CN109618412B - Novel 5G-oriented digital optical fiber distribution system and method for carrying out capacity scheduling on downlink and uplink by using same - Google Patents
Novel 5G-oriented digital optical fiber distribution system and method for carrying out capacity scheduling on downlink and uplink by using same Download PDFInfo
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- H04W72/52—Allocation or scheduling criteria for wireless resources based on load
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- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
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- H04B10/25758—Optical arrangements for wireless networks between a central unit and a single remote unit by means of an optical fibre
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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Abstract
The invention discloses a 5G-oriented novel digital optical fiber distribution system, which comprises an access module, a capacity scheduling module and a capacity covering module, wherein the access module and the capacity scheduling module can be in bidirectional communication, the capacity scheduling module and the capacity covering module can be in bidirectional communication, and the access module is used for accessing an information source signal to process and then outputting the information source signal to the capacity scheduling module; the capacity scheduling module is used for performing capacity scheduling processing on the received uplink signal or downlink signal according to the capacity coverage switch, generating a scheduled signal and outputting the scheduled signal to the capacity coverage module or the access module; and the capacity covering module is used for processing the uplink signal received from the terminal equipment and then outputting the processed uplink signal to the capacity scheduling module, or processing the downlink data received by the capacity scheduling module and then outputting the processed downlink data to the terminal equipment. The invention also provides a method for scheduling the capacity by using the system, and the system and the method can realize the intelligent distribution of the system capacity and support the smooth evolution facing 5G.
Description
Technical Field
The invention relates to the technical field of network communication, in particular to a novel 5G-oriented digital optical fiber distribution system, and also relates to a method for carrying out capacity scheduling on a downlink and an uplink by the novel 5G-oriented digital optical fiber distribution system.
Background
In the traditional 2G/3G era, mobile communication works in a low frequency band, covering indoor with outdoor macro-station signals and building a traditional indoor distributed DAS (distributed Antenna System) System are effective solutions for solving indoor coverage. In the 4G era, this approach was still mainstream. However, with the commercial use of 5G, the newly added frequency band is basically at 2.6GHz and above, and the frequency band becomes higher and higher. According to the current 5G authorized frequency band in China, china mobile obtains a 2.6GHz 160M bandwidth spectrum, china telecom and China Unicom respectively obtain a 3.5GHz 100M bandwidth spectrum, and radio and television respectively obtain a 4.9GHz 50M bandwidth spectrum.
In combination with the current indoor distribution experience, the traditional approach of "outdoor over indoor" will face many challenges after the introduction of high frequency. Besides the problems of engineering construction difficulty, network equipment visual monitoring and the like in a new network environment, the loss of a traditional passive device to a high frequency band is very large, and the traditional passive device is difficult to avoid.
Besides the problem of high band loss, in practical applications, many problems to be solved in the existing indoor distribution system exist. For example, a small base station policy-based indoor distribution system is provided in the patent "CN105848170A indoor distribution system", and although the indoor distribution system has the advantage of easier monitoring of network nodes compared with the conventional indoor distribution system, the disadvantages thereof are also obvious: 1) The network access system can only support access of a part of frequency bands and does not support access of a 2G/3G/4G full-frequency band network; 2) It supports only 2 x 2mimo; 3) The light distribution unit only supports baseband data access, and the existing stock room subsystem cannot carry out radio frequency signal access and cannot be used for the old; 4) The 5G access is not supported; 5) And the expansion unit does not have a capacity scheduling function.
The patent CN106454560A discloses a multi-service digital light distribution system and a multi-service capacity scheduling method, which adopts a radio frequency independent scheme, but increases the system size and cost, and has a typical 2-level architecture in the architecture, which cannot meet the product expansion requirement of the future 5G. In addition, the related capacity scheduling algorithm has disadvantages in implementation, and performs data source and downlink channel on-off control by using uplink data, and if the downlink channel is closed once, the downlink channel can never be automatically opened, thereby losing the purpose of capacity adjustment.
Disclosure of Invention
In order to overcome the defects of the prior art and adapt to the advance of the 5G technology, the inventor conceives that the capacity scheduling unit (CDU) is used for intelligently allocating the system capacity, and the access equipment is compatible with a base station RF interface, a data interface and a baseband communication protocol interface, and the cascaded optical interface rate can be adaptively adjusted, so as to support the access of full-band 2G/3G/4G signals and multiple 5G signals, and realize the expansion of 5G applications by fully utilizing old equipment.
Based on this, in a first aspect, the embodiments of the present invention provide a novel 5G-oriented digital optical fiber distribution system, including an access module, a capacity scheduling module, and a capacity covering module, wherein,
the access module and the capacity scheduling module can communicate in two directions, the capacity scheduling module and the capacity covering module can communicate in two directions,
the access module is used for accessing the information source signal for processing and then outputting the information source signal to the capacity scheduling module; or receiving the uplink signal of the capacity scheduling module, processing and outputting the uplink signal;
the capacity scheduling module is used for performing capacity scheduling processing on the received uplink signal or downlink signal according to the capacity coverage switch, generating a scheduled signal and outputting the scheduled signal to the capacity coverage module or the access module;
the capacity covering module is used for processing the uplink signal received from the terminal equipment and outputting the processed uplink signal to the capacity scheduling module; or the data received by the capacity scheduling module is processed and then output to the terminal equipment.
In a second aspect, an embodiment of the present invention further provides a method for capacity scheduling of a downlink by using a novel 5G-oriented digital optical fiber distribution system, including
The access module carries out merging and framing processing on the information source signals received from the base station RF interface, the data interface and the baseband communication protocol interface, converts the information source signals into optical signals through the digital optical module, and outputs the optical signals to the capacity scheduling module through optical fibers;
the capacity scheduling module performs de-framing processing on the received optical signals, turns off signals of each frequency band obtained after de-framing according to a capacity covering switch, frames the channel frequency band data and the transparent transmission data after being turned off, and outputs baseband data to the capacity covering module through a cascade optical/network interface;
the capacity covering module analyzes the received baseband data to obtain transparent transmission data and service data, the transparent transmission data is output through a data interface, and the service data is output through an antenna after radio frequency conversion, amplification and multiplexer combination processing.
Meanwhile, in a third aspect, an embodiment of the present invention further provides a method for performing capacity scheduling on an uplink by using a novel 5G-oriented digital optical fiber distribution system, including
The capacity covering module performs framing processing on the received uplink radio frequency signal and the transparent transmission signal to obtain baseband data, and the baseband data is output to the capacity scheduling module through the cascade optical/network interface;
the capacity scheduling module performs de-framing processing on the received baseband data, turns off signals of each frequency band obtained after de-framing according to the capacity coverage switch and the uplink capacity, frames the channel frequency band data and the transparent transmission data after being turned off, and outputs optical signals to the access module through the cascade optical/network interface;
the access module performs de-framing processing on the received optical signal and outputs the optical signal through a base station RF interface, a data interface or a baseband communication protocol interface.
The system and the method provided by the invention can realize the intelligent distribution of the capacity of the system, save the operation cost investment and release the data transmission bandwidth on the basis of ensuring the coverage effect of an operator.
Drawings
FIG. 1 is a schematic block diagram of a 5G-oriented novel digital optical fiber distribution system according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of an access module of a 5G-oriented novel digital optical fiber distribution system according to another embodiment of the present invention;
fig. 3 is a schematic block diagram of a capacity scheduling module of the 5G-oriented novel digital optical fiber distribution system according to an embodiment of the present invention;
FIG. 4 is a schematic block diagram of a capacity coverage module of a 5G-oriented new digital fiber distribution system according to another embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for performing downlink capacity control by using a 5G-oriented new digital optical fiber distribution system according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating a capacity scheduling method in the method shown in fig. 5.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 schematically shows a schematic block diagram of a structure of a 5G-oriented novel digital optical fiber distribution system according to an embodiment of the present invention, as shown in fig. 1,
the novel 5G-oriented digital optical fiber distribution system comprises an access module 1, a capacity scheduling module 2 and a capacity covering module 3, wherein the access module 1 and the capacity scheduling module 2 can be in two-way communication, and the capacity scheduling module 2 and the capacity covering module 3 can be in two-way communication. The access module 1 and the capacity scheduling module 2 communicate based on an optical fiber transmission protocol, the capacity scheduling module 2 and the capacity covering module 3 communicate based on an optical fiber transmission protocol or a network cable transmission protocol, so that the indoor distribution network is built and distributed through optical fibers or network cables, passive devices such as a feeder line and a power divider are replaced, and the problem of high-frequency transmission loss of a traditional indoor distribution system can be effectively solved.
In the downlink, the access module 1 is configured to complete access of an information source signal, receive the information source signal for processing, and output downlink data to the capacity scheduling module 2. The capacity scheduling module 2 is configured to perform capacity scheduling, perform capacity scheduling processing on the received downlink data according to the capacity coverage switch, generate scheduled downlink data, and output the scheduled downlink data to the capacity coverage module 3. The capacity covering module 3 is configured to implement signal covering, process the downlink data received from the capacity scheduling module, and output the downlink data to the terminal device.
In the uplink, the capacity covering module 3 is configured to process an uplink signal received from the terminal device and output uplink data to the capacity scheduling module 2. The capacity scheduling module 2 is configured to perform capacity scheduling processing on the received uplink data according to the capacity coverage switch, and generate scheduled uplink data and output the scheduled uplink data to the access module 1. The access module 1 is used for receiving the uplink data of the capacity scheduling module 2, processing the uplink data and outputting the processed uplink data to the base station.
Specifically, as a preferred embodiment, as shown in fig. 2, the access module 1 is implemented to include a base station RF interface (not shown), a radio frequency sampling unit 101, and a signal processing unit 103, where the signal processing unit 103 includes a high-speed interface 1032 for performing data interaction with the radio frequency sampling unit 101 based on a high-speed interface protocol, a baseband communication protocol interface 1034 for performing baseband data interaction with a base station based on an optical fiber transmission protocol, a cascade optical port 1033 for communicating with the capacity scheduling module 2, a data interface 1031 for performing data transparent transmission signal interaction based on a data dialysis protocol, and a main processing unit 101 for performing data processing. In a downlink, a base station RF interface receives a base station radio frequency signal coupled through a coupler, outputs the base station radio frequency signal to the radio frequency sampling unit 101, converts the radio frequency signal into a digital baseband signal after being processed by the radio frequency sampling unit 101, and outputs the digital baseband signal to a high-speed interface 1032; the main processing unit 102 is configured to perform framing on a baseband digital signal output by the high-speed interface 1032, a baseband signal received by the baseband communication protocol interface 1034, and a data transparent transmission signal received by the data interface 1031 based on an optical fiber transmission protocol, generate an optical fiber protocol signal (i.e., uplink data), and output the optical fiber protocol signal (i.e., uplink data) to the capacity scheduling module 2 via the cascaded optical port 1033.
Since the access module 1 includes the base station RF interface and the radio frequency sampling unit 101, and the signal processing unit 103 includes the baseband communication protocol interface 1034 and the data interface 1031, the accessed source signal can be implemented as one or a combination of two or more of a base station radio frequency signal coupled by a coupler, baseband data interacted with the base station by an optical fiber transmission protocol, and a capacity-expanded baseband signal acquired from the access module by cascading (by directly connecting the access module 1 to the slave access module via an optical fiber, that is, by receiving the capacity-expanded baseband signal from the access module from the baseband communication protocol interface 1034 based on the optical fiber transmission protocol), so that the system of the embodiment of the present invention can support access of full-band 2G/3G/4G signals and multiple paths of 5G signals, and achieve a fully-used effect.
The data transmission rate of the cascade optical port 1033 can be adjusted to 10Gbps or 40Gbps, so as to ensure the compatibility of the system.
As a specific implementation example, the access module 1 may directly interact baseband data with the base station through an optical fiber, or may perform access to an information source through a Radio frequency signal of a coupling base station RRU (Radio Remote Unit), where after the Radio frequency signal enters the access module 1, the Radio frequency signal directly completes conversion from a Radio frequency to a baseband digital signal through a Radio frequency sampling link, and finally, the access module 1 performs framing on the baseband data of a service (including the baseband digital signal obtained by coupling access and the baseband data obtained by base station interaction) and transparent transmission data received by the data interface, such as WIFI data, according to an optical fiber protocol, and sends the frame to the capacity scheduling module 2 through an optical fiber. By adopting the radio frequency sampling technology, the problems of cost and size caused by the introduction of a separation element can be reduced.
In a preferred embodiment, before framing and outputting the data, the main processing unit also performs main service function control such as power statistics, peak/average value control, cell splitting, power amplifier protection and the like on the data.
Specifically, as a preferred embodiment, as shown in fig. 3, the capacity scheduling module 2 is implemented to include a main optical port 201 for communicating with the access module 1, an extension optical port 202 for communicating with the slave capacity scheduling module, a cascade optical/network port 203 for communicating with the capacity covering module 3, and a scheduling processing unit 204 for performing capacity scheduling processing.
The main optical port comprises a 10G main optical port and a 40G main optical port which are respectively connected with a traditional 2G/3G/4G channel and a 5G large-bandwidth multi-channel MIMO link. The data transmission rate of the cascaded optical/network interface 203 is set to 10Gbps or 40Gbps, so that the data transmission rate between the capacity scheduling module 2 and the capacity covering module 3 can be switched between 10Gbps and 40Gbps, wherein the data transmission rate can be selected according to the data capacity of the uplink and downlink. The capacity scheduling module 2 has a frequency band scheduling function, and can adapt and adjust the data transmission rate of the optical fiber or the network cable to 10Gbps or 40Gbps according to the capacity scheduling result, so that the effects of reducing the optical fiber transmission pressure between the capacity scheduling module 2 and the capacity covering module 3 and reducing the construction cost of the capacity covering module can be achieved, and the compatibility of the system can be improved by adapting and adjusting the data transmission rate. Illustratively, adapting the data transmission rate of the optical fiber or the network cable may be achieved by:
the method is realized in a soft switching mode, and in concrete implementation, each frequency band corresponds to one block on a transmission protocol, and each block corresponds to one sampling rate, so that the sampling rate of the transmission frequency band can be counted and judged, when the sampling rates of the transmission frequency band are added together and are less than 10GSPS, the transmission frequency band can be switched to a 10G transmission protocol, and when the sampling rates of the transmission frequency band are more than 10GSPS, the transmission frequency band can be switched to a 40G transmission protocol;
the second mode is realized by a hard switching mode, for example, a part of frequency bands can be directly closed by an external switch, so that a 10G main optical port or a 40G main optical port is directly adopted for data transmission in actual network application.
The scheduling processing unit 204 is implemented to implement capacity scheduling by performing band on-off control on the received uplink data or downlink data according to the capacity coverage switch. The capacity covering switch comprises a first covering switch, and the first covering switch is set by the capacity scheduling module according to the received configuration parameters. Exemplarily, receiving the configuration parameter is implemented by receiving a frequency band allocation instruction of the system, where the frequency band allocation instruction is originated from a monitoring background, and performing capacity parameter configuration according to an actual communication capacity coverage condition, for example: the traffic volume of a working day of a certain business center is smaller, and the traffic volume of a weekend or evening period is more peak, under the condition, parameter setting of capacity scheduling can be carried out on the monitoring background, so that the first coverage switch is set according to the set configuration parameters, exemplarily, if the traffic volume of a certain frequency band is smaller, the current frequency band can be configured through a system without working, according to the parameter which is configured by the system and does not need to work, the first coverage switch can be set to be a turn-off mark such as '0', if the traffic volume of a certain time band or a frequency band is more, the frequency band or the time band can be set to be the current frequency band to work, so that the first coverage switch is set to be a turn-on mark such as '1', then a capacity scheduling module can carry out on-off scheduling of the frequency band according to the first coverage switch, so as to ensure the coverage effect of an operator, and can save the operation cost input from busy resource allocation on the aspect of operation and maintenance. The second overlay switch is updated in real time by the capacity scheduling module according to the capacity of the received uplink signal, and a second overlay switch identifier, which is an identifier indicating whether the second overlay switch is effective or not, is generated correspondingly, illustratively, the capacity overlay module obtains an uplink traffic statistic indicator per frequency according to uplink traffic statistics, and the traffic statistic indicator includes two types: one is that the monitoring background is configured in the capacity covering module, and the other is that the capacity covering module counts the feedback of the uplink power for a period of time. And reporting the uplink traffic statistic mark as uplink capacity to a capacity scheduling module through a cascade port, and carrying out data selection control by the capacity scheduling module according to the uplink capacity. The capacity covering module performs the setting of the uplink traffic statistic indication by counting the uplink power for a period of time, and the uplink power can be directly used as the uplink capacity to be output to the capacity scheduling module. When receiving the uplink capacity, the capacity scheduling module performs corresponding scheduling processing in combination with the uplink capacity according to a judgment result of the first coverage switch, for example, the following is implemented: if the first coverage switch is turned off, that is, there is no traffic in a period of time, the current frequency band may not work, otherwise, the work is still a waste of resources, and the corresponding data in the frequency band in the cascaded optical/network port does not need to be transmitted, and the data transmission bandwidth of the optical fiber or the network cable is released, so as to close or open the transmission channel of the current frequency band, thereby completing the capacity scheduling and allocation of the system. The specific capacity scheduling processing method can be described in more detail in the methods section below.
In addition, under the three-level network architecture, each optical port of the capacity scheduling module is only correspondingly connected with one capacity coverage module, so that the data of each optical port is actually equivalent to the corresponding capacity coverage module, and if the corresponding optical port (i.e., the corresponding frequency band) is closed at the capacity scheduling module, the data cannot be received at the capacity coverage module, so that during capacity scheduling control, capacity scheduling processing can be performed only at the capacity scheduling module according to a capacity coverage switch, and a specific scheduling processing method can also refer to the description of the method part below. In other implementation examples, the capacity scheduling control, that is, the frequency band on-off processing, may be performed in the capacity scheduling module and the capacity coverage module at the same time, and the frequency band on-off control performed in the capacity coverage module may be performed based on a value of the second coverage switch to turn off or turn on the frequency band.
According to this embodiment, the capacity scheduling module 2 performs deframing processing on the received optical signal, turns off the signals of each frequency band obtained after deframing according to the capacity coverage switch, frames the data of the channel frequency band (i.e., the data of the remaining frequency band after turning off) and the transparent transmission data after turning off according to the cascade transmission protocol again, and outputs baseband data to the capacity coverage module through the cascade optical or network interface, so that the intelligent scheduling task allocation of the system can be adaptively completed, and the problem of poor coverage effect caused by uneven capacity scheduling under some peak value conditions is effectively solved.
Specifically, as a preferred embodiment, as shown in fig. 4, the capacity coverage module 3 includes a cascaded optical/network interface 301 for communicating with the capacity scheduling module 2, a data interface 302 for performing data transparent transmission signal interaction based on a data transparent transmission protocol, a high-speed interface 303 for communicating with a radio frequency sampling unit, a radio frequency sampling unit 304 for performing signal conversion, an amplifying unit 305 for performing signal amplification processing, a multiplexing combiner 306, an antenna 307, and a signal processing unit.
The capacity covering module analyzes and processes the received baseband data to obtain transparent transmission data and service data, the transparent transmission data is output through a data interface, and the service data is output through an antenna after radio frequency conversion, amplification and multiplexer combination processing.
Specifically, after the baseband data output by the capacity scheduling module 2 enters the capacity covering module 3 through the cascaded optical/internet interface 301, the signal processing unit may analyze and separate the baseband data according to the data transmission protocol to obtain service data and transparent transmission data, output the transparent transmission data through the data interface 302, and output the service data to the radio frequency sampling unit through the high-speed interface 303. The transparent transmission data are output through the data interface, the establishment of a data transparent transmission channel from the capacity coverage module side to the capacity scheduling module side is achieved, and the data access requirements of high-definition videos, WIFI and the like are met.
In the preferred embodiment, before outputting the service data through the high-speed interface 303, the signal processing unit also performs main service function control such as power statistics, peak/average control, cell splitting, power amplifier protection, and the like on the service data.
After the service data enters the high-speed interface 303, framing of the data is performed according to the interface protocol of the radio frequency sampling chip according to the high-speed interface protocol, and the framed data is output to the radio frequency sampling unit. The radio frequency sampling unit completes an up-conversion process on the data, so that the conversion of the data radio frequency is realized, the original frequency band is restored to the original frequency band and is output to the amplifying unit 305, and the amplifying unit 305 performs uplink and downlink power amplification on the radio frequency signal, so that the signal amplification is realized. The amplified radio frequency signals enter the multiplexer 306 according to the corresponding frequency band interface, and the data combined by the multiplexer is output to the external antenna 307 or the internal antenna 307, so as to realize the final coverage of the network.
In a specific implementation, the amplifying unit includes a downstream amplifier and an upstream amplifier. The downstream amplifier mainly plays a role of power linear amplification, and the existing analog predistortion or digital predistortion technology can be adopted, but the downstream amplifier is not limited to the power amplifier of the technology. The uplink amplifier is mainly a low-noise amplifier, so that effective extraction and amplification of signals are realized, the system sensitivity is improved, and the like. The multiplexing combiner 306 may be implemented to support four ways to enable support for 4 x 4mimo, but is not limited to this number. The antenna 307 is integrated in the capacity coverage module 3, and may be integrated as an external antenna or an internal antenna, and may be exemplarily implemented to support 4 × 4mimo through an external ceiling antenna, and may also be embedded in the antenna in a 2 × 2mimo state. By the integrated antenna, radio frequency wiring of hundreds of meters frequently under the condition of indoor division is avoided, the problem of high-frequency transmission loss can be further solved, and the capacity coverage module can be applied to various scenes, such as the application occasions in office places and the indoor positioning technology can be carried out; the underground parking lot can carry out indoor positioning, intelligent parking lot business and the like; the business center can perform indoor positioning, big data analysis, intelligent pushing and the like. Therefore, one-time network building and multi-service platform sharing can be realized.
Because the capacity coverage module is the last stage covered by the system, it can obtain uplink and downlink service data of each frequency band, and usually, the uplink data is data uploaded to the base station by the mobile phone terminal and represents the capacity. Therefore, in practical applications, the capacity can be determined by counting the power of the uplink data, so that the capacity scheduling module can implement capacity scheduling according to the capacity (for example, by notifying in the uplink capacity manner, see the above description), and thus, adaptive intelligent capacity allocation can be implemented. The specific implementation method for the capacity coverage module to count the uplink data may be different according to different manufacturers, and is not specifically limited herein, and may be exemplarily implemented to count the average power of the uplink data within a period of time.
Fig. 5 schematically shows a flow chart of a method for capacity scheduling of a link using a 5G-oriented novel digital optical fiber distribution system. As shown in fig. 5, the present embodiment includes the following steps:
step S501: the access module carries out merging and framing processing on the information source signals received from the base station RF interface, the data interface and the baseband communication protocol interface, converts the information source signals into optical signals through the digital optical module, and outputs the optical signals to the capacity scheduling module through the optical fiber. The main service data source of the access module mainly has three aspects:
(1) The method comprises the steps that a base station radio-frequency signal is directly coupled through a coupler, the radio-frequency signal is converted into a digital baseband signal after being processed by a radio-frequency sampling unit, wherein the frequency band configuration of a radio-frequency sampling circuit is subjected to software configuration according to a butt-joint frequency band by a monitoring processing unit (an access module of the system comprises the monitoring processing unit for configuring and managing equipment parameters, the monitoring processing unit can be realized by referring to the monitoring processing unit in the prior art, and the repeated description is omitted in the invention), the access frequency band can meet the frequency band setting from 300MHz to 6GHz, the number of access channels is N, and the value can be 1-12, but the method is not limited to the range;
(2) Performing baseband data interaction with a base station through an access optical fiber transmission protocol to complete system access of information source signals of corresponding frequency bands, wherein the number of access channels is M, and the value can be 1-4, but is not limited to the range;
(3) The access optical fiber transmission protocol of the CAU can also be configured to be in butt joint with another slave CAU, so that the capacity expansion of a base station of a signal is realized, the access of a baseband signal of a frequency band missing by the main CAU at the current stage is realized, the number of access channels is the same as (2), but the transmission rate is adjusted according to the requirement;
when the mode (1) is adopted as the information source signal, the transmission medium is a feeder line. When the modes (2) and (3) are adopted as the source signal, the transmission medium is an optical fiber.
After receiving the data in the mode (1), the high-speed interface analyzes the data in the mode (1) through a high-speed interface protocol to recover system link service data of each channel, performs signal processing such as peak/average value control, gain adjustment, power detection and the like on the recovered digital baseband signals of each channel, combines the baseband data subjected to digital signal processing and the digital signals from the data interface and recovered through a data transparent transmission protocol, performs optical fiber transmission protocol framing, converts the baseband data into a high-speed serial baseband signal, converts the high-speed serial baseband signal into an optical signal through a digital optical module, and transmits the optical signal through an optical fiber. The signal rate from the data interface may be hundreds of megabytes, gigabytes, or tens of megabytes (as adjusted by the system), and the signal may be a communication signal such as WIFI, high definition video data, or the like. The number of data interfaces is 1 in the embodiment of the present invention, but is not limited to this number. The framing data rate of the optical fiber transmission protocol can be adjusted according to the actual needs of the system, the adjustment mode can be a statistical result according to the sampling rate of the frequency band, and the sampling rate is exemplarily selected to be 40Gbps, but is not limited to the rate; the value of the transmission channel S is 1-8, but not limited to the range; the specific framing can be realized by adopting a special chip or a field programmable logic device (FPGA) or a DSP. In addition, the digital signal in the signal processing unit may be a signal in any one of the three manners (1), (2), and (3), or a signal obtained by any combination thereof.
After framing, an optical fiber signal is obtained and transmitted to an optical fiber port (namely a main optical port) of the capacity scheduling module through a long-distance optical fiber; in specific implementation, the distance can be 1km, 5km, 10km, 20km and the like according to requirements. The present invention uses 1km, but is not limited to this kilometer number.
Step S502: the capacity scheduling module is used for performing frame decoding processing on the received optical signals, performing shutdown processing on signals of each frequency band obtained after frame decoding according to the capacity coverage switch, framing the channel frequency band data subjected to shutdown processing and the transparent transmission data, and outputting baseband data to the capacity coverage module through the cascade optical/network interface. The concrete implementation is as follows: for the acquired optical signal (entering the capacity scheduling module through the main optical port), the framing signal is deframed through a main optical fiber transmission protocol to obtain a baseband digital signal and a data transparent transmission signal. Illustratively, the number of main optical ports is P, the value range is 1-2, and the transmission rate is 40Gbps. The signal entering the capacity scheduling module has two output directions:
the first direction is that, according to the capacity coverage switch, one or several frequency band data is turned off to realize the purpose of capacity scheduling, after the turning-off process is carried out, the remaining frequency band data and the transparent transmission data are framed again according to the cascade transmission protocol and then output through the cascade optical port or the network port, wherein the quantity of the output cascade optical/network port is T, and the range is 1-16, but not limited to the range.
In the second direction, the baseband data demodulated by the main optical port is directly output to the next cascaded capacity scheduling module through the extended optical port, so as to achieve the purpose of cascading the capacity scheduling modules, and the capacity scheduling modules can be cascaded in 4 stages in a chain manner, and expanded in 4 stages in a star manner, but are not limited to the stage and the number of the stages.
The output direction of the signal entering the capacity scheduling module can be implemented by dividing the interfaces of the capacity scheduling module into two groups, wherein one group is a cascade optical/network interface; the other group is an extended optical/network port; the roles of the two groups are set as: the cascade optical/network interface is set to be communicated with the capacity covering module, the expansion optical/network interface is set to be communicated with the capacity scheduling module, when data are output, whether the data are sent to the capacity covering module or the capacity scheduling module is judged according to the zone bit in the data, and the data are output to the corresponding interface according to the judgment result, wherein the zone bit can be set according to the requirement, and the corresponding analysis judgment can be carried out when the data are received.
Step S503: the capacity covering module analyzes and processes the received baseband data to obtain transparent transmission data and service data, the transparent transmission data is output through a data interface, and the service data is output through an antenna after radio frequency conversion, amplification and multiplexer combination processing. The concrete implementation is as follows: the baseband data processed by the capacity scheduling module enters the capacity covering module through the cascaded optical/network ports, the quantity of the cascaded optical/network ports is R, the value of the cascaded optical/network ports is 1-2, and the data rate is adapted to 10Gbps or 40Gbps, but not limited to the range. The capacity coverage module analyzes and separates the service baseband data and the transparent transmission data through a data transmission protocol, wherein the transparent transmission data is output through a data interface, and a data transparent transmission channel is established for meeting the data access of high-definition video, WIFI and the like; the service data enters the signal processing unit to perform main service function control such as power statistics, peak/average value control, cell splitting, power amplifier protection and the like. And then outputting the service data to a high-speed interface, framing the service data according to an interface protocol of a radio frequency sampling chip according to the high-speed interface protocol, and outputting the framed service data to a radio frequency sampling unit, wherein the radio frequency sampling unit completes an up-conversion process on the data to realize the conversion of data radio frequency, and restores the original frequency band to output. And inputting the obtained radio frequency signals into an uplink and downlink power amplification unit to realize the amplification of the signals. And for the amplified radio frequency signals, the amplified radio frequency signals enter the multiplex combiner through the corresponding frequency band interface, and the data combined by the multiplexer is output to an external antenna or an internal antenna to realize the final coverage of the network.
The above steps S501 to S503 are the downlink data flow and operation process from the base station to the ue, and for the uplink direction, the operation process from the mobile phone terminal to the base station is similar to the above steps, so the description is omitted, but the technical principle and the framework protection are also valid.
For the switch covered by capacity in step S502, the process of turning off the signals of each frequency band obtained after the frame decoding may be implemented as shown in fig. 6:
step S5021: and sequentially acquiring the signals of each frequency band, and performing the processing of the following steps S5022 to S602 until the signals of all the frequency bands are processed. The signals of each frequency band are baseband digital signals of all frequency bands obtained by frame decoding.
Step S5022: and acquiring a first coverage switch of the current cascade optical/network interface for judgment. The first overlay switch is manually set by the system monitoring background according to the local area networking requirements, for example, corresponding parameters are set through a user interface, the capacity scheduling module performs on-off processing on the first overlay switch according to the set parameters, and the set parameters can be used as marks of whether the first overlay switch takes effect or not so as to facilitate judgment.
Step S5023: when the first covering switch is not turned on (namely, when the first covering switch is a turn-off identifier), setting gains of an uplink channel and a downlink channel of the current cascade optical/network port to zero, and turning off a transmission channel of the current cascade optical/network port data for the current frequency band.
Step S5024: when the first coverage switch is turned on, the acquired uplink capacity is compared with a preset capacity threshold, and step S5041, step S5042, or step S5043 is performed according to the comparison result. The capacity threshold comprises a low threshold and a high threshold, and can be manually set through a monitoring background according to requirements, the uplink capacity can be obtained through a capacity covering module, or the uplink capacity can be obtained through a capacity scheduling module by performing real-time power statistics according to uplink data.
Step S5041: when the uplink capacity is smaller than the capacity low threshold, setting the uplink channel gain of the current cascade optical/network interface to zero, and shutting off the transmission channel of the current cascade optical/network interface data for the current frequency band, so as to avoid resource waste.
Step S5042: when the uplink capacity is larger than the capacity high threshold, setting gains of uplink and downlink channels of other cascade optical/network ports of the current frequency band to zero, turning off other cascade optical/network ports of the current frequency band, only starting a transmission channel of the current cascade optical/network port for the current frequency band, namely starting a second covering switch of the current cascade optical/network port, and setting the identifier of the second covering switch of the current cascade optical/network port to zero so as to identify the state of effectiveness or non-effectiveness of the second covering switch. Therefore, when the uplink capacity of the current frequency band is too large, other cascaded optical/network ports can be shut off, so that other optical/network ports can be used for transmitting other types of signals, for example, signals of different systems (such as 5G signals) can be transmitted, and thus, the dynamic adjustment of data transmission rates of different frequency bands can be realized, and the maximum utilization rate of optical/network port resources can be realized.
Step S5043: when the uplink capacity is between the capacity low threshold and the capacity high threshold, determining whether a second overlay switch of the current cascade optical/network interface is turned on, specifically, determining whether a second overlay switch identifier is zero, and executing step S601 or step S602 according to the determination result.
Step S601: when the second cover switch mark of the current cascade optical/network port is zero, setting the second cover switch mark of the current cascade optical/network port as one, starting the second cover switch of the current cascade optical/network port, setting the uplink channel gain of the current cascade optical/network port of the current frequency band as one, setting the uplink and downlink channel gains of other cascade optical/network ports of the current frequency band as one, and starting other cascade optical/network ports of the current frequency band; in the uplink, the combined and cascaded optical/network port uplink service data is transmitted upwards, and in the downlink, the combined and cascaded optical/network port downlink service data is transmitted downwards.
Step S602: when the second covering switch mark of the current cascade optical/network interface is non-zero, the uplink channel gain of the current cascade optical/network interface is set to be one, in the uplink, the uplink service data of the combined cascade optical interface is transmitted upwards, and in the downlink, the downlink data of the combined cascade optical/network interface is transmitted downwards.
Therefore, dynamic adjustment of the frequency band data transmission rate can be achieved according to the uplink capacity, the resource utilization rate is improved, the downlink channels of other cascaded optical/network ports of the current frequency band are turned off only when the uplink capacity is larger than the capacity high threshold under the condition that the first covering switch is turned on, the turned-off downlink channels can be dynamically turned on according to the capacity scheduling requirement when the uplink capacity is between the capacity low threshold and the capacity high threshold, the capacity scheduling strategy can reasonably carry out dynamic scheduling, and the defect that the channels cannot be turned on for data transmission due to unreasonable scheduling is avoided.
According to the embodiment, the functions of capacity statistics and cell splitting can be supported, the coverage capability of the cell at the current level can be intelligently controlled, and the smooth evolution facing 5G can be supported through the capacity scheduling module and the capacity coverage module, that is, various technologies, media, carriers and the like can be maximally compatible.
What has been described above are merely some of the embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The novel 5G-oriented digital optical fiber distribution system is characterized by comprising an access module, a capacity scheduling module and a capacity covering module, wherein,
the access module is capable of two-way communication with a capacity scheduling module, the capacity scheduling module is capable of two-way communication with the capacity coverage module,
the access module is used for accessing the information source signal for processing and then outputting the information source signal to the capacity scheduling module; or receiving the uplink data output by the capacity scheduling module, processing and outputting the uplink data;
the capacity scheduling module is used for performing capacity scheduling processing on the received uplink data or downlink data according to the capacity coverage switch, and generating scheduled data to be output to the capacity coverage module or the access module;
the capacity covering module is used for processing the uplink signal received from the terminal equipment and outputting the processed uplink signal to the capacity scheduling module; or the downlink data received by the capacity scheduling module is processed and then output to the terminal equipment;
the access module carries out merging and framing processing on the information source signals received from the base station RF interface, the data interface and the baseband communication protocol interface, converts the information source signals into optical signals through the digital optical module, and outputs the optical signals to the capacity scheduling module through optical fibers;
the capacity scheduling module performs de-framing processing on the received optical signals, turns off signals of each frequency band obtained after de-framing according to a capacity covering switch, frames the channel frequency band data and the transparent transmission data after being turned off, and outputs baseband data to the capacity covering module through a cascade optical/network interface;
the capacity covering module analyzes and processes the received baseband data to obtain transparent transmission data and service data, the transparent transmission data is output through a data interface, and the service data is output through an antenna after radio frequency conversion, amplification and multiplexer combination processing;
the capacity covering module performs framing processing on the received uplink radio frequency signal and the transparent transmission signal to obtain baseband data, and outputs the baseband data to the capacity scheduling module through the cascade optical/network interface;
the capacity scheduling module is used for performing unframing processing on received baseband data, performing turn-off processing on signals of each frequency band obtained after unframing according to a capacity coverage switch and real-time uplink capacity obtained through statistics, framing the channel frequency band data subjected to turn-off processing and transparent transmission data, and outputting optical signals to the access module through the cascade optical/network interface;
the access module performs deframing processing on the received optical signal and outputs the optical signal through a base station RF interface, a data interface or a baseband communication protocol interface.
2. The system of claim 1, wherein the accessed source signal comprises one or a combination of more than two of a coupler coupled base station radio frequency signal received through a base station RF interface, base band data received through a base band communication protocol interface and interacting with a base station via a fiber optic transport protocol, a cascaded slave access module capacity-expanded base band signal received through a base band communication protocol interface, and a data transparent transmission signal received through a data interface.
3. The system of claim 2, wherein the access module and the capacity scheduling module communicate based on a fiber optic transmission protocol, and the capacity scheduling module and the capacity coverage module communicate based on a fiber optic transmission protocol or a network cable transmission protocol.
4. The system of claim 3, wherein the capacity scheduling module comprises a main optical port for communicating with an access module, the main optical port comprising a 10G main optical port and a 40G main optical port;
the data transmission rate between the access module and the capacity scheduling module and the data transmission rate between the capacity scheduling module and the capacity covering module can be switched between 10Gbps and 40Gbps.
5. The system of any of claims 1 to 4, wherein the capacity overlay switch comprises a first overlay switch and a second overlay switch,
the first coverage switch is set by the capacity scheduling module according to the received configuration parameters;
and the second coverage switch is controlled by the capacity scheduling module according to the real-time uplink capacity.
6. The system of claim 5, wherein the capacity scheduling module further comprises an extended optical port for communicating with a cascaded capacity scheduling module.
7. The system of claim 5, wherein the capacity coverage module is integrated with an external antenna or an internal antenna.
8. The system of claim 5, wherein the access module and the capacity coverage module each comprise a radio frequency sampling unit for sampling a radio frequency signal.
9. Method for capacity scheduling using a system according to any of claims 1 to 8, characterized in that in the uplink the method comprises
The access module carries out merging and framing processing on the information source signals received from the base station RF interface, the data interface and the baseband communication protocol interface, converts the information source signals into optical signals through the digital optical module, and outputs the optical signals to the capacity scheduling module through optical fibers;
the capacity scheduling module performs de-framing processing on the received optical signals, turns off signals of each frequency band obtained after de-framing according to a capacity covering switch, frames the channel frequency band data and the transparent transmission data after being turned off, and outputs baseband data to the capacity covering module through a cascade optical/network interface;
the capacity covering module analyzes and processes the received baseband data to obtain transparent transmission data and service data, the transparent transmission data is output through a data interface, and the service data is output through an antenna after radio frequency conversion, amplification and multiplexer combination processing;
in the downlink, the method comprises
The capacity covering module performs framing processing on the received uplink radio frequency signal and the transparent transmission signal to obtain baseband data, and outputs the baseband data to the capacity scheduling module through the cascade optical/network interface;
the capacity scheduling module performs de-framing processing on the received baseband data, turns off signals of each frequency band obtained after de-framing according to a capacity coverage switch and the real-time uplink capacity obtained through statistics, frames the channel frequency band data subjected to the off-framing processing and the transparent transmission data, and outputs optical signals to the access module through the cascade optical/network interface;
the access module performs de-framing processing on the received optical signal and outputs the optical signal through a base station RF interface, a data interface or a baseband communication protocol interface.
10. The method of claim 9, wherein the capacity scheduling module turns off the signals of each frequency band obtained after the deframing according to the capacity coverage switch and the uplink capacity includes sequentially acquiring the signals of each frequency band for each cascaded optical/network port to perform the following processing until the signals of all frequency bands are processed:
acquiring a first covering switch of the current cascade optical/network port for judgment, and when the first covering switch is not started, setting gains of an uplink channel and a downlink channel of the current cascade optical/network port to zero to turn off a transmission channel of the current cascade optical/network port for the current frequency band;
when the first covering switch is turned on, the obtained uplink capacity is compared with a preset capacity threshold,
when the uplink capacity is smaller than the capacity low threshold, setting the gain of the uplink channel of the current cascade optical/network interface to zero, and cutting off the transmission channel of the current cascade optical/network interface for the current frequency band;
when the uplink capacity is larger than the capacity high threshold, a second covering switch of the current cascade optical/network interface is started, gains of uplink and downlink channels of other cascade optical/network interfaces of the current frequency band are set to be zero, other cascade optical/network interfaces of the current frequency band are cut off, a transmission channel of the current cascade optical/network interface is started only for the current frequency band, and a second covering switch identifier of the current cascade optical/network interface is set to be zero;
when the uplink capacity is between the capacity low threshold and the capacity high threshold, judging whether the second covering switch mark of the current cascade optical/network port is zero or not,
when the second coverage switch mark is zero, setting the second coverage switch mark of the current cascade optical/network port to one, starting the second coverage switch of the current cascade optical/network port, setting the uplink channel gain of the current cascade optical/network port of the current frequency band to one, setting the uplink and downlink channel gains of other cascade optical/network ports of the current frequency band to one, starting other cascade optical/network ports of the current frequency band, and combining uplink or downlink service data of the cascade optical/network ports for upward or downward transmission;
and when the second coverage switch identifier is not zero, setting the gain of the uplink channel of the current cascade optical/network port to be one, and combining uplink or downlink service data of the cascade optical/network port for upward or downward transmission.
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