CN117580165B - Combined resource scheduling method for multiple repeater - Google Patents

Combined resource scheduling method for multiple repeater Download PDF

Info

Publication number
CN117580165B
CN117580165B CN202311539155.8A CN202311539155A CN117580165B CN 117580165 B CN117580165 B CN 117580165B CN 202311539155 A CN202311539155 A CN 202311539155A CN 117580165 B CN117580165 B CN 117580165B
Authority
CN
China
Prior art keywords
frequency
repeater
signal
user
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202311539155.8A
Other languages
Chinese (zh)
Other versions
CN117580165A (en
Inventor
张冰
樊文娟
刘蔚
黄明洋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Xinsheng Technology Co ltd
Original Assignee
Beijing Xinsheng Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Xinsheng Technology Co ltd filed Critical Beijing Xinsheng Technology Co ltd
Priority to CN202311539155.8A priority Critical patent/CN117580165B/en
Publication of CN117580165A publication Critical patent/CN117580165A/en
Application granted granted Critical
Publication of CN117580165B publication Critical patent/CN117580165B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15564—Relay station antennae loop interference reduction
    • H04B7/15585—Relay station antennae loop interference reduction by interference cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
    • 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

Landscapes

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

Abstract

The invention discloses a joint resource scheduling method of a plurality of repeater stations, which relates to the technical field of wireless communication and comprises the following steps: s1, a base station sends downlink signals to a user and a repeater at the frequency of f; s2, the repeater receives the downlink signal of the base station in the step S1 into the repeater by using a forward antenna, and amplifies the useful signal by using a low-noise amplifier; s3, sending the signal processed by the S2 and the channel state information from the repeater to the user to a controller, and reallocating the carrier frequency through a corresponding anti-interference joint resource scheduling algorithm; and S4, the carrier frequency in the step S3 passes through the PLL frequency synthesizer module, and the frequency dividing ratio of the programmable frequency divider is adjusted through the parameters after resource optimization. According to the invention, the PLL frequency synthesizer is integrated at the repeater, and the frequency spectrum is divided to a certain extent, so that carriers of a plurality of frequency points are obtained, and signals are modulated onto the optimal carrier frequency, so that interference among the repeater is reduced.

Description

Combined resource scheduling method for multiple repeater
Technical Field
The invention relates to the technical field of wireless communication, in particular to a joint resource scheduling method of multiple repeater stations.
Background
The repeater is a same-frequency amplifying device, which consists of an antenna, a radio frequency duplexer, a low noise amplifier, a mixer, an electrically tunable attenuator, a filter, a power amplifier and other components or modules, and the basic principle of the repeater is as follows: the downlink signal of the base station is received by a forward antenna (donor antenna) and is fed into a repeater, the useful signal is amplified by a low-noise amplifier, the noise signal in the signal is restrained, and the signal-to-noise ratio (S/N) is improved; down-converting to intermediate frequency signal, filtering by filter, intermediate frequency amplifying, up-converting to radio frequency, amplifying by power amplifier, and transmitting to mobile station by backward antenna (retransmission antenna); and meanwhile, the uplink signal of the mobile station is received by the backward antenna, and is processed by an uplink amplifying link along the opposite path: i.e., through the low noise amplifier, down converter, filter, intermediate amplifier, up converter, power amplifier, to the base station, thereby achieving two-way communication between the base station and the mobile station.
In a repeater auxiliary communication system, communication between a cell edge user with poor channel quality and a base station can be carried out by means of a repeater, when a plurality of repeaters exist in the system, the user inevitably receives interference of common-frequency signals of surrounding repeaters, and the difference of distances between a mobile terminal and the repeater can cause different received common-frequency interference degrees, especially when the user is far from the edge of the repeater, the user is interfered among serious repeaters due to the fact that the distance between the user and the repeater is closer, the throughput of the whole system is reduced, and the conventional repeater is common-frequency amplifying equipment, adopts a mode of direct receiving and direct transmitting to transmit signals, cannot well utilize time-frequency resources, and wastes radio resources to a certain extent.
Therefore, it is necessary to propose a joint resource scheduling method for multiple repeaters to solve the above problems.
Disclosure of Invention
The invention aims at: the problem of interference between multiple repeater stations is solved.
The invention adopts the following technical scheme for realizing the purposes:
a joint resource scheduling method of multiple repeater includes the following steps:
S1, a base station sends downlink signals to a user and a repeater at the frequency of f;
S2, the repeater receives the downlink signal of the base station in the step S1 into the repeater by using a forward antenna, amplifies the useful signal by using a low-noise amplifier, suppresses noise signals in the signal and improves the signal-to-noise ratio;
S3, the signal processed by the S2 and the channel state information of the repeater to the user are sent to a controller, and the carrier frequency is redistributed according to the channel quality condition of the repeater to the user and the service quality requirement of the user through a corresponding anti-interference joint resource scheduling algorithm;
s4, the carrier frequency in the step S3 passes through a PLL frequency synthesizer module, the frequency dividing ratio of the programmable frequency divider is adjusted through the parameters after resource optimization, and the frequency of the signal is adjusted to the carrier frequency after optimization;
S5, the output carrier frequency obtained in the step S4 passes through a power amplifier, and finally, the optimized carrier and signals are retransmitted to the user end by a backward antenna, so that the joint scheduling effect of the wireless resources at the repeater is realized.
Further, the PLL frequency synthesizer in step S3 is composed of a reference frequency divider, a phase comparator, a loop filter, a voltage controlled oscillator, and a programmable frequency divider.
Further, the processing manner of the PLL frequency synthesizer in step S4 includes the following steps:
s41, setting the frequency division coefficient of the reference frequency divider as M, and dividing the frequency of the signal received by the repeater by the reference frequency divider The output signal after frequency division is used as a reference signal of a phase comparator;
S42, setting the output signal of the voltage-controlled oscillator as f 0, setting the frequency division coefficient of the programmable frequency divider as N, dividing frequency f 0 by the programmable frequency divider to obtain f 2,
S43, after frequency division, the phase signals are returned to the input end of the phase comparator to be compared with the reference signal f 1, whether f 1 is equal to f 2 is compared, if not, the phase difference of the two signals is converted into a pulse signal with the width in direct proportion to the phase difference, namely
ud(t)＝kd[θe(t)]
Wherein: kd is the gain coefficient of the phase detector, θe (t) =θ1 (t) - θ2 (t) representing the phase difference between the two input signals;
S44, filtering the pulse signal in the step S33 through a loop filter to obtain a direct-current voltage as a control voltage-controlled oscillator frequency output, and outputting when the loop is in a locked state, f 1＝f2 The frequency dividing coefficients M and N of the reference frequency divider and the programmable frequency divider are changed, so that signals with different frequencies can be output.
Further, the specific steps of the anti-interference joint resource scheduling algorithm in the step S3 are as follows:
S31, determining a frequency division coefficient M of a reference frequency division ratio according to the number L of the repeater and the number of the carrier channel I;
S32, calculating the transmission rate of the corresponding user k for each channel i of each repeater l, searching the repeater l and the channel i corresponding to the maximum R k in all LI values, and carrying out frequency scheduling.
Further, the specific calculation mode of R k in step S32 is as follows:
In the system, L repeater stations provide service for users, each repeater station L has the same frequency resource, namely, the center frequency is f, the bandwidth is B, the repeater station L is divided into I channels, the bandwidth of each channel is B/I, the frequency of the ith channel is f i = if/I, and the signal-to-interference-noise ratio of a user k connected to the ith channel of the repeater station L is:
Wherein, Is the channel response of user k on the ith of repeater l,/>Is the corresponding noise power,/>The channel gain of the ith channel of the other repeater j except the repeater l, namely the interference part, of the user k is realized, wherein the carrier power of each channel is consistent;
the instantaneous data rate that user k can reach on the ith channel of repeater l:
scheduling repeater and frequency resources with user k data rate maximization as optimization objective
l∈L,i∈I。
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the PLL frequency synthesizer is integrated at the repeater, and the frequency spectrum is divided to a certain extent, so that carriers of a plurality of frequency points are obtained, and signals are modulated onto the optimal carrier frequency, so that interference among the repeater is reduced.
2. The invention integrates the PLL frequency synthesizer module in the repeater, reallocates the resources through the corresponding anti-interference joint resource scheduling algorithm, changes the frequency dividing ratio through the programmable frequency divider to adjust the frequency of the received signal, and reduces the integral interference of the multi-repeater system while meeting the system condition.
Drawings
Fig. 1 is a schematic diagram of a multi-repeater cooperative network in the present invention;
fig. 2 is a schematic diagram of a resource scheduling principle of a repeater in the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
As shown in fig. 1, the co-channel interference problem exists inevitably in a multi-repeater system, that is, interference signals from a plurality of repeaters may be received by the same user, so that signal quality of the user is reduced and available wireless resources of the system are wasted.
S1, a base station sends downlink signals to a user and a repeater at the frequency of f;
S2, the repeater receives the downlink signal of the base station in the step S1 into the repeater through a forward antenna (donor antenna), amplifies the useful signal through a low-noise amplifier, suppresses noise signals in the signal and improves signal-to-noise ratio (S/N);
S3, the signal processed by the S2 and the channel state information of the repeater to the user are sent to a controller, and the carrier frequency is redistributed according to the channel quality condition of the repeater to the user and the service quality requirement of the user through a corresponding anti-interference joint resource scheduling algorithm, wherein the channel state information of the repeater to the user can be obtained through a certain channel estimation method, and the service quality requirement of the user is given, and the invention is a known condition;
The specific steps of the anti-interference joint resource scheduling algorithm in the step S3 are as follows:
S31, determining a frequency division coefficient M of a reference frequency division ratio according to the number L of the repeater and the number of the carrier channel I;
S32, calculating the transmission rate of a corresponding user k for each channel i of each repeater l, searching the repeater l and the channel i corresponding to the maximum R k in all LI values, and carrying out frequency scheduling;
The specific calculation mode of R k in step S32 is as follows:
In the system, L repeater stations provide service for users, each repeater station L has the same frequency resource, namely, the center frequency is f, the bandwidth is B, the repeater station L is divided into I channels, the bandwidth of each channel is B/I, the frequency of the ith channel is f i = if/I, and the signal-to-interference-noise ratio of a user k connected to the ith channel of the repeater station L is:
Wherein, Is the channel response of user k on the ith of repeater l,/>Is the corresponding noise power,/>The channel gain of the ith channel of the other repeater j except the repeater l, namely the interference part, of the user k is realized, wherein the carrier power of each channel is consistent;
the instantaneous data rate that user k can reach on the ith channel of repeater l:
scheduling repeater and frequency resources with user k data rate maximization as optimization objective
l∈L,i∈I；
S4, the carrier frequency in the step S3 passes through a PLL frequency synthesizer module, the frequency dividing ratio of the programmable frequency divider is adjusted through the parameters after resource optimization, and the frequency of the signal is adjusted to the carrier frequency after optimization;
The PLL frequency synthesizer in step S4 is composed of a reference frequency divider, a phase comparator, a loop filter, a voltage controlled oscillator, and a programmable frequency divider, where the processing mode of the PLL frequency synthesizer includes the following steps:
s41, setting the frequency division coefficient of the reference frequency divider as M, and dividing the frequency of the signal received by the repeater by the reference frequency divider The output signal after frequency division is used as a reference signal of a phase comparator;
S42, setting the output signal of the voltage-controlled oscillator as f 0, setting the frequency division coefficient of the programmable frequency divider as N, dividing frequency f 0 by the programmable frequency divider to obtain f 2,
S43, after frequency division, the phase signals are returned to the input end of the phase comparator to be compared with the reference signal f 1, whether f 1 is equal to f 2 is compared, if not, the phase difference of the two signals is converted into a pulse signal with the width in direct proportion to the phase difference, namely
ud(t)＝kd[θe(t)]
Wherein: kd is the gain coefficient of the phase detector, θe (t) =θ1 (t) - θ2 (t) representing the phase difference between the two input signals;
S44, filtering the pulse signal in the step S33 through a loop filter to obtain a direct-current voltage as a control voltage-controlled oscillator frequency output, and outputting when the loop is in a locked state, f 1＝f2 The frequency dividing coefficients M and N of the reference frequency divider and the programmable frequency divider can be changed through software or hardware programming, and signals with different frequencies can be output;
S5, the output carrier frequency obtained in the step S4 passes through a power amplifier, and finally, the optimized carrier and signals are retransmitted to the user end through a backward antenna (retransmission antenna), so that the joint scheduling effect on wireless resources at the repeater is realized, and the interference condition in the whole system is reduced.
Specifically, the main index of the PLL frequency synthesizer is:
1. Output frequency range: including center frequency and bandwidth.
2. Modulation performance: refers to whether the output of the frequency synthesizer has Amplitude Modulation (AM), frequency Modulation (FM), phase Modulation (PM), etc.
3. Frequency conversion time
4. Frequency interval: frequency refers to the minimum separation of two output frequencies, also known as frequency resolution. Different frequency synthesizers for different applications have different requirements for frequency spacing, down to a few hertz and up to the order of megahertz.
5. Frequency stability: the frequency stability refers to the value of the frequency deviation of the output frequency of the frequency synthesizer from a standard value in a specified time interval, and is divided into 3 stability of long term, short term, instant and the like.
The present invention is not limited to the preferred embodiments, but the patent protection scope of the invention is defined by the claims, and all equivalent structural changes made by the specification and the drawings are included in the scope of the invention.

Claims (1)

1. The joint resource scheduling method of the multi-repeater is characterized by comprising the following steps:
S1, a base station sends downlink signals to a user and a repeater at the frequency of f;
S2, the repeater receives the downlink signal of the base station in the step S1 into the repeater by using a forward antenna, amplifies the useful signal by using a low-noise amplifier, suppresses noise signals in the signal and improves the signal-to-noise ratio;
S3, the signal processed by the S2 and the channel state information of the repeater to the user are sent to a controller, and the carrier frequency is redistributed according to the channel quality condition of the repeater to the user and the service quality requirement of the user through a corresponding anti-interference joint resource scheduling algorithm;
The specific steps of the anti-interference joint resource scheduling algorithm in the step S3 are as follows:
S31, determining a frequency division coefficient M of a reference frequency division ratio according to the number L of the repeater and the number of the carrier channel I;
S32, calculating the transmission rate of a corresponding user k for each channel i of each repeater l, searching the repeater l and the channel i corresponding to the maximum R k in all LI values, and carrying out frequency scheduling;
The specific calculation mode of R k in step S32 is as follows:
In the system, L repeater stations provide service for users, each repeater station L has the same frequency resource, namely, the center frequency is f, the bandwidth is B, the repeater station L is divided into I channels, the bandwidth of each channel is B/I, the frequency of the ith channel is f i = if/I, and the signal-to-interference-noise ratio of a user k connected to the ith channel of the repeater station L is:
Wherein, Is the channel response of user k on the ith of repeater l,/>Is the corresponding noise power,/>The channel gain of the ith channel of the other repeater j except the repeater l, namely the interference part, of the user k is realized, wherein the carrier power of each channel is consistent;
the instantaneous data rate that user k can reach on the ith channel of repeater l:
scheduling repeater and frequency resources with user k data rate maximization as optimization objective
l∈L,i∈I；
S4, the carrier frequency in the step S3 passes through a PLL frequency synthesizer module, the frequency dividing ratio of the programmable frequency divider is adjusted through the parameters after resource optimization, and the frequency of the signal is adjusted to the carrier frequency after optimization;
The PLL frequency synthesizer in step S4 is composed of a reference frequency divider, a phase comparator, a loop filter, a voltage-controlled oscillator, and a programmable frequency divider;
the processing mode of the PLL frequency synthesizer in step S4 includes the following steps:
s41, setting the frequency division coefficient of the reference frequency divider as M, and dividing the frequency of the signal received by the repeater by the reference frequency divider The output signal after frequency division is used as a reference signal of a phase comparator;
S42, setting the output signal of the voltage-controlled oscillator as f 0, setting the frequency division coefficient of the programmable frequency divider as N, dividing frequency f 0 by the programmable frequency divider to obtain f 2,
S43, after frequency division, the phase signals are returned to the input end of the phase comparator to be compared with the reference signal f 1, whether f 1 is equal to f 2 is compared, if not, the phase difference of the two signals is converted into a pulse signal with the width in direct proportion to the phase difference, namely
ud(t)＝kd[θe(t)]
Wherein: kd is the gain coefficient of the phase detector, θe (t) =θ1 (t) - θ2 (t) representing the phase difference between the two input signals;
S44, filtering the pulse signal in the step S33 through a loop filter to obtain a direct-current voltage as a control voltage-controlled oscillator frequency output, and outputting when the loop is in a locked state, f 1＝f2 The frequency dividing coefficients M and N of the reference frequency divider and the programmable frequency divider are changed, so that signals with different frequencies can be output;
S5, the output carrier frequency obtained in the step S4 passes through a power amplifier, and finally, the optimized carrier and signals are retransmitted to the user end by a backward antenna, so that the joint scheduling effect of the wireless resources at the repeater is realized.
CN202311539155.8A 2023-11-17 2023-11-17 Combined resource scheduling method for multiple repeater Active CN117580165B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311539155.8A CN117580165B (en) 2023-11-17 2023-11-17 Combined resource scheduling method for multiple repeater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311539155.8A CN117580165B (en) 2023-11-17 2023-11-17 Combined resource scheduling method for multiple repeater

Publications (2)

Publication Number Publication Date
CN117580165A CN117580165A (en) 2024-02-20
CN117580165B true CN117580165B (en) 2024-05-10

Family

ID=89893002

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311539155.8A Active CN117580165B (en) 2023-11-17 2023-11-17 Combined resource scheduling method for multiple repeater

Country Status (1)

Country Link
CN (1) CN117580165B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2622968Y (en) * 2003-05-23 2004-06-30 厦门厦华特力通科技有限公司 Shift converter of straight base station
CN101359955A (en) * 2008-09-08 2009-02-04 深圳国人通信有限公司 Repeater and interference signal eliminating method thereof
CN102711151A (en) * 2012-05-02 2012-10-03 京信通信系统（中国）有限公司 Intelligent digital radio-frequency repeater and control method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2622968Y (en) * 2003-05-23 2004-06-30 厦门厦华特力通科技有限公司 Shift converter of straight base station
CN101359955A (en) * 2008-09-08 2009-02-04 深圳国人通信有限公司 Repeater and interference signal eliminating method thereof
CN102711151A (en) * 2012-05-02 2012-10-03 京信通信系统（中国）有限公司 Intelligent digital radio-frequency repeater and control method thereof

Also Published As

Publication number Publication date
CN117580165A (en) 2024-02-20

Similar Documents

Publication Publication Date Title
US10749565B1 (en) RF front end reduction of receiver de-sensitivity
US7570919B2 (en) Transmitter, receiver, and radio communications system and method
US8942756B2 (en) Uplink power control scheme
US7680476B2 (en) Receiving device
US7751430B2 (en) Self optimization of time division duplex (TDD) timing and adaptive modulation thresholds
US9083413B2 (en) Method for reducing interference in a radio network equipment and equipment performing the method
CN107248908B (en) Hybrid duplex transmission method in cognitive relay network based on relay selection
CN101090279A (en) Wireless transceiver and its modulation path delay calibration method
US5790601A (en) Low cost very small aperture satellite terminal
CN114513245B (en) Satellite adjustable communication system based on FPGA
US11343700B2 (en) Spectrum management for a point-to-multipoint wireless network
CN115102824A (en) System and method for hybrid transmitter
JPH05252559A (en) Diversity transmission and reception system
CN117580165B (en) Combined resource scheduling method for multiple repeater
US10284324B2 (en) Methods and apparatus for multiplexing and demultiplexing signals
US3987396A (en) Repeater system
CN114762260B (en) Wake-up communication in a wireless communication system
EP3057276B1 (en) Radio base station, user terminal, and radio communication method
CN1711696B (en) Transmitting stage
JPH06350537A (en) Radio signal optical transmitting method and communication equipment using the same
Li et al. On full-duplex link performance under consideration of error vector magnitude
JPH11127476A (en) Radio communication system
CN217985068U (en) Bluetooth device based on Sub-GHz frequency band
US20230371059A1 (en) Automatic gain control for super-high order modulations
Hussein et al. Power Adaptation for Full-Duplex Relay-Aided D2D Communications with Direct Link

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant