equal to the effective frame threshold, and if yes, execute step S27; if not, end the IP single-pass detection of the current period. Step S26 can also be performed after step S22, and details are not described herein again. Specifically, the effective frame threshold is P*MinNum, and the expected number of received frames is greater than or equal to the effective frame threshold, indicating that the valid voice frame is greater than a certain threshold to start IP single-pass detection, and is used to prevent less effective voice frames due to the peer end. The resulting local error detection. Further, the effective frame threshold is preferably less than or equal to P*MaxNum. If it exceeds, the voice service may exceed the possible value of the voice service, and an abnormality may occur. The values of MinNum and MaxNum can be configured according to design needs. Optionally, MinNum has a value of 20 and MaxNum has a value of 50.

S27: Determine whether the frame loss ratio is greater than or equal to a single-pass detection threshold, and if yes, the IP single-pass in the detection period; if not, end the IP single-pass detection in the current period.

In this embodiment, the execution order of steps S24, S25, S26, and S27 can also be freely adjusted, and details are not described herein again.

3 is a flow chart of a third embodiment of a method for detecting an IP single pass according to the present invention. The method of this embodiment relies on the peer to support RTCP. The method in this embodiment is applicable to detecting a downlink IP single pass, where the local end is a BSC, and the opposite end is an MGW or a TC in the MGW or another BSC. Specifically, when the BSC receives the second valid report (Send Report, SR), it starts to detect whether the current valid SR is from the last valid SR period, and whether the IP is single-pass. This embodiment includes: S31: Acquire a cumulative number of sent packets in the received first valid SR, where the first valid SR is an SR of the RTCP.

S32: Acquire a cumulative number of sent packets in the received second valid SR, where the second valid SR is an SR of the RTCP and is adjacent to the first valid SR. Specifically, if the received SR is less than 5 seconds from the last SR, the SR is considered invalid. If it is 5 seconds, it is considered to be a valid SR.

S33: Acquire a total number of receivables in a time interval of the first and second valid SRs. Specifically, the interval between two consecutive valid SRs is n, and optionally, the time interval is in seconds.

S34: Calculate, according to the cumulative number of packets sent in the first and second valid SRs, the total number of packets sent in the time interval of the first and second valid SRs. Specifically, the total number of packets sent is the difference between the number of accumulated packets in the second valid SR and the number of accumulated packets in the first valid SR.

S35: Calculate the packet loss ratio according to the total number of packets sent and the total number of packets received. Specifically, the packet loss ratio is

Total number of receipts

- (the number of accumulated packets in the first valid SR - the number of accumulated packets in the first valid SR if the SSRC of the received RTCP report does not keep the packet loss ratio greater than or equal to the single pass detection threshold, and the total If the number of packets sent is greater than or equal to the threshold of the number of valid packets, the time interval is single-pass. Specifically, the threshold of the effective number of packets is n * MinNum, and the total number of packets is greater than or equal to the threshold of the number of valid packets, indicating that the effective voice frame is greater than a certain threshold. IP single-pass detection is enabled to prevent local misdetection due to fewer valid voice frames at the peer end. The value of the MinNum can be configured according to design requirements. Optionally, the MinNum value is 20.

If the SSRC of the RTCP report is changed, the peer is considered to be in the switch, and the IP single-pass is no longer detected in the time interval. If the packet loss ratio is less than the single-pass detection threshold, or the total number of packets sent is less than the effective number of packets, the IP single-pass detection in the interval is ended.

The method for detecting an IP single-pass in this embodiment relies on the peer to support RTCP. The total number of packets sent is calculated by the difference between the number of accumulated packets in the two adjacent valid SRs. By setting the total number of packets to be greater than or equal to the number of valid packets, the local end caused by fewer active voice frames at the peer is prevented. False detection.

4 is a flow chart of a fourth embodiment of a method for detecting an IP single pass according to the present invention. This embodiment is a further description of the embodiment shown in FIG. 3, and the method of the embodiment includes:

S41: Acquire a cumulative number of sent packets in the received first valid SR, where the first valid SR is an SR of the RTCP. S42: Acquire a cumulative number of sent packets in the received second valid SR, where the second valid SR is an SR of the RTCP and is adjacent to the first valid SR. Specifically, if the received SR is less than 5 seconds from the last SR, it is considered that the current SR is invalid, and if it is 5 seconds, it is considered to be a valid SR.

S43: Acquire a total number of packets in a time interval of the first and second valid SRs. Specifically, the interval between two consecutive valid SRs is n, and optionally, the time interval is in seconds.

S44: Calculate the total number of packets sent in the time interval of the first and second valid SRs according to the cumulative number of packets sent in the first and second valid SRs. Specifically, the total number of packets sent is the difference between the number of accumulated packets in the second valid SR and the number of accumulated packets in the first valid SR.

S45: Calculate the packet loss ratio according to the total number of packets sent and the total number of packets received. Specifically, the packet loss ratio is

Total number of receipts

— (cumulative number of packets in the first valid SR - number of accumulated packets in the first valid SR

S46: It is determined whether the SSRC of the received RTCP SR remains unchanged. If yes, step S47 is performed; if not, the peer end is switched, and the IP single-pass detection in the time interval is ended. Step S46 can also be performed after step S43 or S44, and details are not described herein again.

S47: Determine whether the total number of packets sent is greater than or equal to the threshold of the number of valid packets, and if yes, execute step S48; if not, end the IP single-pass detection in the interval. Specifically, the threshold of the effective number of packets is n * MinNum, and the total number of packets sent is greater than or equal to the threshold of the number of valid packets, indicating that the valid voice frame is greater than a certain threshold to initiate IP single-pass detection, which is used to prevent less effective voice frames due to the peer. The local error detection caused. The value of the MinNum can be configured according to the design needs, and optionally, the value of MinNum is 20. Step S47 can also be performed after step S43 or S44, and details are not described herein again.

S48: Determine whether the packet loss ratio is greater than or equal to a single-pass detection threshold, and if yes, the IP single-pass in the time interval; if not, end the IP single-pass detection in the time interval.

In this embodiment, the execution order of steps S46, S47, and S48 can also be freely adjusted, and details are not described herein.

FIG. 5 is a flow chart of a fifth embodiment of a method for detecting an IP single pass according to the present invention. The method for detecting an IP single-pass in this embodiment includes a first detecting method and a second detecting method, and the first and second detecting methods are performed in parallel. If the detection result of any one of the first and second detection methods is an IP single-pass, the detection result of the method for detecting the IP single-pass is an IP single-pass. After the local IP address is transmitted, the A-interface over IP (AoIP) downlink single-pass detection is not performed during the detection period. Specifically, the first Detection methods include:

S51: Receive a real-time transmission protocol frame in a detection period P, obtain the sequence number SNi of the received first RTP frame, the sequence number SN _{n of the} last RTP frame, and the total number of received packets N. Specifically, the detection period P is configurable according to design requirements. Optionally, the unit of the detection period P is seconds.

S52: Calculate, according to the sequence number SN SN of the first and last RTP frames, the expected number of received frames in the detection period. Specifically, the expected number of received frames is SNn-SNi+L.

S53: Calculate a frame loss ratio in the detection period according to the expected number of received frames and the total number of received packets. Specifically, the frame loss ratio is 1 - (- - -).

SN^ SN^ l If the SSRC of the received RTP frame remains unchanged, and the received hop value between the sequence numbers SN SN _n of any two adjacent RTP frames is less than or equal to the hop threshold, And the number of expected received frames is greater than or equal to the effective frame threshold, and the frame loss ratio is greater than or equal to the first single pass detection threshold, and the IP single pass in the detection period. Specifically, the effective frame threshold is P*MinNum, and the expected number of received frames is greater than or equal to the effective frame threshold, indicating that the valid voice frame is greater than a certain threshold to start IP single-pass detection, and is used to prevent less effective voice frames due to the peer end. The resulting local error detection. Further, the effective frame threshold is preferably less than or equal to P*MaxNum. If it exceeds, the possible value of the voice service is exceeded, and an abnormality may occur. The values of the MmNum and MaxNum can be configured according to design requirements. Optionally, the MinNum value is 20 and the MaxNum value is 50. If the SSRC of the received RTP frame changes, or the hop value between the sequence numbers SN SN _{n of} any two adjacent RTP frames is greater than the hop threshold, the peer is considered to be handed over. The IP single pass is no longer detected during the detection period, and the IP single pass continues to be detected in the next detection cycle. Optionally, the threshold of the hopping is 50. If the expected number of received frames is smaller than the effective frame threshold, or the frame loss ratio is smaller than the first single pass detection threshold, the IP single pass detection of the detection period is ended.

When the two SRs of the valid RTCP are received, the method for detecting the IP single-pass in this embodiment also starts the second detecting method, where the second detecting method includes:

S54: Acquire the cumulative number of issued packets in the first valid SR received.

S55: Acquire a cumulative number of sent packets in the received second valid SR, where the second valid SR is adjacent to the first valid SR. Specifically, if the received SR is less than 5 seconds from the last SR, the current SR is considered invalid, and if it is 5 seconds, it is considered to be a valid SR.

S56: Acquire a total number of packets in a time interval of the first and second valid SRs. specific, The interval between two consecutive valid SRs is n. Optionally, the time interval is in seconds.

S57: Calculate the total number of packets sent in the time interval of the first and second valid SRs according to the accumulated number of packets in the first and second valid SRs. Specifically, the total number of packets sent is the second effective one.

The difference between the number of accumulated packets in the SR and the number of accumulated packets in the first valid SR.

S58: Calculate the packet loss ratio according to the total number of packets sent and the total number of packets received. Specifically, the packet loss is

Total number of receipts

- (the number of accumulated packets in the first valid SR - the number of accumulated packets in the first valid SR. If the SSRC of the received RTCP report is inevitably inevitably the number of total packets is greater than or equal to the threshold of the number of valid packets, and the lost The packet ratio is greater than or equal to the second single-pass detection threshold, and the single-pass is within the time interval. Specifically, the effective packet number threshold is n * MinNum, and the total number of packets sent is greater than or equal to the effective number of packets to indicate that the effective voice frame is greater than A certain threshold is used to enable IP single-pass detection, which is used to prevent local erroneous detection caused by a small number of valid voice frames at the peer end. Specifically, the first and second single-pass detection thresholds may be configured according to design requirements. Optionally, the first single pass detection threshold is equal to the second single pass detection threshold.

In the method of this embodiment, the first detection method may be applicable to the case where the peer end supports and does not support the RTCP, so as to make up for the limitation that the second detection method is only applicable to support the use of the RTCP, and the second detection method can compensate for the limitation. The usage limitation that the first detection method cannot be detected in the case of 100% packet loss is described. Therefore, the detection result of the method for detecting IP single-channel in this embodiment is more accurate.

6 is a flow chart of a sixth embodiment of a method for detecting an IP single pass according to the present invention. This embodiment is a further description of the embodiment shown in FIG. 5. The method for detecting an IP single-pass in this embodiment includes a first detection method and a second detection method, and the first and second detection methods are performed in parallel. If the detection result of any one of the first and second detection methods is an IP single-pass, the detection result of the method for detecting the IP single-pass is an IP single-pass. Specifically, the first detecting method includes:

S601: Receive a real-time transmission protocol frame in a detection period, and obtain a sequence number of the first RTP frame received, a sequence number of the last RTP frame, and a total number of received packets. Specifically, the detection period P is configurable according to design requirements. Optionally, the unit of the detection period P is seconds.

S602: Calculate, according to the sequence numbers SNi, SN _{n of} the first and last RTP frames, the expected number of received frames in the detection period. Specifically, the expected number of received frames is SNn-SNi+L. S603: Calculate a frame loss ratio in the detection period according to the expected number of received frames and the total number of received packets. Specifically, the frame loss ratio is 1 - (- - - ).

S604: It is determined whether the SSRC of the received RTP frame remains unchanged, and if yes, step S605 is performed; if not, the peer end is switched, and the IP single-pass detection of the current period is ended. Step S604 can also be performed after step S601 or S602, and details are not described herein again.

S605: determining whether the sequence number hopping value of any two adjacent RTPs is less than or equal to the hopping threshold value, if yes, executing step S606; if not, indicating that the peer end switches, ending the IP single pass of the current period Detection. Step S605 can also be performed after step S601 or S602, or before step S604, and details are not described herein again.

S606: Determine whether the expected number of received frames is greater than or equal to the effective frame threshold, and if yes, execute step S607; if not, end the IP single-pass detection of the current period. Step S606 can also be performed after step S602, and details are not described herein again. Specifically, the effective frame threshold is P*MmNum, and the expected number of received frames is greater than or equal to the effective frame threshold, indicating that the valid voice frame is greater than a certain threshold to start IP single-pass detection, and is used to prevent less effective voice frames due to the peer end. The resulting local error detection. Further, the effective frame threshold is preferably less than or equal to P*MaxNum. If it exceeds, the voice service may exceed the possible value of the voice service, and an abnormality may occur. The values of MinNum and MaxNum can be configured according to design needs. Optionally, MinNum has a value of 20 and MaxNum has a value of 50.

S607: Determine whether the frame loss ratio is greater than or equal to the first single-pass detection threshold, and if yes, the IP single-pass in the detection period; if not, end the IP single-pass detection in the current period.

In this embodiment, the execution order of steps S604, S605, S606, and S607 can also be freely adjusted, and details are not described herein again.

The second detection method includes:

S607: Determine whether the first valid RTCP transmission report is received, and if yes, execute step S609; if no, execute S607 repeatedly.

S608: Determine whether the second valid RTCP transmission report is received, if yes, execute step S610, if no, execute S608 repeatedly. Specifically, if the received SR is less than 5 seconds from the last SR, the current SR is considered invalid, and if it is 5 seconds, it is considered to be a valid SR.

S610: Acquire the cumulative number of issued packets in the first valid SR received. Step S610 can also be performed after step S607, and details are not described herein again.

S611: Acquire the cumulative number of outstanding packets in the received second valid SR. S612: Acquire a total number of packets in a time interval of the first and second valid SRs. Specifically, the interval between two consecutive valid SRs is n, and optionally, the time interval is in seconds.

S613: Calculate, according to the cumulative number of packets sent in the first and second valid SRs, the total number of packets sent in the time interval of the first and second valid SRs. Specifically, the total number of packets sent is the difference between the number of accumulated packets in the second valid SR and the number of accumulated packets in the first valid SR.

S614: Calculate the packet loss ratio according to the total number of packets sent and the total number of packets received. Specifically, the packet loss ratio is

Total number of receipts

S615: Determine whether the SSRC of the received RTCP SR remains unchanged, and if yes, execute step S616; if not, it indicates that the peer end switches, and the IP single-pass detection in the time interval is ended. Step S615 can also be performed after any step in steps S608 to S613, and details are not described herein again.

S616: Determine whether the total number of packets sent is greater than or equal to the threshold of the number of valid packets, and if yes, execute step S617; if not, end the IP single-pass detection in the time interval. Specifically, the threshold of the effective number of packets is n * MinNum, and the total number of packets sent is greater than or equal to the threshold of the number of valid packets, indicating that the valid voice frame is greater than a certain threshold to initiate IP single-pass detection, which is used to prevent less effective voice frames due to the peer. The local error detection caused. The value of MinNum can be configured according to design needs, and optionally, the value of MinNum is 20. Step S616 can also be performed after step S612 or S613, and details are not described herein again.

S617: Determine whether the packet loss ratio is greater than or equal to the second single-pass detection threshold, and if yes, the IP single-pass in the time interval; if not, end the IP single-pass detection in the time interval. Optionally, the first single pass detection threshold is equal to the second single pass detection threshold.

In this embodiment, the execution order of steps S615, S616, and S617 can also be freely adjusted, and details are not described herein again.

Fig. 7 is a schematic view showing a first embodiment of the apparatus for detecting an IP single pass of the present invention. The apparatus of this embodiment can be adapted to detect a downlink IP single pass and an uplink IP single pass. When it is used to detect the downlink IP single-pass, the local end is the BSC, the opposite end is the MGW or the TC in the MGW or the other BSC; when used to detect the uplink IP single-pass, the local end is the BSC, and the opposite end is the BTS. .

The apparatus for detecting an IP single pass of this embodiment includes a receiving module 71, an extracting module 72, and a calculating module 73. The receiving module 71 is configured to receive an RTP frame of P in a detection period. The extraction module 72 is configured to extract the sequence number SN _n of the first RTP frame received by the receiving module 71 and the sequence number SN _n of the last RTP frame and the total number of packets N in the detection period. The calculating module 73 is configured to calculate, according to the sequence numbers of the first and last RTP frames, a desired number of received frames in the detection period, and further configured to: according to the expected number of received frames and the total received packet The number is calculated as the frame loss ratio during the detection period. Specifically, the expected number of received frames is SNn-SNi+1, and the frame loss ratio is

If the SSRC of the RTP frame received by the receiving module 71 remains unchanged, and the hop value between the sequence numbers SNi and SN _n of any two adjacent RTP frames received is less than or equal to the hop threshold. The IP single-pass detection device of the present embodiment determines the IP single-pass in the detection period, and the expected number of received frames is greater than or equal to the effective frame threshold, and the frame loss ratio is greater than or equal to the single-pass detection threshold. Specifically, the effective frame threshold is P*MinNum, and the expected number of received frames is greater than or equal to the effective frame threshold, indicating that the valid voice frame is greater than a certain threshold to start IP single-pass detection, and is used to prevent less effective voice frames due to the peer end. The resulting local error detection. Further, the effective frame threshold is preferably less than or equal to P*MaxNum. If it exceeds, the possible value of the voice service is exceeded, and an abnormality may occur. The values of MinNum and MaxNum can be configured according to design requirements. Optionally, MinNum has a value of 20 and MaxNum has a value of 50.

If the SSRC of the RTP frame received by the receiving module 71 is changed, or the hop value between the sequence numbers SN^8^ of any two adjacent RTP frames received is greater than the hopping threshold value, If the peer end is considered to be handed over, the IP single-pass detection in the time interval is ended. Optionally, the threshold is 50. If the expected number of received frames is smaller than the effective frame threshold, or the frame loss ratio is smaller than the single-pass detection threshold, the IP single-pass detection of the detection period is ended.

Further, the detecting device of the IP single-pass includes a determining module 74, configured to determine whether the SSRC of the RTP frame received by the receiving module 71 remains unchanged, and is used for determining any two adjacent RTPs received. Whether the hop value between the sequence numbers SNi and SN _{n of the} frame is less than or equal to the hop threshold value, and is used to determine whether the expected number of received frames is greater than or equal to the effective frame threshold, and is used to determine whether the frame loss ratio is Greater than or equal to the single pass detection threshold.

The apparatus for detecting an IP single-pass in this embodiment does not depend on whether the peer end supports the real-time transmission control protocol TCP, and prevents the number of valid frames to be received due to the fact that the number of expected received frames is greater than or equal to the effective frame threshold. The local side is detected by mistake.

Fig. 8 is a schematic view showing a second embodiment of the apparatus for detecting an IP single pass of the present invention. The device in this embodiment relies on the peer to support the RTCR. The device in this embodiment is applicable to detecting a downlink IP single pass, and the local end is a BSC. The opposite end is a TC or another BSC in the MGW or MGW.

The apparatus for detecting an IP single-channel according to this embodiment includes a receiving module 81, an extracting module 82, and a calculating module 83. The IP single-channel detection apparatus of this embodiment relies on the peer to support RTCP. Specifically, when the detecting device of the IP single-pass receives the second valid SR, it starts to start detecting, and detects whether the valid SR distance is the last valid SR period, and whether the IP is single-pass.

The receiving module 81 is configured to receive the SR of the first valid RTCP and the SR of the second valid RTCP adjacent to the first valid transmission report. Specifically, if the SR received by the receiving module 51 is less than 5 seconds from the last SR, the current SR is considered invalid, and if it is 5 seconds, it is considered to be a valid SR.

The extracting module 82 is configured to extract the cumulative number of packets sent in the first and second valid SRs and the total number of packets in the time interval of the first and second valid SRs. Specifically, the interval between two consecutive valid SRs is n, and optionally, the time interval is in seconds.

The calculating module 83 is configured to calculate, according to the cumulative number of packets sent in the first and second valid SRs, the total number of packets sent in the time interval of the first and second valid SRs, and further, according to the total The number of packets sent and the total number of packets are counted. Specifically, the total number of packets sent is the difference between the number of accumulated packets in the second valid SR and the number of accumulated packets in the first valid SR, and the packet loss ratio is

Total number of receipts

- (the number of accumulated packets in the first valid SR - the number of accumulated packets in the first valid SR) If the SSRC of the RTCP report received by the receiving module 81 remains unchanged, the packet loss ratio is greater than or equal to the single pass The threshold of the detection, and the total number of packets sent is greater than or equal to the threshold of the number of valid packets, the detection device of the IP single-pass in this embodiment confirms the single-pass in the time interval. Specifically, the threshold of the effective number of packets is n * MinNum If the total number of packets sent is greater than or equal to the number of valid packets, the IP address is greater than a certain threshold to enable IP single-pass detection, which is used to prevent local erroneous detection caused by fewer valid voice frames at the peer end. The value of the MinNum can be Configured according to design needs, optional, MinNum has a value of 20.

If the SSRC of the RTCP report received by the receiving module 81 changes, it is considered that the handover occurs at the opposite end, and the IP single-pass detection in the time interval is ended. If the packet loss ratio is less than the single-pass detection threshold, or the total number of packets sent is less than the effective packet number threshold, the IP single-pass detection in the time interval is ended.

Further, the detecting device of the IP single-pass includes a determining module 84, configured to determine whether the SSRC of the received RTCP report remains unchanged, and is used to determine whether the packet loss ratio is greater than or equal to a single The detection threshold is used to determine whether the total number of packets is greater than or equal to the threshold of the number of valid packets.

The apparatus for detecting an IP single-pass in this embodiment relies on the peer to support RTCP. The total number of packets sent is calculated by the difference between the number of accumulated packets in the two adjacent valid SRs. By setting the total number of packets to be greater than or equal to the number of valid packets, the local end caused by fewer active voice frames at the peer is prevented. False detection.

Fig. 9 is a schematic view showing a third embodiment of the apparatus for detecting an IP single-channel according to the present invention. The apparatus 900 for detecting an IP single pass of the present embodiment includes a first detecting means 901 and a second detecting means 906. If the detection result of any one of the first and second detecting devices 901, 906 is an IP single pass, the detection result of the detecting device 900 of the IP single pass is an IP single pass.

The first detecting device 901 includes a first receiving module 902, a first extracting module 903, and a first calculating module 904. The first receiving module 902 is configured to receive an RTP frame of P in a detection period. The first extraction module 903 is configured to extract a sequence number of the first RTP frame received by the first receiving module 902, a sequence number SN _{n of} the last RTP frame, and a total packet in the detection period. number

The first calculating module 904 is configured to calculate, according to the sequence numbers of the first and last RTP frames, a desired number of received frames in the detection period, and further, according to the expected number of received frames and the total The number of packets received calculates the frame loss ratio during the detection period. Specifically, the expected number of received frames is

SN _n -SNi+ 1, the frame loss ratio is

SN _n - SN, + if the SSRC of the RTP frame received by the first receiving module 902 remains unchanged, and the hop value between the sequence numbers SN1 and SNn of any two adjacent RTP frames received is less than Or equal to the hopping threshold, and the number of expected received frames is greater than or equal to the effective frame threshold, and the frame loss ratio is greater than or equal to the first single pass detection threshold, and the detecting device of the IP single pass of the embodiment determines Within the detection cycle

IP single pass. Specifically, the effective frame threshold is P*MinNum, and the expected number of received frames is greater than or equal to the effective frame threshold, indicating that the valid voice frame is greater than a certain threshold to start IP single-pass detection, and is used to prevent less effective voice frames due to the peer end. The resulting local error detection. Further, the effective frame threshold is preferably less than or equal to P*MaxNum. If it exceeds, the possible value of the voice service is exceeded, and an abnormality may occur. The values of the MinNum and the MaxNum may be configured according to the design requirements. Optionally, the value of the MinNum value of 2Q MaxNum is 5α. If the SSRC of the RTP frame received by the first receiving module 902 changes, or any received If the hop value between the sequence numbers SN1 and SNn of the two adjacent RTP frames is greater than the hop threshold, the peer is considered to be switched, and the IP is not detected in the detection period. Single-pass. Optionally, the threshold of the hopping is 50. If the expected number of received frames is less than the effective frame threshold, or the frame loss ratio is smaller than the first single pass detection threshold, the IP single pass detection of the detection period is ended.

Further, the first detecting device 901 further includes a first determining module 905, configured to determine whether the SSRC of the RTP frame received by the first receiving module 902 remains unchanged, and is used to determine any two phases received. Whether the hop value between the sequence numbers SN1 and SNn of the adjacent RTP frame is less than or equal to the hop threshold, and is used to determine whether the expected number of received frames is greater than or equal to the effective frame threshold, and is used to determine the frame loss. Whether the ratio is greater than or equal to the first single pass detection threshold.

The second detecting device 906 includes a second receiving module 907, a second extracting module 908, and a second calculating module 909. The second detecting means 906 relies on the peer to support RTCP. Specifically, when the detecting device 900 of the IP single-pass receives the second valid SR, the second detecting device 906 starts the detecting, and detects whether the current valid SR distance is the last valid SR period, whether IP Single-pass.

The second receiving module 907 is configured to receive the SR of the first valid RTCP and the SR of the second valid RTCP adjacent to the first valid sending report, if the second receiving module 907 receives If the SR is less than 5 seconds from the last SR, it is considered that the SR is invalid. If it is 5 seconds, it is considered to be a valid SR.

The second lifting block 908 is configured to extract the cumulative number of packets in the first and second valid SRs and the total number of packets in the time interval of the first and second valid SRs. Specifically, the interval between adjacent two valid SRs is η, and optionally, the time interval is in seconds.

The second calculating module 909 is configured to calculate, according to the cumulative number of packets sent in the first and second valid SRs, the total number of packets sent in the time interval of the first and second valid SRs, and The total number of packets sent and the total number of packets are counted to calculate the packet loss ratio. Specifically, the total number of packets sent is the difference between the number of accumulated packets in the second valid SR and the number of accumulated packets in the first valid SR, and the packet loss ratio is

Total number of receipts

- (the number of accumulated packets in the first valid SR - the number of accumulated packets in the first valid SR) ° If the SSRC of the RTCP report received by the second receiving module 907 remains unchanged, the packet loss ratio is greater than Or equal to the second single-pass detection threshold, and the total number of packets sent is greater than or equal to the threshold of the number of valid packets, the detecting device of the IP single-channel in this embodiment confirms the single-pass in the time interval. Specifically, the threshold of the effective number of packets is n * MmNum, and the total number of packets sent is greater than or equal to the threshold of the number of valid packets, indicating that the valid voice frame is greater than a certain threshold to initiate IP single-pass detection, which is used to prevent less effective voice frames due to the peer. The local error detection caused. The value of the MinNum can be configured according to design needs, optionally, MinNum has a value of 20.

If the SSRC of the RTCP report received by the second receiving module 907 changes, it is considered that the switching of the peer does not detect the IP single-pass in the detection period. If the packet loss ratio is smaller than the second single-pass detection threshold, or the total number of packets sent is less than the effective number of packets, the IP single-pass detection in the time interval is ended.

Further, the second detecting device 906 further includes a second determining module 910, configured to determine whether the SSRC of the RTCP report received by the second receiving module 907 remains unchanged, and is used to determine whether the packet loss ratio is greater than Or equal to the second single-pass detection threshold, used to determine whether the total number of packets sent is greater than or equal to the threshold of the number of valid packets.

In the detecting apparatus of this embodiment, the first detecting apparatus 901 may be adapted to support the peer end and not support the RTCP, thereby compensating for the use limitation that the second detecting apparatus 906 is only applicable to support RTCP, and the second The detecting device 906 can compensate for the usage limitation that the first detecting device 901 cannot detect when 100% of the packets are lost. Therefore, the detection result of the IP single-pass detecting device of the embodiment is more accurate.

The technical solution of the present invention may be embodied in the form of a software product in the form of a software product, or a part of the technical solution, which is stored in a storage medium, including a plurality of instructions. All or part of the steps of the method of the various embodiments of the present invention are performed by a computer device (which may be a personal computer, server, or network device, etc.). The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program code. .

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the embodiments are modified, or the equivalents of the technical features are replaced by the equivalents; and the modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Claim

A method for detecting an IP single pass, comprising: a first detecting method, wherein the first detecting method comprises:

Receiving a real-time transmission protocol frame in a detection period, obtaining a sequence number of the first real-time transmission protocol frame received, a sequence number of the last real-time transmission protocol frame, and a total number of received packets; And the sequence number of the last real-time transmission protocol frame, and calculating the expected number of received frames in the detection period;

Calculating a frame loss ratio in the detection period according to the expected number of received frames and the total number of received packets, if the synchronization source flag of the received real-time transmission protocol frame remains unchanged, and any adjacent ones received are received The sequence number hopping value of the two real-time transmission protocol frames is less than or equal to the hop threshold, and the expected number of received frames is greater than or equal to the effective frame threshold, and the frame loss ratio is greater than or equal to the first single-pass detection threshold. Then, the IP single pass in the detection period.

2. The method according to claim 1, wherein if the synchronization source flag of the received real-time transmission protocol frame is changed, or the received sequence number of any two adjacent real-time transmission protocol frames is greater than The hop threshold, or the number of expected received frames is less than the effective frame threshold, or the frame loss ratio is less than the first single-pass detection threshold to end the IP single-pass detection of the detection period.

The method according to claim 1, wherein the method for detecting an IP single-pass further comprises a second detecting method, if the detection result of any one of the first and second detecting methods is an IP single The detection result of the method for detecting an IP single-pass is an IP single-pass, and the second detection method includes: acquiring, if receiving, a report of the transmission of the adjacent first and second valid real-time transmission control protocols, acquiring The number of accumulated packets in the first valid transmission 4 report;

Obtaining the cumulative number of issued packets in the second valid transmission report;

Obtaining the total number of receivables in the time interval of the first and second valid transmission reports;

Calculating, according to the cumulative number of packets sent in the first and second valid transmission reports, the total number of packets sent in the time interval of the first and second valid transmission reports;

Calculating a packet loss ratio according to the total number of packets sent and the total number of packets received, if the synchronization source flag of the received real-time transmission protocol remains unchanged, the packet loss ratio is greater than or equal to the second single-pass detection threshold, and If the total number of packets sent is greater than or equal to the threshold of the number of valid packets, the IP address is within the interval.

The method according to claim 3, wherein the first single pass detection threshold is equal to the second single pass detection threshold.

The method according to claim 3, wherein in the second detecting method, if If the synchronization source flag of the received real-time transmission protocol is changed, or the packet loss ratio is smaller than the second single-pass detection threshold, or the total number of packets sent is less than the effective number of packets, the time interval is ended. IP single pass detection inside.

6. A method for detecting an IP single pass, comprising:

Acquiring the number of accumulated delivery packets in the received first valid transmission report, where the first valid transmission report is a transmission report of the real-time transmission control protocol;

Obtaining a cumulative number of sent packets in the received second valid transmission report, where the second valid transmission report is a transmission report of the real-time transmission control protocol and adjacent to the first valid transmission report;

Calculating a packet loss ratio according to the total number of packets sent and the total number of packets received, if the synchronization source flag of the received real-time transmission protocol remains unchanged, the packet loss ratio is greater than or equal to a single-pass detection threshold, and the total If the number of packets sent is greater than or equal to the threshold of the number of valid packets, the channel is single-passed.

The method according to claim 6, wherein if the synchronization source flag of the received real-time transmission protocol frame is changed, or the packet loss ratio is smaller than the single-pass detection threshold, or the total number of packets sent is smaller than The effective number of packets is sent, and the IP single-pass detection in the time interval is ended.

8. A device for detecting an IP single pass, comprising: a first detecting device, wherein the first detecting device comprises:

a first receiving module, configured to receive a real-time transmission protocol frame within a detection period;

a first extraction module, configured to extract a sequence number of a first real-time transport protocol frame received by the first receiving module, a sequence number of a last real-time transport protocol frame, and a total number of packets in the detection period;

a first calculating module, configured to calculate, according to a sequence number of the first and last real-time transmission protocol frames, a desired number of received frames in the detection period, and further configured to: according to the expected number of received frames and the total The number of received packets calculates the frame loss ratio in the detection period;

If the synchronization source flag of the real-time transmission protocol frame received by the first receiving module remains unchanged, and the received sequence number hop value of any two adjacent real-time transmission protocol frames is less than or equal to the hopping threshold value And the number of expected received frames is greater than or equal to the effective frame threshold, and the frame loss ratio is greater than or equal to the first single pass detection threshold, and the first detecting device determines the IP single pass in the detecting period.

9. The detecting device according to claim 8, wherein the first detecting device further comprises The first judging module is configured to determine whether the synchronization source flag of the real-time transport protocol frame received by the first receiving module remains unchanged, and is used to determine the sequence number of any two adjacent real-time transport protocol frames received. Whether the hop value is less than or equal to the hop threshold, and is used to determine whether the expected number of received frames is greater than or equal to a valid frame threshold, and is used to determine whether the frame loss ratio is greater than or equal to the first Pass detection threshold.

The detecting device according to claim 8, wherein the detecting device of the IP single pass further comprises a second detecting device, if the detection result of any one of the first and second detecting devices is IP The detection result of the IP single-pass detection device is an IP single-pass, and the second detection device includes:

a second receiving module, configured to receive a transmission report of the first valid real-time transmission control protocol and a transmission report of a second valid real-time transmission control protocol adjacent to the first valid transmission message; the second extraction module And a method for extracting the cumulative number of packets sent in the first and second valid transmission reports and the total number of packets in the time interval of the first and second valid transmission reports;

a second calculating module, configured to calculate, according to the accumulated number of packets sent in the first and second valid sending reports, a total number of packets sent in a time interval of the first and second valid sending reports, and Calculate the proportion of lost packets by the total number of packets sent and the total number of packets received;

If the synchronization source identifier of the report of the real-time transmission protocol received by the second receiving module remains unchanged, the total number of packets sent is greater than or equal to the threshold of the number of valid packets, and the packet loss ratio is greater than or equal to the second single-pass detection. The threshold, the second detecting means determines the IP single pass in the time interval.

The detecting device according to claim 10, wherein the first single pass detection threshold is equal to the second single pass detection threshold.

The detecting device according to claim 10, wherein the second detecting device further comprises a second determining module, configured to determine a synchronization source flag of the report of the real-time transport protocol received by the second receiving module Whether the value of the total number of packets sent is greater than or equal to the threshold of the number of valid packets, and is used to determine whether the packet loss ratio is greater than or equal to the second single-pass detection threshold.

13. An apparatus for detecting an IP single pass, comprising:

a receiving module, configured to receive a sending report of the first valid real-time transmission control protocol and a sending report of a second valid real-time transmission control protocol adjacent to the first valid sending message;

An extracting module, configured to extract a cumulative number of outgoing packets in the first and second valid sending reports, and a total number of received packets in a time interval of the first and second valid sending reports; a calculation module, configured to calculate, according to the cumulative number of packets sent in the first and second valid transmission reports, a total number of packets sent in a time interval of the first and second valid transmission reports, and further, according to the total Calculate the packet loss ratio by the number of packets sent and the total number of packets received;

If the synchronization source identifier of the report of the real-time transmission protocol received by the receiving module remains unchanged, the packet loss ratio is greater than or equal to the single-pass detection threshold, and the total number of packets sent is greater than or equal to the threshold of the effective number of packets sent, The detecting means determines the IP single pass within the time interval.

The detecting device according to claim 13, further comprising a second determining module, configured to determine whether a synchronization source flag of the report of the real-time transmission protocol received by the receiving module remains unchanged, and is used for determining Whether the total number of packets is greater than or equal to the threshold of the number of valid packets, and is used to determine whether the packet loss ratio is greater than or equal to the single-pass detection threshold.