CN115209479A

CN115209479A - Data transmission method, baseband unit, radio remote unit and network system

Info

Publication number: CN115209479A
Application number: CN202110393405.6A
Authority: CN
Inventors: 李泽丽; 王牧云
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Shanghai ICT Co Ltd; CM Intelligent Mobility Network Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Shanghai ICT Co Ltd; CM Intelligent Mobility Network Co Ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2022-10-18

Abstract

The invention provides a data transmission method, a baseband unit, a radio remote unit and a network system. The method comprises the following steps: framing the cellular data and the IP service data to obtain a CPRI frame, and transmitting the CPRI frame to a radio remote unit; and/or, receiving a CPRI frame transmitted by a radio remote unit, transmitting cellular data carried in the CPRI frame to a core network, and transmitting IP service data carried in the CPRI frame to a service processing platform; the control time slot corresponding to the first part of sub-channels in the frame structure of the CPRI frame carries cellular data, and the control time slot corresponding to the second part of sub-channels in the frame structure of the CPRI frame carries IP service data. The reserved control time slot in the CPRI frame structure for multiplexing transmission of the cellular data transmits the IP service data, thereby realizing the uniform transmission of the cellular data and the IP service data; the indoor coverage network infrastructure can be reused, and the repeated construction of an IP service system is avoided.

Description

Data transmission method, baseband unit, radio remote unit and network system

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method, a baseband unit, a remote radio unit, and a network system.

Background

With the continuous increase of 5G service types and the continuous expansion of industry boundaries, the industry predicts that 70% of mobile services in the vertical industry will occur indoors in the future. Therefore, the 5G era indoor mobile network is of great importance. In order to meet the requirements of optimal user experience, efficient operation and maintenance and intelligent operation, a digital indoor network needs to be built in the 5G era, and the 5G era has the capabilities of flexible expansion, visual management and operation so as to support rich indoor 5G services such as ultra-wideband, large connection, ultra-low time delay, indoor positioning and video monitoring. The diversified service requirements of the vertical industry cause the indoor environment to become the scene with the most frequent information exchange, and various communication systems such as cellular networks, bluetooth, UWB (Ultra Wide Band), video monitoring and the like coexist, so that the construction difficulty is increased, the construction cost is high, and the difficulty of information receiving and gathering is also greatly increased.

The existing functional systems such as room covering, indoor positioning and video monitoring need to be deployed independently to realize respective functions, so that the space and cables of front-end equipment are used more, and cost saving is not facilitated.

Disclosure of Invention

The invention aims to provide a data transmission method, a baseband unit, a radio remote unit and a network system, which are used for solving the problem of resource waste caused by independent deployment of communication systems in various vertical industries in the prior art.

To achieve the above object, an embodiment of the present invention provides a data transmission method, applied to a baseband unit, including:

framing the cellular data and the IP service data to obtain a Common Public Radio Interface (CPRI) frame, and transmitting the CPRI frame to a Radio remote unit;

and/or

Receiving a CPRI frame transmitted by a radio remote unit, transmitting cellular data carried in the CPRI frame to a core network, and transmitting IP service data carried in the CPRI frame to a service processing platform;

wherein, the control timeslot corresponding to the first part of sub-channels in the frame structure of the CPRI frame carries the cellular data, and the control timeslot corresponding to the second part of sub-channels in the frame structure of the CPRI frame carries the IP service data.

Optionally, the framing the cellular data and the IP service data to obtain a common public radio interface CPRI frame includes:

framing first cellular data transmitted by a core network and first IP service data transmitted by a service processing platform to obtain a first CPRI frame;

the control timeslot corresponding to the first part of sub-channels in the frame structure of the first CPRI frame carries the first cellular data, and the control timeslot corresponding to the second part of sub-channels in the frame structure of the first CPRI frame carries the first IP service data.

Optionally, transmitting the CPRI frame to a radio remote unit includes:

and transmitting the first CPRI frame to a radio remote unit through a CPRI interface.

Optionally, the method further comprises:

performing baseband processing on the first cellular data;

calculating channel parameters of the second part of sub-channels according to the first IP service data;

the framing the first cellular data transmitted by the core network and the first IP service data transmitted by the service processing platform to obtain the first CPRI frame includes:

and framing the first cellular data after baseband processing and the first IP service data according to the channel parameters to obtain the first CPRI frame.

Optionally, the receiving the CPRI frame transmitted by the radio remote unit includes:

receiving a second CPRI frame transmitted by the RRU through a CPRI interface;

wherein, the control timeslot corresponding to the first part of sub-channels in the frame structure of the second CPRI frame carries second cellular data, and the control timeslot corresponding to the second part of sub-channels in the frame structure of the second CPRI frame carries second IP service data.

Optionally, transmitting the cellular data carried in the CPRI frame to a core network, and transmitting the IP service data carried in the CPRI frame to a service processing platform, includes:

performing deframing processing on the second CPRI frame to obtain second cellular data and second IP service data;

and transmitting the second cellular data to a core network after baseband processing is carried out on the second cellular data, and transmitting the second IP service data to a service processing platform.

To achieve the above object, an embodiment of the present invention provides a data transmission method applied to a radio remote unit, including:

framing cellular data and IP service data to obtain a CPRI frame, and transmitting the CPRI frame to a baseband unit;

and/or

Receiving a CPRI frame transmitted by a baseband unit, transmitting cellular data carried in the CPRI frame to a terminal, and transmitting IP service data carried in the CPRI frame to an Internet of Things (IOT) subsystem;

the control time slot corresponding to the first part of sub-channels in the frame structure of the CPRI frame carries the cellular data, and the control time slot corresponding to the second part of sub-channels in the frame structure of the CPRI frame carries the IP service data.

Optionally, the framing the cellular data and the IP service data to obtain a CPRI frame includes:

framing second cellular data transmitted by the terminal and second IP service data transmitted by the IOT subsystem to obtain a second CPRI frame;

and the control time slot corresponding to the first part of sub-channels in the frame structure of the second CPRI frame carries the second cellular data, and the control time slot corresponding to the second part of sub-channels in the frame structure of the second CPRI frame carries the second IP service data.

Optionally, transmitting the CPRI frame to a baseband unit includes:

and transmitting the second CPRI frame to a baseband unit through a CPRI interface.

Optionally, the method further comprises:

performing radio frequency processing on the second cellular data;

calculating channel parameters of the second part of sub-channels according to the second IP service data;

the framing the second cellular data transmitted by the terminal and the second IP service data transmitted by the IOT subsystem to obtain a second CPRI frame includes:

and framing the second cellular data after the radio frequency processing and the second IP service data according to the channel parameters to obtain a second CPRI frame.

Optionally, the receiving the CPRI frame transmitted by the baseband unit includes:

receiving a first CPRI frame transmitted by the baseband unit through a CPRI interface;

the control time slot corresponding to the first part of sub-channels in the frame structure of the first CPRI frame carries first cellular data, and the control time slot corresponding to the second part of sub-channels in the frame structure of the first CPRI frame carries first IP service data.

Optionally, the transmitting the cellular data carried in the CPRI frame to the terminal, and transmitting the IP service data carried in the CPRI frame to the IOT subsystem includes:

performing frame decoding processing on the first CPRI frame to obtain first cellular data and first IP service data;

and transmitting the first cellular data after frequency modulation processing to a terminal, and transmitting the first IP service data to an IOT subsystem.

To achieve the above object, an embodiment of the present invention provides a baseband unit, including:

the first processing module is used for framing the cellular data and the IP service data to obtain a Common Public Radio Interface (CPRI) frame and transmitting the CPRI frame to a radio remote unit;

and/or

The second processing module is used for receiving a CPRI frame transmitted by a radio remote unit, transmitting cellular data carried in the CPRI frame to a core network, and transmitting IP service data carried in the CPRI frame to a service processing platform;

Optionally, the first processing module includes:

the frame structure processing module is used for framing the first cellular data transmitted by the core network and the first IP service data transmitted by the service processing platform to obtain a first CPRI frame;

Optionally, the first processing module further includes:

and the CPRI interface is used for transmitting the first CPRI frame to a radio remote unit.

Optionally, the baseband unit further includes:

a baseband processing module, configured to perform baseband processing on the first cellular data;

the resource management module is used for calculating the channel parameters of the second part of sub-channels according to the first IP service data;

the frame structure processing module is specifically configured to: and framing the first cellular data subjected to baseband processing and the first IP service data according to the channel parameters to obtain the first CPRI frame.

Optionally, the second processing module includes:

a CPRI interface for receiving a second CPRI frame transmitted by the radio remote unit;

and the control time slot corresponding to the first part of sub-channels in the frame structure of the second CPRI frame carries second cellular data, and the control time slot corresponding to the second part of sub-channels in the frame structure of the second CPRI frame carries second IP service data.

Optionally, the second processing module further includes:

a frame structure processing module, configured to perform de-framing processing on the second CPRI frame to obtain second cellular data and second IP service data;

the baseband processing module is used for performing baseband processing on the second cellular data and transmitting the second cellular data to a core network;

and the resource management module is used for transmitting the second IP service data to a service processing platform.

To achieve the above object, an embodiment of the present invention provides a remote radio unit, including:

the third processing module is used for framing the cellular data and the IP service data to obtain a CPRI frame and transmitting the CPRI frame to the baseband unit;

and/or

A fourth processing module, configured to receive a CPRI frame transmitted by a baseband unit, transmit cellular data carried in the CPRI frame to a terminal, and transmit IP service data carried in the CPRI frame to an IOT subsystem;

Optionally, the third processing module includes:

the frame structure processing module is used for framing the second cellular data transmitted by the terminal and the second IP service data transmitted by the IOT subsystem to obtain a second CPRI frame;

wherein, the control timeslot corresponding to the first part of sub-channels in the frame structure of the second CPRI frame carries the second cellular data, and the control timeslot corresponding to the second part of sub-channels in the frame structure of the second CPRI frame carries the second IP service data.

Optionally, the third processing module further includes:

and the CPRI interface is used for transmitting the second CPRI frame to a baseband unit.

Optionally, the remote radio unit further includes:

a radio frequency processing module, configured to perform radio frequency processing on the second cellular data;

the resource management module is used for calculating the channel parameters of the second part of sub-channels according to the second IP service data;

the frame structure processing module is specifically configured to: and framing the second cellular data after the radio frequency processing and the second IP service data according to the channel parameters to obtain a second CPRI frame.

Optionally, the fourth processing module includes:

a CPRI interface for receiving a first CPRI frame transmitted by the baseband unit;

the control timeslot corresponding to the first part of sub-channels in the frame structure of the first CPRI frame carries first cellular data, and the control timeslot corresponding to the second part of sub-channels in the frame structure of the first CPRI frame carries first IP service data.

Optionally, the fourth processing module includes:

the frame structure processing module is used for performing de-framing processing on the first CPRI frame to obtain first cellular data and first IP service data;

the radio frequency processing module is used for transmitting the first cellular data to a terminal after frequency modulation processing;

and the resource management module is used for transmitting the first IP service data to the IOT subsystem.

To achieve the above object, an embodiment of the present invention provides a network system, which includes the baseband unit and the remote radio unit;

the base band unit is in communication connection with a core network, the radio remote unit is in communication connection with a terminal, and the base band unit is connected with the radio remote unit through a CPRI interface optical fiber;

the network system further includes: a service processing platform and an IOT subsystem;

the baseband unit is connected with the service processing platform, and the remote radio unit is connected with the IOT subsystem.

To achieve the above object, an embodiment of the present invention provides a baseband unit, including: a transceiver and a processor;

the processor is configured to: framing the cellular data and the IP service data to obtain a Common Public Radio Interface (CPRI) frame; the transceiver is to: transmitting the CPRI frame to a radio remote unit;

and/or

The transceiver is to: receiving a CPRI frame transmitted by a radio remote unit, transmitting cellular data carried in the CPRI frame to a core network, and transmitting IP service data carried in the CPRI frame to a service processing platform;

Optionally, the processor performs framing processing on the cellular data and the IP service data to obtain a common public radio interface CPRI frame, and specifically includes:

Optionally, when the transceiver 1220 transmits the CPRI frame to the remote radio unit, the transceiver is specifically configured to:

Optionally, the processor is further configured to:

performing baseband processing on the first cellular data;

and framing the first cellular data subjected to baseband processing and the first IP service data according to the channel parameters to obtain the first CPRI frame.

Optionally, when the transceiver 1220 receives a CPRI frame transmitted by a radio remote unit, the transceiver is specifically configured to: receiving a second CPRI frame transmitted by the radio remote unit through a CPRI interface;

Optionally, the processor 1210 is specifically configured to: performing deframing processing on the second CPRI frame to obtain second cellular data and second IP service data;

the transceiver 1220 is specifically configured to: and transmitting the second cellular data to a core network after baseband processing is carried out on the second cellular data, and transmitting the second IP service data to a service processing platform.

To achieve the above object, an embodiment of the present invention provides a remote radio unit, including: a transceiver and a processor;

the processor is configured to: framing the cellular data and the IP service data to obtain a CPRI frame; the transceiver is to: transmitting the CPRI frame to a baseband unit;

and/or

The transceiver is to: receiving a CPRI frame transmitted by a baseband unit, transmitting cellular data carried in the CPRI frame to a terminal, and transmitting IP service data carried in the CPRI frame to an IOT subsystem;

Optionally, the processor 1410 performs framing processing on the cellular data and the IP service data, and when obtaining the CPRI frame, the processor is specifically configured to:

framing the second cellular data transmitted by the terminal and the second IP service data transmitted by the IOT subsystem to obtain a second CPRI frame;

Optionally, the transceiver 1420 transmits the CPRI frame to a baseband unit, specifically to: and transmitting the second CPRI frame to a baseband unit through a CPRI interface.

Optionally, the processor 1410 is further configured to:

performing radio frequency processing on the second cellular data;

and framing the second cellular data after the radio frequency processing and the second IP service data according to the channel parameter to obtain the second CPRI frame.

Optionally, the transceiver 1420 is configured to receive a CPRI frame transmitted by a baseband unit, and specifically configured to: receiving a first CPRI frame transmitted by the baseband unit through a CPRI interface;

Optionally, the processor 1410 is further configured to: performing de-framing processing on the first CPRI frame to obtain first cellular data and first IP service data;

the transceiver 1420 is configured to perform frequency modulation processing on the first cellular data and transmit the first cellular data to a terminal, and transmit the first IP service data to an IOT subsystem.

To achieve the above object, an embodiment of the present invention further provides a baseband unit, including: a transceiver, a processor, a memory, and a program or instructions stored on the memory and executable on the processor; the processor implements the above-described data transmission method applied to the baseband unit when executing the program or the instructions.

To achieve the above object, an embodiment of the present invention further provides a remote radio unit, including: a transceiver, a processor, a memory, and a program or instructions stored on the memory and executable on the processor; when the processor executes the program or the instruction, the data transmission method applied to the remote radio unit is realized.

To achieve the above object, an embodiment of the present invention provides a readable storage medium, on which a program or instructions are stored, which when executed by a processor implement the steps in the data transmission method as described above.

The technical scheme of the invention has the following beneficial effects:

in the embodiment of the application, when the baseband unit performs data transmission, in the frame structures of the CPRI frame obtained by framing cellular data and IP service data and the received CPRI frame transmitted by the radio remote unit, part of the control time slots are used for bearing the cellular data, and part of the control time slots are used for bearing the IP service data, so that the control time slots in the CPRI frame structure for multiplexing the cellular data are multiplexed, a link for multiplexing the cellular data is multiplexed, and uniform transmission of the cellular data and the IP service data is realized; and further, the indoor coverage network infrastructure can be reused, and the repeated construction of an IP service system is avoided.

Drawings

Fig. 1 is a schematic flowchart of a data transmission method applied to a baseband unit according to an embodiment of the present invention;

fig. 2 is a second flowchart of a data transmission method applied to a baseband unit according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a baseband unit according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating host nesting of a basic frame into a UMTS radio frame in accordance with an embodiment of the present invention;

FIG. 5 is a diagram illustrating the relationship between sub-channels and control slots in a super-frame according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a data transmission method applied to a remote radio unit according to an embodiment of the present invention;

fig. 7 is a second flowchart illustrating a data transmission method applied to a remote radio unit according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a remote radio unit according to an embodiment of the present invention;

fig. 9 is a flowchart illustrating a data transmission method between a baseband unit and a remote radio unit according to an embodiment of the present invention;

fig. 10 is a second flowchart illustrating a data transmission method between a baseband unit and a remote radio unit according to a second embodiment of the present invention;

fig. 11 is a schematic structural diagram of a network system according to an embodiment of the present invention;

FIG. 12 is a second schematic structural diagram of a baseband unit according to the embodiment of the present invention;

FIG. 13 is a third schematic structural diagram of a baseband unit according to an embodiment of the present invention;

fig. 14 is a second schematic structural diagram of a remote radio unit according to an embodiment of the present invention;

fig. 15 is a third schematic structural diagram of a remote radio unit according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic of the process, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In addition, the terms "system" and "network" are often used interchangeably herein.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

As shown in fig. 1 and fig. 2, a data transmission method according to an embodiment of the present invention is applied to a baseband unit, and includes:

as shown in fig. 1, step 101, framing cellular data and IP service data to obtain a common public radio interface CPRI frame;

step 102, transmitting the CPRI frame to a radio remote unit;

and/or

As shown in fig. 2, step 201, receiving a CPRI frame transmitted by a radio remote unit;

step 202, transmitting the cellular data carried in the CPRI frame to a core network, and transmitting the IP service data carried in the CPRI frame to a service processing platform;

As for the data transmission method shown in fig. 1, the data transmission method may be a method when a baseband unit transmits downlink data to a radio remote unit, the cellular data is transmitted by a core network, and the IP service data is data transmitted by a service processing platform communicatively connected to the baseband unit. The IP service data is data of an IP network communication service, for example: IP telephony, IP television, video on demand, voice chat, electronic commerce, and network gaming, among others. When the baseband unit transmits the cellular data and the IP service data, framing the cellular data and the IP service data to form a CPRI frame, where part of subchannels of the frame structure are used to carry the cellular data and part of subchannels are used to carry the IP service data, so as to multiplex a control timeslot in a conventional CPRI frame structure for transmitting cellular data, and implement hybrid transmission of the cellular data and the IP service data in the CPRI frame structure.

As for the data transmission method shown in fig. 2, the data transmission method may be a method when a baseband unit receives uplink data transmitted by a radio remote unit, where the baseband unit receives a CPRI frame transmitted by the radio remote unit, where a frame structure converted from the CPRI frame carries cellular data and IP service data, the cellular data is data sent by a terminal to the radio remote unit, and the IP service data is data sent by an IOT subsystem communicatively connected to the radio remote unit. The baseband unit de-frames the CPRI frame after receiving the CPRI frame transmitted by the radio remote unit to obtain the cellular data and the IP service data, the baseband unit transmits the cellular data to a core network and transmits the IP service data to a service processing platform which is in communication connection with the baseband unit, so that the core network can receive the cellular data transmitted by the radio remote unit through a terminal and coordinate and control the cellular data flow from the terminal.

The first part of sub-channels in the frame structure of the CPRI frame may be existing sub-channels for transmitting cellular data, and the second part of sub-channels in the frame structure of the CPRI frame may be sub-channels where idle timeslots reserved in the CPRI frame are located. That is, in the frame structure of the CPRI frame, the cellular data can be transmitted according to the existing bearer location, and the IP service data is transmitted using the idle reserved control slot in the CPRI frame structure.

In this embodiment, the baseband unit further supports CPRI framing and de-framing processing of cellular data and IP service data based on a baseband processing function of a conventional small station on the cellular data, and supports offloading processing of the cellular data and the IP service data. The remote radio unit further supports an external IOT subsystem based on a radio frequency processing function of a traditional small station on cellular data, performs CPRI framing and unframing on the cellular data and IP service data, and can provide Power Over Ethernet (POE) Power supply capability for the downlink IOT subsystem. The service processing platform comprises a positioning resolving module, a video coding and decoding module, a service network management module and other service processing engines. The IOT subsystem reserves an external interface through the remote radio unit, and supports the docking of various IP systems, such as a positioning base station, a bluetooth beacon, a WiFi AP (Access Point), a video acquisition system, and the like.

In the embodiment of the application, in the frame structures of the CPRI frame obtained by framing cellular data and IP service data and the received CPRI frame transmitted by the radio remote unit when the baseband unit transmits data, part of the control timeslots are used for carrying the cellular data and part of the control timeslots are used for carrying the IP service data, so that the control timeslots in the CPRI frame structure for multiplexing the cellular data are multiplexed, and the link for multiplexing the cellular data is multiplexed, thereby realizing the uniform transmission of the cellular data and the IP service data; further, the indoor coverage network infrastructure can be reused, and repeated construction of an IP service system is avoided.

As an optional embodiment, the framing the cellular data and the IP service data to obtain a common public radio interface CPRI frame may include: framing first cellular data transmitted by a core network and first IP service data transmitted by a service processing platform to obtain a first CPRI frame; wherein, the control timeslot corresponding to the first part of sub-channels in the frame structure of the first CPRI frame carries the first cellular data, and the control timeslot corresponding to the second part of sub-channels in the frame structure of the first CPRI frame carries the first IP service data.

The transmitting, by the baseband unit, the CPRI frame to a radio remote unit may include: and transmitting the first CPRI frame to a radio remote unit through a CPRI interface.

The baseband unit is communicatively connected to the core network, and may receive first cellular data transmitted by the core network, and may receive first IP service data transmitted by a service processing platform communicatively connected to the baseband unit, and obtain the first CPRI frame after framing the first cellular data and the first IP service data. As shown in fig. 3, the baseband unit has a CPRI interface, and transmits the first CPRI frame to the radio remote unit through the CPRI interface. The remote radio unit may transmit the first cellular data to a terminal and transmit the first IP data to an IOT subsystem, thereby implementing transmission of core network data to the terminal and IP service data to an IP service processing system (here, referred to as the IOT subsystem), and implementing hybrid transmission of the cellular data and the IP data.

The following describes the processing procedure of the baseband unit to frame the first cellular data and the first IP service data.

Specifically, the method may further include: performing baseband processing on the first cellular data; and calculating the channel parameters of the second part of sub-channels according to the first IP service data. The framing the first cellular data transmitted by the core network and the first IP service data transmitted by the service processing platform to obtain the first CPRI frame includes: and framing the first cellular data after baseband processing and the first IP service data according to the channel parameters to obtain the first CPRI frame.

As shown in fig. 3, the baseband unit includes a baseband processing module and a resource management module, after receiving first cellular data transmitted by a core network and first IP service data transmitted by a service processing platform, the baseband processing module performs baseband processing on the first cellular data, and the resource management module calculates a channel parameter of a subchannel that carries the first IP service data according to a data amount of the first IP service data, where the channel parameter may be a serial number of the subchannel. It should be noted that the sub-channel carrying the first cell data may be determined by using an existing CPRI frame structure for transmitting cell data. The baseband unit further includes: and after determining the sub-channel carrying the first IP service data and the sub-channel carrying the first cellular data, the frame structure processing module may perform framing on the first IP service data and the first cellular data to obtain the first CPRI frame, and transmit the first CPRI frame to the radio remote unit through the CPRI interface.

The CPRI frame structure for transmitting the cellular data includes the following 4 main information flows: I/Q data (referring to the raw digital stream that describes the amplitude and phase of a wide frequency range signal), synchronization information, protocol control information, vendor-defined information. Based on the CPRI protocol, a host nesting diagram from a basic frame to a UMTS (Universal Mobile Telecommunications System) radio frame is shown in fig. 4: one CPRI 10ms frame contains 150 superframes, each superframe contains 256 basic frames, each basic frame includes 16 slots, denoted as W =0 \ 823015, where W0 is a control slot and W1-W15 are slots for transmitting I/Q data (i.e., user data).

There are 256 basic frames in a superframe, and there are 256 control slots in total. In the CPRI protocol, a channel (i.e., a subchannel) is formed by every four control timeslots, and totally 64 subchannels (the subchannel number Ns is from 0 to 63) are formed, where the sequence numbers Xs of 4 control timeslots in each subchannel are: 0-3, such that X =64 xs + ns is the number of control slots in the superframe. The control slot transmission information of the CPRI subchannel includes: synchronizing timing information, control and management information (C & M), vendor-defined information, and reserving some reserved control slots.

In the embodiment of the application, when data is transmitted, the reserved control time slot in the CPRI frame structure for transmitting cellular data is utilized to realize the transmission of the hybrid data. The diagram of the relationship between the sub-channels and the control slots in the super-frame is shown in fig. 5: the control time slots included in the sub-channels 3 to 15 in each superframe are reserved control time slots after cellular data is carried in a frame structure of a CPRI frame, and different transmission resources can be configured for different IP service data based on service bandwidth by determining different sub-channel parameters, for example, when indoor positioning and video monitoring services are extended, a sub-channel parameter t can be set, the control time slots included in the sub-channels 3 to t are used for transmitting video service data, the control time slots included in the sub-channels t +1 to 14 are used for transmitting positioning service data, and the like, and the sub-channels 15 are used for storing sub-channel sequence information for transmitting different services. When single IP service data can be set to be transmitted, the value of t is defaulted to 14, namely, the IP service data is transmitted by using the control time slot corresponding to the subchannel with the serial number of 14; when different IP service data are transmitted, the value of the required subchannel parameter t can be calculated and provided by a resource management module of the baseband unit, t is more than or equal to 3 and less than or equal to 13, and t is a positive integer.

For example: under the condition of a 5G new air interface, the CPRI bandwidth required by a single antenna port is 4.9Gbps under 100MHz, 64TRX is adopted in a 5G system, and the CPRI rate is required to be higher, for example, 320Gbps is required under 100 MHz. According to the current mainstream standard of the ultra-high-definition video industry, the requirement of 4K/8K video on the network rate is about 12-40Mbps. It is sufficient to use CPRI port to transmit IP data with large bandwidth.

Therefore, the baseband unit realizes multiplexing of idle reserved control time slots in a CPRI frame for transmitting cellular data by determining channel parameters (such as subchannel serial numbers) of a subchannel for transmitting the first IP data, realizes hybrid transmission of the cellular data and IP service data, can realize allocating different transmission resources for service data of different service systems based on the bandwidth of the IP service, and realizes unified return transmission of the cellular data and the IP data by multiplexing links of cell-based substations, thereby saving data transmission resources.

As another alternative embodiment, the receiving the CPRI frame transmitted by the radio remote unit may include: receiving a second CPRI frame transmitted by the radio remote unit through a CPRI interface; and the control time slot corresponding to the first part of sub-channels in the frame structure of the second CPRI frame carries second cellular data, and the control time slot corresponding to the second part of sub-channels in the frame structure of the second CPRI frame carries second IP service data.

Transmitting the cellular data carried in the CPRI frame to a core network, and transmitting the IP service data carried in the CPRI frame to a service processing platform, may include: performing de-framing processing on the second CPRI frame to obtain second cellular data and second IP service data; and transmitting the second cellular data to a core network after baseband processing is carried out on the second cellular data, and transmitting the second IP service data to a service processing platform.

The second cellular data may be data transmitted by the terminal to the remote radio unit, and the second IP service data may be IP service data transmitted by an IOT subsystem communicatively connected to the remote radio unit. And the baseband unit and the radio remote unit transmit CPRI frames through a CPRI interface. After the remote radio unit receives second cellular data transmitted by a terminal and second IP service data transmitted by an IOT subsystem, framing the second cellular data and the second IP service data to obtain a second CPRI frame, and transmitting the second CPRI frame to the baseband unit. After receiving the second CPRI frame, a frame structure processing module of the baseband unit deframes the second CPRI frame to obtain the second cellular data and the second IP service data, transmits the second cellular data to a baseband processing module for baseband processing, and sends the second cellular data to a core network; and the frame structure processing module transmits the second IP service data to the resource management module, and the resource management module distributes the received IP service data to each service processing engine of the service processing platform according to the service type for corresponding processing.

In this embodiment, the baseband unit obtains the second cellular data of the terminal and the second IP service data of the IOT subsystem by deframing the second CPRI frame transmitted by the radio remote unit. In the frame structure of the second CPRI frame, the second IP service data may be carried in a reserved control timeslot of the CPRI frame structure, and a channel parameter of a second partial sub-channel in the frame structure of the second CPRI frame for carrying the second IP service data may be determined by a resource management module of the radio remote unit. The frame structure of the second cellular data and the second IP service data in the second CPRI frame is similar to the frame structure of the first CPRI frame, and is not described herein again.

The second IP service data multiplexes the idle reserved control time slot in the second CPRI frame for transmitting the cellular data, realizes the hybrid transmission of the cellular data and the IP service data, can realize the bandwidth based on the IP service, configures different transmission resources for the service data of different service systems, multiplexes the link for transmitting the cellular data by the cell sub-station, realizes the uniform return of the cellular data and the IP data, and saves the data transmission resources.

In the embodiment of the application, in the frame structure of the CPRI frame obtained by framing cellular data and IP service data and the received CPRI frame transmitted by the radio remote unit when the baseband unit is performing data transmission, part of the control timeslots are used for carrying the cellular data and part of the control timeslots are used for carrying the IP service data, so that the control timeslots in the CPRI frame structure for multiplexing transmission of the cellular data are multiplexed, and the link for multiplexing transmission of the cellular data is multiplexed, thereby realizing unified transmission of the cellular data and the IP service data; further, the indoor coverage network infrastructure can be reused, and repeated construction of an IP service system is avoided.

As shown in fig. 6 and fig. 7, a data transmission method according to an embodiment of the present invention is applied to a radio remote unit, and includes:

as shown in fig. 6, step 601, perform framing processing on the cellular data and the IP service data to obtain a CPRI frame;

step 602, transmitting the CPRI frame to a baseband unit;

and/or

As shown in fig. 7, step 701 receives a CPRI frame transmitted by a baseband unit;

step 702, transmitting the cellular data carried in the CPRI frame to a terminal, and transmitting the IP service data carried in the CPRI frame to an IOT subsystem;

As for the data transmission method shown in fig. 6, the data transmission method may be a method when the remote radio unit transmits uplink data to the baseband unit, the cellular data is transmitted by a terminal, and the IP service data is transmitted by an IOT subsystem communicatively connected to the remote radio unit. When the radio remote unit transmits the cellular data and the IP service data, framing the cellular data and the IP service data to form a CPRI frame, where part of subchannels of the frame structure are used to carry the cellular data and part of subchannels are used to carry the IP service data, so as to multiplex a control timeslot in a conventional CPRI frame structure for transmitting cellular data, and implement hybrid transmission of the cellular data and the IP service data in the CPRI frame structure.

As for the data transmission method shown in fig. 7, the data transmission method may be a method when a radio remote unit receives downlink data transmitted by a baseband unit, where the radio remote unit receives a CPRI frame transmitted by the baseband unit, where a frame structure converted from the CPRI frame carries cellular data and IP service data, the cellular data is data sent by a core network to the baseband unit, and the IP service data is data sent by a service processing platform communicatively connected to the baseband unit. After receiving the CPRI frame transmitted by the baseband unit, the radio remote unit deframes the CPRI frame to obtain the cellular data and the IP service data, and transmits the cellular data to a terminal and transmits the IP service data to an IOT subsystem in communication connection with the radio remote unit, so that the terminal can receive the cellular data transmitted by a core network through the baseband unit.

In this embodiment, the remote radio unit further supports an external IOT subsystem based on a radio frequency processing function of a conventional small station on cellular data, performs CPRI framing and deframing on the cellular data and IP service data, and can provide POE power supply capability for a downstream IOT subsystem. The base band unit further supports CPRI framing and de-framing processing of cellular data and IP service data based on a base band processing function of the traditional small station on the cellular data, and supports shunting processing of the cellular data and the IP service data. The service processing platform comprises a positioning resolving module, a video coding and decoding module, a service network management module and other service processing engines. The IOT subsystem reserves external interfaces through the radio remote unit and supports the butt joint of various IP systems, such as a positioning base station, a Bluetooth beacon, a WiFi AP, a video acquisition system and the like.

In the embodiment of the application, in the frame structures of the CPRI frame obtained by framing cellular data and IP service data and the received CPRI frame transmitted by the baseband unit when the radio remote unit transmits data, part of the control timeslots are used for carrying cellular data and part of the control timeslots are used for carrying IP service data, so that the control timeslots in the CPRI frame structure for multiplexing transmission of cellular data and the links for multiplexing transmission of cellular data realize the unified transmission of cellular data and IP service data; and further, the indoor coverage network infrastructure can be reused, and the repeated construction of an IP service system is avoided.

As an optional embodiment, the framing the cellular data and the IP service data to obtain the CPRI frame includes: framing the second cellular data transmitted by the terminal and the second IP service data transmitted by the IOT subsystem to obtain a second CPRI frame; and the control time slot corresponding to the first part of sub-channels in the frame structure of the second CPRI frame carries the second cellular data, and the control time slot corresponding to the second part of sub-channels in the frame structure of the second CPRI frame carries the second IP service data.

The radio remote unit transmits the CPRI frame to a baseband unit, including: and transmitting the second CPRI frame to a baseband unit through a CPRI interface.

The radio remote unit is in communication connection with the terminal, and may receive second cellular data transmitted by the terminal, and may receive second IP service data transmitted by an IOT subsystem in communication connection with the radio remote unit, and obtain the second CPRI frame after framing the second cellular data and the second IP service data.

As shown in fig. 8, the radio remote unit has a CPRI interface, and transmits the second CPRI frame to the baseband unit through the CPRI interface. The baseband unit may transmit the second cellular data to a core network and transmit the second IP data to a service processing platform, so as to implement transmission of data of a terminal to the core network and transmission of IP service data to the IP service processing platform, thereby implementing hybrid transmission of the cellular data and the IP data.

The following describes a process of framing the second cellular data and the second IP service data by the remote radio unit.

Specifically, the method may further include: performing radio frequency processing on the second cellular data; calculating channel parameters of the second part of sub-channels according to the second IP service data; the framing the second cellular data transmitted by the terminal and the second IP service data transmitted by the IOT subsystem to obtain the second CPRI frame may include: and framing the second cellular data after the radio frequency processing and the second IP service data according to the channel parameter to obtain the second CPRI frame.

As shown in fig. 8, the remote radio unit includes a radio frequency processing module and a resource management module, and the remote radio unit receives second cellular data transmitted by the terminal through the antenna module, and after receiving second IP service data transmitted by the IOT subsystem, the radio frequency processing module performs radio frequency signal processing on the second cellular data, and after filtering and amplifying a signal from the antenna module, down-converts the radio frequency signal, and converts the radio frequency signal into a digital signal through an analog-to-digital converter. The resource management module calculates a channel parameter of a sub-channel carrying the second IP service data according to the data size of the second IP service data (including service data and network management data of each service), where the channel parameter may be a serial number of the sub-channel. It should be noted that the sub-channel carrying the second cell data may be determined by using an existing CPRI frame structure for transmitting cell data. The remote radio unit further comprises: and a frame structure processing module, configured to, after determining the sub-channel carrying the second IP service data and the sub-channel carrying the second cellular data, perform framing on the second IP service data and the second cellular data through the frame structure processing module to obtain the second CPRI frame, and transmit the second CPRI frame to the baseband unit through the CPRI interface.

The frame structure of the second CPRI frame is shown in fig. 4 and fig. 5, and is not described herein again.

The radio frequency unit realizes multiplexing of idle reserved control time slots in CPRI frames for transmitting cellular data by determining channel parameters (such as subchannel serial numbers) of subchannels for transmitting second IP data, realizes hybrid transmission of the cellular data and IP service data, can realize allocating different transmission resources for service data of different service systems based on bandwidth of IP service, multiplexes links for transmitting the cellular data by small stations in a multiplexing room, realizes uniform return of the cellular data and the IP data, and saves data transmission resources.

As another optional embodiment, the receiving the CPRI frame transmitted by the baseband unit includes: receiving a first CPRI frame transmitted by the baseband unit through a CPRI interface; the control time slot corresponding to the first part of sub-channels in the frame structure of the first CPRI frame carries first cellular data, and the control time slot corresponding to the second part of sub-channels in the frame structure of the first CPRI frame carries first IP service data.

Transmitting the cellular data carried in the CPRI frame to the terminal, and transmitting the IP service data carried in the CPRI frame to the IOT subsystem, may include: performing frame decoding processing on the first CPRI frame to obtain first cellular data and first IP service data; and transmitting the first cellular data after frequency modulation processing to a terminal, and transmitting the first IP service data to an IOT subsystem.

The first cellular data may be data transmitted by a core network to the baseband unit, and the first IP service data may be IP service data transmitted by a service processing platform communicatively connected to the baseband unit.

And the radio remote unit and the baseband unit transmit CPRI frames through a CPRI interface. After receiving first cellular data transmitted by a core network and first IP service data transmitted by a service processing platform, the baseband unit frames the first cellular data and the first IP service data to obtain a first CPRI frame, and transmits the first CPRI frame to the radio remote unit. After receiving the first CPRI frame, a frame structure processing module of the radio remote unit deframes the first CPRI frame to obtain the first cellular data and the first IP service data, transmits the first cellular data to a radio frequency processing module, and modulates a digital signal to a transmission frequency band by the radio frequency processing module, and transmits the digital signal to a terminal through an antenna module after filtering and amplifying the digital signal; and the frame structure processing module transmits the first IP service data to the resource management module, and the resource management module distributes the received IP service data to the IOT subsystem according to the service type. The antenna module is used for processing cellular data of the terminal.

Optionally, as shown in fig. 8, the remote radio unit further includes a POE power supply module, which is capable of supplying power to the IOT subsystem device.

In this embodiment, the radio frequency unit obtains the first cellular data of the core network and the first IP service data of the service processing platform by deframing the first CPRI frame transmitted by the baseband unit. In the frame structure of the first CPRI frame, the first IP service data may be carried in a reserved control timeslot of the CPRI frame structure, and a channel parameter of a second partial sub-channel in the frame structure of the first CPRI frame for carrying the first IP service data may be determined by a resource management module of a baseband unit. The frame structure of the first cellular data and the first IP service data in the first CPRI frame is similar to the frame structure of the second CPRI frame, and is not described herein again.

The idle reserved control time slot in the first CPRI frame of the first IP service data multiplexing transmission cellular data realizes the mixed transmission of the cellular data and the IP service data, can realize the bandwidth based on the IP service, configures different transmission resources for the service data of different service systems, multiplexes the link of the cellular data transmitted by the sub-station of the room, realizes the uniform return of the cellular data and the IP data, and saves the data transmission resources.

In the embodiment of the application, in the frame structures of the CPRI frame obtained by framing cellular data and IP service data and the received CPRI frame transmitted by the baseband unit when the radio remote unit transmits data, part of the control timeslots are used for carrying cellular data and part of the control timeslots are used for carrying IP service data, so that the control timeslots in the CPRI frame structure for multiplexing transmission of cellular data and the links for multiplexing transmission of cellular data realize the unified transmission of cellular data and IP service data; further, the indoor coverage network infrastructure can be reused, and repeated construction of an IP service system is avoided.

The following describes a process of data transmission between the baseband unit and the remote radio unit by using a specific embodiment with reference to the accompanying drawings.

As shown in fig. 9, for uplink data transmission, that is, a process in which a terminal transmits data to a core network through a radio remote unit and a baseband unit:

s1: an antenna module of the remote radio unit sends the received second cellular data transmitted by the terminal to a radio frequency processing module, and sends the second cellular data to a frame structure processing module after radio frequency processing is finished;

s2: and the resource management module receives second IP service data transmitted by the IOT subsystem, calculates the size of each IP service data, determines the value of a channel parameter t of a second part of sub-channels bearing the second IP service data, and then transmits the value to the frame structure processing module.

S3: and a frame structure processing module of the radio remote unit combines the second cellular data and each IP service data into a second CPRI frame according to the value of the channel parameter t and the subchannel used in the existing transmission cellular network, and transmits the second CPRI frame to the baseband unit in the optical fiber through the CPRI port.

S4: and the frame structure processing module of the baseband unit receives the second CPRI frame transmitted by the CPRI interface, performs de-framing processing to obtain second cellular data and second IP service data, sends the second cellular data to the baseband processing module, and sends each second IP service data to the resource management module.

S5: after the baseband processing module of the baseband unit finishes the baseband processing of the second cellular data, transmitting the second cellular data to a core network;

s6: and the resource management module sends the second IP service data to the service processing platform, completes the distribution of each IP service data and sends the distributed IP service data to each module corresponding to the service processing platform. For example: and respectively sending the positioning data and the video data to a positioning processing engine and a video coding and decoding module, and sending the network management data to a service network management module.

S7: and after the service processing platform finishes data processing, the data is provided for the upper application platform. For example: after the positioning processing engine and the video encoding and decoding module of the service processing platform complete the processing of the positioning data and the video data, the positioning data and the video data are provided for an upper application platform (such as a front-end display platform), and the network management data of the service network management module can support visual operation and maintenance management and control.

As shown in fig. 10, for downlink data transmission, that is, a process in which the core network transmits data to the terminal through the baseband unit and the radio remote unit:

t1: a baseband processing module of a baseband unit receives first cellular data issued by a core network, and sends the first cellular data to a frame structure processing module after completing baseband processing;

t2: the resource management module of the baseband unit receives first IP service data of a service processing platform, namely network management data from a service network management module, calculates and determines a value of a channel parameter t of a second part of sub-channels required by bearing the first service data according to the size of each service network management data, and sends the value to the frame structure processing module.

T3: and the frame structure processing module of the baseband unit completes framing of the first CPRI frame by using the first cellular data and the first IP service data according to the value of the channel parameter t and the existing subchannel for bearing the cellular data, and transmits the framing to the radio remote unit through the CPRI port.

T4: the frame structure processing module of the radio remote unit completes the frame decoding processing of the first CPRI frame to obtain first cellular data and first IP service data (i.e., network management data), sends the first cellular data to the radio frequency processing module, and sends the first IP service data to the resource management module.

T5: after the radio frequency processing module of the radio remote unit finishes the radio frequency processing of the first cellular data, the first cellular data is sent to the antenna module, and then the first cellular data is sent to the terminal by the antenna module.

T6: the resource management module of the remote radio unit completes the shunting of each IP service data, and sends the first IP service data to each system corresponding to the IOT subsystem, for example: and respectively sending the positioning network management data and the video network management data to a positioning base station and a video acquisition system.

T7: and each system of the IOT subsystem receives network management information data and supports visual operation and maintenance management and control.

The remote radio unit of this embodiment supports other external IOT subsystem equipment through self external interface, for example external UWB basic station, wiFi AP, bluetooth base station, video acquisition system etc. support extension indoor location business and video monitoring business to provide POE power supply ability to external equipment. And the CPRI frame structure group/frame decoding of cellular data and other IP service data is supported, and the uniform return of the cellular data and different IP service data is realized.

The baseband unit of this embodiment supports framing/deframing of the CPRI frame structure of cellular data and other IP service data, and implements offloading of different IP service data, transmits the cellular data to the core network, and transmits the service data to each service processing engine.

In the embodiment, the hybrid transmission of cellular data and IP data is realized through a CPRI interface, and the reserved control field of the traditional CPRI frame structure is multiplexed to realize the transmission of the IP data; and different transmission resources can be configured for the service data of different IOT service systems based on the service bandwidth. And the multiplexing room divides the link of the cell data transmission of the small station to realize the uniform return of the cell data and the IP data.

A baseband unit according to an embodiment of the present invention includes:

and/or

Optionally, as shown in fig. 3, the first processing module includes:

Optionally, the first processing module further includes:

Optionally, the baseband unit further includes:

Optionally, the second processing module includes:

Optionally, the second processing module further includes:

the frame structure processing module is used for performing de-framing processing on the second CPRI frame to obtain second cellular data and second IP service data;

The structure of the baseband unit and the function of each structure are described below by specific embodiments.

As shown in fig. 3, the baseband unit has a CPRI interface (lower connection port): the system is used for a downlink radio remote unit, one baseband unit supports downlink multiple radio remote units, and the downlink radio remote units are externally connected with optical fibers and used for transmitting CPRI frames.

The baseband unit has a frame structure processing module: for the uplink, the CPRI frame transmitted by the radio remote unit is deframed to obtain cellular data and IP service data, the cellular data is sent to the baseband processing module, and the IP service data is sent to the resource management module; and for the downlink, framing the cellular data from the core network and the network management IP service data from the service processing platform according to the calculated frame structure.

The baseband unit has a baseband processing module: the baseband processing functions of the signals are realized, and the functions mainly comprise coding, multiplexing, modulation, spread spectrum and the like.

The baseband unit further comprises a resource management module: for the uplink, the method is used for distributing the received IP service data to each service processing engine according to the service type for processing; for the downlink, receiving IP service data of a service network management module of a service processing platform, calculating the size of the data of different service network management modules, giving required parameter values, and sending the parameter values to a frame structure processing module.

The upper connection port of the baseband unit: and the system supports an uplink electric port or an optical port, and is used for transmitting the cellular data processed by the baseband to a core network and transmitting the IP data to a service processing platform.

It should be noted that the baseband unit provided in the embodiment of the present invention can implement all the method steps implemented in the embodiment of the method applied to the baseband unit, and can achieve the same technical effect, and details of the same parts and beneficial effects as those of the embodiment of the method are not described herein again.

An embodiment of the present invention provides a remote radio unit, including:

and/or

Optionally, as shown in fig. 8, the third processing module includes:

Optionally, the third processing module further includes:

Optionally, the remote radio unit further includes:

the radio frequency processing module is used for carrying out radio frequency processing on the second cellular data;

Optionally, the fourth processing module includes:

a frame structure processing module, configured to perform de-framing processing on the first CPRI frame to obtain first cellular data and first IP service data;

The structure of the remote radio unit and the function of each structure are explained by the specific embodiments.

As shown in fig. 8, the lower port of the remote radio unit: the remote wireless communication system can be externally connected with an IOT subsystem, and can comprise a UWB base station, a WiFi AP, a Bluetooth beacon, a video acquisition system and the like, and one remote radio unit supports a plurality of downlink ports.

The remote radio unit is provided with a POE power supply module: the IOT subsystem equipment is used for providing power supply capacity for the IOT subsystem equipment of the lower power connection port.

The remote radio unit is provided with an antenna module: processing cellular data of the terminal;

a resource management module: for an uplink, receiving IP service data (including service data and network management data of each service) in an IOT subsystem, calculating the data volume of each IP service, and determining the value of a frame structure parameter according to the data volume of each IP service; for the downlink, the network management information of each service is supported to be distributed to the IOT subsystem.

The remote radio unit is also provided with a radio frequency processing module: for an uplink, a radio frequency signal processing function is realized, and a signal from an antenna module is filtered and amplified, then the radio frequency signal is subjected to down-conversion and analog-to-digital conversion to a digital signal; for the downlink, the digital signal is modulated to a transmitting frequency band, filtered and amplified, and then transmitted through an antenna module.

A frame structure processing module: for the uplink, the cellular data passing through the radio frequency processing module and the IP service data from the resource management module are supported to be framed according to the CPRI frame structure; for the downlink, the CPRI frame transmitted by the CPRI interface is deframed to obtain cellular data and network management IP service data, which are respectively sent to the radio frequency processing module and the resource management module.

The remote radio unit has a CPRI interface (upper optical coupling port): the method is used for uplink baseband unit, external optical fiber and CPRI frame transmission.

It should be noted that, the remote radio unit according to the embodiment of the present invention can implement all the method steps implemented by the method embodiment applied to the remote radio unit, and can achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are not repeated herein.

As shown in fig. 11, an embodiment of the present invention provides a network system, which includes the baseband unit and the remote radio unit;

the base band unit is in communication connection with a core network, the radio remote unit is in communication connection with a terminal, and the base band unit and the radio remote unit are connected through a CPRI interface optical fiber;

The baseband unit is connected with a core network optical fiber, and the baseband unit is connected with the radio remote unit through an optical fiber. And cellular data is transmitted between the core network and the baseband unit. The baseband unit and the radio remote unit may transmit a CPRI frame therebetween. And cellular data is transmitted between the remote radio unit and the terminal.

The baseband unit is connected with the service processing platform through an external interface. The service processing platform can comprise: the system comprises a positioning calculation module, a video coding and decoding module, a service network management module and the like, wherein the service processing platform can also comprise other processing modules of a plurality of IP services.

And the remote radio unit is connected with the IOT subsystem through an external interface. The IOT subsystem may include: a plurality of IP service systems such as UWB base station, bluetooth beacon, wiFi AP, video acquisition system.

Specifically, the core network or terminal: the interfacing of the network system proposed by the present application with the core network and the terminals is illustrated in fig. 11, where the core network is responsible for coordinating and controlling the cellular data flow from the terminals.

A baseband unit: based on the baseband processing function of the traditional small station on the cellular data, the method further supports CPRI group/de-frame processing of the cellular data and IP service data, and supports distribution processing of the cellular data and the IP service data. It should be noted that the baseband unit can implement all the method steps implemented by the method embodiment applied to the baseband unit, and can achieve the same technical effect, which is not described herein again.

The radio remote unit: based on the radio frequency processing function of the traditional small station on the cellular data, the method further supports an external IOT subsystem, performs CPRI grouping/deframing on the cellular data and IP service data, and can provide POE power supply capability for a downlink IOT subsystem. It should be noted that the remote radio unit can implement all the method steps implemented by the method embodiment applied to the remote radio unit, and can achieve the same technical effect, which is not described herein again.

The IOT subsystem: and an external interface is reserved through the remote radio unit, and the butt joint of various IP systems such as a positioning base station, a Bluetooth beacon, a WiFi AP (wireless fidelity access point), a video acquisition system and the like is supported.

A service processing platform: the system can comprise a positioning calculation module, a video coding and decoding module, a service network management module and other service processing engines. The positioning resolving module is responsible for processing positioning data from the baseband unit, completes position resolving through a positioning algorithm and provides the positioning resolving data for an upper positioning application platform; the video coding and decoding module: the system is responsible for processing video data from a baseband unit, realizes a video real-time monitoring function through a video processing algorithm, and provides the video real-time monitoring function for an upper-layer video monitoring application platform; a service network management module: and the system is responsible for monitoring and centralized control of the working state of each device of the front-end IOT subsystem.

The network system of the embodiment of the application can flexibly overlap services such as indoor positioning and video monitoring on the small station covered by the indoor distribution, improves the cost performance of the solution of the indoor distribution coverage in the vertical industry, can meet the differentiated requirement of the vertical industry by one-time deployment, and is low in deployment investment, flexible and expandable. The transmission link of the indoor substation is fully utilized, the cellular data and the IP data are uniformly transmitted back through the CPRI port, the indoor coverage network infrastructure is multiplexed, and repeated construction is avoided.

As shown in fig. 12, a baseband unit 1200 according to an embodiment of the present invention includes a processor 1210 and a transceiver 1220, wherein,

the processor 1210 is configured to perform framing processing on the cellular data and the IP service data to obtain a common public radio interface CPRI frame; the transceiver 1220 is configured to transmit the CPRI frame to a radio remote unit;

and/or

The transceiver 1220 is configured to receive a CPRI frame transmitted by a radio remote unit, transmit cellular data carried in the CPRI frame to a core network, and transmit IP service data carried in the CPRI frame to a service processing platform;

Optionally, the processor is further configured to:

performing baseband processing on the first cellular data;

Optionally, when the transceiver 1220 receives a CPRI frame transmitted by a radio remote unit, the transceiver is specifically configured to: receiving a second CPRI frame transmitted by the RRU through a CPRI interface;

Optionally, the processor 1210 is specifically configured to: performing de-framing processing on the second CPRI frame to obtain second cellular data and second IP service data;

It should be noted that, the baseband unit provided in the embodiment of the present invention can implement all the method steps implemented in the embodiment of the data transmission method applied to the baseband unit, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the embodiment of the method are omitted here.

A baseband unit according to another embodiment of the present invention, as shown in fig. 13, includes a transceiver 1310, a processor 1300, a memory 1320, and a program or instructions stored in the memory 1320 and executable on the processor 1300; the processor 1300, when executing the program or the instructions, implements the above-described data transmission method applied to the baseband unit.

The transceiver 1310 is used for receiving and transmitting data under the control of the processor 1300.

In fig. 13, among other things, the bus architecture may include any number of interconnected buses and bridges with various circuits being linked together, particularly one or more processors represented by processor 1300 and memory represented by memory 1320. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1310 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1320 may store data used by the processor 1300 in performing operations.

As shown in fig. 14, a remote radio unit 1400 according to an embodiment of the present invention includes a processor 1410 and a transceiver 1420, wherein,

the processor 1410 is configured to: framing the cellular data and the IP service data to obtain a CPRI frame; the transceiver 1420 is configured to: transmitting the CPRI frame to a baseband unit;

and/or

The transceiver 1420 is configured to: receiving a CPRI frame transmitted by a baseband unit, transmitting cellular data carried in the CPRI frame to a terminal, and transmitting IP service data carried in the CPRI frame to an IOT subsystem;

Optionally, the processor 1410 is further configured to:

performing radio frequency processing on the second cellular data;

It should be noted that, the remote radio unit provided in the embodiment of the present invention can implement all the method steps implemented in the embodiment of the data transmission method applied to the remote radio unit, and can achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as those of the embodiment of the method are omitted here.

A remote radio unit according to another embodiment of the present invention, as shown in fig. 15, includes a transceiver 1510, a processor 1500, a memory 1520, and a program or instructions stored in the memory 1520 and executable on the processor 1500; the processor 1500, when executing the program or the instructions, implements the above-mentioned data transmission method applied to the remote radio unit.

The transceiver 1510 is used for receiving and transmitting data under the control of the processor 1500.

In fig. 15, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1500 and various circuits of memory represented by memory 1520 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1510 may be a number of elements including a transmitter and receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 1500 is responsible for managing the bus architecture and general processing, and the memory 1520 may store data used by the processor 1500 in performing operations.

The readable storage medium of the embodiment of the present invention stores a program or an instruction thereon, and the program or the instruction when executed by the processor implements the steps in the data transmission method described above, and can achieve the same technical effects, and the details are not repeated here to avoid repetition.

Wherein, the processor is the processor described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It is further noted that the terminals described in this specification include, but are not limited to, smart phones, tablets, etc., and that many of the functional components described are referred to as modules in order to more particularly emphasize their implementation independence.

In embodiments of the present invention, modules may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be constructed as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module implemented by software may build a corresponding hardware circuit to implement a corresponding function, without considering cost, and the hardware circuit may include a conventional Very Large Scale Integration (VLSI) circuit or a gate array and an existing semiconductor such as a logic chip, a transistor, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

The exemplary embodiments described above are described with reference to the drawings, and many different forms and embodiments of the invention may be made without departing from the spirit and teaching of the invention, therefore, the invention is not to be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of elements may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Unless otherwise indicated, a range of values, when stated, includes the upper and lower limits of the range and any subranges therebetween.

While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the principles of the invention as set forth in the appended claims.

Claims

1. A data transmission method applied to a baseband unit is characterized by comprising the following steps:

framing cellular data and IP service data to obtain a Common Public Radio Interface (CPRI) frame, and transmitting the CPRI frame to a radio remote unit;

and/or

2. The method of claim 1, wherein framing cellular data and IP traffic data to obtain CPRI frames comprises:

wherein, the control timeslot corresponding to the first part of sub-channels in the frame structure of the first CPRI frame carries the first cellular data, and the control timeslot corresponding to the second part of sub-channels in the frame structure of the first CPRI frame carries the first IP service data.

3. The method of claim 2, wherein transmitting the CPRI frame to a remote radio unit comprises:

4. The method of claim 2, further comprising:

performing baseband processing on the first cellular data;

5. The method of claim 1, wherein the receiving the CPRI frames transmitted by the remote radio unit comprises:

receiving a second CPRI frame transmitted by the radio remote unit through a CPRI interface;

6. The method of claim 5, wherein transmitting the cellular data carried in the CPRI frames to a core network and transmitting the IP service data carried in the CPRI frames to a service processing platform, comprises:

7. A data transmission method is applied to a radio remote unit and is characterized by comprising the following steps:

and/or

Receiving a CPRI frame transmitted by a baseband unit, transmitting cellular data carried in the CPRI frame to a terminal, and transmitting IP service data carried in the CPRI frame to an IOT subsystem;

8. The method of claim 7, wherein framing the cellular data and the IP service data to obtain CPRI frames comprises:

9. The method of claim 8, wherein transmitting the CPRI frame to a baseband unit comprises:

10. The method of claim 8, further comprising:

performing radio frequency processing on the second cellular data;

11. The method of claim 7, wherein the receiving the CPRI frame transmitted by the baseband unit comprises:

12. The method of claim 11, wherein transmitting the cellular data carried in the CPRI frame to a terminal and transmitting the IP service data carried in the CPRI frame to an IOT subsystem comprises:

performing de-framing processing on the first CPRI frame to obtain first cellular data and first IP service data;

13. A baseband unit, comprising:

and/or

A second processing module, configured to receive a CPRI frame transmitted by a radio remote unit, transmit cellular data carried in the CPRI frame to a core network, and transmit IP service data carried in the CPRI frame to a service processing platform;

14. The baseband unit of claim 13, wherein the first processing module comprises:

15. The baseband unit of claim 14, wherein the first processing module further comprises:

16. The baseband unit of claim 14, further comprising:

the frame structure processing module is specifically configured to: and framing the first cellular data after baseband processing and the first IP service data according to the channel parameters to obtain the first CPRI frame.

17. The baseband unit of claim 13, wherein said second processing module comprises:

18. The baseband unit of claim 17, wherein the second processing module further comprises:

19. A remote radio unit, comprising:

and/or

20. The remote radio unit according to claim 19, wherein the third processing module comprises:

21. The remote radio unit of claim 20, wherein the third processing module further comprises:

22. The remote radio unit according to claim 20, further comprising:

23. The remote radio unit according to claim 19, wherein the fourth processing module comprises:

a CPRI interface, configured to receive a first CPRI frame transmitted by the baseband unit;

24. The remote radio unit according to claim 23, wherein the fourth processing module comprises:

25. A network system, comprising the baseband unit of any one of claims 13 to 18 and the remote radio unit of any one of claims 19 to 24;

the baseband unit is connected with the service processing platform, and the radio remote unit is connected with the IOT subsystem.

26. A baseband unit, comprising: a transceiver and a processor;

and/or

27. A remote radio unit, comprising: a transceiver and a processor;

the processor is configured to: framing the cellular data and the IP service data to obtain a CPRI frame; the transceiver is configured to: transmitting the CPRI frame to a baseband unit;

and/or

28. A baseband unit, comprising: a transceiver, a processor, a memory, and a program or instructions stored on the memory and executable on the processor; characterized in that the processor, when executing the program or instructions, implements the data transmission method according to any one of claims 1-6.

29. A remote radio unit comprising: a transceiver, a processor, a memory, and a program or instructions stored on the memory and executable on the processor; characterized in that the processor, when executing the program or instructions, implements the data transmission method according to any one of claims 7-12.

30. A readable storage medium on which a program or instructions are stored, which program or instructions, when executed by a processor, carry out the steps in the data transmission method according to any one of claims 1-12.