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WO2017166230A1 - Procédé de traitement de bande de fréquences, distributeur et système - Google Patents

Procédé de traitement de bande de fréquences, distributeur et système Download PDF

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Publication number
WO2017166230A1
WO2017166230A1 PCT/CN2016/078190 CN2016078190W WO2017166230A1 WO 2017166230 A1 WO2017166230 A1 WO 2017166230A1 CN 2016078190 W CN2016078190 W CN 2016078190W WO 2017166230 A1 WO2017166230 A1 WO 2017166230A1
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WO
WIPO (PCT)
Prior art keywords
signal
distributor
frequency band
head end
end device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/078190
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English (en)
Chinese (zh)
Inventor
司小书
张利
欧阳涛
张小龙
莫德·卡尔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201680066733.2A priority Critical patent/CN108352898B/zh
Priority to PCT/CN2016/078190 priority patent/WO2017166230A1/fr
Publication of WO2017166230A1 publication Critical patent/WO2017166230A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission

Definitions

  • the present invention relates to communication technologies, and in particular, to a frequency band processing method, a distributor, and a system.
  • FIG. 1 is a schematic diagram of a cable structure of a cable network based on a cable television network.
  • the tree structure mainly includes: a head end device, a distributor, a brancher, and a terminal device, wherein the trunk cable runs through the entire The network generates a lot of feeder cables along the road, and each branch connects multiple terminal devices.
  • uplink and downlink use Frequency Division Duplexing (FDD) mode communication
  • Figure 2 is a schematic diagram of band allocation in a cable television network specified in the DOCSIS 3.1 standard, as shown in Figure 2, in the cable
  • the frequency band occupied by uplink communication in the television network is 5M-204MHz
  • the frequency band occupied by downlink communication is 258MHz-1.218GHz.
  • the uplink is communicated in the aggregation mode, and all the terminal devices on the network share the uplink bandwidth in the frequency domain.
  • the frequency band occupied by the uplink communication is narrow, so that the uplink communication efficiency is low.
  • the embodiments of the present invention provide a frequency band processing method, a distributor, and a system, which overcome the problem that the frequency band occupied by the uplink communication is narrow in the prior art, thereby making the uplink communication efficiency low.
  • a first aspect of the present invention provides a frequency band processing method, including:
  • the distributor receives the uplink signal sent by the at least one brancher connected to the distributor, and each uplink signal is located in a different frequency band; then the distributor aggregates the plurality of uplink signals to obtain a convergence signal; and then the distributor performs the convergence signal The frequency band is shifted so that the frequency band of the convergence signal after the frequency band is moved is within the range of the uplink frequency band of the distributor; finally, the distributor sends the first signal including the convergence signal after the frequency band is moved to the head end device.
  • the distributor can move the frequency band of the received signal, the signal in the low frequency band can be moved to the high frequency band, thereby widening the frequency of the uplink communication. Band, which in turn increases the rate of upstream communication.
  • the first signal further includes a signal transmitted by a distributor adjacent to the dispenser.
  • the method further includes: first acquiring the distributor and the distributor A signal transmitted by an adjacently connected distributor; the distributor then aggregates the received signal transmitted by the distributor connected to the distributor and the convergence signal after the frequency band is shifted to obtain the first signal.
  • the dispenser acquires a signal transmitted by the dispenser adjacent to the dispenser comprising: the dispenser receiving the original signal transmitted by the dispenser connected adjacent to the dispenser; the dispenser extracting from the original signal A signal on an upstream frequency band corresponding to a distributor connected adjacent to the distributor to obtain a signal transmitted by a distributor connected adjacent to the distributor.
  • the frequency band occupied by the signal of the head end device is widened compared with the prior art, and the entire frequency band can be occupied, thereby effectively increasing the rate of uplink communication.
  • the distributor sends the first signal to the head end device, and the distributor further receives the downlink signal, wherein the downlink signal is a signal sent by the head end device to the distributor and sent to the header by the distributor.
  • the first signal related interference signal of the end device the distributor extracts, according to the first signal, the signal sent by the head end device to the distributor from the downlink signal.
  • the frequency band of the aggregated signal received by the distributor can be moved to another frequency band range, thereby improving the coverage of the uplink frequency band, thereby effectively increasing the rate of uplink communication.
  • the method further includes: the distributor extracts a signal with a frequency in the downlink frequency band from the signal sent by the head end device to the distributor, and the downlink frequency band a frequency band for the distributor to communicate with at least one of the splitters connected to the splitter; the dispatcher transmits the extracted frequency signal on the downstream frequency band to at least one of the splitters connected to the splitter.
  • the interference signal is generated when the uplink frequency band and the downlink frequency band of the distributor and the same device have the same frequency band, but the distributor can reject the interference signal from the received signal, so that the distributor has the same
  • the upstream and downstream bands of the device for communication can be used.
  • the same frequency band can widen the frequency band of the uplink communication, thereby increasing the rate of uplink communication.
  • the upstream frequency band in which the distributor communicates with the same device has the same frequency band as the downstream frequency band.
  • the uplink frequency band and the downlink frequency band can use the same frequency band, the frequency band of the uplink communication can be broadened, thereby improving the rate of the uplink communication.
  • a second aspect of the invention provides a dispenser comprising:
  • a receiver configured to receive an uplink signal sent by at least one splitter connected to the splitter, where each uplink signal is located in a different frequency band; a processor, configured to aggregate multiple uplink signals to obtain a convergence signal, and is used for convergence The signal is shifted in a frequency band such that the frequency band of the convergence signal after the frequency band is shifted is within the range of the uplink frequency band of the distributor; and the transmitter is configured to send the first signal including the convergence signal after the frequency band is moved to the head end device.
  • the receiver is further configured to: before the transmitter sends the first signal to the head end device, acquire a signal sent by the distributor connected to the distributor; the processor is further configured to receive The signal sent by the distributor connected to the distributor is aggregated with the convergence signal after the frequency band is moved to obtain the first signal.
  • the receiver is further configured to: when the transmitter sends the first signal to the head end device, receive the downlink signal, where the downlink signal is a signal sent by the head end device to the distributor and the interference signal.
  • the mixed signal is related to the first signal sent by the distributor to the head end device; the processor is further configured to extract, according to the first signal, the signal sent by the head end device to the distributor from the downlink signal.
  • the processor is further configured to: after extracting the signal sent by the head end device to the distributor, extract a signal with a frequency in a downlink frequency band from a signal sent by the head end device to the distributor, and a downlink frequency band And a frequency band in which the distributor communicates with the at least one splitter connected to the splitter; the transmitter is further configured to send the signal of the extracted frequency on the downlink frequency band to the at least one splitter connected to the splitter.
  • a third aspect of the invention provides a dispenser comprising:
  • a receiving module configured to receive an uplink signal sent by at least one branch device connected to the distributor, where each uplink signal is located in a different frequency band; a convergence module, configured to aggregate multiple uplink signals to obtain a convergence signal; and a frequency band shifting module Performing frequency band shifting on the convergence signal such that the frequency band of the convergence signal after the frequency band is moved is within the range of the uplink frequency band of the distributor; the transmitting module is configured to include The first signal of the convergence signal after the frequency band shift is sent to the head end device.
  • the receiving module is further configured to: before the sending module sends the first signal to the head end device, acquire a signal sent by the distributor connected to the distributor; the convergence module is further configured to receive The signal sent by the distributor connected to the distributor is aggregated with the convergence signal after the frequency band is moved to obtain the first signal.
  • the receiving module is further configured to: when the sending module sends the first signal to the head end device, receive the downlink signal, where the downlink signal is a signal sent by the head end device to the allocator and the interference signal.
  • the mixed signal is related to the first signal sent by the distributor to the head end device; and the signal sent by the head end device to the distributor is extracted from the downlink signal according to the first signal.
  • the receiving module is further configured to: after extracting the signal sent by the head end device to the distributor, extract a signal with a frequency in a downlink frequency band from a signal sent by the head end device to the distributor, where the downlink frequency band is a frequency band in which the distributor communicates with at least one of the splitters connected to the splitter; the transmitting module is further configured to send the signal of the extracted frequency on the downlink frequency band to the at least one splitter connected to the splitter.
  • a fourth aspect of the present invention provides a frequency band processing system, comprising: a head end device, a plurality of the distributors according to any one of the foregoing third aspects, a plurality of branches, and a plurality of terminal devices; Connected, the headend device is connected to the first splitter, and each splitter is connected to at least one splitter; each splitter is connected to at least one terminal device.
  • the distributor receives the uplink signal sent by the at least one splitter connected to the distributor, and each uplink signal is located in a different frequency band; then the distributor aggregates the multiple uplink signals to obtain a convergence signal; The convergence signal performs frequency band shifting so that the frequency band of the convergence signal after the frequency band shift is within the range of the uplink frequency band of the splitter; finally, the distributor sends the first signal including the aggregated signal after the frequency band shift to the head end device.
  • the distributor can move the frequency band of the received signal, the signal in the low frequency band can be moved to the high frequency band, thereby widening the frequency band of the uplink communication, thereby improving the rate of the uplink communication.
  • FIG. 1 is a schematic diagram showing a tree structure of a cable of an existing cable television network
  • FIG. 2 is a view showing a frequency band allocation corresponding to the structural diagram shown in FIG. 1;
  • FIG. 3 shows an uplink aggregation mode in the prior art
  • FIG. 4 is a flowchart of a method for processing a frequency band according to an embodiment of the present invention.
  • FIG. 5 shows a specific implementation method of the method of the present invention applied to an HFC network
  • FIG. 6 is a schematic structural view of a dispenser according to Embodiment 1 of the present invention.
  • FIG. 7 is a schematic structural view of a dispenser according to Embodiment 2 of the present invention.
  • Figure 3 shows the uplink aggregation mode in the prior art.
  • the distributor 1 the distributor 2, the distributor 3, and each distributor is connected to a brancher.
  • Each branch device is connected to a plurality of terminal devices.
  • the total uplink frequency band 5 MHz-204 MHz is divided into three parts, and the frequency band of the uplink communication corresponding to the branch cable where the distributor 1 is located is 5 MHz-65 MHz. 2
  • the frequency band of the uplink communication corresponding to the branch cable is 65MHz-130MHz, and the frequency band of the uplink communication corresponding to the branch cable where the distributor 3 is located is 130MHz-204MHz.
  • the distributor 3 receives the uplink signal carried on the 130 MHz-204 MHz frequency band sent by the branch device connected to the distributor 3, and transmits the uplink signal carried on the 130 MHz-204 MHz frequency band to the distributor 2, and the distributor 2 receives the uplink signal.
  • the uplink signal sent by the distributor 3 is aggregated with the uplink signal carried by the 65MHz-130MHz frequency band sent by the splitter connected to the distributor 2, and the uplink signal carried in the 65MHz-204MHz frequency band is obtained, and Sending the uplink signal carried on the 65MHz-204MHz frequency band to the distributor 1, the distributor 1 transmits the received uplink signal of the distributor 2 and the 5MHz-65MHz transmitted by the splitter connected to the distributor 1 received by the distributor 1
  • the uplink signals carried in the frequency band are aggregated to obtain an uplink signal carried in the 5MHz-204MHz frequency band, and the distributor 1 transmits the uplink signal carried in the 5MHz-204MHz frequency band to the head end device, because the frequency band used by the entire system for uplink communication is specified in the standard.
  • the frequency band used for the line communication is allocated to each branch line in the system, so that the frequency band of the uplink communication obtained by each branch line is narrow, resulting in a lower rate of uplink communication, wherein the distributor receives the connection with the distributor.
  • the uplink aggregation signal sent by the branch device is a signal obtained by the brancher receiving the uplink signal sent by each terminal device connected to the branch device.
  • the same-frequency duplex technology can be adopted. If the same-frequency duplex technology is adopted according to the architecture in the prior art, the signal transmitted by other devices received by the distributor may be sent to other devices by the distributor. The signal corresponds to the interference signal, but since the distributor in the prior art cannot know the signal sent by the distributor to other devices, the prior art distributor in the architecture cannot obtain the original device to be sent to the distributor. signal.
  • the invention adopts a signal processing capability distributor to make a point-to-point communication between the head end device and the distributor, or between the distributor and the distributor, and adopts the same frequency duplex technology (Co-frequency Co).
  • -time Full Duplex abbreviated as: CCFD
  • Point-to-point communication is suitable for the same-frequency duplex technology, because any device can directly obtain its own transmission signal when receiving signals, thus facilitating the same-frequency cancellation processing, obtaining and receiving The original signal), so that even if the signal sent by the other device received by the distributor has an interference signal related to the signal sent by the distributor to other devices, the distributor can extract the signal sent by the other device to the distributor, thereby
  • the uplink communication and the downlink communication can be used to use overlapping frequency bands, thereby increasing the frequency band used for uplink communication to improve the uplink communication rate.
  • FIG. 4 is a flowchart of a method for processing a frequency band according to an embodiment of the present invention. As shown in FIG. 4, the method in this embodiment may include:
  • Step 101 The distributor receives an uplink signal sent by at least one brancher connected to the distributor, and each uplink signal is located in a different frequency band.
  • the distributor and the at least one splitter connected to the splitter are in point-to-multipoint communication, and the present invention does not uplink the communication band and down between the splitter and at least one splitter connected to the splitter.
  • the communication band is limited, and a specific frequency band can be configured according to specific needs.
  • the communication between the distributor and at least one brancher connected to the distributor can adopt the communication method originally prescribed by DOCSIS 3.1, That is, the uplink communication and the downlink communication between the distributor and the at least one branch device connected to the distributor adopt the FDD method, for example, the frequency band occupied by the downlink communication is 258 MHz to 1.2 GHz, and the frequency band occupied by the uplink communication is 5 MHz to 204 MHz, so that the current communication can be maintained. With the DOCSIS 3.1 protocol unchanged, the original device can continue to be used.
  • Step 102 The distributor aggregates the plurality of uplink signals to obtain a convergence signal.
  • the splitter only receives the uplink signal sent by the splitter connected to the splitter, and receives the uplink signal.
  • the uplink signal is equivalent to the above-mentioned convergence signal.
  • Step 103 The distributor performs frequency band shifting on the convergence signal, so that the frequency band of the convergence signal after the frequency band is moved is within the range of the uplink frequency band of the distributor.
  • Step 104 The distributor sends the first signal to the head end device, and the first signal includes the convergence signal after the frequency band is moved.
  • An embodiment of the present invention provides a frequency band processing method, including: a distributor receiving an uplink signal sent by at least one branch device connected to a distributor, each uplink signal being located in a different frequency band; and then the distributor is configured to aggregate multiple uplink signals. Converging the signal; and then the distributor shifts the convergence signal to the frequency band so that the frequency band of the convergence signal after the frequency band is moved is within the range of the uplink frequency band of the distributor; finally, the distributor sends the first signal of the convergence signal including the frequency band after the transmission To the head end device. Wherein, since the distributor can move the frequency band of the received signal, the signal in the low frequency band can be moved to the high frequency band, thereby widening the frequency band of the uplink communication, thereby improving the rate of the uplink communication.
  • the first signal further includes: a signal sent by the distributor connected to the distributor, and the identifier sends the first signal to the head.
  • the method further includes: acquiring a signal sent by the distributor connected to the distributor, and then performing the signal transmitted by the distributor connected to the distributor and the convergence signal after the frequency band processed by the receiver Converging to obtain the first signal sent to the headend device as described above.
  • the combination of the signal sent by the distributor adjacent to the distributor in the first signal and the convergence signal after the frequency band is moved is not limited to the above-mentioned convergence mode, and other combinations are also applicable, and the present invention does not Limit it.
  • the frequency band occupied by the signal that finally reaches the head end device can be widened compared with the prior art, and even the entire frequency band can be occupied, thereby effectively improving the uplink communication. s speed.
  • the frequency band of the signal transmitted by the distributor connected to the distributor and the upstream frequency band corresponding to the distributor connected to the distributor are the same, and the acquisition and the dispenser are performed at the distributor.
  • the steps of the signal sent by the neighboring connected distributor specifically include:
  • the dispenser receives an original signal transmitted by a distributor connected adjacent to the distributor;
  • the allocator determines whether the frequency band of the original signal and the uplink frequency band corresponding to the distributor connected to the distributor are the same,
  • the distributor directly performs the step of acquiring the first signal
  • the distributor needs to extract the frequency from the original signal on the uplink frequency band corresponding to the distributor adjacent to the distributor. And a signal to obtain a signal sent by the distributor connected to the distributor, and the distributor performs the step of acquiring the first signal according to the acquired signal sent by the distributor connected to the distributor.
  • the distributor connected to the distributor can carry the useful data signal in the frequency band of 500 MHz-1200 MHz, and in the frequency band of 5 MHz-500 MHz, it can carry some information related to the distributor connected adjacent to the distributor.
  • the frequency of the uplink communication bearer corresponding to the distributor, etc.; or the redundant information can be carried in the frequency band of 5 MHz-500 MHz to enhance the line anti-noise capability, and the present invention does not support the information carried in the frequency band of 5 MHz-500 MHz mentioned above. Limited.
  • the entire frequency band (for example, 5 MHz - 1.2 GHz) can be used, and other than the upper frequency band corresponding to the distributor adjacent to the distributor in the entire frequency band. Redundant information can be carried in the frequency band, so that the line noise immunity can be enhanced.
  • a specific implementation manner of the foregoing step 103 is:
  • the distributor determines whether the frequency band of the convergence signal is within the range of the uplink frequency band of the distributor,
  • the distributor shifts the aggregated signal so that the frequency band of the aggregated signal after the frequency band shift is within the range of the upstream frequency band of the splitter.
  • the uplink frequency band of the distributor is 1001 MHz to 1200 MHz, and if the frequency band corresponding to the convergence signal is also 1001 MHz to 1200 MHz, the distributor directly sends the convergence signal to the head end device; if the frequency band corresponding to the convergence signal is 5 MHz-204 MHz, the allocation is performed.
  • the device performs band shift processing on the convergence signal, and shifts the frequency band corresponding to the convergence signal to a frequency band of 1001 MHz to 1200 MHz, and the distributor transmits the convergence signal in the frequency band of 1001 MHz to 1200 MHz after the frequency band shift to the head end device.
  • the frequency band of the aggregated signal received by the distributor can be moved to other frequency band ranges, thereby improving the coverage of the uplink frequency band, thereby effectively increasing the rate of uplink communication.
  • the distributor can move the signal
  • the total uplink frequency band of the trunk line in the prior art can be expanded to 5 MHz-404 MHz
  • the uplink frequency band corresponding to the distributor 1 is 5 MHz- 204MHz
  • the corresponding uplink frequency band of the distributor 2 is 204MHz-404MHz.
  • the splitter and the splitter adopt the prior art method, that is, the uplink frequency band corresponding to the splitter connected to the distributor 1 is 5MHz-204MHz, and the allocation is performed.
  • the frequency band corresponding to the splitter connected to the device 2 is 5 MHz to 204 MHz.
  • the distributor 1 receives an uplink signal transmitted by at least one brancher connected to the distributor 1, the uplink signal corresponding to a frequency band of 5 MHz to 204 MHz; and the distributor 2 receives at least one connected to the distributor 2.
  • the uplink signal sent by the brancher, the corresponding frequency band of the uplink signal is 5MHz-204MHz
  • the distributor 2 can move the signal to 204MHz-404MHz, and the signal on the 204MHz-404MHz frequency band is sent to the distributor 1, and the distributor 1 will be 204MHz-
  • the signal in the 404MHz band and the 5MHz-204MHz signal received by itself are concentrated.
  • the frequency band of the aggregated signal is 5MHz-404MHz, thereby effectively increasing the rate of uplink communication.
  • the uplink signal sent by the branch device connected to itself is received, and the steps in the above steps 101-103 are performed, but when the step 104 is executed, there is no head.
  • the distributor connected to the end device sends the convergence signal obtained after performing the band shifting after the steps 101-103 is performed to the previous allocator, so that the previous allocator will perform the steps 101-103.
  • Convergence signal after band shifting itself Converging the aggregated signal after the frequency band transmitted by the other distributors received, and transmitting the aggregated signal to the previous device (the previous device may be the other device of the headend device).
  • the head-end device and the dispenser or the point-to-point communication method between the distributor and the distributor, the method further includes:
  • the distributor sends the first signal to the head end device, and the distributor receives the downlink signal, wherein the downlink signal is a mixed signal of the signal sent by the head end device to the distributor and the interference signal, and the interference signal is sent to the distributor.
  • the first signal of the head end device is correlated; then, the allocator extracts the signal sent by the head end device to the distributor from the downlink signal according to the first signal.
  • the upstream frequency band in which the distributor communicates with the same device has the same frequency band as the downstream frequency band. That is, the uplink frequency band occupied by the first signal sent by the distributor to the head end device and the signal transmitted by the distributor receiving head end device to the distributor can use the same frequency band, so that there is interference in the signal received by the distributor. signal.
  • the uplink frequency band occupied by the first signal sent by the distributor to the head end device is 5 MHz-800 MHz
  • the downlink frequency band occupied by the signal received by the distributor receiving the head end device to the distributor is 700 MHz-1.2 GHz, due to uplink communication.
  • the downlink communication is performed simultaneously, so the downlink signal received by the distributor includes not only the signal of 700 MHz-1.2 GHz but also the interference signal related to the uplink signal of 5 MHz-800 MHz, and then the distributor can extract the head end device from the downlink signal.
  • the signal sent to the distributor is 5 MHz-800 MHz
  • the downlink frequency band occupied by the signal received by the distributor receiving the head end device to the distributor is 700 MHz-1.2 GHz, due to uplink communication.
  • the downlink communication is performed simultaneously, so the downlink signal received by the distributor includes not only the signal of 700 MHz-1.2 GHz but also the interference signal related to the uplink signal of 5 MHz-800 MHz, and then the distributor can extract the head end device from the
  • the above-mentioned allocator extracts the signal sent by the head end device to the distributor from the downlink signal according to the first signal, which is not limited by the present invention.
  • the distributor After the dispenser extracts the signal sent by the head end device to the distributor, the distributor also needs to send the signal to at least one branch device connected to the distributor, in the process,
  • the allocator determines whether the extracted frequency band of the signal sent by the head end device to the distributor is the same as the downlink frequency band of the at least one branch device connected to the distributor, wherein the downlink frequency band is performed by at least one branch device connected to the distributor Frequency band of communication;
  • the distributor directly sends the signal sent by the extracted head end device to the distributor to at least one branch device connected to the distributor;
  • the distributor extracts the signal with the frequency in the downlink frequency band from the signal sent by the head end device to the distributor, and then the distributor sends the extracted frequency signal on the downlink frequency band to the signal.
  • the entire frequency band (for example, 5 MHz - 1.2 GHz) can be used, and the downlink frequency band of at least one of the branches connected to the distributor in the entire frequency band is
  • the other frequency bands can carry redundant information, so that the line noise immunity can be enhanced.
  • the optimal situation is that the uplink communication and the downlink communication use the entire frequency band at the same time, for example, 5 MHz-1.2 GHz, that is, the frequency band of the existing downlink communication can be widened from 258 MHz to 1.218 GHz to 5 MHz-1.2.
  • the frequency band of the existing downlink communication can be widened from 258 MHz to 1.218 GHz to 5 MHz-1.2.
  • an increased portion of the frequency band can be used and transmitted with an error correcting code, so that the method provided by the present invention can also increase the rate of downlink communication.
  • the method provided by the present invention can be applied to various communication systems, for example, in a cable television communication system, such as a Hybrid Fiber-Coaxial (HFC) network. It can also be applied to a communication system including a base station, a user equipment, and a relay node, and the present invention does not limit the specific communication system of the application.
  • a cable television communication system such as a Hybrid Fiber-Coaxial (HFC) network.
  • HFC Hybrid Fiber-Coaxial
  • the head end device in the present invention may be a Cable Modem Terminal Systems (CMTS), and the uplink signal sent by the splitter to the distributor is at least one connected to the branch device.
  • CMTS Cable Modem Terminal Systems
  • the base station and the user equipment may include a multi-level relay node.
  • the FDD or the Time Division Duplexing (TDD) communication is used between the node and the user equipment.
  • the head end device in the present invention may be a base station, and the allocation in the present invention.
  • the device may be a relay node, and the branch device may be a user equipment, that is, the base station and the relay node, and the relay node uses the same frequency duplex technology, and the relay node and the user equipment may retain the existing way of communication.
  • the uplink frequency band of the distributor and the uplink frequency band and the downlink frequency band corresponding to the distributor connected to the distributor may be pre-configured by the system, or the device of the upper level may be configured for the device, and the present invention Do not limit it.
  • the present invention further provides a head end device, the head end device
  • the same frequency cancellation processing module can be set, and the same frequency cancellation module is used to implement the function of the same frequency cancellation:
  • the head end device and the distributor in the present invention communicate point-to-point, when the head end device sends a signal to the distributor, the distributor also sends the convergence signal to the band transmitted by the head end device, at this time.
  • the head end device receives a mixed signal, which is a mixed signal of the first signal and the interference signal sent by the distributor to the head end device, wherein the interference signal is related to the head end device transmitting a signal to the distributor.
  • the co-channel cancellation processing module in the head end device extracts, from the mixed signal, the convergence signal after the frequency band transmitted by the distributor to the head end device.
  • the function of co-channel cancellation in the headend device can also be performed by the processor in the headend device.
  • the head end device can extract the first signal sent by the distributor to the head end device from the mixed signal, so that the uplink resource and the downlink communication can use the same frequency band resource, thereby widening the frequency band of the uplink communication, and further Increase the rate of upstream communication.
  • FIG. 5 shows a specific implementation method of the method of the present invention applied to an HFC network.
  • the total uplink communication frequency band in the trunk cable is 5 MHz to 1.218 GHz
  • the total downlink communication in the trunk cable is The frequency band is also 5 MHz to 1.218 GHz, and the same frequency duplexing technique is used between the head end device and the distributor, or between the distributor and the distributor.
  • Each splitter is connected to a splitter, each splitter is connected to multiple CMs, and each splitter belongs to point-to-multipoint communication between each CM, adopts the original communication mode of DOCSIS3.1, uplink and downlink FDD, and downlink communication occupation
  • the frequency band is 258 MHz to 1.218 GHz, and the frequency band occupied by the uplink communication is 5 MHz to 204 MHz.
  • Each of the distributors has signal processing capabilities, such as: mixing function, to achieve digital domain or analog domain frequency conversion, in the system, the trunk-specific uplink frequency band can be pre-assigned to each CM corresponding branch line, for example, 1 GHz to 1.2 GHz is allocated to The sixth branch line (the branch line corresponding to CM6), 800MHz to 1GHz is allocated to the fifth branch line (the branch line corresponding to CM5), 600MHz to 800MHz is allocated to the fourth branch line (the branch line corresponding to CM4), and 400MHz to 600MHz is allocated to the third line.
  • One branch line (the branch line corresponding to CM3), 200MHz to 400MHz is allocated to the second branch line (the branch line corresponding to CM2), and 5MHz to 200MHz is allocated to the first branch line (the branch line corresponding to CM1).
  • the uplink frequency band is always converged.
  • the brancher 6 receives the uplink signals sent by the multiple CMs connected to the brancher 6, the uplink signals are aggregated, and the aggregated uplink signals are sent to the distribution.
  • the distributor 6 performs up-conversion processing on the signal, and moves the signal to 1 GHz to 1.2 GHz; and transmits the processed signal of 1 GHz to 1.2 GHz to the distributor 5, and similarly, the distributor 5 receives the signal.
  • the signal sent by the brancher 5 is moved to 800 MHz to 1 GHz, and the distributor 5 simultaneously combines the uplink signals carried by the distributor 6 from 1 GHz to 1.2 GHz to obtain an uplink signal carried in the 800 MHz to 1.2 GHz band, and so on, and the distributor 1 receives
  • the signal is moved to 5 MHz to 200 MHz, and the distributor 1 simultaneously combines the uplink signals of the 200 MHz to 1.2 GHz transmitted by the distributor 2 to obtain an uplink frequency band of 5 MHz to 1.218.
  • Signal carried by GHz is carried by GHz.
  • the entire frequency band is broadcasted in the downlink, and the uplink gradually aggregates, and after reaching the head end, the entire frequency band is occupied, thereby effectively increasing the rate of uplink communication.
  • the information transmitted by the distributor to the CM cannot occupy the entire frequency band, such as the above 5MHz to 1.218GHz, and can only occupy at most 258MHz to 1.218GHz; but the CMTS transmits to the distribution.
  • the signal of the device can occupy the entire frequency band.
  • the distributor only sends the signal of the 258MHz to 1.218GHz frequency band in the signal of the frequency band of 5MHz to 1.218GHz transmitted by the CMTS to the CM.
  • the CMTS transmits the signal to the distributor.
  • the 5MHz to 204MHz frequency band can carry information related to the distributor, such as the control information of the distributor, including the frequency points carried by each distributor, or carry redundant information to enhance the anti-noise capability of the line. Also when the CM sends a signal to the distributor, the frequency band is also converged.
  • the distributor 3 communicates with the distributor 2 in an uplink manner, and can occupy the entire frequency band of 5 MHz to 1.218 GHz. However, the CM-related signal sent by the distributor 3 to the distributor 2 occupies a spectrum width of 200 MHz, and other frequency bands can carry the distributor 3 for use. Control information, or redundant information to enhance noise immunity.
  • FIG. 6 is a schematic structural diagram of a dispenser according to Embodiment 1 of the present invention. As shown in FIG. 6, the dispenser includes:
  • the receiver 11 is configured to receive an uplink signal sent by at least one splitter connected to the splitter, where each uplink signal is located in a different frequency band;
  • the processor 12 is configured to aggregate multiple uplink signals to obtain a convergence signal.
  • the processor 12 is further configured to perform frequency band shifting on the convergence signal, so that a frequency band of the convergence signal after the frequency band is moved is within a range of an uplink frequency band of the distributor;
  • the transmitter 13 is configured to send the first signal to the head end device, where the first signal includes a convergence signal after the frequency band is moved.
  • the first signal further includes a signal sent by a distributor connected adjacent to the distributor.
  • the receiver 11 is further configured to:
  • the processor 12 is further configured to aggregate the received signal sent by the distributor connected to the distributor and the convergence signal after the frequency band is moved to obtain the first signal.
  • the receiver 11 is configured to: receive an original signal sent by an allocator connected to the distributor, in terms of acquiring a signal sent by the distributor connected to the distributor;
  • the processor 12 is further configured to: extract, from the original signal, a signal on an uplink frequency band corresponding to a frequency divider connected to the distributor to obtain a signal transmitted by the distributor connected to the distributor.
  • the receiver 11 is further configured to: when the transmitter 13 sends the first signal to the head end device, receive the downlink signal, where the downlink signal is a mixed signal of the signal sent by the head end device to the distributor and the interference signal, The interference signal is related to the first signal sent by the distributor to the head end device;
  • the processor 12 is further configured to extract, from the downlink signal, the signal sent by the head end device to the distributor according to the first signal.
  • the processor 12 is further configured to: after extracting the signal sent by the head end device to the distributor, extract a signal with a frequency in a downlink frequency band from a signal sent by the head end device to the distributor, where the downlink frequency band is a distributor and a frequency band in which at least one of the splitters connected to the splitter communicates;
  • the transmitter 13 is further configured to transmit the extracted frequency signal on the downlink frequency band to at least one of the splitters connected to the distributor.
  • the uplink frequency band in which the distributor communicates with the same device has the same frequency band as the downlink frequency band.
  • the distributor of this embodiment can be used to implement the technical solution of the method embodiment shown in FIG. 4, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 7 is a schematic structural diagram of a dispenser according to Embodiment 2 of the present invention. As shown in FIG. 7, the dispenser includes:
  • the receiving module 21 is configured to receive an uplink signal sent by at least one splitter connected to the allocator, Each upstream signal is located in a different frequency band;
  • the aggregation module 22 is configured to aggregate multiple uplink signals to obtain a convergence signal.
  • the frequency band shifting module 23 is configured to perform frequency band shifting of the convergence signal such that a frequency band of the aggregated signal after the frequency band is moved is within a range of an uplink frequency band of the distributor;
  • the sending module 24 is configured to send the first signal to the head end device, where the first signal includes a convergence signal after the frequency band is moved.
  • the first signal further includes a signal sent by a distributor connected adjacent to the distributor.
  • the receiving module 21 is further configured to: before the sending module sends the first signal to the head end device, acquire a signal sent by the allocator connected to the distributor;
  • the convergence module 22 is further configured to aggregate the received signal sent by the distributor connected to the distributor and the convergence signal after the frequency band is moved to obtain the first signal.
  • the receiving module 21 is specifically configured to:
  • a signal on the upstream frequency band corresponding to the distributor connected adjacent to the distributor is extracted from the original signal to obtain a signal transmitted by the distributor connected adjacent to the distributor.
  • the receiving module 21 is further configured to: when the sending module 24 sends the first signal to the head end device, receive the downlink signal, where the downlink signal is a mixed signal of the signal sent by the head end device to the allocator and the interference signal, The interference signal is related to the first signal sent by the distributor to the head end device;
  • the signal transmitted by the head end device to the distributor is extracted from the downlink signal according to the convergence signal after the frequency band is moved.
  • the receiving module 21 is further configured to: after extracting the signal sent by the head end device to the distributor, extract a signal with a frequency in a downlink frequency band from a signal sent by the head end device to the distributor, and the downlink frequency band is a distributor and an allocation. a frequency band in which at least one of the branches connected to the device communicates;
  • the sending module 24 is further configured to send the extracted frequency signal on the downlink frequency band to at least one branch device connected to the distributor.
  • the uplink frequency band in which the distributor communicates with the same device has the same frequency band as the downlink frequency band.
  • the distributor of this embodiment can be used to implement the technical solution of the method embodiment shown in FIG. 4, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the embodiment of the present invention further provides a frequency band processing system, including a head end device, a plurality of distributors corresponding to the embodiment of FIG. 7, a plurality of branches, and a plurality of terminal devices;
  • each of the distributors is connected in series, the head end device is connected to the first distributor, and each of the distributors is connected to at least one branch device; each branch device is connected to at least one terminal device.
  • the specific connection manner is similar to that of FIG. 3, and details are not described herein again.
  • dispenser of the present invention is merely a name, and may also be a band processing device, and the present invention is not limited to the dispenser alone.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing storage medium includes: a read-only memory (Read-Only Memory, ROM for short), a random access memory (RAM), a disk, or a disk.
  • ROM Read-Only Memory
  • RAM random access memory
  • disk a disk
  • a variety of media such as optical discs that can store program code.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de traitement de bande de fréquences, un distributeur et un système. Le procédé de traitement de bande de fréquences comprend les étapes suivantes: un distributeur reçoit des signaux de liaison montante envoyés par au moins un diviseur connecté au distributeur, chaque signal de liaison montante étant situé dans des bandes de fréquence différentes; le distributeur regroupe ensuite une pluralité de signaux de liaison montante pour obtenir un signal composite; le distributeur effectue ensuite un décalage de bande de fréquences sur le signal composite de telle sorte qu'une bande de fréquences du signal composite, soumise à un décalage de bande de fréquences, se trouve à l'intérieur de la plage d'une bande de fréquences de liaison montante du distributeur; et enfin, le distributeur envoie, à un dispositif de tête de réseau, un premier signal comprenant le signal composite soumis au décalage de bande de fréquences. Du fait que le distributeur peut décaler une bande de fréquences d'un signal reçu, un signal dans une bande de basses fréquences peut être décalé vers une bande de hautes fréquences de telle sorte qu'une bande de fréquences pour des communications de liaison montante peut être élargie, accroissant ainsi la vitesse de communications de liaison montante.
PCT/CN2016/078190 2016-03-31 2016-03-31 Procédé de traitement de bande de fréquences, distributeur et système Ceased WO2017166230A1 (fr)

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CN201680066733.2A CN108352898B (zh) 2016-03-31 2016-03-31 频带处理方法、分配器和系统
PCT/CN2016/078190 WO2017166230A1 (fr) 2016-03-31 2016-03-31 Procédé de traitement de bande de fréquences, distributeur et système

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CN1494240A (zh) * 2002-10-31 2004-05-05 深圳市中兴通讯股份有限公司 一种光纤同轴混合接入网回传噪声抑制的方法
CN101702634A (zh) * 2009-11-12 2010-05-05 无锡路通光电技术有限公司 实现射频无源光网络提供docsis服务的装置及方法
CN102577181A (zh) * 2009-09-25 2012-07-11 华为技术有限公司 经由下一代光纤-同轴电缆混合网络的无源光网络电缆数据业务接口规范上游代理架构
US20130028253A1 (en) * 2011-07-28 2013-01-31 Cisco Technology, Inc. Transmission of multi-channel mpeg
CN103875240A (zh) * 2013-09-30 2014-06-18 华为技术有限公司 一种数据传输的方法、装置及系统

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1494240A (zh) * 2002-10-31 2004-05-05 深圳市中兴通讯股份有限公司 一种光纤同轴混合接入网回传噪声抑制的方法
CN102577181A (zh) * 2009-09-25 2012-07-11 华为技术有限公司 经由下一代光纤-同轴电缆混合网络的无源光网络电缆数据业务接口规范上游代理架构
CN101702634A (zh) * 2009-11-12 2010-05-05 无锡路通光电技术有限公司 实现射频无源光网络提供docsis服务的装置及方法
US20130028253A1 (en) * 2011-07-28 2013-01-31 Cisco Technology, Inc. Transmission of multi-channel mpeg
CN103875240A (zh) * 2013-09-30 2014-06-18 华为技术有限公司 一种数据传输的方法、装置及系统

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