WO2015172277A1 - 一种基带单元bbu与远端射频单元rru之间的数据传输方法和装置 - Google Patents

一种基带单元bbu与远端射频单元rru之间的数据传输方法和装置 Download PDF

Info

Publication number
WO2015172277A1
WO2015172277A1 PCT/CN2014/077210 CN2014077210W WO2015172277A1 WO 2015172277 A1 WO2015172277 A1 WO 2015172277A1 CN 2014077210 W CN2014077210 W CN 2014077210W WO 2015172277 A1 WO2015172277 A1 WO 2015172277A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
bbu
rru
cpri
receiving antennas
Prior art date
Application number
PCT/CN2014/077210
Other languages
English (en)
French (fr)
Inventor
孙科
刘云
乐春晖
夏林峰
张超超
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2014/077210 priority Critical patent/WO2015172277A1/zh
Priority to EP14891906.1A priority patent/EP3136669A4/en
Priority to CN201480078837.6A priority patent/CN106464626B/zh
Publication of WO2015172277A1 publication Critical patent/WO2015172277A1/zh
Priority to US15/349,612 priority patent/US20170063586A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/0874—Hybrid systems, i.e. switching and combining using subgroups of receive antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • 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

Definitions

  • the present invention relates to the field of communications, and in particular, to a data transmission method and apparatus between a baseband processing unit and a remote radio unit.
  • the distributed base station divides the traditional macro base station device into two functional modules according to functions, namely, a Base Band Unit (BBU) and a Remote Radio Unit (RRU), wherein the BBU includes baseband processing and a primary Control, transmission, clock and other modules; RRU includes intermediate frequency processing, transceiver, filter, power amplifier and other modules.
  • BBU Base Band Unit
  • RRU Remote Radio Unit
  • the BBU and the RRU are connected by optical fibers, network cables, or other transmission media, and the data is transmitted by using a common Common Public Radio Interface (CPRI).
  • CPRI Common Public Radio Interface
  • the data transmission and reception structure of the base station is as shown in FIG. 1.
  • the baseband unit performs baseband processing on the data, including channel coding, constellation mapping, multiple-input multiple-output (MIMO) coding, and positive Orthogonal Frequency-Division Multiplexing (OFDM) symbol generation
  • data is sent to the RRU through the CPRI interface, and the RRU performs radio frequency processing on the data, including intermediate frequency in-phase quadrature (IQ) modulation.
  • IQ intermediate frequency in-phase quadrature
  • the RRU performs radio frequency processing on the data, including signal amplification, down-conversion, band-pass filtering, and IQ demodulation, and sends data to the BBU through the CPRI interface, and the BBU performs data processing.
  • Baseband processing including OFDM demodulation, channel estimation, MIMO decoding, and channel decoding.
  • the process of performing baseband processing on data itself is a process of adding redundancy, and in the process of downlink transmission and uplink reception, the prior art performs information compression on the CPRI port, and reduces The signal bit width is wide, and the method of compressing the data is compressed.
  • the compression ratio of information compression is currently close to the limit, and the space for further compression is limited, and as the bandwidth of wireless communication increases, the number of base transceiver antennas increases, the sector is refined, and the multi-system co-site system is widely used.
  • the data transmission volume of the CPRI interface between the BBU and the RRU in the distributed base station is larger and larger, and the required data transmission rate is larger and larger, so that the bandwidth of the transmission line between the BBU and the RRU is larger and larger, and the cost is higher.
  • the embodiment of the invention provides a data transmission method and device between a baseband unit BBU and a remote radio unit RRU, which can reduce the data transmission amount of the CPRI interface between the BBU and the RRU, thereby saving the cost of the transmission line between the BBU and the RRU.
  • the first aspect provides a data transmission method between a baseband unit BBU and a remote radio unit RRU, including: the RRU receives data through N sets of receiving antennas in the RRU; and the RRU selects the received data. Part of the data is sent to the BBU through the common public interface CPRI.
  • the RRU selects part of the data in the received data, and sends the part of the data to the BBU by using a common public interface CPRI, including: A certain group of receiving antennas of the N groups of receiving antennas, and the data received by the certain group of receiving antennas is sent to the BBU through the CPRI.
  • the RRU selects part of the data in the received data, and sends the part of the data to the common public interface CPRI.
  • the sending to the BBU includes: the RRU selecting a pilot signal in the data received on the N sets of receiving antennas, and transmitting the pilot signal to the BBU through the CPRI; the RRU selecting the N receiving antennas A certain group of receiving antennas transmits data signals in data received by the certain group of receiving antennas to the BBU through the CPRI.
  • the RRU selects part of the data in the received data, and sends the part of the data to the BBU by using a common public interface CPRI, including: the RRU is polled.
  • the method selects part of the data received by the N sets of receiving antennas, and sends the partial data to the BBU through the CPRI.
  • the RRU sequentially numbers the N groups of receiving antennas from 0; and the data received by each group of receiving antennas
  • the data signals are grouped according to an integer number of data symbols, and are sequentially numbered starting from 0; the pilot signals in the data received by each group of receiving antennas are grouped according to one pilot symbol, and sequentially numbered starting from 0;
  • the nth data signal of the data received by the mth antenna group is selected, and the nth data signal is sent to the BBU through the CPRI, and the mth antenna group is selected.
  • the nth group of pilot signals in the received data passing the nth group of pilot signals
  • the CPRI is sent to the BBU; the m is the remainder of the n divided by N, and the nth count is counted from 0.
  • the RRU selects a pilot signal in the data received by the N sets of receiving antennas, and uses the pilot signal to pass the CPRI Transmitting to the BBU; the RRU sequentially numbers the N sets of receiving antennas from 0; and data signals in the data received on the N sets of receiving antennas The numbers are grouped according to an integer number of data symbols, and are sequentially numbered starting from 0; the RRU selects the nth group of data signals in the data received by the mth group of antenna groups when nth polling the N groups of receiving antennas And transmitting the nth group of data signals to the BBU through the CPRI.
  • a second aspect provides a data transmission method between another baseband unit BBU and a remote radio unit (RRU), including: the RRU receives downlink data sent by the BBU through a common public interface CPRI, where the data is channel coded by the BBU. The processed data, or data subjected to channel coding processing and constellation mapping processing; the RRU modulates the data and performs radio frequency processing.
  • the RRU receives downlink data sent by the BBU through a common public interface CPRI, where the data is channel coded by the BBU.
  • the RRU modulates the data and performs radio frequency processing.
  • the RRU modulating the data includes: the RRU pairs the data Constellation mapping processing, multi-antenna multi-input-output MIMO encoding processing, and orthogonal frequency division multiplexing OFDM symbol generation processing are performed.
  • the data is data that is subjected to channel coding processing and constellation mapping processing by the BBU; and the RRU modulating the data includes: the RRU pair The data is subjected to MIMO encoding processing and OFDM symbol generation processing.
  • a third aspect provides a data transmission method between a baseband unit BBU and a remote radio unit RRU, including: the BBU performs channel coding processing on downlink data; and the BBU sends the processed data by using a common public interface CPRI. To the RRU, so that the RRU modulates and performs radio frequency processing on the data.
  • the method further includes: performing, by the BBU, constellation mapping on downlink data
  • the BBU sends the processed data to the RRU through the common public interface CPRI.
  • the BBU sends the channel coding process and the constellation mapping processed data to the RRU through the common public interface CPRI.
  • an apparatus for data transmission including: a receiving module, configured to receive data by using N sets of receiving antennas in the apparatus; and a processing module, configured to select part of data in the received data, The partial data is sent to the BBU through the general public interface CPRI.
  • the processing module is configured to select a part of the received data, and send the part of the data to the BBU by using a common public interface (CPRI), including:
  • the module is configured to select one of the N sets of receiving antennas, and send the data received by the certain set of receiving antennas to the BBU through the CPRI.
  • CPRI common public interface
  • the processing module is configured to select a part of the data in the received data, and send the part of the data to the BBU by using a common public interface (CPRI), including: The module is configured to select a pilot signal in the data received on the N sets of receiving antennas, and send the pilot signal to the BBU through a CPRI; the processing module is configured to select one of the N sets of receiving antennas The receiving antenna transmits the data signal in the data received by the certain group of receiving antennas to the BBU through the CPRI.
  • CPRI common public interface
  • the processing module is configured to select a part of the received data, and send the part of the data to the BBU by using a common public interface (CPRI), including:
  • CPRI common public interface
  • the module is configured to select, in a polling manner, part of the data received by the N sets of receiving antennas, and send the part of the data to the CPRI Send to BBU.
  • the processing module is configured to select, in a polling manner, part of data in the data received by the N sets of receiving antennas, The partial data is sent to the BBU through the CPRI, and the processing module is configured to sequentially sequence the N sets of receiving antennas from 0; and perform data signals in the data received by each set of receiving antennas according to an integer number of data symbols.
  • the processing module is also used for the nth time
  • the nth group of data signals in the data received by the mth group of antenna groups are selected, and the nth group of data signals are sent to the BBU through the CPRI, and the data received by the mth group of antenna groups is selected.
  • the nth group of pilot signals, the nth group of pilot signals are sent to the BBU through the CPRI; the m is a remainder of the n divided by N, and the nth time is from 0 Number.
  • the processing module is configured to select, in a polling manner, part of data in the data received by the N sets of receiving antennas, The part of the data is sent to the BBU by using the CPRI, where the processing module is configured to select a pilot signal in the data received by the N sets of receiving antennas, and transmit the pilot signal to the BBU through the CPRI; the processing module The N sets of receiving antennas are sequentially numbered starting from 0; the data signals in the data received on the N sets of receiving antennas are grouped according to an integer number of data symbols, and sequentially numbered from 0; The processing module is further configured to: when nth polling the N sets of receiving antennas, select an nth group of data signals in data received by the mth group of antenna groups, and pass the nth group of data signals The CPRI is sent to the BBU.
  • an apparatus for data transmission comprising: a receiving module, configured to receive downlink data sent by a BBU by using a common public interface CPRI, where the data is channel coding processed by the BBU Data, or data subjected to channel coding processing and constellation mapping processing; processing module, configured to modulate and perform radio frequency processing on the data.
  • the processing module when the data is channel-coded data of the BBU, the processing module is configured to modulate the data, including: the processing The module is configured to perform constellation mapping processing, multi-antenna multi-input and output MIMO encoding processing, and orthogonal frequency division multiplexing OFDM symbol generation processing on the data.
  • the data is performed by performing channel coding processing and constellation mapping processing on the BBU, and the processing module is configured to: modulate the data, where: The processing module is configured to perform the data
  • the sixth aspect provides an apparatus for data transmission, including: a processing module, configured to perform channel coding processing on downlink data, and a sending module, configured to send the processed data to an RRU by using a common public interface CPRI, In order for the RRU to modulate and perform radio frequency processing on the data.
  • a processing module configured to perform channel coding processing on downlink data
  • a sending module configured to send the processed data to an RRU by using a common public interface CPRI, In order for the RRU to modulate and perform radio frequency processing on the data.
  • the processing module is further configured to perform constellation mapping processing on the downlink data after the channel coding process, where the sending module is configured to send the device through the common public interface CPRI. Describe the processed data to the RRU specific The sending module is configured to send the channel coding process and the constellation mapping processed data to the RRU through the common public interface CPRI.
  • the RRU selects part of the data in the received data, and sends the part of the data through the common public interface CPRI.
  • the BBU performs channel coding processing or only channel coding processing and constellation mapping processing on the data, and transmits the processed data to the RRU, and the RRU performs constellation mapping processing on the data, and multi-antenna multi-input and output MIMO encoding processing.
  • the Orthogonal Frequency Division Multiplexing OFDM symbol generation process or the MIMO coding process and the OFDM symbol generation process on the data by the RRU the step of increasing the data redundancy is performed by the RRU.
  • the amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • Fig. 1 shows a schematic diagram of a base station data transceiving structure.
  • FIG. 2 is a schematic flowchart of a data transmission method between a baseband unit BBU and a remote radio unit RRU according to an embodiment of the present invention.
  • FIG. 3 is a schematic block diagram showing a data transmission method between a baseband unit BBU and a remote radio unit RRU according to an embodiment of the present invention.
  • FIG. 4 is a schematic block diagram of an apparatus for data transmission according to an embodiment of the present invention.
  • FIG. 5 is a schematic block diagram of an apparatus for data transmission according to an embodiment of the present invention.
  • FIG. 6 is a schematic block diagram of an apparatus for data transmission according to an embodiment of the present invention.
  • FIG. 7 is a schematic block diagram of an apparatus for data transmission according to an embodiment of the present invention.
  • FIG. 8 is a schematic block diagram of an apparatus for data transmission according to an embodiment of the present invention.
  • FIG. 9 is a schematic block diagram of an apparatus for data transmission according to an embodiment of the present invention. detailed description
  • LTE Long Term Evolution
  • WiMAX Worldwide Interoperability for Microwave Access
  • DAB Digital Audio Broadcasting
  • DVD Digital Video Broadcasting
  • WLAN Wireless Local Area Networks
  • FIG. 2 is a schematic flowchart of a data transmission method between a baseband unit BBU and a remote radio unit RRU according to an embodiment of the present invention.
  • the RRU sends part of the data in the received data to the BBU through the CPRI.
  • the method includes:
  • the RRU receives data through the N groups of receiving antennas in the RRU.
  • the receiving antennas in the RRU are divided into N groups, and N is a positive integer greater than 1.
  • N group each group of receiving antennas may be one or more, and the present invention is not limited thereto.
  • the RRU selects part of the data in the received data, and sends the part of data to the BBU through a common public interface CPRI.
  • the RRU sends all the data received by the receiving antenna to the BBU through the CPRI in the prior art.
  • the RRU selects part of the data in the received data and sends the data to the BBU through the CPRI.
  • the amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the data may include a data signal and a pilot signal;
  • the data signal is composed of data symbols, and may be a data single carrier frequency division multiple access (Single-carrier) in the embodiment of the present invention.
  • Frequency-Division Multiple Access (SC-FDMA) symbol but the present invention is not limited thereto;
  • the pilot signal is composed of pilot symbols, which may be a pilot SC-FDMA symbol in the embodiment of the present invention, but the present invention Not limited.
  • S202 may specifically include: the RRU selects one of the N groups of receiving antennas, and sends the data received by the certain group of receiving antennas to the BBU through the CPRI.
  • the data received by the N sets of receiving antennas is different in the data transmitted by the data source. Therefore, the data received by a certain group of antennas is transmitted to the BBU through the CPRI and the data loss is not transmitted.
  • the RRU transmits the data received by all the receiving antennas to the BBU through the CPRI in the prior art.
  • the RRU transmits the data received by a certain group of the receiving antennas of the N groups of receiving antennas to the BBU through the CPRI.
  • the amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the S202 may include: the RRU selects a pilot signal in the data received on the N sets of receiving antennas, and sends the pilot signal to the BBU through the CPRI; the RRU selects the N group.
  • a certain group of receiving antennas in the receiving antenna, and the data signals in the data received by the certain group of receiving antennas are transmitted to the BBU through the CPRI.
  • the manner in which the RRU selects one of the N sets of receiving antennas may be randomly selected or selected according to a certain rule, which is not limited by the present invention.
  • the role of the pilot signal in the data is mainly used for demodulation, so the RRU transmits the pilot signal and part of the data signal to the BBU, which also ensures the integrity of the data transmission.
  • the RRU will guide the data received by all receiving antennas.
  • the frequency signal and the data information are transmitted to the BBU through the CPRI.
  • the RRU sends the pilot signal in the data received by the N sets of receiving antennas to the BBU, and the set of receiving antennas on the N sets of receiving antennas
  • the data signal in the received data is transmitted to the BBU.
  • the amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the S202 may include: the RRU selects, in a polling manner, part of the data received by the N sets of receiving antennas, and sends the part of the data to the BBU through the CPRI.
  • the RRU selects part of the data received by the N sets of receiving antennas in a polling manner, and sends the part of the data to the BBU through the CPRI. Specifically, the RRU sequentially numbers the N sets of receiving antennas from 0.
  • the data signals in the data received by each group of receiving antennas are grouped according to an integer number of data symbols, and numbered sequentially from 0; the pilot signals in the data received by each group of receiving antennas are grouped according to a pilot symbol.
  • the RRU polls the three sets of receiving antennas at the 0th time, the 0th (0 is 0 divided by 3) group 0 receiving the data of the 0th group of data received by the antenna, and the data received by the 0th group receiving antenna is selected.
  • Group 0 The data signal is sent to the BBU through the CPRI, and the 0th group pilot signal in the data received in the 0th group receiving antenna is sent to the BBU through the CPRI; when the RRU polls the 3 groups of receiving antennas for the first time, the 1st (1) is selected.
  • the first group of data signals in the data received by the antenna is received by the group of receiving antennas, and the first group of data signals received by the first group of receiving antennas are sent to the BBU through the CPRI, and the first group of receiving antennas is received.
  • the first group of pilot signals in the received data are sent to the BBU through the CPRI; when the RRU polls the three groups of receiving antennas for the second time, the second (2 is the remainder of 2 divided by 3) group receives the data received by the receiving antenna.
  • the second group of data signals, the second group of data signals received by the second group of receiving antennas are sent to the BBU through the CPRI, and the second group of pilot signals of the data received by the second group of receiving antennas are sent to the BBU through the CPRI;
  • the RRU polls the three sets of receiving antennas for the third time the third group of data signals of the data received by the receiving antennas of the 0th (0 is 3 divided by 3) group are transmitted to the BBU, and the third group receiving antennas are received.
  • the third set of pilot signals in the data is sent to the BBU through the CPRI; the RRU polls the 4th time.
  • the fourth group of data signals received by the receiving antennas of the first (1 is 4 divided by 3) group are transmitted to the BBU, and the fourth group of pilots in the data received by the first group of receiving antennas
  • the signal is sent to the BBU via CPRI, and so on.
  • the RRU sends the pilot signal and the data signal in the data received by all the receiving antennas to the BBU through the CPRI.
  • the RRU receives each of the N groups of receiving antennas. Part of the data symbols and part of the pilot symbols in the data received by the antenna are sent to the BBU. The amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the RRU selects the part of the data received by the N sets of receiving antennas in a polling manner.
  • the data is sent to the BBU through the CPRI, and the RRU may be: the RRU selects a pilot signal in the data received by the N sets of receiving antennas, and sends the pilot signal to the BBU through the CPRI; the RRU
  • the N sets of receiving antennas are sequentially numbered starting from 0; the data signals in the data received on the N sets of receiving antennas are grouped according to an integer number of data symbols, and sequentially numbered from 0; the RRU polls the nth time.
  • the nth data signal in the data received by the mth antenna group is selected, and the nth data signal is sent to the BBU through the CPRI, and each set of data signals is composed of an integer number of data symbols. This way is consistent with the way the data signal in the received data is processed in the previous mode.
  • the RRU transmits the pilot signal and the data signal in the data received by all the receiving antennas to the BBU through the CPRI.
  • the RRU receives each of the N groups of receiving antennas. Part of the data symbols and all pilot symbols in the data received by the antenna are sent to the BBU. The amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • FIG. 3 is a schematic block diagram showing a data transmission method between a baseband unit BBU and a remote radio unit RRU according to an embodiment of the present invention.
  • the method embodiment includes:
  • the BBU performs channel coding processing on the downlink data.
  • the process of channel coding specifically includes: Cyclic Redundancy Check (CRC), code block segmentation, coded block CRC, channel coding, rate allocation and code block cascading, bit scrambling, Interwoven.
  • CRC Cyclic Redundancy Check
  • the BBU may perform channel coding processing and constellation mapping on the downlink data, where the process of constellation mapping includes mapping processing from bit to constellation; the process of MIMO coding includes mapping of spatial layer, precoding or beamforming (Beamforming, referred to as BF).
  • the BBU performs channel coding, constellation mapping, multi-antenna multi-input and output MIMO coding, and orthogonal frequency division multiplexing (OFDM) symbol generation on downlink data.
  • These data processing methods are all processes that increase data redundancy.
  • the BBU performs channel coding on the downlink data index or only performs channel coding and constellation mapping, and other processing steps for increasing data redundancy are performed by the RRU, which greatly reduces the amount of data transmitted through the CPRI. Effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the BBU sends the processed data to the RRU through the CPRI.
  • the data sent by the BBU to the RRU through the CPRI may be that the BBU sends the channel-coded data to the RRU through the CPRI or the BBU may send the data processed by the channel coding process and the constellation mapping to the RRU through the CPRI.
  • the RRU modulates the data and performs radio frequency processing.
  • If the data is channel-coded data of the BBU
  • the RRU modulates the data, specifically, the RRU performs constellation mapping on the data, multi-antenna multi-input and output MIMO coding, and orthogonal frequency division multiplexing (OFDM) symbol generation.
  • OFDM orthogonal frequency division multiplexing
  • the RRU performs radio frequency processing on the data, specifically, the RRU performs IQ modulation, intermediate frequency filtering, up-conversion, and power amplifier processing on the data.
  • the BBU performs channel coding processing and constellation mapping on the data
  • the BBU transmits the processed data to the RRU through the CPRI through the CPRI
  • the RRU The data is modulated and subjected to radio frequency processing, that is, when the data is channel coding processing and constellation mapping processing data of the BBU, the RRU modulates the data, and the RRU modulates the data, specifically, the RRU performs the data.
  • MIMO coding orthogonal frequency division multiplexing, OFDM symbol generation.
  • the BBU performs baseband processing on the data through an internal Field Programmable Gate Array (“FPGA") chip, such as channel coding, constellation mapping, MIMO encoding, and OFDM symbol generation processing, and the RRU also includes an FPGA.
  • FPGA Field Programmable Gate Array
  • the BBU performs channel coding processing only on the data, and transmits the channel coding processed data to the RRU through the CPRI.
  • the RRU performs the modulation process performed by the BBU before, and then performs the radio frequency processing on the data; or the BBU performs channel coding processing and constellation mapping processing on the data, and transmits the channel coding processed data to the RRU through the CPRI, which is performed by the RRU.
  • the modulation process performed by the BBU after which the data is subjected to radio frequency processing.
  • the modulation processing of the data by the BBU is a process of adding redundancy, part of the process is now performed after the data is transmitted to the RRU, so that the amount of data transmitted through the CPRI is greatly reduced. Effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • FIG. 4 is a schematic block diagram of an apparatus for data transmission provided by an embodiment of the present invention, which may be a baseband unit BBU, but the invention is not limited thereto.
  • Embodiment of the present invention The apparatus provided may apply the method provided by the embodiment of the invention illustrated in FIG. 2.
  • the device for data transmission includes:
  • the receiving module 401 is configured to receive data by the N groups of receiving antennas in the device. Specifically, the receiving antennas in the device are divided into N groups, and N is a positive integer greater than 1. In the N group, each group of receiving antennas may be one or more, and the present invention is not limited thereto.
  • the processing module 402 is configured to select part of the data in the received data, and send the part of the data to the BBU through a common public interface CPRI.
  • the RRU sends all the data received by the receiving antenna to the BBU through the CPRI in the prior art.
  • the RRU selects part of the data in the received data and sends the data to the BBU through the CPRI.
  • the amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the processing module 402 may be configured to select a certain group of receiving antennas of the N groups of receiving antennas, and send data received by the certain group of receiving antennas to the BBU through the CPRI.
  • the RRU transmits the data received by all the receiving antennas to the BBU through the CPRI in the prior art.
  • the RRU sends the data received by a certain group of the receiving antennas of the N groups of receiving antennas to the BBU through the CPRI.
  • the amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the processing module 402 is configured to select a pilot signal in the data received on the N sets of receiving antennas, and pass the pilot signal to the CPRI.
  • the processing module 402 is configured to select one of the N groups of receiving antennas, and send data signals in the data received by the certain group of receiving antennas to the BBU through the CPRI.
  • the manner in which the processing module 402 selects a certain one of the N sets of receiving antennas may be randomly selected or selected according to a certain rule, which is not limited by the present invention.
  • the RRU transmits the pilot signal and the data information in the data received by all the receiving antennas to the BBU through the CPRI.
  • the RRU receives the data received by the N groups of receiving antennas.
  • the pilot signal is sent to the BBU, and the data signal in the received data on a certain group of receiving antennas on the N sets of receiving antennas is transmitted to the BBU.
  • the amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the processing module 402 is configured to select part of the data received by the N sets of receiving antennas in a polling manner, and send the partial data to the BBU through the CPRI.
  • the processing module 402 is configured to: in a polling manner, select a part of the data received by the N sets of receiving antennas, and send the part of the data to the BBU by using the CPRI, where the processing module 402 is configured to: The group receiving antennas are sequentially numbered starting from 0; the data signals in the data received by each group of receiving antennas are grouped according to an integer number of data symbols, and numbered sequentially from 0; pilots in data received by each group of receiving antennas The signals are grouped according to a pilot symbol, and are sequentially numbered starting from 0.
  • the processing module 402 is further configured to select the nth group of data received by the mth group of antenna groups when the N groups of receiving antennas are polled for the nth time.
  • nth group of data signals transmitting the nth group of data signals through a CPRI Up to the BBU, selecting the nth pilot signal in the data received by the mth antenna group, and transmitting the nth group pilot signal to the BBU through the CPRI; the m is the remainder of the n divided by N, The nth time is counted from 0.
  • the RRU transmits the pilot signal and the data signal in the data received by all the receiving antennas to the BBU through the CPRI.
  • the RRU receives each of the N groups of receiving antennas. Part of the data symbols and part of the pilot symbols in the data received by the antenna are sent to the BBU. The amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the processing module 402 is configured to select a part of the data received by the N sets of receiving antennas in a polling manner, and send the part of the data to the BBU through the CPRI.
  • the processing module 402 is configured to select the N.
  • the group receives the pilot signal in the data received by the antenna, and transmits the pilot signal to the BBU through the CPRI;
  • the processing module 402 is further configured to sequentially sequence the N groups of receiving antennas from 0;
  • the data signals in the data received on the antenna are grouped according to an integer number of data symbols, and are sequentially numbered starting from 0.
  • the processing module 402 is further configured to select the mth antenna when nth polling the N groups of receiving antennas.
  • the nth group of data signals in the group received data, and the nth group of data signals are sent to the BBU through the CPRI.
  • the RRU transmits the pilot signal and the data signal in the data received by all the receiving antennas to the BBU through the CPRI.
  • the RRU receives each of the N groups of receiving antennas. Part of the data symbol and data in the data received by the antenna The pilot symbols are sent to the BBU. The amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • FIG. 5 is a schematic block diagram of an apparatus for data transmission according to an embodiment of the present invention.
  • the apparatus may be a remote radio unit RRU, but the invention is not limited thereto.
  • the apparatus provided by the embodiment of the present invention can apply the method provided by the embodiment of the present invention shown in FIG.
  • the device for data transmission includes:
  • the receiving module 501 is configured to receive, by using a common public interface CPRI, downlink data sent by the BBU, where the data is channel-coded data processed by the BBU, or data processed by channel coding processing and constellation mapping processing;
  • the processing module 502 is configured to perform modulation and medium radio frequency processing on the data.
  • the processing module 502 is configured to modulate the data, and the processing module 502 is configured to modulate the data, specifically, the RRU performs the data, where the data is the channel coded data of the BBU. Constellation mapping, multi-antenna multiple input and output MIMO encoding, orthogonal frequency division multiplexing OFDM symbol generation.
  • the processing module 502 is configured to perform radio frequency processing on the data, and the processing module 502 is specifically configured to perform IQ modulation, intermediate frequency filtering, up-conversion, and power amplifier processing on the data.
  • the processing module 502 is configured to modulate the data, and the processing module 502 is specifically configured to perform the data.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the apparatus for data transmission since the BBU is only The data is subjected to channel coding processing, and the data subjected to the channel coding process is transmitted to the RRU through the CPRI, the modulation process previously performed by the BBU by the RRU is performed, and then the radio frequency processing is performed on the data; or the BBU performs channel coding processing and constellation mapping on the data. Processing, the data subjected to the channel coding process is transmitted to the RRU through the CPRI, and the RRU performs the modulation process previously performed by the BBU, and then performs the radio frequency processing on the data.
  • the modulation of data by the BBU is a process of adding redundancy, part of the process is now performed after the data is transmitted to the RRU, so that the amount of data transmitted through the CPRI is greatly reduced. Effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • FIG. 6 is a schematic block diagram of an apparatus for data transmission according to an embodiment of the present invention.
  • the apparatus may be a BBU, but the present invention is not limited thereto.
  • the apparatus provided by the embodiment of the present invention may apply the method provided by the embodiment of the present invention shown in FIG.
  • the device for data transmission includes:
  • the processing module 601 is configured to perform channel coding processing on the downlink data.
  • the sending module 602 is configured to send the processed data to the RRU through the common public interface CPRI, so that the RRU performs modulation and medium radio frequency processing on the data.
  • the processing module 601 is further configured to perform constellation mapping processing on the downlink data after the channel coding process, where the sending module 602 is configured to send the processed data to the RRU by using the common public interface CPRI: The module 602 is configured to send the channel coding process and the constellation mapping processed data to the current through the common public interface CPRI, and the BBU performs channel coding, constellation mapping, and multiple antenna multiple input on the downlink data.
  • the BBU performs channel coding on the downlink data index or only performs channel coding and constellation mapping, and other processing steps for increasing data redundancy are performed by the RRU, which greatly reduces the amount of data transmitted through the CPRI. Effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • FIG. 7 is a schematic block diagram of an apparatus for data transmission according to an embodiment of the present invention.
  • the apparatus may be a baseband unit BBU, but the invention is not limited thereto.
  • the apparatus provided by the embodiment of the present invention can apply the method provided by the embodiment of the present invention shown in FIG.
  • the apparatus for data transmission includes:
  • the receiver 701 is configured to receive data by the N groups of receiving antennas in the device; specifically, the receiving antennas in the device are divided into N groups, and N is a positive integer greater than 1.
  • each group of receiving antennas may be one or more, and the present invention is not limited thereto.
  • the processor 702 is configured to select part of the data in the received data, and send the part of the data to the BBU through a common public interface CPRI.
  • the RRU sends all the data received by the receiving antenna to the BBU through the CPRI in the prior art.
  • the RRU selects part of the data in the received data and sends the data to the BBU through the CPRI.
  • the amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the processor 702 may be configured to select one of the N sets of receiving antennas, and pass the data received by the certain set of receiving antennas.
  • the CPRI is sent to the BBU.
  • the RRU transmits the data received by all the receiving antennas to the BBU through the CPRI in the prior art.
  • the RRU transmits the data received by a certain group of the receiving antennas of the N groups of receiving antennas to the BBU through the CPRI.
  • the amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the processor 702 may be configured to select a pilot signal in the data received on the N sets of receiving antennas, and send the pilot signal to the BBU through the CPRI; the processor 702 It may be used to select one of the N sets of receiving antennas, and send data signals in the data received by the certain set of receiving antennas to the BBU through the CPRI.
  • the manner in which the processor 702 selects one of the N sets of receiving antennas to receive the antenna may be randomly selected or selected according to a certain rule, which is not limited by the present invention.
  • the RRU transmits the pilot signal and the data information in the data received by all the receiving antennas to the BBU through the CPRI.
  • the RRU receives the data received by the N groups of receiving antennas.
  • the pilot signal is sent to the BBU, and the data signal in the received data on a certain group of receiving antennas on the N sets of receiving antennas is transmitted to the BBU.
  • the amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the processor 702 is configured to select, in a polling manner, part of the data received by the N sets of receiving antennas, and send the partial data to the BBU through the CPRI.
  • the processor 702 is configured to: in a polling manner, select a part of data in the data received by the N sets of receiving antennas, and send the part of the data to the BBU by using the CPRI, where the processor 702 is configured to:
  • the group receiving antennas are sequentially numbered starting from 0; the data signals in the data received by each group of receiving antennas are grouped according to an integer number of data symbols, and numbered sequentially from 0; pilots in data received by each group of receiving antennas
  • the signals are grouped according to a pilot symbol, and are sequentially numbered starting from 0;
  • the processor 702 is further configured to select the nth group of data received by the mth group of antenna groups when the N groups of receiving antennas are polled for the nth time.
  • the nth group of data signals are sent to the BBU through the CPRI, the nth group of pilot signals in the data received by the mth antenna group are selected, and the nth group of pilot signals are sent to the BBU through the CPRI;
  • the m is a remainder of the n divided by N, and the nth time is counted from 0.
  • the RRU transmits the pilot signal and the data signal in the data received by all the receiving antennas to the BBU through the CPRI.
  • the RRU receives each of the N groups of receiving antennas. Part of the data symbols and part of the pilot symbols in the data received by the antenna are sent to the BBU. The amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the processor 702 is configured to select, in a polling manner, part of the data received by the N sets of receiving antennas, and send the part of the data to the BBU by using the CPRI.
  • the processor 702 is configured to select the N.
  • the group receives the pilot signal in the data received by the antenna, and transmits the pilot signal to the BBU through the CPRI;
  • the processor 702 is further configured to sequentially sequence the N groups of receiving antennas from 0; Number received on the antenna
  • the data signals according to the data are grouped according to an integer number of data symbols, and are sequentially numbered starting from 0;
  • the processor 702 is further configured to select the data received by the mth antenna group when the N groups of receiving antennas are polled for the nth time.
  • the CPRI is sent to the BBU.
  • the RRU transmits the pilot signal and the data signal in the data received by all the receiving antennas to the BBU through the CPRI.
  • the RRU receives each of the N groups of receiving antennas. Part of the data symbols and all pilot symbols in the data received by the antenna are sent to the BBU. The amount of data transmitted through the CPRI is greatly reduced, which can effectively reduce the data transmission rate between the BBU and the RRU, and save the BBU and
  • the processor may be a central processing unit (Central)
  • the processor can also be other general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs), or other programmable logic devices. Discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the above steps may be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the foregoing method. To avoid repetition, it will not be described in detail here.
  • the apparatus may be a remote radio unit RRU, but the invention is not limited thereto.
  • the apparatus provided by the embodiment of the present invention may apply the method provided by the embodiment of the present invention shown in FIG.
  • the apparatus for data transmission includes:
  • the receiver 801 is configured to receive the downlink data sent by the BBU by using the common public interface CPRI, where the data is channel-coded data processed by the BBU, or data processed by channel coding processing and constellation mapping processing;
  • the processor 802 is configured to perform modulation and medium radio frequency processing on the data.
  • the processor 802 is configured to modulate the data, where the processor 802 is configured to modulate the data, specifically, the RRU performs the data on the data.
  • the processor 802 is configured to perform radio frequency processing on the data, and the processor 802 is specifically configured to perform IQ modulation, intermediate frequency filtering, up-conversion, and power amplifier processing on the data.
  • the processor 802 is configured to modulate the data, where the processor 802 is specifically configured to perform the data.
  • the BBU performs channel coding processing only on the data
  • the data subjected to the channel coding processing is transmitted to the RRU through the CPRI
  • the modulation processing by the BBU is performed by the RRU, and thereafter Performing radio frequency processing on the data; or performing channel coding processing and constellation mapping processing on the data by the BBU
  • the data subjected to the channel coding process is transmitted to the RRU through the CPRI, and the RRU performs the modulation process previously performed by the BBU, and then performs the radio frequency processing on the data.
  • the modulation of data by the BBU is a process of adding redundancy, part of the process is now performed after the data is transmitted to the RRU, so that the amount of data transmitted through the CPRI is greatly reduced. Effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the processor may be a central processing unit (“CPU"), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and more.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the above steps may be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the foregoing method. To avoid repetition, it will not be described in detail here.
  • the apparatus may be a BBU, but the present invention is not limited thereto.
  • the apparatus provided by the embodiment of the present invention may apply the method provided by the embodiment of the present invention shown in FIG.
  • the apparatus for data transmission includes:
  • the processor 901 is configured to perform channel coding processing on the downlink data
  • the transmitter 902 is configured to send the processed data to the RRU by using the common public interface CPRI, so that the RRU performs modulation and medium radio frequency processing on the data. .
  • the processor 901 is further configured to perform constellation mapping processing on the downlink data that is subjected to the channel coding process, where the sending module is configured to send the processed data to the RRU by using the common public interface CPRI: The sending module is configured to send the channel coding process and the constellation mapping processed data to the RRU through the common public interface CPRI.
  • the BBU performs channel coding, constellation mapping, multi-antenna multi-input and output MIMO coding, and orthogonal frequency division multiplexing (OFDM) symbol generation on downlink data.
  • These data processing methods are all processes that increase data redundancy.
  • the BBU performs channel coding on the downlink data index or only performs channel coding and constellation mapping, and other processing steps for increasing data redundancy are performed by the RRU, which greatly reduces the amount of data transmitted through the CPRI. Effectively reduce the data transmission rate between the BBU and the RRU, and save the cost of the transmission line between the BBU and the RRU.
  • the processor may be a central processing unit (“CPU"), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (ASIC), off-the-shelf programmable gate arrays
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the above steps may be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. Steps in conjunction with the method disclosed in the embodiments of the present invention
  • the steps can be directly implemented as hardware processor execution or by a combination of hardware and software modules in the processor.
  • the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the foregoing method. To avoid repetition, it will not be described in detail here.

Landscapes

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

Abstract

本发明公开了一种基带处理单元BBU与远端射频单元RRU之间的数据传输方法和装置，其中，RRU选择接收数据中的部分数据，将该部分数据通过通用公共接口CPRI发送至BBU；或者，BBU对数据只进行信道编码处理或只进行信道编码处理和星座映射处理，将经处理的数据发送至RRU，由RRU对数据进行星座映射处理、多天线多输入输出MIMO编码处理和正交频分复用OFDM符号生成处理或者由 RRU对数据进行MIMO编码处理和OFDM符号生成处理，即将增加数据冗余的步骤部分由RRU执行。由此使得通过CPRI传输的数据量大幅度减少，这样可以有效降低BBU与RRU之间数据的传输速率，节省BBU与RRU之间传输线的成本。

Description

一种基带单元 BBU与远端射频单元 RRU之间的数据传输方法和 装置
技术领域
本发明涉及通信领域，具体涉及一种基带处理单元与远端射频单 元之间的数据传输方法和装置。
背景技术
分布式基站将传统的宏基站设备按照功能划分为两个功能模块， 即基带单元（Base band Unit, 简称 BBU )和远端射频单元（Remote Radio Unit, 简称 RRU ) ， 其中 BBU包括基带处理、 主控、 传输、 时 钟等模块； RRU包括中频处理、 收发信机、 滤波器、 功放等模块。
在分布式基站中， BBU和 RRU之间通过光纤、 网线或者其他传 输媒介进行连接， 釆用统一的通用公共无线接口 （ Common Public Radio Interface, 简称 CPRI )传输数据。 当前， 基站数据收发结构如 图 1所示， 下行发射中， 基带单元对数据进行基带处理， 包括信道编 码、 星座映射、 多天线多输入输出 （Multiple-Input Multiple-Output, 简称 MIMO )编码和正交频分复用 （ Orthogonal Frequency-Division Multiplexing， 简称 OFDM )符号生成， 通过 CPRI接口将数据发送至 RRU, RRU对数据进行中射频处理， 包括中频同相正交（in-phase quadrature, 简称 IQ )调制、 中频滤波、 上变频和功放处理； 上行接 收中， RRU对数据进行中射频处理， 包括信号放大、 下变频、 带通 滤波、 IQ解调， 通过 CPRI接口将数据发送至 BBU， BBU对数据进 行基带处理， 包括 OFDM解调、信道估计、 MIMO译码和信道译码。 现有技术中， 对于下行发送， 对数据进行基带处理的过程本身就 是一个添加冗余的过程， 且无论对于下行发送和上行接收的过程中， 现有技术都通过在 CPRI口进行信息压缩， 消减信号比特位宽， 降釆 样等方法压缩数据。 但是当前进行信息压缩的压缩比基本接近极限， 进行进一步压缩的空间有限， 且随着无线通信带宽的增加、基站收发 天线数的加大、扇区的细化以及多制式共站系统的广泛应用， 分布式 基站中 BBU与 RRU之间 CPRI接口的数据传输量越来越大，要求的 数据传输速率越来越大，使得 BBU与 RRU之间传输线的带宽越来越 大， 成本越来越高。 发明内容
本发明实施例提供一种基带单元 BBU与远端射频单元 RRU之间 的数据传输方法和装置， 能够降低 BBU与 RRU之间 CPRI接口的数据 传输量， 进而节省 BBU与 RRU之间传输线的成本。
第一方面，提供了一种基带单元 BBU与远端射频单元 RRU之间的 数据传输方法， 包括： 所述 RRU通过所述 RRU中的 N组接收天线接收 数据； 所述 RRU选择所述接收数据中的部分数据， 将所述部分数据通 过通用公共接口 CPRI发送至 BBU。
结合第一方面，在第一种可能的实现方式中， 所述 RRU选择所述 接收数据中的部分数据， 将所述部分数据通过通用公共接口 CPRI发 送至 BBU， 包括： 所述 RRU选择所述 N组接收天线中的某一组接收天 线， 将所述某一组接收天线接收的数据通过 CPRI发送至 BBU。
结合第一方面，在第二种可能的实现方式中， 所述 RRU选择所述 接收数据中的部分数据， 将所述部分数据通过通用公共接口 CPRI发 送至 BBU， 包括： 所述 RRU选择所述 N组接收天线上接收的数据中的 导频信号， 将所述导频信号通过 CPRI发送至 BBU; 所述 RRU选择所 述 N组接收天线中的某一组接收天线， 将所述某一组接收天线接收的 数据中的数据信号通过 CPRI发送至 BBU。
结合第一方面，在第三种可能的实现方式中， 所述 RRU选择所述 接收数据中的部分数据， 将所述部分数据通过通用公共接口 CPRI发 送至 BBU， 包括： 所述 RRU以轮询的方式选择所述 N组接收天线接收 的数据中的部分数据， 将所述部分数据通过 CPRI发送至 BBU。
结合第一方面的第三种可能的实现方式，在第四种可能的实现方 式中， 所述 RRU将所述 N组接收天线从 0开始依次进行编号； 将每组 接收天线接收的数据中的数据信号按照整数个数据符号进行分组，并 从 0开始依次进行编号； 将每组接收天线接收的数据中的导频信号按 照一个导频符号进行分组， 并从 0开始依次进行编号； 所述 RRU在第 n 次轮询该 N组接收天线时，选择第 m组天线组接收的数据中的第 n组数 据信号， 将所述第 n组数据信号通过 CPRI发送至 BBU， 选择第 m组天 线组接收的数据中的第 n组导频信号， 将所述第 n组导频信号通过
CPRI发送至 BBU; 所述 m为所述 n除以 N的余数， 所述第 n次为从 0开 始计数。
结合第一方面的第三种可能的实现方式，在第五种可能的实现方 式中， 所述 RRU选择所述 N组接收天线接收的数据中的导频信号， 将 所述导频信号通过 CPRI传输至 BBU;所述 RRU将所述 N组接收天线从 0开始依次进行编号； 将所述 N组接收天线上接收的数据中的数据信 号按照整数个数据符号进行分组，并从 0开始依次进行编号；所述 RRU 在第 n次轮询所述 N组接收天线时，选择第 m组天线组接收的数据中的 第 n组数据信号， 将所述第 n组数据信号通过 CPRI发送至 BBU。
第二方面，提供了另一种基带单元 BBU与远端射频单元 RRU之间 的数据传输方法， 包括： RRU通过通用公共接口 CPRI接收 BBU发送 的下行数据， 所述数据为所述 BBU进行信道编码处理后的数据， 或者 进行信道编码处理和星座映射处理后的数据；所述 RRU对所述数据进 行调制和中射频处理。
结合第二方面， 在第一种可能的实现方式中， 当所述数据为所述 BBU进行信道编码处理后的数据时，所述 RRU对所述数据进行调制包 括： 所述 RRU对所述数据进行星座映射处理、 多天线多输入输出 MIMO编码处理和正交频分复用 OFDM符号生成处理。
结合第二方面， 在第二种可能的实现方式中， 所述数据为所述 BBU进行信道编码处理和星座映射处理后的数据；则所述 RRU对所述 数据进行调制包括： 所述 RRU对所述数据进行 MIMO编码处理和 OFDM符号生成处理。
第三方面，提供了一种基带单元 BBU与远端射频单元 RRU之间的 数据传输方法， 包括： BBU对下行数据进行信道编码处理； 所述 BBU 通过通用公共接口 CPRI发送所述处理后的数据至 RRU， 以便于所述 RRU对所述数据进行调制和中射频处理。
结合第三方面， 在第一种可能的实现方式中， 所述 BBU对下行数 据进行信道编码处理后，还包括： 所述 BBU对下行数据进行星座映射 处理， 则所述 BBU通过通用公共接口 CPRI发送所述处理后的数据至 RRU具体为： 所述 BBU通过通用公共接口 CPRI发送所述信道编码处 理和星座映射处理后的数据至 RRU。
第四方面， 提供了一种用于数据传输的装置， 包括： 接收模块， 用于通过所述装置中的 N组接收天线接收数据； 处理模块， 用于选择 所述接收数据中的部分数据， 将所述部分数据通过通用公共接口 CPRI发送至 BBU。
结合第四方面， 在第一种可能的实现方式中， 所述处理模块用于 选择所述接收数据中的部分数据，将所述部分数据通过通用公共接口 CPRI发送至 BBU， 包括： 所述处理模块用于选择所述 N组接收天线中 的某一组接收天线， 将所述某一组接收天线接收的数据通过 CPRI发 送至 BBU。
结合第四方面， 在第二种可能的实现方式中， 所述处理模块用于 选择所述接收数据中的部分数据，将所述部分数据通过通用公共接口 CPRI发送至 BBU， 包括： 所述处理模块用于选择所述 N组接收天线上 接收的数据中的导频信号， 将所述导频信号通过 CPRI发送至 BBU; 所述处理模块用于选择所述 N组接收天线中的某一组接收天线， 将所 述某一组接收天线接收的数据中的数据信号通过 CPRI发送至 BBU。
结合第四方面， 在第三种可能的实现方式中， 所述处理模块用于 选择所述接收数据中的部分数据，将所述部分数据通过通用公共接口 CPRI发送至 BBU， 包括： 所述处理模块用于以轮询的方式选择所述 N 组接收天线接收的数据中的部分数据， 将所述部分数据通过 CPRI发 送至 BBU。
结合第四方面的第三种可能的实现方式，在第四种可能的实现方 式中， 所述处理模块用于以轮询的方式选择所述 N组接收天线接收的 数据中的部分数据， 将所述部分数据通过 CPRI发送至 BBU， 包括:所 述处理模块用于将所述 N组接收天线从 0开始依次进行编号； 将每组 接收天线接收的数据中的数据信号按照整数个数据符号进行分组，并 从 0开始依次进行编号； 将每组接收天线接收的数据中的导频信号按 照一个导频符号进行分组， 并从 0开始依次进行编号； 所述处理模块 还用于在第 n次轮询该 N组接收天线时，选择第 m组天线组接收的数据 中的第 n组数据信号， 将所述第 n组数据信号通过 CPRI发送至 BBU， 选择第 m组天线组接收的数据中的第 n组导频信号， 将所述第 n组导频 信号通过 CPRI发送至 BBU; 所述 m为所述 n除以 N的余数， 所述第 n次 为从 0开始计数。
结合第四方面的第三种可能的实现方式，在第五种可能的实现方 式中， 所述处理模块用于以轮询的方式选择所述 N组接收天线接收的 数据中的部分数据， 将所述部分数据通过 CPRI发送至 BBU， 包括:所 述处理模块用于选择所述 N组接收天线接收的数据中的导频信号， 将 所述导频信号通过 CPRI传输至 BBU;所述处理模块还用于将所述 N组 接收天线从 0开始依次进行编号； 将所述 N组接收天线上接收的数据 中的数据信号按照整数个数据符号进行分组， 并从 0开始依次进行编 号； 所述处理模块还用于在第 n次轮询所述 N组接收天线时， 选择第 m 组天线组接收的数据中的第 n组数据信号，将所述第 n组数据信号通过 CPRI发送至 BBU。
第五方面，提供了一种用于数据传输的装置，其特征在于，包括： 接收模块， 用于通过通用公共接口 CPRI接收 BBU发送的下行数据， 所述数据为所述 BBU进行信道编码处理后的数据，或者进行信道编码 处理和星座映射处理后的数据； 处理模块， 用于对所述数据进行调制 和中射频处理。
结合第五方面， 在第一种可能的实现方式中， 当所述数据为所述 BBU进行信道编码处理后的数据时，所述处理模块用于对所述数据进 行调制， 包括： 所述处理模块用于对所述数据进行星座映射处理、 多 天线多输入输出 MIMO编码处理和正交频分复用 OFDM符号生成处 理。
结合第五方面， 在第二种可能的实现方式中， 所述数据为所述 BBU进行信道编码处理和星座映射处理后的数据；则所述处理模块用 于对所述数据进行调制包括： 所述处理模块用于对所述数据进行
MIMO编码处理和 OFDM符号生成处理。
第六方面， 提供了一种用于数据传输的装置， 包括： 处理模块， 用于对下行数据进行信道编码处理； 发送模块， 用于通过通用公共接 口 CPRI发送所述处理后的数据至 RRU， 以便于所述 RRU对所述数据 进行调制和中射频处理。
结合第六方面， 在第一种可能的实现方式中， 所述处理模块还用 于对进行信道编码处理后的下行数据进行星座映射处理，则所述发送 模块用于通过通用公共接口 CPRI发送所述处理后的数据至 RRU具体 为： 所述发送模块用于通过通用公共接口 CPRI发送所述信道编码处 理和星座映射处理后的数据至 RRU。
基于上述技术方案，本发明实施例提供的一种基带处理单元与远 端射频单元之间的数据传输方法和装置中， RRU选择接收数据中的部 分数据， 将该部分数据通过通用公共接口 CPRI发送至 BBU; 或者， BBU对数据只进行信道编码处理或只进行信道编码处理和星座映射 处理，将经处理的数据发送至 RRU，由 RRU对数据进行星座映射处理、 多天线多输入输出 MIMO编码处理和正交频分复用 OFDM符号生成 处理或者由 RRU对数据进行 MIMO编码处理和 OFDM符号生成处理， 即将增加数据冗余的步骤部分由 RRU执行。 由此使得通过 CPRI传输 的数据量大幅度减少，这样可以有效降低 BBU与 RRU之间数据的传输 速率， 节省 BBU与 RRU之间传输线的成本。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面 将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而 易见地， 下面描述中的附图仅仅是本发明的一些实施例， 对于本领域 普通技术人员来讲， 在不付出创造性劳动性的前提下， 还可以根据这 些附图获得其他的附图。
图 1示出了基站数据收发结构的示意性图。
图 2示出了本发明实施例提供的的一种基带单元 BBU与远端射频 单元 RRU之间的数据传输方法的示意性流程图。 图 3示出了本发明实施例的一种基带单元 BBU与远端射频单元 RRU之间的数据传输方法的示意性框图。
图 4示出了本发明实施例提供的一种用于数据传输的装置的示意 性框图。
图 5示出了本发明实施例提供的一种用于数据传输的装置的示意 性框图。
图 6示出了本发明实施例提供的一种用于数据传输的装置的示意 性框图。
图 7示出了本发明实施例提供的一种用于数据传输的装置的示意 性框图。
图 8示出了本发明实施例提供的一种用于数据传输的装置的示意 性框图。
图 9示出了本发明实施例提供的一种用于数据传输的装置的示意 性框图。 具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方 案进行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部 分实施例， 而不是全部的实施例。 基于本发明中的实施例， 本领域普 通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
应理解， 本发明实施例的技术方案可以应用于各种通信系统， 例 如： 长期演进（ Long Term Evolution， 简称为 "LTE" ) 系统， 同样适 用于釆用 OFDM类多载波技术的无线系统， 包括但是不限于全球微波 互联接入 ( Worldwide Interoperability for Microwave Access， 简称为 "WiMAX" ) ， 数字音频广播（Digital Audio Broadcasting ， 简称为 "DAB" )、数字视频广播（ Digital Video Broadcasting ，简称为 "DVB" )、 无线局域网 （ Wireless Local Area Networks ， 简称为 "WLAN" ) 等。
图 2示出了本发明实施例提供的的一种基带单元 BBU与远端射频 单元 RRU之间的数据传输方法的示意性流程图。 本发明实施例中， RRU将接收数据中的部分数据通过 CPRI发送至 BBU。
如图 2所示， 该方法包括：
S201、 RRU通过所述 RRU中的 N组接收天线接收数据；
具体地， 将 RRU中的接收天线分成 N组， N为大于 1的正整数。 该 N组中， 每一组接收天线可以为一个或多个， 本发明对此并不限制。
S202、 RRU选择所述接收数据中的部分数据，将该部分数据通过 通用公共接口 CPRI发送至 BBU。
由此， 相比现有技术中， RRU将接收天线接收的数据全部通过 CPRI发送至 BBU; 本发明实施例中 RRU选择接收数据中的部分数据， 通过 CPRI发送至 BBU。 使得通过 CPRI传输的数据量大幅度减少， 这 样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU 之间传输线的成本。
具体地，数据可以包括数据信号和导频信号； 数据信号由数据符 号组成， 本发明实施例中可以为数据单载波频分多址（ Single-carrier Frequency-Division Multiple Access, 简称 SC-FDMA )符号， 但本发 明对此并不限制； 导频信号由导频符号组成， 本发明实施例中可以为 导频 SC-FDMA符号， 但本发明对此并不限制。
在本发明的一个实施例中， S202具体可以包括： RRU选择该 N组 接收天线中的某一组接收天线，将该某一组接收天线接收的数据通过 CPRI发送至 BBU。 实际上， 该 N组接收天线接收的数据是数据源发送 的数据的不同形式， 所以将某一组天线接收的数据通过 CPRI传输至 BBU并不会发送数据丟失的情况。
由此， 相比现有技术中 RRU将所有接收天线接收的数据通过 CPRI传输至 BBU，本发明实施例中 RRU将该 N组接收天线中的某一组 接收天线接收的数据通过 CPRI传输至 BBU， 使得通过 CPRI传输的数 据量大幅度减少，这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。 在本发明的另一个实施例中， S202具体可以包括： RRU选择所述 N组接收天线上接收的数据中的导频信号，将所述导频信号通过 CPRI 发送至 BBU; RRU选择该 N组接收天线中的某一组接收天线， 将该某 一组接收天线接收的数据中的数据信号通过 CPRI传输至 BBU。 RRU 选择该 N组接收天线中的某一组接收天线的方式可以是随机选择的， 或者是根据某种规则选择的， 本发明对此并不限制。
数据中的导频信号的作用主要用于解调，所以 RRU将导频信号与 部分数据信号传输至 BBU， 同样可以保证数据传输的完整性。
由此，相比现有技术中， RRU将所有接收天线接收的数据中的导 频信号与数据信息都通过 CPRI传输至 BBU， 本发明实施例中 RRU将 该 N组接收天线接收的数据中的导频信号发送至 BBU， 将该 N组接收 天线上的某一组接收天线上的接收数据中的数据信号传输至 BBU。使 得通过 CPRI传输的数据量大幅度减少， 这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。 在本发明的另一实施例中， S202具体可以包括： RRU以轮询的方 式选择该 N组接收天线接收的数据中的部分数据， 将所述部分数据通 过 CPRI发送至 BBU。
其中， RRU以轮询的方式选择该 N组接收天线接收的数据中的部 分数据， 将所述部分数据通过 CPRI发送至 BBU， 具体可以是： RRU 将该 N组接收天线从 0开始依次进行编号； 将每组接收天线接收的数 据中的数据信号按照整数个数据符号进行分组， 并从 0开始依次进行 编号；将每组接收天线接收的数据中的导频信号按照一个导频符号进 行分组， 并从 0开始依次进行编号； RRU在第 n次轮询该 N组接收天 线时， 选择第 m组天线组接收的数据中的第 n组数据信号， 将第 n组数 据信号通过 CPRI发送至 BBU， 每组数据信号由整数个数据符号组成； RRU选择第 m组天线组接收的数据中的第 n组导频信号， 将所述第 n组 导频信号通过 CPRI发送至 BBU， 每组导频信号由 1个导频符号组成； m为 n除以 N的余数， 第 n次为从 0开始依次计数。
例如： 假设有 3组接收天线， 编号分别为 0、 1、 2。 RRU在第 0次 轮询该 3组接收天线时， 选择第 0 ( 0为 0除以 3的余数）组接收天线接 收的数据中的第 0组数据信号， 将第 0组接收天线接收的数据中第 0组 数据信号通过 CPRI发送至 BBU， 将第 0组接收天线中接收的数据中第 0组导频信号通过 CPRI发送至 BBU; RRU在第 1次轮询该 3组接收天线 时， 选择第 1 ( 1为 1除以 3的余数）组接收天线接收的数据中的第 1组 数据信号， 将第 1组接收天线接收的数据中第 1组数据信号通过 CPRI 发送至 BBU， 将第 1组接收天线中接收的数据中第 1组导频信号通过 CPRI发送至 BBU; RRU在第 2次轮询该 3组接收天线时， 选择第 2 ( 2 为 2除以 3的余数）组接收天线接收的数据中的第 2组数据信号， 将第 2 组接收天线接收的数据中第 2组数据信号通过 CPRI发送至 BBU， 将第 2组接收天线接收的数据中第 2组导频信号通过 CPRI发送至 BBU; RRU在第 3次轮询该 3组接收天线时， 将第 0 ( 0为 3除以 3的余数）组接 收天线接收的数据中第 3组数据信号发送至 BBU，将第 3组接收天线接 收的数据中第 3组导频信号通过 CPRI发送至 BBU; RRU在第 4次轮询 该 3组接收天线时， 将第 1 ( 1为 4除以 3的余数）组接收天线接收的数 据中第 4组数据信号发送至 BBU， 将第 1组接收天线接收的数据中第 4 组导频信号通过 CPRI发送至 BBU， 以此类推。
由此，相比现有技术中， RRU将所有接收天线接收的数据中的导 频信号与数据信号都通过 CPRI发送至 BBU， 本发明实施例中 RRU将 该 N组接收天线中每一组接收天线接收的数据中部分数据符号和部 分导频符号发送至 BBU。 使得通过 CPRI传输的数据量大幅度减少， 这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。
或者， RRU以轮询的方式选择该 N组接收天线接收的数据中的部 分数据， 将所述部分数据通过 CPRI发送至 BBU， 具体可以是： RRU 选择该 N组接收天线接收的数据中的导频信号， 将所述导频信号通过 CPRI发送至 BBU; 该 RRU将该 N组接收天线从 0开始依次进行编号； 将该 N组接收天线上接收的数据中的数据信号按照整数个数据符号 进行分组， 并从 0开始依次进行编号； 该 RRU在第 n次轮询该 N组接收 天线时， 选择第 m组天线组接收的数据中的第 n组数据信号， 将所述 第 n组数据信号通过 CPRI发送至 BBU， 每组数据信号由整数个数据符 号组成。这种方式中与上一种方式中对于接收数据中数据信号的处理 方式是一致的。
由此，相比现有技术中， RRU将所有接收天线接收的数据中的导 频信号与数据信号都通过 CPRI传输至 BBU， 本发明实施例中 RRU将 该 N组接收天线中每一组接收天线接收的数据中部分数据符号和全 部导频符号发送至 BBU。 使得通过 CPRI传输的数据量大幅度减少， 这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。
图 3示出了本发明实施例的一种基带单元 BBU与远端射频单元 RRU之间的数据传输方法的示意性框图。
如图 3所示， 该方法实施例包括：
1、 BBU对下行数据进行信道编码处理。
其中，信道编码的过程具体包括：加传输块循环冗余检验（Cyclic Redundancy Check, 简称 CRC )、码块分段、加码块 CRC、信道编码、 速率配配和码块级联、 比特加扰、 交织。 或者， BBU可以对下行数据进行信道编码处理和星座映射，其中， 星座映射的过程包括比特到星座图的映射处理； MIMO编码的过程包 括空间层的映射， 预编码或者波束赋形 （Beamforming, 简称 BF ) 。
当前， BBU对下行数据进行信道编码、 星座映射、 多天线多输入 输出 MIMO编码、 正交频分复用 OFDM符号生成。 这些数据处理方式 都是增加数据冗余的过程。本发明实施例中， BBU对下行数据指进行 信道编码或者只进行信道编码和星座映射，而其他增加数据冗余的处 理步骤将由 RRU完成， 这使得通过 CPRI传输的数据量大幅度减少， 这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。
2、 BBU将处理后的数据通过 CPRI发送至 RRU。
BBU通过 CPRI发送至 RRU的数据， 具体可以是 BBU通过 CPRI发 送经过信道编码处理后的数据至 RRU或者可以是 BBU通过 CPRI发送 经过信道编码处理和星座映射处理的数据至 RRU。
3、 RRU对该数据进行调制和中射频处理。
若该数据为所述 BBU进行信道编码处理后的数据；
RRU对该数据进行调制具体为 RRU对该数据进行星座映射、多天 线多输入输出 MIMO编码、 正交频分复用 OFDM符号生成。
RRU对该数据进行中射频处理具体为 RRU对该数据进行 IQ调制、 中频滤波、 上变频和功放处理。 或者，在基站实现下行发射时， BBU对数据进行信道编码处理和 星座映射， BBU通过 CPRI将处理后的数据通过 CPRI传输至 RRU， RRU 对该数据进行调制和中射频处理，即当该数据为 BBU进行信道编码处 理和星座映射处理后的数据时， RRU对该数据进行调制包括： RRU 对该数据进行调制具体为 RRU对该数据进行多天线多输入输出
MIMO编码、 正交频分复用 OFDM符号生成。
BBU通过内部的现场可编程逻辑门阵列 （ Field Programmable Gate Array, 简称" FPGA" )芯片对数据进行基带处理，例如信道编码、 星座映射、 MIMO编码和 OFDM符号生成处理， 而 RRU内部也包含有 FPGA芯片， 所以 RRU也可以对数据进行基带处理的操作， 例如对数 据进行星座映射、 MIMO编码和 OFDM符号生成处理。
因此， 基于本发明实施例的基带单元 BBU与远端射频单元 RRU 之间的低数据量传输方法， 由 BBU仅对数据进行信道编码处理，通过 CPRI将进行信道编码处理的数据传输至 RRU， 由 RRU进行之前由 BBU进行的调制处理，之后对数据进行中射频处理； 或者由 BBU对数 据进行信道编码处理、 星座映射处理， 通过 CPRI将进行信道编码处 理的数据传输至 RRU， 由 RRU进行之前由 BBU进行的调制处理， 之 后对数据进行中射频处理。因为之前由 BBU进行的对数据进行调制处 理是增加冗余的过程，现在这一过程中的部分步骤是在将数据传输至 RRU后进行的， 使得通过 CPRI传输的数据量大幅度减少， 这样可以 有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传 输线的成本。
图 4示出了本发明实施例提供的用于数据传输的装置的示意性框 图， 该装置可以是基带单元 BBU， 但本发明不限于此。 本发明实施例 提供的装置可以应用图 2示出的本发明实施例提供的方法。 如图 4所示， 该用于数据传输的装置包括：
接收模块 401， 用于所述装置中的 N组接收天线接收数据； 具体地， 将该装置中的接收天线分成 N组， N为大于 1的正整数。 该 N组中，每一组接收天线可以为一个或多个，本发明对此并不限制。
处理模块 402， 用于选择所述接收数据中的部分数据， 将所述部 分数据通过通用公共接口 CPRI发送至 BBU。
由此， 相比现有技术中， RRU将接收天线接收的数据全部通过 CPRI发送至 BBU; 本发明实施例中 RRU选择接收数据中的部分数据， 通过 CPRI发送至 BBU。 使得通过 CPRI传输的数据量大幅度减少， 这 样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU 之间传输线的成本。
在本发明的一个实施例中， 处理模块 402可以用于选择所述 N组 接收天线中的某一组接收天线，将所述某一组接收天线接收的数据通 过 CPRI发送至 BBU。
由此， 相比现有技术中 RRU将所有接收天线接收的数据通过 CPRI传输至 BBU，本发明实施例中 RRU将该 N组接收天线中的某一组 接收天线接收的数据通过 CPRI发送至 BBU， 使得通过 CPRI传输的数 据量大幅度减少，这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。
在本发明的另一个实施例中， 处理模块 402可以用于选择所述 N 组接收天线上接收的数据中的导频信号， 将所述导频信号通过 CPRI 发送至 BBU; 所述处理模块 402可以用于选择所述 N组接收天线中的 某一组接收天线，将所述某一组接收天线接收的数据中的数据信号通 过 CPRI发送至 BBU。 所述处理模块 402选择所述 N组接收天线中的某 一组接收天线的方式可以是随机选择的，或者是根据某种规则选择的， 本发明对此并不限制。
由此，相比现有技术中， RRU将所有接收天线接收的数据中的导 频信号与数据信息都通过 CPRI传输至 BBU， 本发明实施例中 RRU将 该 N组接收天线接收的数据中的导频信号发送至 BBU， 将该 N组接收 天线上的某一组接收天线上的接收数据中的数据信号传输至 BBU。使 得通过 CPRI传输的数据量大幅度减少， 这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。
在本发明的另一实施例中， 处理模块 402用于以轮询的方式选择 该 N组接收天线接收的数据中的部分数据，将所述部分数据通过 CPRI 发送至 BBU。
其中， 处理模块 402用于以轮询的方式择该 N组接收天线接收的 数据中的部分数据， 将所述部分数据通过 CPRI发送至 BBU， 具体可 以为： 处理模块 402用于将所述 N组接收天线从 0开始依次进行编号； 将每组接收天线接收的数据中的数据信号按照整数个数据符号进行 分组， 并从 0开始依次进行编号； 将每组接收天线接收的数据中的导 频信号按照一个导频符号进行分组， 并从 0开始依次进行编号； 处理 模块 402还用于在第 n次轮询该 N组接收天线时， 选择第 m组天线组接 收的数据中的第 n组数据信号， 将所述第 n组数据信号通过 CPRI发送 至 BBU， 选择第 m组天线组接收的数据中的第 n个导频信号， 将所述 第 n组导频信号通过 CPRI发送至 BBU; 所述 m为所述 n除以 N的余数， 所述第 n次为从 0开始计数。 具体举例可以参考图 2示出的本发明实施 例中实例。
由此，相比现有技术中， RRU将所有接收天线接收的数据中的导 频信号与数据信号都通过 CPRI传输至 BBU， 本发明实施例中 RRU将 该 N组接收天线中每一组接收天线接收的数据中部分数据符号和部 分导频符号发送至 BBU。 使得通过 CPRI传输的数据量大幅度减少， 这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。
或者， 处理模块 402用于以轮询的方式选择该 N组接收天线接收 的数据中的部分数据， 将所述部分数据通过 CPRI发送至 BBU， 具体 可以是： 处理模块 402用于选择所述 N组接收天线接收的数据中的导 频信号， 将所述导频信号通过 CPRI传输至 BBU; 处理模块 402还用于 将所述 N组接收天线从 0开始依次进行编号；将所述 N组接收天线上接 收的数据中的数据信号按照整数个数据符号进行分组， 并从 0开始依 次进行编号； 处理模块 402还用于在第 n次轮询所述 N组接收天线时， 选择第 m组天线组接收的数据中的第 n组数据信号， 将所述第 n组数据 信号通过 CPRI发送至 BBU。
由此，相比现有技术中， RRU将所有接收天线接收的数据中的导 频信号与数据信号都通过 CPRI传输至 BBU， 本发明实施例中 RRU将 该 N组接收天线中每一组接收天线接收的数据中部分数据符号和全 部导频符号发送至 BBU。 使得通过 CPRI传输的数据量大幅度减少， 这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。
图 5示出了本发明实施例提供的一种用于数据传输的装置的示意 性框图， 该装置可以是远端射频单元 RRU， 但本发明不限于此。 本发 明实施例提供的装置可以应用图 3示出的本发明实施例提供的方法。 如图 5所示， 该用于数据传输的装置包括：
接收模块 501， 用于通过通用公共接口 CPRI接收 BBU发送的下行 数据， 所述数据为所述 BBU进行信道编码处理后的数据， 或者进行信 道编码处理和星座映射处理后的数据；
处理模块 502， 用于对所述数据进行调制和中射频处理。
其中， 当所述数据为所述 BBU进行信道编码处理后的数据时， 处 理模块 502用于对所述数据进行调制包括，处理模块 502具体用于对该 数据进行调制具体为 RRU对该数据进行星座映射、多天线多输入输出 MIMO编码、 正交频分复用 OFDM符号生成。 处理模块 502用于对所 述数据进行中射频处理包括， 处理模块 502具体用于对该数据进行 IQ 调制、 中频滤波、 上变频和功放处理。
可选地， 若接收模块 501接收的数据为 BBU进行信道编码处理和 星座映射处理后的数据， 则处理模块 502用于对所述数据进行调制包 括， 处理模块 502具体用于对所述数据进行多天线多输入输出 MIMO 编码、 正交频分复用 OFDM符号生成。 因此，基于本发明实施例的用于数据传输的装置， 由于 BBU仅对 数据进行信道编码处理， 通过 CPRI将进行信道编码处理的数据传输 至 RRU， 由 RRU进行之前由 BBU进行的调制处理， 之后对数据进行 中射频处理； 或者由 BBU对数据进行信道编码处理、 星座映射处理， 通过 CPRI将进行信道编码处理的数据传输至 RRU， 由 RRU进行之前 由 BBU进行的调制处理， 之后对数据进行中射频处理。 因为之前由 BBU进行的对数据进行调制处理是增加冗余的过程，现在这一过程中 的部分步骤是在将数据传输至 RRU后进行的， 使得通过 CPRI传输的 数据量大幅度减少，这样可以有效降低 BBU与 RRU之间数据的传输速 率， 节省 BBU与 RRU之间传输线的成本。
图 6示出了本发明实施例提供的一种用于数据传输的装置的示意 性框图， 该装置可以是 BBU， 但本发明不限于此。 本发明实施例提供 的装置可以应用图 3示出的本发明实施例提供的方法。 如图 6所示， 该用于数据传输的装置包括：
处理模块 601， 用于对下行数据进行信道编码处理；
发送模块 602， 用于通过通用公共接口 CPRI发送所述处理后的数 据至 RRU， 以便于所述 RRU对所述数据进行调制和中射频处理。
可选地， 处理模块 601， 还可以用于对进行信道编码处理后的下 行数据进行星座映射处理， 则发送模块 602用于通过通用公共接口 CPRI发送所述处理后的数据至 RRU具体为： 发送模块 602用于通过通 用公共接口 CPRI发送所述信道编码处理和星座映射处理后的数据至 当前， BBU对下行数据进行信道编码、 星座映射、 多天线多输入 输出 MIMO编码、 正交频分复用 OFDM符号生成。 这些数据处理方式 都是增加数据冗余的过程。本发明实施例中， BBU对下行数据指进行 信道编码或者只进行信道编码和星座映射，而其他增加数据冗余的处 理步骤将由 RRU完成， 这使得通过 CPRI传输的数据量大幅度减少， 这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。
图 7示出了本发明实施例提供的一种用于数据传输的装置的示意 性框图， 该装置可以是基带单元 BBU， 但本发明不限于此。 本发明实 施例提供的装置可以应用图 2示出的本发明实施例提供的方法。 如图 7所示， 该用于数据传输的装置包括：
接收器 701， 用于所述装置中的 N组接收天线接收数据； 具体地， 将该装置中的接收天线分成 N组， N为大于 1的正整数。 该 N组中，每一组接收天线可以为一个或多个，本发明对此并不限制。
处理器 702， 用于选择所述接收数据中的部分数据， 将所述部分 数据通过通用公共接口 CPRI发送至 BBU。
由此， 相比现有技术中， RRU将接收天线接收的数据全部通过 CPRI发送至 BBU; 本发明实施例中 RRU选择接收数据中的部分数据， 通过 CPRI发送至 BBU。 使得通过 CPRI传输的数据量大幅度减少， 这 样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU 之间传输线的成本。
在本发明的一个实施例中， 处理器 702可以用于选择所述 N组接 收天线中的某一组接收天线，将所述某一组接收天线接收的数据通过 CPRI发送至 BBU。
由此， 相比现有技术中 RRU将所有接收天线接收的数据通过 CPRI传输至 BBU，本发明实施例中 RRU将该 N组接收天线中的某一组 接收天线接收的数据通过 CPRI传输至 BBU， 使得通过 CPRI传输的数 据量大幅度减少，这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。 在本发明的另一个实施例中， 处理器 702可以用于选择所述 N组 接收天线上接收的数据中的导频信号， 将所述导频信号通过 CPRI发 送至 BBU; 所述处理器 702可以用于选择所述 N组接收天线中的某一 组接收天线， 将所述某一组接收天线接收的数据中的数据信号通过 CPRI发送至 BBU。 所述处理器 702选择所述 N组接收天线中的某一组 接收天线的方式可以是随机选择的， 或者是根据某种规则选择的， 本 发明对此并不限制。
由此，相比现有技术中， RRU将所有接收天线接收的数据中的导 频信号与数据信息都通过 CPRI传输至 BBU， 本发明实施例中 RRU将 该 N组接收天线接收的数据中的导频信号发送至 BBU， 将该 N组接收 天线上的某一组接收天线上的接收数据中的数据信号传输至 BBU。使 得通过 CPRI传输的数据量大幅度减少， 这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。 在本发明的另一实施例中， 处理器 702用于以轮询的方式选择该 N组接收天线接收的数据中的部分数据， 将所述部分数据通过 CPRI 发送至 BBU。 其中， 处理器 702用于以轮询的方式择该 N组接收天线接收的数 据中的部分数据， 将所述部分信号通过 CPRI发送至 BBU， 具体可以 为： 处理器 702用于将所述 N组接收天线从 0开始依次进行编号； 将每 组接收天线接收的数据中的数据信号按照整数个数据符号进行分组， 并从 0开始依次进行编号； 将每组接收天线接收的数据中的导频信号 按照一个导频符号进行分组， 并从 0开始依次进行编号； 处理器 702 还用于在第 n次轮询该 N组接收天线时，选择第 m组天线组接收的数据 中的第 n组数据信号， 将所述第 n组数据信号通过 CPRI发送至 BBU， 选择第 m组天线组接收的数据中的第 n组导频信号， 将所述第 n组导频 信号通过 CPRI发送至 BBU; 所述 m为所述 n除以 N的余数， 所述第 n次 为从 0开始计数。 具体举例可以参考图 2示出的本发明实施例中实例。
由此，相比现有技术中， RRU将所有接收天线接收的数据中的导 频信号与数据信号都通过 CPRI传输至 BBU， 本发明实施例中 RRU将 该 N组接收天线中每一组接收天线接收的数据中部分数据符号和部 分导频符号发送至 BBU。 使得通过 CPRI传输的数据量大幅度减少， 这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。
或者， 处理器 702用于以轮询的方式选择该 N组接收天线接收的 数据中的部分数据， 将所述部分数据通过 CPRI发送至 BBU， 具体可 以是： 处理器 702用于选择所述 N组接收天线接收的数据中的导频信 号， 将所述导频信号通过 CPRI传输至 BBU; 处理器 702还用于将所述 N组接收天线从 0开始依次进行编号；将所述 N组接收天线上接收的数 据中的数据信号按照整数个数据符号进行分组， 并从 0开始依次进行 编号； 处理器 702还用于在第 n次轮询所述 N组接收天线时， 选择第 m 组天线组接收的数据中的第 n组数据信号，将所述第 n组数据信号通过
CPRI发送至 BBU。
由此，相比现有技术中， RRU将所有接收天线接收的数据中的导 频信号与数据信号都通过 CPRI传输至 BBU， 本发明实施例中 RRU将 该 N组接收天线中每一组接收天线接收的数据中部分数据符号和全 部导频符号发送至 BBU。 使得通过 CPRI传输的数据量大幅度减少， 这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与
RRU之间传输线的成本。
应理解，在本发明实施例中，处理器可以是中央处理单元（ Central
Processing Unit, 简称为 "CPU" )， 处理器还可以是其他通用处理器、 数字信号处理器（DSP )、 专用集成电路（ASIC )、 现成可编程门阵 列（FPGA )或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、 分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是 任何常规的处理器等。
在实现过程中，上述各步骤可以通过处理器中的硬件的集成逻辑 电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步 骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软 件模块组合执行完成。 软件模块可以位于随机存储器， 闪存、 只读存 储器， 可编程只读存储器或者电可擦写可编程存储器、 寄存器等本领 域成熟的存储介质中。 该存储介质位于存储器， 处理器读取存储器中 的信息， 结合其硬件完成上述方法的步骤。 为避免重复， 这里不再详 细描述。 图 8示出了本发明实施例提供的一种用于数据传输的装置的示意 性框图， 该装置可以是远端射频单元 RRU， 但本发明不限于此。 本发 明实施例提供的装置可以应用图 3示出的本发明实施例提供的方法。 如图 8所示， 该用于数据传输的装置包括：
接收器 801， 用于通过通用公共接口 CPRI接收 BBU发送的下行数 据， 所述数据为所述 BBU进行信道编码处理后的数据， 或者进行信道 编码处理和星座映射处理后的数据；
处理器 802， 用于对所述数据进行调制和中射频处理。
其中， 当所述数据为所述 BBU进行信道编码处理后的数据时， 处 理器 802用于对所述数据进行调制包括，处理器 802具体用于对该数据 进行调制具体为 RRU对该数据进行星座映射、 多天线多输入输出
MIMO编码、 正交频分复用 OFDM符号生成。 处理器 802用于对所述 数据进行中射频处理包括，处理器 802具体用于对该数据进行 IQ调制、 中频滤波、 上变频和功放处理。
可选地， 若接收器 801接收的数据为 BBU进行信道编码处理和星 座映射处理后的数据， 则处理器 802用于对所述数据进行调制包括， 处理器 802具体用于对所述数据进行多天线多输入输出 MIMO编码、 正交频分复用 OFDM符号生成。 因此，基于本发明实施例的用于数据传输的装置， 由于 BBU仅对 数据进行信道编码处理， 通过 CPRI将进行信道编码处理的数据传输 至 RRU， 由 RRU进行之前由 BBU进行的调制处理， 之后对数据进行 中射频处理； 或者由 BBU对数据进行信道编码处理、 星座映射处理， 通过 CPRI将进行信道编码处理的数据传输至 RRU， 由 RRU进行之前 由 BBU进行的调制处理， 之后对数据进行中射频处理。 因为之前由 BBU进行的对数据进行调制处理是增加冗余的过程，现在这一过程中 的部分步骤是在将数据传输至 RRU后进行的， 使得通过 CPRI传输的 数据量大幅度减少，这样可以有效降低 BBU与 RRU之间数据的传输速 率， 节省 BBU与 RRU之间传输线的成本。
应理解，在本发明实施例中，处理器可以是中央处理单元（ Central Processing Unit, 简称为 "CPU" )， 处理器还可以是其他通用处理器、 数字信号处理器（DSP )、 专用集成电路（ASIC )、 现成可编程门阵 列（FPGA )或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、 分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是 任何常规的处理器等。
在实现过程中，上述各步骤可以通过处理器中的硬件的集成逻辑 电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步 骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软 件模块组合执行完成。 软件模块可以位于随机存储器， 闪存、 只读存 储器， 可编程只读存储器或者电可擦写可编程存储器、 寄存器等本领 域成熟的存储介质中。 该存储介质位于存储器， 处理器读取存储器中 的信息， 结合其硬件完成上述方法的步骤。 为避免重复， 这里不再详 细描述。 图 9示出了本发明实施例提供的一种用于数据传输的装置的示意 性框图， 该装置可以是 BBU， 但本发明不限于此。 本发明实施例提供 的装置可以应用图 3示出的本发明实施例提供的方法。 如图 9所示， 该用于数据传输的装置包括： 处理器 901， 用于对下行数据进行信道编码处理； 发送器 902， 用于通过通用公共接口 CPRI发送所述处理后的数据 至 RRU， 以便于所述 RRU对所述数据进行调制和中射频处理。
可选地， 处理器 901， 还可以用于对进行信道编码处理后的下行 数据进行星座映射处理， 则所述发送模块用于通过通用公共接口 CPRI发送所述处理后的数据至 RRU具体为： 所述发送模块用于通过 通用公共接口 CPRI发送所述信道编码处理和星座映射处理后的数据 至 RRU。
当前， BBU对下行数据进行信道编码、 星座映射、 多天线多输入 输出 MIMO编码、 正交频分复用 OFDM符号生成。 这些数据处理方式 都是增加数据冗余的过程。本发明实施例中， BBU对下行数据指进行 信道编码或者只进行信道编码和星座映射，而其他增加数据冗余的处 理步骤将由 RRU完成， 这使得通过 CPRI传输的数据量大幅度减少， 这样可以有效降低 BBU与 RRU之间数据的传输速率， 节省 BBU与 RRU之间传输线的成本。
应理解，在本发明实施例中，处理器可以是中央处理单元（ Central Processing Unit, 简称为 "CPU" )， 处理器还可以是其他通用处理器、 数字信号处理器（DSP )、 专用集成电路（ASIC )、 现成可编程门阵 歹 |J ( FPGA )或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、 分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是 任何常规的处理器等。
在实现过程中，上述各步骤可以通过处理器中的硬件的集成逻辑 电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步 骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软 件模块组合执行完成。 软件模块可以位于随机存储器， 闪存、 只读存 储器， 可编程只读存储器或者电可擦写可编程存储器、 寄存器等本领 域成熟的存储介质中。 该存储介质位于存储器， 处理器读取存储器中 的信息， 结合其硬件完成上述方法的步骤。 为避免重复， 这里不再详 细描述。

Claims

权利要求
1、一种基带单元 BBU与远端射频单元 RRU之间的数据传输方法， 其特征在于， 包括：
所述 RRU通过所述 RRU中的 N组接收天线接收数据；
所述 RRU选择所述接收数据中的部分数据，将所述部分数据通过 通用公共接口 CPRI发送至 BBU。
2、根据权利要求 1中所述的方法， 所述 RRU选择所述接收数据中 的部分数据， 将所述部分数据通过通用公共接口 CPRI发送至 BBU， 包括：
所述 RRU选择所述 N组接收天线中的某一组接收天线， 将所述某 一组接收天线接收的数据通过 CPRI发送至 BBU。
3、根据权利要求 1所述的方法， 所述 RRU选择所述接收数据中的 部分数据， 将所述部分数据通过通用公共接口 CPRI发送至 BBU， 包 括：
所述 RRU选择所述 N组接收天线上接收的数据中的导频信号， 将 所述导频信号通过 CPRI发送至 BBU;所述 RRU选择所述 N组接收天线 中的某一组接收天线，将所述某一组接收天线接收的数据中的数据信 号通过 CPRI发送至 BBU。
4、根据权利要求 1所述的方法， 所述 RRU选择所述接收数据中的 部分数据， 将所述部分数据通过通用公共接口 CPRI发送至 BBU， 包 括：
所述 RRU以轮询的方式选择所述 N组接收天线接收的数据中的 部分数据， 将所述部分数据通过 CPRI发送至 BBU。
5、根据权利要求 4所述的方法， 所述 RRU以轮询的方式选择所述 N组接收天线接收的数据中的部分数据， 将所述部分数据通过 CPRI 发送至 BBU， 包括：
所述 RRU将所述 N组接收天线从 0开始依次进行编号； 将每组接 收天线接收的数据中的数据信号按照整数个数据符号进行分组，并从 0开始依次进行编号； 将每组接收天线接收的数据中的导频信号按照 一个导频符号进行分组， 并从 0开始依次进行编号；
所述 RRU在第 n次轮询该 N组接收天线时，选择第 m组天线组接收 的数据中的第 n组数据信号， 将所述第 n组数据信号通过 CPRI发送至 BBU, 选择第 m组天线组接收的数据中的第 n组导频信号， 将所述第 n 组导频信号通过 CPRI发送至 BBU;
所述 m为所述 n除以 N的余数， 所述第 n次为从 0开始计数。
6、根据权利要求 4所述的方法， 所述 RRU以轮询的方式选择所述 N组接收天线接收的数据中的部分数据， 将所述部分数据通过 CPRI 发送至 BBU， 包括：
所述 RRU选择所述 N组接收天线接收的数据中的导频信号， 将所 述导频信号通过 CPRI发送至 BBU;
所述 RRU将所述 N组接收天线从 0开始依次进行编号；将所述 N组 接收天线上接收的数据中的数据信号按照整数个数据符号进行分组， 并从 0开始依次进行编号；
所述 RRU在第 n次轮询所述 N组接收天线时，选择第 m组天线组接 收的数据中的第 n组数据信号， 将所述第 n组数据信号通过 CPRI发送 至 BBU。
7、一种基带单元 BBU与远端射频单元 RRU之间的数据传输方法， 其特征在于， 包括：
RRU通过通用公共接口 CPRI接收 BBU发送的下行数据， 所述数 据为所述 BBU进行信道编码处理后的数据，或者进行信道编码处理和 星座映射处理后的数据；
所述 RRU对所述数据进行调制和中射频处理。
8、 根据权利要求 7所述的方法， 其特征在于， 当所述数据为所述 BBU进行信道编码处理后的数据时，
所述 RRU对所述数据进行调制包括：
所述 RRU对所述数据进行星座映射处理、 多天线多输入输出
MIMO编码处理和正交频分复用 OFDM符号生成处理。
9、 根据权利要求 7所述的方法， 其特征在于， 当所述数据为所述 BBU进行信道编码处理和星座映射处理后的数据时；
所述 RRU对所述数据进行调制包括：
所述 RRU对所述数据进行 MIMO编码处理和 OFDM符号生成处 理。
10、一种基带单元 BBU与远端射频单元 RRU之间的数据传输方法， 其特征在于， 包括：
BBU对下行数据进行信道编码处理；
所述 BBU通过通用公共接口 CPRI发送所述处理后的数据至 RRU， 以便于所述 RRU对所述数据进行调制和中射频处理。
11、 根据权利要求 10所述的方法， 其特征在于， 所述 BBU对下行 数据进行信道编码处理后， 还包括：
所述 BBU对下行数据进行星座映射处理，
则所述 BBU通过通用公共接口 CPRI发送所述处理后的数据至 RRU具体为： 所述 BBU通过通用公共接口 CPRI发送所述信道编码处 理和星座映射处理后的数据至 RRU。
12、 一种用于数据传输的装置， 其特征在于， 包括：
接收模块， 用于通过所述装置中的 N组接收天线接收数据； 处理模块， 用于选择所述接收数据中的部分数据， 将所述部分数 据通过通用公共接口 CPRI发送至 BBU。
13、 根据权利要求 12所述的装置， 其特征在于， 所述处理模块用 于选择所述接收数据中的部分数据，将所述部分数据通过通用公共接 口 CPRI发送至 BBU， 包括：
所述处理模块用于选择所述 N组接收天线中的某一组接收天线， 将所述某一组接收天线接收的数据通过 CPRI发送至 BBU。
14、 根据权利要求 12所述的装置， 其特征在于， 所述处理模块用 于选择所述接收数据中的部分数据，将所述部分数据通过通用公共接 口 CPRI发送至 BBU， 包括：
所述处理模块用于选择所述 N组接收天线上接收的数据中的导 频信号， 将所述导频信号通过 CPRI发送至 BBU; 所述处理模块用于 选择所述 N组接收天线中的某一组接收天线， 将所述某一组接收天线 接收的数据中的数据信号通过 CPRI发送至 BBU。
15、 根据权利要求 12所述的装置， 其特征在于， 所述处理模块用 于选择所述接收数据中的部分数据，将所述部分数据通过通用公共接 口 CPRI发送至 BBU， 包括：
所述处理模块用于以轮询的方式选择所述 N组接收天线接收的 数据中的部分数据， 将所述部分数据通过 CPRI发送至 BBU。
16、 根据权利要求 15所述的装置， 其特征在于， 所述处理模块用 于以轮询的方式选择所述 N组接收天线接收的数据中的部分数据， 将 所述部分数据通过 CPRI发送至 BBU， 包括：
所述处理模块用于将所述 N组接收天线从 0开始依次进行编号； 将每组接收天线接收的数据中的数据信号按照整数个数据符号进行 分组， 并从 0开始依次进行编号； 将每组接收天线接收的数据中的导 频信号按照一个导频符号进行分组， 并从 0开始依次进行编号；
所述处理模块还用于在第 n次轮询该 N组接收天线时，选择第 m组 天线组接收的数据中的第 n组数据信号， 将所述第 n组数据信号通过 CPRI发送至 BBU，选择第 m组天线组接收的数据中的第 n组导频信号， 将所述第 n组导频信号通过 CPRI发送至 BBU;
所述 m为所述 n除以 N的余数， 所述第 n次为从 0开始计数。
17、 根据权利要求 15所述的装置， 其特征在于， 所述处理模块用 于以轮询的方式选择所述 N组接收天线接收的数据中的部分数据， 将 所述部分数据通过 CPRI发送至 BBU， 包括：
所述处理模块用于选择所述 N组接收天线接收的数据中的导频 信号， 将所述导频信号通过 CPRI传输至 BBU;
所述处理模块还用于将所述 N组接收天线从 0开始依次进行编号； 将所述 N组接收天线上接收的数据中的数据信号按照整数个数据符 号进行分组， 并从 0开始依次进行编号；
所述处理模块还用于在第 n次轮询所述 N组接收天线时，选择第 m 组天线组接收的数据中的第 n组数据信号，将所述第 n组数据信号通过 CPRI发送至 BBU。
18、 一种用于数据传输的装置， 其特征在于， 包括：
接收模块， 用于通过通用公共接口 CPRI接收 BBU发送的下行数 据， 所述数据为所述 BBU进行信道编码处理后的数据， 或者进行信道 编码处理和星座映射处理后的数据；
处理模块， 用于对所述数据进行调制和中射频处理。
19、 根据权利要求 18所述的装置， 其特征在于， 当所述数据为所 述 BBU进行信道编码处理后的数据时，
所述处理模块用于对所述数据进行调制， 包括：
所述处理模块用于对所述数据进行星座映射处理、多天线多输入 输出 MIMO编码处理和正交频分复用 OFDM符号生成处理。
20、 根据权利要求 18所述的装置， 其特征在于， 当所述数据为所 述 BBU进行信道编码处理和星座映射处理后的数据时；
所述处理模块用于对所述数据进行调制包括：
所述处理模块用于对所述数据进行 MIMO编码处理和 OFDM符 号生成处理。
21、 一种用于数据传输的装置， 其特征在于， 包括：
处理模块， 用于对下行数据进行信道编码处理；
发送模块， 用于通过通用公共接口 CPRI发送所述处理后的数据 至 RRU， 以便于所述 RRU对所述数据进行调制和中射频处理。
22、 根据权利要求 20所述的装置， 其特征在于， 包括： 所述处理模块还用于对进行信道编码处理后的下行数据进行星 座映射处理，
则所述发送模块用于通过通用公共接口 CPRI发送所述处理后的 数据至 RRU具体为： 所述发送模块用于通过通用公共接口 CPRI发送 所述信道编码处理和星座映射处理后的数据至 RRU。
PCT/CN2014/077210 2014-05-12 2014-05-12 一种基带单元bbu与远端射频单元rru之间的数据传输方法和装置 WO2015172277A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/CN2014/077210 WO2015172277A1 (zh) 2014-05-12 2014-05-12 一种基带单元bbu与远端射频单元rru之间的数据传输方法和装置
EP14891906.1A EP3136669A4 (en) 2014-05-12 2014-05-12 Method and device for transmitting data between base band unit (bbu) and remote radio unit (rru)
CN201480078837.6A CN106464626B (zh) 2014-05-12 2014-05-12 一种基带单元bbu与远端射频单元rru之间的数据传输方法和装置
US15/349,612 US20170063586A1 (en) 2014-05-12 2016-11-11 Method for transmitting data between baseband unit bbu and remote radio unit rru, and data transmission apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/077210 WO2015172277A1 (zh) 2014-05-12 2014-05-12 一种基带单元bbu与远端射频单元rru之间的数据传输方法和装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/349,612 Continuation US20170063586A1 (en) 2014-05-12 2016-11-11 Method for transmitting data between baseband unit bbu and remote radio unit rru, and data transmission apparatus

Publications (1)

Publication Number Publication Date
WO2015172277A1 true WO2015172277A1 (zh) 2015-11-19

Family

ID=54479107

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/077210 WO2015172277A1 (zh) 2014-05-12 2014-05-12 一种基带单元bbu与远端射频单元rru之间的数据传输方法和装置

Country Status (4)

Country Link
US (1) US20170063586A1 (zh)
EP (1) EP3136669A4 (zh)
CN (1) CN106464626B (zh)
WO (1) WO2015172277A1 (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3247052A1 (en) * 2016-05-19 2017-11-22 Hon Hai Precision Industry Co., Ltd. Method and apparatus for data reduction in a communication system between remote radio heads and baseband units
CN107615877A (zh) * 2015-12-21 2018-01-19 华为技术有限公司 传输数据的方法、射频拉远单元rru和基带单元bbu
WO2018065983A1 (en) * 2016-10-07 2018-04-12 Corning Optical Communications Wireless Ltd Digital wireless distributed communications system (wdcs) employing a centralized spectrum chunk construction of communications channels for distribution to remote units to reduce transmission data rates
CN109644026A (zh) * 2016-09-06 2019-04-16 瑞典爱立信有限公司 用于确定波束成形信息的方法和装置
CN109792637A (zh) * 2016-08-05 2019-05-21 诺基亚技术有限公司 通过切分前传接口的用户平面数据的传输
US11063795B2 (en) 2016-11-16 2021-07-13 Telefonaktiebolaget Lm Ericsson (Publ) Methods and devices for adapting load on a fronthaul network
TWI813818B (zh) * 2018-11-27 2023-09-01 美商艾斯康實驗室公司 非同調合作多輸入多輸出通信

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11172379B2 (en) * 2016-01-04 2021-11-09 Marvell Asia Pte, Ltd. Methods and apparatus for configuring a front end to process multiple sectors with multiple radio frequency frames
CN107948948B (zh) * 2017-11-07 2020-12-22 北京全路通信信号研究设计院集团有限公司 一种lte-r分布式网络系统
WO2019241919A1 (zh) * 2018-06-20 2019-12-26 华为技术有限公司 一种符号处理方法及相关设备
TWI743548B (zh) 2018-08-31 2021-10-21 財團法人工業技術研究院 用於使用者設備和遠程接入節點的連接重定向方法以及使用所述方法的使用者設備
CN112188482B (zh) * 2019-07-04 2024-05-10 中兴通讯股份有限公司 标识id配置方法及装置、标识id获取方法及装置
CN114095172A (zh) * 2020-07-02 2022-02-25 中国移动通信集团设计院有限公司 无线接口前传数据校验方法及装置
CN113473648A (zh) * 2021-06-29 2021-10-01 南京濠暻通讯科技有限公司 5g基站ru中rmii与10g接口间数据传输方法
CN114466086A (zh) * 2021-12-31 2022-05-10 华为技术有限公司 一种数据传输方法、通信装置及通信系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101321011A (zh) * 2008-06-30 2008-12-10 华为技术有限公司 拉远射频单元的互连方法和系统
CN102843720A (zh) * 2011-06-24 2012-12-26 中兴通讯股份有限公司 分布式基站系统中数据的压缩、解压缩方法、装置及系统
CN103518356A (zh) * 2013-03-07 2014-01-15 华为技术有限公司 数据压缩方法、还原方法，装置及系统
CN103546412A (zh) * 2012-07-11 2014-01-29 华为技术有限公司 一种数据传输方法和系统

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100434054B1 (ko) * 2002-04-26 2004-06-04 엘지전자 주식회사 래디오 링크 콘트롤의 폴링방법
US7944985B2 (en) * 2006-08-24 2011-05-17 Interdigital Technology Corporation MIMO transmitter and receiver for supporting downlink communication of single channel codewords
US8259834B2 (en) * 2006-09-29 2012-09-04 Broadcom Corporation Method and system for OFDM based MIMO system with enhanced diversity
US7877071B2 (en) * 2007-08-01 2011-01-25 Broadcom Corporation Unified STTD/CLTD dedicated pilot processing
CN102377477B (zh) * 2010-08-27 2015-01-21 华为技术有限公司 基带信号传输方法和装置
CN102546080B (zh) * 2010-12-21 2014-06-25 华为技术有限公司 一种下行基带信号生成方法及相关设备、系统
US8989088B2 (en) * 2011-01-07 2015-03-24 Integrated Device Technology Inc. OFDM signal processing in a base transceiver system
US20120294244A1 (en) * 2011-05-17 2012-11-22 Telefonaktiebolaget L M Ericsson (Publ) Distributed base station with robust packet interface
EP2761972A4 (en) * 2011-10-01 2015-08-12 Intel Corp REMOTE RADIO UNIT (RRU) AND BASEBAND UNIT (BBU)
US9369149B1 (en) * 2012-05-03 2016-06-14 Integrated Device Technology, Inc. Method and apparatus for efficient baseband unit processing in a communication system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101321011A (zh) * 2008-06-30 2008-12-10 华为技术有限公司 拉远射频单元的互连方法和系统
CN102843720A (zh) * 2011-06-24 2012-12-26 中兴通讯股份有限公司 分布式基站系统中数据的压缩、解压缩方法、装置及系统
CN103546412A (zh) * 2012-07-11 2014-01-29 华为技术有限公司 一种数据传输方法和系统
CN103518356A (zh) * 2013-03-07 2014-01-15 华为技术有限公司 数据压缩方法、还原方法，装置及系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3136669A4 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107615877A (zh) * 2015-12-21 2018-01-19 华为技术有限公司 传输数据的方法、射频拉远单元rru和基带单元bbu
EP3310123A4 (en) * 2015-12-21 2018-06-13 Huawei Technologies Co., Ltd. Data transmission method, remote radio unit (rru) and baseband unit (bbu)
EP3247052A1 (en) * 2016-05-19 2017-11-22 Hon Hai Precision Industry Co., Ltd. Method and apparatus for data reduction in a communication system between remote radio heads and baseband units
CN109792637A (zh) * 2016-08-05 2019-05-21 诺基亚技术有限公司 通过切分前传接口的用户平面数据的传输
CN109792637B (zh) * 2016-08-05 2023-08-04 诺基亚技术有限公司 通过切分前传接口的用户平面数据的传输
CN109644026A (zh) * 2016-09-06 2019-04-16 瑞典爱立信有限公司 用于确定波束成形信息的方法和装置
US11128322B2 (en) 2016-09-06 2021-09-21 Telefonaktiebolaget Lm Ericsson (Publ) Methods and devices for determination of beamforming information
CN109644026B (zh) * 2016-09-06 2022-03-08 瑞典爱立信有限公司 用于确定波束成形信息的方法和装置
WO2018065983A1 (en) * 2016-10-07 2018-04-12 Corning Optical Communications Wireless Ltd Digital wireless distributed communications system (wdcs) employing a centralized spectrum chunk construction of communications channels for distribution to remote units to reduce transmission data rates
US10819477B2 (en) 2016-10-07 2020-10-27 Corning Optical Communications LLC Digital wireless distributed communications system (WDCS) employing a centralized spectrum chunk construction of communications channels for distribution to remote units to reduce transmission data rates
US11063795B2 (en) 2016-11-16 2021-07-13 Telefonaktiebolaget Lm Ericsson (Publ) Methods and devices for adapting load on a fronthaul network
TWI813818B (zh) * 2018-11-27 2023-09-01 美商艾斯康實驗室公司 非同調合作多輸入多輸出通信

Also Published As

Publication number Publication date
CN106464626A (zh) 2017-02-22
EP3136669A1 (en) 2017-03-01
CN106464626B (zh) 2020-01-21
US20170063586A1 (en) 2017-03-02
EP3136669A4 (en) 2017-07-12

Similar Documents

Publication Publication Date Title
WO2015172277A1 (zh) 一种基带单元bbu与远端射频单元rru之间的数据传输方法和装置
CN110089083B (zh) 用于离散傅里叶变换-扩频-正交频分复用的峰值平均功率比抑制的系统和方法
CN103986682B (zh) 一种无线mimo通信系统的通信方法
WO2014008775A1 (zh) 一种数据传输方法和系统
US11438090B2 (en) Apparatus, system and method of communicating a physical layer protocol data unit (PPDU)
JPWO2015162886A1 (ja) 送信装置
CN108811187B (zh) 多卡多通移动终端
CN107517503B (zh) 一种处理装置、bbu、rru及天线校正方法
WO2016090587A1 (zh) 数据处理的方法、装置和设备
WO2016078082A1 (zh) 传输信息的方法、装置和设备
AU2020416372B2 (en) Physical channel transmission method, apparatus, and node, and storage medium
JP2017011685A (ja) 送信方法、受信方法、送信装置、及び受信装置
CN107371383B (zh) 用于使用频谱掩模填充来降低无线通信系统中的峰均功率的方法和设备
US20200266944A1 (en) Wireless communication method and user equipment for resource element mapping with frequency hopping
WO2016082123A1 (zh) 处理数据的方法、网络节点和终端
US20190044658A1 (en) Apparatus, system and method of communicating a physical layer protocol data unit (ppdu)
WO2022067749A1 (zh) 一种分集通信的方法及装置
WO2017133407A1 (zh) 信号传输方法和装置
US20150341134A1 (en) Signal processing apparatus and method
JP6552051B2 (ja) 無線通信システム
US20200187205A1 (en) User equipment and resource element mapping method
JP6835092B2 (ja) 基地局及び通信制御方法
US9124478B2 (en) Method for cancelling inter-subcarrier interference and apparatus for the same
US20230396293A1 (en) Method and apparatus for transmitting data in wireless communication system
US20220368452A1 (en) Apparatus and method for reusing resources in extended bandwidth

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14891906

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2014891906

Country of ref document: EP