CN103795448B - Method of adjustment, data processing method, base station equipment and the system of interface rate - Google Patents

Abstract

The invention discloses a kind of method of adjustment of interface rate, data processing method, base station equipment and system.Pass through scheme disclosed by the invention, first base station equipment is no longer to transmit each circuit-switched data by its Ir interfaces full dose between the second base station equipment, but benchmark is used as using a certain circuit-switched data, residual quantity transmission is carried out to other at least circuit-switched datas, so as to the mode transmitted relative to full dose, the actual data transfer amount of Ir interfaces is greatly reduced.

Description

Interface rate adjustment method, data processing method, base station equipment and system

technical field

The invention relates to the field of communication technology, in particular to an adjustment of interface rate of base station equipment, a data processing method, base station equipment and a system.

Background technique

The wireless side of cellular network equipment is mainly composed of RNC, base station and antenna. At present, most of the base stations adopt the form of distributed base stations. The baseband processing equipment (BBU, Building base Band Unit) responsible for baseband processing and the remote radio equipment ( RRU, Radio Remote Unit) consists of two parts, and the two are connected through an optical fiber interface (hereinafter referred to as Ir interface), as shown in Figure 1.

Specifically, the functional units included in the BBU and the RRU are shown in FIG. 2 . Among them, BBU mainly includes Lub interface board unit, main control unit, baseband processing unit, clock processing unit, etc., while RRU mainly includes digital intermediate frequency unit, transceiver unit (TRX) unit, power amplifier and filter unit. The interface between the BBU and the RRU is an Ir interface.

Since the baseband signal sampling data of all channels (antennas) are transmitted on the Ir interface, a higher carrying rate is required. The bearer rate is related to factors such as system sampling rate, number of carriers, number of antennas, and quantization bit width. For a TD-LTE system with 8 antennas and 20MHz bandwidth, the specific calculation formula for the bearer rate is as follows:

2 (IQ) * sampling rate * number of carriers * number of antennas * bit width * (10B/8B encoding)

According to the above formula, if the sampling rate is 30.72M, the carrier rate is 1, the number of antennas is 8, and the bit width is 16, then there are 2*30.72M*1*8*16*10/8=9.8304Gbps, that is, 8 antennas The bearer rate requirement of the Ir interface of the 20MHz bandwidth TD-LTE system is 9.8304Gbps.

See Table 1 for the Ir bandwidth requirements calculated in a similar manner.

Table 1:

TD-LTE bandwidth number of antennas Bearer rate of the Ir interface (unit: Gbps) 2*20M 8 19.6608 20M 8 9.8304 2*20M 2 4.9152 20M 2 2.4576

According to the above table, it can be seen that in the smart antenna LTE system (8 antennas), the bearer rate of the Ir interface is relatively high, and an optical module with a rate of 10G is required (that is, an optical module with a bearer rate of 10G, hereinafter referred to as 10G optical module ) bearer, for two 20M bandwidth systems, two 10G optical modules are required to carry. This leads to two problems:

1. The cost of an optical module is closely related to its rate level. The price of a 10G optical module is about 3 to 5 times higher than that of a 5G/6G optical module, resulting in an increase in equipment costs;

2. It is difficult to realize multi-stage RRU serial cascading. When multiple RRUs are serially cascaded, the carrying rate of each Ir interface needs to be doubled (because the data of multiple RRUs needs to be carried at the same time). As shown in Figure 3, it is a schematic diagram of four RRUs, that is, the serial cascade connection of RRU1~RRU4. In Figure 3, it is assumed that the Ir interface between RRU1 and RRU2 is a level-1 Ir interface, and the Ir interface between RRU2 and RRU3 is The level 2 Ir interface and the Ir interface between RRU3 and RRU4 are level 3 Ir interfaces, so the bearer rate of the level 3 Ir interface is much higher than that of the level 2 Ir interface, and the bearer rate of the level 2 Ir interface is much higher than that of the level 1 Ir interface load rate. Moreover, the bearer rate of the level 3 Ir interface generally exceeds 10 Gbps.

At present, the optical modules exceeding the 10G speed level are not yet mature, so in the actual TD-LTE, 10G optical modules will still be used. However, it can be known from the above question 2 that the 10G optical module can no longer meet the requirements of this scenario, so it is necessary to reduce the amount of data transmitted through each level of Ir interface per unit time to ensure that the 10G optical module can meet the carrying rate of each level of Ir interface need.

Contents of the invention

Embodiments of the present invention provide a method for adjusting the interface rate of base station equipment, base station equipment and a system, so as to reduce the data transmission volume of the Ir interface.

The invention also provides a data processing method and another base station equipment.

Embodiments of the present invention adopt the following technical solutions:

A method for adjusting the interface rate of a base station device, comprising: a first base station device obtains multi-channel data; according to preset antenna shaping weights, weight calculation is performed on each data channel respectively, and corresponding calculation results of each weight value are obtained ; Determine at least one benchmark weight calculation result from the obtained weight calculation results, and use at least one other weight calculation result except the benchmark weight calculation results as the weight calculation results to be differentiated, and determine the pending difference The difference between the weight calculation result and the reference weight calculation result specified from the determined reference weight calculation results; other weight calculation results than the calculation results, to obtain multi-channel quantization results, and send the quantization results to the second base station device through the Ir interface.

A data processing method, comprising: a second base station device receiving a plurality of quantization results respectively corresponding to multiple channels of data sent by a first base station device through an Ir interface; determining a benchmark quantization result; and converting, according to the benchmark quantization result and the data restoration rule, other quantization results included in the plurality of quantization results except the benchmark quantization result into corresponding weight value calculation results.

A base station device, comprising: a data obtaining unit, for obtaining multi-channel data; a weight calculation unit, for performing weight calculation on each channel of data obtained by the data obtaining unit according to a preset antenna shaping weight , to obtain the corresponding weight calculation results; the reference determination unit is used to determine at least one reference weight calculation result from the weight calculation results calculated by the weight calculation unit; the difference determination unit is used to obtain by the data acquisition unit At least one other weight calculation result other than the reference weight calculation result is used as the weight calculation result to be differentiated, and the weight calculation result to be differentiated and the reference weight specified in the reference weight calculation result determined by the reference determination unit are determined. The difference value of the value calculation result; the quantization result determination unit is used to divide the reference weight calculation result obtained by the data acquisition unit and Wait for other weight calculation results than the difference weight calculation results to obtain multi-channel quantization results; the sending unit is used to send the quantization results obtained by the quantization result determination unit to other base station equipment through the Ir interface.

A base station device, comprising: a receiving unit, configured to receive a plurality of quantization results respectively corresponding to multiple channels of data sent by other base station devices through an Ir interface; a determining unit, configured to receive from the receiving unit according to a preset data restoration rule Determine the benchmark quantization result among the multiple quantization results; the conversion unit is configured to, according to the benchmark quantization result determined by the determining unit and the data restoration rule, divide the benchmark quantization contained in the multiple quantization results received by the receiving unit Other quantitative results other than the result are converted into corresponding weight calculation results.

A system for adjusting the interface rate of base station equipment, including a first base station equipment and a second base station equipment, wherein:

The first base station equipment is used to obtain multi-channel data; according to the preset antenna shaping weight, perform weight calculation on each channel of data to obtain corresponding weight calculation results; from the obtained weight calculation results Determine at least one benchmark weight calculation result, and use at least one other weight calculation result except the benchmark weight calculation result as the weight calculation result to be differentiated, and determine the difference between the weight calculation result to be differentiated and the determined benchmark The difference between the benchmark weight calculation results specified in the weight calculation results; based on the benchmark weight calculation results, the difference, and other weight calculation results obtained except for the benchmark weight calculation results and the weight calculation results to be differentiated , obtaining multi-channel quantization results, and sending the quantization results to the second base station device through the Ir interface;

The second base station device is configured to receive a plurality of quantization results respectively corresponding to multiple channels of data sent by the first base station device through the Ir interface; determine a benchmark quantization result from the plurality of quantization results according to a preset data restoration rule; And according to the reference quantization result and the data recovery rule, the other quantization results included in the plurality of quantization results except the reference quantization result are respectively converted into weight calculation results of corresponding antennas.

The beneficial effects of the embodiments of the present invention are as follows:

With the above technical solution, the first base station equipment no longer transmits all data in full through the Ir interface between it and the second base station equipment, but uses a certain channel of data as a reference to perform differential transmission of at least one other channel of data, thereby Compared with the full-volume transmission method, the actual data transmission volume of the Ir interface is greatly reduced.

Description of drawings

FIG. 1 is a schematic diagram of a wireless side of a cellular network device;

Figure 2 is a schematic diagram of functional units included in the BBU and RRU;

Fig. 3 is the serial cascade schematic diagram of RRU;

Fig. 4 is the schematic diagram of the processing process of the data of 8 antennas in the prior art;

Fig. 5 is a schematic diagram of the corresponding relationship between antenna shaping weights and antennas;

Fig. 6 is a comparative schematic diagram of the transmission bandwidth requirements of the Ir interface between the prior art and the present invention;

FIG. 7 is a schematic flowchart of a method for adjusting the interface rate of base station equipment provided by an embodiment of the present invention;

FIG. 8 is a schematic flowchart of a data processing method provided by an embodiment of the present invention;

Fig. 9a is a schematic structural diagram of a system for implementing Embodiment 1;

Fig. 9b is a specific flow diagram of embodiment 1;

FIG. 10 is a schematic structural diagram of a base station device provided by an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of another base station device provided by an embodiment of the present invention.

detailed description

Taking the TD-LTE system with 8-antenna 20MHz bandwidth introduced in the background technology as an example, the important reason for the high rate of the Ir interface between the BBU and the RRU is that the Ir interface needs to transmit the data of 8 antennas, and each data is 16bit quantization. The reason why 16-bit quantization is used is to improve the quantized signal-to-noise ratio of the signal and improve the demodulation capability of the base station. Small signals, so enough quantization bits are required to meet the dynamic range requirements (the difference between large and small signals) and to achieve sufficient accuracy requirements for the resolution of small signals.

In the prior art solution, the main process of processing data of 8 antennas is shown in FIG. 4 . The data is divided into two channels D1 and D2 after baseband processing such as encoding and modulation in the BBU and enters the antenna forming module. For D1 and D2, the antenna shaping module executes the shaping weights of each antenna generated by D1 and D2 and the weight calculation module in the BBU (that is, weights w1, w2...w8, corresponding to 8 antennas, assigned by type weight module calculated in advance) multiplication operation, so as to obtain 8 weight calculation results corresponding to different antennas, and obtain 8 channels of actual processing data respectively, and transmit them uniformly through the Ir interface between BBU and RRU to RRUs. Specifically, D1 is multiplied by w1, w2, w3 and w4 respectively, and D2 is multiplied by w5, w6, w7 and w8 respectively. Inside the RRU, each channel of data is sequentially processed by the digital intermediate frequency module, the transceiver processing TRX module, and the power amplifier/filter module, and finally the generated signal is transmitted through the antenna.

Generally, the corresponding relationship between antenna shaping weights and antennas is shown in FIG. 5 . At present, smart antennas generally consist of two groups of four antennas with different polarization directions (positive 45 degrees and negative 45 degrees), totaling eight antennas. Since the polarization direction of the two groups of antennas is 90 degrees perpendicular, they are completely independent of each other and carry two channels of data corresponding to D1 and D2 respectively. The distance between the four antennas in the same polarization direction is generally about 1/2 wavelength, which has a strong correlation, so the shaping of the user signal can be realized through an appropriate combination of weights (that is, the useful signal sent in the air is the strongest direction toward the user, while causing less interference in other directions).

Through the research to above-mentioned prior art, can draw following two characteristics of prior art:

1. The correlation between the four antennas in the same polarization direction is strong, so there is a large correlation between the four signals (or data weights);

2. The important factor leading to the high rate of the existing Ir interface is that each signal needs to transmit the original 16bit data. The purpose of using 16bit is only to cope with the change of signal size and to obtain a sufficient range of signal amplitude and resolution.

Based on the above two characteristics, the embodiment of the present invention considers using the correlation of data between antennas to reduce the number of actually transmitted bits, thereby reducing the rate of the Ir interface.

Since there is a certain correlation between the data of each of the four antennas, that is, the relationship between the magnitudes of the four data signals will not change suddenly, and the difference attributes between them generally fluctuate in a relatively small range, so that compared with the magnitude of the original signal , the number of bits required to represent the relative difference attribute will be greatly reduced. Therefore, in the actual data transmission, the data of the first channel can be used as the benchmark in each of the four channels, and the original data can still be transmitted with 16 bits. For the other three channels of data, only the difference value from the reference data is transmitted. Small, it can be represented by a smaller number of M bits (M<16), such as 8 bits. Then restore the original data of each path based on the reference value and the difference value at the opposite end. In the prior art, the bandwidth required to transmit original data using 16 bits (the upper bandwidth schematic diagram in Figure 6) and the solution provided by the embodiment of the present invention use 16 bits to transmit one original data for D1 and D2 respectively, while the other three channels of data Figure 6 shows the comparative schematic diagram of the bandwidth required for 8-bit transmission (the lower bandwidth schematic diagram in Figure 6).

Based on the above analysis, in order to reduce the data transmission volume of the Ir interface, the embodiment of the present invention provides an adjustment scheme for the interface rate of the base station equipment. The same channel of data received by multiple antennas is transmitted, but the data received by a certain antenna is used as a reference, and the data received by at least one other antenna is transmitted differentially, so that compared with the full transmission method, The actual data transmission volume of the Ir interface is greatly reduced.

The solutions provided by the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

First, an embodiment of the present invention provides a method for adjusting the interface rate of a base station device, including the following steps as shown in FIG. 7:

Step 71, the first base station equipment obtains multiple data;

For example, when the first base station device is an RRU, the RRU may perform radio frequency processing on raw data respectively received by multiple antennas, so as to obtain processed data respectively corresponding to different antennas, that is, obtain multi-channel data. Wherein, different channels of data in each channel of data are related to each other. The first base station equipment here can also be a BBU, and after the BBU obtains data from the core network, it obtains multi-channel data corresponding to different antennas through baseband processing and weight processing, and then sends them to the RRU for processing through the Ir interface, and the RRU processing is completed Then it is sent out through the antenna.

Generally, when the first base station device is a BBU, the second base station device described later is an RRU. And when the first base station device is an RRU, the corresponding second base station device is a BBU. Alternatively, the first and second base station devices may also be other base station devices different from the BBU and the RRU, and the interface between them may be an Ir interface or other types of interfaces.

Taking Figure 4 as an example, it can be assumed that the first base station equipment BBU has obtained the same channel of data received by its antennas 1~4, or it can be assumed that the BBU has obtained the same channel of data received by its antennas 5~8 respectively. data. After baseband processing such as coding and modulation is performed on the obtained data, the processed data is obtained. D1 and D2 as shown in Figure 4. Since the implementation of step 71 is similar to the prior art, it will not be repeated here.

Step 72, according to the preset antenna shaping weights, perform weight calculations on the obtained data of each channel respectively, and obtain corresponding weight calculation results;

Take Figure 4 as an example, D1 is the processed data. By calculating the products of D1 and w1, w2, w3 and w4 respectively, the weight settlement results for antennas 1 to 4 can be obtained.

Similarly, by calculating the products of D2 and w5, w6, w7 and w8 respectively, the weight settlement results for antennas 5~8 can be obtained.

Step 73: Determine at least one reference weight calculation result from the obtained weight calculation results, and use at least one other weight calculation result obtained except the reference weight calculation result as the weight calculation result to be differentiated, and determine The difference between the calculation result of the weight to be differentiated and the calculation result of the base weight specified in the determined base weight calculation result;

For example, from the weight settlement results for antennas 1 to 4, the weight calculation result for antenna 1 can be selected as the reference weight calculation result, and the weight calculation result for antenna 2 can be used as the weight calculation result to be differentiated, Therefore, the difference between the calculation result of the weight to be differentiated and the calculation result of the reference weight is determined, that is, D1×w2−D1×w1 is determined.

Step 74, according to the calculation result of the reference weight, the difference obtained by executing step 73, and other weight calculation results obtained except the calculation result of the reference weight and the calculation result of the weight to be differentiated, obtain the multi-channel quantization result, and The quantization result is sent to the second base station device through an interface (such as an Ir interface) between the first base station device and the second base station device.

Taking D1×w1 as the reference weight calculation result and D1×w2 as the pending difference weight calculation result as an example, the quantization objects can be D1×w1, D1×w2-D1×w1, D1×w3 and D1×w4.

Or, take D1×w1 as the reference weight calculation result, D1×w2 as the difference weight calculation result, and the quantization objects can also be D1×w1, D1×w2-D1×w1, D1×w3-D1×w2 and D1 ×w4-D1×w3.

Alternatively, D1×w1 is used as the reference weight calculation result, D1×w2 is the weight calculation result to be differentiated, and the quantization objects can also be D1×w1, D1×w2-D1×w1, D1×w3-D1×w1 and D1 ×w4-D1×w1.

It can be seen from the above quantified objects that, compared with the prior art, since the solution provided by the embodiment of the present invention uses a certain data as a reference, it performs differential transmission on at least one data related to the other data, so that compared to the The method of full-volume transmission greatly reduces the actual data transmission volume of the Ir interface.

The above-mentioned quantization objects can be changed according to actual needs, as long as it is ensured that a certain channel of data can be used as a reference, and at least other channels of data can be differentially transmitted. For example, it is assumed that only one reference weight calculation result is determined from the obtained weight calculation results, and only one other obtained weight calculation result is used as the weight calculation result to be differentiated. At the same time, assuming that the first base station equipment obtains N channels of data in total, and N>3, the specific determination method of the quantization result can be as follows:

First, the first base station calculates the difference between the m-th weight calculation result and the m-1-th weight calculation result for the obtained weight calculation results other than the reference weight calculation results, and obtains N-2 The difference, wherein, the calculation result of the weight to be differentiated can be used as the first weight calculation result, and m takes each natural number that satisfies greater than or equal to 2 and less than or equal to N-1 in turn;

For example, taking D1×w1 as the benchmark weight calculation result, and D1×w2 as the pending difference weight calculation result, then when m=2, the difference between the second weight calculation result and the first weight calculation result The value is D1×w3-D1×w2, and when m=3, the difference between the third weight calculation result and the second weight calculation result is D1×w4-D1×w3. If there are more antennas, the calculation method will be deduced by analogy.

Based on the first base station equipment quantization reference weight calculation result, the difference between the to-be-differentiated weight calculation result and the reference weight calculation result, and the obtained N-2 differences, the multi-channel quantization result can be obtained.

In addition, it should be noted that, in the process of obtaining multi-channel quantization results, the first base station device may quantize the reference weight calculation result and the obtained division reference weight calculation result and the weight to be differentiated based on the preset first quantization level. Other than the calculation result of the reference weight calculation result, and based on the preset second quantization level, quantify the difference between the calculation result of the weight value to be differentiated and the calculation result of the reference weight value, and the obtained N-2 difference values. Wherein, the second quantization level may be, but not limited to, set according to a predetermined reduction ratio of the bearer rate of the Ir interface.

Corresponding to the above method for adjusting the interface rate of the base station equipment, the embodiment of the present invention also provides a data processing method as shown in FIG. 8 , the method mainly includes the following steps:

Step 81, the second base station device receives multiple quantization results sent by the first base station device through the interface between the first base station device and the second base station device, where the multiple quantization results correspond to multi-channel data related to each other;

The first base station device here may be a BBU, and the second base station device may be an RRU. Alternatively, the first base station device may also be an RRU, and the corresponding second base station device may be a BBU. Alternatively, the first and second base station devices may also be other base station devices different from the BBU and the RRU, and the interface between them may be an Ir interface or other types of interfaces.

Step 82, the second base station device determines a benchmark quantization result from the multiple received quantization results according to a preset data restoration rule;

If the quantization result is determined by the first base station device according to the weight calculation results obtained by calculating the weights of the obtained data, then the reference quantization result may be the weight calculation results calculated by the first base station device At least one weight calculation result determined in . Among other quantization results except the benchmark quantization result, at least one quantization result is: the other weight calculation result except the at least one weight calculation result and the benchmark quantization specified from the determined benchmark weight calculation result The result difference.

In the preset data recovery rule, the quantization result corresponding to a certain antenna may be specified as the reference quantization result. For example, the rule may specify the identification of the benchmark quantization result. In this way, the second base station device can determine an identifier that matches the identifier of the reference quantization result from the identifiers that are set in advance for each channel of data. Based on the determined identifier, the quantization result corresponding to the identifier that matches the identifier of the reference quantization result among multiple quantization results can be determined as the reference quantization result.

In terms of specific implementation, taking an optical module of 10G rate level, and the first base station equipment is BBU and the second base station equipment is RRU as an example, the principle of determining the benchmark quantization result from multiple received quantization results is as follows:

In the Ir interface protocol, each channel of data in the 2*4 channels of data transmitted through the Ir interface will correspond to a unique number A. For 2×4 channels of data, the number A is generally 1, 2, ..., 8 in sequence . If it is assumed that the total amount of data transmitted through the Ir interface is 6400 bits, the average amount of data per channel is 6400/(2×4)=800 bits. For the 800bit data volume of each channel, the Ir interface protocol will further subdivide it. For example, assuming that a data block is 80 bits and the 800-bit data volume of each channel is divided, the 800-bit data of each channel can be divided into 10 data blocks, and the numbers C are generally 1, 2, ..., 10 in sequence.

According to the above provisions in the Ir interface protocol, in the embodiment of the present invention, as long as both the BBU and the RRU agree in advance which channel the benchmark quantization result is in (for example, for the first 4 channels of data in 2×4 channels of data, the benchmark quantization can be agreed The result is the channel of data numbered 3; for the last 4 channels of data in the 2×4 channels of data, it can be agreed that the benchmark quantization result is the channel of data numbered 8), and the RRU can be realized based on the difference corresponding to the BBU The identifier (such as the above-mentioned number A) assigned to each channel of data of the antenna and the identifier corresponding to the reference quantization result agreed by the BBU in advance determine the reference quantization result from the multiple quantization results sent by the BBU.

In step 83, the second base station converts other quantization results included in the plurality of quantization results except the benchmark quantization results into corresponding weight calculation results according to the benchmark quantization results and data recovery rules.

In the embodiment of the present invention, the data restoration rule may be agreed upon by the first base station device and the second base station device. For example, if the first base station equipment adopts a certain quantization method, it can agree with the second base station equipment on a corresponding data restoration rule. Specifically, if the quantization objects of the first base station equipment are D1×w1, D1×w2-D1×w1, D1×w3-D1×w2, and D1×w4-D1×w3, the corresponding data recovery rules can be agreed as follows :

1. The quantization result obtained by quantizing D1×w1 is the benchmark quantization result;

2. The quantization result corresponding to antenna 2 is the difference between the weight calculation result D1×w2 corresponding to antenna 2 and the reference quantization result;

3. The quantization result corresponding to antenna 3 is the difference between the weight calculation result D1×w3 corresponding to antenna 3 and the weight calculation result D1×w2 corresponding to antenna 2;

4. The quantization result corresponding to antenna 4 is the difference between the weight calculation result D1×w4 corresponding to antenna 4 and the weight calculation result D1×w3 corresponding to antenna 3 .

According to the data processing method provided by the embodiment of the present invention, the original data can be completely recovered from the differentially transmitted data.

The specific implementation of the above solution will be described in detail below by taking the practical application of the above solution provided by the embodiment of the present invention as an example.

specific embodiment

In this specific embodiment, the system shown in FIG. 9a is used to realize the solution provided by the embodiment of the present invention.

In this specific embodiment, it is assumed that there are two channels of business data D1 and D2 that have undergone baseband processing such as encoding and modulation in the BBU and enter the antenna forming module, wherein each channel of service data corresponds to four antennas, and each channel of service data is determined by the forming Calculated by the weight module. Then in this specific embodiment, the specific process for reducing the amount of data transmitted between the BBU and the RRU and ensuring that the RRU can restore the data includes the following steps as shown in Figure 9b:

In step 91, the two channels of service data D1 and D2 perform antenna shaping weight calculation in the shaping module of the BBU, and obtain weight calculation results corresponding to different antennas;

Specifically, each channel of service data is multiplied by four antenna shaping weights to obtain weight calculation results A1 to A8. Among them, A1=D1×w1, A2=D1×w2, A3=D1×w3, A4=D1×w4, A5=D2×w5, A6=D2×w6, A7=D2×w7, A4=D2×w8.

Among them, the distance between the four antennas assigned in each channel of data is about 1/2 wavelength, which has a strong correlation. They are perpendicular to each other, so they are completely independent of each other, carrying two channels of data, D1 and D2 respectively.

The shape of the signal can make the direction of the strongest useful signal sent in the air be aimed at the user, while the interference generated in other directions is small. The correlation between the four antennas in the same polarization direction is strong, so there is a large correlation between the four signals (or between the data weights).

Step 92, perform the following differential calculation for the obtained weight calculation results respectively corresponding to different antennas:

Delta2=D1W2-D1W1

Delta3=D1W3-D1W2

Delta4=D1W4-D1W3

Delta6=D2W6-D2W5

Delta7=D2W7-D2W6

Delta8=D2W8-D2W7

Among them, Delta2~Delta8 are called difference calculation results.

Step 93, perform quantization processing on the reference weight calculation results (A1, A5) and difference calculation results (Delta2~Delta8);

Among them, the reference weight calculation results are quantized with 16 bits. On the one hand, it is to improve the quantized signal-to-noise ratio of the signal and improve the demodulation capability of the base station. There are large and small signals at the same time, so enough quantization bits are needed to meet the dynamic range requirements (the difference between large and small signals) and to achieve sufficient accuracy requirements for the resolution of small signals.

Secondly, in the actual data transmission, the first channel data can be used as the benchmark in each of the four channels, and the original data is still transmitted using 16 bits. For the other three channels of data, only the difference value from the reference data is transmitted. The difference value is due to The fluctuation range is small, which can be represented by a small Nbit number (N<16).

The value used for Nbit quantization can be determined according to the required reduction rate ratio and tolerable error probability. Generally speaking, the correlation strength between the possible error and the actual signal and transmission errors are generated. The latter is mainly due to the error of a certain data transmission on the Ir interface, which will cause the subsequent data to be unable to return to normal. If it is a wired optical fiber, generally The bit error rate is below 10 (negative 12th power), and the error probability is small. Therefore, it mainly depends on the strength of signal correlation and the impact on the overall performance of the system. Generally speaking, 8bit can represent fluctuations in the range of 48dB, and most signal conversion ranges are within this range. Generally speaking, 8bit can represent fluctuations in the range of 48dB, and most of the signal variation range is within this range.

Step 94: Mix and transmit the quantization results obtained by executing step 93 to the RRU through the Ir interface;

In step 95, the RRU obtains eight channels of data, which are the quantization results corresponding to A1 and A5 and the quantization results corresponding to Delta2~Delta8, so that based on the quantization results corresponding to A1 and A5, according to the quantization results corresponding to Delta2~Delta8 and their correlation with A1 Or the relationship between the quantization results corresponding to A5, recover the quantization results corresponding to A2, A3, A4, A6, A7 and A8, and finally recover A1~A8, and the process ends.

With the above technical solution, the BBU no longer fully transmits the same channel of data received by multiple antennas through the Ir interface between it and the RRU, but uses the data received by a certain antenna as a reference to at least one other The difference transmission is performed on the data received by the two antennas, so that the actual data transmission volume of the Ir interface is greatly reduced compared with the full transmission mode.

In addition, an embodiment of the present invention also provides a base station device as shown in FIG. 10 , including the following functional units:

A data obtaining unit 101, configured to obtain multiple channels of data, wherein each channel of data is related to each other;

The weight calculation unit 102 is configured to perform weight calculation on each channel of data according to preset antenna shaping weights to obtain corresponding weight calculation results;

A reference determination unit 103, configured to determine at least one reference weight calculation result from the weight calculation results calculated by the weight calculation unit 102;

The difference determination unit 104 is configured to use at least one other weight calculation result obtained by the data obtaining unit 101 except the reference weight calculation result as the weight calculation result to be differentiated, and determine the difference between the weight calculation result to be differentiated and the weight calculation result from the reference the difference between the specified reference weight calculation results in the reference weight calculation results determined by the determining unit 103;

The quantization result determination unit 105 is configured to divide the calculation result of the reference weight value determined by the reference determination unit 103, the difference value determined by the difference value determination unit 104, and the calculation result of the reference weight value obtained by the data obtaining unit 101 and the weight to be differentiated. other weight calculation results other than the value calculation results to obtain multi-channel quantization results;

The sending unit 106 is configured to send the quantization result obtained by the quantization result determination unit 105 to other base station devices through the Ir interface.

Optionally, if it is assumed that there is one reference weight calculation result determined from the obtained weight calculation results; and one of the other weight calculation results obtained is used as the weight calculation result to be differentiated; Obtain N-way data, and N>3; then the quantization result determining unit 105 may specifically include:

The difference calculation subunit is used to calculate the difference between the mth weight calculation result and the m-1th weight calculation result for other weight calculation results obtained except the reference weight calculation result, to obtain N-2 difference values, wherein, the calculation result of the weight to be differentiated is the first weight calculation result, and m sequentially takes each natural number that satisfies greater than or equal to 2 and less than or equal to N-1;

The quantization subunit is used to obtain the multi-channel based on the calculation result of the quantization reference weight, the difference between the calculation result of the weight to be differentiated and the calculation result of the reference weight, and the N-2 differences obtained by the difference calculation subunit. Quantify results.

Optionally, the quantization result determining unit is specifically configured to: based on a preset first quantization level, quantify the reference weight calculation result and the obtained reference weights other than the reference weight calculation result and the to-be-difference weight calculation result. value calculation results, and quantify the difference based on a preset second quantization level;

Wherein, the second quantization level is set according to a predetermined reduction ratio of the bearer rate of the Ir interface.

At the same time, the embodiment of the present invention also provides another base station device as shown in Figure 11, including:

The receiving unit 111 is configured to receive multiple quantization results sent by other base station equipment through the Ir interface, wherein different channels of data in the multiple channels of data are related to each other;

A determination unit 112, configured to determine a reference quantization result from the plurality of quantization results received by the receiving unit 111 according to preset data restoration rules;

The conversion unit 113 is configured to, according to the reference quantization result determined by the determination unit 112 and the data restoration rule, convert other quantization results included in the plurality of quantization results received by the receiving unit 111 except the reference quantization result into Converted to the corresponding weight calculation results.

Optionally, corresponding to an implementation manner of the function of the determining unit 112, the determining unit 112 may be specifically divided into the following functional modules:

The first identification determination module is used to determine the identification of the benchmark quantification result stipulated in the data restoration rules;

The second identification determination module is used to determine the identification matching with the identification of the benchmark quantization result determined by the first identification determination module from the identifications set in advance for each channel of data transmitted through the Ir interface;

A reference quantization result determining module, configured to determine, from the plurality of quantization results, a quantization result corresponding to the identifier determined by the second identifier determining module as a reference quantization result.

In addition, an embodiment of the present invention also provides a system for adjusting the interface rate of base station equipment, including a first base station equipment and a second base station equipment, wherein:

The first base station equipment is used to obtain multiple channels of data, wherein the data of each channel is related to each other; according to the preset antenna shaping weight, the weight calculation is performed on the data of each channel respectively, and corresponding calculation results of each weight are obtained; Determine at least one reference weight calculation result from the obtained weight calculation results, and use at least one other weight calculation result except the reference weight calculation result as the pending difference weight calculation result to determine the pending difference weight The difference between the value calculation result and the reference weight calculation result specified from the determined reference weight calculation result; according to the reference weight calculation result, the difference, and the obtained division reference weight calculation result and the weight calculation to be differentiated other weight calculation results other than the result, obtain multi-channel quantization results, and send the quantization results to the second base station device through the Ir interface;

The second base station device is configured to receive a plurality of quantization results sent by the first base station device through the Ir interface, wherein each quantization result corresponds to each channel of data in multiple channels of data related to each other; according to a preset data recovery rule , determining a benchmark quantization result from the plurality of quantization results; and according to the benchmark quantization result and the data restoration rule, converting other quantization results included in the plurality of quantization results except the benchmark quantization result, respectively Calculate the result for the corresponding weight.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and combinations of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a Means for realizing the functions specified in one or more steps of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (18)

1. a kind of method of adjustment of base station equipment interface rate, it is characterised in that including：

First base station equipment obtains multichannel data；

According to antenna shape-endowing weight value set in advance, weight computing is carried out to each circuit-switched data respectively, each corresponding weights are obtained Result of calculation；

At least one benchmark weight computing result is determined from obtained weight computing result, and to obtain except benchmark power At least one other weight computing result outside value result of calculation is as difference weight computing result is treated, it is determined that treating difference weights meter Calculate the difference of result and the benchmark weight computing result specified from the benchmark weight computing result of determination；

According to benchmark weight computing result, the difference and obtain except benchmark weight computing result and treat difference weight computing As a result other weight computing results beyond, obtain multichannel quantized result, and be sent to the quantized result by Ir interfaces Second base station equipment；

Wherein, the benchmark weight computing result is with treating that difference weight computing result has correlation.

2. the method as described in claim 1, it is characterised in that the benchmark weights meter determined from obtained weight computing result It is one to calculate result；And using other weight computing results described in obtain one as treating difference weight computing result；And first Base station equipment obtains N circuit-switched datas, and N altogether>3；Then

First base station equipment according to benchmark weight computing result, the difference and obtain except benchmark weight computing result and treating Other weight computing results beyond difference weight computing result, obtain multichannel quantized result, specifically include：

First base station equipment is directed to obtained other weight computing results in addition to the benchmark weight computing result, calculates m The difference of individual weight computing result and the m-1 weight computing result, obtains N-2 difference；Wherein, it is described to treat difference weights meter It is the 1st weight computing result to calculate result, and m takes each natural number met more than or equal to 2 and less than or equal to N-1 successively；

First base station equipment quantifies benchmark weight computing result, treats the difference of difference weight computing result and benchmark weight computing result Value, and the obtained N-2 difference, obtain multichannel quantized result.

3. the method as described in claim 1, it is characterised in that according to benchmark weight computing result, the difference and obtain Except benchmark weight computing result and other weight computing results in addition to treating difference weight computing result, obtain multichannel and quantify knot Really, specifically include：

First base station equipment is based on default first quantification gradation, quantifies benchmark weight computing result and obtains except benchmark weights Result of calculation and treat other benchmark weight computing results beyond difference weight computing result, and quantify etc. based on default second Level, quantifies the difference；

Wherein, the second quantification gradation is the predetermined reduction ratio setting of the bearer rate according to the Ir interfaces.

4. a kind of data processing method, it is characterised in that including：

Second base station equipment receives multiple quantized results that first base station equipment is sent by Ir interfaces；

According to the data recovery rule pre-set, benchmark quantized result is determined from the multiple quantized result；

And according to the benchmark quantized result and data recovery rule, benchmark is removed by what is included in the multiple quantized result Other quantized results outside quantized result are respectively converted into corresponding weight computing result；

Wherein, the benchmark quantized result has correlation with described other quantized results in addition to benchmark quantized result.

5. method as claimed in claim 4, it is characterised in that the second base station equipment is advised according to the data recovery pre-set Then, benchmark quantized result is determined from the multiple quantized result, is specifically included：

Second base station equipment determines the mark of benchmark quantized result specified in the data recovery rule；

From the mark set respectively for each circuit-switched data for being transmitted by Ir interfaces in advance, it is determined that with benchmark quantized result The consistent mark of mark matching；And

From the multiple quantized result, by the corresponding quantization knot of the mark consistent with the mark matching of benchmark quantized result Really, it is defined as benchmark quantized result.

6. the method as described in claim 4 or 5, it is characterised in that the quantized result is that first base station equipment is right according to its Each circuit-switched data obtained carries out obtained each weight computing result of weight computing and determined；Then

The benchmark quantized result is at least one weights determined from described each weight computing result for calculating and obtaining Result of calculation；And

In other quantized results in addition to the benchmark quantized result, at least one quantized result is：Except it is described at least one Other weight computing result outside weight computing result and the datum quantity specified from the benchmark weight computing result of determination Change the difference of result.

7. a kind of base station equipment, it is characterised in that including：

Data acquiring unit, for obtaining multichannel data；

Weight calculation unit, for according to antenna shape-endowing weight value set in advance, respectively for each of data acquiring unit acquisition Circuit-switched data carries out weight computing, obtains each corresponding weight computing result；

Benchmark determining unit, for determining that at least one benchmark is weighed in calculating obtained weight computing result from weight calculation unit It is worth result of calculation；

Difference value determining unit, at least one in addition to the benchmark weight computing result that is obtained with data acquiring unit its His weight computing result is as treating difference weight computing result, it is determined that from treating that difference weight computing result and benchmark determining unit are true The difference for the benchmark weight computing result specified in fixed benchmark weight computing result；

Quantized result determining unit, for determined according to benchmark determining unit benchmark weight computing result, difference value determining unit Determine the difference, and data acquiring unit obtain except benchmark weight computing result and treat difference weight computing result with Other outer weight computing results, obtain multichannel quantized result；

Transmitting element, is used for and by Ir interfaces, the quantized result that quantized result determining unit is obtained is sent to other base stations Equipment；

Wherein, the benchmark weight computing result is with treating that difference weight computing result has correlation.

8. equipment as claimed in claim 7, it is characterised in that the benchmark weights meter determined from obtained weight computing result It is one to calculate result；And using other weight computing results described in obtain one as treating difference weight computing result；And data Obtaining unit obtains N circuit-switched datas, and N altogether>3；Then

The quantized result determining unit, is specifically included：

Mathematic interpolation subelement, for other weight computing results in addition to the benchmark weight computing result for obtaining, The difference of m-th of weight computing result and the m-1 weight computing result is calculated, N-2 difference is obtained, wherein, it is described to treat difference Fraction value result of calculation is the 1st weight computing result, and m take successively meet more than or equal to 2 and less than or equal to N-1 it is each from So count；

Quantify subelement, for according to quantify benchmark weight computing result, treat difference weight computing result and benchmark weight computing As a result difference, and the N-2 difference that mathematic interpolation subelement is obtained, obtain multichannel quantized result.

9. equipment as claimed in claim 7, it is characterised in that the quantized result determining unit specifically for：Based on default The first quantification gradation, quantify benchmark weight computing result and obtain except benchmark weight computing result and treating difference weight computing As a result other benchmark weight computing results beyond, and based on default second quantification gradation, quantify the difference；

Wherein, the second quantification gradation is the predetermined reduction ratio setting of the bearer rate according to the Ir interfaces.

10. the equipment as described in claim 7~9 is any, it is characterised in that the quantized result is sent to other base stations and set Standby base station equipment is baseband processing equipment BBU, and other described base station equipments are radio frequency remote equipment RRU；Or

The base station equipment that the quantized result is sent into other base station equipments is RRU, and other described base station equipments are BBU.

11. a kind of base station equipment, it is characterised in that including：

Receiving unit, for receiving multiple quantized results that other base station equipments are sent by Ir interfaces；

Determining unit, it is true in the multiple quantized results received from receiving unit for according to the data recovery rule pre-set Determine benchmark quantized result；

Converting unit, for the benchmark quantized result determined according to determining unit and data recovery rule, will be received Other quantized results in addition to benchmark quantized result included in the multiple quantized result that unit is received, are respectively converted into phase The weight computing result answered；

Wherein, the benchmark quantized result has correlation with described other quantized results in addition to benchmark quantized result.

12. equipment as claimed in claim 11, it is characterised in that the determining unit is specifically included：

First mark determining module, the mark for determining benchmark quantized result specified in the data recovery rule；

In second mark determining module, the mark that each circuit-switched data for being transmitted from advance by Ir interfaces is set respectively, It is determined that the mark of the benchmark quantized result determined with the first mark determining module matches consistent mark；

Benchmark quantized result determining module, for that from the multiple quantized result, will be determined with the second mark determining module The corresponding quantized result of mark be defined as benchmark quantized result.

13. the equipment as described in claim 11 or 12, it is characterised in that the quantized result is first base station equipment according to it Each weight computing result that each circuit-switched data progress weight computing of acquisition is obtained is determined；Then

The benchmark quantized result is at least one weights determined from described each weight computing result for calculating and obtaining Result of calculation；And

In other quantized results in addition to the benchmark quantized result, at least one quantized result is：Except it is described at least one Other weight computing result outside weight computing result and the datum quantity specified from the benchmark weight computing result of determination Change the difference of result.

14. the equipment as described in claim 11 or 12, it is characterised in that receive the quantization knot of other base station equipments transmission The base station equipment of fruit is BBU, and other described base station equipments are radio frequency remote equipment RRU；Or

The base station equipment for receiving the quantized result of other base station equipments transmission is RRU, and other described base station equipments are radio frequency Remote device BBU.

15. a kind of adjustment system of base station equipment interface rate, it is characterised in that set including first base station equipment and the second base station It is standby, wherein：

First base station equipment, for obtaining multichannel data；According to antenna shape-endowing weight value set in advance, each circuit-switched data is entered respectively Row weight computing, obtains each corresponding weight computing result；At least one benchmark is determined from obtained weight computing result Weight computing result, and using obtained at least one other weight computing result in addition to the benchmark weight computing result as Difference weight computing result is treated, it is determined that treating difference weight computing result and the base specified from the benchmark weight computing result of determination The difference of quasi- weight computing result；According to benchmark weight computing result, the difference and obtain remove benchmark weight computing knot Fruit and treat other weight computing results beyond difference weight computing result, obtain multichannel quantized result, and pass through Ir interfaces will The quantized result is sent to the second base station equipment；

Second base station equipment, for receiving multiple quantized results that first base station equipment is sent by Ir interfaces；According to setting in advance The data recovery rule put, determines benchmark quantized result from the multiple quantized result；And according to the benchmark quantized result With data recovery rule, other quantized results in addition to benchmark quantized result included in the multiple quantized result are divided Corresponding weight computing result is not converted to；

Wherein, the benchmark weight computing result is with treating that difference weight computing result has correlation；The benchmark quantized result There is correlation with described other quantized results in addition to benchmark quantized result.

16. system as claimed in claim 15, it is characterised in that the benchmark weights determined from obtained weight computing result Result of calculation is one；And using other weight computing results described in obtain one as treating difference weight computing result；And the One base station equipment obtains N circuit-switched datas, and N altogether>3；Then

First base station equipment specifically for：For obtained other weight computing knots in addition to the benchmark weight computing result Really, the difference of m-th of weight computing result and the m-1 weight computing result is calculated, N-2 difference is obtained；Wherein, it is described to treat Difference weight computing result is the 1st weight computing result, and m takes satisfaction each more than or equal to 2 and less than or equal to N-1 successively Natural number；And quantify benchmark weight computing result, treat the difference of difference weight computing result and benchmark weight computing result, and The obtained N-2 difference, obtains multiple quantized results.

17. system as claimed in claim 15, it is characterised in that first base station equipment specifically for：

Based on default first quantification gradation, quantify benchmark weight computing result and obtain except benchmark weight computing result and treat Other benchmark weight computing results beyond difference weight computing result, and based on default second quantification gradation, quantify described Difference；

Wherein, the second quantification gradation is the predetermined reduction ratio setting of the bearer rate according to the Ir interfaces.

18. the system as described in claim 15~17 is any, it is characterised in that the first base station equipment is RRU, described the Two base station equipments are BBU；Or

The first base station equipment is BBU, and second base station equipment is RRU.