CN211791508U - Communication system - Google Patents
Communication system Download PDFInfo
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- CN211791508U CN211791508U CN202020426977.0U CN202020426977U CN211791508U CN 211791508 U CN211791508 U CN 211791508U CN 202020426977 U CN202020426977 U CN 202020426977U CN 211791508 U CN211791508 U CN 211791508U
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Abstract
The application discloses communication system belongs to communication technology field, including distal end unit and near-end unit, distal end unit is connected with the near-end unit electricity, and the distal end unit includes: the receiving module is used for receiving the combined communication signal sent by the near-end unit through the feeder line; the filtering module is electrically connected with the receiving module and used for extracting a first control signal from the combined communication signal; the digital processing and control module is electrically connected with the filtering module and used for acquiring a link loss value of the feeder line according to the first control signal; and adjusting the link gain of the communication system according to the link loss value. By adding a small number of components, the communication system can automatically and accurately calculate the link loss value of the feeder line according to the first control signal in the combined communication signal, and automatically adjust the link gain of the communication system according to the link loss value, so that the gain stability of the link of the communication system is ensured, and the use cost of the remote unit is effectively reduced.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a communication system.
Background
With the large-scale use of 4G networks and the gradual popularization of 5G networks, a Time Division Duplex (TDD) mode has become a mainstream and standard in the communication field. TDD mode is characterized by TDD, i.e. the same frequency band is used for transceiving, and the transceiving link is controlled to be turned on and off by time division. In operation, the system usually uses FPGA or other digital deframing method to provide uplink and downlink switch control signals. In dense indoor coverage where high bandwidth and high rate are required, these existing approaches result in increased cost at the remote end.
Today emphasizing resource reuse, operators want to use the existing indoor distribution system to realize signal coverage in TDD mode, but in the existing TDD system using radio frequency cable as remote transmission medium, the line loss of the feeder line cannot be estimated accurately, resulting in inaccurate detection of system link gain, thereby affecting gain dynamic balance and system stability.
SUMMERY OF THE UTILITY MODEL
The present application is proposed to solve the problems in the background art described above. Embodiments of the present application provide a communication system.
The application provides a communication system, including distal end unit and near-end unit, distal end unit is connected with the near-end unit electricity, and the distal end unit includes:
the receiving module is used for receiving the combined communication signal sent by the near-end unit through the feeder line;
the filtering module is electrically connected with the receiving module and used for extracting a first control signal from the combined communication signal;
the digital processing and control module is electrically connected with the filtering module and used for acquiring a link loss value of the feeder line according to the first control signal;
and adjusting the link gain of the communication system according to the link loss value.
Further, the remote unit further comprises:
the coupling module is arranged between the receiving module and the filtering module and used for carrying out power distribution on the combined communication signal so as to obtain a first shunt signal and a second shunt signal of the combined communication signal;
the filtering module is specifically configured to filter the first shunt signal to obtain the first control signal.
Further, the remote unit further comprises a first attenuation module, wherein
The digital processing and control module generates a first adjusting signal according to the link loss value;
the first attenuation module is respectively electrically connected with the digital processing and control module and the coupling module and is used for adjusting the gain of the second shunt signal according to the first adjusting signal.
Further, the remote unit further comprises a detection module:
the detection module is arranged between the filtering module and the digital processing and control module and is used for detecting the first control signal to acquire detection voltage of the first control signal;
the digital processing and control module is used for obtaining a link loss value of the feeder line according to the detection voltage of the first control signal and a preset reference voltage.
Further, the remote unit further comprises a second attenuation module, wherein
The digital processing and control module is used for generating a second adjusting signal when the chain loss value is smaller than a first preset value or larger than a second preset value;
the second attenuation module is arranged between the filtering module and the detection module, is electrically connected with the digital processing and control module, and is used for adjusting the signal intensity of the first control signal according to the second adjusting signal and inputting the adjusted first control signal into the detection module.
Further, the proximal end unit includes:
the signal source module is used for generating a first control signal;
the baseband processing and control module is used for generating a second control signal;
the radio frequency module is electrically connected with the baseband processing and control module and is used for generating a second shunt signal;
the switch control module is respectively electrically connected with the information source module and the baseband processing and control module and is used for generating and generating a first shunt signal for sending to the remote unit according to the first control signal and the second control signal;
and the combining module is respectively electrically connected with the radio frequency module and the switch control module and is used for generating a combining communication signal according to the first shunt signal and the second shunt signal.
Further, the digital processing and control module is further configured to:
comparing the detected voltage of the first control signal with a reference voltage;
and if the comparison result is within the preset range, performing switching protection processing and time delay inversion processing on the second control signal to obtain a third control signal.
Compared with the prior art, the method has the following technical effects:
the method comprises the steps of firstly receiving a combined communication signal sent by a near-end unit through a feeder line through a receiving module in a far-end unit, then extracting a first control signal from the combined communication signal through a filtering module, finally obtaining a link loss value of the feeder line through a digital processing and control module according to the first control signal, and then adjusting the link gain of a communication system according to the link loss value. By adding a small number of components, the link loss value of the feeder line is automatically and accurately calculated, the link gain of the communication system is automatically adjusted according to the link loss value, the gain stability of the communication system link is ensured, the number of added components is small, and the use cost of the remote unit is effectively reduced.
Drawings
The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.
Fig. 1 is a block diagram of a communication system according to a first exemplary embodiment of the present application.
Fig. 2 is a block diagram of a communication system according to a second exemplary embodiment of the present application.
Fig. 3 is a block diagram of a communication system according to a third exemplary embodiment of the present application.
Detailed Description
Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and that the present application is not limited by the example embodiments described herein.
The method aims at solving the problems that when a communication system in the prior art works in a TDD mode, an FPGA or other digital frame decoding modes are generally used for providing uplink and downlink switch control signals, and in indoor dense coverage requiring high bandwidth and high speed, the existing modes bring the problem of increasing the remote cost, and in the existing TDD system using a radio frequency cable as a remote transmission medium, the line loss of a feeder line cannot be accurately estimated, so that the detection on the system link gain is inaccurate, and the dynamic balance of the gain and the system stability are influenced. In the technical solution of gain control of a communication system provided in the embodiment of the present application, a far-end unit may extract a first control signal from a combined communication signal sent by a near-end unit through a feeder line, then automatically and accurately calculate a link loss value of the feeder line according to the first control signal, and automatically adjust a link gain of the communication system according to the link loss value, thereby ensuring a stable gain of a link of the communication system and effectively reducing a use cost of the far-end unit.
As a specific embodiment of the present application, the embodiments of the present application will be described in detail by using detection of a link loss value of a TDD system and adjusting a link gain according to the link loss value.
Fig. 1 is a block diagram of a communication system according to a first exemplary embodiment of the present application. The present embodiment includes a distal unit 100 and a proximal unit 200, the distal unit 100 is electrically connected to the proximal unit 200, the distal unit 100 includes:
a receiving module 101, configured to receive a combined communication signal sent by a near-end unit through a feeder line;
a filtering module 102, electrically connected to the receiving module 101, for extracting the first control signal from the combined communication signal;
the digital processing and control module 103 is electrically connected with the filtering module 102 and is used for acquiring a link loss value of the feeder line according to a first control signal;
and adjusting the link gain of the communication system according to the link loss value.
Specifically, in TDD systems, as well as other communication systems, there is generally included a near-end unit 200 and a far-end unit 100. The near-end unit 200 is mainly used for generating and receiving various communication signals, such as radio frequency signals, dot frequency signals, uplink switch control signals, downlink switch control signals, ASK signals, and the like, and the far-end unit 100 receives the communication signals from the near-end unit 200 to realize indoor signal coverage of different requirements. In the communication system, since each communication signal in the near-end unit 200 has a different frequency band, it is necessary to combine the input signals in multiple frequency bands to form a combined communication signal, and output the combined communication signal to each far-end unit 100 through the feeder line.
After the receiving unit 101 receives the combined communication signal sent by the near-end unit 200 through the feeder line, the filtering module 102 may extract a first control signal from the combined communication signal, where the first control signal may be, for example, a dot-frequency signal. After the dot frequency signal is detected, the voltage value of the dot frequency signal can be obtained, and the digital processing and control module 103 compares the voltage value of the dot frequency signal with a preset reference voltage to obtain the link loss value of the feeder line. The digital processing and control module 103 can adjust the link gain of the communication system according to the link loss value of the feeder line. Therefore, the link loss value of the link can be automatically and accurately detected, the link gain can be automatically adjusted, the gain stability of the system link can be ensured, and the station opening efficiency of site construction can be improved.
Further, as shown in fig. 2, the remote unit 100 further includes:
the coupling module 104 is disposed between the receiving module 101 and the filtering module 102, and configured to perform power distribution on the combined communication signal to obtain a first shunt signal and a second shunt signal of the combined communication signal;
the filtering module 102 is specifically configured to filter the first shunt signal to obtain a first control signal.
Specifically, in the communication system, the power of the communication signal input to each remote unit 100 is different, and therefore, it is necessary to perform power distribution on the combined communication signal and input the combined communication signal to each remote unit 100.
The coupling module 104 may perform power distribution on the branch signals in the branch communication signals, so that the power of the branch signals may satisfy the normal operation of each remote unit 100. For example, the coupling module 104 may perform power distribution on a first split signal, which may be an ASK signal, and a second split signal, which may be a radio frequency signal. After the ASK signal is power-distributed, the first control signal may be obtained by the filtering module 102, and the first control signal may be a dot frequency signal. The detection of the chain loss value can be carried out after the dot frequency signal is extracted.
Further, as shown in FIG. 2, the remote unit 100 further comprises a first attenuation module 105, wherein
The digital processing and control module 103 is configured to generate a first adjustment signal according to the link loss value;
the first attenuation module 105 is electrically connected to the digital processing and control module 103 and the coupling module 104, respectively, and is configured to adjust a gain of the second branch signal according to the first adjustment signal.
Specifically, after obtaining the link loss value of the feeder line according to the voltage value of the dot frequency signal, the digital processing and control module 103 may determine the link loss degree of the feeder line from the near-end unit 200 to the far-end unit 100 according to the size of the link loss value, then generate a first adjusting signal according to the link loss value, and control the first attenuation module 105 to adjust the second branch signal, for example, the attenuation value of the radio frequency signal, through the first adjusting signal, thereby adjusting the gain of the system link, and making the gain of the system link always in power balance.
In addition, as shown in fig. 2, a radio frequency signal processing module may be added to perform filtering, controlling, amplifying and other processing on the adjusted radio frequency signal according to actual requirements, and then output the radio frequency signal.
Further, as shown in fig. 2, the remote unit 100 further comprises a detection module 106:
the detection module 106 is disposed between the filtering module 102 and the digital processing and control module 103, and is configured to perform detection processing on the first control signal to obtain a detection voltage of the first control signal;
the digital processing and control module 103 is configured to obtain a link loss value of the feeder line according to the detection voltage of the first control signal and a preset reference voltage.
Specifically, in the embodiment of the present application, the detection module 106 detects the first control signal, for example, the dot frequency signal, and reads the detection voltage of the dot frequency signal. The digital processing and control module 103 compares the detection voltage of the dot frequency signal with the preset reference voltage according to the preset reference voltage, so as to obtain the link loss value of the feeder line. The preset reference voltage can be set according to actual requirements, and the embodiment of the application is not particularly limited.
Further, as shown in fig. 2, the remote unit 100 further comprises a second attenuation module 107:
the digital processing and control module 103 is configured to generate a second adjustment signal when the link loss value is smaller than the first preset value or larger than the second preset value;
the second attenuation module 107 is disposed between the filtering module 102 and the detecting module 106, and is electrically connected to the digital processing and control module 103, and is configured to adjust the signal strength of the first control signal according to the second adjustment signal, and input the adjusted first control signal into the detecting module 106.
Specifically, since the signal strength of the dot frequency signal is limited, the signal detection range of the detection module 106 is also limited, and the detection accuracy is affected by too large or too small of the dot frequency signal, the signal strength of the dot frequency signal can be adjusted by the second attenuation module 107. When the link loss value is smaller than the first preset value, it indicates that the detection voltage is large and the signal intensity of the dot frequency signal is high, and at this time, the digital processing and control module 103 generates a second adjustment signal and controls the second attenuation module 107 to attenuate the dot frequency signal; when the link loss value is greater than the second preset value, it indicates that the detection voltage is smaller, and the signal strength of the dot frequency signal is greater, at this time, the digital processing and control module 103 generates a second adjustment signal, and controls the second attenuation module 107 to amplify the dot frequency signal.
Further, as shown in fig. 3, the proximal end unit 200 includes:
a source module 201, configured to generate a first control signal;
a baseband processing and control module 202 for generating a second control signal;
the radio frequency module 203 is electrically connected with the baseband processing and control module 202 and is used for generating a second shunt signal;
the switch control module 204 is electrically connected with the signal source module 201 and the baseband processing and control module 202, and is configured to generate a first shunt signal according to the first control signal and the second control signal;
and a combining module 205, electrically connected to the radio frequency module 203 and the switch control module 204, respectively, and configured to generate a combined communication signal for sending to the remote unit 100 according to the first branch signal and the second branch signal.
Specifically, the near-end unit 200 is mainly used for generating and receiving various communication signals. In the embodiment of the present application, the source module 201 generates a first control signal, for example, a dot frequency signal. The baseband processing and control module 202 generates a second control signal, such as a downlink switch control signal. The rf module 203 generates a second drop signal, such as an rf signal. The switch control module 204 may generate a first shunt signal, such as an ASK signal, according to the dot frequency signal and the downlink switch control signal. The combining module 205 sums the ASK signal and the radio frequency signal and outputs the sum as a combined communication signal.
Further, the digital processing and control module 103 is further configured to:
comparing the detected voltage of the first control signal with a reference voltage;
and if the comparison result is within the preset range, performing switching protection processing and time delay inversion processing on the second control signal to obtain a third control signal.
Specifically, in the embodiment of the present application, the control signal may be restored. For example, when the second control signal is a downlink switch control signal, the digital processing and control module 103 compares the detection voltage with the reference voltage, and if the comparison result is within a preset range, for example, the comparison result is a low level, the digital processing and control module 103 may recognize that the second control signal is the downlink switch control signal, and may obtain the uplink switch control signal, that is, the third control signal, after performing the switch protection processing and the delay inversion processing on the downlink switch control signal. After the control signal of the uplink switch is recovered, each path of switch in the communication system can be controlled.
It should be noted that the second control signal may also be an uplink switch control signal, and the downlink switch control signal may be obtained after the uplink switch control signal is subjected to switch protection processing and delay inversion processing, which is not limited in this application.
The foregoing describes the general principles of the present application in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present application are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present application. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the foregoing disclosure is not intended to be exhaustive or to limit the disclosure to the precise details disclosed.
The block diagrams of devices, apparatuses, systems referred to in this application are only given as illustrative examples and are not intended to require or imply that the connections, arrangements, configurations, etc. must be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".
It should also be noted that in the devices, apparatuses, and methods of the present application, the components or steps may be decomposed and/or recombined. These decompositions and/or recombinations are to be considered as equivalents of the present application.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.
Claims (7)
1. A communication system comprising a distal unit and a proximal unit, the distal unit being electrically connected to the proximal unit, the distal unit comprising:
the receiving module is used for receiving the combined communication signal sent by the near-end unit through the feeder line;
the filtering module is electrically connected with the receiving module and used for extracting a first control signal from the combined communication signal;
the digital processing and control module is electrically connected with the filtering module and used for acquiring a link loss value of the feeder line according to the first control signal;
and adjusting the link gain of the communication system according to the link loss value.
2. The communication system of claim 1, wherein said remote unit further comprises:
the coupling module is arranged between the receiving module and the filtering module and used for distributing power to the combined communication signal so as to obtain a first shunt signal and a second shunt signal of the combined communication signal;
the filtering module is configured to filter the first shunt signal to obtain the first control signal.
3. The communication system of claim 2, wherein said remote unit further comprises a first attenuation module, wherein
The digital processing and control module is used for generating a first adjusting signal according to the link loss value;
the first attenuation module is respectively electrically connected with the digital processing and control module and the coupling module and is used for adjusting the gain of the second shunt signal according to the first adjusting signal.
4. The communication system of claim 1, wherein said remote unit further comprises a detection module:
the detection module is arranged between the filtering module and the digital processing and control module and is used for detecting the first control signal to obtain a detection voltage of the first control signal;
and the digital processing and control module is used for acquiring the link loss value of the feeder line according to the detection voltage of the first control signal and a preset reference voltage.
5. The communication system of claim 4, wherein said remote unit further comprises a second attenuation module, wherein
The digital processing and control module is used for generating a second regulating signal when the link loss value is smaller than a first preset value or larger than a second preset value;
the second attenuation module is arranged between the filtering module and the wave detection module, is electrically connected with the digital processing and control module, and is used for adjusting the signal intensity of the first control signal according to the second adjusting signal and inputting the adjusted first control signal into the wave detection module.
6. The communication system of claim 5, wherein the near-end unit comprises:
the signal source module is used for generating the first control signal;
the baseband processing and control module is used for generating a second control signal;
the radio frequency module is electrically connected with the baseband processing and control module and is used for generating a second shunt signal;
the switch control module is respectively electrically connected with the information source module and the baseband processing and control module and is used for generating a first shunt signal according to the first control signal and the second control signal;
and the combining module is respectively electrically connected with the radio frequency module and the switch control module and is used for generating a combining communication signal for sending to the remote unit according to the first branch signal and the second branch signal.
7. The communication system of claim 6, wherein the digital processing and control module is further configured to:
comparing a detected voltage of the first control signal with a reference voltage;
and if the comparison result is within a preset range, performing switch protection processing and time delay inversion processing on the second control signal to obtain a third control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020426977.0U CN211791508U (en) | 2020-03-27 | 2020-03-27 | Communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020426977.0U CN211791508U (en) | 2020-03-27 | 2020-03-27 | Communication system |
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| CN211791508U true CN211791508U (en) | 2020-10-27 |
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| CN202020426977.0U Active CN211791508U (en) | 2020-03-27 | 2020-03-27 | Communication system |
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Address after: 510663 Shenzhou Road, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangdong, 10 Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 Shenzhou Road, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangdong, 10 Patentee before: Comba Telecom System (China) Ltd. |
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