WO2017000699A1

WO2017000699A1 - Data processing method and device for multiple cell-sharing rrus

Info

Publication number: WO2017000699A1
Application number: PCT/CN2016/082640
Authority: WO
Inventors: 陈曦; 邹志强
Original assignee: 华为技术有限公司
Priority date: 2015-06-29
Filing date: 2016-05-19
Publication date: 2017-01-05
Also published as: CN104980382A; CN104980382B

Abstract

Disclosed are a data processing method and device for multiple cell-sharing RRUs. The method provided in the embodiments of the present invention comprises: respectively receiving time domain data sent by each of multiple cell-sharing RRUs, and converting the time domain data of each RRU into frequency domain data corresponding to each RRU; detecting a user's effective bandwidth in the frequency domain data corresponding to each RRU according to a user signal contained in the frequency domain data corresponding to each RRU; removing the frequency domain data with frequency values outside the user's effective bandwidth among the frequency domain data respectively corresponding to each RRU, and obtaining the frequency domain data which contains the user signal; respectively merging the frequency domain data containing the user signal according to a channel corresponding to each RRU, and sending the merged frequency domain data including the user signals to a base band unit (BBU).

Description

Data processing method and device for multiple RRUs of a common cell

This application claims the priority of the Chinese Patent Application filed on June 29, 2015, the Chinese Patent Application No. 201510371687.4, entitled "Data Processing Method and Apparatus for Multiple RRUs of a Common Cell", the entire contents of which are hereby incorporated by reference. This is incorporated herein by reference.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a data processing method and apparatus for multiple RRUs of a common cell.

Background technique

In a solution of a common cell of multiple radio remote units (English full name: Radio Remote Unit, English abbreviation: RRU), multiple RRUs under the same baseband processing unit (English name: Base Band Unit, English abbreviation: BBU) Although they are distributed in different geographical locations, they belong to the same cell logically, so the cell configuration parameters of each RRU are the same. Multiple RRU common cell solutions are mainly used in indoor distributed scenes and outdoor high-speed scenes, such as large building coverage and signal coverage along the high-speed rail. The solution of multiple RRU common cells can significantly improve the cell coverage capability, reduce the number of cell handovers, and improve the user experience.

In a solution of multiple RRU common cells, for the uplink, the BBU can receive uplink data of multiple channels of different RRUs. In the processing of the uplink data by the BBU, the BBU aligns the antenna data acquired by all the RRUs, and then performs subsequent processing according to the data processing method of the common multi-antenna cell. That is, channel estimation is performed on antenna data of multiple antennas respectively, and channel estimation results of all antennas are obtained respectively, and joint frequency detection of frequency domain data of all antennas is performed at the same time. The processing method of joint equalization detection is similar to the processing of a common multi-antenna cell. Although the processing flow is simple, since the number of antennas needs to simultaneously process more antenna data as the number of RRUs of the common cell increases, this means The required baseband processing resources will increase dramatically as the number of antennas to be processed increases, which obviously makes it difficult to support the processing of upstream data for a larger number of RRUs.

In order to reduce the demand for the baseband processing resources and increase the number of RRUs of the supported common cells, the following solutions exist in the prior art: refer to the uplink of multiple RRUs in the prior art as shown in FIG. Schematic diagram of the implementation of the accumulation of data in the time domain, with four RRUs (respectively The uplink data of RRU1, RRU2, RRU3, and RRU4) is combined as an example. Each RRU of RRU1, RRU2, and RRU4 outputs uplink data and noise floor, and RRU3 outputs noise floor. According to the number of RRUs and the occupation of baseband processing resources. The uplink data of some or all of the RRUs is accumulated in the time domain, and the accumulated uplink data is transmitted to the BBU for subsequent processing. The method combines the uplink data of multiple RRUs into one uplink data, thereby reducing the BBU's requirement for baseband processing resources. However, the method of accumulating the uplink data of multiple RRUs accumulates the uplink data and the noise floor of the corresponding channels of multiple RRUs. As shown in FIG. 1 , the accumulation of the bottom noise causes the total interference after the accumulation. If the noise power increases, it will bring about the rise of the noise floor, which will affect the receiving performance of the uplink. Especially when the number of supported RRUs is large, the uplink data that needs to be merged will increase accordingly, so that the noise floor is raised. The problem is more prominent.

Summary of the invention

The embodiment of the invention provides a data processing method and device for multiple RRUs of a common cell, which are used for realizing the merging of uplink data of multiple RRUs without causing the noise to rise.

To solve the above technical problem, the embodiment of the present invention provides the following technical solutions:

In a first aspect, an embodiment of the present invention provides a data processing method for multiple RRUs of a common cell, including:

Receiving the time domain data sent by each RRU of the multiple RRUs of the common cell, and converting the time domain data of each RRU into the frequency domain data corresponding to each RRU;

And detecting, according to the user signal included in the frequency domain data corresponding to each RRU, a user effective bandwidth in the frequency domain data corresponding to each RRU;

Clearing, in the frequency domain data corresponding to each RRU, frequency domain data outside the effective bandwidth of the user, to obtain frequency domain data including the user signal;

The frequency domain data including the user signal is separately combined according to the channel corresponding to the RRU, and the combined frequency domain data including the user signal is sent to the baseband processing unit BBU.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the detecting, by the user signal included in the frequency domain data corresponding to each RRU, the frequency domain data corresponding to each RRU is detected. User effective bandwidth, including:

Detecting whether the user signal is included in the frequency domain data corresponding to each RRU according to scheduling information of all user equipments of the cell;

For detecting the frequency domain data including the user signal, the frequency range occupied by the detected user signal for uplink scheduling transmission is used as the user effective bandwidth of the frequency domain data;

For detecting frequency domain data not including the user signal, the user effective bandwidth of the frequency domain data not including the user signal is set to zero.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the determining, according to the scheduling information of all user equipments of the cell, the frequency of each RRU Whether the user signal is included in the domain data, including:

Obtaining scheduling information of all UEs of the cell from the BBU;

Obtaining an uplink pilot signal of each UE of the cell from the frequency domain data corresponding to each RRU according to the scheduling information;

Performing cross-correlation calculation on the uplink pilot signal and the pilot sequence of each UE of the cell to obtain a pilot cross-correlation result;

If the pilot cross-correlation result is greater than a preset pilot threshold, detecting that the user signal is included in the frequency domain data, and if the pilot cross-correlation result is less than or equal to the pilot threshold, then the frequency is It is detected in the domain data that the user signal is not included.

With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the determining, according to the scheduling information of all the user equipment UEs of the cell, the frequency corresponding to each RRU Whether the user signal is included in the domain data, including:

Obtaining scheduling information of all UEs of the cell from the BBU;

And measuring, according to the scheduling information, an uplink reference signal received power RSRP of each UE of the cell in the frequency domain data corresponding to each RRU;

If the uplink RSRP is greater than a preset power threshold, detecting that the user signal is included in the frequency domain data, if the uplink RSRP is less than or equal to the power threshold, detecting that the frequency domain data is not included User signal.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, if each RRU includes N channels, the frequency domain data corresponding to each RRU includes: N paths corresponding to the N channels Frequency domain data, the N being a natural number greater than or equal to 2,

And detecting, according to the user signal included in the frequency domain data corresponding to each RRU, the effective bandwidth of the user in the frequency domain data corresponding to each RRU, including:

Cross-correlating any two frequency domain data corresponding to the same RRU in the N frequency domain data Calculate and obtain data cross-correlation results;

If the data cross-correlation result is greater than the preset data threshold, the user signal is scheduled in the coverage of the RRU corresponding to the two-way frequency domain data, and the maximum transmission bandwidth configured by the system is used as the arbitrary two-way frequency domain. User effective bandwidth of data;

If the cross-correlation result is less than or equal to the correlation threshold, the user signal is not scheduled within the coverage of the RRU corresponding to the any two-way frequency domain data, and the effective bandwidth of the user of the two-way frequency domain data is set to zero.

With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the detecting, by the user signal included in the frequency domain data corresponding to each RRU, the frequency domain data corresponding to each RRU is detected. User effective bandwidth, including:

And sequentially counting the total energy of all subcarriers in each resource block RB in the frequency domain data corresponding to each RRU;

Determining that the RBs of all the subcarriers in the frequency domain data that are greater than the energy threshold are within the user effective bandwidth of the frequency domain data, and determining that the total energy of all subcarriers in the frequency domain data is less than or equal to the energy threshold is in the RB. Frequency domain data outside the user's effective bandwidth;

The RBs whose total energy of all subcarriers in the frequency domain data is greater than the energy threshold are accumulated, and the effective bandwidth of the user of the frequency domain data is obtained.

In a second aspect, the embodiment of the present invention further provides a data processing apparatus for multiple RRUs of a common cell, including:

a time-frequency conversion module, configured to respectively receive time domain data sent by each RRU of the plurality of RRUs of the common cell, and convert time domain data of each RRU into frequency domain data corresponding to each RRU;

a bandwidth detecting module, configured to detect, according to a user signal included in the frequency domain data corresponding to each RRU, a user effective bandwidth in the frequency domain data corresponding to each RRU;

a data clearing module, configured to: clear frequency domain data of frequency domain data corresponding to each RRU in the frequency domain data other than the effective bandwidth of the user, to obtain frequency domain data including the user signal;

The frequency domain merging module is configured to combine the frequency domain data including the user signal according to the channel corresponding to the RRU, and send the combined frequency domain data including the user signal to the baseband processing unit BBU.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the bandwidth detecting module includes:

a user signal detecting unit, configured to detect, according to scheduling information of all user equipments UE of the cell, whether the user signal is included in frequency domain data corresponding to each RRU;

a first effective bandwidth acquiring unit, configured to: for detecting frequency domain data including the user signal, use a frequency range occupied by the detected user signal for uplink scheduling transmission as a user effective bandwidth of the frequency domain data; For detecting frequency domain data not including the user signal, the user effective bandwidth of the frequency domain data not including the user signal is set to zero.

With reference to the first possible implementation of the second aspect, in a second possible implementation manner of the second aspect, the user signal detecting unit includes:

a scheduling information acquiring unit, configured to acquire scheduling information of all UEs of the cell from the BBU;

a pilot signal acquiring unit, configured to acquire, according to the scheduling information, an uplink pilot signal of each UE of the cell from the frequency domain data corresponding to each RRU;

a first cross-correlation calculation unit, configured to perform cross-correlation calculation according to an uplink pilot signal and a pilot sequence of each UE of the cell, to obtain a pilot cross-correlation result;

a first analyzing unit, configured to: if the pilot cross-correlation result is greater than a preset pilot threshold, detecting that the user signal is included in the frequency domain data, if the pilot cross-correlation result is less than or equal to the The pilot threshold is detected in the frequency domain data not including the user signal.

With reference to the first possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the user signal detecting unit includes:

a measuring unit, configured to measure, according to the scheduling information, an uplink reference signal received power RSRP of each UE of the cell in the frequency domain data corresponding to each RRU;

a second analyzing unit, configured to: if the uplink RSRP is greater than a preset power threshold, detecting that the user signal is included in the frequency domain data, and if the uplink RSRP is less than or equal to the power threshold, in the frequency domain It is detected in the data that the user signal is not included.

With reference to the second aspect, in a fourth possible implementation manner of the second aspect, if each RRU includes N channels, the frequency domain data corresponding to each RRU includes: N paths corresponding to the N channels Frequency domain data, the N being a natural number greater than or equal to 2,

The bandwidth detection module includes:

a second cross-correlation calculation unit, configured to perform cross-correlation calculation on any two frequency domain data corresponding to the same RRU in the N-channel frequency domain data, to obtain a data cross-correlation result;

a second effective bandwidth acquiring unit, configured to: if the data cross-correlation result is greater than a preset data threshold, the user signal is scheduled to be within the coverage of the RRU corresponding to the arbitrary two-way frequency domain data, and the maximum transmission of the system configuration is configured. The bandwidth is used as the user effective bandwidth of the arbitrary two-way frequency domain data; if the cross-correlation result is less than or equal to the correlation threshold, no user signal is scheduled within the coverage of the RRU corresponding to the arbitrary two-way frequency domain data. The user effective bandwidth of any two of the frequency domain data is set to zero.

With reference to the second aspect, in a fifth possible implementation manner of the second aspect, the bandwidth detecting module includes:

An energy statistics unit, configured to sequentially count the total energy of all subcarriers in each resource block RB in the frequency domain data corresponding to each RRU;

a resource block detecting unit, configured to determine that an RB whose total energy of all subcarriers in the frequency domain data is greater than an energy threshold is within a user effective bandwidth of the frequency domain data, and determine that a total energy of all subcarriers in the frequency domain data is less than or equal to The RB of the energy threshold is outside the effective bandwidth of the user of the frequency domain data;

And a third effective bandwidth acquiring unit, configured to accumulate RBs whose total energy of all subcarriers in the frequency domain data is greater than an energy threshold, to obtain a user effective bandwidth of the frequency domain data.

It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages:

In the embodiment of the present invention, the time domain data sent by each RRU of the multiple RRUs of the common cell is respectively received, and the time domain data of each RRU is converted into the frequency domain data corresponding to each RRU, and then according to each RRU. The user signal included in the corresponding frequency domain data detects the effective bandwidth of the user in the frequency domain data corresponding to each RRU, and then clears the frequency domain data in the frequency domain data corresponding to each RRU in the frequency domain data other than the effective bandwidth of the user. The frequency domain data including the user signal is obtained, and the frequency domain data including the user signal is separately combined according to the channel corresponding to the RRU, and the combined frequency domain data including the user signal is sent to the baseband processing unit BBU. In the embodiment of the present invention, the time domain data of each RRU of the common cell is converted into frequency domain data, so as to perform detection of the effective bandwidth of the user in the frequency domain, which is different from the data in the time domain of the RRU in the prior art. In the embodiment of the present invention, after determining the effective bandwidth of the user in the frequency domain data corresponding to each RRU, the outband noise may be cleared for the frequency domain data corresponding to each RRU according to the effective bandwidth of the user, and only the inclusion is included. The frequency domain data of the user signal is combined to avoid the superposition of noise between different RRUs, and avoid the existing technology. In the bottom noise uplift problem, the signal-to-noise ratio of the RRU's frequency domain data is improved, and the uplink receiving performance is improved.

DRAWINGS

In order to more clearly illustrate the prior art and the technical solutions in the embodiments of the present invention, the drawings used in the prior art and the description of the embodiments of the present invention will be briefly described below. Obviously, the attached in the following description The drawings are only some of the embodiments of the present invention, and other figures may be obtained from those skilled in the art from the drawings.

FIG. 1 is a schematic diagram of an implementation manner of accumulating uplink data of multiple RRUs in the time domain in the prior art; FIG.

2 is a schematic structural diagram of applying a data processing method of multiple RRUs of a common cell to a distributed base station according to an embodiment of the present disclosure;

FIG. 3 is a schematic block diagram of a data processing method for multiple RRUs of a common cell according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of an implementation scenario of data merging in a frequency domain of four RRUs of a common cell according to an embodiment of the present invention;

FIG. 5 is a schematic block diagram of a data processing method of another RRU of another common cell according to an embodiment of the present disclosure;

FIG. 6 is a schematic block diagram of a data processing method of multiple RRUs of another common cell according to an embodiment of the present disclosure;

FIG. 7 is a schematic block diagram of a data processing method of multiple RRUs of another common cell according to an embodiment of the present disclosure;

FIG. 8-a is a schematic structural diagram of a data processing apparatus of multiple RRUs in a common cell according to an embodiment of the present disclosure;

FIG. 8-b is a schematic structural diagram of a bandwidth detecting module according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a user signal detecting unit according to an embodiment of the present disclosure;

FIG. 8-d is a schematic structural diagram of another user signal detecting unit according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of another bandwidth detecting module according to an embodiment of the present disclosure;

FIG. 8-f is a schematic structural diagram of another bandwidth detecting module according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a data processing apparatus of another RRU of another common cell according to an embodiment of the present invention.

detailed description

The embodiment of the invention provides a data processing method and device for multiple RRUs of a common cell, which are used for realizing the merging of uplink data of multiple RRUs without causing the noise of the bottom noise to rise.

In order to make the object, the features and the advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of the present invention.

The terms "first", "second" and the like in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It is to be understood that the terms so used are interchangeable as appropriate, and are merely illustrative of the manner in which the objects of the same. In addition, the terms "comprises" and "comprises" and "comprises", and any variations thereof, are intended to cover a non-exclusive inclusion so that a process, method, system, product, or device comprising a series of units is not necessarily limited to those elements, but may include Other units listed or inherent to these processes, methods, products or equipment.

The application scenario of the data processing method of the multiple RRUs of the common cell provided by the embodiment of the present invention is described in the following. The method provided by the embodiment of the present invention can be applied to the data transmission process between the BBU and the RRU in the distributed base station, and the present invention mainly It is applied to the long-term evolution (English term: Long Term Evolution, English abbreviation: LTE) system of multiple RRU common cells. The application scenarios include indoor distributed scenes and outdoor high-speed scenes, such as large building coverage and signal coverage along the high-speed rail. Multiple RRUs are used to perform indoor distributed coverage. Different RRUs belong to the same cell, which can reduce the number of handover/reselection times, reduce dropped calls caused by frequent handovers, and improve key performance indicators (English full name: Key Performance Indicator, English abbreviation: KPI) indicator. The reduction in the number of cells can also reduce the complexity of network planning, reduce co-channel interference between cells, and improve user experience. In an outdoor high-speed scenario, by adopting multiple RRU common cells, the coverage of a single cell can be expanded, and the coverage overlap area of a neighboring cell can be expanded, thereby reducing the number of cell reselection and cell handover, and reducing the dropped call rate of the terminal. Improve continuous coverage in high-speed environments, and solve the problem of high-speed mobile terminals Resident, access, and call issues in the environment.

As shown in FIG. 2, the data processing method of multiple RRUs in a common cell according to an embodiment of the present invention is applied to a distributed base station, and multiple RRUs are included in one BBU, and the distributed base station in FIG. 2 includes 7 RRUs are taken as an example, where RRU3, RRU4, and RRU5 are three RRUs of a common cell, and the three RRUs are connected by a RRU combining unit 1 and a BBU, and RRU6 and RRU7 are two RRUs of a common cell, and the two RRUs pass The RRU combining unit 2 and the BBU are connected, and the data processing method of the multiple RRUs of the common cell of the present invention can be implemented on the RRU combining unit, that is, the data processing method of multiple RRUs of the common cell provided by the present invention can be combined with the RRU unit 1 and The RRU merging unit 2 is used as a method execution entity. The RRU merging unit is used as a middleware between the RRU and the BBU. It can be deployed as a separate module in the base station or integrated with an RRU or BBU. The data processing apparatus of the multiple RRUs of the common cell provided by the subsequent embodiments of the present invention may be an independent device implemented based on the RRU merging unit, or an integrated device integrated with the RRU or the BBU.

The distributed website shown in Figure 2 can be applied to an LTE network. The distributed base station architecture separates the BBU and the RRU in the traditional macro base station. The BBU and the RRU are generally connected by optical fibers, and a unified general public is defined. Common Public Radio Interface (CPRI) standard. The BBU in the distributed base station architecture mainly performs baseband processing, and the RRU mainly performs intra-frequency radio processing. The RRU merging unit mainly performs uplink data processing on uplink time domain data of multiple RRU corresponding channels of the common cell to reduce noise in the uplink time domain data. To avoid the noise floor rise problem caused by the direct superposition of uplink time domain data.

The details are described below separately.

The method provided by the embodiment of the present invention is applicable to an embodiment of a data processing method of multiple RRUs in a common cell of the present invention in a data transmission process between a BBU and an RRU in a distributed base station. Referring to FIG. 3, the present invention is shown in FIG. A data processing method for multiple RRUs of a common cell provided by an embodiment may specifically include the following steps:

301. Receive time domain data sent by each RRU of the multiple RRUs of the common cell, and convert time domain data of each RRU into frequency domain data corresponding to each RRU.

In the embodiment of the present invention, each RRU of the multiple RRUs of the common cell corresponds to one or more channels, and the RRU channel is a path for signal transmission, and each channel corresponds to feedback of one antenna, and the number of RRU channels is equal to the number of feeders. In the LTE uplink receiving link, the RRU first receives the number from the antenna port. According to the RRU, the RRU first performs the radio frequency processing, and the data in the middle RF processing process is processed through the following units: a duplexer, a low noise amplifier, a receiver, and a digital intermediate frequency processing unit, and converts the received RF signal into a time domain number. Baseband signals, also known as time domain data. Specifically, the duplexer first separates the transmitted signal and the received signal, and the low noise amplifier amplifies the received RF signal, and the receiver mainly performs analog down conversion, analog automatic gain control, and modulus on the amplified RF signal. The conversion process converts the radio frequency signal to the digital intermediate frequency signal, and the digital intermediate frequency processing unit performs digital down conversion, downsampling, filtering, digital automatic gain control and the like on the digital intermediate frequency signal to convert the digital intermediate frequency signal into a digital baseband signal. After the multiple RRUs of the common cell complete the radio frequency processing to obtain the time domain data, each RRU is reported to the data processing device of the multiple RRUs of the common cell. Therefore, multiple embodiments of the common cell can be separately received in the embodiment of the present invention. Time domain data sent by each RRU in the RRU. It should be noted that, in the embodiment of the present invention, if each RRU includes one channel, the time domain data of each RRU may be the time domain on one channel of the RRU. Data, if each RRU includes multiple channels, for example, including N channels, and N is a natural number greater than or equal to 2, the time domain data sent by each RRU in step 301 may refer to N channels in each RRU. Corresponding N time domain data.

In the embodiment of the present invention, after the time domain data is received from each RRU of the common cell, the time domain data of each RRU is converted into the frequency domain data corresponding to each RRU, and the data subsequently performed in the embodiment of the present invention is performed. Merging refers to data merging in the frequency domain, which is a completely different implementation principle than data merging in the prior art in the time domain. It should be noted that, in the embodiment of the present invention, if each RRU includes one channel, the frequency domain data corresponding to each RRU may be frequency domain data on one channel of the RRU, if each RRU includes multiple channels. For example, N channels are included, and N is a natural number greater than or equal to 2. The frequency domain data corresponding to each RRU in step 301 may refer to N frequency domain data corresponding to N channels in each RRU.

Further, in the embodiment of the present invention, converting time domain data of each RRU into frequency domain data corresponding to each RRU may be performed by orthogonal frequency division multiplexing (English full name: Orthogonal Frequency Division Multiplexing, English abbreviation: OFDM) The symbol generation inverse processing is implemented to convert the time domain data into frequency domain data. The inverse processing of the OFDM symbol generation includes a de-cyclic prefix (English full name: Cyclic Prefix, abbreviation: CP) processing and Fourier transform processing, and the Fourier transform may specifically refer to a fast Fourier transform (English full name: Fast) Fourier Transform, English abbreviation: FFT).

302. Detect each RRU according to a user signal included in frequency domain data corresponding to each RRU. User effective bandwidth in the corresponding frequency domain data.

In the embodiment of the present invention, after obtaining the frequency domain data corresponding to each RRU, the frequency domain data carries a user signal that needs to be scheduled to be sent to the user, so that each RRU corresponding to the user data carried in the frequency domain data can be detected. User effective bandwidth in the frequency domain data. The user signal refers to a user signal that is scheduled to be sent to the user equipment (English name: User Equipment, English abbreviation: UE) within the coverage of the RRU. The frequency range occupied by the user signal on the subcarrier is the effective bandwidth of the user. For example, in the embodiment of the present invention, when the user effective bandwidth detection is performed, the frequency domain data of each RRU is analyzed to determine whether the frequency domain data contains a user signal, and after determining the frequency domain data, the user signal is included, and then obtained. The bandwidth occupied by the signal transmission to the user is the effective bandwidth of the user. In the embodiment of the present invention, the user effective bandwidth in the frequency domain signal is detected to determine the frequency position of the user signal transmission, and the frequency domain data outside the effective bandwidth of the user is not user data, but interference noise. After detecting the frequency domain signal in the embodiment of the present invention, step 303 is triggered.

303. Clear the frequency domain data of the frequency domain data corresponding to each RRU in the frequency domain data other than the effective bandwidth of the user, to obtain frequency domain data including the user signal.

In the embodiment of the present invention, after detecting the effective bandwidth of the user in the frequency domain data corresponding to each RRU, the frequency domain data other than the effective bandwidth of the user in the frequency domain data corresponding to each RRU may be obtained according to the effective bandwidth of the user. In this embodiment of the present invention, the frequency domain data in the frequency domain data corresponding to each RRU may be cleared in the frequency domain data outside the effective bandwidth of the user, so that the band is out-of-band. The interference noise can be removed, so that the frequency domain data including the user signal can be obtained. In the embodiment of the present invention, the frequency domain data including the user signal in step 303 is cleared by the interference noise outside the effective bandwidth of the user, and only the user signal is included. Frequency domain data. Specifically, clearing the frequency domain data other than the effective bandwidth of the user may be implemented by setting the frequency domain data other than the effective bandwidth of the user to zero.

304. Combine the frequency domain data including the user signal according to the channel corresponding to the RRU, and send the combined frequency domain data including the user signal to the baseband processing unit BBU.

In the embodiment of the present invention, the frequency domain data including the user signal is obtained after the frequency domain data other than the effective bandwidth of the user is cleared, and then the frequency domain data including the user signal is combined in the frequency domain, which is related to the prior art. The data merging in the time domain is a completely different technical solution, and the out-of-band interference noise in the frequency domain data combined in the frequency domain has been cleared in the embodiment of the present invention, so in the embodiment of the present invention, There is no problem of noise floor rise in the combined frequency domain data in the frequency domain. Improve the reception performance of the uplink.

In the embodiment of the present invention, the merging of the frequency domain data including the user signal is performed according to the channel corresponding to the RRU, that is, the number of RRUs required for data merging is M, and the number of channels of each RRU is N. Combining the frequency domain data according to the channel corresponding to the RRU means that the N channels of the M RRUs are respectively accumulated M times, and the frequency domain data of the N channels is obtained.

In the embodiment of the present invention, after the data is merged in the frequency domain, the combined frequency domain data including the user signal may be sent to the BBU, and after the BBU receives the combined frequency domain data including the user signal, the present invention In the embodiment, the BBU continues to perform baseband processing. The baseband processing performed by the BBU in the embodiment of the present invention includes: channel estimation and measurement, multi-input multiple-input multiple-output (English full name: MIMO) decoding. , constellation symbol demodulation and channel decoding. Specifically, channel estimation and measurement include estimation of channel frequency domain transmission response, SINR measurement, Doppler measurement, multipath measurement, and the like, and demodulation related parameter measurement; multi-antenna MIMO decoding mainly refers to receiving each antenna The signal is separated; the constellation symbol demodulation refers to the decision of the constellation point to become a bit stream; the channel decoding indicates that the received bit stream is subjected to error correction decoding processing.

According to the description of the present invention, the time domain data sent by each RRU of the multiple RRUs of the common cell is first received, and the time domain data of each RRU is converted into the frequency domain data corresponding to each RRU, and then according to The user signal included in the frequency domain data corresponding to each RRU detects the effective bandwidth of the user in the frequency domain data corresponding to each RRU, and then the frequency value of the frequency domain data corresponding to each RRU is outside the effective bandwidth of the user. The domain data is cleared, and the frequency domain data including the user signal is obtained. Finally, the frequency domain data including the user signal is separately combined according to the channel corresponding to the RRU, and the combined frequency domain data including the user signal is sent to the baseband processing unit BBU. In the embodiment of the present invention, the time domain data of each RRU of the common cell is converted into frequency domain data, so as to perform detection of the effective bandwidth of the user in the frequency domain, which is different from the data in the time domain of the RRU in the prior art. In the embodiment of the present invention, after determining the effective bandwidth of the user in the frequency domain data corresponding to each RRU, the outband noise may be cleared for the frequency domain data corresponding to each RRU according to the effective bandwidth of the user, and only the inclusion is included. The frequency domain data of the user signal is combined to avoid the superposition of noise between different RRUs, avoiding the noise floor rise problem existing in the prior art, thereby improving the signal-to-noise ratio of the RRU's frequency domain data combination and improving the uplink receiving performance. .

As shown in FIG. 4, FIG. 4 is a schematic diagram of an implementation scenario of data merging in a frequency domain of four RRUs of a common cell according to an embodiment of the present invention. Four RRUs (RRU1, RRU2, respectively) The uplink data of RRU3 and RRU4) is combined as an example. Each RRU of RRU1, RRU2, and RRU4 outputs time domain data, the time domain data includes uplink data and noise floor in FIG. 4, and RRU3 outputs noise floor, RRU1, RRU2, and RRU3. And the RRU4 sends the time domain data to the RRU merging unit, and the RRU merging unit performs inverse OFDM symbol generation processing on the time domain data, user effective bandwidth detection, frequency domain data zeroing outside the effective bandwidth, and frequency domain data merging. After the combination of the domain data, the RRU merging unit sends the combined frequency domain data to the BBU, and the BBU performs the baseband processing described in the foregoing embodiment. As shown in FIG. 4, in the embodiment of the present invention, the frequency domain data outside the effective bandwidth of the user is zeroed, thereby reducing the interference of the noise floor on the user signal. Therefore, the combination of the frequency domain data in the embodiment of the present invention does not cause the noise floor. The uplink provides the receiving performance of the uplink. In particular, it can be applied to scenarios where the uplink data that needs to be merged increases when the number of supported RRUs is large, and the problem of bottom noise rise is avoided. It should be noted that, in FIG. 4, the frequency domain data of four RRUs is combined as an example, and the embodiment of the present invention is also applicable to an application scenario in which more RRUs perform frequency domain data combining. In addition, in the embodiment of the present invention, the user signal in the RRU3 shown in FIG. 4 is 0, and the effective bandwidth of the user in the frequency domain data corresponding to the RRU3 is 0. In the embodiment of the present invention, the frequency domain data outside the effective bandwidth of the user is used. The zero-setting specifically refers to that all the frequency domain data corresponding to the RR3 can be cleared, so that the frequency domain data not including the user signal does not participate in the frequency domain data combination, and the influence of the interference noise outside the effective bandwidth of the user is reduced.

Next, another embodiment of a data processing method for multiple RRUs of the common cell of the present invention is described. Referring to FIG. 5, a data processing method for multiple RRUs of a common cell according to another embodiment of the present invention may be specifically Including the following steps:

501. Receive time domain data sent by each RRU of the multiple RRUs of the common cell, and convert time domain data of each RRU into frequency domain data corresponding to each RRU.

The step 501 is similar to the implementation of the step 301 in the foregoing embodiment. For details, refer to the description in the foregoing embodiment, and details are not described herein again.

502. Detect, according to scheduling information of all UEs of the cell, whether the user signal is included in the frequency domain data corresponding to each RRU.

In the embodiment of the present invention, after the frequency domain data corresponding to each RRU is obtained, the frequency domain data corresponding to each RRU is analyzed to determine whether the frequency domain data contains a user signal. Specifically, multiple RRUs are in the Logically belong to the same cell, so the cell parameters such as the number of carriers, the frequency, and the channel configuration of each RRU are the same, and the scheduling information of all the UEs in the same cell to which the multiple RRUs belong together is obtained, according to the scheduling of each UE. Information is detected in the frequency domain data corresponding to each RRU The user signal is included. If each RRU has multiple channels, the multi-channel frequency domain data of multiple channels can be detected to include user data. The scheduling information of each UE can detect the frequency domain corresponding to each RRU. Whether the user signal is included in the data.

503. For detecting frequency domain data including a user signal, use a frequency range occupied by the detected user signal for uplink scheduling transmission as a user effective bandwidth of the frequency domain data, and detect frequency domain data not including the user signal. , the user effective bandwidth of the frequency domain data not including the user signal is set to zero.

In the embodiment of the present invention, in step 502, whether the user signal is included in the frequency domain data corresponding to each RRU is detected, and the user equipment signals are included in the frequency domain data, such as RRU1, RRU2, and RRU4 in FIG. For some frequency domain data, the user does not include a user signal, as shown in RRU3 in FIG. 4, in the frequency domain data including the user signal, the frequency range occupied by the detected user signal for uplink scheduling transmission is used as the frequency domain data. User effective bandwidth. In frequency domain data that does not contain user signals, the effective bandwidth of the user in the frequency domain is set to zero.

It should be noted that, in some embodiments of the present invention, the step 302 in the foregoing embodiment may specifically include the foregoing

steps

502 and 503, and then the specific implementation manners of the step 502 and the step 503 are illustrated. In some embodiments of the present invention, step 502 is configured to detect, according to the scheduling information of all user equipments of the UE, whether the user equipment signal is included in the frequency domain data corresponding to each RRU, and specifically includes the following steps:

A1. Obtain scheduling information of all UEs of the cell from the BBU.

A2. Obtain an uplink pilot signal of each UE of the cell from the frequency domain data corresponding to each RRU according to the scheduling information.

A3. Perform cross-correlation calculation on the uplink pilot signal and the pilot sequence of each UE of the cell to obtain a pilot cross-correlation result;

A4. If the pilot cross-correlation result is greater than a preset pilot threshold, the user signal is detected in the frequency domain data, and if the pilot cross-correlation result is less than or equal to the pilot threshold, the frequency domain data is not detected. Includes user signals.

In step A1, the scheduling information of all the UEs of the same cell to which the multiple RRUs belong to each other is obtained by the interaction with the BBU. For example, when the distributed base station sends the downlink scheduling information to the UE, the RRU combining unit simultaneously sends the BBU to the BBU. Obtain scheduling information of the UE. Then, the uplink pilot signal of each UE of the cell is obtained from the frequency domain data corresponding to each RRU according to the scheduling information of each UE, and then the uplink pilot signal of each UE and the locally generated pilot sequence are performed. The cross-correlation calculation obtains the pilot cross-correlation result. For example, the uplink pilot signal is the sequence [x ₁ , x ₂ , ... x _n ], and the locally generated pilot sequence is the sequence [y ₁ , y ₂ ,... y _n ], then [x ₁ , x ₂ , ... x _n ] and [y ₁ , y ₂ , ... y _n ] can be cross-correlated, and the obtained pilot cross-correlation result is x ₁ y ₁ ^* + x ₂ y ₂ ^* +...+x _n y _n ^* , where y _n ^* represents the conjugate of y _n , and after obtaining the pilot cross-correlation result, determining the magnitude relationship between the pilot cross-correlation result and the preset pilot threshold And determining whether the user signal is included in the frequency domain data according to the judgment result. With reference to the application scenario shown in FIG. 4, the RRU merging unit obtains scheduling information of all UEs in the cell from the BBU, and extracts, for each UE, the uplink pilot signal of the UE from each frequency domain data, and local The generated pilot sequence is subjected to cross-correlation operation to obtain a cross-correlation value. If the value is greater than the preset pilot threshold, the user signal of the UE is included in the frequency domain data, and the effective bandwidth of the user is the scheduling bandwidth of the UE. At this time, the effective bandwidth of the user of each frequency domain data only includes the part of the frequency domain resources occupied by the UE. Otherwise, it indicates that the user signal of the UE is not included in the frequency domain data, and the effective bandwidth of the user in the frequency domain data of the UE is 0. It can be understood that, in the embodiment of the present invention, the specific value of the pilot threshold may be determined by an application scenario, which is not limited herein.

In some embodiments of the present invention, step 502 is configured to detect, according to the scheduling information of all user equipments of the UE, whether the user equipment signal is included in the frequency domain data corresponding to each RRU, and specifically includes the following steps:

B1. Obtain scheduling information of all UEs of the cell from the BBU.

B2. The uplink reference signal receiving power of the frequency domain data corresponding to each RRU of each UE of the cell is measured according to the scheduling information (English name: Reference Signal Receiving Power, English abbreviation: RSRP);

B3. If the uplink RSRP is greater than the preset power threshold, the user signal is detected in the frequency domain data. If the uplink RSRP is less than or equal to the power threshold, the user signal is not included in the frequency domain data.

In the step B1, the scheduling information of all the UEs of the same cell to which the multiple RRUs belong to each other is obtained by the interaction with the BBU. For example, when the distributed base station sends the downlink scheduling information to the UE, the RRU combining unit simultaneously sends the BBU to the BBU. Obtain scheduling information of the UE. Then, according to the scheduling information of each UE, the uplink RSRP of the frequency domain data corresponding to each RRU of each UE of the same cell to which the multiple RRUs are co-located is measured, and after the uplink RSRP is obtained, the uplink RSRP and the preset power threshold are determined. Size value relationship, and according to the judgment result, determine whether the user letter is included in the frequency domain data number. With reference to the application scenario shown in FIG. 4, the RRU merging unit obtains scheduling information of all UEs in the cell from the BBU, and measures, for each UE, the uplink RSRP of the UE in each frequency domain data, if the value is greater than the pre- The power threshold is set, and the user signal of the UE is included in the frequency domain data, and the effective bandwidth of the user is the scheduling bandwidth of the UE, otherwise, the user signal of the UE is not included in the frequency domain data, and the user of the UE in the frequency domain data is valid. The bandwidth is 0. It can be understood that, in the embodiment of the present invention, the specific value of the power threshold may be determined by an application scenario, which is not limited herein.

504. Clear the frequency domain data of the frequency domain data corresponding to each RRU in the frequency domain data other than the effective bandwidth of the user, to obtain frequency domain data including the user signal.

505. Combine the frequency domain data including the user signal according to the channel corresponding to the RRU, and send the combined frequency domain data including the user signal to the baseband processing unit BBU.

The

steps

504 and 505 are similar to the implementations of the

steps

303 and 304 in the foregoing embodiment. For details, refer to the description in the foregoing embodiment, and details are not described herein again.

According to the description of the present invention, the time domain data sent by each RRU of the multiple RRUs of the common cell is first received, and the time domain data of each RRU is converted into the frequency domain data corresponding to each RRU, and then according to The scheduling information of all the UEs of the cell detects whether the user equipment signal is included in the frequency domain data corresponding to each RRU, and detects the effective bandwidth of the user, and then the frequency value of the frequency domain data corresponding to each RRU is outside the effective bandwidth of the user. The domain data is cleared, and the frequency domain data including the user signal is obtained. Finally, the frequency domain data including the user signal is separately combined according to the channel corresponding to the RRU, and the combined frequency domain data including the user signal is sent to the baseband processing unit BBU. In the embodiment of the present invention, the time domain data of each RRU of the common cell is converted into frequency domain data, so as to perform detection of the effective bandwidth of the user in the frequency domain, which is different from the data in the time domain of the RRU in the prior art. In the embodiment of the present invention, after determining the effective bandwidth of the user in the frequency domain data corresponding to each RRU, the outband noise may be cleared for the frequency domain data corresponding to each RRU according to the effective bandwidth of the user, and only the inclusion is included. The frequency domain data of the user signal is combined to avoid the superposition of noise between different RRUs, avoiding the noise floor rise problem existing in the prior art, thereby improving the signal-to-noise ratio of the RRU's frequency domain data combination and improving the uplink receiving performance. .

Next, another embodiment of a data processing method for multiple RRUs of the common cell of the present invention is described. In this embodiment, each RRU includes multiple channels, for example, each RRU includes N channels, each The frequency domain data corresponding to the RRUs includes: N-channel frequency domain data corresponding to N channels, and N is a natural number greater than or equal to 2. Referring to FIG. 6, another embodiment of the present invention provides The data processing method of multiple RRUs of the cell may specifically include the following steps:

601. Receive time domain data sent by each RRU of the multiple RRUs of the common cell, and convert time domain data of each RRU into frequency domain data corresponding to each RRU.

The step 601 is similar to the implementation of the step 301 in the foregoing embodiment. For details, refer to the description in the foregoing embodiment, and details are not described herein again. After step 601 is completed, step 602 and step 603 are triggered to be sequentially executed.

602. Perform cross-correlation calculation on any two frequency domain data corresponding to the same RRU in the N frequency domain data to obtain a data cross correlation result.

603. If the data cross-correlation result is greater than a preset data threshold, the user signal is scheduled in the coverage of the RRU corresponding to any two frequency domain data, and the maximum transmission bandwidth configured by the system is valid as the user of any two frequency domain data. Bandwidth; if the cross-correlation result is less than or equal to the correlation threshold, no user signal is scheduled within the coverage of the RRU corresponding to any two frequency domain data, and the effective bandwidth of the user of any two frequency domain data is set to zero.

steps

602 and 603, and then the specific implementation manners of the

steps

602 and 603 are exemplified.

In the embodiment of the present invention, after obtaining the frequency domain data corresponding to each RRU, if there are multiple channels corresponding to each RRU, any two channels in the same RRU may be used in multiple frequency domain data of multiple channels. The frequency domain data is subjected to cross-correlation calculation to obtain data cross-correlation results. If the number of channels included in the same RRU is greater than two, the two-frequency domain data in the N-channel frequency domain data corresponding to the same RRU needs to be cross-correlated, and then the step 603 is triggered to determine the data cross-correlation result. The relationship between the value and the preset data threshold, and determining the effective bandwidth of the user of the frequency domain data according to the judgment result. With reference to the application scenario shown in FIG. 4, as an example, if each RRU includes more than two channels, any two frequency domain data of the same RRU may be cross-correlated to obtain a cross-correlation value. If the data threshold is greater than the preset data threshold, the UE is scheduled to be in the RRU coverage area, that is, the user signal is sent in the RRU coverage area, and the user effective bandwidth of each frequency domain data of the RRU is set as the system bandwidth. Otherwise, Indicates that there is no UE scheduling in the coverage of the RRU, and sets the user effective bandwidth of each frequency domain data of the RRU to zero. Different from the implementation manner of the foregoing embodiment, in this embodiment, the scheduling information of the UE is not needed, and the detection is blind detection, and it is possible to detect whether there is UE scheduling in the frequency domain data, and use the system bandwidth as the effective bandwidth of the user. Where system bandwidth refers to The maximum transmission bandwidth of the system configuration on a certain carrier frequency can be expressed in MHz or (English full name: Resource Block, English abbreviation: RB). For example, the system bandwidth of LTE can be configured to 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz. Or 20MHz, corresponding to 6RB, 15RB, 25RB, 50RB, 75RB and 100RB, respectively. It can be understood that, in the embodiment of the present invention, the specific value of the data threshold may be determined by an application scenario, which is not limited herein.

604. Clear the frequency domain data of the frequency domain data corresponding to each RRU in the frequency domain data other than the effective bandwidth of the user, to obtain frequency domain data including the user signal.

605. Combine the frequency domain data including the user signal according to the channel corresponding to the RRU, and send the combined frequency domain data including the user signal to the baseband processing unit BBU.

The

steps

604 and 605 are similar to the implementations of the

steps

According to the description of the present invention, the time domain data sent by each RRU of the multiple RRUs of the common cell is respectively received, and the time domain data of each RRU is converted into the frequency domain data corresponding to each RRU, and then passed. Cross-correlation calculation is performed on any two frequency domain data of the same RRU, and the effective bandwidth of the user is obtained by determining the data gate limit, and then the frequency domain data in the frequency domain data corresponding to each RRU is cleared in the frequency domain data other than the effective bandwidth of the user. The frequency domain data including the user signal is obtained, and the frequency domain data including the user signal is separately combined according to the channel corresponding to the RRU, and the combined frequency domain data including the user signal is sent to the baseband processing unit BBU. In the embodiment of the present invention, the time domain data of each RRU of the common cell is converted into frequency domain data, so as to perform detection of the effective bandwidth of the user in the frequency domain, which is different from the data in the time domain of the RRU in the prior art. In the embodiment of the present invention, after determining the effective bandwidth of the user in the frequency domain data corresponding to each RRU, the outband noise may be cleared for the frequency domain data corresponding to each RRU according to the effective bandwidth of the user, and only the inclusion is included. The frequency domain data of the user signal is combined to avoid the superposition of noise between different RRUs, avoiding the noise floor rise problem existing in the prior art, thereby improving the signal-to-noise ratio of the RRU's frequency domain data combination and improving the uplink receiving performance. .

Next, another embodiment of a data processing method for multiple RRUs of the common cell of the present invention is described. Referring to FIG. 7 , a data processing method for multiple RRUs of a common cell according to another embodiment of the present invention may be specifically Including the following steps:

701. Receive time domain data sent by each RRU of the multiple RRUs of the common cell, and convert the time domain data of each RRU into frequency domain data corresponding to each RRU.

The step 701 is similar to the implementation of the step 301 in the foregoing embodiment. For details, refer to the description in the foregoing embodiment, and details are not described herein again. After step 701 is completed, step 702 and step 703 and step 704 are triggered to be sequentially executed.

702. Count the total energy of all subcarriers in each RB in the frequency domain data corresponding to each RRU.

703. Determine that an RB whose total energy of all subcarriers in the frequency domain data is greater than an energy threshold is within a user effective bandwidth of the frequency domain data, and determine that an RB whose total energy of all subcarriers in the frequency domain data is less than or equal to an energy threshold is in the RB. The frequency domain data is outside the user's effective bandwidth.

704. Accumulate RBs whose total energy of all subcarriers in the frequency domain data is greater than an energy threshold, to obtain a user effective bandwidth of the frequency domain data.

It should be noted that, in some embodiments of the present invention, the step 302 in the foregoing embodiment may specifically include the foregoing step 702, step 703, and step 704, and then specific implementation manners of step 702, step 703, and step 704. Give an example.

In the embodiment of the present invention, after obtaining the frequency domain data corresponding to each RRU, the total energy of all the subcarriers in each RB of each frequency domain data corresponding to each RRU is sequentially counted, if each RRU corresponds to multiple channels. Then, the total energy of all the subcarriers in each RB of the multiple channel frequency domain data may be determined, and then according to the method of determining the total energy of all the subcarriers in step 703, it is determined whether an RB is in the effective bandwidth of the user. The internal mode, and determining the effective bandwidth of the user of the frequency domain data according to the judgment result. With reference to the application scenario shown in FIG. 4, for example, for each frequency domain data, the total energy of all subcarriers in each RB is sequentially counted. If the energy of a certain RB is greater than a preset energy threshold, it is indicated in the There is UE scheduling in the RB, and the RB is within the effective bandwidth of the user. Otherwise, the RB is outside the effective bandwidth of the user. By traversing all the RBs in the system bandwidth according to the above method, the effective bandwidth of the user of each frequency domain data can be determined. It can be understood that, in the embodiment of the present invention, the specific value of the energy threshold may be determined by an application scenario, which is not limited herein.

705. Clear the frequency domain data of the frequency domain data corresponding to each RRU in the frequency domain data other than the effective bandwidth of the user, to obtain frequency domain data including the user signal.

706. The frequency domain data including the user signal is separately combined according to the channel corresponding to the RRU, and the combined frequency domain data including the user signal is sent to the baseband processing unit BBU.

The

steps

705 and 706 are similar to the implementations of the

steps

According to the description of the present invention, the time domain data sent by each RRU of the multiple RRUs of the common cell is first received, and the time domain data of each RRU is converted into the frequency domain data corresponding to each RRU, and then according to The relationship between the total energy of all subcarriers in each RB and the energy threshold in the frequency domain data corresponding to each RRU, and obtains a continuous number of RBs carrying energy as the user effective bandwidth of the frequency domain data, and then each RRU The frequency domain data in the corresponding frequency domain data is cleared in the frequency domain data outside the effective bandwidth of the user, and the frequency domain data including the user signal is obtained, and finally the frequency domain data including the user signal is separately combined according to the channel corresponding to the RRU, and then merged. The frequency domain data containing the user signal is sent to the baseband processing unit BBU. In the embodiment of the present invention, the time domain data of each RRU of the common cell is converted into frequency domain data, so as to perform detection of the effective bandwidth of the user in the frequency domain, which is different from the data in the time domain of the RRU in the prior art. In the embodiment of the present invention, after determining the effective bandwidth of the user in the frequency domain data corresponding to each RRU, the outband noise may be cleared for the frequency domain data corresponding to each RRU according to the effective bandwidth of the user, and only the inclusion is included. The frequency domain data of the user signal is combined to avoid the superposition of noise between different RRUs, avoiding the noise floor rise problem existing in the prior art, thereby improving the signal-to-noise ratio of the RRU's frequency domain data combination and improving the uplink receiving performance. .

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In order to facilitate the implementation of the above solution of the embodiments of the present invention, related devices for implementing the above solutions are also provided below.

Referring to FIG. 8-a, a data processing apparatus 800 for multiple RRUs of a common cell according to an embodiment of the present invention may include: a time-frequency conversion module 801, a bandwidth detection module 802, a data clearing module 803, and a frequency domain. Merging module 804, wherein

The time-frequency conversion module 801 is configured to respectively receive time domain data sent by each RRU of the multiple RRUs of the common cell, and convert time domain data of each RRU into frequency domain data corresponding to each RRU;

The bandwidth detecting module 802 is configured to detect, according to the user signal included in the frequency domain data corresponding to each RRU, the effective bandwidth of the user in the frequency domain data corresponding to each RRU;

The data clearing module 803 is configured to: clear frequency domain data of the frequency domain data corresponding to each RRU in the frequency domain data other than the effective bandwidth of the user, to obtain frequency domain data including the user signal;

The frequency domain merging module 804 is configured to separately combine the frequency domain data including the user signal according to the channel corresponding to the RRU, and send the combined frequency domain data including the user signal to the baseband processing unit BBU.

In some embodiments of the present invention, as shown in FIG. 8-b, the bandwidth detecting module 802 may include:

The user signal detecting unit 8021 is configured to detect, according to scheduling information of all user equipments UE of the cell, whether the user signal is included in the frequency domain data corresponding to each RRU.

The first effective bandwidth obtaining unit 8022 is configured to, when detecting the frequency domain data including the user signal, use a frequency range occupied by the detected user signal for uplink scheduling transmission as a user effective bandwidth of the frequency domain data. For detecting the frequency domain data not including the user signal, the user effective bandwidth of the frequency domain data not including the user signal is set to zero.

Further, in some embodiments of the present invention, as shown in FIG. 8-c, the user signal detecting unit 8021 includes:

The scheduling information acquiring unit 80211 is configured to acquire scheduling information of all UEs of the cell from the BBU;

The pilot signal obtaining unit 80212 is configured to obtain an uplink pilot signal of each UE of the cell from the frequency domain data corresponding to each RRU according to the scheduling information.

a first cross-correlation calculation unit 80213, configured to perform cross-correlation calculation according to an uplink pilot signal and a pilot sequence of each UE of the cell, to obtain a pilot cross-correlation result;

The first analyzing unit 80214 is configured to detect, when the pilot cross-correlation result is greater than a preset pilot threshold, the user signal in the frequency domain data, if the pilot cross-correlation result is less than or equal to Referring to the pilot threshold, it is detected in the frequency domain data that the user signal is not included.

Further, in some embodiments of the present invention, as shown in FIG. 8-d, the user signal detecting unit 8021 includes:

The measuring unit 80215 is configured to measure, according to the scheduling information, an uplink reference signal received power RSRP of each UE of the cell in the frequency domain data corresponding to each RRU;

The second analyzing unit 80216 is configured to detect, when the uplink RSRP is greater than a preset power threshold, that the user signal is detected in the frequency domain data, and if the uplink RSRP is less than or equal to the power threshold, It is detected in the domain data that the user signal is not included.

In some embodiments of the present invention, if each RRU includes N channels, the frequency domain data corresponding to each RRU includes: N-channel frequency domain data corresponding to the N channels, where N is greater than or For a natural number equal to 2, as shown in FIG. 8-e, the bandwidth detecting module 802 may include:

The second cross-correlation calculation unit 8023 is configured to perform cross-correlation calculation on any two frequency domain data corresponding to the same RRU in the N-channel frequency domain data to obtain a data cross-correlation result;

The second effective bandwidth obtaining unit 8024 is configured to: if the data cross-correlation result is greater than a preset data threshold, the user signal is scheduled to be within the coverage of the RRU corresponding to the arbitrary two-way frequency domain data, and the system is configured to be the largest. The transmission bandwidth is used as the user effective bandwidth of the arbitrary two-way frequency domain data; if the cross-correlation result is less than or equal to the correlation threshold, the user signal of the RRU corresponding to the arbitrary two-way frequency domain data is not scheduled. The user effective bandwidth of any two of the frequency domain data is set to zero.

In some embodiments of the present invention, as shown in FIG. 8-f, the bandwidth detection module 802 may include:

The energy statistic unit 8025 is configured to sequentially count the total energy of all subcarriers in each resource block RB in the frequency domain data corresponding to each RRU;

The resource block detecting unit 8026 is configured to determine that the RB whose total energy of all subcarriers in the frequency domain data is greater than the energy threshold is within the user effective bandwidth of the frequency domain data, and determine that the total energy of all subcarriers in the frequency domain data is less than or equal to The RB of the energy threshold is outside the effective bandwidth of the user of the frequency domain data;

The third effective bandwidth obtaining unit 8027 is configured to accumulate RBs whose total energy of all subcarriers in the frequency domain data is greater than an energy threshold, to obtain a user effective bandwidth of the frequency domain data.

According to the description of the present invention, the time domain data sent by each RRU of the multiple RRUs of the common cell is first received, and the time domain data of each RRU is converted into the frequency domain data corresponding to each RRU, and then according to The user signal included in the frequency domain data corresponding to each RRU detects the effective bandwidth of the user in the frequency domain data corresponding to each RRU, and then the frequency value of the frequency domain data corresponding to each RRU is outside the effective bandwidth of the user. The domain data is cleared, and the frequency domain data including the user signal is obtained. Finally, the frequency domain data including the user signal is separately combined according to the channel corresponding to the RRU. The combined frequency domain data including the user signal is transmitted to the baseband processing unit BBU. In the embodiment of the present invention, the time domain data of each RRU of the common cell is converted into frequency domain data, so as to perform detection of the effective bandwidth of the user in the frequency domain, which is different from the data in the time domain of the RRU in the prior art. In the embodiment of the present invention, after determining the effective bandwidth of the user in the frequency domain data corresponding to each RRU, the outband noise may be cleared for the frequency domain data corresponding to each RRU according to the effective bandwidth of the user, and only the inclusion is included. The frequency domain data of the user signal is combined to avoid the superposition of noise between different RRUs, avoiding the noise floor rise problem existing in the prior art, thereby improving the signal-to-noise ratio of the RRU's frequency domain data combination and improving the uplink receiving performance. .

It should be noted that the information interaction between the modules/units of the foregoing device, the execution process, and the like are based on the same concept as the method embodiment of the present invention, and the technical effects thereof are the same as the embodiment of the method of the present invention. Referring to the description in the foregoing method embodiments of the present invention, details are not described herein again.

The embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium stores a program, and the program executes some or all of the steps described in the foregoing method embodiments.

Next, the data processing apparatus of the multiple RRUs of the common cell provided by the embodiment of the present invention is introduced. Referring to FIG. 9, the data processing apparatus 900 of the multiple RRUs of the common cell includes:

The input device 901, the output device 902, the processor 903, and the memory 904 (the number of the processors 903 in the data processing device 900 of the plurality of RRUs of the common cell may be one or more, and one processor in FIG. 9 is taken as an example) . In some embodiments of the present invention, the input device 901, the output device 902, the processor 903, and the memory 904 may be connected by a bus or other means, wherein the bus connection is taken as an example in FIG.

The processor 903 is configured to perform the following steps:

Combining the frequency domain data including the user signal according to the channel corresponding to the RRU, respectively The combined frequency domain data containing the user signal is sent to the baseband processing unit BBU.

In some embodiments of the present invention, the processor 903 is specifically configured to perform the following steps:

Obtaining scheduling information of all UEs of the cell from the BBU;

In some embodiments of the present invention, if each RRU includes N channels, the frequency domain data corresponding to each RRU includes: N-channel frequency domain data corresponding to the N channels, where N is greater than or A natural number equal to 2, the processor 903 is specifically configured to perform the following steps:

Performing cross-correlation calculation on any two frequency domain data corresponding to the same RRU in the N frequency domain data to obtain a data cross correlation result;

If the data cross-correlation result is greater than a preset data threshold, the any two frequency domain data pairs A user signal is scheduled within the coverage of the RRU, and the maximum transmission bandwidth configured by the system is used as the effective bandwidth of the user of the arbitrary two-way frequency domain data;

The processor 903 is specifically configured to perform the following steps:

It should be further noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be Physical unit, which can be located in one place, or it can be distributed Go to multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, in the drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and specifically, one or more communication buses or signal lines can be realized. Those of ordinary skill in the art can understand and implement without any creative effort.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general hardware, and of course, dedicated hardware, dedicated CPU, dedicated memory, dedicated memory, Special components and so on. In general, functions performed by computer programs can be easily implemented with the corresponding hardware, and the specific hardware structure used to implement the same function can be various, such as analog circuits, digital circuits, or dedicated circuits. Circuits, etc. However, for the purposes of the present invention, software program implementation is a better implementation in more cases. Based on the understanding, the technical solution of the present invention, which is essential or contributes to the prior art, can be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer. , U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., including a number of instructions to make a computer device (may be A personal computer, server, or network device, etc.) performs the methods described in various embodiments of the present invention.

In conclusion, the above embodiments are only used to explain the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still The technical solutions described in the above embodiments are modified, or equivalent to some of the technical features are included; and the modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A data processing method for a plurality of radio remote units RRU of a common cell, comprising:

Receiving the time domain data sent by each RRU of the multiple RRUs of the common cell, and converting the time domain data of each RRU into the frequency domain data corresponding to each RRU;

And detecting, according to the user signal included in the frequency domain data corresponding to each RRU, a user effective bandwidth in the frequency domain data corresponding to each RRU;

Clearing, in the frequency domain data corresponding to each RRU, frequency domain data outside the effective bandwidth of the user, to obtain frequency domain data including the user signal;

The frequency domain data including the user signal is separately combined according to the channel corresponding to the RRU, and the combined frequency domain data including the user signal is sent to the baseband processing unit BBU.
The method according to claim 1, wherein the detecting, according to the user signal included in the frequency domain data corresponding to each RRU, the effective bandwidth of the user in the frequency domain data corresponding to each RRU, including :

Detecting whether the user signal is included in the frequency domain data corresponding to each RRU according to scheduling information of all user equipments of the cell;

For detecting the frequency domain data including the user signal, the frequency range occupied by the detected user signal for uplink scheduling transmission is used as the user effective bandwidth of the frequency domain data;

For detecting frequency domain data not including the user signal, the user effective bandwidth of the frequency domain data not including the user signal is set to zero.
The method according to claim 2, wherein the detecting, according to the scheduling information of all user equipments UE of the cell, whether the user signal is included in the frequency domain data corresponding to each RRU, includes:

Obtaining scheduling information of all UEs of the cell from the BBU;

Obtaining an uplink pilot signal of each UE of the cell from the frequency domain data corresponding to each RRU according to the scheduling information;

Performing cross-correlation calculation on the uplink pilot signal and the pilot sequence of each UE of the cell to obtain a pilot cross-correlation result;

If the pilot cross-correlation result is greater than a preset pilot threshold, detecting that the user signal is included in the frequency domain data, and if the pilot cross-correlation result is less than or equal to the pilot threshold, then the frequency is Number of domains It is detected that the user signal is not included.
The method according to claim 2, wherein the detecting, according to the scheduling information of all user equipments UE of the cell, whether the user signal is included in the frequency domain data corresponding to each RRU, includes:

Obtaining scheduling information of all UEs of the cell from the BBU;

And measuring, according to the scheduling information, an uplink reference signal received power RSRP of each UE of the cell in the frequency domain data corresponding to each RRU;

If the uplink RSRP is greater than a preset power threshold, detecting that the user signal is included in the frequency domain data, if the uplink RSRP is less than or equal to the power threshold, detecting that the frequency domain data is not included User signal.
The method according to claim 1, wherein if each RRU comprises N channels, the frequency domain data corresponding to each RRU comprises: N-channel frequency domain data corresponding to the N channels, N is a natural number greater than or equal to 2,

And detecting, according to the user signal included in the frequency domain data corresponding to each RRU, the effective bandwidth of the user in the frequency domain data corresponding to each RRU, including:

Performing cross-correlation calculation on any two frequency domain data corresponding to the same RRU in the N frequency domain data to obtain a data cross correlation result;

If the data cross-correlation result is greater than the preset data threshold, the user signal is scheduled in the coverage of the RRU corresponding to the two-way frequency domain data, and the maximum transmission bandwidth configured by the system is used as the arbitrary two-way frequency domain. User effective bandwidth of data;

If the cross-correlation result is less than or equal to the correlation threshold, the user signal is not scheduled within the coverage of the RRU corresponding to the any two-way frequency domain data, and the effective bandwidth of the user of the two-way frequency domain data is set to zero.
The method according to claim 1, wherein the detecting, according to the user signal included in the frequency domain data corresponding to each RRU, the effective bandwidth of the user in the frequency domain data corresponding to each RRU, including :

And sequentially counting the total energy of all subcarriers in each resource block RB in the frequency domain data corresponding to each RRU;

Determining that the total energy of all subcarriers in the frequency domain data is greater than the energy threshold is within the user effective bandwidth of the frequency domain data, and determining that the total energy of all subcarriers in the frequency domain data is less than or equal to the energy The RB of the quantity threshold is outside the effective bandwidth of the user of the frequency domain data;

The RBs whose total energy of all subcarriers in the frequency domain data is greater than the energy threshold are accumulated, and the effective bandwidth of the user of the frequency domain data is obtained.
A data processing device for a plurality of remote radio unit RRUs of a common cell, comprising:

a time-frequency conversion module, configured to respectively receive time domain data sent by each RRU of the plurality of RRUs of the common cell, and convert time domain data of each RRU into frequency domain data corresponding to each RRU;

a bandwidth detecting module, configured to detect, according to a user signal included in the frequency domain data corresponding to each RRU, a user effective bandwidth in the frequency domain data corresponding to each RRU;

a data clearing module, configured to: clear frequency domain data of frequency domain data corresponding to each RRU in the frequency domain data other than the effective bandwidth of the user, to obtain frequency domain data including the user signal;

The frequency domain merging module is configured to combine the frequency domain data including the user signal according to the channel corresponding to the RRU, and send the combined frequency domain data including the user signal to the baseband processing unit BBU.
The device according to claim 7, wherein the bandwidth detecting module comprises:

a user signal detecting unit, configured to detect, according to scheduling information of all user equipments UE of the cell, whether the user signal is included in frequency domain data corresponding to each RRU;

a first effective bandwidth acquiring unit, configured to: for detecting frequency domain data including the user signal, use a frequency range occupied by the detected user signal for uplink scheduling transmission as a user effective bandwidth of the frequency domain data; For detecting frequency domain data not including the user signal, the user effective bandwidth of the frequency domain data not including the user signal is set to zero.
The device according to claim 8, wherein the user signal detecting unit comprises:

a scheduling information acquiring unit, configured to acquire scheduling information of all UEs of the cell from the BBU;

a pilot signal acquiring unit, configured to acquire, according to the scheduling information, an uplink pilot signal of each UE of the cell from the frequency domain data corresponding to each RRU;

a first cross-correlation calculation unit, configured to perform cross-correlation calculation according to an uplink pilot signal and a pilot sequence of each UE of the cell, to obtain a pilot cross-correlation result;

a first analyzing unit, configured to: if the pilot cross-correlation result is greater than a preset pilot threshold, The user signal is detected in the domain data, and if the pilot cross-correlation result is less than or equal to the pilot threshold, detecting that the user signal is not included in the frequency domain data.
The device according to claim 8, wherein the user signal detecting unit comprises:

a scheduling information acquiring unit, configured to acquire scheduling information of all UEs of the cell from the BBU;

a measuring unit, configured to measure, according to the scheduling information, an uplink reference signal received power RSRP of each UE of the cell in the frequency domain data corresponding to each RRU;

a second analyzing unit, configured to: if the uplink RSRP is greater than a preset power threshold, detecting that the user signal is included in the frequency domain data, and if the uplink RSRP is less than or equal to the power threshold, in the frequency domain It is detected in the data that the user signal is not included.
The apparatus according to claim 7, wherein if each of the RRUs comprises N channels, the frequency domain data corresponding to each RRU comprises: N-channel frequency domain data corresponding to the N channels, N is a natural number greater than or equal to 2,

The bandwidth detection module includes:

a second cross-correlation calculation unit, configured to perform cross-correlation calculation on any two frequency domain data corresponding to the same RRU in the N-channel frequency domain data, to obtain a data cross-correlation result;

a second effective bandwidth acquiring unit, configured to: if the data cross-correlation result is greater than a preset data threshold, the user signal is scheduled to be within the coverage of the RRU corresponding to the arbitrary two-way frequency domain data, and the maximum transmission of the system configuration is configured. The bandwidth is used as the user effective bandwidth of the arbitrary two-way frequency domain data; if the cross-correlation result is less than or equal to the correlation threshold, no user signal is scheduled within the coverage of the RRU corresponding to the arbitrary two-way frequency domain data. The user effective bandwidth of any two of the frequency domain data is set to zero.
The device according to claim 7, wherein the bandwidth detecting module comprises:

An energy statistics unit, configured to sequentially count the total energy of all subcarriers in each resource block RB in the frequency domain data corresponding to each RRU;

a resource block detecting unit, configured to determine that an RB whose total energy of all subcarriers in the frequency domain data is greater than an energy threshold is within a user effective bandwidth of the frequency domain data, and determine that a total energy of all subcarriers in the frequency domain data is less than or equal to The RB of the energy threshold is outside the effective bandwidth of the user of the frequency domain data;

a third effective bandwidth acquiring unit, configured to use a total energy of all subcarriers in the frequency domain data to be greater than energy The RB of the threshold is accumulated to obtain the effective bandwidth of the user of the frequency domain data.