CN118317319A - Dual-channel variable-frequency micro-distribution uplink service processing method and system - Google Patents

Abstract

The invention relates to a double-channel variable frequency micro-distribution uplink service processing method and a system, wherein the double-channel variable frequency micro-distribution system is of a four-stage architecture and comprises a near-end unit, an access unit, an extension unit and a far-end unit, wherein the near-end unit is connected with a host RRU to process NR signals and variable frequency signals through double channels, the access unit, the extension unit and the far-end unit can be accessed to any coupling node in a DAS system, the far-end unit is deployed in a downlink coverage edge area, the uplink capacity of the edge coverage area of the DAS system can be greatly improved, the uplink service experience of a user is improved, a feeder line can be utilized to take electricity without a power supply, the construction is convenient, and the application scene is rich; the remote unit can also dynamically adjust the uplink gain, so that the transmitting power of the uplink signal and the uplink frequency-shift signal can be ensured, and meanwhile, the power consumption of the whole system is low, and the electric energy can be saved.

Description

Dual-channel variable-frequency micro-distribution uplink service processing method and system

[ Field of technology ]

The invention relates to the technical field of wireless coverage of mobile communication base stations, in particular to a dual-channel frequency conversion micro-distribution uplink service processing method and system.

[ Background Art ]

Mobile communication systems are evolving very rapidly from the traditional voice service-dominant 2G to the current data service-dominant 5G and upcoming 6G systems. The communication needs of people are no longer limited to being able to communicate but a better business experience is desired. However, the base station and the terminal, which are two nodes for communication, transmit and receive signals, consume a large amount of power. Bandwidth and power requirements are major rate limiting bottlenecks, and therefore, the bandwidth of communication systems is also becoming wider and the frequency band is also becoming higher. The contradiction between the downlink coverage area and the transmitting power of the base station is more prominent due to the requirements of wide frequency band and high speed. The base station may generally solve the problem of energy demand by a power supply system, but the uplink communication wireless signal from the handset to the base station requires a battery of the terminal to provide the transmission power. The volume, weight, charging time and other factors of the mobile phone influence the perception of the user. The power consumption of the user terminal is reduced, and meanwhile, the contradiction of uplink service perception is improved all the time.

How to solve these contradictions, there are many ways to reduce the number of uplink channels, reduce the uplink operation bandwidth, etc. These costs are more than what compromises the uplink service experience of the user terminal. According to the link budget of a traditional DAS (Distributed ANTENNA SYSTEM) system, the terminal uplink service can realize a theoretical peak in the near-point area of the ceiling antenna. As the ue moves away from the ceiling antenna, the downlink received field strength RSRP (REFERENCE SIGNAL RECEIVING Power, reference signal received Power) continues to decrease, and the uplink service experience becomes worse rapidly when reaching the coverage edge due to increased link loss.

Therefore, a DAS system and method for improving the uplink service experience and enhancing the edge coverage are needed.

[ Invention ]

The invention aims to solve the technical problem of providing a double-channel variable-frequency micro-distribution uplink service processing method and a double-channel variable-frequency micro-distribution uplink service processing system, which can improve uplink service experience and enhance the edge coverage capability of a room subsystem.

In order to solve the technical problems, the invention provides a double-channel variable frequency micro-distribution system, which comprises a near-end unit connected between a remote radio module and a coupling node through a feeder line and a micro-distribution device connected with the coupling node through the feeder line; the micro-distribution device comprises an access unit connected with the coupling node, an extension unit connected with the access unit through a feeder line, and a far-end unit connected with the extension unit through the feeder line;

The near-end unit comprises a near-end uplink service processing module, a first combiner/divider and a second combiner/divider, a first coupler and a second coupler, wherein the first combiner/divider is connected with the near-end uplink service processing module, the first coupler is connected with the first combiner/divider and the near-end uplink service processing module, and the second coupler is connected with the second combiner/divider and the near-end uplink service processing module;

the access unit comprises an access terminal uplink service processing module, a first power supply module connected with the access terminal uplink service processing module, and a first power interface connected with the access terminal uplink service processing module and the first power supply module and used for supplying power;

the remote unit comprises a remote uplink service processing module, a second power supply module connected with the remote uplink service processing module, and a second power interface connected with the remote uplink service processing module and the second power supply module and used for supplying power;

the near-end uplink service processing module is used for acquiring synchronous signals of uplink and downlink signals, carrying out frequency conversion processing on the uplink frequency-shift signals received from the first combiner/divider and the second combiner/divider respectively to the original frequency band of the uplink and downlink signals to form uplink signals, carrying out low-noise amplification processing again, and outputting the uplink signals through the first coupler and the second coupler respectively in uplink time slots indicated by the synchronous signals;

the first coupler and the second coupler are respectively coupled with uplink and downlink signals of different channels; the first combiner/divider and the second combiner/divider respectively perform combining and dividing processing on uplink and downlink signals of different channels;

the access terminal uplink service processing module acquires a downlink signal from the coupling node, acquires a synchronous signal from the downlink signal, modulates the synchronous signal to a second frequency band different from the original frequency band, generates a modulated synchronous modulation signal, and sends the modulated synchronous modulation signal to the expansion unit through the first feed module; and coupling the uplink frequency shift signal received by the first feed module to the coupling node;

The expansion unit receives the uplink frequency shift signal sent by the remote unit, and sends the uplink frequency shift signal to the access unit after being subjected to branching treatment; receiving the synchronous modulation signal sent by the access unit, and sending the synchronous modulation signal to the remote unit after being subjected to branching treatment;

The remote uplink service processing module receives the synchronous modulation signal through the second feed module, demodulates the synchronous modulation signal to obtain the synchronous signal, performs low-noise amplification processing on the received uplink signal in an uplink time slot indicated by the synchronous signal, performs frequency conversion processing on the uplink signal to form an uplink frequency shift signal in a first frequency band different from the original frequency band and the second frequency band, performs branching processing through the fourth combiner/branching device, and sends the uplink frequency shift signal to the expansion unit through the second feed module.

Further, the near-end uplink service processing module comprises a third coupler connected with the first coupler, a first low-noise amplifier module connected with the second coupler, a second low-noise amplifier module connected with the third coupler, a first synchronization module connected with the first synchronization module, a first control module connected with the first low-noise amplifier module and the second low-noise amplifier module, a first frequency mixing module connected with the first low-noise amplifier module and the first combiner/divider, and a second frequency mixing module connected with the second low-noise amplifier module and the second combiner/divider;

The third coupler is used for coupling the uplink and downlink signals from the first coupler and sending the uplink and downlink signals to the first synchronization module; and coupling the uplink signal sent by the second low noise amplifier module to the first coupler;

the first synchronization module acquires the synchronization signal of the uplink and downlink signals and sends uplink indication signaling to the first control module according to the uplink time slot indicated by the synchronization signal;

The first control module controls the first low-noise amplification module and the second low-noise amplification module to start output according to the uplink indication signaling;

The first low-noise amplification module receives the uplink signal, performs low-noise amplification processing, and outputs the uplink signal subjected to the low-noise amplification processing to the second coupler under the control of the first control module;

The second low-noise amplification module receives the uplink signal, performs low-noise amplification processing, and outputs the uplink signal subjected to the low-noise amplification processing to the third coupler under the control of the first control module;

The first frequency mixing module receives the uplink frequency shift signal through the first combiner/divider, converts the uplink frequency shift signal into the original frequency band to form the uplink signal, and sends the uplink signal to the first low-noise amplification module;

The second frequency mixing module receives the uplink frequency shift signal through the second combiner/divider, converts the uplink frequency shift signal into the original frequency band to form the uplink signal, and then sends the uplink signal to the second low-noise amplification module.

Further, the access end uplink service processing module comprises a fourth coupler connected with the coupling node, a second synchronization module connected with the fourth coupler, a modulation module connected with the second synchronization module, and a third combiner/divider connected with the modulation module, wherein the fourth coupler and the first feed module are connected with each other;

The fourth coupler acquires the downlink signal and sends the downlink signal to the second synchronization module; and coupling the upstream frequency-shifted signal transmitted by the third combiner/divider to the coupling node;

The second synchronization module acquires the synchronization signal of the downlink signal and sends the synchronization signal to the modulation module;

The modulation module modulates the synchronous signal to the second frequency band, generates a modulated synchronous modulation signal and sends the modulated synchronous modulation signal to the third combiner/divider;

The third combiner/divider receives the uplink frequency shift signal through the first feed module, divides the uplink frequency shift signal and sends the uplink frequency shift signal to the fourth coupler; and receiving the synchronous modulation signal sent by the modulation module, carrying out combining processing and then sending the synchronous modulation signal to the first feed module.

Further, the remote uplink service processing module comprises a fourth combiner/divider connected with the second feeding module, a demodulation module and a frequency conversion module connected with the fourth combiner/divider, a third low-noise amplifier module connected with the frequency conversion module, a second control module connected with the demodulation module and the third low-noise amplifier module, and a first antenna module connected with the third low-noise amplifier module;

The fourth combiner/divider receives the synchronous modulation signal, performs combining processing and then sends the synchronous modulation signal to the demodulation module; the uplink frequency shift signal is received, split-circuit processing is carried out, and then the signal is sent to the second feed module;

the demodulation module receives the synchronous modulation signal, obtains the synchronous signal after demodulation processing, and sends an uplink indication signaling to the second control module according to an uplink time slot indicated by the synchronous signal;

the second control module controls the third low noise amplifier module to work according to the uplink indication signaling;

The third low-noise amplification module receives the uplink signal, performs low-noise amplification under the control of the second control module, and outputs the uplink signal subjected to the low-noise amplification to the frequency conversion module;

the frequency conversion module is used for converting the uplink signal into the first frequency band to form an uplink frequency shift signal, and then transmitting the uplink frequency shift signal to the fourth combiner/divider;

and the first antenna module receives an uplink signal sent by the user terminal and sends the uplink signal to the third low-noise amplifier module.

Further, the near-end unit further comprises a signal generator connecting the first combiner/divider and the second combiner/divider;

The signal generator is used for transmitting test signals of a third frequency band which is different from the original frequency band, the first frequency band and the second frequency band to the first combiner/divider and the second combiner/divider;

The first combiner/divider and the second combiner/divider receive the test signal, and output the test signal to the coupling node after being divided.

Further, the remote uplink service processing module further comprises a power detection module connected with the fourth combiner/divider and the second control module;

The fourth combiner/divider receives the test signal sent by the near-end unit through the second feeding module, combines the test signal and sends the combined test signal to the power detection module;

the power detection module receives the test signal, detects the level value of the test signal, subtracts the level value from the preset transmission power value of the test signal to obtain a far-end level loss value, and sends the far-end level loss value to the second control module;

And the second control module adds the preset bias value to the far-end level loss value and the preset far-end reserved power value to obtain a far-end gain value, and correspondingly adjusts the uplink gain of the third low-noise amplifier module according to the far-end gain value.

Further, the remote uplink service processing module further comprises a fourth low-noise amplifier module connected between the fourth combiner/divider and the second control module, and a second antenna module connected with the fourth low-noise amplifier module;

The fourth low-noise amplification module receives the uplink signal through the second antenna module, performs low-noise amplification under the control of the second control module, and outputs the uplink signal after the low-noise amplification to the fourth combiner/divider;

The second antenna module receives an uplink signal sent by the user terminal;

And the second control module controls the fourth low noise amplifier module to work according to the uplink indication signaling.

In order to solve the technical problem, the invention also provides an indoor distribution system which comprises an indoor baseband processing unit, a coupling node, a remote radio module connected with the indoor baseband processing unit, the dual-channel variable frequency micro-distribution system connected between the remote radio module and the coupling node, and an antenna device connected with the coupling node.

In order to solve the technical problems, the invention also provides a double-channel variable-frequency micro-distribution uplink service processing method, which comprises the following steps:

s1, a near-end unit obtains a downlink signal through a two-channel of a radio frequency remote module, obtains an uplink signal through a two-channel of a coupling node, and obtains a synchronous signal from the uplink signal or the downlink signal;

S2, the access unit acquires the downlink signal through a coupling node, acquires a synchronous signal from the downlink signal, modulates the synchronous signal to a second frequency band which is different from the original frequency band of the uplink and downlink signals, generates a modulated synchronous modulation signal, and sends the modulated synchronous modulation signal to a remote unit through an expansion unit;

S3, the remote unit demodulates the synchronous modulation signal to obtain the synchronous signal, performs low-noise amplification processing on the received uplink signal, and frequency-converts the uplink signal to a first frequency band different from the original frequency band, wherein the first frequency band forms an uplink frequency shift signal, and the uplink frequency shift signal is sent to the access unit through the expansion unit in an uplink time slot indicated by the synchronous signal;

s4, the access unit couples the uplink frequency shift signal to the coupling node;

S5, the near-end unit obtains the uplink frequency shift signal from the coupling node through a double channel, performs frequency conversion processing to the original frequency band to form an uplink signal, performs low noise amplification processing again, and outputs the uplink signal through the double channel in an uplink time slot indicated by the synchronous signal.

Further, the dual-channel variable-frequency micro-distribution uplink service processing method further comprises the following steps:

S6, the near-end unit generates a test signal of a third frequency band which is different from the original frequency band, the first frequency band and the second frequency band, and the test signal is sent to the far-end unit through the expansion unit;

S7, the remote unit receives the test signal, and subtracts the level value of the test signal detected by the remote unit from the preset transmission power value of the test signal to obtain a remote level loss value; and adding the preset bias value to the far-end level loss value and the preset far-end reserved power value to obtain a far-end gain value, and correspondingly adjusting the uplink gain of the device according to the far-end gain value.

Compared with the prior art, the invention has the following beneficial effects: the dual-channel variable frequency micro-distribution system of the embodiment of the invention is a four-level architecture and comprises a near-end unit, an access unit, an expansion unit and a far-end unit, wherein the near-end unit is connected with a host RRU, the NR signal and the variable frequency signal are processed by the dual channels, the access unit, the expansion unit and the far-end unit can be connected with any coupling node in the DAS system, the far-end unit is deployed in an edge coverage area, the uplink capacity of the edge coverage area of the DAS system can be greatly improved, the uplink service experience of users is improved, and a feeder line can be utilized to take electricity without a power supply, so that the construction is convenient, and the application scene is rich; the remote unit can also dynamically adjust the uplink gain, so that the transmitting power of the uplink signal and the uplink frequency-shift signal can be ensured, and meanwhile, the power consumption of the whole system is low, and the electric energy can be saved.

[ Description of the drawings ]

FIG. 1 is a schematic view of an indoor distribution system according to an embodiment of the present invention;

FIG. 2 is a schematic view of a micro-dispensing device according to an embodiment of the present invention;

FIG. 3 is a block diagram of a proximal unit of a first embodiment of the invention;

fig. 4 is a block diagram of an access unit according to a first embodiment of the present invention;

fig. 5 is a block diagram of an expansion unit of the first embodiment of the present invention;

Fig. 6 is a diagram of the structure of a remote unit according to the first embodiment of the present invention;

FIG. 7 is a block diagram of a proximal unit of a second embodiment of the invention;

Fig. 8 is a diagram of a remote unit according to a second embodiment of the present invention;

fig. 9 is a construction diagram of a remote unit according to a third embodiment of the present invention;

fig. 10 is a construction diagram of a remote unit according to a fourth embodiment of the present invention;

Fig. 11 is a step diagram of a dual-channel variable frequency micro-distribution uplink service processing method according to an embodiment of the invention.

[ Detailed description ] of the invention

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.

It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged where appropriate to implement in other sequences than those of the embodiments of the application.

Referring to fig. 1, the indoor distribution system of the embodiment of the invention includes an indoor baseband processing unit, a coupling node, a remote radio unit (RRU, radio Remote Unit) connected to the indoor baseband processing unit, a dual-channel variable frequency micro-distribution system connected between the remote radio unit and the coupling node, and an antenna device connected to the coupling node.

Specifically, in this embodiment, the dual-channel variable frequency micro-distribution system includes a near-end unit connected between the remote radio module and the coupling node through a feeder line, and a micro-distribution device connected to the coupling node through the feeder line. The near-end unit is in a dual-channel parallel processing mode, and each channel can process NR (New Redio, new air interface) signals and variable frequency signals simultaneously, so that double-channel uplink double-flow MIMO (Multiple-Input Multiple-Output) performance is realized.

As shown in fig. 2, in the embodiment of the present invention, the micro distribution device includes an access unit connected to the coupling node, an extension unit connected to the access unit through a feeder line, and a remote unit connected to the extension unit through a feeder line.

In this embodiment, the micro-distribution device may be connected in series with any one of the coupling nodes through the feeder line, and the coupling node may be a coupling port of the coupler. In order to enhance the uplink traffic experience of a user terminal at a signal coverage edge location, a micro-distribution device may be deployed at the signal coverage edge location of an existing antenna device.

In this embodiment, the access unit, the extension unit, and the remote unit are connected by a feeder line, and can mutually get electricity from each other, or can connect with an external power supply through a power interface of the remote unit and serve as a power supply main body to supply power to each other, so that the site construction is convenient, and in a scene with weaker signal coverage, even if no power supply exists, the remote unit can get electricity from the equipment by the feeder line, and the signal coverage rate can be improved.

In addition, in this embodiment, the expansion units may have a multi-stage structure, one upper expansion unit may be connected to one or more lower expansion units, one lower expansion unit may be connected to one or more lower expansion units, and the last expansion unit is connected to the remote unit.

Specifically, as shown in fig. 3, the near-end unit of the first embodiment of the present invention includes a near-end upstream service processing module, a first combiner/divider connected to the near-end upstream service processing module, a second combiner/divider connected to the first combiner/divider and the near-end upstream service processing module, and a second coupler connected to the second combiner/divider and the near-end upstream service processing module.

In this embodiment, the first coupler and the second coupler couple uplink and downlink signals of different channels respectively; the first combiner/divider and the second combiner/divider respectively perform combining and dividing processing on uplink and downlink signals of different channels.

The near-end uplink service processing module acquires synchronous signals of uplink and downlink signals, carries out frequency conversion processing on uplink frequency-shift signals received from the first combiner/divider and the second combiner/divider respectively to the original frequency band of the uplink and downlink signals to form the uplink signals, carries out low-noise amplification processing again, and outputs the uplink signals through the first coupler and the second coupler respectively in uplink time slots indicated by the synchronous signals.

Specifically, in this embodiment, the near-end uplink service processing module includes a third coupler connected to the first coupler, a first low-noise amplifier module connected to the second coupler, a second low-noise amplifier module connected to the third coupler, a first synchronization module connected to the first synchronization module, a first control module connected to the first low-noise amplifier module and the second low-noise amplifier module, a first mixing module connected to the first low-noise amplifier module and the first combiner/splitter, and a second mixing module connected to the second low-noise amplifier module and the second combiner/splitter.

The third coupler is used for coupling the uplink and downlink signals from the first coupler and sending the uplink and downlink signals to the first synchronization module; and coupling the uplink signal sent by the second low noise amplifier module to the first coupler.

The first synchronization module acquires the synchronization signals of the uplink and downlink signals and sends uplink indication signaling to the first control module according to the uplink time slot indicated by the synchronization signals.

And the first control module controls the first low-noise amplification module and the second low-noise amplification module to start output according to the uplink indication signaling.

The first low-noise amplification module receives the uplink signal, performs low-noise amplification processing, and outputs the uplink signal subjected to the low-noise amplification processing to the second coupler under the control of the first control module.

The second low-noise amplification module receives the uplink signal, performs low-noise amplification processing, and outputs the uplink signal subjected to the low-noise amplification processing to the third coupler under the control of the first control module.

The first frequency mixing module receives the uplink frequency shift signal through the first combiner/divider, converts the uplink frequency shift signal into an original frequency band to form an uplink signal, and sends the uplink signal to the first low-noise amplification module.

The second frequency mixing module receives the uplink frequency shift signal through the second combiner/divider, converts the uplink frequency shift signal into an original frequency band to form an uplink signal, and sends the uplink signal to the second low-noise amplification module.

In this embodiment, the near-end unit may connect the remote radio module and the coupling node through a dual-channel feeder, so as to perform coupling mixing transmission on the multi-channel signal, and one feeder may have a dual-channel uplink frequency shift signal, an uplink signal and a downlink signal at the same time, thereby further improving uplink service experience.

As shown in fig. 4, the access unit of the first embodiment of the present invention includes an access terminal uplink service processing module, a first power supply module connected to the access terminal uplink service processing module, and a first power interface for supplying power to the access terminal uplink service processing module and the first power supply module.

The access terminal uplink service processing module acquires a downlink signal from the coupling node, acquires a synchronous signal from the downlink signal, modulates the synchronous signal to a second frequency band different from the original frequency band, generates a modulated synchronous modulation signal, and sends the modulated synchronous modulation signal to the expansion unit through the first feed module; and coupling the uplink frequency shift signal received by the first feed module to the coupling node.

Specifically, the access terminal uplink service processing module comprises a fourth coupler connected with the coupling node, a second synchronous module connected with the fourth coupler, a modulation module connected with the second synchronous module, and a third combiner/divider connected with the modulation module, wherein the fourth coupler and the first feed module are connected with each other.

A fourth coupler for acquiring uplink and downlink signals and transmitting the uplink and downlink signals to the second synchronization module; and coupling the upstream frequency-shifted signal transmitted by the third combiner/divider to the coupling node.

And the second synchronization module acquires the synchronization signals of the uplink and downlink signals and sends the synchronization signals to the modulation module.

And the modulation module modulates the synchronous signal to the second frequency band, generates a modulated synchronous modulation signal and sends the modulated synchronous modulation signal to the third combiner/divider.

The third combiner/divider receives the uplink frequency shift signal through the first feed module, divides the uplink frequency shift signal and sends the uplink frequency shift signal to the fourth coupler; and receiving the synchronous modulation signal sent by the modulation module, carrying out combining processing and then sending the synchronous modulation signal to the first feed module.

Specifically, in this embodiment, the frequency bands of the synchronous modulation signal and the uplink and downlink signals are different, and the frequency bands of the uplink frequency shift signal and the uplink and downlink signals sent by the remote unit are also different.

In this embodiment, the extension unit receives the uplink frequency-shift signal sent by the remote unit, and sends the uplink frequency-shift signal to the access unit after the uplink frequency-shift signal is split; and receiving the synchronous modulation signal sent by the access unit, and sending the synchronous modulation signal to the remote unit after being subjected to branching treatment.

As shown in fig. 5, the extension unit of the first embodiment of the present invention includes a power divider, a third power feeding module connected to the power divider, and a third power interface for supplying power connected to the third power feeding module.

The third feed module is used for acquiring electric energy through a third power interface or a feeder line and transmitting synchronous modulation signals and uplink frequency shift signals.

And the power divider is used for carrying out branching processing on the uplink frequency shift signal and the synchronous modulation signal and outputting the signals.

In this embodiment, the power divider is a passive device, and no power supply is required. The third power interface may provide power to the access unit and the remote unit.

As shown in fig. 6, the remote unit of the first embodiment of the present invention includes a remote uplink service processing module, a second power supply module connected to the remote uplink service processing module, and a second power interface for supplying power to the remote uplink service processing module and the second power supply module.

The remote uplink service processing module receives the synchronous modulation signal through the second feed module, demodulates the synchronous modulation signal to obtain a synchronous signal, performs low-noise amplification processing on the received uplink signal in an uplink time slot indicated by the synchronous signal, performs frequency conversion processing on the uplink signal to a first frequency band different from an original frequency band and a second frequency band to form an uplink frequency shift signal, performs branching processing through a fourth combiner/branching device, and sends the uplink frequency shift signal to the expansion unit through the second feed module.

Specifically, in this embodiment, the remote uplink service processing module includes a fourth combiner/splitter connected to the second feeding module, a demodulation module and a frequency conversion module connected to the fourth combiner/splitter, a third low noise amplifier module connected to the frequency conversion module, a second control module connected to the demodulation module and the third low noise amplifier module, and a first antenna module connected to the third low noise amplifier module.

A fourth combiner/divider for receiving the synchronous modulation signals, performing combining processing, and transmitting to the demodulation module; and receiving the uplink frequency shift signal, performing branching treatment, and transmitting the signal to the second feed module.

And the demodulation module is used for receiving the synchronous modulation signal, carrying out demodulation processing to obtain the synchronous signal, and sending an uplink indication signaling to the second control module according to the uplink time slot indicated by the synchronous signal.

And the second control module controls the third low-noise amplifier module to work according to the uplink indication signaling.

And the third low-noise amplification module receives the uplink signal, performs low-noise amplification under the control of the second control module, and outputs the uplink signal subjected to the low-noise amplification to the frequency conversion module.

The frequency conversion module is used for converting the uplink signal into a first frequency band to form an uplink frequency shift signal, and then transmitting the uplink frequency shift signal to the fourth combiner/divider.

And the first antenna module is used for receiving an uplink signal sent by the user terminal and sending the uplink signal to the third low-noise amplifier module.

As further shown in fig. 7, the near-end unit according to the second embodiment of the present invention further includes a signal generator connected to the first combiner/divider and the second combiner/divider.

And the signal generator is used for transmitting test signals of a third frequency band which is different from the original frequency band, the first frequency band and the second frequency band to the first combiner/divider and the second combiner/divider.

The first combiner/divider and the second combiner/divider receive the test signal, and output the test signal to the coupling node after the test signal is divided.

As shown in fig. 8, the remote uplink service module according to the second embodiment of the present invention further includes a power detection module connected to the fourth combiner/divider and the second control module.

And the fourth combiner/divider receives the test signal sent by the near-end unit through the second feed module, combines the test signals and sends the combined test signal to the power detection module.

The power detection module receives the test signal, detects the level value of the test signal, subtracts the level value from the preset transmission power value of the test signal to obtain a far-end level loss value, and sends the far-end level loss value to the second control module.

And the second control module adds the preset bias value to the far-end level loss value and the preset far-end reserved power value to obtain a far-end gain value, and correspondingly adjusts the uplink gain of the third low-noise amplifier module according to the far-end gain value.

Specifically, in this embodiment, the remote unit detects, through the power detection module, the level value of the test signal received by the remote unit, and compares the level value with the power value of the test signal sent by the signal generator of the near unit, to obtain the loss value of the test signal in the whole path from the near unit to the remote unit. Specifically, in this embodiment, the transmission path of the test signal includes, from top to bottom, a near-end unit, a coupling node, an access unit, a one-stage or multi-stage expansion unit, and a far-end unit. Specifically, the near-end unit sends a test signal to the access unit through the coupling node, the access unit couples the test signal through the fourth coupling port, and the test signal is sent to the first feed module after being combined by the third combiner/divider and is transmitted to the expansion unit through the feeder line. And then is received by the second feeder module of the remote unit via the transmission of the one or more expansion units.

In addition, the second control module obtains a remote gain value according to the offset value generated by the test signal and the uplink and downlink signals due to different frequency bands and the preset remote reserved power for further enhancing the power of the remote unit, and correspondingly adjusts the uplink gain of the third low noise amplifier module, thereby achieving the purposes of compensating line loss and improving the power of the uplink signal. As shown in fig. 9, the remote uplink service processing module according to the third embodiment of the present invention further includes a fourth low noise amplifier module connected between the fourth combiner/divider and the second control module, and a second antenna module connected to the fourth low noise amplifier module, on the basis of the first embodiment shown in fig. 4.

And the fourth low-noise amplification module receives the uplink signal through the second antenna module, performs low-noise amplification under the control of the second control module, and outputs the uplink signal subjected to the low-noise amplification to the fourth combiner/divider.

And the second antenna module is used for receiving an uplink signal sent by the user terminal.

And the second control module controls the fourth low-noise amplifier module to work according to the uplink indication signaling.

And the fourth combiner/divider is used for receiving the uplink signal processed by the fourth low-noise amplifier module, dividing the uplink signal and transmitting the uplink signal to the second feed module.

And the second feeding module is used for sending the uplink signal to the expansion unit.

The expansion unit transmits the uplink signal to the coupling node after one or more stages of transmission.

As shown in fig. 10, the remote uplink service processing module according to the fourth embodiment of the present invention further includes a fourth low noise amplifier module connected between the fourth combiner/divider and the second control module, and a second antenna module connected to the fourth low noise amplifier module, on the basis of the second embodiment shown in fig. 7.

And the fourth low-noise amplification module receives the uplink signal through the second antenna module, performs low-noise amplification under the control of the second control module, and outputs the uplink signal subjected to the low-noise amplification to the fourth combiner/divider.

And the second antenna module is used for receiving an uplink signal sent by the user terminal.

And the second control module controls the fourth low-noise amplifier module to work according to the uplink indication signaling.

And the second feeding module is used for sending the uplink signal to the expansion unit.

The expansion unit transmits the uplink signal to the coupling node after one or more stages of transmission.

Specifically, a group of antenna modules and a low-noise amplifier module are added in the third embodiment and the fourth embodiment of the present invention, so that the remote unit can receive two paths of uplink signals sent by the mobile phone through two paths of antenna modules, and can synchronously process a variable-frequency uplink frequency-shift signal and an un-variable-frequency uplink signal, and the two paths of signals are transmitted on a radio frequency line through frequency conversion. After reaching the near-end unit, the uplink frequency-shift signal and the uplink signal respectively travel different channels, thereby realizing two independent uplink signal transmission channels from the mobile phone to the base station RRU. In the third embodiment and the fourth embodiment, the near-end unit receives the non-converted uplink signal, and directly sends the non-converted uplink signal to the first coupler and the second coupler for coupling output after the non-converted uplink signal is split by the first combiner/splitter and the second combiner/splitter, and the non-converted uplink signal is not processed by the near-end uplink service processing module.

The first feeding module, the second feeding module and the third feeding module in the above embodiments may be devices such as a radio frequency feeder, a radio frequency isolator, and the like that can transmit a radio frequency network signal and a power signal at the same time. The first low-noise amplification module, the second low-noise amplification module, the third low-noise amplification module and the fourth low-noise amplification module can be devices capable of amplifying radio frequency signal power, such as a low-noise power amplifier, a radio frequency power amplifier and the like. The first antenna module and the second antenna module may be monopole antennas or dual polarized antennas, and may be internal antennas or external antennas with external radio frequency interfaces.

In addition, the coupler, the power divider, the combiner/divider, the low-noise amplifier module, the power supply module and the power interface are all devices with very low power consumption, and the power divider is a passive device, so that the power consumption of the micro-distributed uplink service processing device is lower, any unit in the device can be used as a power supply main body to supply power to the whole device, the implementation flexibility is greatly improved, and the micro-distributed uplink service processing device can be used in any occasion.

As shown in fig. 11, the dual-channel variable frequency micro-distribution uplink service processing method according to the first embodiment of the present invention includes the following steps:

S1, a near-end unit obtains a downlink signal through a two-channel of a radio frequency remote module, obtains an uplink signal through a two-channel of a coupling node, and obtains a synchronous signal from the uplink signal or the downlink signal;

S2, the access unit acquires a downlink signal through a coupling node, acquires a synchronous signal from the downlink signal, modulates the synchronous signal to a second frequency band different from the original frequency band of the uplink and downlink signals, generates a modulated synchronous modulation signal, and sends the modulated synchronous modulation signal to the remote unit through the expansion unit;

S3, the remote unit demodulates the synchronous modulation signal to obtain a synchronous signal, performs low-noise amplification processing on the received uplink signal, and frequency-converts the uplink signal to a first frequency band different from an original frequency band to form an uplink frequency-shift signal, and sends the uplink frequency-shift signal to the access unit through the expansion unit in an uplink time slot indicated by the synchronous signal;

s4, the access unit couples the uplink frequency shift signal to the coupling node;

S5, the near-end unit obtains an uplink frequency shift signal from the coupling node through a double channel, performs frequency conversion processing to an original frequency band to form an uplink signal, performs low noise amplification processing again, and outputs the uplink signal through the double channel in an uplink time slot indicated by the synchronous signal.

Specifically, in this embodiment, the expansion unit may have a one-stage or multi-stage structure, which does not affect the implementation of the present invention.

In this embodiment, the uplink and downlink signals include an uplink signal and a downlink signal, and the original frequency band of the uplink and downlink signals is an original frequency band including an unconverted uplink signal and an unconverted downlink signal. In addition, the near-end unit can acquire a downlink signal through the remote radio module, and acquire an uplink signal and an uplink frequency shift signal through the coupling node. The near-end unit can acquire the synchronization signal through the uplink signal and acquire the synchronization signal through the downlink signal.

In addition, the dual-channel variable frequency micro-distribution uplink service processing method of the second embodiment of the invention further comprises the following steps on the basis of the first embodiment:

S6, the near-end unit generates a test signal of a third frequency band which is different from the original frequency band, the first frequency band and the second frequency band, and the test signal is sent to the far-end unit through the expansion unit;

S7, the remote unit receives the test signal, and subtracts the level value of the test signal detected by the remote unit from the preset transmission power value of the test signal to obtain a remote level loss value; and adding the preset bias value to the far-end level loss value and the preset far-end reserved power value to obtain a far-end gain value, and correspondingly adjusting the uplink gain of the device according to the far-end gain value.

Specifically, the preset offset value refers to a deviation of power loss generated by the first frequency band of the test signal and the uplink signal due to different frequency bands. The preset remote reserved power refers to an additional added remote uplink gain value.

Specifically, in this embodiment, the near-end unit may generate and send the test signal during the system power-up initialization process, and may also generate and send the test signal in a predetermined fixed period, for example, 7 am or 7 pm on the first day of each month. The remote unit may also perform uplink gain compensation at the beginning of system power-up, or may perform remote uplink gain compensation within the predetermined period.

In summary, the dual-channel variable frequency micro-distribution system in the embodiment of the invention is a four-stage architecture, and comprises a near-end unit, an access unit, an expansion unit and a far-end unit, wherein the near-end unit is connected with a host RRU to process NR signals and variable frequency signals through dual channels, the access unit and the expansion unit, the far-end unit can be connected with any one coupling node in the DAS system, and the far-end unit is deployed in a downlink coverage edge area, so that the uplink capacity of the edge coverage area of the DAS system can be greatly improved, the uplink service experience of a user is improved, and a feeder line can be utilized to take electricity without a power supply, so that the construction is convenient, and the application scene is rich; the remote unit can also dynamically adjust the uplink gain, so that the transmitting power of the uplink signal and the uplink frequency-shift signal can be ensured, and meanwhile, the power consumption of the whole system is low, and the electric energy can be saved.

The foregoing examples only illustrate preferred embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that modifications and improvements can be made without departing from the spirit of the invention, such as combining different features of the various embodiments, which are all within the scope of the invention.

Claims (10)

1. The double-channel variable-frequency micro-distribution system is characterized by comprising a near-end unit connected between a remote radio module and a coupling node through a feeder line and a micro-distribution device connected with the coupling node through the feeder line; the micro-distribution device comprises an access unit connected with the coupling node, an extension unit connected with the access unit through a feeder line, and a far-end unit connected with the extension unit through the feeder line;

The near-end unit comprises a near-end uplink service processing module, a first combiner/divider and a second combiner/divider, a first coupler and a second coupler, wherein the first combiner/divider is connected with the near-end uplink service processing module, the first coupler is connected with the first combiner/divider and the near-end uplink service processing module, and the second coupler is connected with the second combiner/divider and the near-end uplink service processing module;

the access unit comprises an access terminal uplink service processing module, a first power supply module connected with the access terminal uplink service processing module, and a first power interface connected with the access terminal uplink service processing module and the first power supply module and used for supplying power;

the remote unit comprises a remote uplink service processing module, a second power supply module connected with the remote uplink service processing module, and a second power interface connected with the remote uplink service processing module and the second power supply module and used for supplying power;

the near-end uplink service processing module is used for acquiring synchronous signals of uplink and downlink signals, carrying out frequency conversion processing on the uplink frequency-shift signals received from the first combiner/divider and the second combiner/divider respectively to the original frequency band of the uplink and downlink signals to form uplink signals, carrying out low-noise amplification processing again, and outputting the uplink signals through the first coupler and the second coupler respectively in uplink time slots indicated by the synchronous signals;

the first coupler and the second coupler are respectively coupled with uplink and downlink signals of different channels; the first combiner/divider and the second combiner/divider respectively perform combining and dividing processing on uplink and downlink signals of different channels;

the access terminal uplink service processing module acquires a downlink signal from the coupling node, acquires a synchronous signal from the downlink signal, modulates the synchronous signal to a second frequency band different from the original frequency band, generates a modulated synchronous modulation signal, and sends the modulated synchronous modulation signal to the expansion unit through the first feed module; and coupling the uplink frequency shift signal received by the first feed module to the coupling node;

The expansion unit receives the uplink frequency shift signal sent by the remote unit, and sends the uplink frequency shift signal to the access unit after being subjected to branching treatment; receiving the synchronous modulation signal sent by the access unit, and sending the synchronous modulation signal to the remote unit after being subjected to branching treatment;

The remote uplink service processing module receives the synchronous modulation signal through the second feed module, demodulates the synchronous modulation signal to obtain the synchronous signal, performs low-noise amplification processing on the received uplink signal in an uplink time slot indicated by the synchronous signal, performs frequency conversion processing on the uplink signal to form an uplink frequency shift signal in a first frequency band different from the original frequency band and the second frequency band, performs branching processing through the fourth combiner/branching device, and sends the uplink frequency shift signal to the expansion unit through the second feed module.

2. The dual-channel variable frequency micro-distribution system of claim 1, wherein the near-end upstream service processing module comprises a third coupler connected to the first coupler, a first low-noise amplifier module connected to the second coupler, a second low-noise amplifier module connected to the third coupler, a first synchronization module connected to the first synchronization module, a first control module connected to the first low-noise amplifier module and the second low-noise amplifier module, a first mixing module connected to the first low-noise amplifier module and the first combiner/splitter, and a second mixing module connected to the second low-noise amplifier module and the second combiner/splitter;

The third coupler is used for coupling the uplink and downlink signals from the first coupler and sending the uplink and downlink signals to the first synchronization module; and coupling the uplink signal sent by the second low noise amplifier module to the first coupler;

the first synchronization module acquires the synchronization signal of the uplink and downlink signals and sends uplink indication signaling to the first control module according to the uplink time slot indicated by the synchronization signal;

The first control module controls the first low-noise amplification module and the second low-noise amplification module to start output according to the uplink indication signaling;

The first low-noise amplification module receives the uplink signal, performs low-noise amplification processing, and outputs the uplink signal subjected to the low-noise amplification processing to the second coupler under the control of the first control module;

The second low-noise amplification module receives the uplink signal, performs low-noise amplification processing, and outputs the uplink signal subjected to the low-noise amplification processing to the third coupler under the control of the first control module;

The first frequency mixing module receives the uplink frequency shift signal through the first combiner/divider, converts the uplink frequency shift signal into the original frequency band to form the uplink signal, and sends the uplink signal to the first low-noise amplification module;

The second frequency mixing module receives the uplink frequency shift signal through the second combiner/divider, converts the uplink frequency shift signal into the original frequency band to form the uplink signal, and then sends the uplink signal to the second low-noise amplification module.

3. The dual-channel variable frequency micro-distribution system of claim 1, wherein the access-side upstream service processing module comprises a fourth coupler connected to the coupling node, a second synchronization module connected to the fourth coupler, a modulation module connected to the second synchronization module, and a third combiner/divider connected to the modulation module, the fourth coupler and the first feed module;

The fourth coupler acquires the downlink signal and sends the downlink signal to the second synchronization module; and coupling the upstream frequency-shifted signal transmitted by the third combiner/divider to the coupling node;

The second synchronization module acquires the synchronization signal of the downlink signal and sends the synchronization signal to the modulation module;

The modulation module modulates the synchronous signal to the second frequency band, generates a modulated synchronous modulation signal and sends the modulated synchronous modulation signal to the third combiner/divider;

The third combiner/divider receives the uplink frequency shift signal through the first feed module, divides the uplink frequency shift signal and sends the uplink frequency shift signal to the fourth coupler; and receiving the synchronous modulation signal sent by the modulation module, carrying out combining processing and then sending the synchronous modulation signal to the first feed module.

4. The dual-channel variable frequency micro-distribution system of claim 1, wherein the remote uplink service processing module comprises a fourth combiner/divider connected to the second feed module, a demodulation module and a frequency conversion module connected to the fourth combiner/divider, a third low-noise amplifier module connected to the frequency conversion module, a second control module connected to the demodulation module and the third low-noise amplifier module, and a first antenna module connected to the third low-noise amplifier module;

The fourth combiner/divider receives the synchronous modulation signal, performs combining processing and then sends the synchronous modulation signal to the demodulation module; the uplink frequency shift signal is received, split-circuit processing is carried out, and then the signal is sent to the second feed module;

the demodulation module receives the synchronous modulation signal, obtains the synchronous signal after demodulation processing, and sends an uplink indication signaling to the second control module according to an uplink time slot indicated by the synchronous signal;

the second control module controls the third low noise amplifier module to work according to the uplink indication signaling;

The third low-noise amplification module receives the uplink signal, performs low-noise amplification under the control of the second control module, and outputs the uplink signal subjected to the low-noise amplification to the frequency conversion module;

the frequency conversion module is used for converting the uplink signal into the first frequency band to form an uplink frequency shift signal, and then transmitting the uplink frequency shift signal to the fourth combiner/divider;

and the first antenna module receives an uplink signal sent by the user terminal and sends the uplink signal to the third low-noise amplifier module.

5. The dual-channel variable frequency micro-distribution system of claim 2, wherein the near-end unit further comprises a signal generator connecting the first combiner/divider and the second combiner/divider;

The signal generator is used for transmitting test signals of a third frequency band which is different from the original frequency band, the first frequency band and the second frequency band to the first combiner/divider and the second combiner/divider;

The first combiner/divider and the second combiner/divider receive the test signal, and output the test signal to the coupling node after being divided.

6. The dual-channel variable frequency micro-distribution system according to claim 4, wherein the remote uplink service processing module further comprises a power detection module connected to the fourth combiner/divider and the second control module;

The fourth combiner/divider receives the test signal sent by the near-end unit through the second feeding module, combines the test signal and sends the combined test signal to the power detection module;

the power detection module receives the test signal, detects the level value of the test signal, subtracts the level value from the preset transmission power value of the test signal to obtain a far-end level loss value, and sends the far-end level loss value to the second control module;

And the second control module adds the preset bias value to the far-end level loss value and the preset far-end reserved power value to obtain a far-end gain value, and correspondingly adjusts the uplink gain of the third low-noise amplifier module according to the far-end gain value.

7. The dual-channel variable frequency micro-distribution system according to claim 4 or 6, wherein the remote uplink service processing module further comprises a fourth low noise amplifier module connected between the fourth combiner/divider and the second control module, and a second antenna module connected to the fourth low noise amplifier module;

The fourth low-noise amplification module receives the uplink signal through the second antenna module, performs low-noise amplification under the control of the second control module, and outputs the uplink signal after the low-noise amplification to the fourth combiner/divider;

The second antenna module receives an uplink signal sent by the user terminal;

And the second control module controls the fourth low noise amplifier module to work according to the uplink indication signaling.

8. An indoor distribution system, comprising an indoor baseband processing unit, a coupling node, a remote radio module connected to the indoor baseband processing unit, a dual-channel variable frequency micro-distribution system according to any one of claims 1 to 7 connected between the remote radio module and the coupling node, and an antenna device connected to the coupling node.

9. The double-channel variable-frequency micro-distribution uplink service processing method is characterized by comprising the following steps of:

s1, a near-end unit obtains a downlink signal through a two-channel of a radio frequency remote module, obtains an uplink signal through a two-channel of a coupling node, and obtains a synchronous signal from the uplink signal or the downlink signal;

S2, the access unit acquires the downlink signal through a coupling node, acquires a synchronous signal from the downlink signal, modulates the synchronous signal to a second frequency band which is different from the original frequency band of the uplink and downlink signals, generates a modulated synchronous modulation signal, and sends the modulated synchronous modulation signal to a remote unit through an expansion unit;

S3, the remote unit demodulates the synchronous modulation signal to obtain the synchronous signal, performs low-noise amplification processing on the received uplink signal, and frequency-converts the uplink signal to a first frequency band different from the original frequency band, wherein the first frequency band forms an uplink frequency shift signal, and the uplink frequency shift signal is sent to the access unit through the expansion unit in an uplink time slot indicated by the synchronous signal;

s4, the access unit couples the uplink frequency shift signal to the coupling node;

S5, the near-end unit obtains the uplink frequency shift signal from the coupling node through a double channel, performs frequency conversion processing to the original frequency band to form an uplink signal, performs low noise amplification processing again, and outputs the uplink signal through the double channel in an uplink time slot indicated by the synchronous signal.

10. The dual-channel variable frequency micro-distribution uplink service processing method as claimed in claim 9, further comprising:

S6, the near-end unit generates a test signal of a third frequency band which is different from the original frequency band, the first frequency band and the second frequency band, and the test signal is sent to the far-end unit through the expansion unit;

S7, the remote unit receives the test signal, and subtracts the level value of the test signal detected by the remote unit from the preset transmission power value of the test signal to obtain a remote level loss value; and adding the preset bias value to the far-end level loss value and the preset far-end reserved power value to obtain a far-end gain value, and correspondingly adjusting the uplink gain of the device according to the far-end gain value.