CN115086988B - Passive network loss calibration method for 5G frequency conversion system - Google Patents
Passive network loss calibration method for 5G frequency conversion system Download PDFInfo
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- CN115086988B CN115086988B CN202210211442.5A CN202210211442A CN115086988B CN 115086988 B CN115086988 B CN 115086988B CN 202210211442 A CN202210211442 A CN 202210211442A CN 115086988 B CN115086988 B CN 115086988B
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- 230000010355 oscillation Effects 0.000 claims abstract description 9
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
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- 238000010586 diagram Methods 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a passive network loss calibration method of a 5G frequency conversion system, which comprises the following steps: s1, disconnecting any input signal connection of an access unit, and configuring the local oscillation frequency of the access unit as F2 center frequency; s2, a power detector of the access unit obtains a detection power value P1, a signal entering the coverage unit through the passive distribution network is mixed by a mixer of the coverage unit to obtain a signal F1, and the signal F1 is further processed by the power detector of the coverage unit to obtain a detection power value P2; s3, the access unit transmits the detection power value P1 to all coverage units through a monitoring link, and the coverage units calculate the total gain of the passive network insertion loss and the coverage unit gain; s4, the coverage unit compares the preset gain G0 with the total gain G1; s5, automatically adjusting the attenuation value of the adjustable attenuator of the covering unit until the preset gain G0 is equal to the total gain G1. The invention can realize automatic link loss calibration without increasing hardware cost, and obviously improves the cost performance of the frequency conversion system.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a passive network loss calibration method of a 5G frequency conversion system.
Background
The 5G mobile communication network has the remarkable technical advantages of high speed, ubiquitous, low power consumption and low time delay, but the requirements are difficult to meet in high-capacity indoor wireless signal coverage, the operation quality is low, and the experience effect is poor. At present, 80% of services for mobile communication are generated indoors. Therefore, how to develop a new generation indoor distribution system, to improve indoor wireless coverage quality of the 5G mobile communication network, has become a key common problem that needs to be solved in 5G network standard networking.
At present, most indoor common scenes have a huge number of passive indoor subsystem systems deployed in the 3G and 4G network infrastructure, mainly aiming at the application scheme, a plurality of radio frequency conversion systems are proposed in the industry, the system consists of an access unit and a coverage unit, a 5G single channel or double channels are moved to an idle frequency band suitable for the transmission of the current indoor distribution system through frequency conversion by the access unit, then after passing through the passive distribution network, the frequency is restored by the coverage unit, and the system is transmitted and covered by an antenna, so that a requirement distribution system for accessing 5G coverage on the basis of the current indoor subsystem is realized.
In the radio frequency conversion system, the routing of the distributed network reaching each coverage unit and the passing passive devices are not identical, so that the passive loss in the middle of each coverage unit is inconsistent with the corresponding access unit, and in practical engineering implementation, the uplink and downlink gains of the coverage units need to be adjusted according to different passive losses, so that the coverage units can transmit and receive the transmitting power of the signals under proper gains. The current common method is to manually adjust the adjustable attenuator of the covering unit through the actual station to achieve the purposes of long time consumption and poor effect, and some schemes use an external signal source as a reference model to perform loss measurement and gain setting before the equipment is started, so that the cost is increased.
Disclosure of Invention
The invention aims to provide a passive network loss calibration method of a 5G frequency conversion system, which overcomes the defects existing in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the passive network loss calibration method of the 5G frequency conversion system comprises an access unit and a plurality of coverage units connected with the access unit through a passive distribution network, and the passive network loss calibration method comprises the following steps:
s1, disconnecting any input signal connection of an access unit, configuring the local oscillation frequency of the access unit as F2 center frequency, and enabling the F2 center frequency to leak to a downlink passage after passing through a mixer of the access unit and enter a passive distribution network after being amplified by a downlink intermediate frequency amplifier of the access unit;
s2, a power detector of the access unit obtains a detection power value P1, a signal entering the coverage unit through the passive distribution network is mixed by a mixer of the coverage unit to obtain a signal F1, and the signal F1 is further processed by the power detector of the coverage unit to obtain a detection power value P2;
s3, the access unit transmits the detection power value P1 to all coverage units through a monitoring link, and the coverage units calculate to obtain the total gain G1=P2-P1 of the passive network insertion loss and the coverage unit gain;
s4, the coverage unit compares the preset gain G0 with the total gain G1;
and S5, when the preset gain G0 is not equal to the total gain G1, automatically adjusting the attenuation value of the adjustable attenuator of the covering unit until the preset gain G0 is equal to the total gain G1, and completing the passive network loss calibration.
Further, the frequency of the signal F1 is 3400-3600MHz, and the center frequency of the signal F2 is 700MHz.
Compared with the prior art, the invention has the advantages that: the invention provides a passive network loss calibration method of a 5G frequency conversion system, which is characterized in that an existing circuit architecture of an access unit is adopted, the transmission of a reference signal is realized on the basis of changing the local oscillation frequency of the access unit and by means of local oscillation leakage characteristics of a mixer, no additional signal source is added, the link loss of a passive network is calculated through the power detection of a coverage unit, and then the gain adjustment of the coverage unit is realized through automatically adjusting an adjustable attenuator of the coverage unit.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a passive network loss calibration method of the 5G frequency conversion system of the present invention.
Fig. 2 is a schematic diagram of an access unit according to the invention.
Fig. 3 is a schematic diagram of a cover unit in the present invention.
Fig. 4 is a schematic diagram of the local oscillation change of the access unit during calibration according to the present invention.
Fig. 5 is a schematic diagram of a 5G frequency conversion system according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
Referring to fig. 1-5, the present embodiment discloses a passive network loss calibration method of a 5G frequency conversion system, where the 5G frequency conversion system includes an access unit and a plurality of coverage units connected with the access unit through a passive distribution network, and the passive network loss calibration method includes the following steps:
step S1, any input signal connection of the access unit is disconnected, namely the access unit is not connected with any input signal, the local oscillation frequency of the access unit is configured to be F2 center frequency, and the F2 center frequency leaks to a downlink path after passing through a mixer of the access unit and enters a passive distribution network after being amplified by a downlink intermediate frequency amplifier of the access unit.
Step S2, the power detector of the access unit obtains a detection power value P1, the signal entering the coverage unit from the passive distribution network is mixed by the mixer of the coverage unit to obtain a signal F1, and then the signal F1 is subjected to the power detector of the coverage unit to obtain a detection power value P2.
And step S3, the access unit transmits the detection power value P1 to all the coverage units through the monitoring links, and the MCU of the coverage units calculates the total gain G1=P2-P1 of the passive network insertion loss and the coverage unit gain.
And S4, comparing the MCU of the coverage unit with the total gain G1 through a preset gain G0.
And S5, when the preset gain G0 is not equal to the total gain G1 (G1 > G0 under normal conditions), automatically adjusting the attenuation value of the adjustable attenuator of the covering unit (the detection power value P2 obtained by the power detector is gradually reduced, and the total gain G1 is gradually reduced to be close to the preset gain G0) until the preset gain G0 is equal to the total gain G1, stopping setting the adjustable attenuator, and thus completing the passive network loss calibration. The system reaches the ideal transmitting and receiving state.
In this embodiment, F1 is the received frequency, F2 is the transmission frequency after frequency conversion, F3 is the local oscillator signal frequency, and F1 is mixed with F3 to obtain F2, where the relationship is F1-f3=f2.
In this embodiment, it is preferable that F1 is 3400-3600MHz, F2 is 600-800MHz, F3 is 2800MHz, and F2 center frequency is 700MHz.
The invention realizes the emission of the reference signal and calculates the link loss of the passive network through the power detection of the coverage unit by adopting the existing circuit architecture of the access unit and changing the local oscillation frequency of the access unit and the local oscillation leakage characteristic of the mixer without adding additional signal sources, and then realizes the gain adjustment of the coverage unit by automatically adjusting the adjustable attenuator of the coverage unit.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, the patentees may make various modifications or alterations within the scope of the appended claims, and are intended to be within the scope of the invention as described in the claims.
Claims (2)
1. The passive network loss calibration method of the 5G frequency conversion system comprises an access unit and a plurality of coverage units connected with the access unit through a passive distribution network, and is characterized by comprising the following steps of:
s1, disconnecting any input signal connection of an access unit, configuring the local oscillation frequency of the access unit as F2 center frequency, and enabling the F2 center frequency to leak to a downlink passage after passing through a mixer of the access unit and enter a passive distribution network after being amplified by a downlink intermediate frequency amplifier of the access unit;
s2, a power detector of the access unit obtains a detection power value P1, a signal entering the coverage unit through the passive distribution network is mixed by a mixer of the coverage unit to obtain a signal F1, and the signal F1 is further processed by the power detector of the coverage unit to obtain a detection power value P2;
s3, the access unit transmits the detection power value P1 to all coverage units through a monitoring link, and the coverage units calculate to obtain the total gain G1=P2-P1 of the passive network insertion loss and the coverage unit gain;
s4, the coverage unit compares the preset gain G0 with the total gain G1;
and S5, when the preset gain G0 is not equal to the total gain G1, automatically adjusting the attenuation value of the adjustable attenuator of the covering unit until the preset gain G0 is equal to the total gain G1, and completing the passive network loss calibration.
2. The method for calibrating the passive network loss of the 5G frequency conversion system according to claim 1, wherein the frequency of the signal F1 is 3400-3600MHz, and the center frequency of the signal F2 is 700MHz.
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