CN112751576A

Movatterモバイル変換

Info

Publication number: CN112751576A
Application number: CN202011637983.1A
Authority: CN
Inventors: 蓝英财; 徐节涛
Original assignee: Comba Network Systems Co Ltd
Current assignee: Comba Network Systems Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-05-04
Anticipated expiration: 2040-12-31
Also published as: CN112751576B

Abstract

Translated fromChinese

本申请涉及一种DAS系统的扩容方法、装置、DAS系统、通信设备和介质，涉及通信技术领域，该DAS系统的扩容方法应用于DAS系统中的主近端机，DAS系统包括主近端机、至少一个目标通信设备以及至少一个从近端机，主近端机分别与各目标通信设备和各从近端机连接，其中，主近端机在主近端机的信号接收频段上接收第一射频信号，并将第一射频信号转换为第一基带信号；主近端机接收各从近端机发送的第二基带信号，将第一基带信号和各第二基带信号发送至各目标通信设备，由于主近端机和从近端机的信号接收频段不同，因此，主近端机和各从近端机一起可以接收到更多信号频段的射频信号。

The present application relates to a capacity expansion method, device, DAS system, communication equipment and medium of a DAS system, and relates to the field of communication technologies. The capacity expansion method of the DAS system is applied to a main near-end machine in the DAS system, and the DAS system includes a main near-end machine , at least one target communication device and at least one slave near-end machine, the master near-end machine is respectively connected with each target communication device and each slave near-end machine, wherein the master near-end machine receives the first signal on the signal receiving frequency band of the master near-end machine a radio frequency signal, and converts the first radio frequency signal into a first baseband signal; the master near-end unit receives the second baseband signal sent by each slave near-end unit, and sends the first baseband signal and each second baseband signal to each target communication Since the signal receiving frequency bands of the master near-end unit and the slave near-end unit are different, the master near-end unit and each slave near-end unit together can receive radio frequency signals in more signal frequency bands.

Description

DAS (data-based System) expansion method and device, DAS, communication equipment and medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for expanding a capacity of a DAS system, a communication device, and a medium.

Background

The architecture of the current digital Distributed Antenna System (DAS for short) includes: the system comprises a near-end machine, an expansion unit and a far-end machine, wherein the near-end machine can convert received radio frequency signals into optical signals and sends the optical signals to the expansion unit and the far-end machine through optical fibers.

In practical application, in some countries or regions, there are multiple operators, and different signal frequency bands used by different operators result in more signal frequency bands of radio frequency signals, whereas in the existing DAS system, the signal frequency bands that can be received by the near-end device are limited, so the existing DAS system cannot meet the requirements of multiple signal frequency bands.

Disclosure of Invention

In view of the foregoing, it is necessary to provide a method and an apparatus for expanding a DAS system, a communication device, and a medium.

In a first aspect:

a capacity expansion method of a DAS system is applied to a master near-end machine in the DAS system, the DAS system comprises the master near-end machine, at least one target communication device and at least one slave near-end machine, the master near-end machine is respectively connected with each target communication device and each slave near-end machine, and the method comprises the following steps:

receiving a first radio frequency signal on a signal receiving frequency band of a main near-end machine, and converting the first radio frequency signal into a first baseband signal;

receiving second baseband signals sent by the near-end machines, wherein the second baseband signals are obtained by converting second radio-frequency signals from the near-end machines, and the second radio-frequency signals are radio-frequency signals received by the near-end machines on signal receiving frequency bands of the near-end machines;

and sending the first baseband signal and each second baseband signal to each target communication device so that each target communication device can distribute the received first baseband signal and/or second baseband signal to a lower-level communication device of the target communication device.

In one embodiment of the present application, before transmitting the first baseband signal and each second baseband signal to each target communication device, the method further includes:

receiving a connection request sent by target communication equipment, wherein the connection request comprises the equipment type of the target communication equipment, and the equipment type is a remote terminal type or an extended unit type;

and determining a target communication protocol corresponding to the target communication equipment according to the equipment type, and communicating with the target communication equipment based on the target communication protocol.

In one embodiment of the present application, the method further comprises:

sending synchronization information to the target communication device, the synchronization information including rate configuration information and filtering configuration information;

the rate configuration information is used for indicating the target communication equipment and/or the lower-level communication equipment to configure the transmission rate according to the rate configuration information;

the filter configuration information is used for instructing the target communication device and/or the lower-level communication device to configure the filter parameters of the filter according to the filter configuration information.

In an embodiment of the present application, in a case that the target communication device is an extension unit and the lower-level communication device is a remote device, the rate configuration information is used to instruct the extension unit and the remote device to configure a transmission rate according to the rate configuration information, and the filtering configuration information is used to instruct the remote device to configure filtering parameters of a filter according to the filtering configuration information;

and under the condition that the target communication equipment is the remote machine, the rate configuration information is used for indicating the remote machine to configure the transmission rate according to the rate configuration information, and the filtering configuration information is used for indicating the remote machine to configure the filtering parameters of the filter according to the filtering configuration information.

In one embodiment of the present application, the method further comprises:

and determining filtering configuration information according to the signal receiving frequency bands of the master near-end machine and the slave near-end machines.

In one embodiment of the present application, the method further comprises:

acquiring the number of master near-end machines and slave near-end machines included in the DAS;

and determining the rate configuration information according to the number of the master near-end machines and the number of the slave near-end machines.

In one embodiment of the present application, transmitting the first baseband signal and each of the second baseband signals to each of the target communication devices includes:

acquiring frequency band information corresponding to each target communication device, wherein the frequency band information comprises a signal receiving frequency band corresponding to the target communication device;

matching a signal receiving frequency band corresponding to the first baseband signal and a signal receiving frequency band corresponding to the second baseband signal with frequency band information corresponding to each target communication device;

and sending the first baseband signal or the second baseband signal to the matched target communication equipment.

In a second aspect:

a capacity expansion method of a DAS system is applied to a slave near-end machine in the DAS system, the DAS system comprises a master near-end machine, at least one target communication device and at least one slave near-end machine, the master near-end machine is respectively connected with each target communication device and each slave near-end machine, and the method comprises the following steps:

receiving a second radio frequency signal on a signal receiving frequency band of the near-end machine, and converting the second radio frequency signal into a second baseband signal;

and sending the second baseband signal to the main near-end machine so that the main near-end machine sends the second baseband signal to a target communication device corresponding to the second baseband signal in at least one target communication device.

In one embodiment of the present application, each slave near-end device and the master near-end device form a serial communication link, and the slave near-end device transmits the second baseband signal to the master near-end device, including:

the second baseband signal is transmitted to the primary near-end machine over the serial communication link.

In an embodiment of the present application, each slave near-end device forms a direct connection communication link with the master near-end device, and sends the second baseband signal to the master near-end device, including:

and sending the second baseband signal to the main near-end machine through the direct connection communication link.

In a third aspect:

a capacity expansion device of a DAS system is applied to a main near-end machine in the DAS system, the DAS system comprises the main near-end machine, at least one target communication device and at least one slave near-end machine, the main near-end machine is respectively connected with each target communication device and each slave near-end machine, the device comprises:

the first receiving module is used for receiving a first radio frequency signal on a signal receiving frequency band of the main near-end machine and converting the first radio frequency signal into a first baseband signal;

the second receiving module is configured to receive a second baseband signal sent from each of the near-end devices, where the second baseband signal is obtained by converting a second radio frequency signal from the near-end device, and the second radio frequency signal is a radio frequency signal received by the near-end device in a signal receiving frequency band of the near-end device;

and the sending module is used for sending the first baseband signal and each second baseband signal to each target communication device so that each target communication device can distribute the received first baseband signal and/or second baseband signal to the lower-level communication device of the target communication device.

In a fourth aspect:

a capacity expansion device of a DAS system is applied to a slave near-end machine in the DAS system, the DAS system comprises a master near-end machine, at least one target communication device and at least one slave near-end machine, the master near-end machine is respectively connected with each target communication device and each slave near-end machine, and the device comprises:

the receiving module is used for receiving a second radio frequency signal on a signal receiving frequency band of the near-end machine and converting the second radio frequency signal into a second baseband signal;

and the transmitting module is used for transmitting the second baseband signal to the main near-end machine so that the main near-end machine can transmit the second baseband signal to the target communication equipment corresponding to the second baseband signal in the at least one target communication equipment.

In a fifth aspect:

a DAS system comprising a master near-end machine, at least one target communication device, and at least one slave near-end machine, wherein:

the primary near-end machine is configured to execute the steps executed by the primary near-end machine in the method for expanding the capacity of the DAS system according to the first aspect;

the slave near-end device is configured to execute the steps executed by the slave near-end device in the DAS system capacity expansion method according to the second aspect.

A sixth aspect:

a communication device comprising a memory storing a computer program implementing the steps of the method according to the first aspect when the computer program is executed by the processor, and a processor implementing the steps of the method according to the second aspect when the computer program is executed by the processor.

Seventh aspect:

a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of the first aspect or which, when being executed by a processor, carries out the steps of the method of the second aspect.

The method and the device for expanding the capacity of the DAS, the communication equipment and the medium can expand the number of signal frequency bands received by the DAS. The capacity expansion method of the DAS is applied to a master near-end machine in the DAS, the DAS comprises the master near-end machine, at least one target communication device and at least one slave near-end machine, the master near-end machine is respectively connected with each target communication device and each slave near-end machine, and the master near-end machine receives a first radio frequency signal on a signal receiving frequency band of the master near-end machine and converts the first radio frequency signal into a first baseband signal; the master near-end machine receives second baseband signals sent by the slave near-end machines, wherein the second baseband signals are obtained by converting second radio-frequency signals from the near-end machines, and the second radio-frequency signals are radio-frequency signals received by the near-end machines on the signal receiving frequency band of the near-end machines; and sending the first baseband signal and each second baseband signal to each target communication device so that each target communication device can distribute the received first baseband signal and/or second baseband signal to a lower-level communication device of the target communication device. In the embodiment of the application, under the condition that the signal receiving frequency bands of the master near-end machine and the slave near-end machines are different, the master near-end machine and each slave near-end machine can receive radio frequency signals of more signal frequency bands together, so that the number of the signal frequency bands which can be received in the DAS system is increased.

Drawings

FIG. 1 is a schematic illustration of an implementation environment in which embodiments of the present application are related;

FIG. 2 is a schematic diagram of another exemplary environment in which embodiments of the present application are described;

FIG. 3 is a schematic diagram of another exemplary environment in which embodiments of the present application are described;

FIG. 4 is a schematic diagram of another exemplary environment in which embodiments of the present application are described;

FIG. 5 is a schematic diagram of another exemplary environment in which embodiments of the present application are described;

fig. 6 is a flowchart of a method for expanding a DAS system according to an embodiment of the present disclosure;

fig. 7 is a flowchart of another DAS system capacity expansion method according to an embodiment of the present disclosure;

fig. 8 is a block diagram of an FPGA module of a main near-end device according to an embodiment of the present application;

fig. 9 is a flowchart of a method for determining rate configuration information by a master near-end device according to an embodiment of the present application;

fig. 10 is a flowchart of a method for a master near-end device to transmit a first baseband signal and each second baseband signal to each target communication device according to an embodiment of the present application;

fig. 11 is a flowchart of another DAS system capacity expansion method according to an embodiment of the present application;

fig. 12 is a block diagram of a capacity expansion device of a DAS system according to an embodiment of the present disclosure;

fig. 13 is a block diagram of a capacity expansion device of a DAS system according to an embodiment of the present disclosure;

fig. 14 is a block diagram of a DAS system according to an embodiment of the present application;

fig. 15 is a block diagram of a communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The architecture of the current digital Distributed Antenna System (DAS for short) includes: the system comprises a near-end machine, an expansion unit and a far-end machine, wherein the near-end machine can convert received radio frequency signals into optical signals, sends the optical signals to the expansion unit through optical fibers, and forwards the optical signals to the far-end machine through the expansion unit.

In practical applications, in some countries or regions, there may be multiple operators, and different operators use different signal frequency bands, resulting in more signal frequency bands of radio frequency signals. In the existing DAS system, the frequency band of signals that can be received by the near-end device is limited, and therefore, the existing DAS system cannot meet the requirement of multiple frequency bands.

The prior art proposes a method for receiving radio frequency signals of different signal frequency bands by arranging a plurality of sets of DAS systems, however, this method increases the cost and causes redundancy of the extension unit and the remote terminal.

Based on the foregoing technical problem, an embodiment of the present application provides a method for expanding a DAS system, where the method is applied to a master near-end machine in the DAS system, the DAS system includes the master near-end machine, at least one target communication device, and at least one slave near-end machine, and the master near-end machine is connected to each target communication device and each slave near-end machine, respectively, where the master near-end machine may receive a first radio frequency signal and acquire the first baseband signal, and may receive a second baseband signal sent by each slave near-end machine, and then sends the first baseband signal and the second baseband signal to each target communication device, so that each target communication device distributes the received first baseband signal and/or the received second baseband signal to a lower communication device of the target communication device. In the embodiment of the application, under the condition that the signal receiving frequency bands of the master near-end machine and the slave near-end machines are different, the master near-end machine and each slave near-end machine can receive radio frequency signals of more signal frequency bands together, so that the number of the signal frequency bands which can be received in the DAS system is increased.

Next, a brief description will be given of an implementation environment related to the method for expanding the capacity of the DAS system according to the embodiment of the present application.

Referring to fig. 1, fig. 1 is a schematic diagram of an implementation environment related to a method for expanding a capacity of a DAS system according to an embodiment of the present application, where as shown in fig. 1, the implementation environment includes a DAS system, the DAS system includes a master near-end machine, at least one target communication device, and at least one slave near-end machine, and the master near-end machine is connected to each target communication device and each slave near-end machine, respectively.

Optionally, in this embodiment of the application, the signal receiving frequency bands of the slave near-end unit and the master near-end unit may be the same or different.

Optionally, the near-end machine includes: the system comprises a downlink radio frequency link, an analog-digital/digital-analog conversion chip, an uplink radio frequency link, an FPGA (Field Programmable Gate Array) module, an MCU (micro controller Unit) and an optical fiber transmission circuit. The analog-digital/digital-analog conversion chip is respectively connected with the downlink radio frequency link, the uplink radio frequency link and the FPGA module, the FPGA module is connected with the MCU through an Ethernet interface, and meanwhile, the FPGA module is connected with the optical fiber transmission link.

The extension unit includes: the system comprises an optical fiber transmission link, an FPGA module and an MCU. The FPGA module is respectively connected with the optical fiber transmission link and the MCU.

The remote machine includes: the system comprises a downlink radio frequency link, an analog-digital/digital-analog conversion chip, an uplink radio frequency link, an FPGA module, an MCU and an optical fiber transmission circuit. The analog-digital/digital-analog conversion chip is respectively connected with the downlink radio frequency link, the uplink radio frequency link and the FPGA module, the FPGA module is connected with the MCU through an Ethernet interface, and meanwhile, the FPGA module is connected with the optical fiber transmission link.

Optionally, in this embodiment of the present application, signal transmission among the near-end unit, the expansion unit, and the far-end unit uses 1 or 2 optical fiber transmission. And the optical fiber transmission interface adopts a reconfigurable design. The speed range of the optical fiber transmission interface is 3.072 Gbps-25.3302 Gbps.

Optionally, in an embodiment of the present application, as shown in fig. 2, at least one slave near-end device and the master near-end device form a serial communication link, and each slave near-end device may transmit the second baseband signal upwards stage by stage based on the serial communication link until transmitting to the master near-end device.

Optionally, in an embodiment of the present application, as shown in fig. 3, at least one slave near-end device may respectively form a direct connection communication link with the master near-end device, and each slave near-end device may directly transmit the second baseband signal to the master near-end device based on the direct connection communication link.

Alternatively, in an embodiment of the present application, as shown in fig. 4, the target communication device may be an extension unit, and the lower-level communication device of the extension unit is a remote machine.

Optionally, in an embodiment of the present application, as shown in fig. 5, the target communication device is a remote machine.

Referring to fig. 6, which shows a flowchart of a method for expanding a DAS system according to an embodiment of the present application, as shown in fig. 6, the method for expanding the DAS system is applied to a master near-end machine in the DAS system, where the DAS system includes the master near-end machine, at least one target communication device, and at least one slave near-end machine, and the master near-end machine is connected to each target communication device and each slave near-end machine, respectively, and the method for expanding the DAS system may include the following steps:

step 601, the main near-end machine receives a first radio frequency signal in a signal receiving frequency band of the main near-end machine, and converts the first radio frequency signal into a first baseband signal.

In the embodiment of the present application, the signal receiving frequency band of the radio frequency signal that can be received by the main near-end unit is limited, wherein the radio frequency signal that is received by the main near-end unit based on the limited signal receiving frequency band is referred to as a first radio frequency signal. Optionally, the main near-end unit may receive radio frequency signals in three to four signal reception frequency bands.

Optionally, the signal format of the first Radio frequency signal that the master near-end device can receive is preset, and may be, for example, a 5G TDD-NR (Time Division duplex-New Radio, abbreviated as TDD-NR) signal, a 4G TDD-LTE (Time Division duplex-Long Term Evolution, abbreviated as TDD-LTE) signal, or a GSM (Global System for Mobile Communications, chinese) signal.

Optionally, the bandwidth of the radio frequency signal that can be received by the main near-end unit is preset.

In the embodiment of the application, the main near-end machine may receive a first radio frequency signal of a preset signal system in a preset signal receiving frequency band of the main near-end machine through a downlink radio frequency link with a preset bandwidth, then, an analog-to-digital conversion chip of the main near-end machine may convert the first radio frequency signal into a digital signal, and perform digital processing on the digital signal based on an FPGA module of the main near-end machine, where the digital processing includes Gain adjustment, up-down frequency conversion, forming filtering, ALC (Automatic Gain Control, chinese), compression, and the like, and after the digital processing, the first baseband signal may be obtained.

Instep 602, the master near-end unit receives the second baseband signals transmitted by the respective slave near-end units.

The second baseband signal is obtained by converting a second radio frequency signal from the near-end unit, and the second radio frequency signal is a radio frequency signal received from the near-end unit in a signal receiving frequency band of the near-end unit.

In the embodiment of the present application, the signal reception frequency band of the radio frequency signal that can be received from the near-end unit is also limited, and optionally, radio frequency signals of three to four signal reception frequency bands can be received from the near-end unit.

In this embodiment of the application, the signal receiving frequency bands of the slave near-end unit and the master near-end unit are different, and are optional: the signal receiving frequency band of the slave near-end unit may be completely different from or partially different from the signal receiving frequency band of the master near-end unit.

Optionally, in this embodiment of the application, the radio frequency signal received by the slave near-end device in the signal receiving frequency band thereof is referred to as a second radio frequency signal, and optionally, a signal system of the second radio frequency signal received by the slave near-end device may be different from a signal system of the first radio frequency signal received by the master near-end device.

In the embodiment of the application, the slave near-end unit may receive, in a preset signal receiving frequency band of the slave near-end unit, a second radio frequency signal of a preset signal system in a preset bandwidth based on the downlink radio frequency link, and then, the analog-to-digital conversion chip of the slave near-end unit may convert the second radio frequency signal into a digital signal, and perform digital processing on the digital signal based on the FPGA module of the slave near-end unit, where the digital processing includes gain adjustment, up-down conversion, forming filtering, ALC, compression, and the like, and after the digital processing, the second baseband signal may be obtained. The slave near-end unit may then transmit the second baseband signal to the master near-end unit.

Optionally, in this embodiment of the application, each slave near-end device may send the second baseband signal to the master near-end device based on the direct connection communication link.

Optionally, in this embodiment of the application, each slave near-end device may transmit the second baseband signal of each slave near-end device to the master near-end device step by step based on the serial communication link.

Step 603, the master near-end machine sends the first baseband signal and each second baseband signal to each target communication device, so that each target communication device distributes the received first baseband signal and/or second baseband signal to a lower-level communication device of the target communication device.

In this embodiment of the application, after the master near-end device receives the second baseband signal sent by each slave near-end device, the master near-end device may distribute the first baseband signal and the second baseband signal to each target communication device.

Optionally, in this embodiment of the application, the main near-end machine may determine the target communication device corresponding to the first baseband signal and/or the second baseband signal according to a signal frequency band of the first baseband signal and a signal frequency band of the second baseband signal. Optionally, the signal frequency band corresponding to the first baseband signal is a signal receiving frequency band corresponding to the first radio frequency signal, and the signal frequency band corresponding to the second baseband signal is a signal receiving frequency band corresponding to the second radio frequency signal.

The target communication device may, after receiving the first baseband signal and/or the second baseband signal, distribute the received first baseband signal and/or second baseband signal to a lower level communication device of the target communication device.

Optionally, in this embodiment of the application, if the target communication device is an extension unit, the lower-level communication device is a remote terminal. And if the target communication equipment is a remote terminal, the lower-level communication equipment is terminal equipment.

In the capacity expansion method for the DAS system provided in the embodiment of the present application, the near-end device may implement master-slave configuration, and respectively access signals of different systems, for example: the master near-end machine is accessed to the 5G TDD-NR signal, the slave near-end machine can be accessed to the 4G TDD-LTE signals of a plurality of frequency bands, free combination of signals of a plurality of systems can be realized, the application range of the system is expanded, and the universality of the system is improved.

Referring to fig. 7, fig. 7 is a flowchart illustrating another method for expanding a DAS system according to an embodiment of the present application, where the method for expanding the DAS system includes the following steps:

instep 701, the master near-end machine receives a connection request sent by the target communication device.

In this embodiment of the application, a main near-end device and a target communication device are connected through an optical fiber, and then before communication is performed between the main near-end device and the target communication device, the target communication device may send a connection request to the main near-end device based on the optical fiber, where the connection request includes a device type of the target communication device, and the device type is a far-end device type or an extended unit type.

After the master near-end machine receives the connection request, the device type of the target communication device sending the connection request can be identified.

And step 702, the main near-end machine determines a target communication protocol corresponding to the target communication equipment according to the equipment type, and communicates with the target communication equipment based on the target communication protocol.

In the embodiment of the application, a plurality of different protocol configuration files are preset in the main near-end machine, the different protocol configuration files correspond to different communication protocols, and the different communication protocols can be used for communicating with target communication devices of different device types.

In this embodiment of the application, the master near-end machine may determine, from a plurality of preset protocol configuration files, a target communication protocol corresponding to the target communication device according to the device type of the target communication device that sends the connection request, and communicate with the target communication device based on the target communication protocol.

Optionally, in this embodiment of the application, under the condition that the application scene scale is small and the types of signal systems are few, as shown in fig. 5, single optical fiber transmission may be adopted between the main near-end device and the target communication device, and the target communication device may be a far-end device.

Optionally, in this embodiment of the application, in the case of a moderate application scene scale, as shown in fig. 4, dual optical fiber transmission may be adopted between the main near-end device and the target communication device, and the target communication device is an extension unit, and a lower-level communication device of the extension unit is a far-end device.

In the embodiment of the application, in the capacity expansion method of the DAS system, the main near-end machine adopts a design method that the interface of the expansion unit is compatible with that of the remote machine, so that in the DAS system, the main near-end machine can be directly connected with the remote machine and can also be connected with the remote machine through the expansion unit, thereby realizing higher networking freedom and coping with various different use scenes.

On the basis of the above embodiment, after the target communication protocol between the master near-end machine and the target communication device is determined, the master near-end machine may transmit the synchronization information to the target communication device before the communication between the master near-end machine and the target communication device is performed.

Optionally, the synchronization information includes rate configuration information and filtering configuration information.

In the embodiment of the present application, as shown in fig. 8, fig. 8 is a schematic diagram illustrating rate configuration and filter configuration performed by an FPGA module of a main near-end machine. Before the main near-end machine communicates with the target communication equipment, the main near-end machine can configure the transmission rate of a downlink communication link of the main near-end machine and the filtering parameters of filters of all signal transmission channels, and on the basis, rate configuration information and filtering configuration information are generated and are sent to the target communication equipment as synchronous information. And the synchronization information is used for indicating the target communication equipment to carry out parameter synchronization with the main near-end machine. Therefore, the downlink communication link established between the main near-end machine and the target communication equipment and the subordinate communication equipment thereof can keep the same signal transmission rate.

In the following, the process of the master near-end machine determining the filtering configuration information is described: and the master near-end machine determines filtering configuration information according to the signal receiving frequency bands of the master near-end machine and the slave near-end machines.

In the embodiment of the application, the main near-end machine can determine a plurality of signal transmission channels according to the signal receiving frequency band of the main near-end machine and the signal receiving frequency band of each slave near-end machine, and different signal transmission channels can be used for transmitting signals of different signal frequency bands. Optionally, in this embodiment of the present application, a signal receiving frequency band of the master near-end device and a signal receiving frequency band of each slave near-end device may be used as the filtering configuration information.

Different signal transmission channels can transmit signals with different signal transmission bandwidths, and the signal transmission pressure can be relieved by arranging a plurality of signal transmission channels. Optionally, in this embodiment of the present application, the filtering configuration information may include bandwidth information of the signal transmission channel, a signal receiving frequency band of the master near-end device, and a signal receiving frequency band of each slave near-end device.

In the following, the process of the master near-end determining the rate configuration information, as shown in fig. 9, in the embodiment of the present application is described:

step 901, the master near-end machine acquires the number of the master near-end machines and the number of the slave near-end machines included in the DAS system.

And step 902, the master near-end machine determines the rate configuration information according to the number of the master near-end machines and the slave near-end machines.

In the embodiment of the application, when the DAS system includes multiple stages of near-end devices, signals to be transmitted are increased, and therefore the basic transmission rate cannot meet the transmission requirements of the multiple stages of near-end devices. In this embodiment, the master near-end device may determine a rate coefficient of the basic transmission rate according to the number of the master near-end devices and the slave near-end devices, and determine the rate coefficient as the rate configuration information.

Optionally, in this embodiment of the present application, the rate configuration information is used to instruct the target communication device and/or the lower level communication device to configure the transmission rate according to the rate configuration information; the filter configuration information is used for instructing the target communication device and/or the lower-level communication device to configure the filter parameters of the filter according to the filter configuration information.

Optionally, in this embodiment of the application, when the target communication device is an extension unit and the lower-level communication device is a far-end machine, the rate configuration information is used to instruct the extension unit and the far-end machine to configure the transmission rate according to the rate configuration information, and the filtering configuration information is used to instruct the far-end machine to configure the filtering parameters of the filter according to the filtering configuration information.

After receiving the synchronization information, the extension unit may match a transmission rate of a transceiving link of the extension unit according to the rate configuration information, where the transceiving link refers to a receiving link with the main near-end device and a transmitting link with the far-end device. The expansion unit may further forward the synchronization information to the remote terminal, and after receiving the synchronization information, the remote terminal may match a transmission rate of a downlink communication link between the remote terminal and the expansion unit according to the rate configuration information, and may configure a filter parameter of a filter of the signal transmission channel according to the filter configuration parameter.

Optionally, in this embodiment of the application, in a case that the target communication device is a remote terminal, the rate configuration information is used to instruct the remote terminal to configure the transmission rate according to the rate configuration information, and the filtering configuration information is used to instruct the remote terminal to configure the filtering parameter of the filter according to the filtering configuration information.

After receiving the synchronization information, the remote terminal may match the transmission rate of the downlink communication link between the remote terminal and the extension unit according to the rate configuration information, and may configure the filter parameter of the filter of the signal transmission channel according to the filter configuration parameter.

In the DAS capacity expansion method provided by the application, the signal transmission rate, the filter and the like between the master near-end machine and the slave near-end machine, the expansion unit and the far-end machine can be dynamically reconfigured according to requirements, the signal transmission rate is changed, and the received signals are filtered, so that the power consumption of the system can be reduced, the transmission efficiency of the whole DAS system can be improved, and the bandwidth of the system is increased.

Referring to fig. 10, a technical process of the primary near-end device sending the first baseband signal and each second baseband signal to each target communication device in the present application is described below, and as shown in fig. 10, the capacity expansion method of the DAS system may include the following steps:

step 1001, the master near-end machine acquires frequency band information corresponding to each target communication device.

The frequency band information includes a signal receiving frequency band corresponding to the target communication device.

In this embodiment of the present application, when each target communication device establishes a communication connection with the master near-end device, the master near-end device may report its corresponding frequency band information to the master near-end device, and the master near-end device may store the respective corresponding frequency band information reported by each target communication device.

Instep 1002, the master near-end unit matches a signal receiving frequency band corresponding to the first baseband signal and a signal receiving frequency band corresponding to the second baseband signal with frequency band information corresponding to each target communication device.

In this embodiment, the master near-end device may match the signal receiving frequency bands of the first baseband signal and the second baseband signal with frequency band information corresponding to each target communication device one by one, respectively.

That is, for the first baseband signal and the second baseband signal, the master near-end unit may search for a target communication device that is the same as the signal reception frequency band of the first baseband signal, and search for a target communication device that is the same as the signal reception frequency band of the second baseband signal, from among the target communication devices.

And step 1003, the master near-end machine sends the first baseband signal or the second baseband signal to the matched target communication equipment.

The master near-end machine may transmit the first baseband signal to a target communication device having the same signal reception frequency band as the first baseband signal, and may transmit the second baseband signal to the target communication device having the same signal reception frequency band as the second baseband signal.

Referring to fig. 11, which shows a flowchart of a method for expanding a volume of a DAS system according to an embodiment of the present application, as shown in fig. 11, the method is applied to a slave near-end machine in the DAS system, where the DAS system includes a master near-end machine, at least one target communication device, and at least one slave near-end machine, the master near-end machine is connected to each target communication device and each slave near-end machine, respectively, and the method for expanding a volume of the DAS system may include the following steps:

step 1101, receiving a second radio frequency signal from the near-end unit in the signal receiving frequency band of the near-end unit, and converting the second radio frequency signal into a second baseband signal.

In this embodiment of the present application, a radio frequency signal received by the slave near-end device in its signal receiving frequency band is referred to as a second radio frequency signal, and optionally, a signal system of the second radio frequency signal received by the slave near-end device may be different from a signal system of the first radio frequency signal received by the master near-end device.

Alternatively, the signal reception frequency band of the radio frequency signal receivable from the near-end unit is limited, and alternatively, radio frequency signals of three to four signal reception frequency bands may be received from the near-end unit.

Wherein, the signal reception frequency range of the slave near-end machine is different from that of the master near-end machine, and is selectable: the signal receiving frequency band of the slave near-end unit may be completely different from or partially different from the signal receiving frequency band of the master near-end unit.

In this embodiment of the application, the slave near-end device may receive a second radio frequency signal of a preset signal system in a preset bandwidth in a preset signal receiving frequency band of the slave near-end device based on a downlink radio frequency link, and then, an analog-to-digital conversion chip of the slave near-end device may convert the second radio frequency signal into a digital signal, and perform digital processing on the digital signal based on an FPGA module of the slave near-end device, where the digital processing includes Gain adjustment, up-down frequency conversion, forming filtering, ALC (Automatic Gain Control, chinese), compression, and the like, and after the digital processing, a second baseband signal may be obtained. The slave near-end unit may then transmit the second baseband signal to the master near-end unit.

Step 1102, the slave near-end machine sends the second baseband signal to the master near-end machine, so that the master near-end machine sends the second baseband signal to a target communication device corresponding to the second baseband signal in at least one target communication device.

In the embodiment of the present application, the implementation manner of sending the second baseband signal to the master near-end machine from the near-end machine includes the following two manners:

the first mode is as follows: as shown in fig. 2, each slave near-end device and the master near-end device form a serial communication link, in this case, the slave near-end device transmits the second baseband signal to the master near-end device based on the serial communication link, that is, the slave near-end device may upload the second baseband signal to the upper-stage slave near-end device or the master near-end device based on the serial communication link, and then the upper-stage slave near-end device uploads the second baseband signal to the upper-stage slave near-end device or the master near-end device based on the serial communication link, and the second baseband signal of each slave near-end device is transmitted to the master near-end device in a step-by-step uploading manner.

The second way is: as shown in fig. 3, each slave near-end device and the master near-end device form a direct connection communication link, and each slave near-end device can directly transmit a second baseband signal to the master near-end device.

In the embodiment of the application, the slave near-end machine can receive the second radio frequency signal, convert the second radio frequency signal into the second baseband signal, and send the second baseband signal to the master near-end machine, so that the master near-end machine and each slave near-end machine can receive radio frequency signals of more signal frequency bands together, and the number of the signal frequency bands which can be received in the DAS system is increased.

It should be understood that, although the respective steps in the flowcharts of fig. 6 to 11 are sequentially shown as indicated by arrows, the steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Also, at least some of the steps in fig. 6 to 11 may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the other steps or stages.

In one embodiment, as shown in fig. 12, there is provided acapacity expansion apparatus 1200 of a DAS system, where thecapacity expansion apparatus 1200 of the DAS system is applied to a master near-end machine in the DAS system, the DAS system includes the master near-end machine, at least one target communication device, and at least one slave near-end machine, the master near-end machine is connected to each target communication device and each slave near-end machine, respectively, and thecapacity expansion apparatus 1200 of the DAS system includes: afirst receiving module 1201, afirst receiving module 1202 and asending module 1203, wherein:

afirst receiving module 1201, configured to receive a first radio frequency signal in a signal receiving frequency band of a main near-end unit, and convert the first radio frequency signal into a first baseband signal;

asecond receiving module 1202, configured to receive a second baseband signal sent from each of the near-end devices, where the second baseband signal is obtained by converting a second radio frequency signal from the near-end device, and the second radio frequency signal is a radio frequency signal received by the near-end device in a signal receiving frequency band of the near-end device;

asending module 1203, configured to send the first baseband signal and each second baseband signal to each target communication device, so that each target communication device distributes the received first baseband signal and/or second baseband signal to a lower-level communication device of the target communication device.

In an embodiment of the present application, thefirst receiving module 1201 is further configured to:

under the condition that the target communication equipment is an extension unit and the lower-level communication equipment is a far-end machine, the rate configuration information is used for indicating the extension unit and the far-end machine to configure the transmission rate according to the rate configuration information, and the filtering configuration information is used for indicating the far-end machine to configure the filtering parameters of the filter according to the filtering configuration information;

In an embodiment of the present application, the sendingmodule 1203 is further configured to:

For specific limitations of the DAS system capacity expansion device, reference may be made to the above limitations on the DAS system capacity expansion method, which are not described herein again. All or part of each module in the capacity expansion device of the DAS system may be implemented by software, hardware, or a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the communication device, and can also be stored in a memory in the communication device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, as shown in fig. 13, there is provided avolume expansion apparatus 1300 of a DAS system, where thevolume expansion apparatus 1300 of the DAS system is applied to a slave near-end machine in the DAS system, the DAS system includes a master near-end machine, at least one target communication device, and at least one slave near-end machine, the master near-end machine is connected to each target communication device and each slave near-end machine, respectively, and signal receiving frequency bands of each slave near-end machine and the master near-end machine are different, and thevolume expansion apparatus 1300 of the DAS system includes: a receivingmodule 1301 and asending module 1302, wherein:

areceiving module 1301, configured to receive a second radio frequency signal in a signal receiving frequency band from a near-end device, and convert the second radio frequency signal into a second baseband signal;

the sendingmodule 1302 is configured to send the second baseband signal to the master near-end device, so that the master near-end device sends the second baseband signal to a target communication device corresponding to the second baseband signal in the at least one target communication device.

In one embodiment of the present application, each slave near-end device and the master near-end device form a serial communication link, and the sendingmodule 1302 is further configured to:

In an embodiment of the present application, each slave near-end device respectively forms a direct communication link with the master near-end device, and the sendingmodule 1302 is further configured to:

As shown in fig. 14, in one embodiment of the present application, aDAS system 1400 is provided, theDAS system 1400 comprising a master near-end 1401, at least onetarget communication device 1402, and at least one slave near-end 1403, wherein,

the master near-end unit 1401 is configured to perform the steps performed by the master near-end unit in the foregoing method embodiments.

The slave near-end machine 1403 is used for executing the steps executed by the slave near-end machine in the above-described method embodiment.

In one embodiment of the present application, a communication device is provided, and an internal structure diagram of the communication device may be as shown in fig. 15. The communication device includes a receiver, a transmitter, a processor, and a memory connected by a system bus. The receiver is used for receiving radio frequency signals and baseband signals sent by external equipment. The transmitter is used for transmitting a baseband signal to an external device. The processor is used to provide computing and control capabilities. The memory comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The computer program is executed by a processor to implement a method of capacity expansion for a DAS system.

Those skilled in the art will appreciate that the architecture shown in fig. 15 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, a communication device is provided comprising a memory storing a computer program and a processor implementing the following steps when executing the computer program:

In one embodiment of the application, the processor when executing the computer program realizes the following steps:

The implementation principle and technical effect of the base station provided in the embodiment of the present application are similar to those of the method embodiment described above, and are not described herein again.

In one embodiment of the application, each slave near-end unit and the master near-end unit form a serial communication link, and the processor, when executing the computer program, implements the following steps:

In one embodiment of the present application, each slave near-end device forms a direct communication link with the master near-end device, and the processor implements the following steps when executing the computer program:

In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:

In one embodiment of the application, the computer program when executed by the processor performs the steps of:

The implementation principle and technical effect of the computer-readable storage medium provided by this embodiment are similar to those of the above-described method embodiment, and are not described herein again.

In one embodiment of the application, each slave near-end unit forms a serial communication link with the master near-end unit, and the computer program when executed by the processor performs the steps of:

In one embodiment of the application, each slave near-end machine forms a direct communication link with the master near-end machine, and the computer program realizes the following steps when being executed by the processor:

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An expansion method of a DAS system, applied to a master near-end device in the DAS system, wherein the DAS system includes the master near-end device, at least one target communication device, and at least one slave near-end device, and the master near-end device is connected to each target communication device and each slave near-end device, respectively, the method includes:

receiving a first radio frequency signal on a signal receiving frequency band of the main near-end machine, and converting the first radio frequency signal into a first baseband signal;

receiving second baseband signals sent by the slave near-end machines, wherein the second baseband signals are obtained by converting second radio-frequency signals from the slave near-end machines, and the second radio-frequency signals are radio-frequency signals received by the slave near-end machines on the signal receiving frequency band of the slave near-end machines;

and sending the first baseband signal and each second baseband signal to each target communication device, so that each target communication device distributes the received first baseband signal and/or second baseband signal to a lower-level communication device of the target communication device.

2. The method of expanding the DAS system of claim 1, wherein before the sending the first baseband signal and each of the second baseband signals to each of the target communication devices, the method further comprises:

receiving a connection request sent by the target communication equipment, wherein the connection request comprises an equipment type of the target communication equipment, and the equipment type is a remote terminal type or an extended unit type;

3. The method of expanding a DAS system of claim 1, further comprising:

wherein the rate configuration information is used for instructing the target communication device and/or the subordinate communication device to configure the transmission rate according to the rate configuration information;

the filtering configuration information is used for instructing the target communication device and/or the lower level communication device to configure the filtering parameters of the filter according to the filtering configuration information.

4. The method for expanding the capacity of the DAS system according to claim 3, wherein in a case where the target communication device is an extension unit and the lower-level communication device is a remote device, the rate configuration information is used to instruct the extension unit and the remote device to configure a transmission rate according to the rate configuration information, and the filter configuration information is used to instruct the remote device to configure filter parameters of a filter according to the filter configuration information;

and in the case that the target communication device is a remote terminal, the rate configuration information is used for instructing the remote terminal to configure the transmission rate according to the rate configuration information, and the filtering configuration information is used for instructing the remote terminal to configure the filtering parameters of the filter according to the filtering configuration information.

5. A method of expanding a DAS system according to claim 3 or 4, the method further comprising:

and determining the filtering configuration information according to the signal receiving frequency bands of the master near-end machine and the slave near-end machines.

6. A method of expanding a DAS system according to claim 3 or 4, the method further comprising:

acquiring the number of the master near-end machines and the number of each slave near-end machine included in the DAS system;

and determining the rate configuration information according to the number of the master near-end machines and the slave near-end machines.

7. The method of expanding the DAS system of claim 1, wherein the sending the first baseband signal and each of the second baseband signals to each of the target communication devices comprises:

matching the signal receiving frequency band corresponding to the first baseband signal and the signal receiving frequency band corresponding to the second baseband signal with frequency band information corresponding to each target communication device;

and sending the first baseband signal or the second baseband signal to a matched target communication device.

8. An expansion method of a DAS system, applied to a slave near-end machine in the DAS system, wherein the DAS system includes a master near-end machine, at least one target communication device, and at least one slave near-end machine, and the master near-end machine is connected to each target communication device and each slave near-end machine, respectively, the method includes:

receiving a second radio frequency signal on the signal receiving frequency band of the slave near-end machine, and converting the second radio frequency signal into a second baseband signal;

and sending the second baseband signal to the main near-end machine, so that the main near-end machine sends the second baseband signal to at least one target communication device corresponding to the second baseband signal.

9. The method of expanding the DAS system of claim 8, wherein each slave near-end device and the master near-end device form a serial communication link, and the sending the second baseband signal to the master near-end device includes:

and transmitting the second baseband signal to the main near-end machine through the serial communication link.

10. The DAS system capacity expansion method of claim 8, wherein each slave near-end device forms a direct communication link with the master near-end device, and the sending the second baseband signal to the master near-end device includes:

and sending the second baseband signal to the main near-end machine through the direct communication link.

11. An expansion device of a DAS system, applied to a master near-end device in the DAS system, wherein the DAS system includes the master near-end device, at least one target communication device, and at least one slave near-end device, the master near-end device is connected to each target communication device and each slave near-end device, and signal receiving frequency bands of each slave near-end device and the master near-end device are different, the expansion device comprising:

a second receiving module, configured to receive a second baseband signal sent by each slave near-end device, where the second baseband signal is obtained by converting a second radio frequency signal by the slave near-end device, and the second radio frequency signal is a radio frequency signal received by the slave near-end device in a signal receiving frequency band of the slave near-end device;

a sending module, configured to send the first baseband signal and each of the second baseband signals to each of the target communication devices, so that each of the target communication devices distributes the received first baseband signal and/or the received second baseband signal to a lower-level communication device of the target communication device.

12. An expansion device of a DAS system, applied to a slave near-end device in the DAS system, wherein the DAS system includes a master near-end device, at least one target communication device, and at least one slave near-end device, the master near-end device is connected to each target communication device and each slave near-end device, and signal receiving frequency bands of each slave near-end device and the master near-end device are different, the device comprising:

a receiving module, configured to receive a second radio frequency signal in the signal receiving frequency band of the slave near-end unit, and convert the second radio frequency signal into a second baseband signal;

and the sending module is used for sending the second baseband signal to the main near-end machine so that the main near-end machine can send the second baseband signal to at least one target communication device corresponding to the second baseband signal in the target communication device.

13. A DAS system comprising a master near-end, at least one target communication device, and at least one slave near-end, wherein:

the primary near-end machine is configured to perform the steps performed by the primary near-end machine in the capacity expansion method for the DAS system according to any one of claims 1 to 7;

the slave near-end machine for performing the steps performed by the slave near-end machine in the capacity expansion method of the DAS system according to any one of claims 8 to 10.

14. A communication device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any one of claims 1 to 7 when executing the computer program or implements the steps of the method of any one of claims 8 to 10 when executing the computer program.

15. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of one of claims 1 to 7 or which, when being executed by a processor, carries out the steps of the method of one of claims 8 to 10.