WO2016173270A1 - 一种通信网络延时抖动平滑方法、装置及系统 - Google Patents

一种通信网络延时抖动平滑方法、装置及系统 Download PDF

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Publication number
WO2016173270A1
WO2016173270A1 PCT/CN2015/097537 CN2015097537W WO2016173270A1 WO 2016173270 A1 WO2016173270 A1 WO 2016173270A1 CN 2015097537 W CN2015097537 W CN 2015097537W WO 2016173270 A1 WO2016173270 A1 WO 2016173270A1
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initialization
service flow
receiving module
value
delay
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PCT/CN2015/097537
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English (en)
French (fr)
Inventor
祁云磊
李春荣
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华为技术有限公司
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Priority to JP2017555226A priority Critical patent/JP6501433B2/ja
Priority to EP15890645.3A priority patent/EP3280198B1/en
Priority to KR1020177032503A priority patent/KR102001616B1/ko
Publication of WO2016173270A1 publication Critical patent/WO2016173270A1/zh
Priority to US15/797,831 priority patent/US10389645B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0016—Arrangements for synchronising receiver with transmitter correction of synchronization errors
    • H04L7/0033—Correction by delay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/28—Flow control; Congestion control in relation to timing considerations
    • H04L47/283—Flow control; Congestion control in relation to timing considerations in response to processing delays, e.g. caused by jitter or round trip time [RTT]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0852—Delays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/16—Threshold monitoring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0079—Receiver details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0647—Synchronisation among TDM nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0658—Clock or time synchronisation among packet nodes
    • H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
    • H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0658—Clock or time synchronisation among packet nodes
    • H04J3/0673—Clock or time synchronisation among packet nodes using intermediate nodes, e.g. modification of a received timestamp before further transmission to the next packet node, e.g. including internal delay time or residence time into the packet

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a communication network delay jitter smoothing method, device and system.
  • communication networks are gradually moving toward centralized, complex, and intelligent.
  • the network of communication networks As the number of network devices continues to increase, the performance of network devices and network devices The coupling degree is getting higher and higher.
  • the communication network provides two-way service flow transmission service.
  • asymmetric delay between the forward traffic flow direction and the reverse traffic flow direction (English full name: Asymmetric Delay), that is, there is asymmetry in the delay generated by the forward traffic direction and the delay generated by the reverse traffic direction
  • a wireless communication network for example, a mobile communication network
  • a wired communication network for example, Asymmetric digital subscriber line (English name: Asymmetric digital subscriber line, English abbreviation: ADSL), ultra-high-speed digital subscriber line (English name: Very-high-data-rate digital subscriber line, English abbreviation: VDSL), or dedicated Communication networks (eg, power communication networks) that have two-way asymmetricity in data transmission When jitter.
  • a modern mobile communication network adopts a centralized/cooperative/cloud computing wireless access network (English name: Clean, centralized processing, collaborative radio, and real-time cloud radio access network, English abbreviation: C -RAN), C-RAN is characterized by centralization, collaboration, virtualization, etc.
  • the baseband control unit (English name: Baseband control unit, English abbreviation: BBU) is centralized, which makes the radio remote.
  • the distance between the unit (English name: Remote radio unit, English abbreviation: RRU) and the BBU becomes farther, so that the corresponding transmission network needs to be deployed to solve the data transmission between the RRU and the BBU.
  • the network is called the forward return network (English name: FrontHaul).
  • FrontHaul can use optical transmission equipment networking or packet switching equipment networking.
  • the data transmission and reception bidirectional path will introduce bidirectional asymmetric delay jitter. .
  • the embodiments of the present invention provide a method, a device, and a system for delaying jitter of a communication network, so as to solve the problem of user communication abnormality caused by a bidirectional asymmetric delay jitter exceeding limit.
  • an initialization method for delay jitter smoothing of a communication network including:
  • the receiving module of the local device clears the forward delay threshold and the reverse delay threshold at the beginning of the initialization time
  • the receiving module of the local device determines a real-time value of the forward delay corresponding to the current service flow fragment, and receives a reverse delay threshold corresponding to the current service flow fragment sent by the sending module of the peer device;
  • the receiving module of the local device determines that the real-time value of the forward delay corresponding to the current service flow fragment and the maximum value of the reverse delay threshold corresponding to the current service flow fragment are greater than the forward delay.
  • the current value of the threshold value, the current value of the forward delay threshold value is replaced by the maximum value;
  • the receiving module of the local device determines that the initialization delay time is not completed, and returns a real-time value of the forward delay corresponding to the next service flow fragment and a reverse delay threshold corresponding to the next service flow fragment. .
  • a compensation method is provided, the compensation method being applied to the end of the initialization time described in the first aspect, the compensation method comprising:
  • the receiving module of the local device determines that the forward delay threshold after the initialization is greater than the real-time value corresponding to the forward delay of the first service flow fragment, and the forward delay gate after the initialization ends As the difference between the limit value and the real-time value of the forward delay corresponding to the first service flow fragment The delay compensation time of the first service flow fragmentation.
  • the method further includes:
  • the receiving module of the local device returns to perform the initialization of the first aspect when receiving the re-initialization signal sent by the sending module of the peer device.
  • the method further includes:
  • the method further includes:
  • the receiving module of the local device determines that the difference between the forward delay threshold value after the initialization is completed and the real-time value of the forward delay of each service flow fragment exceeds the limit value in the first predetermined period. When the number of times reaches the first threshold, the initialization of the first aspect is performed.
  • the method further includes:
  • the receiving module of the local device determines that, when the real-time value of the forward delay of each service flow fragment is less than the waiting time of the service flow fragment entering the service buffer unit reaches the second threshold in the second predetermined period, Returning to the initialization of performing the first aspect.
  • a third aspect provides a receiving module of a local device, where the receiving module of the local device includes a setting unit for performing initialization, an obtaining unit for performing initialization, a determining unit for performing initialization, and Perform the initialization of the return unit, where:
  • the setting unit is configured to clear a forward delay threshold and a reverse delay threshold when the initialization time starts;
  • the obtaining unit is configured to determine a real-time value of the forward delay corresponding to the current service flow fragment, and receive a reverse delay threshold corresponding to the current service flow fragment sent by the sending module of the peer device;
  • the determining unit is configured to determine that a real-time value of the forward delay corresponding to the current service flow fragment and a maximum value of the reverse delay threshold corresponding to the current service flow fragment are greater than a forward delay gate The current value of the limit value, the current value of the forward delay threshold value is replaced by the maximum value;
  • the returning unit is configured to determine that the initialization time is not over, and return to perform the acquisition of the next industry The real-time value of the forward delay corresponding to the traffic fragment and the reverse delay threshold corresponding to the fragment of the next service stream.
  • the receiving module of the local device further includes:
  • a compensation unit configured to determine that a forward delay threshold value after the initialization is greater than a real-time value corresponding to the forward delay of the first service flow fragment, and a forward delay threshold value after the initialization is completed
  • the first service flow fragment corresponds to a difference between the real-time values of the forward delays as the delay compensation time of the first service flow fragment.
  • the receiving module of the local device further includes:
  • the processing unit is configured to return to perform the initialization when receiving the re-initialization signal sent by the sending module of the peer device.
  • the receiving module of the local device further includes:
  • a first processing unit configured to return to perform the initialization when the first processing unit is configured to determine that the service channel status is abnormal.
  • the receiving module of the local device further includes:
  • a second processing unit configured to determine, in the first predetermined period, the forward delay threshold value after the initialization is completed minus the number of times the difference between the real-time value of the forward delay of each service stream fragment exceeds the limit value When the first threshold is reached, the initialization is returned.
  • the receiving module of the local device further includes:
  • a third processing unit configured to determine, when the real-time value of the forward delay of each service flow fragment is less than the waiting time of the service flow fragment entering the service buffer unit reaches the second threshold, returning in the second predetermined period Perform the initialization.
  • a communication system comprising:
  • the transmitting module of the peer device and the receiving module of the local device provided by any one of the foregoing third aspect or the third aspect.
  • the communications system further includes a forwarding module.
  • the receiving module clears the forward delay threshold and the reverse delay threshold at the beginning of the initialization time; in the initialization time, each service stream is sliced: determining the current service flow.
  • the maximum value of the forward delay real-time value corresponding to the slice and the reverse delay threshold corresponding to the current service flow slice is greater than the current value of the forward delay threshold, the maximum value is replaced by the maximum value The current value of the forward delay threshold. Therefore, at the end of the initialization, the delay threshold after the initialization is determined, and the delay threshold is applied to the delay compensation, which can significantly reduce the bidirectional asymmetric delay jitter and prevent the user communication abnormality caused by the jitter overrun. .
  • FIG. 1 is a flowchart of a method for delaying jitter synchronization initialization of a communication network according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of an implementation scenario of a method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a first application scenario of a method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a second application scenario of a method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a third application scenario of a method according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a fourth application scenario of a method according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a receiving module of a local device according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a hardware of a receiving module of a local device according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • the embodiment of the invention provides a method, a device and a system for delaying jitter of a communication network, so as to significantly reduce bidirectional asymmetric delay jitter in a service scenario in which a transmitting module of a peer device interacts with a receiving module of the local device. Prevent user communication problems caused by jitter overruns.
  • local device in the specification and claims of the present application and the drawings refers to a device at one end of a link of a communication network; “peer device” refers to a device at the other end of a link of a communication network.
  • FIG. 1 is a flowchart of a method for delaying jitter synchronization initialization of a communication network according to an embodiment of the present invention. As shown in FIG. 1, the method may include:
  • S102 The receiving module of the local device clears the forward delay threshold and the reverse delay threshold at the beginning of the initialization time.
  • the link of the communication network is bidirectional.
  • the service flow is mapped to the service frame on the device at the link end of the communication network to form a service frame, and the service frame is demapped on the device at the other end of the link of the communication network to form a service flow fragment.
  • the read service stream fragment is restored to a continuous service flow.
  • the bidirectional delay may be different, so there is bidirectional asymmetric delay jitter.
  • the local device may include a sending module and a receiving module; the peer device may include a sending module and a receiving module.
  • the sending module can implement the function of service frame mapping, and the receiving module can implement the function of service frame demapping.
  • the service flow can be flowed from the sending module of the peer device to the receiving mode of the local device.
  • the direction of the block is called the service flow forward direction.
  • the direction of the service flow from the sending module of the local device to the receiving module of the peer device is called service flow reversal.
  • the BBU device and the RRU device in the C-RAN network are respectively disposed at two ends of the link of the communication network, and the sending module and the receiving module can be set on the BBU device.
  • the sending module can also be set on the RRU device device. And receiving module.
  • an initialization process can be performed on the receiving module.
  • the receiving module of the local device determines to clear the forward delay threshold and the reverse delay threshold at the beginning of the initialization time.
  • the forward delay threshold is determined by the receiving module of the local device, and can be synchronously synchronized to the sending module of the peer device;
  • the reverse delay threshold is determined by the peer device.
  • the receiving module determines, and can synchronize the reverse delay threshold to the sending module of the local device.
  • the initialization time refers to a time period experienced by the initialization process.
  • the initialization time may be represented by a start time and an end time.
  • the initialization start time is 12:00, and the initialization start time is 12:15.
  • This initialization process goes through a period of 15 minutes.
  • the initialization time may be manually configured, or may be automatically generated and automatically adjusted by the receiving module of the local device according to the control policy.
  • the receiving module of the local device automatically sets the initialization time to 5 minutes initially, after the initialization is completed.
  • the receiving module of the local device will re-trigger initialization, and automatically adjust the initialization time period, for example, to 10 minutes.
  • the operation to clear the forward delay threshold and the reverse delay threshold since the forward delay threshold and the reverse delay threshold may store historical values at the beginning of the initialization phase, such as the forward delay threshold and the reverse delay threshold determined in the previous initialization process. . In order not to affect the effect of this initialization process, the forward delay threshold and the reverse delay threshold are cleared at the beginning of each initialization process.
  • the receiving module of the local device determines a real-time value of the forward delay corresponding to the current service flow fragment, and receives a reverse corresponding to the current service flow fragment sent by the sending module of the peer device. Delay threshold.
  • the service flow is continuously transmitted.
  • the service frame is continuously transmitted from the link of the communication network to the other end.
  • the service frame is transmitted from the sending module of the peer device to the receiving module of the local device.
  • a plurality of service frames are transmitted in the initialization time, and after reaching the receiving module of the local device, the traffic is fragmented by demapping.
  • the receiving module of the local device determines the real-time value of the forward delay corresponding to the current service flow fragment.
  • the forward delay real-time value refers to the delay experienced by the service frame transmitted on the link of the communication network.
  • the sending module of the peer device when the sending module of the peer device performs a service frame mapping operation on the service flow to form a service frame, when the service frame enters the link of the communication network, the transmitting module of the peer device performs delay measurement. Identify the exit time stamp.
  • the egress timestamp information may be synchronized to the receiving module of the local device.
  • the receiving module of the local device performs delay measurement when identifying the service frame from the link of the communication network, and identifies the entry time stamp. In this way, the entry timestamp and the exit timestamp are the real-time values of the forward delay corresponding to the current traffic flow fragmentation.
  • the receiving module of the local device receives the reverse delay threshold corresponding to the current service flow fragment sent by the sending module of the peer device.
  • the receiving module of the peer device can determine the reverse delay threshold according to the reverse transmission path of the service flow, so that the sending module of the peer device can delay the corresponding service flow segmentation in a synchronous manner.
  • the time threshold is sent to the receiving module of the local device. Therefore, the receiving module of the local device can obtain the real-time value of the forward delay corresponding to the current service flow fragment and the reverse delay threshold corresponding to the current service flow fragment.
  • the receiving module of the local device determines that a real-time value of the forward delay corresponding to the current service flow fragment and a maximum value of the reverse delay threshold corresponding to the current service flow fragment are greater than a forward direction. When the current value of the threshold value is delayed, the current value of the forward delay threshold is replaced with the maximum value.
  • the receiving module of the local device determines two values.
  • the maximum value the maximum value is compared with the current value of the positive delay threshold, When the maximum value is greater than the current value of the forward delay threshold, the current value of the forward delay threshold is replaced by the maximum value. For another example, when the maximum value is less than or equal to the current value of the forward delay threshold, the current value of the forward delay threshold is kept unchanged.
  • the receiving module of the local device determines that the initialization delay time is not completed, and returns a real-time value of the forward delay corresponding to the next service flow fragment and a reverse delay gate corresponding to the next service flow fragment. Limit.
  • the process returns to the S104, and obtains a real-time value of the forward delay corresponding to the next service flow fragment and a reverse delay corresponding to the next service flow fragment. Time threshold.
  • the obtaining process is similar to the above description for the S104, and details are not described herein.
  • the receiving module of the local device After receiving the forward delay real-time value corresponding to the next service flow fragment and the reverse delay threshold corresponding to the next service flow fragment, the receiving module of the local device performs S106 to determine two values. The maximum value of the forward delay real-time value corresponding to the next service flow fragment and the maximum value of the reverse delay threshold corresponding to the next service flow fragment and the forward delay threshold The current value is compared.
  • the current value of the forward delay threshold is greater than the current value of the next service flow fragment, the current value of the forward delay threshold is replaced with the maximum value corresponding to the next service flow fragment.
  • the S104 and S106 are repeatedly executed until the initialization time ends.
  • the forward delay threshold value after the initialization is completed is determined.
  • the initialization process is described by taking the receiving module of the local device as an example.
  • the receiving module of the peer device can determine the reverse threshold delay value after the initialization is completed by performing the initialization process, and the initialization process performed by the receiving module of the peer device is similar, and details are not described herein.
  • the link of the communication network transmitting the service flow may be in an unstable state, so when the communication system is started, the initialization process may be performed to determine the optimal delay threshold. value.
  • the receiving module of the local device when the receiving module of the local device performs the initialization process, in order to ensure the consistency of the bidirectional link delay, the receiving module of the peer device also performs an initialization process.
  • the receiving module of the local device triggers the reinitialization process.
  • the receiving module of the local device determines the delay threshold value after the initialization is completed at the end of initialization, and applies the delay threshold to the delay compensation, which can be significantly reduced. Two-way asymmetric delay jitter to prevent user communication anomalies caused by jitter overruns.
  • a compensation method includes: the receiving module of the local device determines that the forward delay threshold after the initialization is greater than the forward delay of the first service flow fragment.
  • the difference between the forward delay threshold value after the initialization is completed and the real-time value corresponding to the forward delay of the first service flow fragment is used as the first service flow fragmentation Delay compensation time.
  • the receiving module of the local device can determine the forward delay threshold after the initialization is completed after the initialization process is performed.
  • the receiving module of the local device processes the first service flow fragment, it can be determined that the forward delay threshold after the initialization is greater than the real-time value corresponding to the forward delay of the first service flow fragment, The difference between the forward delay threshold value after the initialization is completed and the real-time value of the forward delay corresponding to the first service flow fragment is used as the delay compensation time of the first service flow fragment.
  • the delay compensation time can be controlled by controlling the dwell time of the first traffic stream fragment in the service buffer unit.
  • the forward delay threshold after the initialization is smaller than the real-time value of the forward delay corresponding to the first service flow fragment
  • the first service flow fragment does not need to be compensated for delay.
  • the first service flow fragment does not stay in the service cache unit.
  • the receiving module of the local device returns to perform the initialization process when receiving the re-initialization signal sent by the sending module of the peer device.
  • the receiving module of the local device will use the local end when starting initialization.
  • the sending module of the device sends a reinitialization signal to the receiving module of the peer device, and notifies the receiving module of the peer device to also initialize. That is to say, when the receiving module initialization of one end starts, the receiving module at the other end also performs an initialization process.
  • the receiving module of the local device triggers the initialization process, and also notifies the receiving module of the peer device to also trigger the initialization process.
  • the initialization process of the local device and the receiving module on the peer device may be synchronized.
  • the re-initialization signal may be synchronized to the transmitting module of the peer device, and the re-initialization signal includes an initialization start time and an end time. Therefore, the receiving modules at both ends can perform the initialization process in the same time period.
  • the initialization process of the receiving modules at both ends may also be out of synchronization.
  • the forward delay threshold determined by the receiving module of the local device needs to be synchronized to the sending module of the peer device; likewise, the reverse delay threshold determined by the receiving module of the peer device is required.
  • the transmission module is synchronized to the local device.
  • the forward delay threshold and the reverse delay threshold do not need to be synchronized. Therefore, a forward delay threshold or a reverse delay threshold can be used as the reinitialization signal.
  • the first forward delay threshold determined by the receiving module of the local device is synchronized to the sending module of the peer device, and the sending module of the peer device.
  • Receiving the first forward delay threshold, notifying the receiving module of the peer device, and the receiving module of the peer device triggers the initialization process, so that the first reverse delay determined by the receiving module of the peer device
  • the threshold is also synchronized to the transmitting module of the local device, so that the receiving modules at both ends are initialized.
  • the receiving modules at both ends do not require synchronization.
  • the receiving module of the local device has been initialized, and the receiving module of the peer device has not finished initializing.
  • the receiving module of the local device may also receive the reverse delay threshold of the peer synchronization. Only after receiving the initialization of the receiving module of the local device, the received reverse delay threshold is no longer processed. At the same time, in order not to affect the next initialization, the receiver does not process the reverse delay threshold.
  • the time period can be limited.
  • the receiving process returns to perform the initialization process.
  • the receiving module monitors the status of the service channel.
  • the receiving module of the local device monitors the channel status of the service flow, and the receiving module of the peer device reverses the service flow. Channel status is monitored.
  • the initialization process is restarted.
  • the receiving module of the local device determines, in a first predetermined period, a difference between a forward delay threshold value after the initialization is completed and a real-time value of a forward delay of each service flow fragment. When the number of times the limit value is exceeded reaches the first threshold, the initialization process is returned.
  • the receiving module of the local device performs corresponding compensation processing on each service stream fragment according to the forward delay threshold value after the initialization is completed.
  • the forward delay threshold after the initialization is shortened, and the difference between the real-time value of the forward delay of each service stream fragment exceeds the limit value.
  • the forward delay threshold after the initialization may be greater than or less than the real-time value of the forward delay of the service flow fragment, and then the forward delay after the initialization ends.
  • the difference between the threshold value minus the forward delay real-time value of each traffic stream fragment may be positive or negative, so the limit value is a range rather than a single value. If, in the first period, the difference exceeds the value range defined by the limit value, it indicates that the current forward delay threshold cannot be applied to the normal communication process. Improved delay jitter. Therefore, when the number of times reaches the first threshold, the initialization process is re-executed, and further, the forward delay threshold is re-determined.
  • the receiving module of the local device determines that the real-time value of the forward delay of each service flow fragment is less than the waiting time of the service flow fragment entering the service buffer unit in the second predetermined period.
  • the threshold is two, the initialization process is returned.
  • each service stream fragment is subjected to corresponding compensation processing.
  • the receiving module of the local device determines that the real-time value of the forward delay of each service flow fragment is less than the waiting time of the service flow fragment entering the service buffer unit reaches the second threshold, the receiving module determines that the second predetermined period is less than the second threshold. The initialization process is performed.
  • the forward delay after the initialization ends
  • the difference between the time threshold and the real-time value of the forward delay corresponding to the first service flow fragment is used as the delay compensation time of the first service flow fragment.
  • the delay compensation time can be controlled by controlling the dwell time of the first traffic stream fragment in the traffic buffer unit. For example, if the delay compensation time is 60 nanoseconds, the dwell time of the service flow slice in the service cache unit may be set to 60 nanoseconds.
  • the service flow fragmentation is continuous, and the service cache unit may not be able to absorb more service flow fragments due to the excessive service flow fragmentation, and the service flow fragment to be entered may wait for entering the service.
  • the cache unit which creates a wait time.
  • the delay compensation time is 60 nanoseconds
  • the waiting time of the service flow fragment entering the service buffer unit is 10 nanoseconds
  • the service flow fragmentation time in the service cache unit can be set to 50 nanoseconds. .
  • the waiting time is deducted from the compensation time. For example, if the delay compensation time is 60 nanoseconds, and the waiting time of the service flow fragment entering the service buffer unit is 70 nanoseconds, the service flow fragment will not stay in the service cache unit. Therefore, if the waiting time is too long or the waiting time is too long, it means that the delay threshold determined by the previous initialization process is no longer applicable, and it needs to be re-initialized to determine the new delay threshold.
  • the process of reinitializing according to the conditions that occurs in the initialization process and the normal communication state described above is described in the manner that the receiving module of the local device determines the forward delay threshold.
  • the manner in which the receiving module of the peer device determines the reverse delay threshold is similar to the above description, and details are not described herein again.
  • the clock precision of the communication device is often improved, thereby determining more accurate.
  • This conventional method cannot form a dynamic compensation mode.
  • the compensation strategy cannot be automatically adjusted, and the purpose of improving the bidirectional asymmetric delay jitter cannot be achieved.
  • the receiving module determines the delay threshold value after the initialization is completed at the end of initialization, and applies it to the delay compensation; and after a certain condition is met, the initialization is restarted. process.
  • the dynamic compensation mode is ensured, and when the communication path changes or an abnormal situation occurs, the compensation strategy is automatically adjusted to significantly reduce the bidirectional asymmetric delay jitter and prevent the user communication abnormality caused by the jitter overrun.
  • FIG. 2 is a schematic diagram of an implementation scenario of a method according to an embodiment of the present invention.
  • Figure 2 illustrates the delay smoothing process of the communication network from the perspective of traffic flow and signal transmission.
  • the receiving module of the local device and the sending module of the peer device are shown, but in the actual application, the local device may further include a sending module, and the peer device may further include a receiving module, and the structures thereof are corresponding to the same. Therefore, the following description takes the example of the receiving module of the local device and the transmitting module of the peer device as an example.
  • the sending module includes a service frame mapping unit, a high-precision clock synchronization unit, a high-precision time synchronization unit, a delay measurement unit, a bidirectional delay threshold synchronization unit, and a service channel monitoring unit.
  • the receiving module includes a service frame demapping unit and a high Precision clock synchronization unit, high-precision time synchronization unit, delay measurement unit, two-way delay threshold synchronization unit, service channel monitoring unit, forward delay threshold adjustment unit, delay compensation unit and service flow buffer unit.
  • the sending module and the receiving module may further include a forwarding module, where the forwarding module includes a service frame forwarding unit, configured to implement forwarding of the service frame.
  • the service frame mapping unit converts the service flow into a service frame that matches the processed service forwarding mode. For example, in a FrontHaul network, traffic is converted to FH frames that match the FrontHaul forwarding mode.
  • the service frame forwarding unit implements forwarding of the service frame. For example, in the FrontHaul network, It is responsible for transmitting the FH frame from the sending module to the receiving module according to the Fronthaul forwarding rules.
  • the service frame demapping unit is responsible for restoring the service frame into a service flow fragment. For example, in a FrontHaul network, FH frames are restored to traffic stream fragments.
  • the service flow buffer unit is responsible for buffering the recovered service flow fragmentation. When the dwell time satisfies the read condition, the service flow fragment is read out and restored to a continuous service flow and sent out from the receiving module.
  • the high-precision clock synchronization unit is responsible for interacting with precise clock information of the transmitting module and the receiving module to implement high-precision clock synchronization.
  • the clock synchronization information can be transmitted through a service frame or through a separate clock message.
  • the high-precision time synchronization unit is responsible for precise time information interaction between the transmitting module and the receiving module, and achieves high-precision time synchronization.
  • the time synchronization information can be transmitted through a service frame or through a separate time message.
  • the delay measurement unit is responsible for delay measurement of the link of the service frame through the communication network, and is implemented by recording the time difference of the entry and exit time stamps of the service frames at both ends of the link of the communication network.
  • the timestamp information can be transmitted through the service frame or through independent delay measurement information.
  • the bidirectional delay threshold synchronization unit is responsible for real-time synchronization of the delay thresholds of the transmitting module and the receiving module.
  • the delay threshold can be transmitted through the service frame or through an independent delay threshold message.
  • the service channel monitoring unit is responsible for monitoring the status of the service channel.
  • the fault detection information may be transmitted through a service frame or through an independent fault detection message.
  • the forward delay threshold adjustment unit is responsible for completing the calculation and adjustment of the forward path delay threshold value through the initialization process.
  • the delay compensation unit is responsible for calculating the delay compensation time by using the forward delay threshold value after the initialization is completed and the real-time value of the forward delay corresponding to the service flow segment, and controlling the service flow buffer unit to perform compensation.
  • the forward delay threshold adjustment unit implements a synchronization method for delaying jitter of the communication network, include:
  • the forward delay threshold adjustment unit is configured to clear a forward delay threshold and a reverse delay threshold at the beginning of the initialization time
  • the forward delay threshold adjustment unit is configured to determine a real-time value of the forward delay corresponding to the current service flow fragment, and receive a reverse delay threshold corresponding to the current service flow fragment sent by the sending module;
  • the forward delay threshold adjustment unit is configured to determine that a real-time value of the forward delay corresponding to the current service flow fragment and a maximum value of the reverse delay threshold corresponding to the current service flow fragment are greater than When the current value of the forward delay threshold is used, the current value of the forward delay threshold is replaced by the maximum value;
  • the forward delay threshold adjustment unit is configured to: when the initialization time is not completed, return to perform the real-time value of the forward delay corresponding to the next service flow fragment and the reverse delay corresponding to the next service flow fragment Time threshold.
  • the compensation method based on the foregoing initialization method includes: the delay compensation unit, configured to determine that the forward delay threshold after the initialization is greater than the real-time forward delay corresponding to the first service flow fragmentation a value, the difference between the forward delay threshold value after the initialization is completed and the real-time value of the forward delay corresponding to the first service flow fragment is used as the delay of the first service flow fragmentation Compensation time.
  • the forward delay threshold adjustment unit is configured to return to perform the initialization when receiving the re-initialization signal sent by the sending module.
  • the forward delay threshold adjustment unit is configured to return to perform the initialization when the service channel status is abnormal.
  • the forward delay threshold adjustment unit is configured to determine, in the first predetermined period, a forward delay threshold after the initialization is completed, and a forward delay of each service stream fragment is real-time. When the number of times the difference of the value exceeds the limit value reaches the first threshold, the initialization is returned.
  • the forward delay threshold adjustment unit is configured to determine a second predetermined period, each When the real-time value of the forward delay of the service flow fragment is less than the waiting time of the service flow fragment entering the service buffer unit reaches the second threshold, the initialization is returned.
  • FIG. 2 is a schematic diagram of an implementation scenario of the method of the embodiment of the present invention, and each unit in FIG. 2 can perform corresponding steps in the method of the foregoing embodiment.
  • the receiving module determines the delay threshold after the initialization is completed at the end of the initialization, applies it to the delay compensation, and re-triggers the initialization process after satisfying certain conditions.
  • the dynamic compensation mode is ensured, and when the communication path changes or an abnormal situation occurs, the compensation strategy is automatically adjusted to significantly reduce the bidirectional asymmetric delay jitter and prevent the user communication abnormality caused by the jitter overrun.
  • FIG. 3 is a schematic diagram of a first application scenario of a method according to an embodiment of the present invention.
  • Figure 3 implements the FrontHaul network through a packet transport network (English name: Packet transport network, English abbreviation: PTN) node.
  • the RRU and the BBU are connected to the PTN node through a common public radio interface (English common name: Common public radio interface, English abbreviation: CPRI), and the PTN nodes are connected through an Ethernet (Ethernet) interface.
  • the sending module and the receiving module are respectively deployed on the PTN1 and PTN3 nodes, thereby respectively carrying the transmission of the service flow forward and the service flow reverse.
  • a forwarding module deployed on the PTN2 node may also be included.
  • the link of the communication network between PTN1 and PTN3 forms a bidirectional asymmetric delay jitter smoothing domain.
  • the respective steps in the method of the above embodiment may be performed by the respective units in FIG. 3, and details are not described herein.
  • FIG. 4 is a schematic diagram of a second application scenario of a method according to an embodiment of the present invention.
  • the difference between the structure of FIG. 4 and FIG. 3 is that the sending module and the receiving module in the PTN1 are migrated to the RRU device, and the sending module and the receiving module in the PTN3 are migrated to the BBU device.
  • PTN1, PTN2, and PTN3 only undertake forwarding. Therefore, the link of the communication network between the BBU and the RRU forms a bidirectional asymmetric delay jitter smoothing domain.
  • the respective steps in the method of the above embodiment may be performed by the respective units in FIG. 4 and will not be described herein.
  • FIG. 5 is a schematic diagram of a third application scenario of a method according to an embodiment of the present invention.
  • Figure 5 realizes the FrontHaul network through the optical transport network (English full name: Optical transport network, English abbreviation: OTN) node.
  • the RRU and the BBU are connected to the OTN node through the CPRI interface, and the OTN nodes are connected by the wavelength division multiplexing (Wavelength division multiplexing, English abbreviation: WDM) interface.
  • the transmitting module and the receiving module are respectively deployed on the OTN1 and OTN3 nodes, thereby respectively carrying forward the traffic flow forward and the reverse flow of the service flow.
  • a forwarding module deployed on the OTN2 node may also be included.
  • the link of the communication network between OTN1 and OTN3 forms a bidirectional asymmetric delay jitter smoothing domain.
  • the respective steps in the method of the above embodiment may be performed by the respective units in FIG. 5, and details are not described herein.
  • FIG. 6 is a schematic diagram of a fourth application scenario of a method according to an embodiment of the present invention.
  • FIG. 6 realizes the power communication network through the PTN node, and specifically realizes the communication of the relay protection system of the substation A and the substation B.
  • the substation A relay protection system and the substation B relay protection system are connected to the PTN node through the E1 interface, and the PTN nodes are connected through an Ethernet interface.
  • the sending module and the receiving module are respectively deployed on the PTN1 and PTN3 nodes, thereby respectively carrying the transmission of the service flow forward and the service flow reverse.
  • a forwarding module deployed on the PTN2 node may also be included.
  • the link of the communication network between PTN1 and PTN3 forms a bidirectional asymmetric delay jitter smoothing domain.
  • the units in FIG. 6 can perform the corresponding steps in the method of the above embodiment, and details are not described herein.
  • FIG. 7 is a schematic structural diagram of a receiving module of a local device according to an embodiment of the present invention; and a receiving module of the local device corresponding to FIG. 7 may perform corresponding steps in the method of the foregoing embodiment.
  • the receiving module of the local device includes a setting unit 702 for performing initialization, an obtaining unit 704 for performing initialization, a determining unit 706 for performing initialization, and a returning unit 708 for performing initialization. :
  • the setting unit 702 is configured to clear a forward delay threshold and a reverse delay threshold when the initialization time starts;
  • the obtaining unit 704 is configured to determine a real-time value of the forward delay corresponding to the current service flow fragment, and receive a reverse delay threshold corresponding to the current service flow fragment sent by the sending module of the peer device;
  • the determining unit 706 is configured to determine that a real-time value of the forward delay corresponding to the current service flow fragment and a maximum value of the reverse delay threshold corresponding to the current service flow fragment are greater than a forward delay The current value of the threshold value, the current value of the forward delay threshold value is replaced by the maximum value;
  • the returning unit 708 is configured to: when it is determined that the initialization time is not over, return to perform the real-time value of the forward delay corresponding to acquiring the next service flow fragment and the reverse delay threshold corresponding to the next service flow fragment .
  • the receiving module of the local device further includes a compensation unit, where the compensation unit is configured to determine that the forward delay threshold after the initialization is greater than the real-time delay corresponding to the first service flow fragment. a value, the difference between the forward delay threshold value after the initialization is completed and the real-time value of the forward delay corresponding to the first service flow fragment is used as the delay of the first service flow fragmentation Compensation time.
  • the receiving module of the local device further includes a processing unit, where the processing unit is configured to return to perform the initialization when receiving the re-initialization signal sent by the sending module of the peer device.
  • the receiving module of the local device further includes a first processing unit, where the first processing unit is configured to return to perform the initialization when the service channel status is abnormal.
  • the receiving module of the local device further includes a second processing unit, where the second processing unit is configured to determine a forward delay threshold value after the initialization is completed in the first predetermined period, and subtract each When the number of times the difference between the forward delay real-time values of the service flow fragments exceeds the limit value reaches the first threshold, the initialization is returned.
  • the second processing unit is configured to determine a forward delay threshold value after the initialization is completed in the first predetermined period, and subtract each When the number of times the difference between the forward delay real-time values of the service flow fragments exceeds the limit value reaches the first threshold, the initialization is returned.
  • the receiving module of the local device further includes a third processing unit, where the third processing unit is configured to determine that the real-time value of the forward delay of each service flow segment is less than the second predetermined period.
  • the third processing unit is configured to determine that the real-time value of the forward delay of each service flow segment is less than the second predetermined period.
  • the receiving module of the local device shown in FIG. 7 can perform the corresponding steps in the method of the above embodiment.
  • the structure of the receiving module of the peer device is the same as that of the receiving module of the local device, and details are not described herein.
  • the receiving module determines the delay threshold after the initialization is completed at the end of the initialization, applies it to the delay compensation, and re-triggers the initialization process after satisfying certain conditions. Guaranteed dynamic compensation mode, and automatically when the communication path changes or abnormal conditions occur
  • the adjustment compensation strategy significantly reduces the bidirectional asymmetric delay jitter and prevents the user communication abnormality caused by the jitter overrun.
  • FIG. 8 is a schematic structural diagram of a hardware of a receiving module of a local device according to an embodiment of the present invention.
  • the receiving module of the local device corresponding to FIG. 8 can perform the corresponding steps in the method of the foregoing embodiment.
  • the receiving module of the local device includes a processor 801, a memory 802, an interface 803, and a bus 804.
  • the interface 803 can be implemented by using a wireless or wired method, for example, a component such as a network card, and the foregoing processing.
  • the 801, the memory 802, and the interface 803 are connected by a bus 804.
  • the memory 802 stores program code.
  • the program code can include an operating system program and an application.
  • the processor 801 performs an initialization process:
  • the processor 801 clears the forward delay threshold and the reverse delay threshold at the beginning of the initialization time
  • the processor 801 determines a real-time value of the forward delay corresponding to the current service flow fragment, and the processor 801 receives, by using the interface 803, the current service flow fragment corresponding to the sending module of the peer device.
  • Reverse delay threshold
  • the processor 801 determines that a maximum value of the forward delay real-time value corresponding to the current service flow fragment and a reverse delay threshold corresponding to the current service flow fragment is greater than a forward delay threshold.
  • the current value of the value, the current value of the forward delay threshold is replaced by the maximum value;
  • the processor 801 when it is determined that the initialization time is not completed, returns to perform a forward delay real-time value corresponding to the next service flow fragment and a reverse delay threshold corresponding to the next service flow fragment.
  • the processor 801 determines that the forward delay threshold after the initialization is greater than the real-time value of the forward delay corresponding to the first service flow fragment, and the forward delay after the initialization ends The difference between the time threshold and the real-time value of the forward delay corresponding to the first service flow fragment is used as the delay compensation time of the first service flow fragment.
  • the processor 801 receives the heavy sent by the sending module of the peer device.
  • the initialization is returned.
  • the processor 801 returns to perform the initialization when determining that the service channel status is abnormal.
  • the processor 801 determines, in the first predetermined period, that the difference between the forward delay threshold value after the initialization is completed and the real-time value of the forward delay of each service flow fragment exceeds the limit. When the number of times reaches the first threshold, the initialization is returned.
  • the memory 802 includes a service cache unit, where the processor 801 determines that the real-time value of the forward delay of each service flow fragment is smaller than the service flow fragment enters the service cache unit in the second predetermined period. When the number of waiting times reaches the second threshold, the initialization is returned.
  • the receiving module of the local device shown in FIG. 8 can perform the corresponding steps in the method of the above embodiment.
  • the structure of the receiving module of the peer device is the same as that of the receiving module of the local device, and details are not described herein.
  • the receiving module determines the delay threshold after the initialization is completed at the end of the initialization, applies it to the delay compensation, and re-triggers the initialization process after satisfying certain conditions.
  • the dynamic compensation mode is ensured, and when the communication path changes or an abnormal situation occurs, the compensation strategy is automatically adjusted to significantly reduce the bidirectional asymmetric delay jitter and prevent the user communication abnormality caused by the jitter overrun.
  • FIG. 9 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • the communication system provided by the embodiment of the present invention may include a sending module of the peer device and a receiving module of the local device provided in the foregoing embodiment of FIG. 7 or FIG. 8.
  • the receiving module is not described herein again.
  • the system further includes a forwarding module.
  • the forwarding module is disposed on a link of a communication network between the sending module of the peer device and the receiving module of the local device, and the forwarding module is used for forwarding the service frame.
  • aspects of the present invention, or possible implementations of various aspects may be embodied as a system, method, or computer program product.
  • aspects of the invention, or possible implementations of various aspects may employ an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, etc.), or a combination of software and hardware.
  • the form of the embodiment is collectively referred to herein as "circuit,” “module,” or “system.”
  • aspects of the invention, or possible implementations of various aspects may take the form of a computer program product, which is a computer readable program code stored in a computer readable medium.
  • the computer readable medium can be a computer readable signal medium or a computer readable storage medium.
  • the computer readable storage medium includes, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing, such as a random access memory (English name: Random access memory, English abbreviation: RAM) ), read-only memory (English full name: Read-only memory, English abbreviation: ROM), erasable programmable read-only memory (English full name: Erasable programmable read only memory, English abbreviation: EPROM) or flash memory, Optical fiber, portable read-only memory (English full name: Compact disc read-only memory, English abbreviation: CD-ROM).
  • the processor in the computer reads the computer readable program code stored in the computer readable medium such that the processor is capable of performing the various functional steps specified in each step of the flowchart, or a combination of steps; A device that functions as specified in each block, or combination of blocks.
  • the computer readable program code can execute entirely on the user's local computer, partly on the user's local computer, as a separate software package, partly on the user's local computer and partly on the remote computer, or entirely on the remote computer or Executed on the server. It should also be noted that in some alternative implementations, the functions noted in the various steps in the flowcharts or in the blocks in the block diagrams may not occur in the order noted. For example, two steps, or two blocks, shown in succession may be executed substantially concurrently or the blocks may be executed in the reverse order.

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Abstract

一种通信网络延时抖动平滑方法、装置及系统，该方法包括，接收模块在初始化时间开始时，清除正向延时门限值和反向延时门限值；在初始化时间内，对每个业务流分片执行：确定当前业务流分片对应的正向延时实时值和所述当前业务流分片对应的反向延时门限值中的最大值大于正向延时门限值的当前值时，用所述最大值替换所述正向延时门限值的当前值。从而在初始化结束时确定出所述初始化结束后的延时门限值，将其应用于延时补偿，可以显著减小双向非对称延时抖动，防止因抖动超限造成的用户通讯异常的问题。

Description

一种通信网络延时抖动平滑方法、装置及系统
本申请要求于2015年04月30日提交中国专利局、申请号为201510217473.1、发明名称为“一种通信网络延时抖动平滑方法、装置及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种通信网络延时抖动平滑方法、装置及系统。
背景技术
在当今的网络技术高速发展情况下，通信网络逐步向着集中化、复杂化、智能化方向发展，在通信网络组网中，随着网络设备数量的不断增加，网络设备的性能及网络设备之间耦合度要求越来越高，通常情况下，通信网络提供双向的业务流传输服务，不可避免的，正向业务流方向和反向业务流方向之间存在着非对称时延(英文全称：Asymmetric delay)，也就是说，正向业务流方向产生的延时和反向业务流方向产生的延时存在不对称性，例如，无线通信网络(例如，移动通信网络)，有线通信网络(例如，非对称数字用户线路(英文全称：Asymmetric digital subscriber line，英文缩写：ADSL)，超高速数字用户线路(英文全称：Very-high-data-rate digital subscriber line，英文缩写：VDSL))，或者专用的通信网络(例如，电力通信网)，这些通信网络在数据传输中都存在着双向非对称延时抖动。
以移动通信网络为例，现代移动通信网络采用了集中式/协作式/云计算无线接入网(英文全称：Clean，centralized processing，collaborative radio，and real-time cloud radio access network，英文缩写：C-RAN)，C-RAN具有集中化、协作化、虚拟化等特点，在C-RAN架构中，基带控制单元(英文全称：Baseband control unit，英文缩写：BBU)的集中化，使得射频拉远单元(英文全称：Remote radio unit，英文缩写：RRU)与BBU之间的距离变得更远，这样就需要部署相应的传送网络来解决RRU和BBU之间的数据传输，这种传送 网络被称为前向回传网(英文全称：FrontHaul)，FrontHaul可以采用光传送设备组网，也可以采用分组交换设备组网，不可避免的，数据收发双向路径会引入双向非对称延时抖动。
基于上述，在通信网络中，对数据传输的双向非对称延时抖动的范围有着严格的要求，当抖动超限时将会导致用户通讯的异常。
发明内容
有鉴于此，本发明实施例提供了一种通信网络延时抖动平滑方法、装置及系统，以解决由于双向非对称延时抖动超限造成的用户通讯异常的问题。
本发明实施例提供的技术方案如下。
第一方面，提供了一种通信网络延时抖动平滑的初始化方法，包括：
本端设备的接收模块在初始化时间开始时，清除正向延时门限值和反向延时门限值；
所述本端设备的接收模块确定当前业务流分片对应的正向延时实时值，接收对端设备的发送模块发送的所述当前业务流分片对应的反向延时门限值；
所述本端设备的接收模块确定所述当前业务流分片对应的正向延时实时值和所述当前业务流分片对应的反向延时门限值中的最大值大于正向延时门限值的当前值时，用所述最大值替换所述正向延时门限值的当前值；
所述本端设备的接收模块确定初始化时间未结束时，返回执行获取下一业务流分片对应的正向延时实时值和所述下一业务流分片对应的反向延时门限值。
第二方面，提供了一种补偿方法，该补偿方法应用于第一方面所述的初始化时间结束后，该补偿方法包括：
所述本端设备的接收模块确定所述初始化结束后的正向延时门限值大于第一业务流分片对应正向延时实时值时，将所述初始化结束后的正向延时门限值与所述第一业务流分片对应正向延时实时值之间的差值作为所述 第一业务流分片的延时补偿时间。
在第二方面的第一种可能的实现方式中，所述方法还包括：
所述本端设备的接收模块在接收到所述对端设备的发送模块发送的重新初始化信号时，返回执行所述第一方面的所述初始化。
在第二方面的第二种可能的实现方式中，所述方法还包括：
所述本端设备的接收模块确定业务通道状态为异常时，返回执行所述所述第一方面的所述初始化。
在第二方面的第三种可能的实现方式中，所述方法还包括：
所述本端设备的接收模块确定第一预定周期内，所述初始化结束后的正向延时门限值减去每个业务流分片的正向延时实时值的差值超出限定值的次数达到第一阈值时，返回执行所述第一方面的所述初始化。
在第二方面的第四种可能的实现方式中，所述方法还包括：
所述本端设备的接收模块确定第二预定周期内，每个业务流分片的正向延时实时值小于所述业务流分片进入业务缓存单元的等待时间的次数达到第二阈值时，返回执行所述第一方面的所述初始化。
第三方面，提供了一种本端设备的接收模块，所述本端设备的接收模块包括用于执行初始化的设置单元、用于执行初始化的获取单元、用于执行初始化的确定单元和用于执行初始化的返回单元，其中：
所述设置单元，用于在初始化时间开始时，清除正向延时门限值和反向延时门限值；
所述获取单元，用于确定当前业务流分片对应的正向延时实时值，接收对端设备的发送模块发送的所述当前业务流分片对应的反向延时门限值；
所述确定单元，用于确定所述当前业务流分片对应的正向延时实时值和所述当前业务流分片对应的反向延时门限值中的最大值大于正向延时门限值的当前值时，用所述最大值替换所述正向延时门限值的当前值；
所述返回单元，用于确定初始化时间未结束时，返回执行获取下一业 务流分片对应的正向延时实时值和所述下一业务流分片对应的反向延时门限值。
在第三方面的第一种可能的实现方式中，所述本端设备的接收模块还包括：
补偿单元，用于确定所述初始化结束后的正向延时门限值大于第一业务流分片对应正向延时实时值时，将所述初始化结束后的正向延时门限值与所述第一业务流分片对应正向延时实时值之间的差值作为所述第一业务流分片的延时补偿时间。
在第三方面的第二种可能的实现方式中，所述本端设备的接收模块还包括：
处理单元，用于在接收到所述对端设备的发送模块发送的重新初始化信号时，返回执行所述初始化。
在第三方面的第三种可能的实现方式中，所述本端设备的接收模块还包括：
第一处理单元，所述第一处理单元用于确定业务通道状态为异常时，返回执行所述初始化。
在第三方面的第四种可能的实现方式中，所述本端设备的接收模块还包括：
第二处理单元，用于确定第一预定周期内，所述初始化结束后的正向延时门限值减去每个业务流分片的正向延时实时值的差值超出限定值的次数达到第一阈值时，返回执行所述初始化。
在第三方面的第五种可能的实现方式中，所述本端设备的接收模块还包括：
第三处理单元，用于确定第二预定周期内，每个业务流分片的正向延时实时值小于所述业务流分片进入业务缓存单元的等待时间的次数达到第二阈值时，返回执行所述初始化。
第四方面，提供了一种通信系统，包括：
对端设备的发送模块和上述第三方面或第三方面的任意一种可能的实现方式所提供的本端设备的接收模块。
在第四方面的第一种可能的实现方式中，所述通信系统还包括转发模块。
通过本发明实施方式，接收模块在初始化时间开始时，清除正向延时门限值和反向延时门限值；在初始化时间内，对每个业务流分片执行：确定当前业务流分片对应的正向延时实时值和所述当前业务流分片对应的反向延时门限值中的最大值大于正向延时门限值的当前值时，用所述最大值替换所述正向延时门限值的当前值。从而在初始化结束时确定出所述初始化结束后的延时门限值，将其应用于延时补偿，可以显著减小双向非对称延时抖动，防止因抖动超限造成的用户通讯异常的问题。
附图说明
图1为本发明实施例的通信网络延时抖动平滑初始化方法的流程图；
图2为本发明实施例方法的实现场景示意图；
图3为本发明实施例方法的第一应用场景示意图；
图4为本发明实施例方法的第二应用场景示意图；
图5为本发明实施例方法的第三应用场景示意图；
图6为本发明实施例方法的第四应用场景示意图；
图7为本发明实施例的本端设备的接收模块结构示意图；
图8为本发明实施例的本端设备的接收模块硬件结构示意图；
图9为本发明实施例的通信系统的结构示意图。
具体实施方式
本发明实施例提供一种通信网络延时抖动平滑方法、装置及系统，以实现对端设备的发送模块与本端设备的接收模块交互的业务场景中，显著减小双向非对称延时抖动，防止因抖动超限造成的用户通讯异常的问题。
下面通过具体实施例，分别进行详细的说明。
为使得本发明的发明目的、特征、优点能更加的明显和易懂，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚地描述，显然下面所描述的实施例仅仅是本发明一部分实施例，而非全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
本申请的说明书和权利要求书及附图中的术语“第一”、“第二”、“第三”和“第四”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”不是排他的。例如包括了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，还可以包括没有列出的步骤或单元。
本申请的说明书和权利要求书及附图中的术语“本端设备”是指通信网络的链路一端的设备；“对端设备”是指通信网络的链路另一端的设备。
图1为本发明实施例的通信网络延时抖动平滑初始化方法的流程图，如图1所示，该方法可以包括：
S102，本端设备的接收模块在初始化时间开始时，清除正向延时门限值和反向延时门限值。
举例说明，对于带传输的业务流来讲，通信网络的链路是双方向的。对于一个方向，业务流在通信网络的链路一端的设备上进行业务帧映射，形成业务帧，在通信网络的链路另一端的设备上进行业务帧解映射，形成业务流分片，并通过读出业务流分片恢复成连续的业务流。对于另一个方向，也是如此。对于业务流的双向传输的过程，虽然执行的过程是相同的，但是双向的延时可能是不同的，因此存在着双向非对称延时抖动。本端设备上可以包括发送模块和接收模块；对端设备上可以包括发送模块和接收模块。发送模块可以实现业务帧映射的功能，接收模块可以实现业务帧解映射的功能。如此这样，可以将业务流从对端设备的发送模块流向本端设备的接收模 块的方向称为业务流正向，将业务流从本端设备的发送模块流向对端设备的接收模块的方向称为业务流反向。例如，C-RAN网络中的BBU设备和RRU设备分别设置于通信网络的链路的两端，在BBU设备上可以设置发送模块和接收模块，对应的，在RRU设备设备上同样可以设置发送模块和接收模块。
举例说明，为了获取准确的延时补偿，可以在接收模块上执行初始化过程。以在本端设备的接收模块上执行初始化过程为例，本端设备的接收模块确定在初始化时间开始时，清除正向延时门限值和反向延时门限值。其中，所述正向延时门限值是由本端设备的接收模块确定的，并可以通过同步手段同步到对端设备的发送模块；所述反向延时门限值是由对端设备的接收模块确定的，并可以将所述反向延时门限值同步到本端设备的发送模块。其中，所述初始化时间是指初始化过程经历的时间段，举例来讲，初始化时间可以用开始时间和结束时间来表示，例如，初始化开始时间为12:00，初始化开始时间为12:15，如此这样初始化过程经历的时间段为15分钟。所述初始化时间可以通过人工方式配置，也可以由本端设备的接收模块根据控制策略自动生成和自动调整，例如，本端设备的接收模块初始时自动将初始化时间设定为5分钟，初始化完成后，在后期补偿过程中，发现初始化过程获得的结果超出了一定阈值范围，需要修正的，那么，本端设备的接收模块将重新触发初始化，并且自动调整初始化时间段，比如调整成10分钟。
举例说明，对于清除正向延时门限值和反向延时门限值的操作。由于在初始化阶段开始时，正向延时门限值和反向延时门限值可能存储有历史值，例如上一次初始化过程确定的正向延时门限值和反向延时门限值。为了不影响本次初始化过程的效果，因此，在每次初始化过程的开始时刻清除正向延时门限值和反向延时门限值。
S104，所述本端设备的接收模块确定当前业务流分片对应的正向延时实时值，接收对端设备的发送模块发送的所述当前业务流分片对应的反向 延时门限值。
举例说明，业务流是连续传送的，相应的，业务帧也是连续不断的从通信网络的链路一段传输到另一端，例如，业务帧从对端设备的发送模块传输到本端设备的接收模块。在初始化时间中有多个业务帧传输，到达本端设备的接收模块后通过解映射，形成业务流分片。本端设备的接收模块确定当前业务流分片对应的正向延时实时值。其中所述正向延时实时值是指业务帧在通信网络的链路上传输所经历的延时。举例来讲，当对端设备的发送模块通过对业务流进行业务帧映射操作，形成业务帧，当所述业务帧进入通信网络的链路的时刻，对端设备的发送模块进行延时测量，标识出口时戳。所述出口时戳信息可以同步到本端设备的接收模块。本端设备的接收模块在从通信网络的链路接收到所述业务帧时，进行延时测量，标识入口时戳。如此这样，入口时戳和出口时戳就是当前业务流分片对应的正向延时实时值。
举例说明，本端设备的接收模块接收对端设备的发送模块发送的所述当前业务流分片对应的反向延时门限值。对端设备的接收模块根据业务流反向传输路径，可以确定出反向延时门限值，这样，对端设备的发送模块可以通过同步方式将所述当前业务流分片对应的反向延时门限值发送到本端设备的接收模块。从而，本端设备的接收模块可以获取当前业务流分片对应的正向延时实时值和所述当前业务流分片对应的反向延时门限值。
S106，所述本端设备的接收模块确定所述当前业务流分片对应的正向延时实时值和所述当前业务流分片对应的反向延时门限值中的最大值大于正向延时门限值的当前值时，用所述最大值替换所述正向延时门限值的当前值。
举例说明，例如，本端设备的接收模块在获取当前业务流分片对应的正向延时实时值和所述当前业务流分片对应的反向延时门限值后，确定出两个值的最大值，用所述最大值与正向延时门限值的当前值进行比较，当所 述最大值大于正向延时门限值的当前值时，用所述最大值替换所述正向延时门限值的当前值。又例如，当所述最大值小于或等于正向延时门限值的当前值时，保持正向延时门限值的当前值不变。
S108，所述本端设备的接收模块确定初始化时间未结束时，返回执行获取下一业务流分片对应的正向延时实时值和所述下一业务流分片对应的反向延时门限值。
举例说明，本端设备的接收模块确定初始化时间未结束时，返回所述S104，获取下一业务流分片对应的正向延时实时值和所述下一业务流分片对应的反向延时门限值。所述获取过程与上述针对所述S104的说明类似，此处不进行赘述。本端设备的接收模块在获取下一业务流分片对应的正向延时实时值和所述下一业务流分片对应的反向延时门限值后，执行S106，确定出两个值的最大值，再使用下一业务流分片对应的正向延时实时值和所述下一业务流分片对应的反向延时门限值的最大值与正向延时门限值的当前值进行比较，当大于正向延时门限值的当前值时，用下一业务流分片对应的最大值替换所述正向延时门限值的当前值。如此这样，在所述初始化时间内，反复执行所述S104和S106，直到所述初始化时间结束。从而，在所述初始化时间结束时，确定出初始化结束后的正向延时门限值。
举例说明，上述S102-S108中，以本端设备的接收模块为例，对初始化过程进行了说明。相对应的，对端设备的接收模块通过执行初始化过程可以确定出初始化结束后的反向门限延时值，对端设备的接收模块执行的初始化过程类似，此处不进行赘述。
举例说明，一方面，在通信系统启动时，传输业务流的通信网络的链路可能处于不平稳的状态，因此在通信系统启动时，可以执行初始化过程，从而确定出最佳的延时门限值。再一方面，例如，本端设备的接收模块进行初始化过程时，为了保证双向链路延时的一致性，对端设备的接收模块也进行初始化过程。有一方面，在初始化完成后的正常通信过程中，当满 足一定条件时，本端设备的接收模块触发重新初始化过程。
本实施例所提供的通信网络延时抖动平滑方法，本端设备的接收模块在初始化结束时确定出所述初始化结束后的延时门限值，将其应用于延时补偿，可以显著减小双向非对称延时抖动，防止因抖动超限造成的用户通讯异常的问题。
可选的，当完成上述初始化之后，一种补偿方法，包括：所述本端设备的接收模块确定所述初始化结束后的正向延时门限值大于第一业务流分片对应正向延时实时值时，将所述初始化结束后的正向延时门限值与所述第一业务流分片对应正向延时实时值之间的差值作为所述第一业务流分片的延时补偿时间。
举例说明，在完成初始化过程后，将进入正常的通信状态。例如本端设备的接收模块，在执行完初始化过程后，能够确定出初始化结束后的正向延时门限值。当本端设备的接收模块处理第一业务流分片时，能够确定出所述初始化结束后的正向延时门限值大于第一业务流分片对应正向延时实时值时，将所述初始化结束后的正向延时门限值与所述第一业务流分片对应正向延时实时值之间的差值作为所述第一业务流分片的延时补偿时间。例如，可以通过控制第一业务流分片在业务缓存单元中的停留时间来控制延时补偿时间。这样，对于正常通信期间的每个第一业务流分片都可以执行同样操作，实现对每个业务流分片的延时补偿，显著减小双向非对称延时抖动，防止因抖动超限造成的用户通讯异常的问题。
举例说明，当所述初始化结束后的正向延时门限值小于第一业务流分片对应正向延时实时值时，则不需要对所述第一业务流分片进行延时补偿。例如，第一业务流分片在业务缓存单元中不进行停留。
可选的，所述本端设备的接收模块在接收到所述对端设备的发送模块发送的重新初始化信号时，返回执行所述初始化过程。
举例说明，本端设备的接收模块在开始进行初始化时，将会利用本端 设备的发送模块向对端设备的接收模块发送重新初始化信号，通知对端设备的接收模块也进行初始化。也就是说，当一端的接收模块初始化开始时，另一端的接收模块也执行初始化过程。例如，在正常的通信过程中，本端设备的接收模块触发初始化过程，同时也会通知对端设备的接收模块也触发初始化过程。
举例说明，本端设备和对端设备上的接收模块的初始化过程可以是同步的。例如，当本端设备的接收模块准备进行初始化过程时，可以先向对端设备的发送模块同步一个重新初始化信号，重新初始化信号包括了初始化开始时刻和结束时刻。因此，两端的接收模块可以在同样的时间周期内执行初始化过程。
举例说明，两端的接收模块的初始化过程也可以不同步。例如，在初始化阶段，本端设备的接收模块确定的正向延时门限值需要被同步到对端设备的发送模块；同样，对端设备的接收模块确定的反向延时门限值需要被同步到本端设备的发送模块。而在正常通信阶段，正向延时门限值和反向延时门限值是不需要被同步的。因此，可以使用正向延时门限值或反向延时门限值作为重新初始化信号。举例来讲，本端设备的接收模块在进行初始化开始时，本端设备的接收模块确定的第一个正向延时门限值被同步到对端设备的发送模块，对端设备的发送模块接收到第一个正向延时门限值时通知对端设备的接收模块，所述对端设备的接收模块触发初始化过程，这样，对端设备的接收模块确定的第一个反向延时门限值也被同步到本端设备的发送模块，如此这样，两端的接收模块都进行了初始化过程。对于初始化结束时间，两端的接收模块不要求同步。例如，本端设备的接收模块已经结束的初始化，而对端设备的接收模块还没有结束初始化，这种情况下，本端设备的接收模块可能还会受到对端同步的反向延时门限，只需要本端设备的接收模块初始化结束后不再对接收到的反向延时门限进行处理即可。同时，为了不影响下次初始化，对接收而不处理反向延时门限的 时间周期进行一定的限定即可。
可选的，所述本端设备的接收模块确定业务通道状态为异常时，返回执行所述初始化过程。
举例说明，在正常的通信过程中，接收模块对业务通道状态进行监测，例如，本端设备的接收模块对业务流正向的通道状态进行监测，对端设备的接收模块对业务流反向的通道状态进行监测。当本端设备的接收模块确定业务通道状态为异常时，重新进行初始化过程。
可选的，所述本端设备的接收模块确定第一预定周期内，所述初始化结束后的正向延时门限值减去每个业务流分片的正向延时实时值的差值超出限定值的次数达到第一阈值时，返回执行所述初始化过程。
举例说明，在初始化结束后的正常通信过程中，本端设备的接收模块根据初始化结束后的正向延时门限值对每个业务流分片进行相应的补偿处理。当本端设备的接收模块确定第一预定周期内，所述初始化结束后的正向延时门限值减去每个业务流分片的正向延时实时值的差值超出限定值的次数达到第一阈值时，返回执行所述初始化过程。根据本实施例上述的说明，所述初始化结束后的正向延时门限值可能大于或小于所述业务流分片的正向延时实时值，那么所述初始化结束后的正向延时门限值减去每个业务流分片的正向延时实时值的差值可能是正值或负值，因此所述限定值是一个范围，而不是一个单一值。如果在所述第一周期内，多次出现所述差值超出了所述限定值限定的取值范围的情况，则说明目前的正向延时门限值已经无法适用于正常通信过程中的延时抖动的改善。因此当所述次数达到第一阈值时，重新执行初始化过程，进而，重新确定正向延时门限值。
可选的，所述本端设备的接收模块确定第二预定周期内，每个业务流分片的正向延时实时值小于所述业务流分片进入业务缓存单元的等待时间的次数达到第二阈值时，返回执行所述初始化过程。
举例说明，在初始化结束后的正常通信过程中，本端设备的接收模块 根据初始化结束后的正向延时门限值对每个业务流分片进行相应的补偿处理。当本端设备的接收模块确定第二预定周期内，每个业务流分片的正向延时实时值小于所述业务流分片进入业务缓存单元的等待时间的次数达到第二阈值时，返回执行所述初始化过程。根据本实施例前面的说明，当确定出所述初始化结束后的正向延时门限值大于第一业务流分片对应正向延时实时值时，将所述初始化结束后的正向延时门限值与所述第一业务流分片对应正向延时实时值之间的差值作为所述第一业务流分片的延时补偿时间。在实现上，例如，可以通过控制第一业务流分片在业务缓存单元中的停留时间来控制延时补偿时间。例如，所述延时补偿时间是60纳秒，那么该业务流分片在业务缓存单元中的停留时间可以设置为60纳秒。当然，业务流分片是连续不断的，业务缓存单元有可能由于停留的业务流分片过多，导致无法吸收再多的业务流分片，那么待进入的业务流分片可能会等待进入业务缓存单元，这就产生了等待时间。例如，所述延时补偿时间是60纳秒，该业务流分片进入业务缓存单元的等待时间是10纳秒，那么该业务流分片在业务缓存单元中的停留时间可以设置为50纳秒。也就是说，要将等待时间在补偿时间中扣除。当然，又例如，所述延时补偿时间是60纳秒，该业务流分片进入业务缓存单元的等待时间是70纳秒，那么该业务流分片在业务缓存单元中将不做停留。因此，如果等待时间过长或经常处于等待时间过长的状况，则说明前次初始化过程确定的延时门限值已经不能适用了，需要重新初始化确定新的延时门限值。
举例说明，在上述说明的，初始化过程和正常通信状态中发生的根据条件进行重新初始化的过程，是以本端设备的接收模块确定正向延时门限值的方式进行说明的。但实际上，对端设备的接收模块确定反向延时门限值的方式与上述说明类似，此处不再赘述。
在不采用本发明实施例方案的通常实现方式中，为了改善双向非对称延时抖动的问题，往往通过提高通信设备的时钟精度，从而确定更加准确 的同步过程；或者，使用固定的延时补偿值进行双向链路延时的补偿。这种常规的方法无法形成动态的补偿方式，特别的，当通信路径发生变化或出现异常状况时，无法自动的调整补偿策略，无法达到改善双向非对称延时抖动的目的。
然而，本发明实施例提供的技术方案中，接收模块在初始化结束时确定出所述初始化结束后的延时门限值，将其应用于延时补偿；并且在满足一定条件后，重新触发初始化过程。保证了动态的补偿方式，并当通信路径发生变化或出现异常状况时，自动的调整补偿策略，显著减小双向非对称延时抖动，防止因抖动超限造成的用户通讯异常的问题。
图2为本发明实施例方法的实现场景示意图。图2从业务流流向和信号传送方式的角度更加具体的说明了通信网络延时抖动平滑过程。图中，展示了本端设备的接收模块和对端设备的发送模块，但在实际应用中，本端设备还可以包括发送模块，对端设备还可以包括接收模块，其结构是对应相同的，因此下面的说明以本端设备的接收模块和对端设备的发送模块为例进行说明。
举例说明，发送模块包括业务帧映射单元、高精度时钟同步单元、高精度时间同步单元、延时测量单元、双向延时门限同步单元、业务通道监测单元；接收模块包括业务帧解映射单元、高精度时钟同步单元、高精度时间同步单元、延时测量单元、双向延时门限同步单元、业务通道监测单元、正向延时门限调整单元、延时补偿单元和业务流缓存单元。另外，当发送模块和接收模块距离较远时，所述发送模块和接收模块之间还可以包括转发模块，所述转发模块包括业务帧转发单元，用于实现对业务帧的转发。
举例说明，上述各个单元实现的功能如下。
所述业务帧映射单元，将业务流转换成与所处理的业务转发模式相匹配的业务帧。例如在FrontHaul网络中，业务流被转换成与FrontHaul转发模式相匹配的FH帧。
所述业务帧转发单元，实现对业务帧的转发。例如在FrontHaul网络中， 负责将FH帧按照Fronthaul转发规则从发送模块传送至接收模块。
所述业务帧解映射单元，负责将业务帧恢复成业务流分片。例如在FrontHaul网络中，将FH帧恢复成业务流分片。
所述业务流缓存单元，负责缓存恢复的业务流分片，当停留时间满足读出条件时，读出业务流分片并恢复成连续的业务流从接收模块发送出去。
所述高精度时钟同步单元，负责发送模块和接收模块的精确时钟信息交互，实现高精度时钟同步。其中时钟同步信息可以通过业务帧传递，也可以通过独立的时钟消息传递。
所述高精度时间同步单元，负责发送模块和接收模块的精确时间信息交互，实现高精度时间同步。其中时间同步信息可以通过业务帧传递，也可以通过独立的时间消息传递。
所述延时测量单元，负责业务帧穿过通信网络的链路的延时测量，通过记录业务帧在通信网络的链路的两端的出入口时间戳计算时差的方式实现。其中时间戳信息可以通过业务帧传递，也可以通过独立的延时测量信息传递。
所述双向延时门限同步单元，负责发送模块和接收模块的延时门限值的实时同步。其中延时门限值可以通过业务帧传递，也可以通过独立的延时门限消息传递。
所述业务通道监测单元，负责对业务通道状态的监测。其中故障检测信息可以通过业务帧传递，也可以通过独立的故障检测消息传递。
所述正向延时门限调整单元，负责通过初始化过程，完成正向路径延时门限值的计算和调整。
所述延时补偿单元，负责利用初始化结束后的正向延时门限值与业务流分片对应正向延时实时值计算延时补偿时间，控制业务流缓存单元执行补偿。
举例说明，基于上述各个单元，通信网络延时抖动平滑过程的实现方式是：所述正向延时门限调整单元实现通信网络延时抖动平滑的初始化方法， 包括：
所述正向延时门限调整单元，用于在初始化时间开始时，清除正向延时门限值和反向延时门限值；
所述正向延时门限调整单元，用于确定当前业务流分片对应的正向延时实时值，接收发送模块发送的所述当前业务流分片对应的反向延时门限值；
所述正向延时门限调整单元，用于确定所述当前业务流分片对应的正向延时实时值和所述当前业务流分片对应的反向延时门限值中的最大值大于正向延时门限值的当前值时，用所述最大值替换所述正向延时门限值的当前值；
所述正向延时门限调整单元，用于确定初始化时间未结束时，返回执行获取下一业务流分片对应的正向延时实时值和所述下一业务流分片对应的反向延时门限值。
可选的，基于上述初始化方法的补偿方法，包括：所述延时补偿单元，用于确定所述初始化结束后的正向延时门限值大于第一业务流分片对应正向延时实时值时，将所述初始化结束后的正向延时门限值与所述第一业务流分片对应正向延时实时值之间的差值作为所述第一业务流分片的延时补偿时间。
可选的，所述正向延时门限调整单元，用于在接收到发送模块发送的重新初始化信号时，返回执行所述初始化。
可选的，所述正向延时门限调整单元，用于确定业务通道状态为异常时，返回执行所述初始化。
可选的，所述正向延时门限调整单元，用于确定第一预定周期内，所述初始化结束后的正向延时门限值减去每个业务流分片的正向延时实时值的差值超出限定值的次数达到第一阈值时，返回执行所述初始化。
可选的，所述正向延时门限调整单元，用于确定第二预定周期内，每 个业务流分片的正向延时实时值小于所述业务流分片进入业务缓存单元的等待时间的次数达到第二阈值时，返回执行所述初始化。
图2所示的本发明实施例方法的实现场景示意图，图2中各单元可以执行上述实施例的方法中的相应步骤。接收模块在初始化结束时确定出所述初始化结束后的延时门限值，将其应用于延时补偿；并且在满足一定条件后，重新触发初始化过程。保证了动态的补偿方式，并当通信路径发生变化或出现异常状况时，自动的调整补偿策略，显著减小双向非对称延时抖动，防止因抖动超限造成的用户通讯异常的问题。
图3为本发明实施例方法的第一应用场景示意图。图3通过分组传送网(英文全称：Packet transport network，英文缩写：PTN)节点实现FrontHaul网络。图中RRU和BBU通过通用公共无线接口(英文全称：Common public radio interface，英文缩写：CPRI)连接PTN节点，PTN节点之间通过以太网(Ethernet)接口连接。PTN1和PTN3节点上分别部署了发送模块和接收模块，从而分别承担了业务流正向和业务流反向的传输工作。而且，还可以包括在PTN2节点上部署的转发模块。PTN1和PTN3之间的通信网络的链路形成了双向非对称延时抖动平滑域。图3中各单元可以执行上述实施例的方法中的相应步骤，在此不进行赘述。
图4为本发明实施例方法的第二应用场景示意图。图4与图3的结构不同之处仅在于：将PTN1中的发送模块和接收模块移植到RRU设备中，将PTN3中的发送模块和接收模块移植到BBU设备中。PTN1、PTN2、PTN3只承担转发。因此BBU和RRU之间的通信网络的链路形成了双向非对称延时抖动平滑域。图4中各单元可以执行上述实施例的方法中的相应步骤，在此不进行赘述。
图5为本发明实施例方法的第三应用场景示意图。图5通过光传送网(英文全称：Optical transport network，英文缩写：OTN)节点实现FrontHaul网络。图中RRU和BBU通过CPRI接口连接OTN节点，OTN节点之间通过波分复用(英文全称：Wavelength division multiplexing，英文缩写：WDM)接口连接。 OTN1和OTN3节点上分别部署了发送模块和接收模块，从而分别承担了业务流正向和业务流反向的传输工作。而且，还可以包括在OTN2节点上部署的转发模块。OTN1和OTN3之间的通信网络的链路形成了双向非对称延时抖动平滑域。图5中各单元可以执行上述实施例的方法中的相应步骤，在此不进行赘述。
图6为本发明实施例方法的第四应用场景示意图。图6通过PTN节点实现电力通信网络，具体实现了变电站A和变电站B的继电保护系统的通信。图中变电站A继电保护系统和变电站B继电保护系统通过E1接口连接PTN节点，PTN节点之间通过以太网接口连接。PTN1和PTN3节点上分别部署了发送模块和接收模块，从而分别承担了业务流正向和业务流反向的传输工作。而且，还可以包括在PTN2节点上部署的转发模块。PTN1和PTN3之间的通信网络的链路形成了双向非对称延时抖动平滑域。图6中各单元可以执行上述实施例的方法中的相应步骤，在此不进行赘述。
图7为本发明实施例的本端设备的接收模块结构示意图；图7对应的本端设备的接收模块可以执行上述实施例的方法中的相应步骤。如图7所示，所述本端设备的接收模块包括用于执行初始化的设置单元702、用于执行初始化的获取单元704、用于执行初始化的确定单元706和用于执行初始化的返回单元708：
所述设置单元702，用于在初始化时间开始时，清除正向延时门限值和反向延时门限值；
所述获取单元704，用于确定当前业务流分片对应的正向延时实时值，接收对端设备的发送模块发送的所述当前业务流分片对应的反向延时门限值；
所述确定单元706，用于确定所述当前业务流分片对应的正向延时实时值和所述当前业务流分片对应的反向延时门限值中的最大值大于正向延时门限值的当前值时，用所述最大值替换所述正向延时门限值的当前值；
所述返回单元708，用于确定初始化时间未结束时，返回执行获取下一业务流分片对应的正向延时实时值和所述下一业务流分片对应的反向延时门限值。
可选的，所述本端设备的接收模块还包括补偿单元，所述补偿单元用于确定所述初始化结束后的正向延时门限值大于第一业务流分片对应正向延时实时值时，将所述初始化结束后的正向延时门限值与所述第一业务流分片对应正向延时实时值之间的差值作为所述第一业务流分片的延时补偿时间。
可选的，所述本端设备的接收模块还包括处理单元，所述处理单元用于在接收到所述对端设备的发送模块发送的重新初始化信号时，返回执行所述初始化。
可选的，所述本端设备的接收模块还包括第一处理单元，所述第一处理单元用于确定业务通道状态为异常时，返回执行所述初始化。
可选的，所述本端设备的接收模块还包括第二处理单元，所述第二处理单元用于确定第一预定周期内，所述初始化结束后的正向延时门限值减去每个业务流分片的正向延时实时值的差值超出限定值的次数达到第一阈值时，返回执行所述初始化。
可选的，所述本端设备的接收模块还包括第三处理单元，所述第三处理单元用于确定第二预定周期内，每个业务流分片的正向延时实时值小于所述业务流分片进入业务缓存单元的等待时间的次数达到第二阈值时，返回执行所述初始化。
图7所示的本端设备的接收模块可以执行上述实施例的方法中的相应步骤。对端设备的接收模块的结构与本端设备的接收模块的结构相同，此处不再赘述。接收模块在初始化结束时确定出所述初始化结束后的延时门限值，将其应用于延时补偿；并且在满足一定条件后，重新触发初始化过程。保证了动态的补偿方式，并当通信路径发生变化或出现异常状况时，自动 的调整补偿策略，显著减小双向非对称延时抖动，防止因抖动超限造成的用户通讯异常的问题。
图8为本发明实施例的本端设备的接收模块硬件结构示意图。图8对应的本端设备的接收模块可以执行上述实施例的方法中的相应步骤。
如图8所示，本端设备的接收模块包括处理器801、存储器802、接口803和总线804，其中接口803可以通过无线或有线的方式实现，具体来讲可以是例如网卡等元件，上述处理器801、存储器802、接口803通过总线804连接。
所述存储器802，存储程序代码，可选的，程序代码可以包括操作系统程序和应用程序。
所述处理器801，执行初始化过程：
所述处理器801，在初始化时间开始时，清除正向延时门限值和反向延时门限值；
所述处理器801，确定当前业务流分片对应的正向延时实时值，所述处理器801通过所述接口803，接收对端设备的发送模块发送的所述当前业务流分片对应的反向延时门限值；
所述处理器801，确定所述当前业务流分片对应的正向延时实时值和所述当前业务流分片对应的反向延时门限值中的最大值大于正向延时门限值的当前值时，用所述最大值替换所述正向延时门限值的当前值；
所述处理器801，确定初始化时间未结束时，返回执行获取下一业务流分片对应的正向延时实时值和所述下一业务流分片对应的反向延时门限值。
可选的，所述处理器801，确定所述初始化结束后的正向延时门限值大于第一业务流分片对应正向延时实时值时，将所述初始化结束后的正向延时门限值与所述第一业务流分片对应正向延时实时值之间的差值作为所述第一业务流分片的延时补偿时间。
可选的，所述处理器801，在接收到所述对端设备的发送模块发送的重 新初始化信号时，返回执行所述初始化。
可选的，所述处理器801，确定业务通道状态为异常时，返回执行所述初始化。
可选的，所述处理器801，确定第一预定周期内，所述初始化结束后的正向延时门限值减去每个业务流分片的正向延时实时值的差值超出限定值的次数达到第一阈值时，返回执行所述初始化。
可选的，所述存储器802包括业务缓存单元，所述处理器801，确定第二预定周期内，每个业务流分片的正向延时实时值小于所述业务流分片进入业务缓存单元的等待时间的次数达到第二阈值时，返回执行所述初始化。
图8所示的本端设备的接收模块可以执行上述实施例的方法中的相应步骤。对端设备的接收模块的结构与本端设备的接收模块的结构相同，此处不再赘述。接收模块在初始化结束时确定出所述初始化结束后的延时门限值，将其应用于延时补偿；并且在满足一定条件后，重新触发初始化过程。保证了动态的补偿方式，并当通信路径发生变化或出现异常状况时，自动的调整补偿策略，显著减小双向非对称延时抖动，防止因抖动超限造成的用户通讯异常的问题。
图9为本发明实施例的通信系统的结构示意图。本发明实施例提供的通信系统可以包括对端设备的发送模块和前述图7或图8对应的实施例提供的本端设备的接收模块，在此不再对接收模块进行赘述。
可选的，所述系统还包括转发模块。所述转发模块设置于对端设备的发送模块和本端设备的接收模块之间的通信网络的链路上，所述转发模块用于业务帧的转发。
本领域普通技术人员将会理解，本发明的各个方面、或各个方面的可能实现方式可以被具体实施为系统、方法或者计算机程序产品。因此，本发明的各方面、或各个方面的可能实现方式可以采用完全硬件实施例、完全软件实施例(包括固件、驻留软件等等)，或者组合软件和硬件方面的实 施例的形式，在这里都统称为“电路”、“模块”或者“系统”。此外，本发明的各方面、或各个方面的可能实现方式可以采用计算机程序产品的形式，计算机程序产品是指存储在计算机可读介质中的计算机可读程序代码。
计算机可读介质可以是计算机可读信号介质或者计算机可读存储介质。计算机可读存储介质包含但不限于电子、磁性、光学、电磁、红外或半导体系统、设备或者装置，或者前述的任意适当组合，如随机存取存储器(英文全称：Random access memory，英文缩写：RAM)、只读存储器(英文全称：Read-only memory，英文缩写：ROM)、可擦除可编程只读存储器((英文全称：Erasable programmable read only memory,英文缩写：EPROM)或者快闪存储器)、光纤、便携式只读存储器(英文全称：Compact disc read-only memory，英文缩写：CD-ROM)。
计算机中的处理器读取存储在计算机可读介质中的计算机可读程序代码，使得处理器能够执行在流程图中每个步骤、或各步骤的组合中规定的功能动作；生成实施在框图的每一块、或各块的组合中规定的功能动作的装置。
计算机可读程序代码可以完全在用户的本地计算机上执行、部分在用户的本地计算机上执行、作为单独的软件包、部分在用户的本地计算机上并且部分在远程计算机上，或者完全在远程计算机或者服务器上执行。也应该注意，在某些替代实施方案中，在流程图中各步骤、或框图中各块所注明的功能可能不按图中注明的顺序发生。例如，依赖于所涉及的功能，接连示出的两个步骤、或两个块实际上可能被大致同时执行，或者这些块有时候可能被以相反顺序执行。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (14)

  1. 一种通信网络延时抖动平滑的初始化方法，其特征在于，包括：
    本端设备的接收模块在初始化时间开始时，清除正向延时门限值和反向延时门限值；
    所述本端设备的接收模块确定当前业务流分片对应的正向延时实时值，接收对端设备的发送模块发送的所述当前业务流分片对应的反向延时门限值；
    所述本端设备的接收模块确定所述当前业务流分片对应的正向延时实时值和所述当前业务流分片对应的反向延时门限值中的最大值大于正向延时门限值的当前值时，用所述最大值替换所述正向延时门限值的当前值；
    所述本端设备的接收模块确定初始化时间未结束时，返回执行获取下一业务流分片对应的正向延时实时值和所述下一业务流分片对应的反向延时门限值。
  2. 一种补偿方法，其特征在于，该补偿方法应用于权利要求1所述的初始化时间结束后，该补偿方法包括：
    所述本端设备的接收模块确定所述初始化结束后的正向延时门限值大于第一业务流分片对应正向延时实时值时，将所述初始化结束后的正向延时门限值与所述第一业务流分片对应正向延时实时值之间的差值作为所述第一业务流分片的延时补偿时间。
  3. 根据权利要求2所述的方法，其特征在于，
    所述本端设备的接收模块在接收到所述对端设备的发送模块发送的重新初始化信号时，返回执行所述权利要求1的所述初始化。
  4. 根据权利要求2所述的方法，其特征在于，
    所述本端设备的接收模块确定业务通道状态为异常时，返回执行所述权利要求1的所述初始化。
  5. 根据权利要求2所述的方法，其特征在于，
    所述本端设备的接收模块确定第一预定周期内，所述初始化结束后的正向延时门限值减去每个业务流分片的正向延时实时值的差值超出限定值的次数达到第一阈值时，返回执行所述权利要求1的所述初始化。
  6. 根据权利要求2所述的方法，其特征在于，
    所述本端设备的接收模块确定第二预定周期内，每个业务流分片的正向延时实时值小于所述业务流分片进入业务缓存单元的等待时间的次数达到第二阈值时，返回执行所述权利要求1的所述初始化。
  7. 一种本端设备的接收模块，其特征在于，所述本端设备的接收模块包括用于执行初始化的设置单元、用于执行初始化的获取单元、用于执行初始化的确定单元和用于执行初始化的返回单元，其中：
    所述设置单元，用于在初始化时间开始时，清除正向延时门限值和反向延时门限值；
    所述获取单元，用于确定当前业务流分片对应的正向延时实时值，接收对端设备的发送模块发送的所述当前业务流分片对应的反向延时门限值；
    所述确定单元，用于确定所述当前业务流分片对应的正向延时实时值和所述当前业务流分片对应的反向延时门限值中的最大值大于正向延时门限值的当前值时，用所述最大值替换所述正向延时门限值的当前值；
    所述返回单元，用于确定初始化时间未结束时，返回执行获取下一业务流分片对应的正向延时实时值和所述下一业务流分片对应的反向延时门限值。
  8. 根据权利要求7所述的本端设备的接收模块，其特征在于，所述本端设备的接收模块还包括补偿单元，所述补偿单元用于确定所述初始化结束后的正向延时门限值大于第一业务流分片对应正向延时实时值时，将所述初始化结束后的正向延时门限值与所述第一业务流分片对应正向延时实时值之间的差值作为所述第一业务流分片的延时补偿时间。
  9. 根据权利要求8所述的本端设备的接收模块，其特征在于，所述本 端设备的接收模块还包括处理单元，所述处理单元用于在接收到所述对端设备的发送模块发送的重新初始化信号时，返回执行所述初始化。
  10. 根据权利要求8所述的本端设备的接收模块，其特征在于，所述本端设备的接收模块还包括第一处理单元，所述第一处理单元用于确定业务通道状态为异常时，返回执行所述初始化。
  11. 根据权利要求8所述的本端设备的接收模块，其特征在于，所述本端设备的接收模块还包括第二处理单元，所述第二处理单元用于确定第一预定周期内，所述初始化结束后的正向延时门限值减去每个业务流分片的正向延时实时值的差值超出限定值的次数达到第一阈值时，返回执行所述初始化。
  12. 根据权利要求8所述的本端设备的接收模块，其特征在于，所述本端设备的接收模块还包括第三处理单元，所述第三处理单元用于确定第二预定周期内，每个业务流分片的正向延时实时值小于所述业务流分片进入业务缓存单元的等待时间的次数达到第二阈值时，返回执行所述初始化。
  13. 一种通信系统，其特征在于，所述通信系统包括对端设备的发送模块和权利要求7至12任一项所述的本端设备的接收模块。
  14. 根据权利要求13所述的系统，其特征在于，所述通信系统还包括转发模块。
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