CN113411871B - Energy-saving control method based on CPRI protocol and base station system - Google Patents
Energy-saving control method based on CPRI protocol and base station system Download PDFInfo
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- CN113411871B CN113411871B CN202110661939.2A CN202110661939A CN113411871B CN 113411871 B CN113411871 B CN 113411871B CN 202110661939 A CN202110661939 A CN 202110661939A CN 113411871 B CN113411871 B CN 113411871B
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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
- H04W52/02—Power saving arrangements
- H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
- H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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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 relates to an energy-saving control method and a base station system based on a CPRI protocol, the system comprises a BU and a far-end RU connected with a baseband unit, the baseband unit receives data at a core network side, configures a relevant control signal in a time slot without effective data, and transmits the configured data carrying the relevant control signal to the far-end RU; the remote RU turns off the operation of a part of modules (such as a radio frequency power amplifier module) according to the off control signal and the preset off time, and suspends the transmission of the radio frequency signal of the time slot data currently configured with the relevant control signal. The invention configures the control signal in the control word of available basic frame to make the remote RU realize the time slot stage turn-off of the radio frequency power amplifier module and transmit the control word together with the IQ data. Under the condition of not influencing system performance and user perception, the power consumption of the system can be effectively reduced, and the energy utilization efficiency is improved.
Description
[ technical field ] A
The invention relates to the technical field of mobile communication, in particular to an energy-saving control method based on a CPRI protocol and a base station system.
[ background ] A method for producing a semiconductor device
The problem of energy consumption of base stations in the communication industry has been long, the requirement of data flow in the 5G era is continuously and dramatically increased, the network load is greatly increased, and the problems in the aspects of power consumption of the base stations, equipment heat dissipation, energy-saving management and the like need to be solved urgently. The contradiction between energy saving and emission reduction lies in ensuring the service experience of mobile users and reducing the energy consumption of the system. The traditional electricity-saving method adopts the background statistical data of a base station to find out the user number, the flow and the time law. These energy saving methods are relatively extensive and are not easy to give consideration to both user perception and energy saving.
Base station systems are generally divided into Baseband Units (BU) and remote Radio Units (RU). The remote RU is the network element which consumes the most energy of the base station system, so that the power consumption of the remote RU is reduced, the power consumption of the whole base station system is reduced more easily, and the aims of energy conservation and emission reduction are achieved.
Therefore, it is desirable to provide an energy saving control method and a base station system that can reduce the energy consumption of the base station system.
[ summary of the invention ]
The technical problem to be solved by the invention is to provide an energy-saving control method based on a CPRI protocol and a base station system, which can reduce the energy consumption of the base station system.
In order to solve the above technical problem, the present invention provides an energy saving control method based on CPRI protocol, including the steps of:
s1, a baseband unit receives data, judges whether the current data has effective data in each time slot, and configures a closing control signal in a control word of an Mth basic frame in the time slot without the effective data; the Mth basic frame belongs to an available basic frame of the current time slot, and M is a natural number from 0;
s2, the baseband unit transmits the data configured with the on control signal and/or the off control signal to a far-end radio frequency unit;
s3, the remote radio frequency unit receives the data of the configured close control signal; and according to the turn-off control signal and preset turn-off time, suspending the sending of the radio frequency signals of more than M basic frames of the time slot data of the currently configured related control signal, wherein the radio frequency signals of the first M basic frames and other time slot data are continuously sent by default, and the preset turn-off time is less than or equal to the total time length of a single time slot minus the time length of the M basic frames. Further, the step S2 may be replaced by the following step S4:
and S4, the baseband unit delays the data of the configured close control signal by M basic frames and then transmits the data to the remote radio frequency unit.
Further, the preset turn-off time is preset by the baseband unit and then sent to the remote rf unit, or the preset turn-off time is calculated by the remote rf unit according to the position of the basic frame in which the turn-off control signal is located in the current timeslot.
Further, in step S1, the baseband unit configures any one or more control bits in the control word as the off control signal.
In order to solve the above technical problem, the present invention further provides a baseband unit, which includes a data transmission module, a control word configuration module and a sending module;
the data transmission module is used for receiving data;
the control word configuration module is used for judging whether the current data has effective data in each time slot or not and configuring a closing control signal in the control word of the Mth basic frame in the time slot without the effective data; the Mth basic frame belongs to an available basic frame of the current time slot, and M is a natural number from 0;
the sending module is used for transmitting the data of the configured close control signal to a remote radio frequency unit.
Further, the sending module is further configured to delay the data of the configured off control signal by M basic frames and transmit the delayed data to the remote radio unit.
Further, the control word configuration module is further configured to set a turn-off time; the sending module is further configured to send the turn-off time to the remote radio unit.
In order to solve the above technical problem, the present invention further provides a remote radio unit, which is characterized in that: the system comprises a data processing module and a radio frequency power amplifier module;
the data processing module is used for receiving the data of the configured close control signal sent by the baseband unit, converting the data into a radio frequency signal and sending the radio frequency signal to the radio frequency power amplifier module, and extracting and sending the close control signal to the radio frequency power amplifier module so as to control the work of the radio frequency power amplifier module;
the radio frequency power amplification module receives the turn-off control signal, and suspends the sending of the radio frequency signals of more than Mth basic frame of the time slot data of the current configuration related control signal within the preset turn-off time, the radio frequency signals of the first M basic frames and other time slot data are continuously sent by default, and the preset turn-off time is less than or equal to the total time length of a single time slot minus the time length of the M basic frames; m is a natural number starting from 0.
Further, the data processing module is further configured to receive a preset turn-off time sent by the baseband unit; the data processing module comprises a signal extraction module and a data conversion module;
the signal extraction module is used for extracting the closing control signal and the preset closing time after receiving the data of the configured closing control signal and the preset closing time, and sending the closing control signal and the preset closing time to the radio frequency power amplification module in real time;
the data conversion module is used for converting the data of the configured shutdown control signal into a radio frequency signal and sending the radio frequency signal to the radio frequency power amplification module in real time;
and the radio frequency power amplifier module is used for receiving the turn-off control signal and suspending sending the radio frequency signal within the preset turn-off time.
In order to solve the above technical problem, the present invention further provides a base station system based on the CPRI protocol, which is characterized by comprising the above baseband unit, and the above remote radio frequency unit connected to the baseband unit.
Compared with the prior art, the invention has the following beneficial effects: the invention configures the control signal in the control word of available basic frame to make the remote RU realize the time slot stage turn-off of the radio frequency power amplifier module and transmit the control word together with the IQ data. Under the condition of not influencing system performance and user perception, the power consumption of the system can be effectively reduced, and the energy utilization efficiency is improved.
[ description of the drawings ]
Fig. 1 is a diagram of steps of a CPRI protocol-based energy saving control method according to an embodiment of the present invention;
fig. 2 is a system structure diagram of a base station based on the CPRI protocol according to an embodiment of the present invention;
FIG. 3 is a block diagram of a basic frame of an embodiment of the present invention;
FIG. 4 is a control word structure diagram of an embodiment of the present invention;
FIG. 5 is a table of the sequence numbers of the timeslots, superframes, and basic frames according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a slot level control signal according to an embodiment of the present invention;
fig. 7 is a schematic diagram of data transmission of a BU and a remote RU delayed by 3 basic frames according to an embodiment of the present invention.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Referring to fig. 1, an energy saving control method based on a CPRI protocol provided in an embodiment of the present invention includes the following steps:
s1, a baseband unit receives data, judges whether the current data has effective data in each time slot, and configures a closing control signal in a control word of an Mth basic frame in the time slot without the effective data; the Mth basic frame belongs to an available basic frame of the current time slot, and M is a natural number from 0;
s2, the baseband unit transmits the data configured with the close control signal to a remote radio frequency unit;
s3, the remote radio frequency unit receives the data of the configured close control signal; and according to the off control signal and preset off time, suspending the sending of the radio frequency signals of more than M basic frames of the time slot data of the currently configured related control signal, and continuing the sending of the radio frequency signals of the first M basic frames and other time slot data by default, wherein the preset off time is less than or equal to the sum of the time length of a single time slot minus the time length of the M basic frames.
Specifically, the BU and the remote RU are transmitted by using an optical fiber, and transmit data signals based on a Common Public Radio Interface (CPRI) protocol or an enhanced-CPRI (enhanced-CPRI, eccri) protocol, where each basic frame includes an in-phase Quadrature (IQ) data field and control field data. When the user data packet arrives at random, the BU is transmitted to the remote RU through the CPRI interface, and the remote RU transmits the data to the user terminal equipment in a wireless mode.
According to the provisions of the CPRI protocol or the eccri protocol, the BU transmits data in units of 10ms, and each 10ms contains 150 superframes, each superframe contains 256 basic frames, and each basic frame is 260.42ns. As shown in fig. 3 and 4, each basic frame includes 1 control word and 60 IQ data, both the control word and the IQ data are 16bytes, each control word includes 16 control bits, and from # z.x.0 to # z.x.15, the BU uses any one or more of the 16 control bits to configure a control signal, i.e., an on control signal or an off control signal, the on control signal is used to control the radio frequency power amplifier module of the remote RU to keep working and can continue to transmit the radio frequency signal, and the off control signal is used to control the radio frequency power amplifier module of the remote RU to pause working and interrupt transmission of the radio frequency signal. The radio frequency power amplifier module is the most power consuming module in the far-end RU, and controls the radio frequency power amplifier module to pause when no effective data exists, so that the power consumption of a system can be saved to the maximum extent. The BU transmits the control word and the IQ data to the remote RU together, and the remote RU obtains the data and the control signal at the same time, so that the real-time control of the radio frequency power amplifier is realized, the time slot with the data is opened, and the user perception is guaranteed; and the time slot without data is closed, so that the energy is saved and the aim of saving energy is fulfilled. Of course, those skilled in the art may also set the control signal to be used for controlling the operation of other modules, and the purpose of sending the rf signal containing valid data and not sending the rf signal without valid data is also achieved.
In the embodiment of the present invention, the BU configures only the off control signal in the control word and does not configure the on control signal. And, the remote RU defaults to always transmit the radio frequency signal, and suspends the transmission only after receiving the off control signal.
The remote RU transmits data to the user terminal equipment using the 3GPP (Third Generation Partnership Project) protocol. According to the specification of the 5G wireless 3GPP protocol, 1 radio frame is included in each 10ms, each radio frame includes 10 subframes, and each subframe has 2 slots, that is, each slot is 0.5ms.
That is, every 10ms of data includes 150 superframes, which corresponds to 20 time slots, and each time slot includes 7.5 superframes, i.e., 7 superframes +128 basic frames.
In order to more accurately judge whether the current 10ms data contains real effective data, the embodiment of the invention judges one by taking the time slot as a unit, whether effective data exists in each time slot in 20 time slots of the current data, if not, an off control signal is configured in a control word of the Mth basic frame of the time slot, and if so, no processing is carried out. Wherein, the Mth basic frame is an available basic frame. The available basic frame refers to a basic frame whose control word can be used to configure an arbitrary signal according to the specification of the CPRI/eccri protocol. According to the current CPRI/eccri protocol, only basic frames No. 3, 8-19, 67, 72-83, 131, 136-147, 195, 200-211 in basic frames No. 0-255 of a superframe are available basic frames. Therefore, in a superframe, the 1 st available basic frame is the basic frame No. 3, the 2 nd available basic frame is the basic frame No. 8, the 3 rd available basic frame is the basic frame No. 9, and the last available basic frame is the basic frame No. 211. In a time slot, the first available basic frame is the first available basic frame of the first superframe, the last available basic frame is the last available basic frame of the last superframe, and since each time slot contains 7.5 superframes, a configuration control signal can be selected from the available basic frames of the 1 st to 7.5 th superframes.
In order for the remote RU to know as early as possible whether or not to send data, the configuration rule should be set to configure the control signal in the 1 st available basic frame of the current slot. There are 7.5 superframes per time slot, so the first half and the second half of a partial superframe are within two time slots, respectively. Therefore, for such a superframe, the BU configures the control signal in the first available basic frame in the latter half segment thereof, that is, the control signal is configured in the first available basic frame of basic frames No. 128 to 255, that is, basic frame No. 131.
Fig. 5 shows a table of sequence numbers of the time slots, the superframes, and the basic frames according to the embodiment of the present invention. The 1 st available basic frame of the 0 th time slot is the 3 rd basic frame of the 0 th superframe. Since each slot contains 7.5 superframes, the 1 st available basic frame of slot No. 1 is the 131 st basic frame of superframe No. 7; the 1 st available basic frame of the 2 nd time slot is the 3 rd basic frame of the 15 th superframe, and so on, and the 1 st available basic frame of the 19 th time slot is the 131 st basic frame of the 142 th superframe.
Of course, those skilled in the art can configure the control signal in any of the 2 nd, 3 rd or other available basic frames of the current timeslot according to practical situations without affecting the implementation of the present invention.
After the BU receives 10ms data, starting from the time slot No. 0, it traverses whether the IQ data segment of each basic frame in each time slot contains valid data, and configures an off control signal 0 if no valid data exists in all basic frames. And after the 19 th time slot is configured, the configuration of the next 10ms data is started.
In fig. 6, valid data exists in the slot 0, and no configuration is made; no effective data exists in the No. 1, no. 2 and No. 3 time slots, and the control word of the 1 st available basic frame of the No. 1, no. 2 and No. 3 time slots is configured as an off control signal 0; no. 4 time slot has effective data and no configuration \8230, no. 8230, and up to No. 19 time slot. Of course, those skilled in the art can configure the off control signal to be 1, 11, etc., and the specific value can be set arbitrarily without affecting the implementation of the present invention.
Ideally, the 1 st available basic frame of the current timeslot should be the 1 st basic frame of the 1 st superframe, so that the remote RU can control the rf signal of the data of the current timeslot to stop transmitting at the start time of each timeslot and generate no data error. However, according to the specifications of the CPRI protocol and the 3GPP protocol, the starting basic frame of each timeslot is not an available basic frame, so when the BU configures a control signal in the control word of the mth (when M is greater than 0) basic frame of each timeslot, if the remote RU turns off the user data transmission function according to the total duration of one timeslot, the first M basic frames of a part of timeslots will be erroneously turned off to generate data errors.
Therefore, in the embodiment of the present invention, a turn-off time is set, and the time for turning off the user data transmission function by the remote RU is controlled within the total duration of a single timeslot minus the duration of M basic frames, for example, if the turn-off control signal is set in the 3 rd basic frame, the turn-off time is less than or equal to 0.5 ms-260.42 × 3=0.499ms. And setting an off control signal in the 67 th basic frame, wherein the off time is less than or equal to 0.5 ms-260.42 multiplied by 67=0.482ms. The turn-off time may be preset by the baseband unit and then sent to the remote RU, or calculated by the remote RU according to the position of the current timeslot of the basic frame in which the turn-off control signal is located.
When the BU configures a control signal in the control word of the mth (when M is greater than 0) basic frame of each timeslot, the remote RU will also delay the M basic frames to acquire the control signal, thereby generating delays of the M basic frames.
Therefore, in another embodiment of the present invention, in order to enable the remote RU to obtain a control signal at the beginning basic frame of each slot, the turn-on and turn-off of the user data transmission function is controlled in time. The BU transmission module delays M basic frames when transmitting data to the remote RU. Specifically, the BU delays data of each time slot configured with the control word by M basic frames, and sends the delayed data to the remote RU.
Thus, the data received by the remote RU is the data transmitted after delaying the BU by M basic frames, i.e. the starting basic frame of the current time slot received by the remote RU is the mth basic frame of the current time slot in which the off control signal is configured in the BU. Therefore, the remote RU can obtain the control signal at the start time of each timeslot, thereby ensuring that the radio frequency power amplifier module is turned off at the first time.
Since the M basic frames are delayed from being transmitted, the first M basic frames of the current time slot are transmitted to the remote RU as the last M basic frames of the previous time slot. When the system just starts to work, the first M basic frames of the initial time slot may be set to default transmission, and those skilled in the art may also perform other settings according to the actual situation.
Specifically, as shown in fig. 7, a schematic diagram of data transmission of a BU and a remote RU delayed by 3 basic frames according to an embodiment of the present invention is shown.
In this embodiment, the BU uses the 3 rd basic frame of each slot as a configuration control signal, and transmits data to the remote RU after delaying 3 basic frames.
Therefore, the basic frame received by the remote RU is delayed by 3 basic frames from the basic frame configured by the BU end. Specifically, the basic frame No. 0 of the first superframe of the remote RU time slot n 'is actually the basic frame No. 3 of the first superframe of the BU end time slot n, and the last 3 basic frames of the last superframe of the time slot n' are actually the first 3 basic frames of the first superframe of the time slot n + 1. The basic frame No. 128 of the first superframe of slot n '+1, actually the basic frame No. 131 of the first superframe of slot n +1, the last 3 basic frames of the last superframe of slot n' +1, and actually the first 3 basic frames of the first superframe of slot n + 2. And so on.
The remote RU does not transmit the rf signal of data in the time 0.499ms from the basic frame No. 128 of the slot n '+1 according to the off control signal 0 configured in the basic frame No. 128 of the first superframe of the slot n' +1, and continues to transmit the rf signals of other data. Therefore, the remote RU can switch off the user data sending function in the time without valid data, so that the radio frequency power amplifier module works when needed and does not work when not needed, and the system power consumption of the remote RU is effectively reduced.
In the embodiment of the present invention, the remote RU converts only the IQ data of the basic frame into the rf signal, and the control field is not converted into the rf signal.
Fig. 2 is a diagram of a base station system structure based on the CPRI protocol according to an embodiment of the present invention.
The base station system based on the CPRI protocol of the embodiment of the invention comprises a BU and a remote RU.
The BU comprises a data transmission module, a control word configuration module and a sending module;
the data transmission module is used for receiving data.
The control word configuration module is used for judging whether the current data has effective data in each time slot and configuring a closing control signal in the control word of the Mth basic frame in the time slot without the effective data; the mth basic frame belongs to an available basic frame of the current time slot, and M is a natural number starting from 0.
The sending module is configured to transmit data of the currently configured control signal to the remote RU.
Specifically, the data transmission module receives data from the core network side and then transmits the data to the control word configuration module, the control word configuration module traverses each time slot and configures a relevant control signal, and then transmits the data to the transmission module, and the transmission module transmits the configured data carrying the relevant control signal to the remote RU through the optical fiber.
The remote RU comprises a data processing module and a radio frequency power amplifier module. The radio frequency power amplifier module only passively receives signals, belongs to a controlled party, and controls the initiative of when data is sent and when data is not sent on the data processing module. After receiving the data sent by the BU, the data processing module extracts the control signal of each slot in units of slots, and converts IQ data in each symbol into a radio frequency signal in units of slots.
Specifically, the data processing module is configured to receive data of the configured close control signal sent by the baseband unit, convert the data into a radio frequency signal, send the radio frequency signal to the radio frequency power amplifier module, and extract and send the close control signal to the radio frequency power amplifier module to control the radio frequency power amplifier module to operate.
And the radio frequency power amplification module receives the off control signal, and suspends transmitting the radio frequency signals of more than Mth basic frame of the time slot data currently configured with the related control signal within the preset off time, and the radio frequency signals of the first M basic frames and other time slot data continue to be transmitted by default.
In order to facilitate the remote RU to turn off the user data transmission function within the preset turn-off time, in this embodiment, the control word configuration module is further configured to set the turn-off time, and the transmission module transmits the turn-off time to the remote RU. The off time is less than or equal to the total duration of a single timeslot minus the duration of M basic frames.
The data processing module of the remote RU may be composed of a processor chip with a powerful function, or may be composed of a group of FPGA arrays and a data conversion module, or may be composed of a plurality of other types of modules, and those skilled in the art may reasonably design the data processing module according to actual situations.
The preset turn-off time can also be calculated by the data processing module according to the position of the basic frame where the turn-off control signal is located in the current time slot. Specifically, if the current shutdown control signal is configured in the 3 rd basic frame of the current timeslot, the data processing module may obtain, according to the calculation rule, that the shutdown time is less than or equal to 0.499ms. The calculation rule is that the turn-off time is less than or equal to the total time length of a single time slot minus the time lengths of M basic frames.
In order for the remote RU to know the control signal as early as possible to accurately control the transmission and non-transmission of data, the BU should configure the control signal in the initial basic frame of each slot. However, according to the CPRI protocol and the 3GPP protocol, the starting basic frame of each timeslot is not an available basic frame, so that the BU configures a control signal in the control word of the mth basic frame of each timeslot, and when M is greater than 0, the remote RU is delayed by M basic frames to acquire the control signal, resulting in a delay of M basic frames.
Therefore, in another embodiment of the present invention, in order to enable the remote RU to obtain a control signal at the beginning basic frame of each slot, the turn-on and turn-off of the user data transmission function is controlled in time. The BU transmission module delays M basic frames when transmitting data to the remote RU. Specifically, the sending module delays each timeslot data configured with the control word by M basic frames, and sends the delayed timeslot data to the remote RU.
Thus, the data received by the remote RU data processing module is the data that is transmitted after the transmitting module delays M basic frames, that is, the starting basic frame of the current time slot received by the data processing module is the mth basic frame of the current time slot transmitted by the BU. Therefore, the remote RU can obtain the control signal at the start time of each timeslot, thereby ensuring that the rf power amplifier module is turned off or on at the first time.
Thus, the data processing module can be composed of simple modules without a complicated design. In this embodiment, the data processing module includes a signal extraction module and a data conversion module.
And the signal extraction module is used for extracting the closing control signal and the preset closing time after receiving the data of the configured closing control signal and the preset closing time, and sending the closing control signal and the preset closing time to the radio frequency power amplification module in real time.
And the data conversion module is used for converting the data configured with the off control signal into a radio frequency signal and transmitting the radio frequency signal to the radio frequency power amplifier module in real time.
And the radio frequency power amplifier module receives the off control signal and suspends sending the radio frequency signal within preset off time.
Specifically, in the embodiment of the present invention, the data conversion module only converts the IQ data of the basic frame into the radio frequency signal and sends the radio frequency signal to the radio frequency power amplifier module, and the control word is not converted into the radio frequency signal.
Referring to fig. 7, a schematic diagram of data transmission of BU and remote RU delayed by 3 basic frames according to an embodiment of the present invention is shown.
In this embodiment, the BU uses the 3 rd basic frame of each slot as a configuration control signal, and transmits data to the remote RU after delaying 3 basic frames. Therefore, the basic frame received by the remote RU is delayed by 3 basic frames from the basic frame configured by the BU end. Specifically, the basic frame No. 0 of the first superframe of the remote RU time slot n 'is actually the basic frame No. 3 of the first superframe of the BU end time slot n, and the last 3 basic frames of the last superframe of the time slot n' are actually the first 3 basic frames of the first superframe of the time slot n + 1. The basic frame No. 128 of the first superframe of slot n '+1, actually the basic frame No. 131 of the first superframe of slot n +1, the last 3 basic frames of the last superframe of slot n' +1, and actually the first 3 basic frames of the first superframe of slot n + 2. And so on.
The remote RU does not transmit the rf signal of data within 0.499ms from the 128 th basic frame of the slot n '+1 according to the off control signal 0 configured in the 128 th basic frame of the first superframe of the slot n' +1, and continues to transmit the rf signals of other data. Therefore, the remote RU can turn off the user data transmission function in the time without valid data, so that the radio frequency power amplifier module works when needed and does not work when not needed, and the system power consumption of the remote RU is effectively reduced.
In summary, the present invention configures a control signal in the control word of the available basic frame, so that the remote RU implements the timeslot level shutdown of the rf power amplifier module, and transmits the control word along with the IQ data. Under the condition of not influencing system performance and user perception, the power consumption of the system can be effectively reduced, and the energy utilization efficiency is improved.
The above examples merely represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make several variations and modifications, such as combinations of different features in the various embodiments, without departing from the inventive concept, which fall within the scope of the present invention.
Claims (10)
1. A energy-saving control method based on CPRI protocol is characterized in that: the method comprises the following steps:
s1, a baseband unit receives data, judges whether the current data has effective data in each time slot, and configures a closing control signal in a control word of an Mth basic frame in the time slot without the effective data; the Mth basic frame belongs to an available basic frame of the current time slot, and M is a natural number from 0;
s2, the baseband unit transmits the data configured with the close control signal to a remote radio frequency unit;
s3, the remote radio frequency unit receives the data of the configured close control signal; and according to the off control signal and preset off time, suspending the sending of the radio frequency signals of more than M basic frames of the time slot data of the currently configured related control signal, and continuing the sending of the radio frequency signals of the first M basic frames and other time slot data by default, wherein the preset off time is less than or equal to the sum of the time length of a single time slot minus the time length of the M basic frames.
2. A CPRI protocol-based power saving control method as claimed in claim 1, wherein: said step S2 may be replaced by the following step S4:
and S4, the baseband unit delays the data of the configured close control signal by M basic frames and then transmits the data to the remote radio frequency unit.
3. A CPRI protocol-based power saving control method as claimed in claim 1, wherein: the preset turn-off time is preset by the baseband unit and then sent to the far-end radio frequency unit, or the preset turn-off time is calculated by the far-end radio frequency unit according to the position of the basic frame where the turn-off control signal is located in the current time slot.
4. A CPRI protocol-based power saving control method as claimed in claim 1, wherein: in step S1, the baseband unit configures any one or more control bits in the control word as the off control signal.
5. A baseband unit, characterized by: the device comprises a data transmission module, a control word configuration module and a sending module;
the data transmission module is used for receiving data;
the control word configuration module is used for judging whether the current data has effective data in each time slot or not and configuring a closing control signal in the control word of the Mth basic frame in the time slot without the effective data; the Mth basic frame belongs to an available basic frame of the current time slot, and M is a natural number from 0;
the sending module is used for transmitting the data of the configured closing control signal to a far-end radio frequency unit, and the far-end radio frequency unit receives the data of the configured closing control signal; and according to the turn-off control signal and preset turn-off time, suspending the sending of the radio frequency signals of more than M basic frames of the time slot data of the currently configured related control signal, wherein the radio frequency signals of the first M basic frames and other time slot data are continuously sent by default, and the preset turn-off time is less than or equal to the total time length of a single time slot minus the time length of the M basic frames.
6. The baseband unit of claim 5, wherein: the sending module is further configured to delay the data of the configured off control signal by M basic frames and transmit the delayed data to the remote radio unit.
7. A baseband unit according to claim 5 or 6, characterized in that: the control word configuration module is also used for setting the turn-off time; the sending module is further configured to send the turn-off time to the remote radio unit.
8. A remote radio unit, comprising: the system comprises a data processing module and a radio frequency power amplifier module;
the data processing module is used for receiving data of configured close control signals sent by the baseband unit, converting the data into radio frequency signals and sending the radio frequency signals to the radio frequency power amplifier module, and extracting and sending the close control signals to the radio frequency power amplifier module so as to control the work of the radio frequency power amplifier module;
the radio frequency power amplification module receives the off control signal, and suspends the transmission of the radio frequency signals of more than Mth basic frame of the time slot data of the currently configured related control signal within the preset off time, the radio frequency signals of the first M basic frames and other time slot data are continuously transmitted by default, and the preset off time is less than or equal to the total time length of a single time slot minus the time length of the M basic frames; m is a natural number starting from 0.
9. The remote radio unit of claim 8, wherein: the data processing module is further configured to receive a preset turn-off time sent by the baseband unit; the data processing module comprises a signal extraction module and a data conversion module;
the signal extraction module is used for extracting the closing control signal and the preset closing time after receiving the data of the configured closing control signal and the preset closing time, and sending the closing control signal and the preset closing time to the radio frequency power amplification module in real time;
the data conversion module is used for converting the data of the configured shutdown control signal into a radio frequency signal and sending the radio frequency signal to the radio frequency power amplification module in real time;
and the radio frequency power amplifier module is used for receiving the off control signal and suspending sending the radio frequency signal within the preset off time.
10. A base station system based on CPRI protocol, comprising a baseband unit according to claim 5 or 6 or 7, and a remote radio unit according to claim 8 or 9 connected to said baseband unit.
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