WO2017166230A1

WO2017166230A1 - Frequency band processing method, distributor and system

Info

Publication number: WO2017166230A1
Application number: PCT/CN2016/078190
Authority: WO
Inventors: 司小书; 张利; 欧阳涛; 张小龙; 莫德·卡尔
Original assignee: 华为技术有限公司
Priority date: 2016-03-31
Filing date: 2016-03-31
Publication date: 2017-10-05
Also published as: CN108352898B; CN108352898A

Abstract

Provided are a frequency band processing method, a distributor and a system. The frequency band processing method comprises: a distributor receiving uplink signals sent by at least one splitter connected to the distributor, each uplink signal being located in different frequency bands; the distributor then aggregating a plurality of uplink signals to obtain an aggregate signal; the distributor then performing frequency band shift on the aggregate signal so that a frequency band of the aggregate signal, subjected to frequency band shift, is within the range of an uplink frequency band of the distributor; and finally, the distributor sending, to a head-end device, a first signal comprising the aggregate signal subjected to frequency band shift. Since the distributor can shift a frequency band of a received signal, a signal in a low-frequency band can be shifted to a high-frequency band so that a frequency band for uplink communications can be widened, thereby increasing the speed of uplink communications.

Description

Band processing method, distributor and system

Technical field

The present invention relates to communication technologies, and in particular, to a frequency band processing method, a distributor, and a system.

Background technique

FIG. 1 is a schematic diagram of a cable structure of a cable network based on a cable television network. As shown in FIG. 1 , 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. In addition, uplink and downlink use Frequency Division Duplexing (FDD) mode communication, and 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, and 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.

However, due to this asymmetric spectrum division, the frequency band occupied by the uplink communication is narrow, so that the uplink communication efficiency is low.

Summary of the invention

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:

First, 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.

In this embodiment, 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 of the uplink communication. Band, which in turn increases the rate of upstream communication.

In some embodiments of the invention, the first signal further includes a signal transmitted by a distributor adjacent to the dispenser.

When the first signal includes the convergence signal after the frequency band is moved and the signal sent by the distributor connected to the distributor, before the distributor sends the first signal to the head end device, 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.

In some embodiments of the invention, 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.

In this embodiment, 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.

In some embodiments of the present invention, 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.

In this embodiment, by the method of frequency band shifting, 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.

In some embodiments of the present invention, after the distributor extracts the signal sent by the head end device to the distributor, 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.

In this embodiment, 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.

In some embodiments of the invention, the upstream frequency band in which the distributor communicates with the same device has the same frequency band as the downstream frequency band.

In this embodiment, since 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.

In some embodiments of the present invention, 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.

In some embodiments of the present invention, 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.

In some embodiments of the present invention, 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.

In some embodiments of the present invention, 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.

In some embodiments of the present invention, 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.

In some embodiments of the present invention, 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.

In the embodiment of the present invention, 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. 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.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description Are some embodiments of the invention, to those of ordinary skill in the art In other words, other drawings can be obtained based on these drawings without paying for creative labor.

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;

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.

detailed description

Based on the cable structure diagram and frequency band allocation of the existing cable television network shown in FIG. 1 and FIG. 2, how to achieve uplink aggregation in the prior art is further illustrated.

Figure 3 shows the uplink aggregation mode in the prior art. As shown in Figure 3, it is assumed that there are three distributors in the system, namely, 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. In the prior art, 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. Specifically, 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. 5MHz-204MHz, and the system needs to be on 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.

In order to improve the uplink communication rate, 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.

The technical solutions of the present invention will be described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

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.

In the present invention, 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. However, in order to save cost and reduce the complexity of the system, in actual use, 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.

Optionally, in an implementation manner of the present invention, if only one splitter is connected to the splitter, 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.

Optionally, if the foregoing description is directly connected to the head end device, 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. Before the device, 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.

Through the above-mentioned method of step-by-stage aggregation, 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.

In order to ensure that the first signal is acquired by the distributor, 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,

If the frequency band of the original signal is the same as the uplink frequency band corresponding to the distributor adjacent to the distributor, the distributor directly performs the step of acquiring the first signal;

If the frequency band of the original signal is different from the uplink frequency band corresponding to the distributor connected to the distributor, 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.

For example, if the frequency band of the original signal is 5MHz-1200MHz, and the upstream frequency band corresponding to the distributor connected to the distributor is 500MHz-1200MHz, then the distributor will extract the frequency from 500MHz in the original signal of 5MHz-1200MHz- The signal at 1200 MHz is then assigned to perform the above-described step of acquiring the first signal based on the extracted signal at 500 MHz - 1200 MHz. Wherein, 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. For example, 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.

By the above method, when communicating between two distributors, 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,

If the frequency band of the convergence signal is not within the range of the upstream frequency band of the splitter, 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.

For example, 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.

By the method of frequency band shifting, 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.

It is explained in detail by the following example: since 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, and 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. When 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. During the transmission of the signal, 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. At this time, the frequency band of the aggregated signal is 5MHz-404MHz, thereby effectively increasing the rate of uplink communication.

Through the above analysis, for any one of the distributors in the system, 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).

In the present invention, the head-end device and the dispenser, or the point-to-point communication method between the distributor and the distributor, the method further includes:

First, 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.

In the present invention, 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.

For example, the uplink frequency band occupied by the first signal sent by the distributor to the head end device is 5 MHz-800 MHz, and 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. And 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.

It should be noted that 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.

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;

If the same, 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;

If not the same, 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. At least one splitter to which the dispenser is connected.

By the above method, when performing downlink communication between the distributor and the head end device, 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.

In the present invention, 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. In GHz, 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.

It should be noted that 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.

When applied in an HFC network, 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. The convergence signal of the uplink signal sent by the cable modem (Cable Modem, hereinafter referred to as CM) to the brancher.

When applied in a communication system including a base station, a user equipment, and a relay node, the base station and the user equipment may include a multi-level relay node. In the existing solution, between the base station and the relay node and the relay node, The FDD or the Time Division Duplexing (TDD) communication is used between the node and the user equipment. When the solution of the present invention is applied, 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 above application scenario is only an example, and the present invention does not limit it.

In the present invention, 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.

Based on the foregoing various embodiments, 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:

Because 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 reason why the interference signal may occur is the same as that of the above embodiment, and details are not described herein again.

After the head end device receives the mixed signal, 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.

Based on the above description, the function of co-channel cancellation in the headend device can also be performed by the processor in the headend device.

In this embodiment, 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. As shown in FIG. 5, the total uplink communication frequency band in the trunk cable is 5 MHz to 1.218 GHz, and 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).

In the system, the uplink frequency band is always converged. When 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 After the uplink convergence signal sent by the splitter 1 connected to the distributor 1, 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.

In this way, 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.

Because the uplink and downlink of each branch cable adopts the FDD method, 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. At this time, 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. Alternatively, 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.

Optionally, the first signal further includes a signal sent by a distributor connected adjacent to the distributor.

Optionally, the receiver 11 is further configured to:

Acquiring a signal sent by the distributor connected adjacent to the distributor before the transmitter 13 sends the first signal to the head end device;

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.

Optionally, 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.

Optionally, 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.

Optionally, 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.

Optionally, 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.

Optionally, 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.

Optionally, in the aspect of acquiring a signal sent by the distributor connected to the distributor, the receiving module 21 is specifically configured to:

Receiving an original signal transmitted by a distributor connected adjacent to the distributor;

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.

Optionally, 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.

Optionally, 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 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;

Wherein, 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.

The implementation principle and technical effects of the band processing system of this embodiment are similar to those of the embodiment shown in FIG. 7, and details are not described herein again.

It should be noted that the above-mentioned 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.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. 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. A variety of media such as optical discs that can store program code.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A frequency band processing method, comprising:

The distributor receives an uplink signal sent by at least one of the branches connected to the distributor, and each of the uplink signals is located in a different frequency band;

The allocating the plurality of uplink signals to obtain a convergence signal;

The splitter performs 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 allocator sends the first signal to the head end device, and the first signal includes the convergence signal after the frequency band is moved.
The method of claim 1 wherein said first signal further comprises a signal transmitted by a distributor adjacent to said distributor.
The method according to claim 2, wherein before the dispatching the first signal to the head end device, the method further comprises:

The dispenser acquires a signal transmitted by a distributor connected adjacent to the dispenser;

The distributor aggregates a signal transmitted by a distributor connected to the distributor adjacent to the convergence signal after the frequency band is moved to acquire the first signal.
The method according to claim 3, wherein the acquiring the signal transmitted by the distributor adjacent to the distributor comprises:

The dispenser receives an original signal transmitted by a distributor connected adjacent to the dispenser;

The distributor extracts, from the original signal, a signal on an uplink frequency band corresponding to a distributor adjacent to the distributor to obtain a signal transmitted by an allocator connected adjacent to the distributor.
The method according to any one of claims 1 to 4, wherein the method further comprises:

While the distributor sends the first signal to the head end device, the distributor receives a 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;

And the identifier extracts, according to the first signal, a signal sent by the head end device to the distributor from the downlink signal.
The method according to claim 5, further comprising: after extracting the signal sent by the head end device to the distributor, the method further comprising:

The splitter extracts a signal having 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 performed by at least one branch device connected to the distributor and the distributor Frequency band of communication;

The distributor transmits the extracted signal of the frequency on the downlink frequency band to at least one splitter connected to the distributor.
The method according to any one of claims 1 to 6, wherein the uplink frequency band in which the distributor communicates with the same device has the same frequency band as the downlink frequency band.
A dispenser, comprising:

a receiver, configured to receive an uplink signal sent by at least one splitter connected to the splitter, where each of the uplink signals is located in a different frequency band;

a processor, configured to aggregate the multiple uplink signals to obtain a convergence signal;

The processor 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;

And a transmitter, configured to send the first signal to the head end device, where the first signal includes the convergence signal after the frequency band is moved.
The dispenser of claim 8 wherein said first signal further comprises a signal transmitted by a distributor adjacent to said dispenser.
The splitter according to claim 9, wherein said receiver is further configured to: obtain an adjacent connection with said distributor before said transmitter sends said first signal to said head end device The signal sent by the distributor;

The processor 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 acquire the first signal.
The dispenser according to claim 10, wherein the receiver is specifically configured to receive an adjacent connection with the dispenser in terms of acquiring a signal transmitted by a distributor adjacent to the dispenser The original signal sent by the distributor;

The processor is further configured to: extract, from the original signal, a signal on an uplink frequency band corresponding to a distributor that is adjacent to the distributor to obtain a distributor that is adjacent to the distributor The signal sent.
The splitter according to any one of claims 8 to 11, wherein the receiver is further configured to: receive a downlink signal while the transmitter sends the first signal to a head end device, The downlink signal is a mixed signal of a signal sent by the head end device to the distributor and an interference signal, and the interference 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, a signal sent by the head end device to the distributor from the downlink signal.
The distributor according to claim 12, wherein the processor is further configured to: after extracting a signal sent by the head end device to the distributor, to allocate the signal from the head end device Extracting, in the signal sent by the device, a signal having a frequency in a downlink frequency band, wherein the downlink frequency band is a frequency band in which the distributor communicates with at least one branch device connected to the distributor;

The transmitter is further configured to send the extracted signal of the frequency on the downlink frequency band to at least one branch device connected to the distributor.
The splitter according to any one of claims 8 to 13, wherein the upstream frequency band and the downstream frequency band in which the distributor communicates with the same device have the same frequency band.
A dispenser, comprising:

a receiving module, configured to receive an uplink signal sent by at least one splitter connected to the splitter, where each of the uplink signals is located in a different frequency band;

An aggregation module, configured to aggregate the multiple uplink signals to obtain a convergence signal;

a frequency band shifting module, 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;

And a sending module, configured to send the first signal to the head end device, where the first signal includes the convergence signal after the frequency band is moved.
The dispenser of claim 15 wherein said first signal further comprises a signal transmitted by a distributor adjacent to said dispenser.
The distributor according to claim 16, wherein the receiving module is further configured to: acquire, adjacent to the distributor, before the sending module sends the first signal to the head end device The signal sent by the distributor;

The aggregation module 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 acquire the first signal.
The dispenser of claim 17 wherein said dispenser is obtained An aspect of a signal transmitted by an adjacent connected distributor, the receiving module is specifically configured to:

Receiving an original signal transmitted by a distributor connected adjacent to the distributor;

A signal on an upstream frequency band corresponding to a distributor adjacent to the distributor is extracted from the original signal to acquire a signal transmitted by a distributor adjacent to the distributor.
The distributor according to any one of claims 15-17, wherein the receiving module is further configured to: when the sending module sends the first signal to the head end device, receive the downlink signal, The downlink signal is a mixed signal of a signal sent by the head end device to the distributor and an interference signal, and the interference signal is related to the first signal sent by the distributor to the head end device;

And extracting, according to the first signal, a signal sent by the head end device to the distributor from the downlink signal.
The distributor according to claim 19, wherein the receiving module is further configured to: after extracting a signal sent by the head end device to the distributor, from the head end device to the distributor Extracting, in the transmitted signal, a signal having a frequency in a downlink frequency band, wherein the downlink frequency band is a frequency band in which the distributor communicates with at least one branch device connected to the distributor;

The sending module is further configured to send the extracted signal of the frequency on the downlink frequency band to at least one branch device connected to the distributor.
A dispenser according to any one of claims 15 to 20, wherein the upstream frequency band in which the distributor communicates with the same device has the same frequency band as the downstream frequency band.
A frequency band processing system, comprising: a head end device, a plurality of the distributor according to any one of claims 15-21, 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 of the distributors, and each of the distributors is connected to at least one of the branches; each of the branches is connected to at least one of the Terminal Equipment.