CN102065470B - Data transmission method, device and distributed base station system - Google Patents
Data transmission method, device and distributed base station system Download PDFInfo
- Publication number
- CN102065470B CN102065470B CN 200910223372 CN200910223372A CN102065470B CN 102065470 B CN102065470 B CN 102065470B CN 200910223372 CN200910223372 CN 200910223372 CN 200910223372 A CN200910223372 A CN 200910223372A CN 102065470 B CN102065470 B CN 102065470B
- Authority
- CN
- China
- Prior art keywords
- data
- bit
- antenna
- road
- message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
Abstract
The invention discloses a data transmission method, a data transmission device and a distributed base station system. The method comprises that: a radio remote unit (RRU) compresses in-phase/quadrature (I/Q) paths of data of each antenna, and generates a message code stream by using the compressed data; the RRU transmits the generated message code stream to a base band unit (BBU); and the BBU receives the message code stream, extracts the I/Q paths of compressed data from the message code stream and decompresses the I/Q paths of compressed data to obtain the I and Q paths of data of each antenna. In the data transmission method, the data transmission device and the distributed base station system, the I/Q paths of data of each antenna are compressed on the RRU side, and the I/Q paths of compressed data are transmitted between the RRU and the BBU by adopting an optimal module supporting a relatively lower data transmission rate, and the I/Q paths of compressed data are decompressed to recover the compressed data on the BBU side. Therefore, a link bearing rate is increased on the bases of not increasing the cost and using the optimal module supporting the relatively lower data transmission rate.
Description
Technical field
The present invention relates to the distributed base station technology in mobile communication system, relate in particular to a kind of data transmission method, device and distributed base station system.
Background technology
In present 3G system, distributed base station is used on a large scale, distributed base station is by Remote Radio Unit (Radio Remote Unit, RRU) and indoor baseband processing unit (Building Base band Unit) form, BBU is connected with RRU and is connected by optical fiber, and RRU is connected to antenna.
(the Open Base Station Architecture Initiative of Open Base Station Architecture alliance, OBSAI) agreement link load-carry duty is lower, the configuration of existing open base station is 10M for example, the configuration of 4 antennas, use the lower optical module (optical module of 1.5G) of base band data speed to get final product, if realize larger link bearer rate, for example use the 10M bandwidth, the configuration of 8 antennas, can be so that the transmission quantity of data increases greatly, but such configuration must be used the optical module of supporting high data rate between RRU and BBU, the optical module of high data rate is because price is more expensive, how on the basis of using the optical module of supporting lower data transmission rate, improve as far as possible the link bearer rate, do not raise the cost again, it is the industry problem demanding prompt solution.
Summary of the invention
The embodiment of the present invention provides a kind of data transmission method, device and distributed base station system, in order to solve on the basis that does not raise the cost, uses the optical module of supporting lower data transmission rate, realizes the problem of higher link bearer rate.
A kind of data transmission method that the embodiment of the present invention provides comprises:
Radio frequency remote unit RRU is compressed the I/Q circuit-switched data of each antenna, and the data generating messages message code stream after compressing; Described RRU compresses the I/Q circuit-switched data, comprising:
Respectively from the first data of M the bit bit wide on I road corresponding to each antenna and Q road, extract successively M/2 bit data by higher bit position to low bit, and the exponent data of the initial bits position of the record sign data of extracting; Described M is the I road of antenna and the original bit wide of Q circuit-switched data;
The exponent data of the M/2bit data extracted and 1bit is merged into the second data of M/2+1 bit bit wide;
Second data on the I road that each antenna is corresponding and Q road are merged into the 3rd data of M+2 bit bit wide;
The 3rd adjacent data of every two transmitting times that each antenna is corresponding merge, and generate the 4th data of 2M+4 bit bit wide;
Described RRU is sent to indoor baseband processing unit BBU with the message code stream that generates;
Described BBU receives the message code stream, and payload data from the message code stream carries out bit width conversion with the payload data that extracts, and converts the 4th data of 2M+4 bit bit wide to;
Described the 4th data transaction is become the 3rd data of M+2 bit bit wide;
Described the 3rd data further are split as the second data of two-way M/2+1 bit bit wide;
Extract respectively in two-way the second data the highest order data as exponent data, according to the bit of described exponent data indication, usage data zero is expanded the data of the bit of the M/2 except described exponent data in the second data, generation I road and Q circuit-switched data.
Further, the data after described will the compression generate the message code stream, comprising:
The 4th data that each antenna is corresponding write respectively in the first-in first-out cell fifo corresponding with each antenna;
Sense data from each cell fifo successively;
The bit width conversion of the data of reading is become to generate the required bit wide of message;
With the payload of the data after conversion as message, generate the message code stream.
A kind of radio frequency remote unit RRU that the embodiment of the present invention provides comprises:
Compression unit is used for the I/Q circuit-switched data that receives is compressed; Described I/Q circuit-switched data to reception is compressed, comprise: respectively from the first data of M the bit bit wide on I road corresponding to each antenna and Q road, extract successively M/2 bit data by higher bit position to low bit, and the exponent data of the initial bits position of the record sign data of extracting; Described M is the I road of antenna and the original bit wide of Q circuit-switched data; The exponent data of the M/2bit data extracted and 1bit is merged into the second data of M/2+1 bit bit wide; Second data on the I road that each antenna is corresponding and Q road are merged into the 3rd data of M+2 bit bit wide; The 3rd adjacent data of every two transmitting times that each antenna is corresponding merge, and generate the 4th data of 2M+4 bit bit wide;
Message m essage generation unit, the data after being used for compressing generate the message code stream, and the message code stream that generates is sent to indoor baseband processing unit BBU.
Further, the Remote Radio Unit that the embodiment of the present invention provides also comprises: read/write control unit, bit width conversion unit and first-in first-out cell fifo; Wherein:
Described read/write control unit, the 4th data after being used for compressing write the first-in first-out cell fifo corresponding with each antenna, and sense data from each cell fifo successively;
Described bit width conversion unit is for the required bit wide of bit width conversion one-tenth generation message of the data that will read;
Described message generation module also is used for the payload generation message code stream of the data after bit width conversion as message;
Described cell fifo is for the 4th data after store compressed.
The embodiment of the present invention also provides a kind of indoor baseband processing unit BBU, comprising:
Message m essage extraction unit is used for extracting the payload data of message as the I/Q circuit-switched data after compressing from the message code stream that radio frequency remote unit RRU sends;
The bit width conversion unit is used for the payload data that described message extraction unit extracts is converted to the 4th data of 2M+4 bit bit wide; Described M is the I road of antenna and the original bit wide of Q circuit-switched data;
The data decompression unit is for the 4th data transaction being become the 3rd data of M+2 bit bit wide; The 3rd data further are split as the second data of two-way M/2+1 bit bit wide, extract respectively in two-way the second data the highest order data as exponent data, bit according to described exponent data indication, usage data zero is expanded the data of the bit of the M/2 except described exponent data in the second data, generates I road and Q circuit-switched data.
The embodiment of the present invention also provides a kind of distributed base station system, comprising:
Radio frequency remote unit RRU is used for the I/Q circuit-switched data that receives is compressed, and with the data generating messages message code stream after compression, and the message code stream that generates is sent to indoor baseband processing unit BBU; Described I/Q circuit-switched data to reception is compressed, comprise: respectively from the first data of M the bit bit wide on I road corresponding to each antenna and Q road, extract successively M/2 bit data by higher bit position to low bit, and the exponent data of the initial bits position of the record sign data of extracting; Described M is the I road of antenna and the original bit wide of Q circuit-switched data; The exponent data of the M/2bit data extracted and 1bit is merged into the second data of M/2+1 bit bit wide; Second data on the I road that each antenna is corresponding and Q road are merged into the 3rd data of M+2 bit bit wide; The 3rd adjacent data of every two transmitting times that each antenna is corresponding merge, and generate the 4th data of 2M+4 bit bit wide;
Indoor baseband processing unit BBU is used for extracting from the message code stream that RRU sends the payload data of message, described payload data is converted to the 4th data of 2M+4 bit bit wide; Described M is the I road of antenna and the original bit wide of Q circuit-switched data; The 4th data transaction is become the 3rd data of M+2 bit bit wide; The 3rd data further are split as the second data of two-way M/2+1 bit bit wide, extract respectively in two-way the second data the highest order data as exponent data, bit according to described exponent data indication, usage data zero is expanded the data of the bit of the M/2 except described exponent data in the second data, generates I road and Q circuit-switched data.
The beneficial effect of the embodiment of the present invention comprises:
The data transmission method that the embodiment of the present invention provides, device and distributed base station system, the radio frequency remote unit RRU side is compressed the I/Q circuit-switched data of each antenna, and the data after compressing generate the message code stream; RRU is sent to indoor baseband processing unit BBU with the message code stream that generates; BBU extracts I road and the Q circuit-switched data that the I/Q circuit-switched data after compressing decompresses and obtains each antenna from the message code stream after receiving the message code stream.The embodiment of the present invention is compressed the I/Q circuit-switched data of antenna in the RRU side, transmit between RRU and BBU be the compression after the I/Q circuit-switched data, can adopt and support the optical module of lower data transmission rate to transmit, the I/Q circuit-switched data after the BBU side is to compression decompresses.Thereby realized improving the link bearer rate not increasing cost, using on the basis of the optical module of supporting lower data transmission rate.
Description of drawings
The flow chart of the data transmission method that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 moves towards figure for the data flow of the data transmission method that the embodiment of the present invention provides;
Fig. 3 is the schematic diagram of the data of 9bit bit wide for the data compression with the 16bit bit wide that the embodiment of the present invention provides;
The payload data with in message that Fig. 4 provides for the embodiment of the present invention converts the schematic diagram of the data of 9bit bit wide to;
The structural representation of a kind of Remote Radio Unit that Fig. 5 provides for the embodiment of the present invention;
The structural representation of a kind of indoor baseband processing unit that Fig. 6 provides for the embodiment of the present invention;
The structural representation of a kind of distributed base station system that Fig. 7 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, with specific embodiment, a kind of data transmission method provided by the invention, device and distributed base station system are described in detail.
The data transmission method that the embodiment of the present invention provides in distributed base station system, as shown in Figure 1, comprises the steps:
S101, radio frequency remote unit RRU are compressed the I/Q circuit-switched data of each antenna in application layer, and the data generating messages after compressing (the basic frame structure of OBSAI agreement regulation is message) code stream;
S102, RRU are sent to indoor baseband processing unit BBU with the message code stream that generates;
The message code stream that S103, BBU receive, the I/Q circuit-switched data after application layer extracts compression from message, I road and Q circuit-switched data that the I/Q circuit-switched data after compression is decompressed and obtains respectively each antenna.
Fig. 2 is that the data flow of the data transmission method that provides of the embodiment of the present invention is moved towards figure.In the RRU side, after the I/Q circuit-switched data of antenna is compressed by application layer, comprise the transmission control operations such as route, multiplexing and demultiplexing, summation through transport layer, data link layer is carried out the processing such as framing and link synchronization, carries out encoding and decoding, string and conversion in physical layer, is sent to BBU by the optical interface between RRU and BBU, the BBU side, through after the respective handling of physical layer, data link layer and transport layer, in the operation that application layer decompresses, reduction I/Q circuit-switched data.
In above-mentioned steps S101, RRU compresses the I/Q circuit-switched data, specifically comprises:
Extract successively the data of M/2bit from a high position to the low level respectively from the first data of the individual bit bit wide of M (M is the I road of antenna and the original bit wide of Q circuit-switched data) on I road corresponding to each antenna and Q road, and record the exponent data of the initial bits position that characterizes the data of extracting;
The exponent data of the M/2bit data extracted and 1bit is merged into second data of (M/2+1) individual bit bit wide;
Second data on the I road that each antenna is corresponding and Q road are merged into the 3rd data of (M+2) individual bit bit wide;
The 3rd adjacent data of every two transmitting times that each antenna is corresponding merge, and generate the 4th data of (2M+4) individual bit bit wide.
In above-mentioned steps S103, the data after compression are generated the message code stream, detailed process is as follows:
The 4th data that each antenna is corresponding write respectively in the first-in first-out cell fifo corresponding with each antenna;
Sense data from each cell fifo successively;
The bit width conversion of the data of reading is become to generate the required bit wide of message;
With the payload of the data after conversion as message, generate the message code stream.
The BBU side comprises in the processing procedure of application layer to the message code stream:
Extract the payload data of each message;
The payload data that extracts is carried out bit width conversion, convert the 4th data of 2M+4 bit bit wide to, the I/Q circuit-switched data after being compressed.
Described the 4th data transaction is become the 3rd data of M+2 bit bit wide;
Described the 3rd data further are split as the second data of two-way M/2+1 bit bit wide;
Extract respectively in two-way the second data the highest order data as exponent data, according to the bit of described exponent data indication, usage data zero is expanded the data of the bit of the M/2 except described exponent data in the second data, generation I road and Q circuit-switched data.
In order to be illustrated more clearly in the processing procedure of RRU side and BBU side, the below describes with a concrete example.
In this example, the antenna amount that is connected with RRU is 8 antennas, and each antenna all comprises the I road, the Q circuit-switched data, and the initial data (the first data) on I road and Q road is all the transmission rate of 16bit, 1chip (chip).I road and Q circuit-switched data to 8 antennas are carried out respectively following processing: every 8 16bit data (for example I circuit-switched data of 8 antennas) B0～B7 is taken absolute value, the highest order that is about to B0～B7 all gets 0, then compare these 8 16bit data, determine the absolute value maximum one, suppose it is B5, if the Senior Three position of B5 is 0, from a high position to the low level, 8 bit data of the b12 to b5 of each 16bit data are extracted, and to indicate the initial bits position of the data of being extracted with exponent data " 3 " be to begin 3 of displacements from a high position to begin to extract, so just the data compression of every 8 16bit bit wides is the data (the second data) of 9bit bit wide originally.As shown in Figure 3, what represent in the square frame on the right in Fig. 3 is the data of 8 16bit bit wides, and what represent in the square frame on the left side is the data of 8 9bit bit wides after extracting.
The 9bit data on will be through each antenna that said process is processed corresponding I road and Q road merge, be merged into the data (the 3rd data) of 18bit bit wide, again upper former and later two data of time are merged further, generate the data (the 4th data) of 36bit bit wide.
Top process can also use following mathematical expression to represent: suppose that K antenna all has the I road, the Q circuit-switched data, each road each M bit, the transmission rate of N chip, after being compressed, the data on each road are (M/2+1) individual bit bit wide, the data into (M+2) bit bit wide can be obtained after each antenna I road and Q road merge, the data of 2 (M+2) individual bit bit wide can be derived as after then will the front and back adjacent two data merging.
If on the basis of the optical module of existing 4x OBSAI link bearer 10M, 4 antenna configurations, the base band data of transmission 10M, 8 antennas, so for guarantee transmission rate can with 4x OBSAI link and optical module coupling, need to recomputate the payload of each message carrying.
Through after above-mentioned compression process, the base band speed of an antenna is (N/2) (2M+4)=N (M+2), and the base band speed of K antenna is
The base band data speed through 4 antennas of data compression is not K N 2M, and therefore, the data rate after K antenna compresses as can be known with the base band data speed after K antenna compression and its contrast is unpressed K/2 antenna base band data speed
Doubly.Accordingly, the payload of each message carrying should correspondingly be increased to i.e. 18 bytes of 16*18/16 also from 16 bytes.
The data (the 4th data) of the 36bit bit wide after compression are write in first-in first-out unit (First in First Out, FIFO), namely the data of 8 antennas will be write respectively in 8 cell fifos accordingly.In this example, take width as 36bit, the FIFO of degree of depth 2K is example.
Because the speed that data fifo reads is 8 times that write, suppose that the speed that writes is 36bit/s, the speed that reads so is 8.When reading with data writing, data cell by certain data volume reads and writes, therefore the data volume that is to say the data cell of write-once is 576*36bit, and time of writing of data unit is 576s, and the time of reading 1 data unit is: 576/8=72s.In the process that FIFO writes and reads, need to guarantee that each FIFO can not be read sky, can not be fully written again and overflow.So must be accurate for the control that writes and read to FIFO.Because reading the mode of each FIFO is polling type, after namely running through a data unit from a FIFO, just can turn to next FIFO to continue to read, after the 7th FIFO reads, just can turn to from the 8th FIFO and read, correspondingly, after reading from the 8th FIFO, then turn to from the 1st FIFO and read.
Guarantee that the controlled condition that each FIFO is not fully written is as follows: need expend 72*7=504s because read front 7 FIFO, reading the initial time of current FIFO, the data volume that writes in the FIFO that its last time reads can not be greater than (2048-504) * 36bit=1544*36bit.
Guarantee that each FIFO is not read empty controlled condition as follows: read the initial time of certain FIFO, the data of all FIFO should be in 504*36bit～1544*36bit scope.
For the configuration of 4x OBSAI link, the data in the data cell of reading from FIFO are assigned in 4 message simultaneously, as the payload of 4 message carryings.But the embodiment of the present invention is not limited to 4x OBSAI link, configuration for 1x OBSAI link, 2x OBSAI link, the data allocations of reading in the message of respective numbers, for example for the configuration of 2x OBSAI link, is needed in data allocations to 2 message who reads.
The bit wide of the data of reading from 8 FIFO is 36bit, and the input data bit width that existing OBSAI protocol definition generates message is 8bit.Therefore, the data transaction of the 36bit bit wide of reading need to be become the data of 8bit bit wide.
For these three kinds of configurations of OBSAI link of compatible 1x, 2x and 4x simultaneously better, in embodiments of the present invention, preferably, the bit width conversion of 36bit is become the 9bit bit wide, and then with the 9bit bit wide, convert the 8bit bit wide to, in the specific implementation, can use the realizations such as dual port RAM.
RRU is sent to BBU with the message code stream that generates.
the BBU side, carry out the processing with RRU side contrary, BBU extracts the payload of 18 bytes of carrying in each message in the message code stream that receives, and the payload data that extracts is carried out the data bit width conversion, first the 8bit bit width conversion is become the bit wide of 9bit, utilize process that dual port RAM carries out bit width conversion as shown in Figure 4, what represent in the square frame of Fig. 4 right side is the payload data (bit wide is 8bit) of 18 bytes in each message, what represent in the square frame of left side is the data of the 9bit bit wide after conversion, during bit width conversion, first read last two data B16 and B17, then read front 16 data B0～B15, then B16 and B17 are carried out serial shift, be merged into B0～B15 the data that bit wide is 9bit.Then
and then the 9bit bit width conversion is become the data of 36bit bit wide, the 4th data format after the data of the 36bit bit wide after conversion and RRU side pressure contracting is identical, then be the data of two 18bit with the 36bit Data Division, then the data of 18bit bit wide are split as further the data of two 9bit bit wides, the highest order of continuous 8 9bit data is preserved by shift register, it is exactly the exponent data of these 8 data, according to exponent data, the data of least-significant byte are carried out the expansion of bit, at corresponding high-order and low level padding data zero, it is finally expanded to the 16bit data, the data that the BBU side decompresses are compressed front data from the RRU side and are compared slightly different, difference is exactly compression loss, through evidence, the data transmission method that adopts the embodiment of the present invention to provide, but on the impact of signal quality in the range of receiving of distributed base station system.
Based on same inventive concept, a kind of radio frequency remote unit RRU, a kind of indoor baseband processing unit BBU and a kind of distributed base station system also are provided in the embodiment of the present invention, because the principle that these equipment and systems are dealt with problems is similar to aforementioned a kind of data transmission method, therefore the enforcement of these equipment can referring to the enforcement of method, repeat part and not give unnecessary details.
A kind of radio frequency remote unit RRU that the embodiment of the present invention provides as shown in Figure 5, comprising: compression unit 501 and message generation unit 502; Wherein:
Further, above-mentioned compression unit 501, also be used for respectively being extracted successively the data of M/2 bit to low level by a high position from the first data of M the bit bit wide on I road corresponding to each antenna and Q road, and record the exponent data of the initial bits position of the sign data of extracting; Described M is the original bit wide of I road and Q circuit-switched data; The exponent data of the M/2bit data extracted and 1bit is merged into the second data of M/2+1 bit bit wide; Second data on the I road that each antenna is corresponding and Q road are merged into the 3rd data of M+2 bit bit wide; The 3rd adjacent data of every two transmitting times that each antenna is corresponding merge, and generate the 4th data of 2M+4 bit bit wide.
Further, the RRU that the embodiment of the present invention provides also comprises: read/write control unit 503, bit width conversion unit 504 and first-in first-out cell fifo 505; Wherein:
The read/write control unit, the 4th data after being used for compressing write the first-in first-out cell fifo corresponding with each antenna, and sense data from each cell fifo successively;
The bit width conversion unit is for the required bit wide of bit width conversion one-tenth generation message of the data that will read;
The message generation module also is used for the payload generation message code stream of the data after bit width conversion as message;
Cell fifo is for the 4th data after store compressed.
In the RRU that the embodiment of the present invention provides, the quantity of FIFO equates with the quantity of antenna, the quantity of message generation module is relevant with the OBSAI link configuration, if 4x OBSAI link, adopt 4 message generation modules, for the OBSAI link of 1x, 2x, the quantity of corresponding message generation module is 1 and 2.
A kind of indoor baseband processing unit BBU that the embodiment of the present invention provides as shown in Figure 6, comprising: message extraction unit 601 and data decompression unit 602; Wherein:
Further, the RRU that the embodiment of the present invention provides also comprises: bit width conversion unit 603 is used for the payload data that message extraction unit 601 extracts is converted to the 4th data of 2M+4 bit bit wide; M is the I road of antenna and the original bit wide of Q circuit-switched data;
The distributed base station system that the embodiment of the present invention provides as shown in Figure 7, comprising:
Radio frequency remote unit RRU 701 is used for the I/Q circuit-switched data that receives is compressed, and the data after compression is generated the message code stream, and the message code stream that generates is sent to indoor baseband processing unit BBU;
Indoor baseband processing unit BBU702, extract the payload data of message for the message code stream that sends from RRU701 as the I/Q circuit-switched data after compressing, the I/Q circuit-switched data after compression is decompressed obtain obtaining respectively I road and the Q circuit-switched data of each antenna.
The data transmission method that the embodiment of the present invention provides, device and distributed base station system, the radio frequency remote unit RRU side is compressed the I/Q circuit-switched data of each antenna, and the data after compressing generate the message code stream; RRU is sent to indoor baseband processing unit BBU with the message code stream that generates; BBU extracts I road and the Q circuit-switched data that the I/Q circuit-switched data after compressing decompresses and obtains each antenna from the message code stream after receiving the message code stream.The embodiment of the present invention is compressed the I/Q circuit-switched data of antenna in the RRU side, transmit between RRU and BBU be the compression after the I/Q circuit-switched data, can adopt and support the optical module of lower data transmission rate to transmit, the I/Q circuit-switched data after the BBU side is to compression decompresses.Thereby realized improving the link bearer rate not increasing cost, using on the basis of the optical module of supporting lower data transmission rate.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. a data transmission method, is characterized in that, comprising:
Radio frequency remote unit RRU is compressed the I/Q circuit-switched data of each antenna, and the data generating messages message code stream after compressing; Described RRU compresses the I/Q circuit-switched data, comprising:
Respectively from the first data of M the bit bit wide on I road corresponding to each antenna and Q road, extract successively M/2 bit data by higher bit position to low bit, and the exponent data of the initial bits position of the record sign data of extracting; Described M is the I road of antenna and the original bit wide of Q circuit-switched data;
The exponent data of the M/2bit data extracted and 1bit is merged into the second data of M/2+1 bit bit wide;
Second data on the I road that each antenna is corresponding and Q road are merged into the 3rd data of M+2 bit bit wide;
The 3rd adjacent data of every two transmitting times that each antenna is corresponding merge, and generate the 4th data of 2M+4 bit bit wide;
Described RRU is sent to indoor baseband processing unit BBU with the message code stream that generates;
Described BBU receives the message code stream, extracts the 4th data from the message code stream;
Described the 4th data transaction is become the 3rd data of M+2 bit bit wide;
Described the 3rd data further are split as the second data of two-way M/2+1 bit bit wide;
Extract respectively in two-way the second data the highest order data as exponent data, according to the bit of described exponent data indication, usage data zero is expanded the data of the bit of the M/2 except described exponent data in the second data, generation I road and Q circuit-switched data.
2. the method for claim 1, is characterized in that, the data after described will the compression generate the message code stream, comprising:
The 4th data that each antenna is corresponding write respectively in the first-in first-out cell fifo corresponding with each antenna;
Sense data from each cell fifo successively;
The bit width conversion of the data of reading is become to generate the required bit wide of message;
With the payload of the data after conversion as message, generate the message code stream.
3. the method for claim 1, is characterized in that, extracts I/Q circuit-switched data after compression from message, comprising:
Extract the payload data of each message;
The payload data that extracts is carried out bit width conversion, convert the 4th data of 2M+4 bit bit wide to, the I/Q circuit-switched data after being compressed.
4. a radio frequency remote unit RRU, is characterized in that, comprising:
Compression unit is used for the I/Q circuit-switched data that receives is compressed; Described I/Q circuit-switched data to reception is compressed, comprise: respectively from the first data of M the bit bit wide on I road corresponding to each antenna and Q road, extract successively M/2 bit data by higher bit position to low bit, and the exponent data of the initial bits position of the record sign data of extracting; Described M is the I road of antenna and the original bit wide of Q circuit-switched data; The exponent data of the M/2bit data extracted and 1bit is merged into the second data of M/2+1 bit bit wide; Second data on the I road that each antenna is corresponding and Q road are merged into the 3rd data of M+2 bit bit wide; The 3rd adjacent data of every two transmitting times that each antenna is corresponding merge, and generate the 4th data of 2M+4 bit bit wide;
Message m essage generation unit, the data after being used for compressing generate the message code stream, and the message code stream that generates is sent to indoor baseband processing unit BBU.
5. RRU as claimed in claim 4, is characterized in that, also comprises: read/write control unit, bit width conversion unit and first-in first-out cell fifo; Wherein:
Described read/write control unit, the 4th data after being used for compressing write the first-in first-out cell fifo corresponding with each antenna, and sense data from each cell fifo successively;
Described bit width conversion unit is for the required bit wide of bit width conversion one-tenth generation message of the data that will read;
Described message generation module also is used for the payload generation message code stream of the data after bit width conversion as message;
Described cell fifo is for the 4th data after store compressed.
6. an indoor baseband processing unit BBU, is characterized in that, comprising:
Message m essage extraction unit is used for extracting the payload data of message as the I/Q circuit-switched data after compressing from the message code stream that radio frequency remote unit RRU sends;
The bit width conversion unit is used for the payload data that described message extraction unit extracts is converted to the 4th data of 2M+4 bit bit wide; Described M is the I road of antenna and the original bit wide of Q circuit-switched data;
The data decompression unit is for the 4th data transaction being become the 3rd data of M+2 bit bit wide; The 3rd data further are split as the second data of two-way M/2+1 bit bit wide, extract respectively in two-way the second data the highest order data as exponent data, bit according to described exponent data indication, usage data zero is expanded the data of the bit of the M/2 except described exponent data in the second data, generates I road and Q circuit-switched data.
7. a distributed base station system, is characterized in that, comprising:
Radio frequency remote unit RRU is used for the I/Q circuit-switched data that receives is compressed, and with the data generating messages message code stream after compression, and the message code stream that generates is sent to indoor baseband processing unit BBU; Described I/Q circuit-switched data to reception is compressed, comprise: respectively from the first data of M the bit bit wide on I road corresponding to each antenna and Q road, extract successively M/2 bit data by higher bit position to low bit, and the exponent data of the initial bits position of the record sign data of extracting; Described M is the I road of antenna and the original bit wide of Q circuit-switched data; The exponent data of the M/2bit data extracted and 1bit is merged into the second data of M/2+1 bit bit wide; Second data on the I road that each antenna is corresponding and Q road are merged into the 3rd data of M+2 bit bit wide; The 3rd adjacent data of every two transmitting times that each antenna is corresponding merge, and generate the 4th data of 2M+4 bit bit wide;
Indoor baseband processing unit BBU is used for extracting from the message code stream that RRU sends the payload data of message, described payload data is converted to the 4th data of 2M+4 bit bit wide; Described M is the I road of antenna and the original bit wide of Q circuit-switched data; The 4th data transaction is become the 3rd data of M+2 bit bit wide; The 3rd data further are split as the second data of two-way M/2+1 bit bit wide, extract respectively in two-way the second data the highest order data as exponent data, bit according to described exponent data indication, usage data zero is expanded the data of the bit of the M/2 except described exponent data in the second data, generates I road and Q circuit-switched data.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910223372 CN102065470B (en) | 2009-11-18 | 2009-11-18 | Data transmission method, device and distributed base station system |
| PCT/CN2010/073305 WO2010148898A1 (en) | 2009-11-18 | 2010-05-27 | Method, device and distributed base station system for transmitting data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910223372 CN102065470B (en) | 2009-11-18 | 2009-11-18 | Data transmission method, device and distributed base station system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102065470A CN102065470A (en) | 2011-05-18 |
| CN102065470B true CN102065470B (en) | 2013-11-06 |
Family
ID=43385971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910223372 Active CN102065470B (en) | 2009-11-18 | 2009-11-18 | Data transmission method, device and distributed base station system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102065470B (en) |
| WO (1) | WO2010148898A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244552A (en) * | 2010-05-13 | 2011-11-16 | 中兴通讯股份有限公司 | Method and device for transmitting and receiving data |
| CN102843720B (en) * | 2011-06-24 | 2017-03-22 | 中兴通讯股份有限公司 | Method, device and system for compressing and uncompressing data in distributed base station system |
| CN102340823B (en) * | 2011-10-08 | 2014-06-11 | 中兴通讯股份有限公司 | Same-phase IQ (In-phase Quadrate) data compression method and device |
| CN102790656B (en) * | 2012-05-30 | 2015-10-28 | 新邮通信设备有限公司 | A kind of I/Q data compression method and system |
| CN103634273A (en) * | 2012-08-21 | 2014-03-12 | 电信科学技术研究院 | Data compression transmitting and decompression method and apparatus |
| CN103702363B (en) * | 2012-09-27 | 2017-02-08 | 上海贝尔股份有限公司 | Method for compressing signals from frequencies and downlink signal compressing system |
| CN104768226B (en) * | 2014-01-02 | 2018-09-04 | 中国移动通信集团公司 | A kind of baseband pool DEU data exchange unit and method |
| CN104270774B (en) * | 2014-10-23 | 2018-02-13 | 东莞宇龙通信科技有限公司 | The method and communication system of communication based on micro-base station |
| CN106550397B (en) * | 2015-09-17 | 2020-04-14 | 华为技术有限公司 | Method, device and system for transmitting wireless data |
| CN105846828A (en) * | 2016-03-23 | 2016-08-10 | 北京裕源大通科技股份有限公司 | Compression method and device of IQ data, decompression method and device of IQ data, transmission method of IQ data and transmission system of IQ data |
| CN108934073B (en) * | 2017-05-26 | 2022-03-29 | 上海华为技术有限公司 | Data transmission method, baseband unit and remote radio unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101056313A (en) * | 2007-05-30 | 2007-10-17 | 中兴通讯股份有限公司 | An IQ data transmission method between the BBU and RRU |
| CN101165510A (en) * | 2006-10-18 | 2008-04-23 | 中国科学院电子学研究所 | Spaceborne synthetic aperture radar variable digit BAQ compression system and method |
| CN101389104A (en) * | 2007-09-11 | 2009-03-18 | 京信通信系统（中国）有限公司 | Remote data real-time collecting method in radio frequency remote system |
| CN101425838A (en) * | 2007-10-30 | 2009-05-06 | 大唐移动通信设备有限公司 | Data channel configuration method and device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1960231A (en) * | 2005-10-31 | 2007-05-09 | Ut斯达康通讯有限公司 | Multichannel multiplex transmission method and system for CPRI link |
| CN101136811A (en) * | 2007-09-28 | 2008-03-05 | 中兴通讯股份有限公司 | OFDM transmission signal processing equipment, method and radio frequency far-end unit |
-
2009
- 2009-11-18 CN CN 200910223372 patent/CN102065470B/en active Active
-
2010
- 2010-05-27 WO PCT/CN2010/073305 patent/WO2010148898A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165510A (en) * | 2006-10-18 | 2008-04-23 | 中国科学院电子学研究所 | Spaceborne synthetic aperture radar variable digit BAQ compression system and method |
| CN101056313A (en) * | 2007-05-30 | 2007-10-17 | 中兴通讯股份有限公司 | An IQ data transmission method between the BBU and RRU |
| CN101389104A (en) * | 2007-09-11 | 2009-03-18 | 京信通信系统（中国）有限公司 | Remote data real-time collecting method in radio frequency remote system |
| CN101425838A (en) * | 2007-10-30 | 2009-05-06 | 大唐移动通信设备有限公司 | Data channel configuration method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010148898A1 (en) | 2010-12-29 |
| CN102065470A (en) | 2011-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102065470B (en) | Data transmission method, device and distributed base station system | |
| CN102037694B (en) | Compression of baseband signals in base transceiver systems | |
| CN102790656B (en) | A kind of I/Q data compression method and system | |
| CN102244552A (en) | Method and device for transmitting and receiving data | |
| CN101932002B (en) | Method for realizing matching between uplink transmission rate and downlink transmission rate as well as BBU and RRU | |
| CN102843720B (en) | Method, device and system for compressing and uncompressing data in distributed base station system | |
| CN103369593B (en) | A kind of method compressing reconciliation compressed ethernet message and network element device | |
| CN102316055A (en) | Base band unit, base band processing unit (BBU), remote radio unit (RRU) and base station | |
| CN102790999A (en) | Data compression, transmission, receiving and uncompressing method and corresponding device | |
| CN104581635A (en) | Method and system for transmitting locating information and device | |
| CN101706763A (en) | Method and device for serialization and deserialization | |
| US20070270185A1 (en) | Radio base station system | |
| CN112713965B (en) | Rate matching method, system and related device suitable for CPRI protocol | |
| CN102821072B (en) | Sending method, receiving method, sending system, receiving system, sending device and receiving device for IQ (In-phase quadrature) data | |
| CN104429007A (en) | Methods and device for processing digital data frames and transport frames for reduction of transport bandwidth | |
| CN110381278A (en) | Method and apparatus for color space 4:4:4 transmission | |
| CN202190284U (en) | Protocol converter for CAN bus and SpaceWire bus | |
| KR20140078308A (en) | High Speed Serial Digital Data Interface Apparatus and Method | |
| CN202103666U (en) | Radio remote unit (RRU) microwave transmission and conversion device and RRU microwave transmission system | |
| CN101159727B (en) | IQ data transmission apparatus and method | |
| CN105846828A (en) | Compression method and device of IQ data, decompression method and device of IQ data, transmission method of IQ data and transmission system of IQ data | |
| CN104917533B (en) | A kind of I/Q data compression method, device and system | |
| CN101188585B (en) | Conversion method of data sampling rate and its system in baseband signal transmission | |
| CN201898627U (en) | Digital broadband radio remote unit based on data compression | |
| CN101887255B (en) | Real-time data transmission device and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |