WO2015106504A1 - 调整差分时钟频率方法、装置、系统、源端设备和互通修改器 - Google Patents

调整差分时钟频率方法、装置、系统、源端设备和互通修改器 Download PDF

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Publication number
WO2015106504A1
WO2015106504A1 PCT/CN2014/076410 CN2014076410W WO2015106504A1 WO 2015106504 A1 WO2015106504 A1 WO 2015106504A1 CN 2014076410 W CN2014076410 W CN 2014076410W WO 2015106504 A1 WO2015106504 A1 WO 2015106504A1
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Prior art keywords
differential
cbr service
frequency information
frequency
differential frequency
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PCT/CN2014/076410
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English (en)
French (fr)
Inventor
张思栋
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中兴通讯股份有限公司
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Publication of WO2015106504A1 publication Critical patent/WO2015106504A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • H04J3/0635Clock or time synchronisation in a network
    • H04J3/0638Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0658Clock or time synchronisation among packet nodes

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a system, a source device, and an interworking modifier for adjusting a differential clock frequency. Background technique
  • CBR Constant Bit Rate
  • the frequency of the CB service data is different from the reference frequency of the transmitting end to generate a differential frequency.
  • the CBR service data needs to recover the clock (frequency) of the CBR service data at the receiving end, so that the correct CBR service data can be obtained.
  • the three existing clock recovery methods include: retiming mode, differential clock mode, and adaptive clock mode.
  • the basic principle of the differential clock recovery standard algorithm is: generating differential frequency information of CBR service data according to the reference frequency used by the source device, and transmitting the CBR service data and its differential frequency information to the sink device, and the sink device
  • the CB service data is recovered according to the received differential frequency information. Further, when the clock recovery is performed, only the reference frequency used by the source device and the sink device is the same, that is, the differential clock frequency between the source device and the sink device is mutually communicated, so that the CBR service data can be correctly restored.
  • embodiments of the present invention provide a method, an apparatus, a system, a source device, and an interworking modifier for adjusting a differential clock frequency.
  • Embodiments of the present invention provide a method of adjusting a differential clock frequency.
  • the method includes: receiving a fixed code rate CBR service packet, where the CBR service packet includes first differential frequency information corresponding to a first reference frequency supported by the source device; Converting the first differential frequency information in the CBR service packet message to the second differential frequency information, where the second differential frequency information corresponds to the second reference frequency supported by the sink device; and the CBR service including the second differential frequency information
  • the packet packet is sent to the sink device, and processed by the sink device to implement differential clock frequency interworking.
  • An embodiment of the present invention provides an apparatus for adjusting a differential clock frequency, including: a receiving module, configured to receive a fixed code rate CBR service packet, where the CBR service packet includes and the source device support The first differential frequency information corresponding to the first reference frequency; the conversion module is configured to convert the first differential frequency information in the CBR service packet message into second differential frequency information, where the second differential frequency information Corresponding to a second reference frequency supported by the sink device; the sending module is configured to send the CBR service packet containing the second differential frequency information to the sink device, and the sink device processes the differential clock. Frequency interoperability.
  • the embodiment of the present invention further provides an interworking modifier, including: a packet message receiver, a differential frequency modifier, and a packet message transmitter, where: a packet message receiver configured to receive a CBR service packet;
  • the CBR service packet includes a first differential frequency information corresponding to the first reference frequency supported by the source device, and a differential frequency modifier configured to: first difference in the CBR service packet
  • the frequency information is converted into the second differential frequency information, where the second differential frequency information corresponds to the second reference frequency supported by the sink device;
  • the packet message transmitter is configured to report the CBR service packet including the second differential frequency information Text sent to the The sink device is processed by the sink device to implement differential clock frequency intercommunication.
  • the embodiment of the present invention further provides a source device, including: an access device configured to extract CBR service data from a CBR service data stream; and a differential frequency information generator configured to generate the CBR according to the first reference frequency The first differential frequency information of the service data; the packet packet encapsulator is configured to encapsulate the CBR service data and the first differential frequency information into CBR service packet messages.
  • a source device including: an access device configured to extract CBR service data from a CBR service data stream; and a differential frequency information generator configured to generate the CBR according to the first reference frequency The first differential frequency information of the service data; the packet packet encapsulator is configured to encapsulate the CBR service data and the first differential frequency information into CBR service packet messages.
  • the embodiment of the present invention further provides a system for adjusting a differential clock frequency, including: a source device, a device for adjusting a differential clock frequency, and a sink device; wherein: the source device is configured to generate a fixed code rate CBR service packet.
  • the device includes: a first differential frequency information corresponding to a first reference frequency supported by the source device; and a device for adjusting a differential clock frequency, configured to report the CBR service packet to the CBR service packet
  • the first differential frequency information is converted into the second differential frequency information, where the second differential frequency information corresponds to the second reference frequency supported by the sink device; the sink device is configured to restore the CBR service based on the second reference frequency
  • the CBR service data in the packet is used to implement differential clock frequency interworking.
  • the embodiment of the invention further provides a computer readable storage medium, the storage medium comprising a set of instructions for performing a method for adjusting a differential clock frequency according to an embodiment of the invention.
  • the differential frequency information of the CBR service data is modified, so that the two devices supporting different reference frequencies can correctly recover the CB service data, and the interworking of the differential clock frequencies between the devices supporting different reference frequencies is realized. , improve the accuracy of data recovery.
  • FIG. 1 is a block diagram of a system for adjusting a differential clock frequency according to an embodiment of the invention
  • FIG. 2 is a flow chart of a method for adjusting a differential clock frequency according to an embodiment of the invention
  • a block diagram of a device that adjusts the differential clock frequency A block diagram of a device that adjusts the differential clock frequency.
  • FIG. 1 is a structural diagram of a system for adjusting a differential clock frequency according to an embodiment of the present invention.
  • the system can include a source device 10 and a sink device 20.
  • the CB service data is accessed by the source device 10 to the packet network, and the sink device 20 receives the CBR service data through the packet network.
  • the CBR service data refers to fixed code rate data, and the fixed code rate data has a fixed number of bits transmitted per second.
  • the source device 10 is configured to generate a fixed rate rate CBR service packet, where the CBR service packet includes first differential frequency information corresponding to the first reference frequency supported by the source device 10.
  • the first differential frequency information of the CBR service data is differential frequency information generated according to a first reference frequency supported by the source device 10.
  • the source device 10 may include: an accessor 11, a differential frequency information generator 12, and a packet message encapsulator 13.
  • the accessor 11 is configured to extract CB service data in the CBR service data stream.
  • the accessor 11 can receive and parse the CBR service data stream, extract the service payload in the CBR service data stream, and transmit the service payload to the packet message encapsulator 13.
  • the service payload is a valid or substantial part of the CBR service data stream. This part of the data (service payload) can be called CBR service data.
  • the CBR service data stream can come from a base station device.
  • the differential frequency information generator 12 is configured to generate first differential frequency information of the CBR service data according to the first reference frequency.
  • the differential frequency information generator 12 may generate first differential frequency information of the CBR service data for the CBR service data in the packet message encapsulator 13 according to the first reference frequency used by the source device 10.
  • the reference frequency refers to the frequency supported by the device (source device, sink device), which can be used for counting, which can be obtained by
  • the count value (frequency time stamp) is used to represent the differential frequency information.
  • the packet packet encapsulator 13 is configured to encapsulate the CBR service data and its first differential frequency information into CBR service packet messages.
  • the packet packet encapsulator 13 encapsulates the first differential frequency information of the CBR service data and the CBR service data into a CBR service packet according to the packet encapsulation format of the packet service.
  • Both the source device and the sink device can support one or more reference frequencies.
  • the sink device cannot recover correctly for the CBR service data sent by the source device.
  • the reference frequency supported by the source device is 2.43 MHz
  • the reference frequency supported by the sink device is 19.44 MHz.
  • the sink device cannot correctly identify the differential frequency information of the CBR service packet at the same frequency as the reference frequency of the source device. This will cause the sink device to recover the CBR service data correctly using the differential frequency information generated by the source device.
  • Embodiments of the present invention support interworking of differential clock frequencies between source device 10 and sink device 20 of different reference frequencies by providing a system for adjusting the differential clock frequency (also referred to as interworking modifier 30).
  • the source device 10 and the sink device 20 can cause the sink device 20 to correctly parse the CBR service data through the interworking modifier 30 even if the supported reference frequencies are different.
  • the source device 10 can transmit the CBR service packet to the interworking modifier 30.
  • the interworking modifier 30 is configured to modify the differential frequency information in the received CBR service packet according to the reference frequency supported by the source device 10 and the sink device 20, and modify the CBR service after the differential frequency information is modified.
  • the packet message is sent to the sink device 20.
  • the modified differential frequency information corresponds to the reference frequency of the sink device 20, that is, the reference frequency of the sink device 20 can correctly recover the CBR service data by using the modified differential frequency information.
  • the interworking modifier 30 includes a packet message receiver 31, a differential frequency modifier 32, and a packet message transmitter 33.
  • the packet message encapsulator 13 in the source device 10 transmits the CBR service packet message to the packet message receiver 31 in the interworking modifier 30, and the packet message receiver 31 can receive
  • the CBR service packet message from the packet packet encapsulator 13 may be used by the differential frequency modifier 32 to convert the first differential frequency in the CBR service packet according to a conversion algorithm between differential frequency information at different reference frequencies set in advance.
  • the information is converted into second differential frequency information, wherein the second differential frequency information corresponds to a second reference frequency supported by the sink device 20.
  • the packet message sender 33 transmits the CBR service packet message modified with the differential frequency information to the sink device 20.
  • the sink device 20 is configured to receive the CBR service packet from the interworking modifier 30 (the packet message transmitter 33), and recover the CBR service data in the CBR service packet based on the second reference frequency to implement the differential clock frequency. Interoperability.
  • the sink device 20 may include: a packet message decapsulator 21, a differential clock frequency restorer 22, and a transmitter 23.
  • the packet message decapsulator 21 is configured to extract CBR service data and second differential frequency information in the CBR service packet.
  • the packet message decapsulator 21 can receive the CBR service packet and extract the CBR service data and the second differential frequency information according to the packet encapsulation format of the packet service.
  • the second differential frequency information is differential frequency information that is modified by the interlink modifier 30 and matches the second reference frequency of the sink device 20.
  • the differential frequency restorer 22 is configured to recover the CBR service data in the CBR service packet according to the extracted second differential frequency information.
  • the differential frequency restorer 22 can recover the CBR service data stream according to the CBR service packet carrying the differential frequency information.
  • the transmitter 23 is configured to send the recovered CBR service data stream to the destination end, such as a base station.
  • the interworking modifier 30 can be located at the source device 10 (not shown in FIG. 1), or at the sink device 20 (not shown in FIG. 1), and can also be located on the path of the packet network (as shown in the figure). 1)).
  • FIG. 2 is a flow chart of a method of adjusting a differential clock frequency, in accordance with an embodiment of the present invention.
  • Step S210 Receive a fixed rate CBR service packet, where the CBR service packet includes first differential frequency information corresponding to the first reference frequency supported by the source device.
  • the source device generates the first differential frequency information of the CBR service data according to the first reference frequency supported by the source device, and encapsulates the CBR service data and the first differential frequency information into the CBR service group.
  • the access device can extract the CBR service data in the CBR service data stream by parsing the CBR service data stream, that is, extract the service payload in the CBR service data stream, and the service payload can be called CBR.
  • the CBR service data stream uses Synchronous Digital Hierarchy (SDH) technology, and the access device can parse the CBR service data stream according to the corresponding standard of the SDH technology, and remove the useless data in the CBR service data stream.
  • SDH Synchronous Digital Hierarchy
  • the access device can parse the CBR service data stream according to the corresponding standard of the SDH technology, and remove the useless data in the CBR service data stream.
  • Segment overhead For example: Segment overhead; Obtain the service payload in the CBR service data stream, such as: channel overhead and data actually used for transmission in the payload area.
  • the differential frequency information generator generates first differential frequency information of the CBR service data according to the first reference frequency supported by the source device. Specifically, the differential frequency information generator performs continuous accumulation counting based on the first reference frequency to obtain a count value.
  • the count value corresponding to the extraction of the CBR service data may be used as the first differential frequency information of the CBR service data. For example, according to the clock cycle of the reference frequency used by the source device, every other clock cycle is accumulated.
  • the CBR service data is extracted in the CBR service data stream, the current count value is taken as the extracted CBR service data.
  • the count value is used as differential frequency information of the extracted CBR service data.
  • the packet message encapsulator can encapsulate the CBR service data and its first differential frequency information into CBR service packet messages. Specifically, the packet packet encapsulator can encapsulate the first differential frequency information of the CBR service data and the CBR service data into a CBR service packet according to the packet encapsulation format of the packet service. Preferably, the first differential frequency information of the CBR service data and the CBR service data may be respectively placed in corresponding fields of the packet packet encapsulation format to implement encapsulation of the CBR service data and the first differential frequency information thereof.
  • a CBR service packet only needs to carry a frequency time stamp information (differential frequency information), which can be used to encapsulate the CBR service.
  • the frequency time stamp information of the bit of the predetermined location of the CBR service data is fixed as the differential frequency information of the CBR service packet.
  • the CBR service packet can be transmitted in the packet network.
  • the packet message encapsulator may pre-set a tag for each reference frequency.
  • the label of the first reference frequency, the CBR service data, and the first differential frequency information of the CBR service data generated according to the first reference frequency may be encapsulated in the CBR service packet.
  • the label of the first reference frequency is encapsulated in the CBR service packet, and the interworking modifier can determine that the reference frequency is the first reference frequency by identifying the label of the reference frequency. For example, the label of the first reference frequency is 01. If the interworking modifier recognizes that the label is 01, it can be determined that the reference frequency is the first reference frequency.
  • the packet packet encapsulator can send the encapsulated CBR service packet to the interworking modifier, and the packet message receiver in the interworking modifier receives the CBR service packet, and the differential frequency modifier encapsulates the CBR service packet.
  • the first differential frequency information is modified to the second differential frequency information that the sink device can utilize.
  • Step S220 The first differential frequency information in the CBR service packet is converted into the second differential frequency information, where the second differential frequency information corresponds to the second reference frequency supported by the sink device.
  • the differential frequency modifier in the interworking modifier extracts the first differential frequency information of the CBR service data in the CBR service packet according to the packet encapsulation format of the packet service.
  • the first differential frequency information can be found and extracted in a field for placing differential frequency information.
  • the first differential frequency information can be a count value.
  • a conversion algorithm between differential frequency information at different reference frequencies can be preset in the differential frequency modifier.
  • the conversion algorithm between the differential frequency information at different reference frequencies refers to: converting the first differential frequency information generated according to the first reference frequency into a second differential frequency information that can be generated based on the second reference frequency by using a preset algorithm .
  • the first reference frequency is 2.43MHz and the second reference frequency is 19.44MHz
  • the conversion relationship between the first differential frequency information obtained according to 2.43 MHz and the second differential frequency information obtained according to 19.44 MHz may be: shifting the binary value of the first differential frequency information to the left by three bits and zeroing the original position.
  • the first differential frequency information can be switched to the second differential frequency information.
  • the first differential frequency information is 0001, and the 0001 is shifted to the left by three bits and then zero-padded to obtain that the second differential frequency information is 1000.
  • the differential frequency modifier modifies the differential frequency information in the CBR service packet from the original first differential frequency information to the second differential frequency information, and after modifying the differential frequency information, in one embodiment, the differential frequency is modified.
  • the device may determine, according to the label in the CB service packet, a first reference frequency for generating the first differential frequency information in the CBR service packet. Obtaining a second reference frequency supported by the sink device according to the sink device to which the CB service packet is to be received; wherein the second reference frequency is used to recover the CBR service data corresponding to the second differential frequency information.
  • the first differential frequency information corresponding to the first reference frequency is converted into the second differential frequency information corresponding to the second reference frequency.
  • a conversion algorithm between differential frequency information at one or more different reference frequencies is pre-set in the differential frequency modifier.
  • an algorithm for converting the first reference frequency corresponding to the first differential frequency information into the second differential frequency information corresponding to the second reference frequency to convert the first differential frequency information into the second differential frequency information is to say, in the differential frequency modifier, the reference frequency information of the source device is converted into the reference frequency information of the sink device, and the differential frequency information of the differential frequency generated by the source device is used for camping.
  • the end device can correctly parse the differential frequency information of the CBR service data and accurately recover the CBR service data.
  • Step S230 The CBR service packet including the second differential frequency information is sent to the sink device, and processed by the sink device.
  • the interworking modifier sends the CBR service packet to the sink device after modifying the differential frequency information, and the sink device recovers the number of CBR services in the CBR service packet based on the second reference frequency.
  • differential clock frequency intercommunication is realized.
  • the packet message decapsulator can extract the second differential frequency information of the CBR service data and the CBR service data according to the packet encapsulation format of the packet service. Specifically, according to the packet encapsulation format of the packet service, the second differential frequency information of the CB service data and the CBR service data are respectively in corresponding fields in the CBR service packet, and the packet packet decapsulator can be in the corresponding field. The second differential frequency information of the CBR service data and the CBR service data is extracted. Preferably, the second differential frequency information of the CBR service data is obtained by modifying the interworking modifier, and converting the original first differential frequency information into a second device capable of correctly recovering the CBR service data. Differential frequency information.
  • the differential frequency restorer can recover the CBR service data according to the extracted second differential frequency information.
  • the differential frequency restorer can recover the CBR service data stream according to the extracted differential frequency information.
  • the sender can send the recovered CBR service data stream, for example, to the base station.
  • the embodiment of the present invention can provide a differential frequency information interworking modifier to enable two devices supporting different differential frequency points to correctly perform service frequency recovery, and solve the interworking problem caused by different differential frequency points supported by different devices.
  • Embodiments of the present invention also provide an apparatus for adjusting a differential clock frequency.
  • FIG. 3 is a structural diagram of an apparatus for adjusting a differential clock frequency according to an embodiment of the present invention.
  • the apparatus is applied to an interworking modifier in an embodiment of the present invention.
  • a receiving module 310, a conversion module 320, and a transmitting module 330 may be included in the apparatus.
  • the receiving module 310 is configured to receive the fixed rate CBR service packet, where the CBR service packet includes the first differential frequency information corresponding to the first reference frequency supported by the source device, and the CBR service packet message is further received. Includes CBR service data extracted in the CBR service data stream.
  • the conversion module 320 is configured to convert the first differential frequency information in the CBR service packet message into the second differential frequency information, where the second differential frequency information corresponds to the first supported by the sink device Two reference frequencies.
  • the source device for generating the CBR service packet is further configured to: preset a label for each first reference frequency; and encapsulate the label of the first reference frequency, the CBR service data, and the first differential frequency information in the CBR In the service group message.
  • the conversion module 320 is further configured to: determine, according to the label in the CB service packet, a first reference frequency corresponding to the first differential frequency information in the CBR service packet, and acquire a second reference frequency supported by the sink device The second reference frequency is used to recover the CBR service data corresponding to the second differential frequency information; and the first differential frequency information corresponding to the first reference frequency is converted into the second differential frequency information corresponding to the second reference frequency.
  • the sending module 330 is configured to send the CBR service packet including the second differential frequency information to the sink device, and the sink device performs processing to implement differential clock frequency interworking.
  • the receiving module 310 and the sending module 330 may be implemented by a communication chip in a device for adjusting a differential clock frequency
  • the converting module 320 may be a central processing unit (Central Processing Unit) in a device for adjusting a differential clock frequency.
  • CPU Central Processing Unit
  • MPU Micro Processor Unit
  • DSP Digital Signal Processor
  • the functions of the device in this embodiment are basically corresponding to the method embodiments shown in FIG. 1 to FIG. 2, and therefore, in the description of the embodiment, reference may be made to the related description in the foregoing embodiment. Do not repeat them.
  • the embodiment of the invention further provides a computer readable storage medium, the storage medium comprising a set of instructions for performing a method for adjusting a differential clock frequency according to an embodiment of the invention.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the present invention is applicable to one or more computer-usable storage media (including but not limited to disks) having computer usable program code embodied therein. A form of computer program product embodied on a memory and optical storage, etc.).
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • the embodiment of the present invention can improve the accuracy of data recovery by providing a differential frequency information interworking modifier to modify the differential frequency information of the CBR service data to enable the two devices supporting different reference frequencies to communicate correctly.
  • a differential frequency information interworking modifier to modify the differential frequency information of the CBR service data to enable the two devices supporting different reference frequencies to communicate correctly.

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Abstract

本发明公开了一种调整差分时钟频率的方法、装置、系统、源端设备和互通修改器。该方法包括:接收固定码率(CBR)业务分组报文;CBR业务分组报文中包括与源端设备支持的第一参考频率对应的第一差分频率信息;将CBR业务分组报文中的第一差分频率信息转换为第二差分频率信息,第二差分频率信息对应宿端设备支持的第二参考频率,将包含第二差分频率信息的CBR业务分组报文发送给宿端设备,由宿端设备进行处理。

Description

调整差分时钟频率方法、 装置、 系统、 源端设备和互通修改器 技术领域
本发明涉及通信技术领域, 特别是涉及一种调整差分时钟频率的方法、 装置、 系统、 源端设备和互通修改器。 背景技术
固定码率(Constants Bit Rate, CBR )业务在传统的基于时分复用系统 的网络中, 已经得到了大量的应用, 并且其延时、 抖动和漂移等特性都能 得到有效的保证。 但是传统的基于时分复用系统的网络对于分组报文的传 送效率比较低, 而网络之间互连的协议( Internet Protocol, IP )化越来越明 显, 必然面临如何在分组网络中传送 CBR业务数据的问题。
CB 业务数据的频率和发送端的参考频率不同而产生差分频率, 导致 CBR业务数据需要在接收端恢复 CBR业务数据的时钟(频率), 才能够得 到正确的 CBR业务数据。 现有的三种时钟恢复方式包括: 再定时模式、 差 分时钟模式和自适应时钟模式。
目前, 差分时钟恢复标准算法的基本原理是: 根据源端设备釆用的参 考频率生成 CBR业务数据的差分频率信息, 并将 CBR业务数据及其差分 频率信息传送至宿端设备, 由宿端设备根据接收到的差分频率信息恢复出 CB 业务数据。 进一步地, 在进行时钟恢复时, 只有源端设备和宿端设备 釆用的参考频率一致, 也即是源端设备和宿端设备的差分时钟频率互通, 才能正确恢复 CBR业务数据。
但是, 在实际的网络中, 不同厂家的设备釆用的参考频率不一致, 导 致源端设备向宿端设备传送的差分频率信息无法被用来正常解析 CBR业务 数据, 导致 CBR业务数据无法被正常恢复。 发明内容
为解决现有存在的技术问题, 本发明实施例提供一种调整差分时钟频 率的方法、 装置、 系统、 源端设备和互通修改器。
本发明实施例提供了一种调整差分时钟频率的的方法。 所述方法包括: 接收固定码率 CBR业务分组^艮文; 其中, 所述 CBR业务分组^艮文中包括 与所述源端设备支持的第一参考频率对应的第一差分频率信息; 将所述 CBR业务分组报文中的第一差分频率信息转换为第二差分频率信息,其中, 所述第二差分频率信息对应宿端设备支持的第二参考频率; 将包含第二差 分频率信息的 CBR业务分组报文发送给所述宿端设备, 由所述宿端设备进 行处理, 实现差分时钟频率互通。
本发明实施例提供了一种调整差分时钟频率的装置, 包括: 接收模块, 配置为接收固定码率 CBR业务分组报文; 其中, 所述 CBR业务分组报文 中包括与所述源端设备支持的第一参考频率对应的第一差分频率信息; 转 换模块, 配置为将所述 CBR业务分组报文中的第一差分频率信息转换为第 二差分频率信息, 其中, 所述第二差分频率信息对应宿端设备支持的第二 参考频率; 发送模块, 配置为将包含第二差分频率信息的 CBR业务分组才艮 文发送给所述宿端设备, 由所述宿端设备进行处理, 实现差分时钟频率互 通。
本发明实施例还提供了一种互通修改器, 包括: 分组报文接收器、 差 分频率修改器、分组报文发送器,其中: 分组报文接收器, 配置为接收 CBR 业务分组报文; 其中, 所述 CBR业务分组报文中包括与所述源端设备支持 的第一参考频率对应的第一差分频率信息; 差分频率修改器, 配置为将所 述 CBR业务分组报文中的第一差分频率信息转换为第二差分频率信息, 其 中, 所述第二差分频率信息对应宿端设备支持的第二参考频率; 分组报文 发送器, 配置为将包含第二差分频率信息的 CBR业务分组报文发送给所述 宿端设备, 由所述宿端设备进行处理, 实现差分时钟频率互通。 本发明实施例还提供了一种源端设备, 包括: 接入器, 配置为从 CBR 业务数据流中提取 CBR业务数据; 差分频率信息产生器, 配置为根据第一 参考频率,生成所述 CBR业务数据的第一差分频率信息;分组报文封装器, 配置为将所述 CBR业务数据及其第一差分频率信息封装为 CBR业务分组 报文。
本发明实施例还提供了一种调整差分时钟频率的系统, 包括: 源端设 备、 调整差分时钟频率的装置、 宿端设备; 其中: 源端设备, 配置为生成 固定码率 CBR业务分组^艮文; 其中, 在所述 CBR业务分组^艮文中包括与 所述源端设备支持的第一参考频率对应的第一差分频率信息; 调整差分时 钟频率的装置, 配置为将所述 CBR业务分组报文中的第一差分频率信息转 换为第二差分频率信息, 其中, 所述第二差分频率信息对应宿端设备支持 的第二参考频率; 宿端设备, 配置为基于第二参考频率恢复 CBR业务分组 报文中的 CBR业务数据, 实现差分时钟频率互通。
本发明实施例还提供了一种计算机可读存储介质, 所述存储介质包括 一组指令, 所述指令用于执行本发明实施例所述的调整差分时钟频率的方 法。
本发明实施例有益效果如下:
本发明实施例通过修改 CBR业务数据的差分频率信息, 使两个支持不 同参考频率的设备之间能够正确进行 CB 业务数据的恢复, 实现了支持不 同参考频率的设备之间的差分时钟频率的互通, 提高了数据恢复的准确性。 附图说明
图 1 是根据本发明一实施例的调整差分时钟频率的系统的结构图; 图 2是根据本发明一实施例的调整差分时钟频率的方法的流程图; 图 3是根据本发明一实施例的调整差分时钟频率的装置的结构图。 具体实施方式
以下结合附图以及实施例, 对本发明进行进一步详细说明。 应当理解, 此处所描述的具体实施例仅仅用以解释本发明, 并不限定本发明。
如图 1所示, 图 1 是根据本发明一实施例的调整差分时钟频率的系统 的结构图。
该系统可以包括源端设备 10和宿端设备 20。 CB 业务数据通过源端 设备 10接入分组网络, 并由宿端设备 20通过分组网络接收该 CBR业务数 据。 其中, CBR业务数据是指固定码率数据, 该固定码率数据每秒传送的 比特数固定。
源端设备 10配置为,生成固定码率 CBR业务分组报文;其中,在 CBR 业务分组报文中包括与源端设备 10支持的第一参考频率对应的第一差分频 率信息。较佳地, 该 CBR业务数据的第一差分频率信息是根据源端设备 10 所支持的第一参考频率生成的差分频率信息。
较佳地, 源端设备 10可以包括: 接入器 11、 差分频率信息产生器 12、 分组报文封装器 13。
接入器 11配置为, 在所述 CBR业务数据流中, 提取 CB 业务数据。 较佳地, 接入器 11可以接收并解析 CBR业务数据流, 并提取出 CBR业务 数据流中的业务净荷, 以及将业务净荷传送给分组报文封装器 13。 业务净 荷是指 CBR业务数据流中有效的或实质性的部分,该部分数据(业务净荷) 可以被称作 CBR业务数据。 CBR业务数据流可以来自基站设备。
差分频率信息产生器 12 配置为, 根据第一参考频率, 生成所述 CBR 业务数据的第一差分频率信息。 较佳地, 差分频率信息产生器 12可以根据 源端设备 10所釆用的第一参考频率, 针对分组报文封装器 13中的 CBR业 务数据生成该 CBR业务数据的第一差分频率信息。 参考频率是指设备(源 端设备、 宿端设备) 所支持的频率, 该频率可以用于计数, 可以通过得到 的计数值(频率时间戳)来体现差分频率信息。
分组报文封装器 13配置为, 将所述 CBR业务数据及其第一差分频率 信息封装为 CBR业务分组报文。 较佳地, 分组报文封装器 13可以根据分 组业务的报文封装格式, 将 CBR业务数据和 CBR业务数据的第一差分频 率信息封装成 CBR业务分组报文。
源端设备和宿端设备均可以支持一个或多个参考频率。 但是, 当源端 设备和宿端设备不存在相同的参考频率时, 则针对源端设备发送的 CBR业 务数据, 宿端设备无法正确进行恢复。 例如, 源端设备支持的参考频率是 2.43MHz, 宿端设备支持的参考频率是 19.44MHz, 则宿端设备无法正确以 与源端设备参考频率相同的频率识别 CBR业务分组报文的差分频率信息, 这样会造成宿端设备无法利用源端设备生成的差分频率信息正确恢复出 CBR业务数据。
本发明实施例通过为系统提供调整差分时钟频率的设备(也可称为互 通修改器 30 ),支持不同参考频率的源端设备 10和宿端设备 20之间的差分 时钟频率的互通。 换言之, 源端设备 10和宿端设备 20即使支持的参考频 率不同, 也可以通过互通修改器 30使宿端设备 20正确解析出 CBR业务数 据。
基于上述的互通修改器 30, 源端设备 10可以将 CBR业务分组报文发 送至互通修改器 30。 互通修改器 30配置为, 根据源端设备 10和宿端设备 20所支持的参考频率,对接收到的 CBR业务分组报文中的差分频率信息进 行修改,并将修改差分频率信息后的 CBR业务分组报文发送至宿端设备 20。 其中, 修改后的差分频率信息对应宿端设备 20的参考频率, 也即是宿端设 备 20的参考频率可以使用修改后的差分频率信息正确恢复 CBR业务数据。
互通修改器 30包括分组报文接收器 31、 差分频率修改器 32、 分组报 文发送器 33。源端设备 10中的分组报文封装器 13将 CBR业务分组报文发 送至互通修改器 30中的分组报文接收器 31, 分组报文接收器 31可以接收 来自分组报文封装器 13的 CBR业务分组报文, 差分频率修改器 32可以根 据预先设置的不同参考频率下的差分频率信息之间的转换算法, 将 CBR业 务分组报文中的第一差分频率信息转换为第二差分频率信息, 其中, 第二 差分频率信息对应宿端设备 20 支持的第二参考频率。 分组报文发送器 33 将修改过差分频率信息的 CBR业务分组报文发送给宿端设备 20。
宿端设备 20配置为, 接收来自互通修改器 30 (分组报文发送器 33 ) 的 CBR业务分组报文, 并基于第二参考频率恢复 CBR业务分组报文中的 CBR业务数据, 实现差分时钟频率互通。
较佳地, 宿端设备 20可以包括: 分组报文解封装器 21、 差分时钟频率 恢复器 22、 发送器 23。
分组报文解封装器 21配置为, 在 CBR业务分组报文中提取出 CBR业 务数据和第二差分频率信息。较佳地, 分组报文解封装器 21可以接收 CBR 业务分组报文, 并根据分组业务的报文封装格式提取出 CBR业务数据和第 二差分频率信息。 该第二差分频率信息是经过互通修改器 30的修改且与宿 端设备 20的第二参考频率相匹配的差分频率信息。
差分频率恢复器 22配置为,根据提取出的第二差分频率信息恢复 CBR 业务分组报文中的 CBR业务数据。 较佳地, 差分频率恢复器 22可以根据 携带差分频率信息的 CBR业务分组报文恢复出 CBR业务数据流。
发送器可 23配置为, 将恢复出的 CBR业务数据流发送到目的端, 如 基站。
较佳地, 互通修改器 30可以位于源端设备 10 (图 1中未示出), 也可 以位于宿端设备 20 (图 1中未示出), 还可以位于分组网络的路径上(如图 1所示)。
图 1 所述系统的各个部分的具体功能可以参考对本发明一种调整差分 时钟频率的方法实施例的具体描述。 如图 2所示, 图 2是根据本发明一实 施例的调整差分时钟频率的方法的流程图。 步骤 S210, 接收固定码率 CBR业务分组报文; 其中, 在 CBR业务分 组报文中包括与源端设备支持的第一参考频率对应的第一差分频率信息。
源端设备根据其支持的第一参考频率, 生成 CBR业务数据的第一差分 频率信息, 并将 CBR业务数据及其第一差分频率信息封装为 CBR业务分 组才艮文。
具体而言, 接入器通过解析 CBR业务数据流, 可以在 CBR业务数据 流中提取 CBR业务数据, 也即是提取出 CBR业务数据流中的业务净荷, 该业务净荷可以被称作 CBR业务数据。 例如: 该 CBR业务数据流釆用同 步数字系列 ( Synchronous Digital Hierarchy, SDH )技术, 则接入器可以根 据 SDH技术的相应标准, 解析 CBR业务数据流, 去除 CBR业务数据流中 的无用的数据, 如: 段开销; 获取 CBR业务数据流中的业务净荷, 如: 通 道开销和净负荷区中真正用于传输的数据。
差分频率信息产生器根据源端设备所支持的第一参考频率, 生成 CBR 业务数据的第一差分频率信息。 具体而言, 差分频率信息产生器根据第一 参考频率进行连续累加计数, 获得计数值。 可以将提取 CBR业务数据时所 对应的计数值作为 CBR业务数据的第一差分频率信息。 例如: 根据源端设 备釆用的参考频率的时钟周期, 每隔一个时钟周期, 进行累加, 当在 CBR 业务数据流中提取出 CBR业务数据时,则将当前计数值作为提取出的 CBR 业务数据, 将该计数值作为提取出的 CBR业务数据的差分频率信息。
分组报文封装器可以将 CBR 业务数据及其第一差分频率信息封装为 CBR业务分组报文。 具体而言, 分组报文封装器可以根据分组业务的报文 封装格式, 将 CBR业务数据和 CBR业务数据的第一差分频率信息封装成 CBR业务分组报文。 较佳地, 可以将 CBR业务数据和 CBR业务数据的第 一差分频率信息分别放置在分组报文封装格式的相应字段中, 以实现对 CBR业务数据及其第一差分频率信息的封装。通常, 一个 CBR业务分组才艮 文只需携带一个频率时戳信息 (差分频率信息), 可以在拟封装 CBR业务 分组报文中, 固定使用 CBR业务数据的预定位置的比特的频率时戳信息, 作为该 CBR业务分组"¾文的差分频率信息。 该 CBR业务分组 ^艮文可以在 分组网络中进行传输。
在一个实施例中, 若源端设备支持一个或多个参考频率, 则分组报文 封装器可以为每个参考频率预先设置一个标签。在封装 CBR也分组报文时, 可以将第一参考频率的标签、 CBR业务数据以及根据所述第一参考频率生 成的 CBR业务数据的第一差分频率信息封装在 CBR业务分组^¾文中。 将 第一参考频率的标签封装在 CBR业务分组报文中, 可以使互通修改器通过 识别参考频率的标签来确定出该参考频率是第一参考频率。 例如, 第一参 考频率的标签为 01, 若互通修改器识别出标签为 01, 则可以确定参考频率 是第一参考频率。
分组报文封装器可以将封装好的 CBR 业务分组报文发送至互通修改 器, 互通修改器中的分组报文接收器接收该 CBR业务分组报文, 差分频率 修改器将 CBR业务分组报文中的第一差分频率信息修改为宿端设备可以利 用的第二差分频率信息。
步骤 S220,将 CBR业务分组报文中的第一差分频率信息转换为第二差 分频率信息, 其中, 第二差分频率信息对应宿端设备支持的第二参考频率。
具体而言, 互通修改器中的差分频率修改器根据分组业务的报文封装 格式, 在 CBR业务分组报文中提取 CBR业务数据的第一差分频率信息。 较佳地, 可以在用于放置差分频率信息的字段中找到并提取该第一差分频 率信息。 该第一差分频率信息可以是一个计数值。
在差分频率修改器中可以预先设置不同参考频率下的差分频率信息之 间的转换算法。 不同参考频率下的差分频率信息之间的转换算法是指: 将 根据第一参考频率生成的第一差分频率信息, 通过预设的算法转化为基于 第二参考频率能够生成的第二差分频率信息。
例如: 第一参考频率是 2.43MHz, 第二参考频率是 19.44MHz, 那么根 据 2.43MHz得到的第一差分频率信息和根据 19.44MHz得到的第二差分频 率信息之间的转换关系可以是: 将第一差分频率信息的二进制数值左移三 位并在原来的位置补零, 即可将第一差分频率信息换转为第二差分频率信 息。 如: 第一差分频率信息是 0001, 将该 0001左移三位后补零可以得到第 二差分频率信息是 1000。
差分频率修改器将 CBR业务分组报文中的差分频率信息从原有的第 一差分频率信息修改为第二差分频率信息, 并将该修改差分频率信息后的 在一个实施例中, 差分频率修改器可以根据 CB 业务分组报文中的标 签, 确定生成 CBR业务分组报文中的第一差分频率信息的第一参考频率。 根据 CB 业务分组报文所要到达的宿端设备, 获取宿端设备所支持的第二 参考频率; 其中该第二参考频率用于恢复对应第二差分频率信息的 CBR业 务数据。 将第一参考频率对应的第一差分频率信息转化为第二参考频率对 应的第二差分频率信息。 较佳地, 在差分频率修改器中预先设置一个或多 个不同参考频率下的差分频率信息之间的转换算法。 在一个或多个转换算 法中, 查询将第一参考频率对应第一差分频率信息转化为第二参考频率对 应的第二差分频率信息的算法, 以将第一差分频率信息转化为第二差分频 率信息。 也即是说, 本发明实施例是在差分频率修改器中, 将源端设备的 参考频率信息转化为宿端设备的参考频率信息, 使源端设备产生的差分频 的差分频率信息, 以便宿端设备可以正确解析出 CBR业务数据的差分频率 信息, 准确的恢复出 CBR业务数据。
步骤 S230,将包含第二差分频率信息的 CBR业务分组报文发送给宿端 设备, 由宿端设备进行处理。
互通修改器将修改差分频率信息后 CBR 业务分组报文发送给宿端设 备, 宿端设备基于第二参考频率恢复 CBR业务分组报文中的 CBR业务数 据, 实现差分时钟频率互通。
分组报文解封装器可以根据分组业务的报文封装格式, 提取出 CBR业 务数据和 CBR业务数据的第二差分频率信息。 具体而言, 根据分组业务的 报文封装格式, CB 业务数据和 CBR业务数据的第二差分频率信息分别处 于 CBR业务分组报文中相应的字段中, 分组报文解封装器可以在相应的字 段中提取出 CBR业务数据和 CBR业务数据的第二差分频率信息。 较佳地, 该 CBR业务数据的第二差分频率信息是经过互通修改器的修改而得到的, 从原有的第一差分频率信息转化为宿端设备能够用于正确恢复 CBR业务数 据的第二差分频率信息。
差分频率恢复器可以根据提取出的第二差分频率信息, 恢复 CBR业务 数据。较佳地,差分频率恢复器可以根据提取出的差分频率信息恢复出 CBR 业务数据流。
发送器可以将恢复出的 CBR业务数据流发送出去, 例如发送到基站。 本发明实施例能通过提供差分频率信息互通修改器, 使两个支持不同 差分频点的设备正确进行业务频率恢复, 解决不同设备支持的差分频点不 同造成的互通问题。
本发明实施例还提供了一种调整差分时钟频率的装置。 如图 3 所示, 图 3是根据本发明一实施例的调整差分时钟频率的装置的结构图。
该装置应用于本发明实施例中的互通修改器。
在该装置中可以包括接收模块 310、 转换模块 320、 发送模块 330。 接收模块 310,配置为接收固定码率 CBR业务分组报文;其中,在 CBR 业务分组报文中包括与源端设备支持的第一参考频率对应的第一差分频率 信息; CBR业务分组报文还包括在 CBR业务数据流中提取的 CBR业务数 据。
转换模块 320, 配置为将 CBR业务分组报文中的第一差分频率信息转 换为第二差分频率信息, 其中, 第二差分频率信息对应宿端设备支持的第 二参考频率。
用于生成 CBR业务分组报文的源端设备, 还用于: 为每个第一参考频 率预先设置一个标签; 将第一参考频率的标签、 CBR业务数据及其第一差 分频率信息封装在 CBR业务分组报文中。
转换模块 320,还配置为:根据 CB 业务分组报文中的标签,确定 CBR 业务分组报文中的第一差分频率信息对应的第一参考频率; 获取宿端设备 所支持的一个第二参考频率; 其中第二参考频率用于恢复对应第二差分频 率信息的 CBR业务数据; 将第一参考频率对应的第一差分频率信息转化为 第二参考频率对应的第二差分频率信息。
发送模块 330, 配置为将包含第二差分频率信息的 CBR业务分组报文 发送给所述宿端设备, 由所述宿端设备进行处理, 实现差分时钟频率互通。
在具体实施过程中, 上述接收模块 310和发送模块 330可以由调整差 分时钟频率的装置中的通信芯片来实现, 转换模块 320 可以由调整差分时 钟频率的装置中的中央处理器 (Central Processing Unit, CPU ), 微处理器 ( Micro Processor Unit, MPU )或数字信号处理器( Digital Signal Processor, DSP ) 来实现。
由于本实施例的装置所实现的功能基本相应于前述图 1至图 2所示的 方法实施例, 故本实施例的描述中未详尽之处, 可以参见前述实施例中的 相关说明, 在此不做赘述。
本发明实施例还提供了一种计算机可读存储介质, 所述存储介质包括 一组指令, 所述指令用于执行本发明实施例所述的调整差分时钟频率的方 法。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计算机程序产品。 因此, 本发明可釆用硬件实施例、 软件实施例、 或结 合软件和硬件方面的实施例的形式。 而且, 本发明可釆用在一个或多个其 中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘 存储器和光学存储器等 )上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序 产品的流程图和 /或方框图来描述的。 应理解可由计算机程序指令实现流程 图和 /或方框图中的每一流程和 /或方框、以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器, 使得 在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功 能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理 设备以特定方式工作的计算机可读存储器中, 使得存储在该计算机可读存 储器中的指令产生包括指令装置的制造品, 该指令装置实现在流程图一个 流程或多个流程和 /或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备 上, 使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机 实现的处理, 从而在计算机或其他可编程设备上执行的指令提供用于实现 在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功 能的步骤。
本发明实施例能通过提供差分频率信息互通修改器, 修改 CBR业务数 据的差分频率信息, 使两个支持不同参考频率的设备之间能够正确进行 的互通, 提高了数据恢复的准确性。 但实际上并不限于上述实施方式, 在 不脱离本发明的精神和范围内, 任何熟悉本技术领域的技术人员在本发明 揭露的技术范围内, 可轻易想到的变化或替换, 都应该落在本发明的保护 范围之内。
尽管为示例目的, 已经公开了本发明的优选实施例, 本领域的技术人 员将意识到各种改进、 增加和取代也是可能的, 因此, 本发明的范围应当 不限于上述实施例。

Claims

权利要求书
1、 一种调整差分时钟频率的方法, 包括:
接收固定码率 CBR业务分组^艮文; 其中, 所述 CBR业务分组^艮文中 包括与所述源端设备支持的第一参考频率对应的第一差分频率信息;
将所述 CBR业务分组报文中的第一差分频率信息转换为第二差分频率 信息, 其中, 所述第二差分频率信息对应宿端设备支持的第二参考频率; 将包含第二差分频率信息的 CBR业务分组报文发送给所述宿端设备, 由所述宿端设备进行处理, 实现差分时钟频率互通。
2、 如权利要求 1所述的方法, 其中, 所述 CBR业务分组报文中包括 为每个第一参考频率预先设置的标签和从 CBR业务数据流中提取的 CBR 业务数据。
3、 如权利要求 2所述的方法, 其中, 将所述 CBR业务分组报文中的 第一差分频率信息转换为第二差分频率信息, 还包括:
根据所述标签, 确定所述 CBR业务分组"¾文中的第一差分频率信息对 应的第一参考频率;
获取所述宿端设备所支持的第二参考频率; 其中所述第二参考频率用 于恢复对应第二差分频率信息的 CBR业务数据;
将所述第一参考频率对应的第一差分频率信息转化为所述第二参考频 率对应的第二差分频率信息。
4、 一种调整差分时钟频率的装置, 包括:
接收模块, 配置为接收固定码率 CBR业务分组报文; 其中, 所述 CBR 业务分组报文中包括与所述源端设备支持的第一参考频率对应的第一差分 频率信息;
转换模块, 配置为将所述 CBR业务分组报文中的第一差分频率信息转 换为第二差分频率信息, 其中, 所述第二差分频率信息对应宿端设备支持 的第二参考频率;
发送模块, 配置为将包含第二差分频率信息的 CBR业务分组报文发送 给所述宿端设备, 由所述宿端设备进行处理, 实现差分时钟频率互通。
5、 如权利要求 4所述的装置, 其中, 所述 CBR业务分组报文中包括 为每个第一参考频率预先设置的标签和从 CBR业务数据流中提取的 CBR 业务数据。
6、 如权利要求 5所述的装置, 其中, 所述转换模块, 还配置为: 根据所述标签, 确定所述 CBR业务分组"¾文中的第一差分频率信息对 应的第一参考频率;
获取所述宿端设备所支持的一个第二参考频率; 其中所述第二参考频 率用于恢复对应第二差分频率信息的 CBR业务数据;
将所述第一参考频率对应的第一差分频率信息转化为所述第二参考频 率对应的第二差分频率信息。
7、 一种互通修改器, 包括: 分组报文接收器、 差分频率修改器、 分组 报文发送器, 其中:
分组报文接收器, 配置为接收 CBR业务分组报文; 其中, 所述 CBR 业务分组报文中包括与所述源端设备支持的第一参考频率对应的第一差分 频率信息;
差分频率修改器, 配置为将所述 CBR业务分组报文中的第一差分频率 信息转换为第二差分频率信息, 其中, 所述第二差分频率信息对应宿端设 备支持的第二参考频率;
分组报文发送器, 配置为将包含第二差分频率信息的 CBR业务分组报 文发送给所述宿端设备, 由所述宿端设备进行处理, 实现差分时钟频率互 通。
8、 如权利要求 7所述的互通修改器, 其中, 所述 CBR业务分组报文 中包括为每个第一参考频率预先设置的标签和从 CBR业务数据流中提取的 CBR业务数据。
9、 如权利要求 8所述的互通修改器, 其中, 所述差分频率修改器, 还 配置为:
根据所述标签, 确定所述 CBR业务分组"¾文中的第一差分频率信息对 应的第一参考频率;
获取所述宿端设备所支持的一个第二参考频率; 其中所述第二参考频 率用于恢复对应第二差分频率信息的 CBR业务数据;
将所述第一参考频率对应的第一差分频率信息转化为所述第二参考频 率对应的第二差分频率信息。
10、 一种源端设备, 包括:
接入器, 配置为从 CBR业务数据流中提取 CBR业务数据;
差分频率信息产生器, 配置为根据第一参考频率, 生成所述 CBR业务 数据的第一差分频率信息;
分组报文封装器, 配置为将所述 CBR业务数据及其第一差分频率信息 封装为 CBR业务分组报文。
11、 如权利要求 10所述的源端设备, 其中, 所述差分频率产生器配置 为:
根据第一参考频率进行连续累加计数, 以获得一个或多个计数值; 将提取所述 CBR业务数据时所对应的计数值作为所述 CBR业务数据 的第一差分频率信息。
12、如权利要求 10或 11所述的源端设备,其中,所述分组报文封装器, ¾J己 :
为每个第一参考频率预先设置一个标签;
将所述第一参考频率的标签、 CBR业务数据及其第一差分频率信息封 装在 CBR业务分组报文中。
13、 一种调整差分时钟频率的系统, 包括: 源端设备、 调整差分时钟 频率的装置、 宿端设备; 其中:
源端设备,配置为生成固定码率 CBR业务分组报文;其中,在所述 CBR 业务分组报文中包括与所述源端设备支持的第一参考频率对应的第一差分 频率信息;
调整差分时钟频率的装置, 配置为将所述 CBR业务分组报文中的第一 差分频率信息转换为第二差分频率信息, 其中, 所述第二差分频率信息对 应宿端设备支持的第二参考频率;
宿端设备,配置为基于第二参考频率恢复 CBR业务分组报文中的 CBR 业务数据, 实现差分时钟频率互通。
14、 一种计算机可读存储介质, 所述存储介质包括一组指令, 所述指 令用于执行权利要求 1-3任一项所述的调整差分时钟频率的方法。
PCT/CN2014/076410 2014-01-16 2014-04-28 调整差分时钟频率方法、装置、系统、源端设备和互通修改器 WO2015106504A1 (zh)

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