CN115529630B

CN115529630B - Composite communication system and method

Info

Publication number: CN115529630B
Application number: CN202211507095.7A
Authority: CN
Inventors: 雷文明; 曾振兴; 蒋政; 邓勇志; 廖启峰
Original assignee: Guangzhou Shiju Network Technology Co Ltd
Current assignee: Guangzhou Shiju Network Technology Co Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-03-10
Anticipated expiration: 2042-11-29
Also published as: CN115529630A

Abstract

The application provides a composite communication system and a composite communication method, which are used for solving the technical problems that the data processing is unstable due to the fact that the technical difficulty of the conventional multiple signal co-processor is high and the mutual influence is caused on the physical layer processing. Wherein, a composite communication system includes at least: a network port merging module; an unpacking module; a BBU composite module; a dual-mode RRU module; an antenna. According to the communication resource types, the packaged data are split, and the signal data of different communication resource types are processed independently, so that the unpacking accuracy of the fusion networking is improved. By identifying different time delay weights of different signals, the sending priorities of the different signals are determined, and the efficiency of packet data transmission is improved. The device integration is realized on hardware, and the development efficiency on hardware is improved.

Description

Composite communication system and method

Technical Field

The present application relates to the field of communications technologies, and in particular, to a composite communication system and method.

Background

The 5G network is one of the hottest concepts in the field of current mobile networks, and the vision of "everything interconnection" and the goal of the upgrading of the power industry are to accelerate the pace of research and commercial deployment of 5G. Although 5G mobile communication is rapidly developing, most users still use 4G network. It can be seen that the 5G deployment process will be a long-term replacement, upgrade, and iteration process based on the 4G system. In order to ensure the continuity of the user service, the 4G network needs to be continuously used in the area where the 5G network cannot cover, so the prior art performs fusion networking on the 4G signal and the 5G signal.

In the process of realizing the prior art, the inventor finds that:

because the network systems of different communication systems are different, in the process of transmitting the communication signals after the convergence networking, unpacking errors are easy to occur, thereby causing poor transmission quality.

Therefore, it is desirable to provide a new composite communication system and method for solving the technical problem of high error rate of packet decoding in converged networking.

Disclosure of Invention

The embodiment of the application provides a new composite communication system and a method, which are used for solving the technical problem of high packet-decoding error rate of converged networking.

Specifically, a composite communication system includes:

the network port merging module is used for acquiring packet data of at least two composite communication resource types;

the unpacking module is used for at least splitting the packed data into first data of a first communication resource type or second data of a second communication resource type different from the first data according to the communication resource types;

the BBU composite module is used for modulating the first data to generate a first digital baseband signal; the second digital baseband signal is used for modulating second data to generate a second digital baseband signal different from the first digital baseband signal; the first digital baseband signal and the second digital baseband signal are compounded to generate a first compound digital baseband signal labeled with at least two communication resource types;

the dual-mode RRU module is connected with the BBU composite module through an optical fiber and is used for acquiring a first composite digital baseband signal; the receiver is further used for splitting a first digital baseband signal and a second digital baseband signal different from the first digital baseband signal from the first composite digital baseband signal according to the communication resource type; the first digital baseband signal is demodulated to generate a first analog baseband signal; the second digital baseband signal is demodulated to generate a second analog baseband signal different from the first analog baseband signal; the first analog baseband signal is amplified in power to generate a first radio frequency signal; the second analog baseband signal is also used for amplifying the power of the second analog baseband signal to generate a second radio frequency signal different from the first radio frequency signal;

and the antenna is connected with the dual-mode RRU module through a radio frequency cable and is used for transmitting a first radio frequency signal and a second radio frequency signal.

Further, the BBU complex module is further configured to complex at least the first digital baseband signal and the second digital baseband signal to generate a first complex digital baseband signal labeled with at least two communication resource types, and specifically configured to:

identifying a first delay weight of the first digital baseband signal and a second delay weight of the second digital baseband signal;

reordering the first digital baseband signal of the first time delay weight and the second digital baseband signal of the second time delay weight according to the time delay weight;

and compounding the sequenced first digital baseband signal and second digital baseband signal to generate a first composite digital baseband signal labeled with two communication resource types.

Further, the dual-mode RRU module is configured to demodulate the first digital baseband signal to generate a first analog baseband signal, and specifically includes:

demodulating the first digital baseband signal to generate time domain IQ data;

and packaging the time domain IQ data to generate a first analog baseband signal.

Further, the dual-mode RRU module is further configured to demodulate a second digital baseband signal, and generate a second analog baseband signal different from the first analog baseband signal, and specifically configured to:

demodulating the second digital baseband signal to generate frequency domain data;

the frequency domain data is packaged to generate a second analog baseband signal different from the first analog baseband signal.

Further, the antenna is further configured to obtain at least a third radio frequency signal of the first communication resource type and a fourth radio frequency signal of the second communication resource type;

the dual-mode RRU module is also used for amplifying the third radio frequency signal to generate a third analog baseband signal; the second amplifier is further configured to amplify the fourth rf signal to generate a fourth analog baseband signal different from the third analog baseband signal; the second analog baseband signal is used for modulating a second analog baseband signal to generate a second digital baseband signal; the second analog baseband signal is modulated to generate a second digital baseband signal different from the first digital baseband signal; further for combining at least the third digital baseband signal and a fourth digital baseband signal different from the third digital baseband signal to generate a second combined digital baseband signal;

the BBU composite module is also used for acquiring a second composite digital baseband signal; the second digital baseband signal is split to generate a third digital baseband signal and a fourth digital baseband signal different from the third digital baseband signal; further for demodulating the third digital baseband signal to generate third data of the first communications resource type; further for demodulating the fourth digital baseband signal to generate fourth data of the second communication resource type; the data processing device is also used for compounding third data of the first communication resource type and fourth data of the second communication resource type to generate packaged data of at least two communication resource types; and is also used for sending the packaged data to the core network.

Further, the dual-mode RRU module is further configured to at least compound a third digital baseband signal and a fourth digital baseband signal different from the third digital baseband signal according to a communication resource type to generate a second compound digital baseband signal, and specifically configured to:

identifying a first delay weight of the third digital baseband signal and a second delay weight of the fourth digital baseband signal;

reordering the third digital baseband signal of the first time delay weight and the fourth digital baseband signal of the second time delay weight according to the time delay weight;

and compounding the sequenced third digital baseband signal and the fourth digital baseband signal to generate a second composite digital baseband signal labeled with two communication resource types.

The embodiment of the present application further provides a composite communication method, including:

acquiring packet data compounding at least two communication resource types;

the packaged data is split into at least first data of a first communication resource type or a second communication resource type different from the first data, according to the communication resource types.

Modulating the first data to generate a first digital baseband signal;

modulating the second data to generate a second digital baseband signal different from the first digital baseband signal;

at least compounding the first digital baseband signal and the second digital baseband signal to generate a first compounded digital baseband signal labeled with at least two communication resource types;

splitting a first digital baseband signal and a second digital baseband signal different from the first digital baseband signal from the first composite digital baseband signal according to the communication resource type;

demodulating the first digital baseband signal to generate a first analog baseband signal;

demodulating the second digital baseband signal to generate a second analog baseband signal different from the first analog baseband signal;

amplifying the power of the first analog baseband signal to generate a first radio frequency signal;

amplifying the second analog baseband signal to generate a second radio frequency signal different from the first radio frequency signal;

and transmitting a first radio frequency signal and a second radio frequency signal.

Further, the at least first digital baseband signal and the second digital baseband signal are combined to generate a first composite digital baseband signal labeled with at least two communication resource types, specifically:

identifying a first delay weight for the first digital baseband signal and a second delay weight for the second digital baseband signal;

and compounding the sequenced first digital baseband signal and the second digital baseband signal to generate a first composite digital baseband signal labeled with two communication resource types.

An embodiment of the present application further provides a BBU composite communication system, including:

the first communication resource type modulation module is used for modulating first data to generate a first digital baseband signal;

a second communication resource type modulation module for modulating second data to generate a second digital baseband signal different from the first digital baseband signal;

and the common forward transmission card is used for at least compounding the first digital baseband signal and the second digital baseband signal to generate a first composite digital baseband signal at least marking two communication resource types.

An embodiment of the present application further provides a dual-mode RRU composite communication system, including:

an acquisition module for acquiring a first complex digital baseband signal; the receiver is further used for splitting a first digital baseband signal and a second digital baseband signal different from the first digital baseband signal from the first composite digital baseband signal according to the communication resource type;

the first communication resource type demodulation module is used for demodulating the first digital baseband signal and generating a first analog baseband signal;

a first communications resource type demodulation module for demodulating the second digital baseband signal to generate a second analog baseband signal different from the first analog baseband signal;

the first radio frequency module is used for amplifying the power of the first analog baseband signal to generate a first radio frequency signal;

and the second radio frequency module is used for amplifying the power of the second analog baseband signal and generating a second radio frequency signal different from the first radio frequency signal.

The technical scheme provided by the embodiment of the application has at least the following beneficial effects:

according to the communication resource types, the packaged data are split, and the signal data of different communication resource types are processed independently, so that the unpacking accuracy of the fusion networking is improved. By identifying different time delay weights of different signals, the sending priorities of the different signals are determined, and the efficiency of packet data transmission is improved. The 4G BBU and the 5G BBU are fused into the BBU composite communication module, and the 4G RRU and the 5G RRU are fused into the dual-mode RRU module, so that the equipment integration is realized on hardware, and the development efficiency on hardware is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of a composite communication system according to an embodiment of the present application;

fig. 2 is a flowchart of a composite communication method according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a BBU composite communication system according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a dual-mode RRU composite communication system according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an uplink and downlink data composite communication system according to an embodiment of the present application.

The reference numbers in the figures denote:

100-composite communication system

11-network port merging module

12-unpacking module

13-BBU composite module

14-dual mode RRU module

15-aerial

200-BBU composite communication system

21-first communications resource type modulation module

22-second communication resource type modulation module

23-common forward transmission card

300-dual-mode RRU composite communication system

31-acquisition Module

32-first communications resource type demodulation module

33-second communication resource type demodulation module

34-first radio frequency module

35-a second radio frequency module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Mobile communications have now undergone the development of 1G, 2G, 3G, 4G and 5G. Every inter-generation transition and technological progress of mobile communication greatly promotes the development of industry upgrading and economic society. From 1G to 2G, mobile communication enables transition from analog communication to digital communication. From 2G to 3G and 4G, the mobile communication realizes the conversion from voice service to data service, the transmission rate is increased hundreds of times, and the popularization and prosperity of the application of the mobile internet are promoted. In order to meet the requirement of diversified application scenes of 5G, the key performance indexes of 5G are more diversified.

A Base Station (Base Station), i.e. a public mobile communication Base Station, is an interface device for accessing a wireless terminal to the internet, and can implement wireless signal transmission between a wired communication network and the wireless terminal. The base station can be roughly divided into: macro base station, micro base station, pico base station, femto base station. The macro base station is characterized by being suitable for outdoor coverage, large in size and wide in coverage area. A micro base station generally refers to a small base station installed in a building or densely populated area. The micro base station has small volume, small coverage area and lower loaded user quantity. The pico-base station is a smaller base station than the former two, and can be used in office buildings, indoor public places and the like. The femto base station is mainly used by a home user and has smaller volume.

Typically, the base station comprises: a Baseband processing Unit (BBU), a Radio Remote Unit (RRU), and an antenna feed system. The baseband processing unit mainly completes processing of baseband signals and transmits the signals to the RRU through optical fibers. The radio frequency module of the radio remote unit mainly completes the conversion between the air radio frequency signal and the baseband signal, the amplification, the receiving and the sending of the radio frequency signal and other functions. The RRU is typically located on the upper tower and below the antenna. The antenna feed system mainly comprises a feed line and an antenna. The feeder line is used for connecting the RRU and the antenna, and the antenna radiates the radio frequency signal.

In the 5G era, the RRU and the Antenna feed system are combined into an Active Antenna Unit (AAU), and are connected to the BBU through an optical fiber, so that site deployment can be simplified, the feeder complexity can be reduced, transmission loss can be reduced, and the overall performance of the network can be improved. The BBU is decomposed into CU (Centralized Unit) and DU (Distributed Unit), the CU is used for processing non-real-time data in a Centralized mode, and the DU is used for processing real-time data in a Distributed mode. Each CU can manage a plurality of DUs, and different base station access scenes can be adapted between the CUs and the DUs through different networking schemes.

Referring to fig. 1, to solve the technical problem of high packet error rate in converged networking, the present application provides a composite communication system 100, which includes:

the network port merging module 11 is configured to obtain packet data of at least two composite communication resource types;

the unpacking module 12 is configured to, according to the communication resource type, split the packed data into at least first data of a first communication resource type or second data of a second communication resource type different from the first data;

a BBU composite module 13, configured to modulate the first data and generate a first digital baseband signal; the second data modulator is also used for modulating the second data to generate a second digital baseband signal different from the first digital baseband signal; the device is also used for compounding at least the first digital baseband signal and the second digital baseband signal to generate a first composite digital baseband signal which is at least marked with two communication resource types;

a dual-mode RRU module 14 connected to the BBU composite module through an optical fiber, for acquiring a first composite digital baseband signal; the first digital baseband signal and a second digital baseband signal different from the first digital baseband signal are split from the first composite digital baseband signal according to the communication resource type; the first digital baseband signal is demodulated to generate a first analog baseband signal; also for demodulating the second digital baseband signal to generate a second analog baseband signal different from the first analog baseband signal; the first analog baseband signal is amplified in power to generate a first radio frequency signal; the second analog baseband signal is also used for amplifying the power of the second analog baseband signal to generate a second radio frequency signal different from the first radio frequency signal;

and the antenna 15 connected with the dual-mode RRU module through a radio frequency cable is used for transmitting a first radio frequency signal and a second radio frequency signal.

It is understood that, in downstream communication, the portal merge module 11 obtains group package data that composites at least two communication resource types. The communication resource types may comprise different versions of the communication system. The group packet data obtained by combining at least two communication resource types can be understood as group packet data that combines a plurality of different versions of communication systems. For example, the group packet data of at least two composite communication resource types may be a fusion signal obtained by fusion and networking of 4G signals and 5G signals.

Preferably, the set of packet data further has a communication resource type identifier. The communications resource type of each signal in the packaged data can be identified based on the communications resource type identifier.

The network port is a network interface. The network interfaces in use today are all ethernet interfaces. Ethernet (Ethernet) is the most widely used lan communication method and is also a protocol. And an ethernet interface is a port for a network data connection. The ethernet interface is an interface for lan networking, and includes: ethernet electrical interface, ethernet optical interface.

In a specific embodiment, the first data of the first communication resource type is 4G data, and the second data of the second communication resource type is 5G data. It will be appreciated that the application layer separates the 4G, 5G user plane and control plane data and packages them into ethernet packets. Meanwhile, the application layer assigns different IP addresses to packets of two communication resource types. The 4G, 5G ethernet packets are then transmitted to the core network via the backhaul port. And the core network classifies and finishes the processing of the 4G and 5G Ethernet packets according to the IP address, and then transmits the packets to the network port merging unit by classification through the return port. In a specific embodiment of the present application, the portal merging unit may be regarded as a router, and routes the corresponding data packet to the BBU unit of the corresponding mode. The 5G BBU and the 4G BBU network ports are routed to the same network port together, namely, one network port is shared by the core network.

The unpacking module 12 is configured to, according to the communication resource type, split the packed data into at least first data of a first communication resource type or second data of a second communication resource type different from the first data. It is to be understood that the unpacking module 12 can split the packed data according to the communication resource type identifier of the packed data, at least splitting first data of a first communication resource type or splitting second data of a second communication resource type different from the first data. The method is visual and visible, communication signals after being integrated and networked are split, and signal data of different communication resource types are processed independently, so that packet learning errors are avoided, and transmission quality is high.

A BBU composite module 13, configured to modulate the first data and generate a first digital baseband signal; the second data modulator is also used for modulating the second data to generate a second digital baseband signal different from the first digital baseband signal; and the processor is further configured to composite at least the first digital baseband signal and the second digital baseband signal to generate a first composite digital baseband signal labeled with at least two communication resource types.

The baseband processing unit (BBU) mainly performs processing of baseband signals, i.e., is mainly responsible for signal modulation and transmits signals to the RRU through optical fibers. The BBU is a baseband processing unit of the base station, provides an external interface, and completes the functions of resource management, operation maintenance, environment monitoring and the like of the system. The BBU comprises a main control unit module, a baseband extension unit and a transmission extension unit. One BBU can support a plurality of RRUs, and the scheme of combining the BBU with the RRUs in a multi-channel mode can well solve the indoor coverage of a large-scale venue.

It can be understood that different digital baseband signals have different delay weights, which takes into account that different digital baseband signals have different delay requirements, and therefore different weight values are used to determine the transmission priority. If different digital baseband signals are transmitted simultaneously, interference can be generated between different frequency spectrums, and the transmission efficiency is influenced.

The first digital baseband signal of the first time delay weight is the 4G data packet. The first digital baseband signal of the second time delay weight is the 5G data packet.

It is understood that there are only two parts, fronthaul and backhaul, in 4G networks. In the 5G network, the evolution is three parts, the AAU connection DU part is called 5G forward (frontaul), the Middlehaul (Middlehaul) refers to the connection DU connection CU part, and the backward (Backhaul) is the communication bearer common forward card between the CU and the core network

In a specific embodiment, a PCIE (peripheral component interconnect express) Interface is used between the 5G BBU and the fronthaul card to transmit eCPRI (enhanced Common Public Radio Interface) frequency domain data. Among them, PCIE is a high-speed serial computer expansion bus standard.

The transmission between the 4G BBU and the forwarding card can be transmitted in two ways. The first is to use CPRI to communicate time domain IQ data. Another is to use radio frequency coupling. When the scheme of radio frequency coupling is adopted, the baseband board outputs a radio frequency signal and then is connected to the forward card through a radio frequency line. And after the forwarding card is coupled in through radio frequency, the IQ data is packaged according to the packet format of the eCPRI. Wherein, the packaging process adopts an extended antenna carrier identification (E _ axid) to identify 5G and 4G data packets. In the specific embodiment of the present application, 0 represents a 5G packet, and 1 represents a 4G packet. After combining the 5G data packet and the 4G data packet, sequencing and transmitting the data packet to a downlink. Because the 4G data packet is time domain IQ data and the requirement on the time delay is strict, the 4G data packet is transmitted preferentially.

Here, I and Q are abscissa and ordinate values of coordinate points on the IQ coordinate system. The IQ coordinate system is essentially a complex coordinate system, which is called IQ coordinate system in the digital modulation process, in order to achieve modulation.

In a specific embodiment, according to the delay weight, the first digital baseband signal of the first delay weight and the second digital baseband signal of the second delay weight are sequenced and compounded according to the weight, so that the delay of data transmission is reduced.

The dual-mode RRU module is connected with the BBU composite module through an optical fiber and is used for acquiring a first composite digital baseband signal; the receiver is further used for splitting a first digital baseband signal and a second digital baseband signal different from the first digital baseband signal from the first composite digital baseband signal according to the communication resource type; the first digital baseband signal is demodulated to generate a first analog baseband signal; also for demodulating the second digital baseband signal to generate a second analog baseband signal different from the first analog baseband signal; the first analog baseband signal power amplifier is also used for amplifying the first analog baseband signal power to generate a first radio frequency signal; and is further configured to power amplify the second analog baseband signal to generate a second radio frequency signal different from the first radio frequency signal.

It can be understood that the radio remote unit RRU is divided into 4 large modules: the device comprises an intermediate frequency module, a transceiver module, a power amplifier and a filtering module. The digital intermediate frequency module is used for modulation and demodulation, digital up-down frequency conversion, A/D conversion and the like of optical transmission. For the downlink direction, the optical fiber is directly connected to the RRU from the BBU, and baseband digital signals are transmitted between the BBU and the RRU. The base station controls the signal of a certain user to be transmitted from the designated RRU channel, so that the interference to the users on other channels of the cell can be greatly reduced.

In a specific embodiment of the present application, the dual-mode RRU module separates the first complex digital baseband signal sent by the BBU to the corresponding 5G link and 4G link according to the E _ AXCID field identifier.

demodulating the first digital baseband signal to generate time domain IQ data;

In a specific embodiment of the present application, the 4G signal processing module performs digital signal processing on data from a radio frequency, and then packages the IQ data according to an eccri packet format. Wherein, the E _ AXCID field is used to identify 5G or 4G packets when packaging. In this case, 0 represents a 5G packet and 1 represents a 4G packet. And the 5G signal processing module demodulates the second digital baseband signal from the radio frequency to generate frequency domain data. And processing the frequency domain data LOWPHY, and then packaging according to an eCPRI protocol format to generate a second analog baseband signal different from the first analog baseband signal.

It can be understood that the LowPHY part is a baseband processing part in the RRU, is located at the lowest layer of an air interface protocol stack, and is mainly responsible for encoding, physical layer HARQ (Hybrid Automatic Repeat Request) processing, modulation, multi-antenna processing, mapping of signals on corresponding time frequency resources, and the like.

It is understood that an antenna is a device for radiating electromagnetic waves to or from a space in a radio transmission and reception system, and is an essential part of a radio communication system. Because the different wave bands required by various devices are different, the design of the antenna is also different, and the antenna for different purposes needs to be designed into various types, which is commonly called an antenna program. The antenna has five basic parameters: directivity factor, antenna efficiency, gain factor, radiation resistance, and antenna effective height. These parameters are important indicators for measuring the quality of the antenna.

The radio frequency signal power output by the radio transmitter is transmitted to the antenna through the radio frequency cable, and is radiated out by the antenna in the form of electromagnetic waves.

Through the coprocessors, the mature board card technology is adopted for construction, various types of signals can be processed together, the development is simple, the integration level is relatively high, and the networking is relatively easy.

Further, the antenna is further configured to obtain at least a third rf signal of the first communication resource type and a fourth rf signal of the second communication resource type.

the BBU composite module is also used for acquiring a second composite digital baseband signal; the second digital baseband signal is split to generate a third digital baseband signal and a fourth digital baseband signal different from the third digital baseband signal; further for demodulating the third digital baseband signal to generate third data of the first communications resource type; further for demodulating the fourth digital baseband signal to generate fourth data of the second communications resource type; the communication resource management module is also used for compounding third data of the first communication resource type and fourth data of the second communication resource type to generate packed data compounded with at least two communication resource types; and is also used for sending the packaged data to the core network.

It is to be appreciated that in the uplink, the antenna acquires at least a third radio frequency signal of the first communication resource type and a fourth radio frequency signal of the second communication resource type. The third rf signal of the first communication resource type may be a 4G signal and the fourth rf signal of the second communication resource type may be a 5G signal.

And after the antenna acquires the combined data, the data is sent to the dual-mode RRU module through the radio frequency cable.

In a specific embodiment of the present application, the dual-mode RRU module performs analog-to-digital conversion on a signal acquired from an antenna, and then demodulates the signal to generate third data of the first communication resource type and fourth data of the second communication resource type.

The composite communication system is also suitable for the uplink, the integration level of hardware development is improved, and the development period is shortened.

It is understood that the dual-mode RRU module combines the third digital baseband signal and a fourth digital baseband signal different from the third digital baseband signal to generate a second composite digital baseband signal in a certain order.

In this embodiment of the present application, a third rf signal of the first communication resource type and a fourth rf signal of the second communication resource type are stored in the first ram and the second ram, respectively, and then read out according to the weight sequence. And reading the third digital baseband signal packet if the third digital baseband signal is stored in the whole packet. The fourth digital baseband signal is read as soon as the fourth digital baseband signal has been completely stored in the packet. In a specific scenario, if a data packet of the third digital baseband signal and the fourth digital baseband signal is completely stored at the same time, the third digital baseband signal of the first delay weight is preferentially read. Because the third digital baseband signal is 4G data and the requirement on the time delay is strict, the 4G packet is transmitted preferentially. And compounding the sequenced third digital baseband signal and the fourth digital baseband signal to generate a second composite digital baseband signal labeled with two communication resource types.

The signals are compounded according to the time delay weight and are used for processing uplink data, and the integrity and the applicability of the system are improved.

The BBU composite module further comprises:

a mode separation module for obtaining a second composite digital baseband signal from the dual-mode RRU module;

the second composite digital baseband signal is split according to the carrier identifier of the extension antenna to generate a third digital baseband signal and a fourth digital baseband signal different from the third digital baseband signal;

and further for transmitting the third digital baseband signal to the first communications resource type link;

and also for transmitting a fourth digital baseband signal, different from the third digital baseband signal, to the second communications resource type link.

It can be understood that the second composite digital baseband signal is a 4G, 5G data packet transmitted by the RRU from the mode separation module. And then, separating the corresponding 5G link and 4G link according to the E _ AXCID field identification. And the 5G link part is sent to the 5G BBU according to the PCIE interface time sequence. After IQ data are decomposed by the 4G link part, if the IQ data are CPRI protocol interfaces, the 4G BBU is sent to according to CPRI format. And if the scheme is a radio frequency coupling scheme, the scheme is sent to a DAC interface and transmitted to the 4G BBU board card through a radio frequency link.

In the prior art base station, the remote units are connected according to the universal public radio interface protocol option 7-2. The physical resources of the remote unit are divided according to the logic function in advance, and corresponding extension antenna carrier identifiers are distributed to each physical resource. When transmitting data, a transmitting end packs the data according to an eCPRI protocol, and a packet header comprises an extended antenna carrier identification field corresponding to a logic function; when the receiving end processes the data, the extension antenna carrier wave identification field in the packet header is analyzed, and the corresponding physical resource is determined.

By adding a mode separation module for processing uplink data, the integrity and applicability of the system are improved.

In summary, based on the existing mature baseband board card technology, the baseband is separated, the BBU complete machine integrates the common fronthaul card and the common radio frequency processing unit, signal integration of multiple communication type resources is realized on hardware, the communication signals integrated and networked are transmitted, unpacking errors are not easy to occur, the transmission quality is high, meanwhile, the mutual influence on the physical layer processing is reduced, the stability of data processing is improved, the integration level on the hardware is improved, and the development efficiency is improved.

Referring to fig. 2, in order to support the composite communication system 100, the present application further provides a composite communication method, including:

s101: acquiring packaged data combining at least two communication resource types;

s102: according to the communication resource type, splitting the group package data into at least first data of a first communication resource type or second data of a second communication resource type different from the first data;

s103: modulating the first data to generate a first digital baseband signal;

s104: modulating the second data to generate a second digital baseband signal different from the first digital baseband signal;

s105: and at least compounding the first digital baseband signal and the second digital baseband signal to generate a first compounded digital baseband signal labeled with at least two communication resource types.

S106: splitting a first digital baseband signal and a second digital baseband signal different from the first digital baseband signal from the first composite digital baseband signal according to the communication resource type;

s107: demodulating the first digital baseband signal to generate a first analog baseband signal;

s108: demodulating the second digital baseband signal to generate a second analog baseband signal different from the first analog baseband signal;

s109: amplifying the power of the first analog baseband signal to generate a first radio frequency signal;

s110: amplifying the second analog baseband signal to generate a second radio frequency signal different from the first radio frequency signal;

s111: and transmitting a first radio frequency signal and a second radio frequency signal.

In step S101, group package data combining at least two communication resource types is obtained.

It is understood that, in downstream communication, the portal merge module 11 obtains group package data that composites at least two communication resource types. The communication resource types may comprise different versions of the communication system. The packaged data combining at least two communication resource types can be understood as packaged data combining a plurality of different versions of communication systems. For example, the group packet data of at least two communication resource types may be a fusion signal obtained by fusion and networking of a 4G signal and a 5G signal.

Preferably, the set of packet data further has a communication resource type identifier. The communications resource type of each signal in the packaged data set is identifiable in accordance with the communications resource type identifier.

The packaged packet data is split into at least first data of a first communication resource type or second data of a second communication resource type different from the first data.

The unpacking module can split the packed data according to the communication resource type identifier of the packed data, and split at least first data of a first communication resource type or second data of a second communication resource type different from the first data. The method is visual and visible, communication signals after the integration and networking are split, and signal data of different communication resource types are processed independently, so that the occurrence of packet understanding errors is avoided, and the transmission quality is high.

In a specific embodiment, the first data of the first communication resource type is 4G data, and the second data of the second communication resource type is 5G data. It will be appreciated that the application layer separates the 4G, 5G user plane and control plane data and packages them into ethernet packets. Meanwhile, the application layer assigns different IP addresses to packets of two communication resource types. The 4G, 5G ethernet packets are then transmitted to the core network via the backhaul port. And the core network classifies and finishes the processing of the 4G and 5G Ethernet packets according to the IP address, and then transmits the packets to the network port merging unit by classification through the return port. In a specific embodiment of the present application, the portal merging unit may be regarded as a router, and routes the corresponding data packet to the BBU unit of the corresponding mode. It will be appreciated that the 5G BBU and the 4G BBU network ports are routed together to the same network port, i.e. share one network port for the core network.

The BBU composite module is used for modulating the first data to generate a first digital baseband signal; the second digital baseband signal is used for modulating second data to generate a second digital baseband signal different from the first digital baseband signal; and the device is also used for compounding at least the first digital baseband signal and the second digital baseband signal to generate a first compound digital baseband signal labeled with at least two communication resource types.

The baseband processing unit (BBU) mainly performs processing of baseband signals, i.e., is mainly responsible for signal modulation and transmits signals to the RRU through optical fibers. The BBU is a baseband processing unit of the base station, provides an external interface, and completes the resource management, operation maintenance, environment monitoring functions and the like of the system. The BBU comprises a main control unit module, a baseband extension unit and a transmission extension unit. One BBU can support a plurality of RRUs, and the scheme of combining the BBU with the RRUs in a multi-channel mode can well solve the problem of indoor coverage of a large-scale venue.

It can be understood that different digital baseband signals have different delay weights, which takes into account that different digital baseband signals have different delay requirements, and therefore different weight values are used to determine the transmission priority.

It is understood that the first digital baseband signal of the first delay weight is a 4G data packet. The first digital baseband signal of the second time delay weight is the 5G data packet.

It can be understood that there are only two parts in the 4G network, fronthaul and backhaul. In the 5G network, three parts are evolved, the part of AAU connecting DU is called 5G forward (frontaul), the part of middle transmission (Middlehaul) refers to that DU connecting CU, and the part of back transmission (Backhaul) refers to that the communication bearer between CU and core network is a forward transmission card

In a specific embodiment, a PCIE (peripheral component interconnect express) Interface is used between the 5G BBU and the fronthaul card to transmit eccri (enhanced Common Public Radio Interface) frequency domain data. Among them, PCIE is a high-speed serial computer expansion bus standard.

The transmission between the 4G BBU and the fronthaul card can be transmitted in two ways. The first is to transmit time domain IQ data using CPRI. Another is to use radio frequency coupling. When the radio frequency coupling scheme is adopted, the baseband board outputs a radio frequency signal, and then is connected to the forward card through a radio frequency line. After the forwarding card is coupled in through radio frequency, the IQ data is packaged according to the packet format of eCPRI. Wherein, the packaging process adopts E _ AXCID (extended antenna carrier identification) to identify 5G and 4G data packets. In the specific embodiment of the present application, 0 represents a 5G packet, and 1 represents a 4G packet. After combining the 5G data packet and the 4G data packet, sequencing and transmitting the data packet to a downlink. Because the 4G data packet is a time domain IQ, the requirement on time delay is strict, and therefore the 4G data packet is transmitted preferentially.

In a specific embodiment, as shown in fig. 5, the first data of the first communication resource type is 4G data, and the second data of the second communication resource type is 5G data. It will be appreciated that the application layer separates the 4G, 5G user plane and control plane data and packages them into ethernet packets. Meanwhile, the application layer assigns different IP addresses to packets of two communication resource types. Next, 4G, 5G ethernet packets are passed through the backhaul port into the core network. And the core network classifies and finishes the processing of the 4G and 5G Ethernet packets according to the IP address, and then transmits the packets to the network port merging unit by classification through the return port. In a specific embodiment, the portal merge unit can be regarded as a router, which routes the corresponding data packet to the BBU unit of the corresponding mode. It will be appreciated that the 5G BBU and the 4G BBU network ports are routed together to the same network port, i.e. share one network port for the core network.

In a specific embodiment, the 5G BBU and the fronthaul card transmit eccri frequency domain data using a PCIE interface. Among them, PCIE is a high-speed serial computer expansion bus standard.

The transmission between the 4G BBU and the fronthaul card can be transmitted in two ways. The first is to use CPRI to communicate time domain IQ data. Another is to use radio frequency coupling. When the radio frequency coupling scheme is adopted, the baseband board outputs a radio frequency signal, and then is connected to the forward card through a radio frequency line. And after the forwarding card is coupled in through radio frequency, the IQ data is packaged according to the packet format of the eCPRI. Wherein, E _ AXCID is adopted in the packaging process to identify 5G and 4G data packets. In the specific embodiment of the present application, 0 represents a 5G packet, and 1 represents a 4G packet. After combining the 5G data packet and the 4G data packet, sequencing and transmitting the data packet to a downlink. Because the 4G data packet is a time domain IQ, the requirement on time delay is strict, and therefore the 4G data packet is transmitted preferentially.

In a specific embodiment of the present application, 4G and 5G packets sent by a BBU are separated to a corresponding 5G link and 4G link according to an E _ axid field identifier. The 5G link part is processed by LOWPHY to be converted into a time domain IQ, and the time domain IQ passes through a digital-to-analog converter to generate an analog signal. The 4G link unit decomposes IQ data and then performs digital signal processing.

In a specific embodiment of the present application, the first communication resource type demodulation module performs digital signal processing on data from a radio frequency, and then packages the IQ data according to an eccri packet format. Wherein, the E _ AXCID field is used to identify 5G or 4G packets when packaging. In this case, 0 represents a 5G packet and 1 represents a 4G packet. The second communication resource type demodulation module performs LOWPHY processing on the data from the radio frequency, and then packages the data according to an eCPRI protocol format.

Referring to fig. 3, in order to support the composite communication system 100, the present application further provides a BBU composite communication system, including:

the first communication resource type modulation module is used for modulating the first data to generate a first digital baseband signal;

The transmission between the 4G BBU and the fronthaul card can be transmitted in two ways. The first is to use CPRI to communicate time domain IQ data. Another is to use radio frequency coupling. When the radio frequency coupling scheme is adopted, the baseband board outputs a radio frequency signal, and then is connected to the forward card through a radio frequency line. And after the forwarding card is coupled in through radio frequency, the IQ data is packaged according to the packet format of the eCPRI. Wherein, the E _ AXCID is adopted in the packaging process to identify 5G and 4G data packets. In the specific embodiment of the present application, 0 represents a 5G packet, and 1 represents a 4G packet. After combining the 5G data packet and the 4G data packet, sequencing and transmitting the data packet to a downlink. Because the 4G data packet is a time domain IQ, the requirement on time delay is strict, and therefore the 4G data packet is transmitted preferentially.

In conclusion, the 4G BBUs and the 5G BBUs are integrated on the same BBU case and the same RRU, so that the integration level of hardware is improved, and the networking difficulty is reduced.

Referring to fig. 4, in order to support the composite communication system 100, the present application further provides a dual-mode RRU composite communication system, which includes:

an acquisition module for acquiring a first complex digital baseband signal; the first digital baseband signal and a second digital baseband signal different from the first digital baseband signal are split from the first composite digital baseband signal according to the communication resource type;

the first communication resource type demodulation module is used for demodulating the first digital baseband signal to generate a first analog baseband signal;

It can be understood that RRU is divided into 4 large modules: the device comprises an intermediate frequency module, a transceiver module, a power amplifier and a filtering module. The digital intermediate frequency module is used for modulation and demodulation, digital up-down frequency conversion, A/D conversion and the like of optical transmission. For the downlink direction, the optical fiber is directly connected to the RRU from the BBU, and baseband digital signals are transmitted between the BBU and the RRU. The base station controls the signal of a certain user to be transmitted from the designated RRU channel, so that the interference to the users on other channels of the cell can be greatly reduced.

In a specific embodiment of the present application, the first complex digital baseband signal sent by the BBU is separated into a corresponding 5G link and a corresponding 4G link according to the E _ axid field identification. The 5G link part is processed by LOWPHY to be converted into a time domain IQ, and the time domain IQ passes through a digital-to-analog converter to generate an analog signal. The 4G link unit decomposes the IQ data and then performs digital signal processing.

In a specific embodiment of the present application, the first communication resource type demodulation module packages the IQ data according to the packet format of the eCPRI after performing digital signal processing on the data from the radio frequency. Wherein, the E _ AXCID field is used to identify whether the 5G or 4G packet is used when the packet is packaged. In this case, 0 represents a 5G packet and 1 represents a 4G packet. The second communication resource type demodulation module performs LOWPHY processing on the data from the radio frequency, and then packages the data according to an eCPRI protocol format.

In conclusion, according to the communication resource types, the packaged data are split, and the signal data of different communication resource types are separately processed, so that the unpacking accuracy of the converged networking is improved. By identifying different time delay weights of different signals, the sending priorities of the different signals are determined, and the efficiency of packet data transmission is improved. The 4G BBU and the 5G BBU are fused into the BBU composite communication module, and the 4G RRU and the 5G RRU are fused into the dual-mode RRU module, so that the equipment integration is realized on hardware, and the development efficiency on hardware is improved.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statements "comprising one of 8230 \8230;" 8230; "defining elements does not exclude the presence of additional like elements in the process, method, article, or apparatus that comprises said elements.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A composite communication system, comprising:

the unpacking module is used for at least splitting the packed data into first data of a first communication resource type and second data of a second communication resource type different from the first data according to the communication resource types;

the BBU composite module is used for modulating the first data and generating a first digital baseband signal; the second digital baseband signal is used for modulating second data to generate a second digital baseband signal different from the first digital baseband signal; the device is also used for compounding at least the first digital baseband signal and the second digital baseband signal to generate a first composite digital baseband signal which is at least marked with two communication resource types;

the BBU complex module is further configured to complex at least the first digital baseband signal and the second digital baseband signal to generate a first complex digital baseband signal labeled with at least two communication resource types, and specifically configured to:

compounding the sequenced first digital baseband signal and the second digital baseband signal to generate a first composite digital baseband signal labeled with two communication resource types;

the dual-mode RRU module is connected with the BBU composite module through an optical fiber and is used for acquiring a first composite digital baseband signal; the receiver is further used for splitting a first digital baseband signal and a second digital baseband signal different from the first digital baseband signal from the first composite digital baseband signal according to the communication resource type; the first digital baseband signal is demodulated to generate a first analog baseband signal; also for demodulating the second digital baseband signal to generate a second analog baseband signal different from the first analog baseband signal; the first analog baseband signal power amplifier is also used for amplifying the first analog baseband signal power to generate a first radio frequency signal; the second analog baseband signal is also used for amplifying the power of the second analog baseband signal to generate a second radio frequency signal different from the first radio frequency signal;

and the antenna connected with the dual-mode RRU module through a radio frequency cable is used for transmitting a first radio frequency signal and a second radio frequency signal.

2. The composite communication system of claim 1, wherein the dual-mode RRU module is configured to demodulate the first digital baseband signal to generate a first analog baseband signal, and specifically comprises:

demodulating the first digital baseband signal to generate time domain IQ data;

3. The composite communication system of claim 1, wherein the dual-mode RRU module is further configured to demodulate a second digital baseband signal and generate a second analog baseband signal different from the first analog baseband signal, and specifically configured to:

4. The composite communication system of claim 1, wherein the antenna is further configured to acquire at least a third radio frequency signal of the first communication resource type, a fourth radio frequency signal of the second communication resource type;

the dual-mode RRU module is also used for amplifying the third radio frequency signal to generate a third analog baseband signal; the second amplifier is further configured to amplify the fourth rf signal to generate a fourth analog baseband signal different from the third analog baseband signal; the second analog baseband signal is modulated to generate a second digital baseband signal; the second analog baseband signal is modulated to generate a second digital baseband signal different from the first digital baseband signal; and for combining at least the third digital baseband signal and a fourth digital baseband signal different from the third digital baseband signal to generate a second combined digital baseband signal;

5. The composite communication system of claim 4, wherein the dual-mode RRU module is further configured to composite at least a third digital baseband signal and a fourth digital baseband signal different from the third digital baseband signal according to a communication resource type to generate a second composite digital baseband signal, and is specifically configured to:

and compounding the sequenced third digital baseband signal and fourth digital baseband signal to generate a second composite digital baseband signal labeled with two communication resource types.

6. A composite communication method, comprising:

acquiring packet data compounding at least two communication resource types;

splitting the packaged data into at least first data of a first communication resource type and second data of a second communication resource type different from the first data according to the communication resource types;

modulating the first data to generate a first digital baseband signal;

compounding at least the first digital baseband signal and the second digital baseband signal to generate a first composite digital baseband signal labeled with at least two communication resource types;

amplifying the power of the second analog baseband signal to generate a second radio frequency signal different from the first radio frequency signal;

transmitting a first radio frequency signal and a second radio frequency signal;

the method includes the steps of compounding at least a first digital baseband signal and a second digital baseband signal to generate a first compound digital baseband signal labeled with at least two communication resource types, specifically:

7. A BBU composite communication system, comprising:

the common forward-transmitting card is used for compounding at least the first digital baseband signal and the second digital baseband signal to generate a first compound digital baseband signal labeled with at least two communication resource types;

the method includes that at least a first digital baseband signal and a second digital baseband signal are compounded to generate a first compound digital baseband signal labeled with at least two communication resource types, and the method is specifically used for:

8. A dual-mode RRU composite communication system, comprising:

the second radio frequency module is used for amplifying the power of the second analog baseband signal and generating a second radio frequency signal different from the first radio frequency signal;

the dual-mode RRU composite communication system is connected with the BBU composite module through an optical fiber;

the BBU composite module is used for modulating first data and generating a first digital baseband signal; the second data modulator is also used for modulating the second data to generate a second digital baseband signal different from the first digital baseband signal; the first digital baseband signal and the second digital baseband signal are compounded to generate a first compound digital baseband signal labeled with at least two communication resource types;

the at least first digital baseband signal and the second digital baseband signal are combined to generate a first composite digital baseband signal labeled with at least two communication resource types, and the method is specifically used for: identifying a first delay weight of the first digital baseband signal and a second delay weight of the second digital baseband signal; reordering the first digital baseband signal of the first time delay weight and the second digital baseband signal of the second time delay weight according to the time delay weight; and compounding the sequenced first digital baseband signal and the second digital baseband signal to generate a first composite digital baseband signal labeled with two communication resource types.