CN110290091B

CN110290091B - Data acceleration flash memory

Info

Publication number: CN110290091B
Application number: CN201910556227.7A
Authority: CN
Inventors: 王兴文
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2022-04-01
Anticipated expiration: 2039-06-25
Also published as: CN110290091A

Abstract

The invention provides a data acceleration capacity expansion device, comprising: the optical wave decomposition multiplexing module, the optical receiving module, the tuning demodulation function module, the QAM modulation module, the central processing unit CPU module, the frequency mixing module and the radio frequency amplification module are connected, and the composite optical signal can be converted into a radio frequency signal and transmitted to the terminal receiver, so that data processing of an IP network is realized, downlink bandwidth of trunk IP data output by a broadcasting television HFC network branch front end can be greatly improved, and the bandwidth can also be improved to a high speed of hundreds of megabytes.

Description

Data acceleration flash memory

Technical Field

The invention relates to a wired broadband speed-increasing and capacity-expanding system, in particular to a data speed-increasing and capacity-expanding device.

Background

Cable television networks have evolved to date since their birth, over 40 years, providing quality television broadcast services to billions of users. However, with the rapid development of IP technology, fiber to the home, the popularization of 4G technology, and the arrival of the 5G era, the cable television network has received unprecedented enormous impact. The unidirectional transmission service provided by the cable television broadcast network to the users is increasingly difficult to meet the requirements of the wide range of users on video content. As early as twenty years ago, some cable operators began to try to make bidirectional changes to cable networks using technologies such as Docsis, and although some effects were achieved, the operation was reluctant to remain in the age of widespread low bandwidth entry to the home in the past. However, with the fiber-to-the-home mode rapidly popularized by telecommunication operators, the bandwidth to the home is rapidly increased from the past 2M, 5M, 10M to 50M, 100M or even 200M. This makes broadcasting and TV and telecommunications IP bandwidth difference of registering one's residence rapidly widen, and broadcasting and TV's competitive disadvantage is more obvious. In recent years, the number of cable television subscribers has been rapidly lost worldwide. Although the cable television bidirectional technology is also continuously upgraded and improved, for example, the technical standard of the Docsss is upgraded to 3.1, the downlink bandwidth can reach 10G at most, and the uplink bandwidth and the downlink bandwidth can reach 2G. The EOC technology has great progress, and the Homeplug AV2.0 technology commonly adopted by the radio and television at present can achieve the purpose that the uplink and downlink shared bandwidth reaches or approaches 300 Mbps. The HiNOC standard which is popularized in China at present can reach the transmission rate of 1Gbps physical layer! However, the cable bidirectional transmission technology commonly used by cable broadcast television operators at present has obvious defects which affect the competition of the cable bidirectional transmission technology with competitors.

Disclosure of Invention

The invention provides a data acceleration capacity expansion device which is an important component of a cable broadband acceleration capacity expansion system and is used for improving the IP data transmission rate of a user terminal under the cable television HFC unidirectional broadcast network environment, thereby realizing the purpose of whole network broadband acceleration capacity expansion.

In order to achieve the purpose, the invention provides the following technical scheme:

the system comprises a light wave decomposition multiplexing module, a light receiving module, a tuning demodulation function module, a QAM modulation module, a Central Processing Unit (CPU) module, a frequency mixing module and a radio frequency amplification module;

the data speed-up capacity-expanding device receives a composite optical signal, separates two groups of optical wave signals through the optical wave demultiplexing module, transmits the optical wave signals to the optical receiving module, the optical receiving module converts the optical wave signals into two groups of radio frequency signals and outputs the two groups of radio frequency signals, one group of radio frequency signals comprises IP data, the other group of radio frequency signals comprises broadcast television services, the one group of radio frequency signals comprises IP data and is input into the tuning and demodulating function module, the tuning and demodulating function module finishes tuning and outputs multi-path MPTS flow signals to the QAM modulation module, the QAM modulation module demultiplexes and re-multiplexes the multi-path MPTS flow signals to form a new multi-path MPTS flow, the QAM modulation module modulates and outputs radio frequency signals of a plurality of frequency points, and then the output radio frequency signals and the other group of radio frequency signals comprising broadcast television services output by the optical receiving module are mixed in the frequency mixing module, forming a mixing signal and outputting the mixing signal to a radio frequency amplification module, wherein the radio frequency amplification module converts the chaotic signal into a radio frequency signal comprising a cable main operation television signal and an IP data signal and outputs the radio frequency signal to a terminal receiver; the central processing CPU module is connected with the QAM modulation module and is connected with the plurality of tuning demodulation modules.

The method comprises the steps of resolving a control command from TS (transport stream) sent by a superior front end in a QAM (Quadrature amplitude modulation) modulation module, completing frequency locking and demodulation operations of the QAM modulation module and demultiplexing and re-multiplexing operations of multi-path MPTS according to the control command, and completing setting of working parameters of the QAM modulation module and completing a modulation process of the newly multiplexed multi-path MPTS.

The CPU unit of the central processing unit sends out a control command according to the communication protocol specification, thereby completing the frequency locking operation and the demodulation parameter setting operation of the tuning and demodulating unit, the demultiplexing control and the multiplexing control of the multi-path MPTS stream output by the tuning and demodulating unit in the QAM modulating module, and the parameter setting operation of the QAM modulating module.

Preferably, the optical wave decomposition and multiplexing module is a dense wavelength division multiplexing DWDM functional module or an optical division multiplexing WDM functional module.

Preferably, the tuning and demodulation function module is provided with 8-32 functional units, and can tune and demodulate MPTS streams of multiple frequency points from input radio frequency signals at the same time.

Preferably, the QAM modulation module further includes an FPGA chip or a QAM modulation dedicated chip, and the FPGA chip or the QAM modulation dedicated chip completes input, demultiplexing, remultiplexing, and QAM modulator signal conversion of the multi-path MPTS stream.

Preferably, the QAM modulation module is connected with the central processing CPU module through a high-speed serial interface.

Preferably, the central processing CPU module is connected to the plurality of modem modules via an I2C interface.

Preferably, the QAM modulation module parses communication signaling in PAT, PMT, SI, PSI, and PSIP tables defined in any frequency point and transmits the signaling to the central processing CPU module, and then the central processing CPU module parses a control command corresponding to the data speed-raising capacity-increasing device, and the central processing CPU module controls the QAM modulation module according to the control command to perform demultiplexing on each path of MPTS input stream, and re-multiplexes the SPTS stream output by demultiplexing into a new MPTS stream, thereby completing the whole communication protocol process.

Preferably, the light receiving module and the radio frequency amplifying module are integrated in the casing of the data speed-increasing capacity-expanding device.

Through implementing above technical scheme, have following technological effect: the device can convert the composite optical signal into a radio frequency signal and transmit the radio frequency signal to a terminal receiver through the connection of a light wave decomposition multiplexing module, a light receiving module, a tuning demodulation function module, a QAM modulation module, a Central Processing Unit (CPU) module, a frequency mixing module and a radio frequency amplification module, thereby realizing the data processing of an IP network; the device is used as an important component of a cable broadband speed-increasing and capacity-expanding system to improve the IP data transmission rate of a user side under the cable television HFC unidirectional broadcast network environment, thereby realizing the purpose of whole network broadband speed-increasing and capacity-expanding; the device can separate and respectively process double optical wave signals output by an optical node of an HFC network, and finally convert two groups of optical signals into radio frequency electric signals and carry out frequency mixing output, thereby realizing the purpose of transmitting high-bandwidth IP data and original network television service signals in the HFC network of the cable television; the device can separate IP data required by a user from huge trunk IP data to complete IP data exchange at a network node; the device defines a network control command transmission protocol by using a digital television standard specification, and realizes a node exchange function in a unidirectional broadcast network environment; the device integrates the data acceleration and capacity expansion functional module and the light receiving amplification module into one device, so that the reconstruction work of a network part can be completed only by directly replacing the receiver equipment of the original network at each optical node, the reconstruction work load is small, and the trouble and the additional investment of increasing the space of the original case due to the addition of additional equipment are avoided.

Drawings

FIG. 1 is a schematic connection diagram of a cable broadband speed-up capacity expansion system according to the present invention;

fig. 2 is a schematic connection diagram of the data speed-up expansion device according to the present invention.

Detailed Description

In order to better understand the technical scheme of the invention, the following detailed description is made on the embodiments provided by the invention in combination with the accompanying drawings.

An embodiment of the present invention provides a cable broadband speed-up capacity-expansion system, as shown in fig. 1,

a wired broadband speed-up capacity-expansion system is characterized in that,

the system comprises a core switch 20, an IPQAM modulation device 21, an optical transmitter 22, an optical multiplexer 23, a data speed-up capacity-expansion device 24 and a terminal receiver 25;

the core switch 20 is connected to the internet and can receive the IP uplink data uploaded by the user home through the IP network; the core switch 20 separates the Internet Protocol (IP) data into IP uplink data and IP downlink data by uplink and downlink, and the core switch 20 performs grouping and sub-packet processing on the IP downlink data in sequence; then, the IP downlink data packet which is subjected to the packet processing is sent to an IPQAM modulation device 21; an IPQAM modulation device 21 converts an IP downlink data packet into an MPTS stream according to an instruction requirement sent by a core switch 20, and then modulates the MPTS stream to form a multi-frequency-point radio frequency signal, the IPQAM modulation device 21 sends the multi-frequency-point radio frequency signal to an optical transmitter 22, the optical transmitter 22 converts the multi-frequency-point radio frequency signal into an optical signal and sends the optical signal to an optical multiplexer 23, the optical multiplexer 23 performs composite processing on the optical signal and a television service optical signal transmitted by a broadcast television large network to form a composite optical signal and sends the composite optical signal to a data speed-up capacity expansion device 24, and the data speed-up capacity expansion device 24 converts the composite optical signal into a radio frequency signal and sends the radio frequency signal to a terminal receiver 25;

the user family receives the cable main operation television signal and the IP downlink data signal in the radio frequency signal transmitted by the data speed-up capacity expansion device 24 through the terminal receiver 25, and forms an effective path with the core switch 20 through the IP network to complete IP data return, thereby realizing all functions of the whole IP data communication.

Specifically, the IPAQAM modulation device 21 is connected to the core switch 20 through a gigabit IP interface or an optical fiber interface, and the IP downlink data packets of 6Gbps or more are modulated into radio frequency signals of 100 or more bandwidths of 8MHz within the analog bandwidth of 44MHz to 900MHz by the IPQAM modulation device 21, respectively.

Specifically, the optical multiplexer 23 is a dense wavelength division multiplexing DWDM or a wavelength division multiplexing WDM.

Specifically, the optical multiplexer 23 transmits the composite optical signal to a plurality of optical splitters of the HFC network, and the optical splitters transmit the composite optical signal to the IP data speed-increasing and capacity-increasing device 24 through a plurality of optical nodes of the HFC network.

Specifically, the IP data exchange protocols all comply with IP communication protocol specification requirements.

Specifically, the core switch 20 performs uplink and downlink separation on the IP data of the internet into IP uplink data and IP downlink data, and after the core switch 20 performs packet and sub-packet processing on the IP downlink data in sequence, dynamic frequency point allocation is performed according to the number of users and the bandwidth occupation situation under each optical node, and a static frequency point division method can be adopted when the number of users is small.

Specifically, the static frequency point dividing method is characterized in that each IP address is assigned with a PID, and then MPTS multiplexing, modulation, demodulation, demultiplexing, re-multiplexing, and QAM modulation are performed through the IPQAM modulation device 21 according to the position of the IP address to obtain the IP data to be obtained.

Specifically, the terminal receiver 25 has both IP network routing and DVB-C standard cable television signal reception functions, and distributes the IP data to the user terminals.

Specifically, the terminal receiver 25 communicates with the front-end core switch 20 through the physical network to complete uploading the IP data.

Specifically, the physical network is a CMTS network, an EoC network, a LAN network, a telecommunication fiber to the home network, an ADSL network, or a 4G network.

As shown in fig. 2, an embodiment of the present invention further provides a data acceleration capacity expansion device 24, which includes:

the system comprises a light wave decomposition multiplexing module 10, a light receiving module 11, a tuning demodulation function module 13, a QAM modulation module 14, a central processing unit CPU module 15, a frequency mixing module 16 and a radio frequency amplification module 17;

the data speed-up capacity-expansion device receives a composite optical signal, separates two groups of optical wave signals through the optical wave demultiplexing module 10, transmits the optical wave signals to the optical receiving module 11, the optical receiving module 11 converts the optical wave signals into two groups of radio frequency signals and outputs the two groups of radio frequency signals, wherein one group of radio frequency signals comprises IP data, the other group of radio frequency signals comprises radio frequency signals of broadcast television services, the one group of radio frequency signals comprises IP data and is input into the tuning and demodulation function module 13, the tuning and demodulation function module 13 completes tuning and outputs a plurality of MPTS flow signals to the QAM modulation module 14, the QAM modulation module 14 demultiplexes and re-multiplexes the MPTS flow signals to form a new MPTS flow, the new MPTS flow is modulated by the QAM modulation module 14 and outputs radio frequency signals of a plurality of frequency points, and then the output radio frequency signals are mixed with the other group of radio frequency signals comprising broadcast television services output by the optical receiving module 11 in the frequency mixing module 16, forming a mixing signal and outputting the mixing signal to the radio frequency amplification module 17, wherein the radio frequency amplification module 17 converts the chaotic signal into a radio frequency signal including a cable main television signal and an IP data signal and outputs the radio frequency signal to the terminal receiver 25; the central processing CPU module 15 is connected to the QAM modulation module 14, and the central processing CPU module 15 is connected to the plurality of tuning demodulation modules 13.

The control command is resolved from the TS stream issued by the upper front end in the QAM modulation module 14, and then the operations of frequency locking and demodulation of the QAM modulation module 14, demultiplexing and remultiplexing of the multiple MPTS streams, setting of the operating parameters of the QAM modulation module 14, and modulation of the newly multiplexed multiple MPTS streams are completed according to the control command.

The CPU unit of the central processing unit sends out a control command according to the communication protocol specification, thereby completing the operation of frequency locking and setting demodulation parameters for the tuning and demodulation unit, the control of demultiplexing and multiplexing the multiple MPTS streams output by the tuning and demodulation unit inside the QAM modulation module 14, and the operation of setting parameters for the QAM modulation module 14.

Specifically, the optical wavelength division multiplexing module 10 is a DWDM module or an WDM module.

Specifically, the tuning and demodulation functional module 13 is composed of 8 to 32 functional units, and can tune and demodulate MPTS streams of multiple frequency points from an input radio frequency signal at the same time.

Specifically, the QAM modulation module 14 further includes an FPGA chip or a QAM modulation dedicated chip, and the FPGA chip or the QAM modulation dedicated chip completes input, demultiplexing, remultiplexing, and signal conversion of the QAM modulator of the multi-channel MPTS stream.

Specifically, the QAM modulation module 14 is connected to the central processing CPU module 15 through a high-speed serial interface.

Specifically, the central processing CPU module 15 is connected to the plurality of tuning demodulation modules 13 through an I2C interface.

Specifically, the QAM modulation module 14 parses communication signaling in PAT, PMT, SI, PSI, and PSIP tables defined in any frequency point and transmits the signaling to the central processing CPU module 15, and then the central processing CPU module 15 parses a control command corresponding to the data speed-raising capacity-increasing device, and the central processing CPU module 15 controls the QAM modulation module 14 according to the control command to perform demultiplexing on each path of MPTS input stream, and to re-multiplex the SPTS stream output by demultiplexing into a new MPTS stream, thereby completing the whole communication protocol process.

Specifically, the light receiving module 11 and the radio frequency amplifying module 17 are integrally disposed inside a housing of the data speed-increasing capacity-expanding device.

The above detailed description is provided for the cable broadband speed-up capacity-expansion system and the data speed-up capacity-expansion device according to the embodiments of the present invention, and a person skilled in the art may change the specific implementation manner and the application scope according to the ideas of the embodiments of the present invention.

Claims

1. A data acceleration flash device, comprising:

the device comprises a light wave decomposition multiplexing module (10), a light receiving module (11), a tuning demodulation function module (13), a QAM modulation module (14), a central processing unit CPU module (15), a frequency mixing module (16) and a radio frequency amplification module (17);

the data speed-up capacity-expanding device receives a composite optical signal, two groups of optical wave signals are separated by an optical wave demultiplexing module (10) and are transmitted to an optical receiving module (11), the optical receiving module (11) converts the optical wave signals into two groups of radio frequency signals and outputs the two groups of radio frequency signals, one group of radio frequency signals comprises IP data, the other group of radio frequency signals comprises radio frequency signals of broadcast television services, one group of radio frequency signals comprises the IP data and is input into a tuning demodulation function module (13), the tuning demodulation function module (13) completes tuning and outputs multi-path MPTS flow signals to a QAM modulation module (14), the QAM modulation module (14) performs demultiplexing and re-multiplexing on the multi-path MPTS flow signals, then a new multi-path MPTS flow is formed and is modulated by the QAM modulation module (14) and outputs a plurality of radio frequency signals, and the output radio frequency signals and the other group of radio frequency signals comprising broadcast television services output by the optical receiving module (11) are transmitted to a frequency mixing module (A) 16) The chaotic signal is mixed to form a mixed signal and then is output to a radio frequency amplification module (17), and the radio frequency amplification module (17) converts the chaotic signal into a radio frequency signal comprising a cable main television signal and an IP data signal and outputs the radio frequency signal to a terminal receiver (25); the central processing CPU module (15) is connected with the QAM modulation module (14), and the central processing CPU module (15) is connected with the plurality of tuning demodulation modules (13);

the method comprises the steps of resolving a control command from TS (transport stream) sent by a superior front end in a QAM (Quadrature amplitude modulation) modulation module (14), completing frequency locking and demodulation operations of the QAM modulation module (14) and demultiplexing and re-multiplexing operations of multi-path MPTS according to the control command, and completing setting of working parameters of the QAM modulation module (14) and completing a modulation process of the newly multiplexed multi-path MPTS;

the CPU unit of the central processing unit sends out a control command according to the communication protocol specification, thereby completing the frequency locking operation and the demodulation parameter setting operation of the tuning and demodulating unit, the demultiplexing control and the multiplexing control of the multi-path MPTS stream output by the tuning and demodulating unit in the QAM modulating module (14), and the parameter setting operation of the QAM modulating module (14).

2. The data acceleration capacity expansion device of claim 1, characterized in that, the optical wave decomposition multiplexing module (10) is a Dense Wavelength Division Multiplexing (DWDM) functional module or an optical division multiplexing (WDM) functional module.

3. The data speed-up flash device according to claim 1, wherein the tuning demodulation function module (13) is a plurality of 8-32 function units, and can tune and demodulate MPTS streams of a plurality of frequency points from an input radio frequency signal at the same time.

4. The data speed-up flash device according to claim 1, wherein the QAM modulation module (14) further comprises an FPGA chip or a QAM modulation specific chip, and the FPGA chip or the QAM modulation specific chip performs input, demultiplexing, re-multiplexing, and QAM modulator signal conversion of the multiple MPTS streams.

5. The data speed-up flash device according to claim 1, wherein the QAM modulation module (14) is connected to the central processing CPU module (15) via a high-speed serial interface.

6. The data acceleration capacity expansion device of claim 1, characterized in that, the central processing CPU module (15) is connected with a plurality of tuning demodulation modules (13) through I2C interface.

7. The data acceleration capacity expansion device of claim 1, characterized in that, the QAM modulation module (14) analyzes the communication signaling in PAT, PMT, SI, PSI and PSIP tables defined in any frequency point and transmits the communication signaling to the central processing CPU module (15), then the central processing CPU module (15) analyzes the control command corresponding to the data acceleration capacity expansion device, the central processing CPU module (15) controls the QAM modulation module (14) according to the control command to complete demultiplexing of each MPTS input stream, and multiplexes the demultiplexed SPTS stream output into a new MPTS stream again, thereby completing the whole communication protocol process.

8. The data speed-up flash device according to claim 1, wherein the light receiving module (11) and the rf amplifying module (17) are integrally disposed inside a housing of the data speed-up flash device.