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CN112437482B - TDD communication equipment, TDD communication system and power adjustment method - Google Patents

TDD communication equipment, TDD communication system and power adjustment method Download PDF

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Publication number
CN112437482B
CN112437482B CN201910788812.XA CN201910788812A CN112437482B CN 112437482 B CN112437482 B CN 112437482B CN 201910788812 A CN201910788812 A CN 201910788812A CN 112437482 B CN112437482 B CN 112437482B
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China
Prior art keywords
tdd
signal
attenuation
repeater
downlink
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CN201910788812.XA
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CN112437482A (en
Inventor
张俪
王大鹏
孙蕾
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/143—Downlink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • 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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radio Relay Systems (AREA)

Abstract

The embodiment of the invention provides a TDD communication device, a TDD communication system and a power adjusting method, wherein the TDD communication device comprises: a transceiver circuit for transmitting a first signal to the TDD repeater and receiving a second signal from the TDD repeater; the transceiving circuit is directly connected with the TDD repeater on the downlink, or a first attenuation module is arranged on the downlink between the transceiving circuit and the TDD repeater. In the embodiment of the invention, the TDD communication equipment is directly connected with the TDD repeater, the TDD communication equipment adjusts the downlink power, and the downlink passive attenuation network is removed, so that the energy waste is avoided, and the cost of the attenuation network is saved; or the first attenuation module is arranged on the downlink of the TDD communication equipment and the TDD repeater, the TDD communication equipment and the TDD repeater jointly adjust the downlink power, and the energy waste is reduced, the attenuation network is simplified, the cost is saved, and the construction complexity is reduced by reducing the transmission power of the TDD communication equipment.

Description

TDD communication equipment, TDD communication system and power adjustment method
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a TDD communication device, a TDD communication system and a power adjustment method.
Background
In the current time division duplex (Time Division Duplexing, TDD) active indoor distribution system, because the downlink input power of the active indoor distribution devices such as the digital optical fiber repeater, the optical fiber distribution system and the like is limited to a certain extent, the downlink input power is generally far lower than the downlink transmitting power of the communication device (also called as a main device), and a passive attenuation network is usually required to be added between the main device and the active time division device, wherein the most typical attenuation network is composed of a coupler or an attenuator, and the specific device connection is shown in fig. 1a and 1 b.
The existing scheme has the following defects:
(1) Energy waste;
the active indoor subsystem needing radio frequency feed-in such as the digital optical fiber repeater, the optical fiber distribution system and the like adopts a macro base station or a micro base station as a signal source, and because the downlink input power of the active indoor subsystem is limited, an attenuation network needs to be accessed, downlink emission signals of a large number of signal sources need to be attenuated, and a large amount of energy waste is caused.
(2) The cost is high, and the construction complexity is high;
the need to use a large number of passive devices is disadvantageous to cost optimization, and has the advantages of more modules, complex construction and higher requirements on professional ability of construction and maintenance staff.
Disclosure of Invention
The embodiment of the invention provides a TDD communication device, a TDD communication system and a power adjustment method, which solve the problems of energy waste, high cost and high construction complexity of the existing TDD active indoor scheme.
According to a first aspect of an embodiment of the present invention, there is provided a time division duplex, TDD, communication device, comprising:
a transceiver circuit for transmitting a first signal to a TDD repeater and receiving a second signal from the TDD repeater;
the receiving and transmitting circuit is directly connected with the TDD repeater on a downlink, or a first attenuation module is arranged on the downlink between the receiving and transmitting circuit and the TDD repeater;
the first attenuation module is configured to reduce power of a first signal after the transceiver circuit sends the first signal to the TDD repeater.
Optionally, the TDD communications device further comprises:
and the power reduction module is used for reducing the power of the first signal before the receiving and transmitting circuit transmits the first signal to the TDD repeater.
Optionally, in a case where the transceiving circuit is directly connected to the TDD repeater on a downlink, the TDD communication device further includes:
the first adjusting module is used for adjusting a preset algorithm related to the signal quality of the first signal according to the target power value;
the second adjusting module is used for adjusting the analog link gain of the first signal according to the target power value;
and the target power value is a power input threshold value of the TDD repeater.
Optionally, the TDD communications device further comprises:
and a third adjusting module, configured to adjust the digital baseband link gain of the first signal when the analog link gain is insufficient to complete the target power value.
Optionally, a second attenuation module is arranged on an uplink between the transceiver circuit and the TDD repeater;
the second attenuation module is configured to attenuate a second signal before the transceiver circuit receives the second signal from the TDD repeater.
Optionally, the TDD communications device further comprises a medium radio frequency board provided with an analog-to-digital converter ADC;
the second attenuation module is arranged on the uplink of the medium radio frequency board card, and in the signal transmission direction, the second attenuation module is positioned in front of the ADC.
Optionally, the second attenuation module includes:
a first circulator, a second circulator, and an attenuation unit connected between the first circulator and the second circulator.
Optionally, in the case that the transceiving circuit is directly connected to the TDD repeater on a downlink, the attenuation unit includes: a first attenuator subunit;
the first attenuation subunit is connected to an uplink between the first circulator and the second circulator.
Optionally, in a case where a first attenuation module is provided in a downlink between the transceiving circuit and the TDD repeater, the attenuation unit includes: a second attenuator subunit and a third attenuator subunit;
the second attenuation subunit is connected to an uplink between the first circulator and the second circulator, and the third attenuation subunit is connected to a downlink between the first circulator and the second circulator.
According to a second aspect of an embodiment of the present invention, there is provided a TDD communication system including: a TDD repeater and a TDD communications device as described in the first aspect.
According to a third aspect of embodiments of the present invention, there is provided a power adjustment method applied to the TDD communication device according to the first aspect, the method including:
transmitting a first signal to a TDD repeater through a transceiving circuit, and receiving a second signal from the TDD repeater;
reducing the power of the first signal by the TDD communications device in the event that the transceiving circuitry is directly connected to the TDD repeater on a downlink;
and under the condition that a first attenuation module is arranged on a downlink between the receiving and transmitting circuit and the TDD repeater, reducing the power of the first signal through the TDD communication equipment and the first attenuation module.
Optionally, reducing, by the TDD communications device, the power of the first signal includes:
the power of the first signal is reduced by a power reduction module.
Optionally, in a case where the transceiving circuit is directly connected to the TDD repeater on a downlink, the method further comprises:
adjusting a preset algorithm related to the signal quality of the first signal according to the target power value through a first adjusting module;
adjusting the analog link gain of the first signal according to the target power value through a second adjusting module;
and the target power value is a power input threshold value of the TDD repeater.
Optionally, the method further comprises:
and when the analog link gain is insufficient to complete the target power value, adjusting the digital baseband link gain of the first signal through a third adjusting module.
Optionally, before the TDD repeater receives the second signal through the transceiver circuit, the method further comprises:
the second signal is attenuated by a second attenuation module.
In the embodiment of the invention, the TDD communication equipment is directly connected with the TDD repeater, the TDD communication equipment adjusts the downlink power, and the downlink passive attenuation network is removed, so that the energy waste is avoided, and the cost of the attenuation network is saved; or the first attenuation module is arranged on the downlink of the TDD communication equipment and the TDD repeater, the TDD communication equipment and the TDD repeater jointly adjust the downlink power, and the energy waste is reduced, the attenuation network is simplified, the cost is saved, and the construction complexity is reduced by reducing the transmission power of the TDD communication equipment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1a is a schematic diagram of a conventional TDD communication system:
FIG. 1b is a schematic diagram of a second embodiment of a conventional TDD communication system;
fig. 2a is a schematic structural diagram of a TDD communication device according to an embodiment of the present invention;
fig. 2b is a second schematic structural diagram of a TDD communication device according to an embodiment of the present invention;
fig. 3 is a third schematic structural diagram of a TDD communication device according to an embodiment of the present invention;
fig. 4a is a schematic diagram of a TDD communication device connection according to an embodiment of the present invention;
fig. 4b is a second schematic diagram of a TDD communication device according to an embodiment of the present invention;
FIG. 5a is a schematic diagram illustrating a second attenuation module set position according to an embodiment of the present invention;
FIG. 5b is a second schematic diagram illustrating a second attenuation module setting position according to an embodiment of the present invention;
FIG. 5c is a third schematic diagram illustrating a second attenuation module set position according to an embodiment of the present invention;
fig. 6a is one of application scenario diagrams of a TDD communication device according to an embodiment of the present invention;
fig. 6b is a second schematic diagram of an application scenario of a TDD communication device according to an embodiment of the present invention;
fig. 6c is a third schematic diagram of an application scenario of a TDD communication device according to an embodiment of the present invention;
FIG. 7a is a schematic diagram of a second attenuation module according to an embodiment of the present invention;
FIG. 7b is a second schematic diagram of a second attenuation module according to an embodiment of the present invention;
fig. 8 is a flow chart of a power adjustment method according to an embodiment of the present invention;
fig. 9a is a schematic diagram of an application scenario of a conventional TDD communication system;
fig. 9b is a schematic diagram of an application scenario of a TDD communication system according to an embodiment of the present invention;
fig. 9c is a second schematic diagram of an application scenario of a TDD communication system according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In embodiments of the invention, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
Referring to fig. 2a and 2b, an embodiment of the present invention provides a TDD communication apparatus 200, the TDD communication apparatus comprising:
a transceiver circuit 201 for transmitting a first signal to the TDD repeater 210 and receiving a second signal from the TDD repeater 210;
as shown in fig. 2a, the transceiver circuit 201 is directly connected to the TDD repeater 210 on the downlink; or as shown in fig. 1b, a first attenuation module 202 is arranged on the downlink between the transceiver circuit 201 and the TDD repeater 210;
the first attenuation module 202 is configured to reduce the power of the first signal after the transceiver circuit 201 transmits the first signal to the TDD repeater 210.
In the embodiment of the present invention, two improvements are provided for attenuation of the first signal sent by the TDD communication device 200 to the TDD repeater 210:
mode one: completely removing the downlink passive attenuation network;
as shown in fig. 2a, the TDD communication device 200 is directly connected to the TDD repeater 210, so that downlink energy waste can be completely avoided, uplink interference caused by an attenuation network is eliminated, and meanwhile, construction complexity can be greatly reduced by removing a downlink passive attenuation network.
It should be noted that, since the downstream passive attenuation network is completely removed, signal attenuation in the downstream direction, that is, power attenuation on the first signal, is completely performed by the TDD communication device 200, and thus, the signal attenuation capability of the TDD communication device 200 is required in this manner.
Optionally, a power reduction module is provided in the TDD communication device 200, where the power reduction module is configured to reduce the power of the first signal before the transceiver circuit sends the first signal to the TDD repeater 210.
Further, while the TDD communication apparatus 200 reduces the downlink power, the influence on the quality of the downlink signal needs to be reduced as much as possible, and thus needs to be adjusted accordingly according to the amount of downlink power reduction.
Specifically, referring to fig. 3, the TDD communication device 200 further includes:
a first adjustment module 203, configured to adjust a preset algorithm related to the signal quality of the first signal according to the target power value;
a second adjusting module 204, configured to adjust an analog link gain of the first signal according to the target power value;
in the embodiment of the present invention, the target power value is a power input threshold value of the TDD repeater 210, and the preset algorithm may be a standing wave detection algorithm, a Digital Pre-Distortion (DPD) algorithm, etc., and the embodiment of the present invention does not specifically limit the type of the preset algorithm.
When the first signal is adjusted, the analog link gain of the first signal is adjusted first, which has the advantage of not affecting the signal to noise ratio, but has a smaller adjustable range, and when the power input threshold value of the TDD repeater 210 is different from the transmission power value of the TDD communication device by a larger amount, the digital baseband link gain of the first signal needs to be adjusted additionally.
Specifically, the TDD communication apparatus 200 further includes:
the third adjusting module 205 is configured to adjust the digital baseband link gain of the first signal when the analog link gain is not sufficient to achieve the target power value.
Mode two: reducing the attenuation value of the passive attenuation network downlink;
as shown in fig. 2b, a first attenuation module 202 is disposed on the downlink between the transceiver circuit 201 and the TDD repeater 210, and the TDD communication device 200 and the first attenuation module 202 attenuate the first signal together.
Because the TDD communication device 200 shares the required attenuation value with the first attenuation module 202, the attenuation capability requirement of the TDD communication device 200 is low, and software upgrade can be performed based on the existing TDD communication device to implement the attenuation function thereof.
It should be noted that, although the power of the downlink power amplifier of the TDD communication device 200 is not reduced to the minimum value (i.e., the power threshold of the TDD repeater 210) in the above manner, the power consumption of the power amplifier of the TDD communication device 200 is greatly reduced due to the fact that the power amplifier is reduced from the rated power to a certain threshold, so that the waste of the capability can be greatly reduced.
In the embodiment of the invention, the TDD communication equipment is directly connected with the TDD repeater, the TDD communication equipment adjusts the downlink power, and the downlink passive attenuation network is removed, so that the energy waste is avoided, and the cost of the attenuation network is saved; or the first attenuation module is arranged on the downlink of the TDD communication equipment and the TDD repeater, the TDD communication equipment and the TDD repeater jointly adjust the downlink power, and the energy waste is reduced, the attenuation network is simplified, the cost is saved, and the construction complexity is reduced by reducing the transmission power of the TDD communication equipment.
Referring to fig. 4a and 4b, fig. 4a shows a specific device connection scenario when the downstream passive attenuation network is completely removed, and fig. 4b shows a specific device connection scenario when the downstream attenuation value of the passive attenuation network is reduced.
Wherein, an uplink separation attenuation network is disposed in the uplink between the TDD communication device 200 and the TDD repeater 210, which is used to ensure uplink and downlink balance, and when the downlink gain is reduced, the uplink gain is reduced, or the uplink sensitivity level is reduced, so as to prevent blocking or burning risk to the device.
Optionally, a second attenuation module is disposed on an uplink between the transceiving circuit of the TDD communication device 200 and the TDD repeater 210; the second attenuation module is configured to attenuate the second signal before the transceiver circuit receives the second signal from the TDD repeater 210.
Further, the TDD communications device 200 further includes a medium radio frequency board provided with an Analog-to-Digital Converter (ADC);
referring to fig. 5a, a second attenuation module 207 is disposed on the uplink of the mid-radio frequency board 206, and in the signal transmission direction, the second attenuation module 207 is located before the ADC 2061.
Referring to fig. 5b and 5c, in practical structure, as shown in fig. 5b, the second attenuation module may be added on the mid-radio frequency board card, that is, by means of an attenuation chip; as shown in fig. 5c, a second attenuation module may be added to the interface between the transceiver circuit and the intermediate radio frequency board card, that is, by using an external attenuation module.
Referring to fig. 6 a-6 c, there are shown embodiments of several second attenuation modules;
mode one: the original hardware design of the TDD communication equipment is utilized, and the hardware is not changed at all;
as shown in fig. 6a, in the TDD communication device/medium radio frequency board, in the case that the original attenuation margin is sufficient, an existing adjustable gain device in the original uplink may be utilized, for example: a digital variable gain amplifier (Digital Variable Gain Amplifier, DVGA) performs the attenuation function.
Mode two: improving a radio frequency board card in the TDD communication equipment;
as shown in fig. 6b, when the original attenuation margin is insufficient, the medium radio frequency board card of the TDD communication device may be modified, for example: the amplifier after the original low noise amplifier (Low Noise Amplifier, LNA) is replaced with DVGA.
Or as shown in fig. 6c, the attenuation function is selectively controlled by the switch to be turned on or off by fixing the attenuator and the switching device.
Mode three: the TDD communication equipment is not upgraded, and an attenuation module is additionally arranged;
the medium radio frequency board card is not modified, and only a fixed or adjustable attenuation module is additionally arranged between the receiving and transmitting circuit and the medium radio frequency board card, so that the attenuation requirement is met. Because the transceiver circuit of most of the TDD communication devices and the middle radio frequency board card are connected by using radio frequency cables, the attenuation function can be realized only by connecting an attenuation module in series between the connected cables.
If the attenuation module is adjustable, the attenuation module can be controlled by manual dialing or the like, or can be controlled by serial ports or the like.
Referring to fig. 7a and 7b, for different downlink power attenuation modes, the following second attenuation module 207 is provided in an embodiment of the present invention;
specifically, the second attenuation module 207 includes: a first circulator 2071, a second circulator 2072, and a damping unit connected between the first circulator 2071 and the second circulator 2072.
For the method adopting the mode of completely removing the downlink passive attenuation network:
as shown in fig. 7a, in the case where the transceiving circuit is directly connected to the TDD repeater on the downlink, the attenuation unit includes: a first attenuator subunit 2073; the first attenuator subunit 2073 is connected to the uplink between the first circulator 2071 and the second circulator 2072.
In the embodiment of the invention, the circulator is used for separating the uplink signal from the downlink signal and attenuating the uplink signal, so that the power supply can be omitted, the second attenuation module is simplified, and the cost is saved. If the uplink attenuation value needs to be adjusted, the adjustment can be realized through a dial switch, if the power supply is carried out on the attenuation unit under the condition, the attenuation unit can also be realized through a switch and a numerical control attenuator.
For the way of reducing the attenuation value of the passive attenuation network downlink:
as shown in fig. 6b, in the case where the first attenuation module is provided in the downlink between the transceiving circuit and the TDD repeater, the attenuation unit includes: a second attenuator subunit 2074 and a third attenuator subunit 2075; the second attenuator subunit 2074 is connected to the uplink between the first circulator 2071 and the second circulator 2072, and the third attenuator subunit 2074 is connected to the downlink between the first circulator 2071 and the second circulator 2072.
In the embodiment of the invention, the fixed attenuation value of the external attenuator is added into the uplink attenuation network, namely, the attenuation of a fixed value is increased on the basis of the original uplink attenuation on both the uplink and the downlink, so that the attenuation network with attenuation capability on both the uplink and the downlink is formed.
The embodiment of the invention also provides a TDD communication system, which comprises: a TDD repeater and a TDD communications device as described above.
Referring to fig. 8, an embodiment of the present invention provides a power adjustment method, where an execution body of the method is a TDD communication device as described above, and specific steps of the method are as follows:
step 801: transmitting a first signal to the TDD repeater through the transceiving circuit, and receiving a second signal from the TDD repeater, and then performing step 802 or step 803;
step 802: the method comprises the steps of reducing the power of a first signal through a TDD communication device under the condition that a receiving and transmitting circuit is directly connected with a TDD repeater on a downlink;
step 803: under the condition that a first attenuation module is arranged on a downlink between a receiving and transmitting circuit and a TDD repeater, reducing the power of a first signal through TDD communication equipment and the first attenuation module;
in the embodiment of the invention, a mode of completely removing the downlink passive attenuation network can be adopted, namely, a receiving-transmitting circuit is directly connected with the TDD repeater on a downlink, and the power of the first signal is reduced by the TDD communication equipment; the method can also adopt the method of reducing the attenuation value of the downlink of the passive attenuation network, namely, arranging a first attenuation module on the downlink between the receiving and transmitting circuit and the TDD repeater, and jointly reducing the power of the first signal by the TDD communication equipment and the first attenuation module.
Optionally, the power of the first signal is reduced by a power reduction module.
Optionally, in the case that the transceiver circuit is directly connected to the TDD repeater on the downlink, the method further comprises: adjusting a preset algorithm related to the signal quality of the first signal according to the target power value through a first adjusting module; adjusting the analog link gain of the first signal according to the target power value through a second adjusting module; the target power value is a power input threshold value of the TDD repeater.
Further, when the analog link gain is insufficient to complete the target power value, the digital baseband link gain of the first signal is adjusted by the third adjustment module. This ensures that the downlink power is reduced while reducing the impact on the downlink signal quality.
Optionally, before receiving the second signal by the transceiver circuit TDD repeater, the method further comprises: the second signal is attenuated by a second attenuation module. The specific embodiment of the second attenuation module may refer to the corresponding content in the description of the TDD communication device, which is not described herein.
In the embodiment of the invention, the TDD communication equipment is directly connected with the TDD repeater, the TDD communication equipment adjusts the downlink power, and the downlink passive attenuation network is removed, so that the energy waste is avoided, and the cost of the attenuation network is saved; or the first attenuation module is arranged on the downlink of the TDD communication equipment and the TDD repeater, the TDD communication equipment and the TDD repeater jointly adjust the downlink power, and the energy waste is reduced, the attenuation network is simplified, the cost is saved, and the construction complexity is reduced by reducing the transmission power of the TDD communication equipment.
Embodiments of the invention are described below in conjunction with specific examples:
the method for calculating the uplink attenuation comprises the following steps:
(1) The prior method comprises the following steps:
referring to fig. 9a, the downlink output power of the base station in the original method is: p (P) OUT_BTS ；
The cable attenuation between the base station and the repeater near-end machine is as follows: LOSS (Low LOSS of control) Line ；
The downlink input power of the repeater near-end machine is limited as follows: p (P) IN_RELAY ；
The method can obtain the following steps: the attenuation values of the passive attenuation network are: att=p OUT_BTS -P IN_RELAY -LOSS Line ；
At this time, we have a requirement for uplink attenuation of the base station master device: ATT (automatic Tet) RX Is 0.
(2) The downstream passive attenuation network is completely removed:
referring to fig. 9b, the attenuation value att1=0 of the passive attenuation network;
the downlink output power of the base station needs to be reduced to: p (P) OUT_BTS_1 ＝P IN_RELAY +LOSS Line ；
Compared with the original scheme, the base stationThe downlink output power reduction value is P OUT_BTS -P OUT_BTS_1 The ATT value in the original scheme is obtained.
Meanwhile, in order to ensure the balance of uplink and downlink coverage, attenuation is added to the uplink of the base station, and the attenuation value ATT is needed RX1 ＝ATT。
(3) And (3) reducing the downstream attenuation value of the passive attenuation network:
referring to fig. 9c, the attenuation values of the passive attenuation network are ATT2,0< ATT2< ATT, where the value of ATT2 can be flexibly selected according to the uplink attenuation capability margin of the master device, for example, ATT2 can be selected to be half of ATT.
The downlink output power of the base station needs to be reduced to: p (P) OUT_BTS_2 ＝P IN_RELAY +LOSS Line +ATT2。
Compared with the original scheme, the downlink output power of the base station is reduced by a value P OUT_BTS -P OUT_BTS_2 I.e. the value of ATT-ATT 2.
Meanwhile, in order to ensure the balance of uplink and downlink coverage, attenuation is added to the uplink of the base station, and the attenuation value ATT is needed RX2 ＝ATT-ATT2。
The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (13)

1. A time division duplex, TDD, communication device, comprising:
a transceiver circuit for transmitting a first signal to a TDD repeater and receiving a second signal from the TDD repeater;
the receiving and transmitting circuit is directly connected with the TDD repeater on a downlink, or a first attenuation module is arranged on the downlink between the receiving and transmitting circuit and the TDD repeater;
the first attenuation module is used for reducing the power of a first signal after the receiving and transmitting circuit transmits the first signal to the TDD repeater;
the TDD communications device further comprises:
and the power reduction module is used for reducing the power of the first signal before the receiving and transmitting circuit transmits the first signal to the TDD repeater.
2. The TDD communications device of claim 1, wherein in the case where the transceiving circuitry is directly connected to the TDD repeater on the downlink, the TDD communications device further comprises:
the first adjusting module is used for adjusting a preset algorithm related to the signal quality of the first signal according to the target power value;
the second adjusting module is used for adjusting the analog link gain of the first signal according to the target power value;
and the target power value is a power input threshold value of the TDD repeater.
3. The TDD communications device of claim 2, wherein the TDD communications device further comprises:
and a third adjusting module, configured to adjust the digital baseband link gain of the first signal when the analog link gain is insufficient to complete the target power value.
4. The TDD communication device of claim 1, wherein,
a second attenuation module is arranged on an uplink between the receiving and transmitting circuit and the TDD repeater;
the second attenuation module is configured to attenuate a second signal before the transceiver circuit receives the second signal from the TDD repeater.
5. The TDD communications device of claim 4, further comprising a medium radio frequency board provided with an analog to digital converter ADC;
the second attenuation module is arranged on the uplink of the medium radio frequency board card, and in the signal transmission direction, the second attenuation module is positioned in front of the ADC.
6. The TDD communications device of claim 4, wherein said second attenuation module comprises:
a first circulator, a second circulator, and an attenuation unit connected between the first circulator and the second circulator.
7. The TDD communication device of claim 6, wherein,
in the case where the transceiving circuit is directly connected to the TDD repeater on a downlink, the attenuation unit includes: a first attenuator subunit;
the first attenuation subunit is connected to an uplink between the first circulator and the second circulator.
8. The TDD communication device of claim 7, wherein,
in the case where a first attenuation module is provided in the downlink between the transceiving circuit and the TDD repeater, the attenuation unit includes: a second attenuator subunit and a third attenuator subunit;
the second attenuation subunit is connected to an uplink between the first circulator and the second circulator, and the third attenuation subunit is connected to a downlink between the first circulator and the second circulator.
9. A TDD communication system, the TDD communication system comprising: a TDD repeater and a TDD communications device according to any one of claims 1 to 8.
10. A power adjustment method applied to the TDD communication apparatus according to any one of claims 1 to 8, characterized in that the method comprises:
transmitting a first signal to a TDD repeater through a transceiving circuit, and receiving a second signal from the TDD repeater;
reducing the power of the first signal by the TDD communications device in the event that the transceiving circuitry is directly connected to the TDD repeater on a downlink;
reducing the power of the first signal by the TDD communications device and the first attenuation module when the first attenuation module is disposed on a downlink between the transceiver circuit and the TDD repeater;
reducing, by the TDD communications device, power of the first signal, comprising:
the power of the first signal is reduced by a power reduction module.
11. The method of claim 10, wherein in the case where the transceiving circuitry is directly connected to the TDD repeater on a downlink, the method further comprises:
adjusting a preset algorithm related to the signal quality of the first signal according to the target power value through a first adjusting module;
adjusting the analog link gain of the first signal according to the target power value through a second adjusting module;
and the target power value is a power input threshold value of the TDD repeater.
12. The method of claim 11, wherein the method further comprises:
and when the analog link gain is insufficient to complete the target power value, adjusting the digital baseband link gain of the first signal through a third adjusting module.
13. The method of claim 10, wherein prior to the receiving of the second signal by the TDD repeater via the transceiver circuit, the method further comprises:
the second signal is attenuated by a second attenuation module.
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