WO2023124445A1 - 控制展频的方法和装置 - Google Patents

控制展频的方法和装置 Download PDF

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Publication number
WO2023124445A1
WO2023124445A1 PCT/CN2022/126718 CN2022126718W WO2023124445A1 WO 2023124445 A1 WO2023124445 A1 WO 2023124445A1 CN 2022126718 W CN2022126718 W CN 2022126718W WO 2023124445 A1 WO2023124445 A1 WO 2023124445A1
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WIPO (PCT)
Prior art keywords
spread spectrum
capability information
tsb
spreading
spectrum
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PCT/CN2022/126718
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English (en)
French (fr)
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聂耳
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华为技术有限公司
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Publication of WO2023124445A1 publication Critical patent/WO2023124445A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4004—Coupling between buses
    • G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1004—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's to protect a block of data words, e.g. CRC or checksum
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0026—PCI express

Definitions

  • the present application relates to the communication field, and more particularly, to a method and device for controlling spread spectrum.
  • PCIe peripheral component interface express
  • PCB printed circuit board
  • the spread spectrum (spread spectrum, SSC) technology is a technology that the PCIe physical layer reduces the electromagnetic interference of the serializer/deserializer (serializer and deserializer, SerDes) differential signal to other devices.
  • SSC serializer/deserializer
  • SerDes serializer and deserializer
  • the reference The clock is modulated with a low-frequency clock, and the noise spectrum of the high-speed voltage differential signaling (LVDS) will not be so concentrated, thereby improving electromagnetic compatibility.
  • the present application provides a method and device for controlling spread spectrum, capable of knowing spread spectrum capability information of devices in a high-speed serial link, so as to indicate whether to enable spread spectrum.
  • a method for controlling spread spectrum is provided, which is applicable to wired high-speed serial links, and the method can be executed by a network device or a chip or a chip system on the network device side.
  • the method includes: the first device receives the first training code stream block TSB sent by the second device, and the first TSB includes the second spreading capability information of the second device; The second device sends a second TSB, where the second TSB includes first indication information, and the first indication information is used to instruct the second device to enable or disable the frequency conversion.
  • the second device can send the second spread spectrum capability information of the second device to the first device, and the first device receives the second spread spectrum capability information sent by the second device, that is, the first device and the second device Spread spectrum capability information can be exchanged between them; the first device can determine whether to open the spectrum spread of the second device and the spectrum spread of the first device according to the second spread spectrum capability information and the first spread spectrum capability information of the first device; The device may send first indication information to the second device, where the first indication information is used to instruct the second device to turn on or not to turn on the frequency conversion.
  • the method before the first device sends the second TSB to the second device, the method further includes: the first device according to the first spread spectrum The capability information and the second spectrum spreading capability information determine whether to enable the spectrum spreading of the second device, wherein the first spectrum spreading capability information is the spectrum spreading capability information of the first device.
  • the first spread spectrum capability information includes indication information of whether the first device supports spread spectrum or a first spread spectrum frequency offset supported by the first device at least one of; the second spread spectrum capability information includes at least one of indication information of whether the second device supports spread spectrum or a second spread spectrum frequency offset supported by the second device.
  • the spread spectrum frequency offset can be understood as that the reference clock frequency provided to the SerDes after the spread frequency is turned on will change periodically within a certain range, and the maximum value of the frequency deviation from the reference is the spread spectrum frequency offset. It should be understood that the spread spectrum frequency offset can also be called is the spread frequency amplitude.
  • the first device determines whether to enable the spectrum spreading of the second device according to the first spectrum spreading capability information and the second spectrum spreading capability information, It includes: if the first spread spectrum capability information indicates that the first device supports spread spectrum, and the second spread spectrum capability information indicates that the second device supports spread spectrum, then the first device determines to open the Spread spectrum of the second device; if the first spread spectrum capability information indicates that the first device does not support spread spectrum, or, the second spread spectrum capability information indicates that the second device does not support spread spectrum, or, The first spread spectrum capability information indicates that the first device does not support spread spectrum and the second spread spectrum capability information indicates that the second device does not support spread spectrum, then the first device determines not to enable the second spread spectrum Spread spectrum of the second device.
  • the first device determines to enable the frequency spread of the second device and also enables its own frequency spread; If any device in the second device does not support frequency spread or neither the first device nor the second device supports frequency spread, then the first device determines not to enable frequency spread of the second device, or Do not turn on your own spread spectrum.
  • the first device calculates the The second spreading frequency offset is to determine the first target spreading frequency offset; the first indication information carries the first target spreading frequency offset, and the first indication information is used to instruct the second device to Target spread frequency deviation Turn on spread frequency.
  • the first device determines a first target spreading frequency offset according to the first spreading frequency offset and the second spreading frequency offset, including: if the The first spreading frequency deviation is greater than or equal to the second spreading frequency deviation, then the first target spreading frequency deviation is equal to the first spreading frequency deviation; if the first spreading frequency deviation is less than the second spreading frequency deviation frequency deviation, the first target spreading frequency deviation is equal to the second spreading frequency deviation. It should be understood that determining a larger spreading frequency offset as the target spreading frequency offset can avoid insufficient compensation of the frequency offset and prevent overflow of transmitted data.
  • the first device receiving the first training code stream block TSB sent by the second device includes: the first device receiving the first TSB from the third device The first TSB sent by the second device, wherein the first TSB further includes the third spread spectrum capability information of the third device; the first device sends the second TSB to the second device, including : the first device sends the second TSB to the second device through the third device, and the second TSB further includes second indication information, and the second indication information is used to indicate the first Three devices to turn on or not to turn on HF.
  • the third device may be a retimer.
  • the first device receives the first TSB sent by the second device from the third device.
  • the first TSB includes The second spread spectrum capability information of the second device and the third spread spectrum capability information of the third device; the first device according to the first spread spectrum capability information, the second spread spectrum capability information and the third spread spectrum capability information of the first device , to determine whether to enable the spread spectrum of the third device and the spread spectrum of the second device; the first device sends the second TSB to the second device through the third device, and the second TSB includes the first Instruction information and second instruction information for instructing the third device to open the frequency band.
  • the scheme can realize the mutual spread spectrum capability information of the devices in the high-speed serial link, and instruct other devices to turn on or not to turn on the spread spectrum by sending instruction information.
  • the method before the first device sends the second TSB to the second device through the third device, the method further includes: the The first device determines whether to enable the spectrum spreading of the third device and whether to enable the spectrum spreading of the second device according to the first spectrum spreading capability information, the second spectrum spreading capability information, and the third spectrum spreading capability information spread spectrum.
  • the method further includes: the first device sends the third TSB to the second device through the third device, and reaches the first
  • the third TSB of the second device includes the first spread spectrum capability information and the third spread spectrum capability information of the first device, and the third spread spectrum capability information includes whether the third device supports spread spectrum At least one item of the indication information of or the third spread spectrum frequency offset supported by the third device.
  • the first device determines whether to open the The spectrum spreading of the third device and whether to enable the spectrum spreading of the second device include: if the first spectrum spreading capability information indicates that the first device supports spectrum spreading, the second spectrum spreading capability information indicating that the second device supports spectrum spreading and the third spectrum spreading capability information indicates that the third device supports spectrum spreading, then the first device determines to enable the spectrum Spectrum spreading of the device; if the first spectrum spreading capability information indicates that the first device does not support spectrum spreading, and/or, the second spectrum spreading capability information indicates that the second device does not support spectrum spreading, and/or, The third spread spectrum capability information indicates that the third device does not support spread spectrum, and the first device determines not to enable the spread spectrum of the third device and not to enable the spread spectrum of the second device.
  • the first device determines whether to open the The spectrum spreading of the third device and whether to enable the spectrum spreading of the second device include: if the first spectrum spreading capability information indicates that the first device supports spectrum spreading, the second spectrum spreading capability information indicating that the second device does not support spectrum spreading, and the third spectrum spreading capability information indicates that the third device supports spectrum spreading, then the first device determines to enable the spectrum spreading of the third device and not to enable the The frequency spreading of the second device; if the first frequency spreading capability information indicates that the first device does not support frequency spreading, the second frequency spreading capability information indicates that the second device supports frequency spreading, and the second frequency spreading capability information indicates that the second device supports frequency spreading.
  • the third spread spectrum capability information indicates that the third device supports spread spectrum, and the first device determines to enable the spread spectrum of the third device and enable the spread spectrum of the second device.
  • the first device interacts directly with the third device, and the third device directly interacts with the second device; if the first device and the third device support spread spectrum, and the second device does not support spread spectrum, the spread spectrum of the first device can be turned on.
  • the spread frequency of the third device and the spread frequency of the third device if the spread frequency of the second device is not turned on, the data transmission will not be affected; if the third device and the second device support the spread frequency, and the first device does not support the spread
  • the spread spectrum of the first device and the spread spectrum of the second device will not affect the data transmission if the spread spectrum of the first device is not turned on.
  • the first device determines to turn on the spread spectrum of the third device and to turn on the spread spectrum of the second device, then the first device according to The first spreading frequency offset, the second spreading frequency offset, and the third spreading frequency offset determine a second target spreading frequency offset; the first indication information and the second indication information carry the first Two-target spread frequency deviation.
  • the first instruction information is used to instruct the second device to enable the frequency spread according to the second target spread frequency offset, and the second instruction information is used to instruct the third device to turn on the frequency spread frequency offset according to the second target spread frequency offset. Turn on spread spectrum.
  • the second target spreading frequency offset is one of the first spreading frequency offset, the second spreading frequency offset, and the third spreading frequency offset the biggest one.
  • the TSB includes a type indication field, a load field, and a cyclic redundancy check CRC check field, where the type indication field is used to indicate the The TSB is to discover the training code stream block or configure the training code stream block, the load field is used to carry the spread spectrum capability information or the indication information indicating whether to enable or not to enable the spread spectrum, and the CRC check field is used to check the TSB check.
  • the first bit in the load field is used to carry the first spreading capability information, so The second bit in the load field is used to carry the second spread spectrum capability information, and the third bit in the load field is used to carry the third spread spectrum capability information;
  • the first bit in the load field is used to bear the first indication information, and the second bit in the load field is used to bear the second indication information.
  • the opening of the spread spectrum includes the clock chip or the spread spectrum generator using a low frequency clock to modulate the reference clock; the disabling of the spread spectrum includes the clock chip or the spread spectrum The generator does not modulate the reference clock.
  • a method for controlling spread spectrum is provided, which is applicable to wired high-speed serial links, and the method can be executed by a network device or a chip or a chip system on the network device side.
  • the method includes: the second device sends a first training code stream block TSB to the first device, the first TSB includes second spread spectrum capability information of the second device, and the second spread spectrum capability information is used for The first device determines whether to enable the spread spectrum of the second device; the second device receives a second TSB sent by the first device, the second TSB includes first indication information, and the first The instruction information is used to instruct the second device to turn on or not to turn on the frequency conversion.
  • the second device sends the first TSB to the first device through the third device, and the first TSB arriving at the first device includes the second spread spectrum capability information of the second device and the third spread spectrum of the third device Capability information: the first device can determine whether to enable the second device's spread spectrum and whether to enable the third device's spread spectrum according to the second spread spectrum capability information, the third spread spectrum capability information and the first spread spectrum capability information of the first device and whether to enable the spread spectrum of the first device; the first device sends a second TSB to the second device through the third device, the second TSB includes first indication information and second indication information, and the first indication information is used to indicate The second device turns on or does not turn on the frequency band, and the second indication information is used to instruct the third device to turn on or not to turn on the frequency band. Therefore, the method can learn the spread spectrum capability information of the device in the wired high-speed serial link through interaction, and determine whether to enable spread spectrum according to the instruction.
  • the method further includes: the second device receives a third TSB sent by the first device, and the third TSB includes the first device The first spread spectrum capability information.
  • the first spread spectrum capability information includes indication information of whether the first device supports spread spectrum or a first spread spectrum frequency offset supported by the first device at least one of; the second spread spectrum capability information includes at least one of indication information of whether the second device supports spread spectrum or a second spread spectrum frequency offset supported by the second device.
  • the second device sending the first training code stream block TSB to the first device includes: the second device sending the first training code stream block TSB to the first device through a third device
  • the device sends the first TSB, and the first TSB arriving at the first device includes the second spread spectrum capability information and the third spread spectrum capability information of the third device, and the third spread spectrum capability information
  • the capability information includes at least one of indication information of whether the third device supports spread spectrum or a third spread frequency offset supported by the third device;
  • the second device receives the second TSB sent by the first device , including: the second device receives from the third device the second TSB sent by the first device, the second TSB further includes second indication information, and the second indication information is used to indicate
  • the third device turns on or does not turn on the frequency conversion.
  • the method further includes: the second device receives the third TSB sent by the first device from the third device, the first The three TSBs include the first spread spectrum capability information and the third spread spectrum capability information of the first device.
  • the TSB includes a type indication field, a payload field, and a cyclic redundancy check CRC check field, where the type indication field is used to indicate the The TSB is to discover the training code stream block or configure the training code stream block, the load field is used to carry the spread spectrum capability information or the indication information indicating whether to enable or not to enable the spread spectrum, and the CRC check field is used to check the TSB check.
  • the first bit in the load field is used to carry the first spreading capability information, so The second bit in the load field is used to carry the second spread spectrum capability information, and the third bit in the load field is used to carry the third spread spectrum capability information;
  • the first bit in the load field is used to bear the first indication information, and the second bit in the load field is used to bear the second indication information.
  • the opening of the spread spectrum includes the clock chip or the spread spectrum generator using a low-frequency clock to modulate the reference clock; the disabling of the spread spectrum includes the clock chip or the spread spectrum The generator does not modulate the reference clock.
  • a method for controlling spread spectrum is provided, which is applicable to wired high-speed serial links, and the method can be executed by a network device or a chip or a chip system on the network device side.
  • the method includes: the third device receives the first training code block TSB sent by the second device, and the first TSB includes the second spreading capability information of the second device; the third device updates the first A TSB, the updated first TSB includes the third spread spectrum capability information and the second spread spectrum capability information of the third device, the second spread spectrum capability information and the third spread spectrum capability information
  • the capability information is used by the first device to determine whether to enable the spread spectrum of the third device and whether to enable the spread spectrum of the second device; the third device sends the updated The first TSB; the third device receives the second TSB sent by the first device, the second TSB includes first indication information and second indication information, and the first indication information is used to indicate the first indication information
  • the second device turns on or does not turn on the frequency spreader, and the third indication information is used
  • the third device may send the second spread spectrum capability information of the second device and the third spread spectrum capability information of the third device to the first device;
  • the third spread spectrum capability information and the first spread spectrum capability information of the first device can determine whether to enable the spread spectrum of the second device, whether to enable the spread spectrum of the third device, and whether to enable the spread spectrum of the first device;
  • the third device receives and Forwarding the first device to send a second TSB, the second TSB includes first indication information and second indication information, the first indication information is used to instruct the second device to enable or disable the frequency converter, and the second indication information is used to Instructs the third device to turn on or off the frequency band. Therefore, the method can learn the spread spectrum capability information of the device in the wired high-speed serial link through interaction, and determine whether to enable spread spectrum according to the instruction.
  • the method further includes: the third device receiving a third TSB sent by the first device, the third TSB including the first The first spread spectrum capability information of the device; the third device updates the third TSB, and the updated third TSB includes the third spread spectrum capability information of the third device and the first spread spectrum Capability information: the third device sends the updated third TSB to the second device.
  • the first spread spectrum capability information includes indication information of whether the first device supports spread spectrum or a first spread spectrum frequency offset supported by the first device at least one of;
  • the second spread spectrum capability information includes at least one of the indication information of whether the second device supports spread spectrum or the second spread spectrum frequency offset supported by the second device;
  • the third The spread spectrum capability information includes at least one of indication information of whether the third device supports spread spectrum or a third spread spectrum frequency offset supported by the third device.
  • a communication device which may be the first device described in the first aspect, and the device includes: a receiving module, configured to receive the first training code stream block TSB sent by the second device, the The first TSB includes the second spread spectrum capability information of the second device; the sending module is configured to send the second TSB to the second device, the second TSB includes first indication information, and the first The instruction information is used to instruct the second device to turn on or not to turn on the frequency conversion.
  • the device further includes a control module configured to determine whether to enable the second spectrum spreading capability information according to the first spectrum spreading capability information and the second spectrum spreading capability information The spectrum spreading capability of the device, wherein the first spectrum spreading capability information is the spectrum spreading capability information of the device.
  • the sending module is further configured to send a third TSB to the second device, where the third TSB includes the first spreading capability information, so that The first spread spectrum capability information is spread spectrum capability information of the device.
  • the first spread spectrum capability information includes at least one of indication information of whether the device supports spread spectrum or a first spread spectrum frequency offset supported by the device. item; the second spread spectrum capability information includes at least one of indication information of whether the second device supports spread spectrum or a second spread spectrum frequency offset supported by the second device.
  • control module is specifically configured to: if the first spectrum spreading capability information indicates that the device supports spectrum spreading, and the second spectrum spreading capability information Indicating that the second device supports frequency spread, it is determined to enable the frequency spread of the second device; otherwise, it is determined not to enable the frequency spread of the second device.
  • the receiving module is specifically configured to receive, from a third device, the first TSB sent by the second device, where the first TSB It also includes third spread spectrum capability information of the third device; the sending module is specifically configured to send the second TSB to the second device through the third device, and the second TSB further includes Second instruction information, the second instruction information is used to instruct the third device to turn on or not to turn on the frequency conversion.
  • control module is further configured to, according to the first spectrum spreading capability information, the second spectrum spreading capability information, and the third spectrum spreading capability information to determine whether to enable the spread spectrum of the third device and whether to enable the spread spectrum of the second device.
  • the sending module is further configured to send the third TSB to the second device through the third device, and reach the
  • the third TSB includes the first spread spectrum capability information and the third spread spectrum capability information of the device, and the third spread spectrum capability information includes indication information whether the third device supports spread spectrum Or at least one of the third spread frequency offsets supported by the third device.
  • control module is specifically configured to: if the first spread spectrum capability information indicates that the device supports spread spectrum, the second spread spectrum capability information indicates The second device supports spread spectrum and the third spread spectrum capability information indicates that the third device supports spread spectrum, then determine to enable the spread spectrum of the third device, and enable the spread spectrum of the second device; if The first spread spectrum capability information indicates that the device does not support spread spectrum, and/or, the second spread spectrum capability information indicates that the second device does not support spread spectrum, and/or, the third spread spectrum capability information Indicating that the third device does not support spread spectrum, it is determined not to enable the spread spectrum of the third device and not to enable the spread spectrum of the second device.
  • control module is specifically configured to: if the first spread spectrum capability information indicates that the device supports spread spectrum, the second spread spectrum capability information indicates The second device does not support spread spectrum, and the third spread spectrum capability information indicates that the third device supports spread spectrum, then it is determined to enable the spread spectrum of the third device and not to enable the spread spectrum of the second device ; If the first spread spectrum capability information indicates that the device does not support spread spectrum, the second spread spectrum capability information indicates that the second device supports spread spectrum, and the third spread spectrum capability information indicates that the If the third device supports frequency spread, it is determined to enable the frequency spread of the third device and to enable the frequency spread of the second device.
  • the TSB includes a type indication field, a payload field, and a cyclic redundancy check CRC check field, where the type indication field is used to indicate the The TSB is to discover the training code stream block or configure the training code stream block, the load field is used to carry the spread spectrum capability information or the indication information indicating whether to enable or not to enable the spread spectrum, and the CRC check field is used to check the TSB check.
  • the first bit in the load field is used to carry the first spreading capability information, so The second bit in the load field is used to carry the second spread spectrum capability information, and the third bit in the load field is used to carry the third spread spectrum capability information; when the TSB is configured training code stream block, the first bit in the load field is used to bear the first indication information, and the second bit in the load field is used to bear the second indication information.
  • a communication device which may be the second device described in the second aspect, and the device includes: a sending module, configured to send a first training code stream block TSB to the first device, and the first A TSB includes the second spectrum spreading capability information of the device, and the second spectrum spreading capability information is used by the first device to determine whether to enable the spectrum spreading of the device; the receiving module receives the information sent by the first device
  • the second TSB of the second TSB includes first indication information, and the first indication information is used to instruct the device to enable or disable the frequency conversion.
  • the receiving module is further configured to receive a third TSB sent by the first device, where the third TSB includes the first TSB of the first device.
  • the spreading spectrum capability information is further configured to receive a third TSB sent by the first device, where the third TSB includes the first TSB of the first device.
  • the first spread spectrum capability information includes indication information of whether the first device supports spread spectrum or a first spread spectrum frequency offset supported by the first device at least one of;
  • the second spread spectrum capability information includes at least one of indication information of whether the device supports spread spectrum or a second spread spectrum frequency offset supported by the device.
  • the sending module is specifically configured to send the first TSB to the first device through a third device, and reach the first TSB of the first device.
  • the first TSB includes the second spread spectrum capability information and the third spread spectrum capability information of the third device, and the third spread spectrum capability information includes indication information of whether the third device supports spread spectrum or the at least one of the third spread frequency offsets supported by the third device;
  • the receiving module is specifically configured to receive the second TSB sent by the first device from the third device, and the second TSB
  • the second instruction information is also included in the second instruction information, and the second instruction information is used to instruct the third device to turn on or not to turn on the frequency conversion.
  • the receiving module is further configured to receive, from the third device, the third TSB sent by the first device, where the third TSB It includes the first spread spectrum capability information and the third spread spectrum capability information of the first device.
  • a communication device including: a processor and a memory, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the communication device performs any of the above A method in any possible implementation of an aspect or any aspect.
  • a communication device including: an input-output interface and a logic circuit, the input-output interface is used to receive or output information; the logic circuit is used to perform any possible operation in any of the above-mentioned aspects or in any aspect. Implement the method described in the manner.
  • An eighth aspect provides a communication system, including: the first device of the method of the first aspect, the second device of the method of the second aspect, and the third device of the method of the third aspect.
  • a computer-readable storage medium stores a computer program; when the computer program or the processor runs on a computer, the computer or the processor performs any of the above-mentioned tasks.
  • a computer program product including instructions is provided, and when the instructions are executed by a computer, the communication device implements the method in any one of the above aspects or any possible implementation manners of any aspect.
  • FIG. 1 is a schematic diagram of a scenario where a high-speed serial interface uses a reference clock.
  • Figure 2 is an example of the application of high-speed serial interface controllers in SOC chip systems.
  • FIG. 3 is a schematic diagram of the data structure of the TSB proposed by the embodiment of the present application.
  • FIG. 4 is a schematic diagram of a negotiation process in an embodiment of the present application.
  • Fig. 5 is a schematic flowchart interaction diagram of a method for controlling spread spectrum proposed by an embodiment of the present application.
  • Fig. 6 is a schematic flowchart interaction diagram of another method for controlling spread spectrum proposed by an embodiment of the present application.
  • FIG. 7 is an example of a method for controlling spread spectrum proposed by an embodiment of the present application.
  • Fig. 8 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • Fig. 9 is a schematic block diagram of another communication device according to an embodiment of the present application.
  • Fig. 10 is a schematic block diagram of another communication device according to an embodiment of the present application.
  • Fig. 11 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • the embodiments of the present application can be applied to various communication systems, such as a wireless local area network system (wireless local area network, WLAN), a narrowband Internet of Things system (narrow band-internet of things, NB-IoT), a global system for mobile communications (global system for mobile communications, GSM), enhanced data rate for GSM evolution system (enhanced data rate for gsm evolution, EDGE), wideband code division multiple access system (wideband code division multiple access, WCDMA), code division multiple access 2000 system (code division multiple access, CDMA2000), time division-synchronization code division multiple access system (time division-synchronization code division multiple access, TD-SCDMA), long term evolution system (long term evolution, LTE), satellite communication, fifth generation (5th generation, 5G) systems or new communication systems that will appear in the future.
  • WLAN wireless local area network
  • NB-IoT narrowband Internet of Things system
  • GSM global system for mobile communications
  • GSM global system for mobile communications
  • enhanced data rate for GSM evolution system enhanced data rate for
  • a communication system applicable to this application includes one or more sending ends and one or more receiving ends.
  • the signal transmission between the sending end and the receiving end may be transmitted through radio waves, or may be transmitted through transmission media such as visible light, laser, infrared, and optical fiber.
  • one of the sending end and the receiving end may be a terminal device, and the other may be a network device.
  • both the sending end and the receiving end may be terminal devices.
  • the terminal devices involved in the embodiments of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems.
  • the terminal can be a mobile station (mobile station, MS), a subscriber unit (subscriber unit), a user equipment (user equipment, UE), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a personal digital assistant ( personal digital assistant (PDA) computer, tablet computer, wireless modem (modem), handheld device (handset), laptop computer (laptop computer), machine type communication (machine type communication, MTC) terminal, etc.
  • the user equipment includes vehicle user equipment.
  • the network device may be an evolved Node B (evolved Node B, eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC) ), base transceiver station (base transceiver station, BTS), home base station (home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit, BBU), wireless fidelity (wireless fidelity, WIFI) system in the connection Access point (access point, AP), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or transmission and reception point (transmission and reception point, TRP), etc., can also be a new air interface (new radio, A gNB or transmission point (for example, TRP or TP) in NR), one or a group (including multiple) antenna panels of a base station in NR, or a network node constituting a gNB or a transmission point, such as
  • the BBU and radio frequency unit can be integrated in the same device, and the device is connected to the antenna array through a cable (such as but not limited to a feeder).
  • the BBU can also be set separately from the RFU, and the two are connected through an optical fiber, and communicate through, for example but not limited to, a common public radio interface (CPRI) protocol.
  • CPRI common public radio interface
  • the RFU is usually called a remote radio unit (RRU), which is connected to the antenna array by cables.
  • the RRU can also be integrated with the antenna array, for example, active antenna unit (active antenna unit, AAU) products currently on the market adopt this structure.
  • the BBU can be further decomposed into multiple parts.
  • the BBU can be further subdivided into a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU) according to the real-time nature of the service being processed.
  • CU is responsible for processing non-real-time protocols and services
  • DU is responsible for processing physical layer protocols and real-time services.
  • some physical layer functions can be separated from the BBU or DU and integrated in the AAU.
  • Spread spectrum technology is a commonly used wireless communication technology, referred to as spread spectrum technology.
  • the peak value of the pulse will generate electromagnetic interference, and the spread spectrum technology can reduce the electromagnetic interference generated by the pulse generator.
  • the spread spectrum is collectively referred to as spread spectrum.
  • peripheral bus interface is widely used as a key high-speed interconnection interface.
  • the high-speed serial link on the PCB will generate certain electromagnetic interference to other circuits due to its high frequency and concentrated spectrum.
  • Spread spectrum is a technique that PCIe physical layer reduces the electromagnetic interference of serializer/deserializer differential signal to other devices. After SSC is turned on, the spread spectrum hardware module will use low-frequency clock to modulate the reference clock, and high-speed voltage differential The noise spectrum of the signal will not be so concentrated, thereby improving electromagnetic compatibility.
  • FIG. 1 a schematic diagram of a scene where a high-speed serial interface uses a reference clock is shown.
  • the outside of the chip needs to provide PCIe with a reference clock that meets the requirements of the specification.
  • PCIe working in host mode will output the reference clock used by itself.
  • the retimer and device can choose to use the reference clock output by the host, or choose Use the reference clock provided on the local board.
  • the sending end/sending device can turn on and off the spread frequency by controlling the clock chip on the single board, or control the built-in SSC generator in the PCIe SerDes to turn on the spread frequency and turn off the spread frequency.
  • turning on the spread frequency can be understood as the clock chip or SSC generator uses a low-frequency clock to modulate the reference clock, and the modulated reference clock is the reference clock transmitted after turning on the spread frequency, which can reduce the electromagnetic interference generated by the reference clock; turn off the spread spectrum
  • the clock chip or the SSC generator does not modulate the reference clock, that is, does not perform any processing.
  • TX needs to know whether RX supports spread spectrum to enable spread spectrum, but the PCIe protocol does not define the relevant code stream and software and hardware processes to communicate the spread spectrum capability information of both parties, which leads to the fact that the current product use can only rely on the software to know the relevant information in advance Replacement of firmware adaptation, dynamic negotiation is not possible; and when there is a retimer in the high-speed serial link, it is impossible to know whether the retimer supports spread spectrum indication information and the supported spread spectrum frequency deviation, which limits the application of spread spectrum in products.
  • the PCIe protocol allows the frequency offset of the spread spectrum to change within a certain range. If the TX always inserts the code stream (skip, SKP) to eliminate the frequency offset according to the maximum frequency offset, it will affect the performance of the link. For example, according to the maximum frequency offset Inserting SKP will lose 2% performance.
  • a system management bus (system management bus, SM Bus) can be added to PCIe to collect the ability of each port in the link to support SSC, and judge the on/off of SSC through the capability information.
  • SM Bus system management bus
  • the SSC cannot be turned on and off independently at both ends of the link. In other words, all devices or devices in the link must turn on/off the SSC together; Port information increases complexity and cost; in addition, the insertion frequency of SKP in this solution cannot be adjusted.
  • the embodiment of the present application proposes a method for controlling spread spectrum, which can obtain the spread spectrum capability information of devices in the wired high-speed serial link by sending training code stream blocks, and send indication information to indicate that the wired high-speed serial link Devices in the uplink may or may not turn on HF.
  • FIG. 2 an example of the application of a high-speed serial interface controller (input output controller, IO controller) in a system on chip (system on chip, SOC) is shown.
  • the SOC uses a wired high-speed serial interface to connect an Ethernet card (network card), and the SOC uses the Ethernet card to communicate with the external network.
  • Two-level retimers are connected in series between the SOC and the Ethernet card, including retimer 0 (retimer0) and retimer 1 (retimer1), and the retimer is used to relay data transmitted between the SOC and the Ethernet card.
  • the high-speed serial interface controller is integrated in the SOC and connected to the system bus of the SOC.
  • the physical layer (PHY) is part of the high-speed serial interface controller.
  • the high-speed serial interface controller is connected to an external Ethernet card device (device) through SerDes to form a chip system with high-speed IO interface and retimer.
  • TSB training set block
  • DTSB discovery training set block
  • CTSB configuration training set block
  • ETSB equalization training set block
  • RTSB retraining training set block
  • UTSB unified training stream block
  • the training code stream block is sent by the sending end or the receiving end during the process of establishing a high-speed serial link, and the training code stream block carries some information required for establishing a high-speed serial link.
  • FIG. 3 it shows a schematic diagram of the data structure of the TSB proposed by the embodiment of the present application.
  • TSB includes:
  • TSB type (type) indication field which indicates the state of the negotiation process. For example, "0xA0” indicates a discovery (discovery) state, indicating that the TSB is a DTSB; “0xB0” indicates a configuration (configuration) state, indicating that the TSB is a CTSB; "other” indicates a reserved field.
  • (2) TSB payload field carries negotiation-related information, and its length can be any value. For example, it carries at least one of indication information of whether the device in the wired high-speed serial link supports spread spectrum or a supported spread spectrum frequency offset, and indication information for indicating whether to enable or disable spread spectrum, and the like.
  • TSB cyclic redundancy check code (cyclic redundancy check, CRC): used to check and confirm the correctness of the entire TSB, to ensure that the negotiation information is transmitted correctly in the event of a bit error.
  • the negotiation process of whether to open the frequency spectrum includes a discovery (discovery) phase, a configuration (configuration) phase, and a successful link establishment (link active)/service interaction phase.
  • FIG. 4 it shows a schematic diagram of a negotiation process in the embodiment of the present application.
  • the sending end and the receiving end use DTSB to carry out the indication information of whether to support the spread spectrum, and the supported spread spectrum frequency offset to interact.
  • the sender can send a DTSB, which includes at least one of the indication information of whether the sender supports spread spectrum or the supported spread frequency offset.
  • the retimer forwards the DTSB, it will indicate whether it supports spread spectrum
  • At least one item of information or supported spread spectrum frequency offset is used to modify the relevant fields in the DTSB to inform the receiving end of its own support for spread spectrum and at least one item of supported spread spectrum frequency offset.
  • the receiving end can also send a DTSB, which includes at least one of the indication information of whether the receiving end supports spread spectrum or the supported frequency offset of the spread spectrum.
  • At least one of the supported spread spectrum frequency offsets is used to modify the relevant fields in the DTSB to inform the sender of its support for spread spectrum and supported spread spectrum frequency offsets.
  • Configuration stage Use CTSB to confirm the handshake of opening or not opening the frequency band.
  • the sender analyzes the DTSB sent by the receiver to obtain the indication information of whether the retimer supports spread spectrum and the spread frequency offset, and determines whether to enable the spread spectrum of retimers at all levels.
  • the sender will send CTSB to the receiver, and the sent CTSB The confirmation result is shown in .
  • the transmitting end will calculate the insertion frequency of the SKP according to the final spread frequency offset.
  • Successful link establishment/business interaction stage After receiving the CTSB, the receiving end enters the stage of sending and receiving business data. That is, after completing the negotiation of opening or not opening frequency, enter the normal service interaction stage, and insert SKP periodically according to the calculated insertion frequency.
  • the first device may be an IO controller in the SOC
  • the second device may be an Ethernet card
  • the third device may be a retimer.
  • the first device may be called a sending end
  • the second device may be called a receiving end
  • the third device may be called a relay device, which is not specifically limited.
  • FIG. 5 a schematic flow interaction diagram of a method 500 for controlling spread spectrum proposed by an embodiment of the present application is shown.
  • the method is applicable to the wired high-speed serial link, and can know the spread spectrum capability information of the device in the wired high-speed serial link, so as to determine and indicate whether to open the spread spectrum.
  • a wired high-speed serial link includes a first device and a second device as an example.
  • the method includes:
  • the second device sends a first training code stream block TSB to the first device, the first TSB includes second spread spectrum capability information of the second device, and the second spread spectrum capability information is used by the first device to determine Whether to enable the spread spectrum of the second device.
  • the clock chip or the spread spectrum generator uses a low-frequency clock to modulate the reference clock; if the spread frequency is not turned on, the clock chip or the spread spectrum generator does not modulate the reference clock.
  • the second spread spectrum capability information includes at least one of indication information of whether the second device supports spread spectrum or a second spread spectrum frequency offset supported by the second device.
  • the second spectrum spreading capability information may only include information indicating whether the second device supports spectrum spreading, for example, the second spectrum spreading capability information may only include information indicating that the second device does not support spectrum spreading.
  • the second spread spectrum capability information may only include the second spread spectrum frequency offset supported by the second device; it should be understood that when the second spread spectrum capability information only includes the second spread spectrum frequency offset supported by the second device, it may be specified in the agreement frequency offset threshold, determine whether the second spread spectrum frequency offset is greater than or equal to the frequency offset threshold; if the second spread frequency offset is greater than or equal to the frequency offset threshold, then determine that the second device supports spread spectrum; if the second spread spectrum If the frequency deviation is smaller than the frequency deviation threshold, it is determined that the second device does not support spread spectrum.
  • the second spread spectrum capability information may include indication information of whether the second device supports spread spectrum and the second spread spectrum frequency offset supported by the second device. It should be understood that when the second device does not support spread spectrum, the second spread spectrum capability information The second spread frequency offset supported by the second device is not included.
  • the first device receives the first TSB sent by the second device.
  • the first device sends a second TSB to the second device, where the second TSB includes first indication information, where the first indication information is used to instruct the second device to enable or disable the frequency band.
  • the first device determines whether to enable the spectrum spreading of the second device according to the first spectrum spreading capability information of the first device and the second spectrum spreading capability information of the second device. If the first device determines to enable the spread spectrum of the second device, the first indication information is used to instruct the second device to enable the spread spectrum; if the first device determines not to enable the spread spectrum of the second device, the first indication information is used to indicate The second device does not turn on the frequency converter.
  • the first spread spectrum capability information includes at least one of indication information of whether the first device supports spread spectrum or a first spread spectrum frequency offset supported by the first device.
  • the first device determines to enable the spectrum spreading of the second device; One device determines not to turn on the spread spectrum of the second device. That is to say, only when the first device and the second device both support the spread spectrum, the first device determines to enable the spread spectrum of the second device. It should be understood that when both the first device and the second device support spread spectrum, the first device also turns on its own spread spectrum when it determines to enable the spread spectrum of the second device. Send the second TSB and then turn on its own spread spectrum. The first device can also first turn on its own spread spectrum and then send the second TSB to the second device.
  • the first device determines not to enable the frequency spread of the second device, nor to enable its own frequency spread.
  • the first device determines not to open the second device The spread frequency. That is to say, when any one of the first device and the second device does not support the spread spectrum, the first device determines not to enable the spread spectrum of the second device.
  • the first device determines the first target spread frequency according to the first spread frequency offset supported by the first device and the second spread frequency offset supported by the second device. Partial. For example, when the first spreading frequency deviation is greater than or equal to the second spreading frequency deviation, the first device may determine that the first target spreading frequency deviation is equal to the first spreading frequency deviation; when the first spreading frequency deviation is less than the second spreading frequency deviation , the first device may determine that the first target spreading frequency offset is equal to the second spreading frequency offset.
  • the first indication information in the second TSB sent by the first device to the second device may carry the first target spreading frequency offset, and the first indication information is used to instruct the second device to spread the frequency offset according to the first target spread frequency.
  • the frequency offset enables the spread frequency, and correspondingly, the second device may determine the frequency for inserting the SKP according to the first target spread frequency offset.
  • the first indication information in the second TSB sent by the first device to the second device does not carry the first target spread spectrum frequency offset, and the second TSB is used to indicate that the second TSB The second device does not open the frequency converter.
  • the second device receives the second TSB sent by the first device, and enables or disables its own spread spectrum according to the first indication information in the second TSB. If the first instruction information indicates to enable the spread spectrum of the second device, the second device will enable its own spread spectrum; if the first instruction information indicates not to enable the second device's spread spectrum, then the second device will not enable its own spread spectrum.
  • the first device may also send a third TSB to the second device, where the third TSB includes the first spreading capability information of the first device.
  • the first device first sends the third TSB to the second device, and after the second device receives the third TSB sent by the first device, the second device sends the first TSB to the first device, which is not specifically limited.
  • the first device when the first device also sends the first spread spectrum capability information to the second device, and the first spread spectrum capability information includes the first spread spectrum frequency offset supported by the first device, the first device sends the first spread spectrum capability information to the second device.
  • the first indication information in the second TSB sent by the second device may not carry the first target spreading frequency offset, because the second device may also base on the first spreading frequency offset supported by the first device and the second target spreading frequency offset supported by the second device.
  • the spreading frequency offset is to determine the first target spreading frequency offset; the first indication information in the second TSB sent by the first device to the second device may also carry the first target spreading frequency offset. If the first device does not send the first spreading capability information to the second device, the first indication information in the second TSB sent by the first device to the second device needs to carry the first target spreading frequency offset.
  • the second device may send the second device's second spread spectrum capability information to the first device, and the first device receives the second spread spectrum capability information sent by the second device, that is, the second spread spectrum capability information sent by the second device Spread spectrum capability information can be exchanged between a device and a second device; the first device can determine whether to enable the spread spectrum capability of the second device and the first device according to the second spread spectrum capability information and the first spread spectrum capability information of the first device. spread frequency; the first device may send first indication information to the second device, where the first indication information is used to instruct the second device to turn on or not to turn on the spread frequency.
  • FIG. 6 a schematic flow interaction diagram of a method 600 for controlling spread spectrum proposed by an embodiment of the present application is shown.
  • the method is applicable to the wired high-speed serial link, and can learn the spread spectrum capability information of the device in the wired high-speed serial link through interaction, and determine whether to open the spread spectrum according to the instruction.
  • a wired high-speed serial link includes a first device, a second device, and a third device.
  • the method includes:
  • the second device sends a first TSB to the first device through the third device, and the first TSB arriving at the first device includes the second spectrum spreading capability information of the second device and the third spectrum spreading capability information of the third device.
  • the second spread spectrum capability information includes at least one of the indication information of whether the second device supports spread spectrum or the second spread spectrum frequency offset supported by the second device;
  • the third spread spectrum capability information includes an indication of whether the third device supports spread spectrum At least one item of information or a third spread frequency offset supported by the third device.
  • the second device sends a first TSB to the third device, where the first TSB includes second spectrum spreading capability information of the second device.
  • the third device receives the first TSB sent by the second device, the third device updates the first TSB, and the updated first TSB includes the second spreading capability information of the second device and the first TSB of the third device.
  • Three spread spectrum capability information that is, the third device adds at least one of indication information of whether it supports spread spectrum or supported third spread spectrum frequency offset to the first TSB.
  • the third device sends the updated first TSB to the first device.
  • the clock chip or the spread spectrum generator uses a low-frequency clock to modulate the reference clock; if the spread frequency is not turned on, the clock chip or the spread spectrum generator does not modulate the reference clock.
  • the first device receives the first TSB sent by the second device from the third device, and the first TSB arriving at the first device is the updated first TSB of the third device, that is, the first TSB received by the first device
  • the TSB includes the second spectrum spreading capability information of the second device and the third spectrum spreading capability information of the third device.
  • the first device sends a second TSB to the second device through the third device, the second TSB includes first indication information and second indication information, and the first indication information is used to instruct the second device to turn on or not to turn on the spread frequency , the second instruction information is used to instruct the third device to enable or disable the frequency conversion.
  • the first device determines whether to enable the spectrum spreading capability of the third device according to the first spectrum spreading capability information of the first device, the second spectrum spreading capability information of the second device, and the third spectrum spreading capability information of the third device. , and whether to enable the spread spectrum of the second device. If the first device determines to open the frequency spread of the third device, the second indication information is used to indicate the opening frequency of the third device; if the first device determines not to open the frequency spread of the third device, the second indication information is used to Indicates that the third device does not turn on the frequency converter.
  • the first indication information is used to instruct the second device to enable the spread spectrum; if the first device determines not to enable the spread spectrum of the second device, the first indication information is used to indicate The second device does not turn on the frequency converter.
  • the first spread spectrum capability information includes at least one of indication information of whether the first device supports spread spectrum or a first spread spectrum frequency offset supported by the first device.
  • the first spread spectrum capability information indicates that the first device supports spread spectrum
  • the second spread spectrum capability information indicates that the second device supports spread spectrum
  • the third spread spectrum capability information indicates that the third device supports spread spectrum
  • the first The device determines to turn on the spread spectrum of the third device, and to turn on the spread spectrum of the second device. Otherwise, the first device determines not to enable the spread spectrum of the third device and not to enable the spread spectrum of the second device. It should be understood that when the first device determines to turn on the spread spectrum of the third device, the first device also determines to turn on its own spread spectrum; when the first device determines not to turn on the spread spectrum of the third device, the first device also determines not to turn on the spread spectrum of the third device own spread spectrum.
  • the first spectrum spreading capability information indicates that the first device does not support spectrum spreading
  • the third spectrum spreading capability information indicates that the third device does not support spectrum spreading
  • the second spectrum spreading capability information indicates If the second device does not support spread spectrum, the first device determines not to enable the spread spectrum of the second device. That is to say, when any one of the first device, the third device and the second device does not support frequency spread, the first device determines not to enable the frequency spread of the third device and not to enable the frequency spread of the second device.
  • the first device determines to enable the spread spectrum of the third device and enable the spread spectrum of the second device.
  • the first device determines to enable the frequency offset of the first spread spectrum supported by the first device and the third spread spectrum supported by the third device.
  • the frequency offset and the second spreading frequency offset supported by the second device are used to determine a second target spreading frequency offset.
  • the second target spreading frequency offset is equal to the largest one among the first spreading frequency offset, the second spreading frequency offset and the third spreading frequency offset.
  • both the first indication information and the second indication information in the second TSB may carry the second target spreading frequency offset.
  • the first instruction information is used to instruct the second device to enable the frequency spread according to the second target frequency spread frequency offset
  • the second instruction information is used to instruct the third device to enable the frequency spread according to the second target frequency spread frequency offset.
  • the first device determines not to enable the spread spectrum of the second device and not to enable the spread spectrum of the third device, neither the first indication information nor the second indication information in the second TSB carries the first target frequency spread frequency offset, the The second TSB is used to indicate that the second device does not turn on the frequency band, and the third device does not turn on the frequency band.
  • the second A device determines to open the spread spectrum of the third device and not to open the spread spectrum of the second device; Spread spectrum between devices. It should be understood that if the first device determines to enable the spread spectrum of the third device, the first device also determines to enable its own spread spectrum. In this case, the first indication information in the second TSB is used to instruct the second device not to turn on the spread frequency, and the second indication information in the second TSB is used to instruct the third device to turn on the spread frequency.
  • the second instruction information may also carry a third target frequency spread frequency offset, and the second instruction information is used to instruct the third device to enable the frequency spread according to the third target frequency spread frequency offset.
  • the third target spreading frequency offset may be equal to the largest one of the first spreading frequency offset and the third spreading frequency offset.
  • the second A device determines to turn on the spread spectrum of the third device and turns on the spread spectrum of the second device, but the first device determines not to turn on its own spread spectrum. That is to say, the first device determines to enable the spread spectrum between the third device and the second device, and not to enable the spread spectrum between the first device and the third device.
  • the first indication information in the second TSB is used to instruct the second device to turn on the frequency band
  • the second indication information in the second TSB is used to instruct the third device to turn on the frequency band.
  • the first indication information and the second indication information may also carry a fourth target spreading frequency offset
  • the first indication information is used to instruct the second device to enable the spreading frequency according to the fourth target spreading frequency offset
  • the second The instruction information is used to instruct the third device to enable the frequency spread according to the fourth target frequency spread frequency offset.
  • the fourth target spreading frequency offset may be equal to the largest one of the second spreading frequency offset and the third spreading frequency offset.
  • the second device receives the second TSB sent by the first device from the third device, and enables or disables its own spread spectrum according to the first indication information in the second TSB. If the first instruction information indicates to enable the spread spectrum of the second device, the second device will enable its own spread spectrum; if the first instruction information indicates not to enable the second device's spread spectrum, then the second device will not enable its own spread spectrum.
  • the third device receives the second TSB from the first device, sends the second TSB to the second device, and enables or disables its own spread spectrum according to the second indication information in the second TSB. If the second instruction information indicates that the third device's spread spectrum is turned on, the third device turns on its own spread spectrum; if the second instruction information indicates that the third device's spread spectrum is not turned on, then the third device does not turn on its own spread spectrum.
  • the first device may also send the third TSB to the second device through the third device, and the third TSB arriving at the second device includes The first spread spectrum capability information of the first device and the third spread spectrum capability information of the third device.
  • the first device first sends the third TSB to the second device through the third device, and after the second device receives the third TSB from the third device, the second device sends the first TSB to the first device through the third device, This is not specifically limited.
  • the first device sends the third TSB to the second device through the third device
  • the first device sends the third TSB to the third device
  • the third TSB includes the first spreading capability of the first device information.
  • the third device receives the third TSB sent by the first device, the third device updates the third TSB, and the updated third TSB includes the first spreading capability information of the first device and the third TSB of the third device.
  • Three spread spectrum capability information that is, the third device adds at least one of indication information of whether it supports spread spectrum or supported third spread spectrum frequency offset to the third TSB.
  • the third device sends the updated third TSB to the second device.
  • the second device sends the first TSB to the first device through the third device, and the first TSB arriving at the first device includes the second spread spectrum capability information of the second device and the third The third spread spectrum capability information of the device; the first device can determine whether to enable the second spread spectrum capability information, the third spread spectrum capability information and the first spread spectrum capability information of the first device, whether to enable Spectrum spread of the third device and whether to enable the spread spectrum of the first device; the first device sends a second TSB to the second device through the third device, the second TSB includes the first indication information and the second indication information, the first indication information The indication information is used to instruct the second device to enable or disable the frequency converter, and the second indication information is used to instruct the third device to enable or disable the frequency converter. Therefore, the method can learn the spread spectrum capability information of the device in the wired high-speed serial link through interaction, and determine whether to enable spread spectrum according to the instruction.
  • the first TSB includes a first type indication field, a payload field and a cyclic redundancy check (CRC) check field.
  • the first type indication field is used to indicate that the first TSB is a discovery training code stream block;
  • the load field in the first TSB is used to carry spread spectrum capability information, including the second spread spectrum capability information of the second device;
  • the CRC check field in is used to check the first TSB.
  • the second TSB includes a second type indication field, a load field and a cyclic redundancy check (CRC) check field.
  • the second type indication field is used to indicate that the second TSB is a configuration training code stream block;
  • the load field in the second TSB is used to carry indication information indicating whether to enable or disable the frequency band, including indicating whether the second device is enabled or not.
  • the CRC check field in the second TSB is used to check the second TSB.
  • the third TSB includes a first type indication field, a load field and a cyclic redundancy check (CRC) check field.
  • the first type indication field is used to indicate that the third TSB is a discovery training code stream block;
  • the load field in the third TSB is used to carry spread spectrum capability information, including the first spread spectrum capability information of the first device;
  • the CRC check field in is used to check the third TSB.
  • the first TSB and the third TSB are DTSB, and the second TSB is CTSB.
  • the first bit in the load field in the DTSB is used to carry the first spread spectrum capability information
  • the second bit in the load field is used to carry the second spread spectrum capability information
  • the third bit in the load field It is used to bear the third spreading capability information.
  • the first bit in the CTSB is used to bear the first indication information
  • the second bit in the payload field is used to bear the second indication information.
  • the first TSB reaching the first device includes spread spectrum capability information of multiple third devices.
  • the third TSB of the second device also includes spread spectrum capability information of multiple third devices. For example, there may be two third devices, including retimer0 and retimer1.
  • the first device is an IO controller in the SOC
  • the second device is an Ethernet card
  • the third device is a retimer.
  • Step 1 The IO controller sends the third DTSB to the Ethernet card through the retimer.
  • Step 2 The Ethernet card sends the first DTSB to the IO controller through the retimer.
  • the retimer sends the updated first DTSB to the IO controller.
  • Step 1 and Step 2 are the information interaction phase of the spread spectrum capability, that is, the discovery phase described in FIG. 4 .
  • Step 3 The IO controller determines to enable the spread spectrum of the retimer and the spread spectrum of the Ethernet card, and sends the second CTSB to the Ethernet card through the retimer.
  • the IO controller determines to enable the spread spectrum of the retimer and the spread spectrum of the Ethernet card, it compares HSSC_PERD, DSSC_PERD and RT_SSC_PERD, selects the maximum value as the target spread frequency offset, and inserts the frequency offset into the SKP.
  • Step 3 is the configuration phase of enabling or not enabling the frequency conversion, that is, the configuration phase described in Figure 4 .
  • Step 1 and Step 2 may be performed simultaneously, and Step 1 may also be performed before Step 2, which is not limited.
  • Step 4 The IO controller transmits service data to the Ethernet card through the retimer.
  • Step 4 is the link establishment success/service interaction stage described in FIG. 4 .
  • FIG. 8 shows a schematic block diagram of a communication device 800 according to the embodiment of the present application.
  • the device may be the first device in the method embodiment of the present application.
  • the communication device 700 includes:
  • a receiving module 810 configured to receive a first training code stream block TSB sent by the second device, where the first TSB includes second spreading capability information of the second device;
  • the sending module 820 is configured to send a second TSB to the second device, the second TSB includes first indication information, and the first indication information is used to instruct the second device to enable or disable the frequency conversion.
  • the device 800 further includes a control module 830, configured to determine whether to enable the spectrum spreading of the second device according to the first spectrum spreading capability information and the second spectrum spreading capability information, wherein the first spectrum spreading capability information
  • a spread spectrum capability information is the spread spectrum capability information of the device.
  • the sending module 820 is further configured to send a third TSB to the second device, where the third TSB includes first spread spectrum capability information, and the first spread spectrum capability information is Spread spectrum capability information.
  • the first spread spectrum capability information includes at least one of indication information of whether the device supports spread spectrum or a first spread spectrum frequency offset supported by the device;
  • the second spread spectrum capability information includes the at least one of the indication information of whether the second device supports spread spectrum or the second spread spectrum frequency offset supported by the second device.
  • control module 830 is specifically configured to: if the first spread spectrum capability information indicates that the device supports spread spectrum, and the second spread spectrum capability information indicates that the second device supports spread spectrum, then Determine to turn on the spread spectrum of the second device; otherwise, determine not to turn on the spread spectrum of the second device.
  • the receiving module 810 is specifically configured to receive, from the third device, the first TSB sent by the second device, where the first TSB further includes the third extension of the third device. frequency capability information;
  • the sending module 820 is specifically configured to send the second TSB to the second device through the third device, the second TSB further includes second indication information, and the second indication information is used to indicate The third device turns on or does not turn on the frequency conversion.
  • control module 830 is further configured to, according to the first spectrum spreading capability information, the second spectrum spreading capability information, and the third spectrum spreading capability information, determine whether to open the spread spectrum, and whether to enable the spread spectrum of the second device.
  • the sending module 820 is further configured to send the third TSB to the second device through the third device, and the third TSB arriving at the second device includes the The first spread spectrum capability information and the third spread spectrum capability information, the third spread spectrum capability information includes indication information of whether the third device supports spread spectrum or the third spread spectrum supported by the third device at least one of the frequency offsets.
  • control module 830 is specifically configured to: if the first spread spectrum capability information indicates that the device supports spread spectrum, the second spread spectrum capability information indicates that the second device supports spread spectrum, and the The third spread spectrum capability information indicates that the third device supports spread spectrum, then determine to enable the spread spectrum of the third device and enable the spread spectrum of the second device; if the first spread spectrum capability information indicates that the device does not Spectrum spreading is supported, and/or, the second spectrum spreading capability information indicates that the second device does not support spectrum spreading, and/or, the third spectrum spreading capability information indicates that the third device does not support spectrum spreading, Then it is determined not to turn on the spread spectrum of the third device and not to turn on the spread spectrum of the second device.
  • control module 830 is specifically configured to: if the first spread spectrum capability information indicates that the device supports spread spectrum, the second spread spectrum capability information indicates that the second device does not support spread spectrum, the The third spread spectrum capability information indicates that the third device supports spread spectrum, then determine to enable the spread spectrum of the third device and not enable the spread spectrum of the second device; if the first spread spectrum capability If the information indicates that the device does not support spread spectrum, the second spread spectrum capability information indicates that the second device supports spread spectrum, and the third spread spectrum capability information indicates that the third device supports spread spectrum, then it is determined to enable the The spread spectrum of the third device is turned on, and the spread spectrum of the second device is turned on.
  • the TSB includes a type indication field, a load field, and a cyclic redundancy check CRC check field, wherein the type indication field is used to indicate that the TSB is a discovery training code stream block or a configuration training code stream block, the load field is used to carry spread spectrum capability information or indication information indicating whether to enable or disable spread spectrum, and the CRC check field is used to check the TSB.
  • the type indication field is used to indicate that the TSB is a discovery training code stream block or a configuration training code stream block
  • the load field is used to carry spread spectrum capability information or indication information indicating whether to enable or disable spread spectrum
  • the CRC check field is used to check the TSB.
  • the first bit in the load field is used to carry the first spreading capability information
  • the second bit in the load field is used to carry the The second spread spectrum capability information
  • the third bit in the load field is used to carry the third spread spectrum capability information
  • the first bit in the load field used to bear the first indication information
  • the second bit in the payload field is used to bear the second indication information.
  • FIG. 9 shows a schematic block diagram of a communication device 900 according to the embodiment of the present application.
  • the device may be the second device in the method embodiment of the present application.
  • the communication device 800 includes:
  • the sending module 910 is configured to send a first training code stream block TSB to the first device, the first TSB includes second spreading capability information of the device, and the second spreading capability information is used for the first a device determines whether to turn on the spread spectrum of the device;
  • the receiving module 920 is configured to receive a second TSB sent by the first device, where the second TSB includes first indication information, and the first indication information is used to instruct the device to turn on or not to turn on the frequency band.
  • the receiving module 920 is further configured to receive a third TSB sent by the first device, where the third TSB includes the first spreading capability information of the first device.
  • the first spread spectrum capability information includes at least one of indication information of whether the first device supports spread spectrum or a first spread spectrum frequency offset supported by the first device; the second spread spectrum The capability information includes at least one of indication information of whether the device supports spread spectrum or a second frequency offset of spread spectrum supported by the device.
  • the sending module 910 is specifically configured to send the first TSB to the first device through the third device, and the first TSB arriving at the first device includes the second spread spectrum Capability information and third spread spectrum capability information of the third device, the third spread spectrum capability information including indication information of whether the third device supports spread spectrum or a third spread spectrum frequency offset supported by the third device at least one of the
  • the receiving module 920 is specifically configured to receive, from the third device, the second TSB sent by the first device, the second TSB further includes second indication information, and the second indication information is used for Instruct the third device to turn on or not to turn on the frequency band.
  • the receiving module 920 is further configured to receive, from the third device, the third TSB sent by the first device, where the third TSB includes the first spread spectrum of the first device Capability information and the third spread spectrum capability information.
  • FIG. 10 shows a schematic block diagram of a communication device 1000 according to the embodiment of the present application.
  • the device may be the first device in the embodiment of the present application, and the device may be an IO controller in the SOC in FIG. 2 .
  • the communication device 1000 includes:
  • Data link layer transmitter responsible for sending valid business data to the physical layer receiver direction (physical layer transmitter, PL_TX).
  • Data distribution module distribute the data encoded by forward error correction (FEC), and arrange them on each physical channel (lane).
  • FEC forward error correction
  • GEN_TSB Generate TSB and send it to MUX.
  • GEN_SKP Generate SKP and send it to MUX.
  • SSC_CTRL judge the spread spectrum capability information output by CHECK_TSB, and control GEN_TSB to generate TSB carrying SSC control information, and control GEN_SKP to periodically send SKP at a certain frequency; wherein, the SSC control information can be the above-mentioned first indication information and second 2. Instructions.
  • SSC_CAP_CFG It implements the registers related to SSC configuration, including the configuration of whether to enable or disable SSC, whether to support SSC capability configuration, etc.
  • MUX controlled by SSC_CTRL, select one channel of information from the input data, TSB and SKP, and output it to the scrambling module.
  • Scrambling module responsible for scrambling the transmitted data.
  • SerDes TX responsible for converting the data output by the scrambling module into a serial code stream and sending it to the wired high-speed serial link.
  • SerDes RX responsible for receiving serial data from the wired high-speed serial link, performing serial-to-parallel conversion, and sending parallel data to the descrambling module.
  • Descrambling module responsible for frame demarcation and descrambling of data.
  • CHECK_TSB Identify the TSB code stream from the received data, and analyze the spread spectrum capability information carried in the TSB.
  • Physical layer receiving direction (data link layer receiver, DL_RX): responsible for receiving data from the physical layer receiving direction (physical layer receiver, PL_RX).
  • the control module 830 in the communication device 800 in the embodiment of the present application includes GEN_TSB, SSC_CTRL, SSC_CAP_CFG and CHECK_TSB.
  • FIG. 11 shows a schematic block diagram of the communication device 1100 according to the embodiment of the present application.
  • the communication device 1100 includes: a processor 1110, a memory 1120, and a communication interface 1130;
  • the memory 1120 is used to store executable instructions
  • the processor 1110 is coupled to the memory 1120 through the communication interface 1130, and the processor 1110 is configured to invoke and execute the executable instructions in the memory 1120, so as to implement the method in the embodiment of the present application.
  • the communication device may include the first device or the second device in the embodiment of the present application.
  • the above-mentioned processor 1110 may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • Program logic devices discrete gate or transistor logic devices, discrete hardware components.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the embodiment of the present application also provides a communication device, the communication device includes an input and output interface and a logic circuit, and the input and output interface is used to receive or output information; the logic circuit is used to execute any one of the methods above method in the example.
  • the embodiment of the present application also provides a computer-readable storage medium, on which a computer program for implementing the method in the above method embodiment is stored.
  • a computer program for implementing the method in the above method embodiment is stored.
  • the computer program runs on the computer or the processor, the computer or the processor can implement the methods in the above method embodiments.
  • the embodiment of the present application also provides a computer program product, the computer program product includes computer program code, and when the computer program code is run on the computer, the method in the above method embodiment is executed.
  • the embodiment of the present application also provides a chip, including a processor, the processor is connected to a memory, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the The chip executes the method in the above method embodiment.
  • the term "and/or” in this application is only an association relationship describing associated objects, indicating that there may be three relationships, for example, A and/or B may indicate: A exists alone, and A and B exist simultaneously , there are three cases of B alone.
  • the character "/" in this article generally means that the contextual objects are an "or” relationship; the term “at least one” in this application can mean “one” and "two or more", for example, A , B and C, can mean: A exists alone, B exists alone, C exists alone, A and B exist simultaneously, A and C exist simultaneously, C and B exist simultaneously, A, B and C exist simultaneously, these seven kinds Condition.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

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Abstract

本申请提供了一种控制展频的方法和装置，能够获知高速串行链路中的装置的展频能力信息，从而可以指示是否打开展频。该方法包括：第一装置接收第二装置发送的第一TSB，该第一TSB中包括第二装置的第二展频能力信息；第一装置根据该第一装置的第一展频能力信息和第二展频能力信息，确定是否打开第二装置的展频；该第一装置向第二装置发送第二TSB，该第二TSB中包括第一指示信息，该第一指示信息用于指示该第二装置打开或不打开展频。

Description

控制展频的方法和装置
本申请要求于2021年12月31日提交中国专利局、申请号为202111674448.8、发明名称为“控制展频的方法和装置”的专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及一种控制展频的方法和装置。
背景技术
在现代计算机系统中，外设总线接口(peripheral component interface express，PCIe)作为一种关键的高速互联接口被广泛应用。印制电路板(printed circuit board，PCB)上的高速串行链路由于频点高、频谱集中，对其他电路会产生一定的电磁干扰。
扩展频谱(spread spectrum，SSC)技术是PCIe物理层降低串化器/解串化器(serializer and deserializer，SerDes)差分信号对其他设备的电磁干扰而增加的一种技术，开启SSC后会对参考时钟使用低频时钟进行调制，高速电压差分信号(low-voltage differential signaling，LVDS)的噪声频谱不会那么集中，以此提高电磁兼容性。
目前，软件开发人员只能根据产品的硬件互联形态等信息来预先知道高速串行链路中的产品是否支持展频的相关信息，过程比较复杂；预先知道是否支持展频的相关信息后需要开发出控制展频开关的软件，由于不同产品中的硬件互联形态多样且对接的器件来自不同的厂商，导致软件开发的成本较高、维护工作量大；并且在高速串行链路中有重定时器(retimer)时，该retimer不一定具备支持SSC的能力，限制了产品中SSC的应用。
发明内容
本申请提供了一种控制展频的方法和装置，能够获知高速串行链路中的装置的展频能力信息，从而可以指示是否打开展频。
第一方面，提供一种控制展频的方法，适用于有线高速串行链路，该方法可以由网络装置或网络装置侧的芯片或芯片系统执行。该方法包括：第一装置接收第二装置发送的第一训练码流块TSB，所述第一TSB中包括所述第二装置的第二展频能力信息；所述第一装置向所述第二装置发送第二TSB，所述第二TSB中包括第一指示信息，所述第一指示信息用于指示所述第二装置打开或不打开展频。
基于上述技术方案，第二装置可以向第一装置发送该第二装置的第二展频能力信息，第一装置接收第二装置发送的第二展频能力信息，即第一装置和第二装置之间可以交互展频能力信息；第一装置根据第二展频能力信息和第一装置的第一展频能力信息，可以确定是否打开第二装置展频和第一装置的展频；第一装置可以向第二装置发送第一指示信息，该第一指示信息用于指示第二装置打开或不打开展频。现有技术中软件开发人员只能根据装置的硬件互联形态等信息来预先知道有线高速串行链路中的装置是否支持展频，过程比 较复杂；预先知道是否支持展频的相关信息后需要开发出控制展频开关的软件，由于不同产品中的硬件互联形态多样且对接的器件来自不同的厂商，导致软件开发的成本较高、维护工作量大。相比于根据装置的硬件互联形态来预先知道有线高速串行链路中的装置是否支持展频并开发出控制展频开关的软件，本方案中不同装置之间通过交互展频能力信息来确定并指示是否打开展频的方法更加便捷、高效。因此，本申请提供的控制展频的方法能够获知有线高速串行链路中的装置的展频能力信息，从而可以确定并指示是否打开展频。
结合第一方面，在第一方面的某些实现方式中，在所述第一装置向所述第二装置发送第二TSB之前，所述方法还包括：所述第一装置根据第一展频能力信息和所述第二展频能力信息，确定是否打开所述第二装置的展频，其中，所述第一展频能力信息是所述第一装置的展频能力信息。
结合第一方面，在第一方面的某些实现方式中，所述第一展频能力信息包括所述第一装置是否支持展频的指示信息或所述第一装置支持的第一展频频偏中的至少一项；所述第二展频能力信息包括所述第二装置是否支持展频的指示信息或所述第二装置支持的第二展频频偏中的至少一项。应理解，展频频偏可以理解为，打开展频后提供给SerDes的参考时钟频率会在一定范围内周期性变化，频率偏离基准的最大值为展频频偏，应当理解，展频频偏也可以称为展频幅度。
结合第一方面，在第一方面的某些实现方式中，所述第一装置根据第一展频能力信息和所述第二展频能力信息，确定是否打开所述第二装置的展频，包括：若所述第一展频能力信息指示所述第一装置支持展频，且所述第二展频能力信息指示所述第二装置支持展频，则所述第一装置确定打开所述第二装置的展频；若所述第一展频能力信息指示所述第一装置不支持展频，或，所述第二展频能力信息指示所述第二装置不支持展频，或，所述第一展频能力信息指示所述第一装置不支持展频以及所述第二展频能力信息指示所述第二装置不支持展频，则所述第一装置确定不打开所述第二装置的展频。
应理解，若所述第一装置和所述第二装置都支持展频，则第一装置确定打开所述第二装置的展频、也打开自己的展频；若所述第一装置和所述第二装置中的任一装置不支持展频或所述第一装置和所述第二装置都不支持展频，则所述第一装置确定不打开所述第二装置的展频、也不打开自己的展频。
结合第一方面，在第一方面的某些实现方式中，若所述第一装置确定打开所述第二装置的展频，则所述第一装置根据所述第一展频频偏和所述第二展频频偏，确定第一目标展频频偏；所述第一指示信息中携带所述第一目标展频频偏，所述第一指示信息用于指示所述第二装置根据所述第二目标展频频偏打开展频。
结合第一方面，在第一方面的某些实现方式中，所述第一装置根据所述第一展频频偏和所述第二展频频偏，确定第一目标展频频偏，包括：若所述第一展频频偏大于或等于所述第二展频频偏，则所述第一目标展频频偏等于所述第一展频频偏；若所述第一展频频偏小于所述第二展频频偏，则所述第一目标展频频偏等于所述第二展频频偏。应理解，确定较大的展频频偏为目标展频频偏，可以避免频偏的补偿不够，防止传输的数据溢出。
结合第一方面，在第一方面的某些实现方式中，所述第一装置接收第二装置发送的第一训练码流块TSB，包括：所述第一装置从第三装置接收所述第二装置发送的所述第一TSB，其中，所述第一TSB中还包括所述第三装置的第三展频能力信息；所述第一装置向 所述第二装置发送第二TSB，包括：所述第一装置通过所述第三装置向所述第二装置发送所述第二TSB，所述第二TSB中还包括第二指示信息，所述第二指示信息用于指示所述第三装置打开或不打开展频。
上述方案中，第一装置与第二装置之间存在第三装置，该第三装置可以为retimer，第一装置从该第三装置接收第二装置发送的第一TSB，该第一TSB中包括第二装置的第二展频能力信息和第三装置的第三展频能力信息；第一装置根据第一装置的第一展频能力信息、第二展频能力信息以及第三展频能力信息，确定是否打开第三装置展频和第二装置的展频；第一装置通过第三装置向第二装置发送第二TSB，该第二TSB中包括用于指示第二装置打开展频的第一指示信息和用于指示第三装置打开展频的第二指示信息。该方案能够实现高速串行链路中的装置交互展频能力信息，并通过发送指示信息指示其他装置打开或不打开展频。
结合第一方面，在第一方面的某些实现方式中，在所述第一装置通过所述第三装置向所述第二装置发送所述第二TSB之前，所述方法还包括：所述第一装置根据第一展频能力信息、所述第二展频能力信息和所述第三展频能力信息，确定是否打开所述第三装置的展频、以及是否打开所述第二装置的展频。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：所述第一装置通过所述第三装置向所述第二装置发送所述第三TSB，到达所述第二装置的所述第三TSB中包括所述第一装置的第一展频能力信息和所述第三展频能力信息，所述第三展频能力信息包括所述第三装置是否支持展频的指示信息或所述第三装置支持的第三展频频偏中的至少一项。
结合第一方面，在第一方面的某些实现方式中，所述第一装置根据第一展频能力信息、所述第二展频能力信息和所述第三展频能力信息，确定是否打开所述第三装置的展频、以及是否打开所述第二装置的展频，包括：若所述第一展频能力信息指示所述第一装置支持展频、所述第二展频能力信息指示所述第二装置支持展频以及所述第三展频能力信息指示所述第三装置支持展频，则所述第一装置确定打开所述第三装置的展频、打开所述第二装置的展频；若所述第一展频能力信息指示第一装置不支持展频、和/或、所述第二展频能力信息指示所述第二装置不支持展频、和/或、所述第三展频能力信息指示所述第三装置不支持展频，则所述第一装置确定不打开所述第三装置的展频、不打开所述第二装置的展频。结合第一方面，在第一方面的某些实现方式中，所述第一装置根据第一展频能力信息、所述第二展频能力信息和所述第三展频能力信息，确定是否打开所述第三装置的展频、以及是否打开所述第二装置的展频，包括：若所述第一展频能力信息指示所述第一装置支持展频、所述第二展频能力信息指示所述第二装置不支持展频、所述第三展频能力信息指示所述第三装置支持展频，则所述第一装置确定打开所述第三装置的展频、不打开所述第二装置的展频；若所述所述第一展频能力信息指示所述第一装置不支持展频、所述第二展频能力信息指示所述第二装置支持展频、所述第三展频能力信息指示所述第三装置支持展频，则所述第一装置确定打开所述第三装置的展频、打开所述第二装置的展频。
应理解，第一装置与第三装置直接交互，第三装置与第二装置直接交互；若第一装置和第三装置支持展频、第二装置不支持展频，可以打开第一装置的展频和第三装置的展频，不打开第二装置的展频对数据传输没有影响；若第三装置和第二装置支持展频、第一装置 不支持展频，可以打开第三装置的展频和第二装置的展频，不打开第一装置的展频对数据传输没有影响。
结合第一方面，在第一方面的某些实现方式中，若所述第一装置确定打开所述第三装置的展频、打开所述第二装置的展频，则所述第一装置根据所述第一展频频偏、所述第二展频频偏和所述第三展频频偏，确定第二目标展频频偏；所述第一指示信息和所述第二指示信息中携带所述第二目标展频频偏。所述第一指示信息用于指示所述第二装置根据所述第二目标展频频偏打开展频，所述第二指示信息用于指示所述第三装置根据所述第二目标展频频偏打开展频。
结合第一方面，在第一方面的某些实现方式中，所述第二目标展频频偏为所述第一展频频偏、所述第二展频频偏和所述第三展频频偏中的最大的一个。
结合第一方面，在第一方面的某些实现方式中，所述TSB中包括类型指示字段、负载字段和循环冗余校验CRC校验字段，其中，所述类型指示字段用于指示所述TSB为发现训练码流块或者配置训练码流块，所述负载字段用于承载展频能力信息或指示打开或不打开展频的指示信息，所述CRC校验字段用于对所述TSB进行校验。
结合第一方面，在第一方面的某些实现方式中，当所述TSB为发现训练码流块时，所述负载字段中的第一比特用于承载所述第一展频能力信息，所述负载字段中的第二比特用于承载所述第二展频能力信息，所述负载字段中的第三比特用于承载所述第三展频能力信息；当所述TSB为配置训练码流块时，所述负载字段中的第一比特用于承载所述第一指示信息、所述负载字段中的第二比特用于承载所述第二指示信息。
结合第一方面，在第一方面的某些实现方式中，所述打开展频包括时钟芯片或展频发生器使用低频时钟对参考时钟进行调制；所述不打开展频包括时钟芯片或展频发生器不对参考时钟进行调制。
第二方面，提供一种控制展频的方法，适用于有线高速串行链路，该方法可以由网络装置或网络装置侧的芯片或芯片系统执行。该方法包括：第二装置向第一装置发送第一训练码流块TSB，所述第一TSB中包括所述第二装置的第二展频能力信息，所述第二展频能力信息用于所述第一装置确定是否打开所述第二装置的展频；所述第二装置接收所述第一装置发送的第二TSB，所述第二TSB中包括第一指示信息，所述第一指示信息用于指示所述第二装置打开或不打开展频。
基于上述技术方案，第二装置通过第三装置向第一装置发送第一TSB，到达第一装置的第一TSB中包括第二装置的第二展频能力信息和第三装置的第三展频能力信息；第一装置根据第二展频能力信息、第三展频能力信息和第一装置的第一展频能力信息，可以确定是否打开第二装置展频、是否打开第三装置的展频以及是否打开第一装置的展频；第一装置通过第三装置向第二装置发送第二TSB，该第二TSB中包括第一指示信息和第二指示信息，该第一指示信息用于指示第二装置打开或不打开展频，该第二指示信息用于指示第三装置打开或不打开展频。因此，该方法能够通过交互获知有线高速串行链路中的装置的展频能力信息，并根据指示确定是否打开展频。
结合第二方面，在第二方面的某些实现方式中，所方法还包括：所述第二装置接收所述第一装置发送的第三TSB，所述第三TSB中包括所述第一装置的第一展频能力信息。
结合第二方面，在第二方面的某些实现方式中，所述第一展频能力信息包括所述第一 装置是否支持展频的指示信息或所述第一装置支持的第一展频频偏中的至少一项；所述第二展频能力信息包括所述第二装置是否支持展频的指示信息或所述第二装置支持的第二展频频偏中的至少一项。
结合第二方面，在第二方面的某些实现方式中，所述第二装置向第一装置发送第一训练码流块TSB，包括：所述第二装置通过第三装置向所述第一装置发送所述第一TSB，到达所述第一装置的所述第一TSB中包括所述第二展频能力信息和所述第三装置的第三展频能力信息，所述第三展频能力信息包括所述第三装置是否支持展频的指示信息或所述第三装置支持的第三展频频偏中的至少一项；所述第二装置接收所述第一装置发送的第二TSB，包括：所述第二装置从所述第三装置接收所述第一装置发送的所述第二TSB，所述第二TSB中还包括第二指示信息，所述第二指示信息用于指示所述第三装置打开或不打开展频。
结合第二方面，在第二方面的某些实现方式中，所述方法还包括：所述第二装置从所述第三装置接收所述第一装置发送的所述第三TSB，所述第三TSB中包括所述第一装置的第一展频能力信息和所述第三展频能力信息。
结合第二方面，在第二方面的某些实现方式中，所述TSB中包括类型指示字段、负载字段和循环冗余校验CRC校验字段，其中，所述类型指示字段用于指示所述TSB为发现训练码流块或者配置训练码流块，所述负载字段用于承载展频能力信息或指示打开或不打开展频的指示信息，所述CRC校验字段用于对所述TSB进行校验。
结合第二方面，在第二方面的某些实现方式中，当所述TSB为发现训练码流块时，所述负载字段中的第一比特用于承载所述第一展频能力信息，所述负载字段中的第二比特用于承载所述第二展频能力信息，所述负载字段中的第三比特用于承载所述第三展频能力信息；当所述TSB为配置训练码流块时，所述负载字段中的第一比特用于承载所述第一指示信息、所述负载字段中的第二比特用于承载所述第二指示信息。
结合第二方面，在第二方面的某些实现方式中，所述打开展频包括时钟芯片或展频发生器使用低频时钟对参考时钟进行调制；所述不打开展频包括时钟芯片或展频发生器不对参考时钟进行调制。
第三方面，提供一种控制展频的方法，适用于有线高速串行链路，该方法可以由网络装置或网络装置侧的芯片或芯片系统执行。该方法包括：第三装置接收第二装置发送的第一训练码流块TSB，所述第一TSB中包括所述第二装置的第二展频能力信息；所述第三装置更新所述第一TSB，更新后的所述第一TSB中包括所述第三装置的第三展频能力信息和所述第二展频能力信息，所述第二展频能力信息和所述第三展频能力信息用于第一装置确定是否打开所述第三装置的展频、以及是否打开所述第二装置的展频；所述第三装置向所述第一装置发送所述更新后的所述第一TSB；所述第三装置接收所述第一装置发送的第二TSB，所述第二TSB中包括第一指示信息和第二指示信息，所述第一指示信息用于指示所述第二装置打开或不打开展频，所述第三指示信息用于指示所述第三装置打开或不打开展频；所述第三装置根据所述第三指示信息，确定打开或不打开所述第三装置的展频；所述第三装置向所述第二装置发送所述第二TSB。
基于上述技术方案，第三装置可以将第二装置的第二展频能力信息以及该第三装置的第三展频能力信息发送给第一装置；第一装置根据第二展频能力信息、第三展频能力信息 和第一装置的第一展频能力信息，可以确定是否打开第二装置展频、是否打开第三装置的展频以及是否打开第一装置的展频；第三装置接收并转发第一装置发送第二TSB，该第二TSB中包括第一指示信息和第二指示信息，该第一指示信息用于指示第二装置打开或不打开展频，该第二指示信息用于指示第三装置打开或不打开展频。因此，该方法能够通过交互获知有线高速串行链路中的装置的展频能力信息，并根据指示确定是否打开展频。
结合第三方面，在第三方面的某些实现方式中，所述方法还包括：所述第三装置接收所述第一装置发送的第三TSB，所述第三TSB中包括所述第一装置的第一展频能力信息；所述第三装置更新所述第三TSB，更新后的所述第三TSB中包括所述第三装置的第三展频能力信息和所述第一展频能力信息；所述第三装置向所述第二装置发送所述更新后的所述第三TSB。
结合第三方面，在第三方面的某些实现方式中，所述第一展频能力信息包括所述第一装置是否支持展频的指示信息或所述第一装置支持的第一展频频偏中的至少一项；所述第二展频能力信息包括所述第二装置是否支持展频的指示信息或所述第二装置支持的第二展频频偏中的至少一项；所述第三展频能力信息包括所述第三装置是否支持展频的指示信息或所述第三装置支持的第三展频频偏中的至少一项。
第四方面，提供了一种通信装置，该装置可以为第一方面所述的第一装置，该装置包括：接收模块，用于接收第二装置发送的第一训练码流块TSB，所述第一TSB中包括所述第二装置的第二展频能力信息；发送模块，用于向所述第二装置发送第二TSB，所述第二TSB中包括第一指示信息，所述第一指示信息用于指示所述第二装置打开或不打开展频。
结合第四方面，在第四方面的某些实现方式中，所述装置还包括控制模块，用于根据第一展频能力信息和所述第二展频能力信息，确定是否打开所述第二装置的展频，其中，所述第一展频能力信息是所述装置的展频能力信息。
结合第四方面，在第四方面的某些实现方式中，所述发送模块还用于，向所述第二装置发送第三TSB，所述第三TSB中包括第一展频能力信息，所述第一展频能力信息是所述装置的展频能力信息。
结合第四方面，在第四方面的某些实现方式中，所述第一展频能力信息包括所述装置是否支持展频的指示信息或所述装置支持的第一展频频偏中的至少一项；所述第二展频能力信息包括所述第二装置是否支持展频的指示信息或所述第二装置支持的第二展频频偏中的至少一项。
结合第四方面，在第四方面的某些实现方式中，所述控制模块具体用于：若所述第一展频能力信息指示所述装置支持展频，且所述第二展频能力信息指示所述第二装置支持展频，则确定打开所述第二装置的展频；否则，确定不打开所述第二装置的展频。
结合第四方面，在第四方面的某些实现方式中，所述接收模块具体用于，从第三装置接收所述第二装置发送的所述第一TSB，其中，所述第一TSB中还包括所述第三装置的第三展频能力信息；所述发送模块具体用于，通过所述第三装置向所述第二装置发送所述第二TSB，所述第二TSB中还包括第二指示信息，所述第二指示信息用于指示所述第三装置打开或不打开展频。
结合第四方面，在第四方面的某些实现方式中，所述控制模块还用于，根据所述第一 展频能力信息、所述第二展频能力信息和所述第三展频能力信息，确定是否打开所述第三装置的展频、以及是否打开所述第二装置的展频。
结合第四方面，在第四方面的某些实现方式中，所述发送模块还用于，通过所述第三装置向所述第二装置发送所述第三TSB，到达所述第二装置的所述第三TSB中包括所述装置的所述第一展频能力信息和所述第三展频能力信息，所述第三展频能力信息包括所述第三装置是否支持展频的指示信息或所述第三装置支持的第三展频频偏中的至少一项。
结合第四方面，在第四方面的某些实现方式中，所述控制模块具体用于：若所述第一展频能力信息指示所述装置支持展频、所述第二展频能力信息指示所述第二装置支持展频以及所述第三展频能力信息指示所述第三装置支持展频，则确定打开所述第三装置的展频、打开所述第二装置的展频；若所述第一展频能力信息指示装置不支持展频、和/或、所述第二展频能力信息指示所述第二装置不支持展频、和/或、所述第三展频能力信息指示所述第三装置不支持展频，则确定不打开所述第三装置的展频、不打开所述第二装置的展频。
结合第四方面，在第四方面的某些实现方式中，所述控制模块具体用于：若所述第一展频能力信息指示所述装置支持展频、所述第二展频能力信息指示所述第二装置不支持展频、所述第三展频能力信息指示所述第三装置支持展频，则确定打开所述第三装置的展频、不打开所述第二装置的展频；若所述所述第一展频能力信息指示所述装置不支持展频、所述第二展频能力信息指示所述第二装置支持展频、所述第三展频能力信息指示所述第三装置支持展频，则确定打开所述第三装置的展频、打开所述第二装置的展频。
结合第四方面，在第四方面的某些实现方式中，所述TSB中包括类型指示字段、负载字段和循环冗余校验CRC校验字段，其中，所述类型指示字段用于指示所述TSB为发现训练码流块或者配置训练码流块，所述负载字段用于承载展频能力信息或指示打开或不打开展频的指示信息，所述CRC校验字段用于对所述TSB进行校验。
结合第四方面，在第四方面的某些实现方式中，当所述TSB为发现训练码流块时，所述负载字段中的第一比特用于承载所述第一展频能力信息，所述负载字段中的第二比特用于承载所述第二展频能力信息，所述负载字段中的第三比特用于承载所述第三展频能力信息；当所述TSB为配置训练码流块时，所述负载字段中的第一比特用于承载所述第一指示信息、所述负载字段中的第二比特用于承载所述第二指示信息。
第五方面，提供了一种通信装置，该装置可以为第二方面所述的第二装置，该装置包括：发送模块，用于向第一装置发送第一训练码流块TSB，所述第一TSB中包括所述装置的第二展频能力信息，所述第二展频能力信息用于所述第一装置确定是否打开所述装置的展频；接收模块，接收所述第一装置发送的第二TSB，所述第二TSB中包括第一指示信息，所述第一指示信息用于指示所述装置打开或不打开展频。
结合第五方面，在第五方面的某些实现方式中，所述接收模块还用于，接收所述第一装置发送的第三TSB，所述第三TSB中包括所述第一装置的第一展频能力信息。
结合第五方面，在第五方面的某些实现方式中，所述第一展频能力信息包括所述第一装置是否支持展频的指示信息或所述第一装置支持的第一展频频偏中的至少一项；所述第二展频能力信息包括所述装置是否支持展频的指示信息或所述装置支持的第二展频频偏中的至少一项。
结合第五方面，在第五方面的某些实现方式中，所述发送模块具体用于，通过第三装置向所述第一装置发送所述第一TSB，到达所述第一装置的所述第一TSB中包括所述第二展频能力信息和所述第三装置的第三展频能力信息，所述第三展频能力信息包括所述第三装置是否支持展频的指示信息或所述第三装置支持的第三展频频偏中的至少一项；所述接收模块具体用于，从所述第三装置接收所述第一装置发送的所述第二TSB，所述第二TSB中还包括第二指示信息，所述第二指示信息用于指示所述第三装置打开或不打开展频。
结合第五方面，在第五方面的某些实现方式中，所述接收模块还用于，从所述第三装置接收所述第一装置发送的所述第三TSB，所述第三TSB中包括所述第一装置的第一展频能力信息和所述第三展频能力信息。
第六方面，提供一种通信设备，包括：处理器和存储器，所述存储器用于存储计算机程序，所述处理器用于执行所述存储器中存储的计算机程序，以使得所述通信设备执行上述任一方面或任一方面中任意可能的实现方式中的方法。
第七方面，提供了一种通信设备，包括：输入输出接口和逻辑电路，该输入输出接口，用于接收或输出信息；该逻辑电路用于执行上述任一方面或任一方面中任意可能的实现方式所述的方法。
第八方面，提供了一种通信系统，包括：第一方面所述方法的第一装置、第二方面所述方法的第二装置以及第三方面所述方法的第三装置。
第九方面，提供了一种计算机可读存储介质，所述计算机可读介质存储有计算机程序；所述计算机程序或处理器在计算机上运行时，使得所述计算机或所述处理器执行上述任一方面或任一方面中任一种可能实现方式中的方法。
第十方面，提供一种包含指令的计算机程序产品，所述指令被计算机执行时使得通信装置实现上述任一方面或任一方面中任一种可能实现方式中的方法。
附图说明
图1是高速串行接口使用参考时钟的场景示意图。
图2是高速串行接口控制器在SOC芯片系统中应用的示例。
图3是本申请实施例提出的TSB的数据结构示意图。
图4是本申请实施例的协商流程示意图。
图5是本申请实施例提出的一种控制展频的方法的示意性流程交互图。
图6是本申请实施例提出的另一种控制展频的方法的示意性流程交互图。
图7是本申请实施例提出的控制展频的方法的一种示例。
图8是本申请实施例的一种通信装置的示意性框图。
图9是本申请实施例的另一种通信装置的示意性框图。
图10是本申请实施例的另一种通信装置的示意性框图。
图11是本申请实施例的一种通信设备的示意性框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例可以应用于各种通信系统，例如无线局域网系统(wireless local area network，WLAN)、窄带物联网系统(narrow band-internet of things，NB-IoT)、全球移动通信系统(global system for mobile communications，GSM)、增强型数据速率GSM演进系统(enhanced data rate for gsm evolution，EDGE)、宽带码分多址系统(wideband code division multiple access，WCDMA)、码分多址2000系统(code division multiple access，CDMA2000)、时分同步码分多址系统(time division-synchronization code division multiple access，TD-SCDMA)，长期演进系统(long term evolution，LTE)、卫星通信、第五代(5th generation，5G)系统或者将来出现的新的通信系统等。
适用于本申请的通信系统，包括一个或多个发送端，以及一个或多个接收端。其中，发送端和接收端之间的信号传输，可以是通过无线电波来传输，也可以通过可见光、激光、红外以及光纤等传输媒介来传输。
示例性地，发送端和接收端中的一个可以为终端设备，另一个可以为网络设备。示例性地，发送端和接收端都可以为终端设备。
本申请实施例中所涉及到的终端设备可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备。终端可以是移动台(mobile station，MS)、用户单元(subscriber unit)、用户设备(user equipment，UE)、蜂窝电话(cellular phone)、智能电话(smart phone)、无线数据卡、个人数字助理(personal digital assistant，PDA)电脑、平板型电脑、无线调制解调器(modem)、手持设备(handset)、膝上型电脑(laptop computer)、机器类型通信(machine type communication，MTC)终端等。其中，用户设备包括车辆用户设备。
示例性地，网络设备可以是演进型节点B(evolved Node B,eNB)、无线网络控制器(radio network controller,RNC)、节点B(Node B，NB)、基站控制器(base station controller,BSC)、基站收发台(base transceiver station,BTS)、家庭基站(home evolved NodeB,或home Node B,HNB)、基带单元(baseband unit,BBU)，无线保真(wireless fidelity,WIFI)系统中的接入点(access point,AP)、无线中继节点、无线回传节点、传输点(transmission point,TP)或者发送接收点(transmission and reception point，TRP)等，还可以为新空口(new radio,NR)中的gNB或传输点(例如，TRP或TP)，NR中的基站的一个或一组(包括多个)天线面板，或者，还可以为构成gNB或传输点的网络节点，例如基带单元(building baseband unit，BBU)或分布式单元(distributed unit，DU)等，或者，网络设备还可以为车载设备、可穿戴设备以及5G网络中的网络设备，或者未来演进的PLMN网络中的网络设备等，不作限定。
网络设备的产品形态十分丰富。例如，在产品实现过程中，BBU可以与射频单元(radio frequency unit，RFU)集成在同一设备内，该设备通过线缆(例如但不限于馈线)连接至天线阵列。BBU还可以与RFU分离设置，二者之间通过光纤连接，通过例如但不限于，通用公共射频接口(common public radio interface，CPRI)协议进行通信。在这种情况下，RFU通常称为射频拉远单元(remote radio unit，RRU)，其通过线缆连接至天线阵列。此外，RRU还可以与天线阵列集成在一起，例如，目前市场上的有源天线单元(active antenna unit，AAU)产品就采用了这种结构。
此外，BBU可以进一步分解为多个部分。例如，可以按照所处理业务的实时性将BBU 进一步细分为集中单元(centralized unit，CU)和分布单元(distribute unit，DU)。CU负责处理非实时协议和服务，DU负责处理物理层协议和实时服务。更进一步的，部分物理层功能还可以从BBU或者DU中分离出来，集成在AAU中。
为了便于对本申请实施例的理解，对本申请实施例涉及到的扩展频谱技术进行简单介绍。扩展频谱技术是一种常用的无线通讯技术，简称展频技术。当主板上的时钟发生器工作时，脉冲的峰值会产生电磁干扰，展频技术可以降低脉冲发生器所产生的电磁干扰。在本申请实施例中，扩展频谱统一称之为展频。
在现代计算机系统中，外设总线接口作为一种关键的高速互联接口被广泛应用。PCB上的高速串行链路由于频点高、频谱集中，对其他电路会产生一定的电磁干扰。
展频是PCIe物理层降低串化器/解串化器差分信号对其他设备的电磁干扰而增加的一种技术，打开SSC后展频硬件模块会对参考时钟使用低频时钟进行调制，高速电压差分信号的噪声频谱不会那么集中，以此提高电磁兼容性。
如图1所示，出示了高速串行接口使用参考时钟的场景示意图。芯片外部需要给PCIe提供符合规范要求的参考时钟，一般工作在主(host)模式的PCIe会将自身使用的参考时钟输出，retimer和设备(divice)可以选择使用host输出的参考时钟，也可以选择使用本地单板上提供的参考时钟。
发送端/发送装置可以通过控制单板上的时钟芯片打开展频和关闭展频，或者控制PCIe的SerDes中自带的SSC发生器打开展频和关闭展频。其中，打开展频可以理解为时钟芯片或SSC发生器使用低频时钟对参考时钟进行调制，调制后的参考时钟为打开展频后传输的参考时钟，可以降低参考时钟产生的电磁干扰；关闭展频可以理解为时钟芯片或SSC发生器不对参考时钟进行调制，即不做任何处理。
TX开启展频需要知道RX是否支持展频，但PCIe协议中又没有定义相关的码流和软硬件流程来交流双方的展频能力信息，进而导致目前产品使用只能依靠软件预先知道相关信息后更换固件适配，无法动态协商；并且在高速串行链路中有retimer时，无法知道retimer是否支持展频的指示信息、支持的展频频偏，限制了产品中展频的应用。
同时，PCIe协议允许展频频偏可以在一定范围内变化，如果TX一直按最大频偏插入消除频偏码流(skip，SKP)，对链路的性能会造成影响，例如，按最大频偏幅度插入SKP会损失2％性能。
目前，可以在PCIe中加入系统管理总线(system management bus，SM Bus)来收集链路中各个端口支持SSC的能力，通过能力信息判断SSC的开/关。但是该方案在链路中有retimer存在时，链路两端不能独立开关SSC，换言之，链路中的所有装置或设备都必须一起开/关SSC；并且，硬件上需要加入SM Bus来收集各端口的信息，增加了复杂度和成本；除此之外，该方案中SKP的插入频率无法调整。
为此，本申请实施例中提出了控制展频的方法，该方法能够通过发送训练码流块来获知有线高速串行链路中的装置的展频能力信息，并发送指示信息指示有线高速串行链路中的装置打开或不打开展频。
如图2所示，出示了高速串行接口控制器(input output controler，IO controler)在片上系统(system on chip，SOC)中应用的示例。该SOC使用有线高速串行接口连接了一块以太网卡(network card)，SOC使用以太网卡与外部网络进行通信。SOC与以太网卡 之间串接了2级重定时器，包括重定时器0(retimer0)和重定时器1(retimer1)，重定时器用于中继SOC与以太网卡之间传输的数据。
高速串行接口控制器集成在SOC中，与SOC的系统总线相连，在系统总线上还连接有中央处理器(central processing unit，CPU)、直接存储器访问控制器(direct memory access controler，DMAC)以及存储器(memory)等芯片组件。物理层(physical layer，PHY)属于高速串行接口控制器的一部分，高速串行接口控制器通过SerDes与外部的一个以太网卡设备(device)对接，构成一个拥有高速IO接口以及retimer的芯片系统。
为了便于对本申请实施例的理解，对本申请实施例中涉及的训练码流块(training set block，TSB)进行简单介绍。TSB包括发现训练码流块(discovery training set block，DTSB)、配置训练码流块(configuration training set block，CTSB)、均衡训练码流块(equalization training set block，ETSB)、重训练训练码流块(retrain training set block，RTSB)以及统一的训练码流块(unified training set block，UTSB)等。
训练码流块由发送端或接收端在建立高速串行链路过程中发送，训练码流块中承载了建立高速串行链路需要的一些信息。如图3所示，出示了本申请实施例提出的TSB的数据结构示意图。TSB中包括：
(1)TSB类型(type)指示字段，指示协商过程所处的状态。比如，“0xA0”指示发现(discovery)状态，指示该TSB为DTSB；“0xB0”指示配置(configuration)状态，指示该TSB为CTSB；“other”指示保留字段。
(2)TSB负载字段：携带协商相关信息，其长度可以为任意值。例如，携带有线高速串行链路中的装置是否支持展频的指示信息或支持的展频频偏中的至少一项，以及用于指示打开或不打开展频的指示信息等。
(3)TSB循环冗余校验码(cyclic redundancy check，CRC)：用于校验确认整个TSB的正确性，确保在有误码情况下协商信息传递无误。
在本申请实施例中，是否打开展频的协商流程包括发现(discovery)阶段、配置(configuration)阶段以及建链成功(link active)/业务交互阶段。如图4所示，出示了本申请实施例的协商流程示意图。
发现阶段：发送端和接收端使用DTSB进行是否支持展频的指示信息、支持的展频频偏进行交互。在该阶段，发送端可以发送DTSB，该DTSB中包括发送端是否支持展频的指示信息或支持的展频频偏中的至少一项，retimer在转发DTSB时，会根据自身是否支持展频的指示信息或支持的展频频偏中的至少一项，修改DTSB中相关域段，用于告诉接收端自身对展频的支持情况、支持的展频频偏中的至少一项。接收端也可以发送DTSB，该DTSB中包括接收端是否支持展频的指示信息或支持的展频频偏中的至少一项，retimer在转发DTSB时，也会根据自身是否支持展频的指示信息或支持的展频频偏中的至少一项，修改DTSB中相关域段，用于告诉发送端自身对展频的支持情况、支持的展频频偏。
配置阶段：使用CTSB进行打开或不打开展频的握手确认。在该阶段，发送端解析接收端发送的DTSB以获取retimer是否支持展频的指示信息和展频频偏，确定是否打开各级retimer的展频，发送端会向接收端发送CTSB，在发送的CTSB中体现出确认结果。同时，发送端会根据最终确定的展频频偏计算SKP的插入频率。
建链成功/业务交互阶段：接收端接收到CTSB后，进入收发业务数据阶段。即完成 打开或不打开展频的协商后，进入正常业务交互阶段，并根据计算的插入频率周期性插入SKP。
在本申请实施例中，第一装置可以为SOC中的IO控制器，第二装置可以为以太网卡，第三装置可以为retimer。其中，第一装置可以称为发送端，第二装置可以称为接收端，第三装置可以称为中继装置，对此不做具体限定。
如图5所示，出示了本申请实施例提出的一种控制展频的方法500的示意性流程交互图。该方法适用于有线高速串行链路，能够获知有线高速串行链路中的装置的展频能力信息，从而可以确定并指示是否打开展频。
本申请实施例以有线高速串行链路包括第一装置和第二装置为例。该方法包括：
510，第二装置向第一装置发送第一训练码流块TSB，该第一TSB中包括该第二装置的第二展频能力信息，该第二展频的能力信息用于第一装置确定是否打开该第二装置的展频。
其中，打开展频包括时钟芯片或展频发生器使用低频时钟对参考时钟进行调制；不打开展频包括时钟芯片或展频发生器不对参考时钟进行调制。
可选的，第二展频能力信息包括第二装置是否支持展频的指示信息或第二装置支持的第二展频频偏中的至少一项。示例性地，第二展频能力信息可以仅包括第二装置是否支持展频的指示信息，例如，第二展频能力信息可以仅包括第二装置不支持展频的指示信息。第二展频能力信息可以仅包括第二装置支持的第二展频频偏；应理解，当第二展频能力信息中仅包括第二装置支持的第二展频频偏时，可以根据协议中规定的频偏阈值，确定该第二展频频偏是否大于或等于该频偏阈值；若该第二展频频偏大于或等于该频偏阈值，则确定第二装置支持展频；若该第二展频频偏小于该频偏阈值，则确定第二装置不支持展频。第二展频能力信息可以包括第二装置是否支持展频的指示信息和第二装置支持的第二展频频偏，应理解，当第二装置不支持展频时，第二展频能力信息中不包括第二装置支持的第二展频频偏。
520，第一装置接收第二装置发送的第一TSB。
530，第一装置向第二装置发送第二TSB，该第二TSB中包括第一指示信息，第一指示信息用于指示第二装置打开或不打开展频。
具体地，第一装置根据该第一装置的第一展频能力信息和第二装置的第二展频能力信息，确定是否打开第二装置的展频。若第一装置确定打开第二装置的展频，则第一指示信息用于指示第二装置打开展频；若第一装置确定不打开第二装置的展频，则第一指示信息用于指示第二装置不打开展频。可选的，第一展频能力信息包括第一装置是否支持展频的指示信息或第一装置支持的第一展频频偏中的至少一项。
示例性地，若第一展频能力信息指示第一装置支持展频、且第二展频能力信息指示第二装置支持展频，则第一装置确定打开第二装置的展频；否则，第一装置确定不打开第二装置的展频。也就是说，第一装置和第二装置都支持展频时，第一装置才确定打开第二装置的展频。应理解，当第一装置和第二装置都支持展频时，第一装置确定打开第二装置的展频时、也打开自己的展频，该情况下，第一装置可以先向第二装置发送第二TSB再打开自己的展频，第一装置也可以先打开自己的展频再向第二装置发送第二TSB，对此不做具体限定；当第一装置和第二装置中的任一装置不支持展频或第一装置和第二装置都不支 持展频时，第一装置确定不打开第二装置的展频、也不打开自己的展频。
可以理解为，若第一展频能力信息指示第一装置不支持展频、和/或、第二展频能力信息指示第二装置不支持展频，则该第一装置确定不打开第二装置的展频。也就是说，当第一装置和第二装置中的任一装置不支持展频时，该第一装置确定不打开第二装置的展频。
具体地，若第一装置确定打开第二装置的展频，则该第一装置根据第一装置支持的第一展频频偏和第二装置支持的第二展频频偏，确定第一目标展频频偏。例如，当第一展频频偏大于或等于第二展频频偏时，第一装置可以确定第一目标展频频偏等于第一展频频偏；当第一展频频偏小于第二展频频偏时，第一装置可以确定第一目标展频频偏等于第二展频频偏。该情况下，该第一装置向第二装置发送的第二TSB中的第一指示信息中可以携带该第一目标展频频偏，该第一指示信息用于指示第二装置根据第一目标展频频偏打开展频，对应地，第二装置可以根据该第一目标展频频偏确定插入SKP的频率。
若第一装置确定不打开第二装置的展频，该第一装置向第二装置发送的第二TSB中的第一指示信息不携带第一目标展频频偏，该第二TSB用于指示第二装置不打开展频。
540，第二装置接收第一装置发送的第二TSB，并根据第二TSB中的第一指示信息，打开或不打开自己的展频。若第一指示信息指示打开第二装置的展频，则第二装置打开自己的展频；若第一指示信息指示不打开第二装置的展频，则第二装置不打开自己的展频。
可选的，第二装置向第一装置发送第一TSB的同时，第一装置也可以向第二装置发送第三TSB，该第三TSB中包括该第一装置的第一展频能力信息。或者，第一装置先向第二装置发送第三TSB，第二装置接收到第一装置发送的第三TSB后，该第二装置向第一装置发送第一TSB，对此不做具体限定。
应理解，在第一装置也向第二装置发送了第一展频能力信息、且该第一展频能力信息中包括该第一装置支持的第一展频频偏的情况下，第一装置向第二装置发送的第二TSB中的第一指示信息可以不携带第一目标展频频偏，因为第二装置也可以根据第一装置支持的第一展频频偏和该第二装置支持的第二展频频偏，确定第一目标展频频偏；第一装置向第二装置发送的第二TSB中的第一指示信息也可以携带第一目标展频频偏。在第一装置没有向第二装置发送第一展频能力信息的情况下，第一装置向第二装置发送的第二TSB中的第一指示信息需要携带第一目标展频频偏。
在本申请实施例提供的技术方案中，第二装置可以向第一装置发送该第二装置的第二展频能力信息，第一装置接收第二装置发送的第二展频能力信息，即第一装置和第二装置之间可以交互展频能力信息；第一装置根据第二展频能力信息和第一装置的第一展频能力信息，可以确定是否打开第二装置展频和第一装置的展频；第一装置可以向第二装置发送第一指示信息，该第一指示信息用于指示第二装置打开或不打开展频。现有技术中软件开发人员只能根据装置的硬件互联形态等信息来预先知道有线高速串行链路中的装置是否支持展频，过程比较复杂；预先知道是否支持展频的相关信息后需要开发出控制展频开关的软件，由于不同产品中的硬件互联形态多样且对接的器件来自不同的厂商，导致软件开发的成本较高、维护工作量大。相比于根据装置的硬件互联形态来预先知道有线高速串行链路中的装置是否支持展频并开发出控制展频开关的软件，本方案中不同装置之间通过交互展频能力信息来确定并指示是否打开展频的方法更加便捷、高效。因此，本申请提供的 控制展频的方法能够获知有线高速串行链路中的装置的展频能力信息，从而可以确定并指示是否打开展频。
如图6所示，出示了本申请实施例提出的一种控制展频的方法600的示意性流程交互图。该方法适用于有线高速串行链路，能够通过交互获知有线高速串行链路中的装置的展频能力信息，并根据指示确定是否打开展频。
本申请实施例以有线高速串行链路包括第一装置、第二装置和第三装置为例。该方法包括：
610，第二装置通过第三装置向第一装置发送第一TSB，到达第一装置的第一TSB中包括第二装置的第二展频能力信息和第三装置的第三展频能力信息。第二展频能力信息包括第二装置是否支持展频的指示信息或第二装置支持的第二展频频偏中的至少一项；第三展频能力信息包括第三装置是否支持展频的指示信息或第三装置支持的第三展频频偏中的至少一项。
具体地，第二装置向第三装置发送第一TSB，该第一TSB中包括第二装置的第二展频能力信息。对应地，第三装置接收第二装置发送的第一TSB，第三装置更新该第一TSB，更新后的第一TSB中包括第二装置的第二展频能力信息和该第三装置的第三展频能力信息；也就是说，第三装置将自身是否支持展频的指示信息或支持的第三展频频偏中的至少一项添加到该第一TSB中。第三装置向第一装置发送该更新后的第一TSB。
其中，打开展频包括时钟芯片或展频发生器使用低频时钟对参考时钟进行调制；不打开展频包括时钟芯片或展频发生器不对参考时钟进行调制。
620，第一装置从第三装置接收第二装置发送的第一TSB，到达第一装置的第一TSB为第三装置更新后的第一TSB，也就是说，第一装置接收到的第一TSB中包括第二装置的第二展频能力信息和第三装置的第三展频能力信息。
630，第一装置通过第三装置向第二装置发送第二TSB，该第二TSB中包括第一指示信息和第二指示信息，第一指示信息用于指示第二装置打开或不打开展频，第二指示信息用于指示第三装置打开或不打开展频。
具体地，第一装置根据该第一装置的第一展频能力信息、第二装置的第二展频能力信息和第三装置的第三展频能力信息，确定是否打开第三装置的展频、以及是否打开第二装置的展频。若第一装置确定打开第三装置的展频，则第二指示信息用于指示第三装置的打开展频；若第一装置确定不打开第三装置的展频，则第二指示信息用于指示第三装置的不打开展频。若第一装置确定打开第二装置的展频，则第一指示信息用于指示第二装置打开展频；若第一装置确定不打开第二装置的展频，则第一指示信息用于指示第二装置不打开展频。可选的，第一展频能力信息包括第一装置是否支持展频的指示信息或第一装置支持的第一展频频偏中的至少一项。
示例性地，若第一展频能力信息指示第一装置支持展频、第二展频能力信息指示第二装置支持展频以及第三展频能力信息指示第三装置支持展频，则第一装置确定打开第三装置的展频、以及打开第二装置的展频。否则，第一装置确定不打开第三装置的展频、不打开第二装置的展频。应理解，当第一装置确定打开第三装置的展频时，第一装置也确定打开自己的展频；当第一装置确定不打开第三装置的展频时，第一装置也确定不打开自己的展频。
可以理解为，若第一展频能力信息指示第一装置不支持展频、和/或、第三展频能力信息指示第三装置不支持展频、和/或、第二展频能力信息指示第二装置不支持展频，则该第一装置确定不打开第二装置的展频。也就是说，当第一装置、第三装置和第二装置中的任一装置不支持展频时，该第一装置确定不打开第三装置的展频、不打开第二装置的展频。
可选的，若第一装置确定打开第三装置的展频、打开第二装置的展频，则该第一装置根据第一装置支持的第一展频频偏、第三装置支持的第三展频频偏和第二装置支持的第二展频频偏，确定第二目标展频频偏。例如，第二目标展频频偏等于第一展频频偏、第二展频频偏以及第三展频频偏中的最大的一个。该情况下，第二TSB中的第一指示信息和第二指示信息中都可以携带该第二目标展频频偏。该第一指示信息用于指示第二装置根据该第二目标展频频偏打开展频，第二指示信息用于指示第三装置根据该第二目标展频频偏打开展频。
若第一装置确定不打开第二装置的展频、以及不打开第三装置的展频，该第二TSB中的第一指示信息和第二指示信息都不携带第一目标展频频偏，该第二TSB用于指示第二装置不打开展频、以及第三装置不打开展频。
示例性地，若第一展频能力信息指示第一装置支持展频、第二展频能力信息指示第二装置不支持展频、第三展频能力信息指示第三装置支持展频，则第一装置确定打开第三装置的展频、不打开第二装置的展频；也就是说，第一装置确定打开第一装置与第三装置之间的展频、不打开第三装置与第二装置之间的展频。应理解，若第一装置确定打开第三装置的展频，则第一装置也确定打开自己的展频。该情况下，第二TSB中的第一指示信息用于指示第二装置不打开展频，第二TSB中的第二指示信息用于指示第三装置打开展频。可选的，第二指示信息中还可以携带第三目标展频频偏，该第二指示信息用于指示第三装置根据该第三目标展频频偏打开展频。其中，第三目标展频频偏可以等于第一展频频偏和第三展频频偏中的最大的一个。
示例性地，若第一展频能力信息指示第一装置不支持展频、第二展频能力信息指示第二装置支持展频、第三展频能力信息指示第三装置支持展频，则第一装置确定打开第三装置的展频、打开第二装置的展频，但是，第一装置确定不打开自己的展频。也就是说，第一装置确定打开第三装置与第二装置之间的展频、不打开第一装置与第三装置之间的展频。该情况下，第二TSB中的第一指示信息用于指示第二装置打开展频，第二TSB中的第二指示信息用于指示第三装置打开展频。可选的，第一指示信息和第二指示信息中还可以携带第四目标展频频偏，该第一指示信息用于指示第二装置根据该第四目标展频频偏打开展频，该第二指示信息用于指示第三装置根据该第四目标展频频偏打开展频。其中，第四目标展频频偏可以等于第二展频频偏和第三展频频偏中的最大的一个。
640，第二装置从第三装置接收第一装置发送的第二TSB，并根据第二TSB中的第一指示信息，打开或不打开自己的展频。若第一指示信息指示打开第二装置的展频，则第二装置打开自己的展频；若第一指示信息指示不打开第二装置的展频，则第二装置不打开自己的展频。
具体地，第三装置从第一装置接收第二TSB，将该第二TSB发送给第二装置，并根据第二TSB中的第二指示信息，打开或不打开自己的展频。若第二指示信息指示打开第 三装置的展频，则第三装置打开自己的展频；若第二指示信息指示不打开第三装置的展频，则第三装置不打开自己的展频。
可选的，第二装置通过第三装置向第一装置发送第一TSB的同时，第一装置也可以通过第三装置向第二装置发送第三TSB，到达第二装置的第三TSB中包括该第一装置的第一展频能力信息和第三装置的第三展频能力信息。或者，第一装置先通过第三装置向第二装置发送第三TSB，第二装置从第三装置接收到第三TSB后，该第二装置通过第三装置向第一装置发送第一TSB，对此不做具体限定。
具体地，第一装置通过第三装置向第二装置发送第三TSB，可以理解为，第一装置向第三装置发送第三TSB，该第三TSB中包括第一装置的第一展频能力信息。对应地，第三装置接收第一装置发送的第三TSB，第三装置更新该第三TSB，更新后的第三TSB中包括第一装置的第一展频能力信息和该第三装置的第三展频能力信息；也就是说，第三装置将自身是否支持展频的指示信息或支持的第三展频频偏中的至少一项添加到该第三TSB中。第三装置向第二装置发送该更新后的第三TSB。
在本申请实施例提供的技术方案中，第二装置通过第三装置向第一装置发送第一TSB，到达第一装置的第一TSB中包括第二装置的第二展频能力信息和第三装置的第三展频能力信息；第一装置根据第二展频能力信息、第三展频能力信息和第一装置的第一展频能力信息，可以确定是否打开第二装置展频、是否打开第三装置的展频以及是否打开第一装置的展频；第一装置通过第三装置向第二装置发送第二TSB，该第二TSB中包括第一指示信息和第二指示信息，该第一指示信息用于指示第二装置打开或不打开展频，该第二指示信息用于指示第三装置打开或不打开展频。因此，该方法能够通过交互获知有线高速串行链路中的装置的展频能力信息，并根据指示确定是否打开展频。
示例性地，第一TSB中包括第一类型指示字段、负载字段和循环冗余校验CRC校验字段。该第一类型指示字段用于指示该第一TSB为发现训练码流块；第一TSB中的负载字段用于承载展频能力信息，包括第二装置的第二展频能力信息；第一TSB中的CRC校验字段用于对第一TSB进行校验。
示例性地，第二TSB中包括第二类型指示字段、负载字段和循环冗余校验CRC校验字段。该第二类型指示字段用于指示该第二TSB为配置训练码流块；第二TSB中的负载字段用于承载指示打开或不打开展频的指示信息，包括指示第二装置打开或不打开展频的指示信息；第二TSB中的CRC校验字段用于对第二TSB进行校验。
示例性地，第三TSB中包括第一类型指示字段、负载字段和循环冗余校验CRC校验字段。该第一类型指示字段用于指示该第三TSB为发现训练码流块；第三TSB中的负载字段用于承载展频能力信息，包括第一装置的第一展频能力信息；第三TSB中的CRC校验字段用于对第三TSB进行校验。
第一TSB和第三TSB为DTSB，第二TSB为CTSB。示例性地，DTSB中的负载字段中的第一比特用于承载第一展频能力信息，该负载字段中的第二比特用于承载第二展频能力信息，该负载字段中的第三比特用于承载第三展频能力信息。示例性地，CTSB中的第一比特用于承载第一指示信息、负载字段中的第二比特用于承载第二指示信息。
应理解，本申请实施例中的第三装置可以为一个或多个，当第三装置为多个时，到达第一装置的第一TSB中包括多个第三装置的展频能力信息，到达第二装置的第三TSB中 也包括多个第三装置的展频能力信息。例如，第三装置可以为两个，包括retimer0和retimer1。
如图7所示，出示了本申请实施例提出的控制展频的方法的一种示例。以第一装置为SOC中的IO控制器、第二装置为以太网卡、第三装置为retimer为例。
步骤一：IO控制器通过retimer向以太网卡发送第三DTSB。
IO控制器向retimer发送的第三DTSB中包括该IO控制器支持的第一展频能力信息，例如“HSSC_PERD＝A”表示该IO控制器支持的第一展频频偏。
retimer接收并更新IO控制器发送的第三DTSB，在第三DTSB中添加该retimer支持的第三展频能力信息，例如“RT_SSC_PERD＝B”表示该retimer支持的第三展频频偏，“RT_COM_CLK＝0”和“RT_SSC_SP＝1”表示该retimer支持展频的指示信息。
retimer向以太网卡发送更新后的第三DTSB，更新后的第三DTSB中包括“HSSC_PERD＝A”、“RT_SSC_PERD＝B”、“RT_COM_CLK＝0”以及“RT_SSC_SP＝1”。
步骤二：以太网卡通过retimer向IO控制器发送第一DTSB。
以太网卡向retimer发送的第一DTSB中包括该以太网卡支持的第二展频能力信息，例如“DSSC_PERD＝C”表示该IO控制器支持的第二展频频偏，“DCOM_CLK＝0”和“DSSC_SP＝1”表示该以太网卡支持展频的指示信息。
retimer接收并更新以太网卡发送的第一DTSB，在第一DTSB中添加该retimer支持的第三展频能力信息，例如“RT_SSC_PERD＝B”表示该retimer支持的第三展频频偏，“RT_COM_CLK＝0”和“RT_SSC_SP＝1”表示该retimer支持展频的指示信息。
retimer向IO控制器发送更新后的第一DTSB，更新后的第一DTSB中包括“RT_SSC_PERD＝B”、“RT_COM_CLK＝0”、“RT_SSC_SP＝1”、“DSSC_PERD＝C”“DCOM_CLK＝0”以及“DSSC_SP＝1”。
步骤一和步骤二为展频能力信息交互阶段，即图4中所述的发现阶段。
步骤三：IO控制器确定打开retimer的展频以及打开以太网卡的展频，并通过retimer向以太网卡发送第二CTSB。示例性地，该第二CTSB中包括“RT_SSC_EN＝1”和“DSSC_EN＝1”的字段，“RT_SSC_EN＝1”用于指示retimer打开展频，“DSSC_EN＝1”用于指示以太网卡打开展频。
具体地，若IO控制器确定打开retimer的展频以及打开以太网卡的展频，则比较HSSC_PERD、DSSC_PERD和RT_SSC_PERD，选取最大值为目标展频频偏，并该频偏插入SKP。
retimer收到第二CTSB中的“RT_SSC_EN＝1”，则打开自己的展频；以太网卡收到第二CTSB中的“DSSC_EN＝1”，则打开自己的展频。
步骤三为打开或不打开展频的配置阶段，即图4中所述的配置阶段。
应理解，步骤一与步骤二可以是同时进行的，步骤一也可以在步骤二之前，对此不做限定。
步骤四：IO控制器通过retimer向以太网卡传输业务数据。步骤四为图4中所述的建链成功/业务交互阶段。
本申请实施例提出了一种通信装置，如图8所示，出示了本申请实施例的一种通信装置800的示意性框图。该装置可以是本申请方法实施例中的第一装置。该通信装置700包 括：
接收模块810，用于接收第二装置发送的第一训练码流块TSB，所述第一TSB中包括所述第二装置的第二展频能力信息；
发送模块820，用于向所述第二装置发送第二TSB，所述第二TSB中包括第一指示信息，所述第一指示信息用于指示所述第二装置打开或不打开展频。
可选的，所述装置800还包括控制模块830，用于根据第一展频能力信息和所述第二展频能力信息，确定是否打开所述第二装置的展频，其中，所述第一展频能力信息是所述装置的展频能力信息。
可选的，所述发送模块820还用于，向所述第二装置发送第三TSB，所述第三TSB中包括第一展频能力信息，所述第一展频能力信息是所述装置的展频能力信息。
可选的，所述第一展频能力信息包括所述装置是否支持展频的指示信息或所述装置支持的第一展频频偏中的至少一项；所述第二展频能力信息包括所述第二装置是否支持展频的指示信息或所述第二装置支持的第二展频频偏中的至少一项。
可选的，所述控制模块830具体用于：若所述第一展频能力信息指示所述装置支持展频，且所述第二展频能力信息指示所述第二装置支持展频，则确定打开所述第二装置的展频；否则，确定不打开所述第二装置的展频。
可选的，所述接收模块810具体用于，从第三装置接收所述第二装置发送的所述第一TSB，其中，所述第一TSB中还包括所述第三装置的第三展频能力信息；
所述发送模块820具体用于，通过所述第三装置向所述第二装置发送所述第二TSB，所述第二TSB中还包括第二指示信息，所述第二指示信息用于指示所述第三装置打开或不打开展频。
可选的，所述控制模块830还用于，根据所述第一展频能力信息、所述第二展频能力信息和所述第三展频能力信息，确定是否打开所述第三装置的展频、以及是否打开所述第二装置的展频。
可选的，所述发送模块820还用于，通过所述第三装置向所述第二装置发送所述第三TSB，到达所述第二装置的所述第三TSB中包括所述装置的所述第一展频能力信息和所述第三展频能力信息，所述第三展频能力信息包括所述第三装置是否支持展频的指示信息或所述第三装置支持的第三展频频偏中的至少一项。
可选的，所述控制模块830具体用于：若所述第一展频能力信息指示所述装置支持展频、所述第二展频能力信息指示所述第二装置支持展频以及所述第三展频能力信息指示所述第三装置支持展频，则确定打开所述第三装置的展频、打开所述第二装置的展频；若所述第一展频能力信息指示装置不支持展频、和/或、所述第二展频能力信息指示所述第二装置不支持展频、和/或、所述第三展频能力信息指示所述第三装置不支持展频，则确定不打开所述第三装置的展频、不打开所述第二装置的展频。
可选的，所述控制模块830具体用于：若所述第一展频能力信息指示所述装置支持展频、所述第二展频能力信息指示所述第二装置不支持展频、所述第三展频能力信息指示所述第三装置支持展频，则确定打开所述第三装置的展频、不打开所述第二装置的展频；若所述所述第一展频能力信息指示所述装置不支持展频、所述第二展频能力信息指示所述第二装置支持展频、所述第三展频能力信息指示所述第三装置支持展频，则确定打开所述第 三装置的展频、打开所述第二装置的展频。
可选的，所述TSB中包括类型指示字段、负载字段和循环冗余校验CRC校验字段，其中，所述类型指示字段用于指示所述TSB为发现训练码流块或者配置训练码流块，所述负载字段用于承载展频能力信息或指示打开或不打开展频的指示信息，所述CRC校验字段用于对所述TSB进行校验。
可选的，当所述TSB为发现训练码流块时，所述负载字段中的第一比特用于承载所述第一展频能力信息，所述负载字段中的第二比特用于承载所述第二展频能力信息，所述负载字段中的第三比特用于承载所述第三展频能力信息；当所述TSB为配置训练码流块时，所述负载字段中的第一比特用于承载所述第一指示信息、所述负载字段中的第二比特用于承载所述第二指示信息。
本申请实施例提出了一种通信装置，如图9所示，出示了本申请实施例的一种通信装置900的示意性框图。该装置可以是本申请方法实施例中的第二装置。该通信装置800包括：
发送模块910，用于向第一装置发送第一训练码流块TSB，所述第一TSB中包括所述装置的第二展频能力信息，所述第二展频能力信息用于所述第一装置确定是否打开所述装置的展频；
接收模块920，接收所述第一装置发送的第二TSB，所述第二TSB中包括第一指示信息，所述第一指示信息用于指示所述装置打开或不打开展频。
可选的，所述接收模块920还用于，接收所述第一装置发送的第三TSB，所述第三TSB中包括所述第一装置的第一展频能力信息。
可选的，所述第一展频能力信息包括所述第一装置是否支持展频的指示信息或所述第一装置支持的第一展频频偏中的至少一项；所述第二展频能力信息包括所述装置是否支持展频的指示信息或所述装置支持的第二展频频偏中的至少一项。
可选的，所述发送模块910具体用于，通过第三装置向所述第一装置发送所述第一TSB，到达所述第一装置的所述第一TSB中包括所述第二展频能力信息和所述第三装置的第三展频能力信息，所述第三展频能力信息包括所述第三装置是否支持展频的指示信息或所述第三装置支持的第三展频频偏中的至少一项；
所述接收模块920具体用于，从所述第三装置接收所述第一装置发送的所述第二TSB，所述第二TSB中还包括第二指示信息，所述第二指示信息用于指示所述第三装置打开或不打开展频。
可选的，所述接收模块920还用于，从所述第三装置接收所述第一装置发送的所述第三TSB，所述第三TSB中包括所述第一装置的第一展频能力信息和所述第三展频能力信息。
本申请实施例提出了一种通信装置，如图10所示，出示了本申请实施例的一种通信装置1000的示意性框图。该装置可以是本申请实施例中的第一装置，该装置可以为图2中的SOC中的IO控制器。该通信装置1000包括：
(1)数据链路层发送方向(data link layer transmitter，DL_TX)：负责向物理层接收方向(physical layer transmitter，PL_TX)发送有效的业务数据。
(2)数据分发模块：对前向差错编码(forward error correction，FEC)编码后的数据 进行分发，排布到各个物理通道(lane)上。
(3)GEN_TSB：产生TSB并发送给MUX。
(4)GEN_SKP：产生SKP并发送给MUX。
(5)SSC_CTRL：判断CHECK_TSB输出的展频能力信息，并控制GEN_TSB产生携带SSC控制信息的TSB，控制GEN_SKP按一定的频率周期性发送SKP；其中，SSC控制信息可以为上述第一指示信息和第二指示信息。
(6)SSC_CAP_CFG：实现了SSC配置相关的寄存器，包括SSC打开或不打开的配置，是否支持SSC的能力配置等。
(7)MUX：受SSC_CTRL控制，从输入的数据、TSB和SKP中选择一路信息，输出给加扰模块。
(8)加扰模块(scramber)：负责对发送的数据进行加扰。
(9)SerDes TX：负责把加扰模块输出的数据转换为串行码流发送到有线高速串行链路上。
(10)SerDes RX：负责从有线高速串行链路上接收串行数据，并进行串并转换，把并行数据发送给解扰模块。
(11)解扰模块(descramber)：负责对数据进行帧定界和解扰处理。
(12)CHECK_TSB：从接收到的数据中识别TSB码流，并解析TSB中承载的展频能力信息。
(13)消偏斜模块：对接收到的数据进行消除lane之间偏斜处理。
(14)物理层接收方向(data link layer receiver，DL_RX)：负责从物理层接收方向(physical layer receiver，PL_RX)接收数据。
本申请实施例中的通信装置800中的控制模块830包括GEN_TSB、SSC_CTRL、SSC_CAP_CFG和CHECK_TSB。
本申请实施例提供了一种通信设备1100，如图11所示，出示了本申请实施例的一种通信设备1100的示意性框图。
该通信设备1100包括：处理器1110、存储器1120和通信接口1130；
存储器1120用于存储可执行指令；
处理器1110通过通信接口1130与存储器1120耦合，处理器1110用于调用并运行所述存储器1120中的所述可执行指令，以实现本申请实施例中的方法。该通信设备中可以包括本申请实施例中的第一装置或第二装置。
上述的处理器1110可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程 只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可选的，本申请实施例还提供了一种通信设备，该通信设备包括输入输出接口和逻辑电路，该输入输出接口用于接收或输出信息；该逻辑电路，用于执行上述任一方法实施例中的方法。
本申请实施例还提供了一种计算机可读存储介质，其上存储有用于实现上述方法实施例中的方法的计算机程序。当该计算机程序在计算机或处理器上运行时，使得该计算机或所述处理器可以实现上述方法实施例中的方法。
本申请实施例还提供了一种计算机程序产品，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码在计算机上运行时，使得上述方法实施例中的方法被执行。
本申请实施例还提供了一种芯片，包括处理器，所述处理器与存储器相连，所述存储器用于存储计算机程序，所述处理器用于执行所述存储器中存储的计算机程序，以使得所述芯片执行上述方法实施例中的方法。
应理解，在本申请实施例中，编号“第一”、“第二”…仅仅为了区分不同的对象，比如为了区分不同的装置，并不对本申请实施例的范围构成限制，本申请实施例并不限于此。
另外，本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系；本申请中术语“至少一个”，可以表示“一个”和“两个或两个以上”，例如，A、B和C中，可以表示：单独存在A，单独存在B，单独存在C、同时存在A和B，同时存在A和C，同时存在C和B，同时存在A和B和C，这七种情况。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。本领域技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (40)

  1. 一种控制展频的方法，其特征在于，适用于有线高速串行链路，所述方法包括：
    第一装置接收第二装置发送的第一训练码流块TSB，所述第一TSB中包括所述第二装置的第二展频能力信息；
    所述第一装置向所述第二装置发送第二TSB，所述第二TSB中包括第一指示信息，所述第一指示信息用于指示所述第二装置打开或不打开展频。
  2. 根据权利要求1所述的方法，其特征在于，在所述第一装置向所述第二装置发送第二TSB之前，所述方法还包括：
    所述第一装置根据第一展频能力信息和所述第二展频能力信息，确定是否打开所述第二装置的展频，其中，所述第一展频能力信息是所述第一装置的展频能力信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述第一装置向所述第二装置发送第三TSB，所述第三TSB中包括第一展频能力信息，所述第一展频能力信息是所述第一装置的展频能力信息。
  4. 根据权利要求2或3所述的方法，其特征在于，
    所述第一展频能力信息包括所述第一装置是否支持展频的指示信息或所述第一装置支持的第一展频频偏中的至少一项；
    所述第二展频能力信息包括所述第二装置是否支持展频的指示信息或所述第二装置支持的第二展频频偏中的至少一项。
  5. 根据权利要求2至4中任一项所述的方法，其特征在于，所述第一装置根据第一展频能力信息和所述第二展频能力信息，确定是否打开所述第二装置的展频，包括：
    若所述第一展频能力信息指示所述第一装置支持展频，且所述第二展频能力信息指示所述第二装置支持展频，则所述第一装置确定打开所述第二装置的展频；
    否则，所述第一装置确定不打开所述第二装置的展频。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，
    所述第一装置接收第二装置发送的第一训练码流块TSB，包括：
    所述第一装置从第三装置接收所述第二装置发送的所述第一TSB，其中，所述第一TSB中还包括所述第三装置的第三展频能力信息；
    所述第一装置向所述第二装置发送第二TSB，包括：
    所述第一装置通过所述第三装置向所述第二装置发送所述第二TSB，所述第二TSB中还包括第二指示信息，所述第二指示信息用于指示所述第三装置打开或不打开展频。
  7. 根据权利要求6所述的方法，其特征在于，在所述第一装置通过所述第三装置向所述第二装置发送所述第二TSB之前，所述方法还包括：
    所述第一装置根据所述第一展频能力信息、所述第二展频能力信息和所述第三展频能力信息，确定是否打开所述第三装置的展频、以及是否打开所述第二装置的展频。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    所述第一装置通过所述第三装置向所述第二装置发送所述第三TSB，到达所述第二装置的所述第三TSB中包括所述第一装置的所述第一展频能力信息和所述第三展频能力信息，所述第三展频能力信息包括所述第三装置是否支持展频的指示信息或所述第三装置支持的第三展频频偏中的至少一项。
  9. 根据权利要求7或8所述的方法，其特征在于，所述第一装置根据第一展频能力信息、所述第二展频能力信息和所述第三展频能力信息，确定是否打开所述第三装置的展频、以及是否打开所述第二装置的展频，包括：
    若所述第一展频能力信息指示所述第一装置支持展频、所述第二展频能力信息指示所述第二装置支持展频以及所述第三展频能力信息指示所述第三装置支持展频，则所述第一装置确定打开所述第三装置的展频、打开所述第二装置的展频；
    若所述第一展频能力信息指示第一装置不支持展频、和/或、所述第二展频能力信息指示所述第二装置不支持展频、和/或、所述第三展频能力信息指示所述第三装置不支持展频，则所述第一装置确定不打开所述第三装置的展频、不打开所述第二装置的展频。
  10. 根据权利要求7或8所述的方法，其特征在于，所述第一装置根据所述第一展频能力信息、所述第二展频能力信息和所述第三展频能力信息，确定是否打开所述第三装置的展频、以及是否打开所述第二装置的展频，包括：
    若所述第一展频能力信息指示所述第一装置支持展频、所述第二展频能力信息指示所述第二装置不支持展频、所述第三展频能力信息指示所述第三装置支持展频，则所述第一装置确定打开所述第三装置的展频、不打开所述第二装置的展频；
    若所述所述第一展频能力信息指示所述第一装置不支持展频、所述第二展频能力信息指示所述第二装置支持展频、所述第三展频能力信息指示所述第三装置支持展频，则所述第一装置确定打开所述第三装置的展频、打开所述第二装置的展频。
  11. 根据权利要求1至10中任一项所述的方法，其特征在于，
    所述TSB中包括类型指示字段、负载字段和循环冗余校验CRC校验字段，其中，所述类型指示字段用于指示所述TSB为发现训练码流块或者配置训练码流块，所述负载字段用于承载展频能力信息或指示打开或不打开展频的指示信息，所述CRC校验字段用于对所述TSB进行校验。
  12. 根据权利要求11所述的方法，其特征在于，
    当所述TSB为发现训练码流块时，所述负载字段中的第一比特用于承载所述第一展频能力信息，所述负载字段中的第二比特用于承载所述第二展频能力信息，所述负载字段中的第三比特用于承载所述第三展频能力信息；
    当所述TSB为配置训练码流块时，所述负载字段中的第一比特用于承载所述第一指示信息、所述负载字段中的第二比特用于承载所述第二指示信息。
  13. 根据权利要求1至12中任一项所述的方法，其特征在于，
    所述打开展频包括时钟芯片或展频发生器使用低频时钟对参考时钟进行调制；
    所述不打开展频包括时钟芯片或展频发生器不对所述参考时钟进行调制。
  14. 一种控制展频的方法，其特征在于，适用于有线高速串行链路，所述方法包括：
    第二装置向第一装置发送第一训练码流块TSB，所述第一TSB中包括所述第二装置的第二展频能力信息，所述第二展频能力信息用于所述第一装置确定是否打开所述第二装置的展频；
    所述第二装置接收所述第一装置发送的第二TSB，所述第二TSB中包括第一指示信息，所述第一指示信息用于指示所述第二装置打开或不打开展频。
  15. 根据权利要求14所述的方法，其特征在于，所方法还包括：
    所述第二装置接收所述第一装置发送的第三TSB，所述第三TSB中包括所述第一装置的第一展频能力信息。
  16. 根据权利要求15所述的方法，其特征在于，
    所述第一展频能力信息包括所述第一装置是否支持展频的指示信息或所述第一装置支持的第一展频频偏中的至少一项；
    所述第二展频能力信息包括所述第二装置是否支持展频的指示信息或所述第二装置支持的第二展频频偏中的至少一项。
  17. 根据权利要求14至16中任一项所述的方法，其特征在于，
    所述第二装置向第一装置发送第一训练码流块TSB，包括：
    所述第二装置通过第三装置向所述第一装置发送所述第一TSB，到达所述第一装置的所述第一TSB中包括所述第二展频能力信息和所述第三装置的第三展频能力信息，所述第三展频能力信息包括所述第三装置是否支持展频的指示信息或所述第三装置支持的第三展频频偏中的至少一项；
    所述第二装置接收所述第一装置发送的第二TSB，包括：
    所述第二装置从所述第三装置接收所述第一装置发送的所述第二TSB，所述第二TSB中还包括第二指示信息，所述第二指示信息用于指示所述第三装置打开或不打开展频。
  18. 根据权利要求17所述的方法，其特征在于，所述方法还包括：
    所述第二装置从所述第三装置接收所述第一装置发送的所述第三TSB，所述第三TSB中包括所述第一装置的第一展频能力信息和所述第三展频能力信息。
  19. 根据权利要求14至18中任一项所述的方法，其特征在于，
    所述打开展频包括时钟芯片或展频发生器使用低频时钟对参考时钟进行调制；
    所述不打开展频包括时钟芯片或展频发生器不对所述参考时钟进行调制。
  20. 一种通信装置，其特征在于，包括：
    接收模块，用于接收第二装置发送的第一训练码流块TSB，所述第一TSB中包括所述第二装置的第二展频能力信息；
    发送模块，用于向所述第二装置发送第二TSB，所述第二TSB中包括第一指示信息，所述第一指示信息用于指示所述第二装置打开或不打开展频。
  21. 根据权利要求20所述的装置，其特征在于，
    所述装置还包括控制模块，用于根据第一展频能力信息和所述第二展频能力信息，确定是否打开所述第二装置的展频，其中，所述第一展频能力信息是所述装置的展频能力信息。
  22. 根据权利要求20或21所述的装置，其特征在于，
    所述发送模块还用于，向所述第二装置发送第三TSB，所述第三TSB中包括第一展频能力信息，所述第一展频能力信息是所述装置的展频能力信息。
  23. 根据权利要求21或22所述的装置，其特征在于，
    所述第一展频能力信息包括所述装置是否支持展频的指示信息或所述装置支持的第一展频频偏中的至少一项；
    所述第二展频能力信息包括所述第二装置是否支持展频的指示信息或所述第二装置支持的第二展频频偏中的至少一项。
  24. 根据权利要求21至23中任一项所述的装置，其特征在于，所述控制模块具体用于：
    若所述第一展频能力信息指示所述装置支持展频，且所述第二展频能力信息指示所述第二装置支持展频，则确定打开所述第二装置的展频；
    否则，确定不打开所述第二装置的展频。
  25. 根据权利要求20至24中任一项所述的装置，其特征在于，
    所述接收模块具体用于，从第三装置接收所述第二装置发送的所述第一TSB，其中，所述第一TSB中还包括所述第三装置的第三展频能力信息；
    所述发送模块具体用于，通过所述第三装置向所述第二装置发送所述第二TSB，所述第二TSB中还包括第二指示信息，所述第二指示信息用于指示所述第三装置打开或不打开展频。
  26. 根据权利要求25所述的装置，其特征在于，
    所述控制模块还用于，根据所述第一展频能力信息、所述第二展频能力信息和所述第三展频能力信息，确定是否打开所述第三装置的展频、以及是否打开所述第二装置的展频。
  27. 根据权利要求26所述的装置，其特征在于，
    所述发送模块还用于，通过所述第三装置向所述第二装置发送所述第三TSB，到达所述第二装置的所述第三TSB中包括所述装置的所述第一展频能力信息和所述第三展频能力信息，所述第三展频能力信息包括所述第三装置是否支持展频的指示信息或所述第三装置支持的第三展频频偏中的至少一项。
  28. 根据权利要求26或27所述的装置，其特征在于，所述控制模块具体用于：
    若所述第一展频能力信息指示所述装置支持展频、所述第二展频能力信息指示所述第二装置支持展频以及所述第三展频能力信息指示所述第三装置支持展频，则确定打开所述第三装置的展频、打开所述第二装置的展频；
    若所述第一展频能力信息指示装置不支持展频、和/或、所述第二展频能力信息指示所述第二装置不支持展频、和/或、所述第三展频能力信息指示所述第三装置不支持展频，则确定不打开所述第三装置的展频、不打开所述第二装置的展频。
  29. 根据权利要求26或27所述的装置，其特征在于，所述控制模块具体用于：
    若所述第一展频能力信息指示所述装置支持展频、所述第二展频能力信息指示所述第二装置不支持展频、所述第三展频能力信息指示所述第三装置支持展频，则确定打开所述第三装置的展频、不打开所述第二装置的展频；
    若所述所述第一展频能力信息指示所述装置不支持展频、所述第二展频能力信息指示所述第二装置支持展频、所述第三展频能力信息指示所述第三装置支持展频，则确定打开所述第三装置的展频、打开所述第二装置的展频。
  30. 根据权利要求20至29中任一项所述的装置，其特征在于，
    所述TSB中包括类型指示字段、负载字段和循环冗余校验CRC校验字段，其中，所述类型指示字段用于指示所述TSB为发现训练码流块或者配置训练码流块，所述负载字段用于承载展频能力信息或指示打开或不打开展频的指示信息，所述CRC校验字段用于对所述TSB进行校验。
  31. 根据权利要求30所述的装置，其特征在于，
    当所述TSB为发现训练码流块时，所述负载字段中的第一比特用于承载所述第一展频能力信息，所述负载字段中的第二比特用于承载所述第二展频能力信息，所述负载字段中的第三比特用于承载所述第三展频能力信息；
    当所述TSB为配置训练码流块时，所述负载字段中的第一比特用于承载所述第一指示信息、所述负载字段中的第二比特用于承载所述第二指示信息。
  32. 一种通信装置，其特征在于，包括：
    发送模块，用于向第一装置发送第一训练码流块TSB，所述第一TSB中包括所述装置的第二展频能力信息，所述第二展频能力信息用于所述第一装置确定是否打开所述装置的展频；
    接收模块，接收所述第一装置发送的第二TSB，所述第二TSB中包括第一指示信息，所述第一指示信息用于指示所述装置打开或不打开展频。
  33. 根据权利要求32所述的装置，其特征在于，
    所述接收模块还用于，接收所述第一装置发送的第三TSB，所述第三TSB中包括所述第一装置的第一展频能力信息。
  34. 根据权利要求33所述的装置，其特征在于，
    所述第一展频能力信息包括所述第一装置是否支持展频的指示信息或所述第一装置支持的第一展频频偏中的至少一项；
    所述第二展频能力信息包括所述装置是否支持展频的指示信息或所述装置支持的第二展频频偏中的至少一项。
  35. 根据权利要求32至34中任一项所述的装置，其特征在于，
    所述发送模块具体用于，通过第三装置向所述第一装置发送所述第一TSB，到达所述第一装置的所述第一TSB中包括所述第二展频能力信息和所述第三装置的第三展频能力信息，所述第三展频能力信息包括所述第三装置是否支持展频的指示信息或所述第三装置支持的第三展频频偏中的至少一项；
    所述接收模块具体用于，从所述第三装置接收所述第一装置发送的所述第二TSB，所述第二TSB中还包括第二指示信息，所述第二指示信息用于指示所述第三装置打开或不打开展频。
  36. 根据权利要求35所述的装置，其特征在于，
    所述接收模块还用于，从所述第三装置接收所述第一装置发送的所述第三TSB，所述第三TSB中包括所述第一装置的第一展频能力信息和所述第三展频能力信息。
  37. 一种通信设备，其特征在于，包括：处理器和存储器，所述存储器用于存储计算机程序，所述处理器用于执行所述存储器中存储的计算机程序，以使得所述通信设备执行如权利要求1至19中任一项所述的方法。
  38. 一种通信设备，其特征在于，包括：输入输出接口和逻辑电路；
    所述输入输出接口，用于接收或输出信息；
    所述逻辑电路用于执行权利要求1至19中任一项所述的方法。
  39. 一种计算机可读存储介质，其特征在于，包括：
    所述计算机可读介质存储有计算机程序；
    所述计算机程序在计算机或处理器上运行时，使得所述计算机或所述处理器执行权利 要求1至19中任一项所述的方法。
  40. 一种计算机程序产品，其特征在于，包括计算机程序，当所述计算机程序被执行时，使得如权利要求1至19任一项所述的方法被实现。
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