CN108886714A - A kind of data communications method and equipment - Google Patents

A kind of data communications method and equipment Download PDF

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Publication number
CN108886714A
CN108886714A CN201680084050.XA CN201680084050A CN108886714A CN 108886714 A CN108886714 A CN 108886714A CN 201680084050 A CN201680084050 A CN 201680084050A CN 108886714 A CN108886714 A CN 108886714A
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data
rru
bbu
downlink
unit
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张健
李元杰
任海豹
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]

Abstract

The embodiment of the invention discloses a kind of data communications method and equipment, including：Baseband processing unit BBU and the first radio frequency remote unit RRU realize that upstream data receives, wherein the BBU includes the first physical layer function unit for the upstream data of the first RRU described in Combined Treatment；The BBU and the 2nd RRU realizes that downlink data is sent, wherein the 2nd RRU includes the second physical layer function unit of the Base-Band Processing for downlink data.Implement the embodiment of the present invention, advantageously reduces the transmission bandwidth requirement between BBU and the first RRU, meanwhile, the interference between different RRU is advantageously reduced, system spectral efficiency is improved, improves system capacity gain.

Description

A kind of data communications method and equipment Technical field
The present embodiments relate to wireless communication technology field more particularly to a kind of data communications method and equipment.
Background technique
Coordinated multipoint transmission (CoMP, Coordinated Multiple Points Transmission/Reception) technology refers to the cooperation transmission by multiple minizones, effectively solve cell edge interference problem, to improve cell edge and throughput of system, expand high-speed transfer covering.CoMP transmission can be based on cloud wireless access network (C-RAN, Cloud radio access network) framework realizes, i.e. by the baseband processing unit (BBU of multiple base stations, base band unit) it puts together and supports extensive Combined Treatment with lifting system capacity, system cost is reduced using resource statistics multiplexing simultaneously, extensive Combined Treatment is needed each remote radio unit (RRU) (RRU, remote radio unit) data pass back to BBU resource pool at a distance, with interface inter-links such as common public radio interface CPRIs between BBU and RRU.
All digital signal processing units in existing C-RAN framework centralization base station, including the processing of physical layer Base-Band Processing, upper-layer protocol, master control and clock etc. connect distributed RRU by CPRI interface, and RRU is merely responsible for the radio-frequency receiving-transmitting function after digital-analog conversion.
Since the data transmission rate in above-mentioned C-RAN framework on CPRI interface linearly increases with antenna number and system bandwidth, if long term evolution LTE system bandwidth is 20MHz, using 8 antennas, transmits flow and reach 10Gbps, this makes the transmission bandwidth between BBU and RRU more demanding.
Summary of the invention
The embodiment of the present invention provides a kind of data communications method and equipment, while to reduce the transmission bandwidth requirement between BBU and the first RRU, reduces the interference between different RRU, improves system spectral efficiency, improves system capacity gain.
In a first aspect, the embodiment of the present invention provides a kind of data communications method, comprising:
Baseband processing unit BBU and the first radio frequency remote unit RRU realize that upstream data receives, wherein The BBU includes the first physical layer function unit for the upstream data of the first RRU described in Combined Treatment；
Wherein, uplink business data described in the first physical layer function cell processing is upstream baseband data, comprising the following steps: inverse fast Fourier transform IFFT and removal cyclic prefix CP in, resource inverse mapping, multiple antennas inverse mapping and quadrature amplitude demodulation, decoding FEC.
The BBU and the 2nd RRU realizes that downlink data is sent, wherein the 2nd RRU includes the second physical layer function unit of the Base-Band Processing for downlink data.
It can be seen that, BBU and the 2nd RRU is during realizing that downlink data is sent, the downgoing baseband data of the high-transmission flow generated without transmission by physical layer function cell processing downlink data between BBU and the 2nd RRU, advantageously reduce the transmission bandwidth requirement between BBU and the 2nd RRU, simultaneously, BBU and the first RRU is during row data are received in realization, the uplink business data that BBU can be received and the first RRU of Combined Treatment is sent, advantageously reduce the interference between different RRU, system spectral efficiency is improved, system capacity gain is improved.
In conjunction with second aspect, in some possible implementations, the BBU further includes the functional unit of media access control MAC layer or more, and the 2nd RRU further includes radio frequency processing functional unit, the functional unit of described MAC layer or more for realizing non-physical layer protocol function.Wherein, the functional unit more than MAC layer is long term evolution (Long Term Evolution,) or senior long term evolution (LTE-A LTE, Long Term Evaluation Advanced) system protocol stack architecture in the more than MAC layer corresponding functional unit of protocol layer, including radio resource control rrc layer functional unit, packet data convergence PDCP layer function unit, wireless spread-spectrum technology rlc layer functional unit.
In conjunction with second aspect, in some possible implementations, the BBU further includes the functional unit of MAC layer Non real-time processing or more, and the 2nd RRU further includes the real-time processing function unit of MAC layer and radio frequency processing functional unit.
In conjunction with second aspect, in some possible implementations, the first physical layer function unit of the BBU is also used to realize the first Base-Band Processing of the downlink data；It is corresponding, the second physical layer function unit of the 2nd RRU for realizing the downlink data the second Base-Band Processing；
The Base-Band Processing of the downlink data includes first Base-Band Processing and second Base-Band Processing.
Meanwhile the BBU further includes the functional unit of media access control MAC layer or more, it is described 2nd RRU further includes radio frequency processing functional unit, the functional unit of described MAC layer or more for realizing non-physical layer protocol function.
In conjunction with second aspect, in some possible implementations, the BBU and the 2nd RRU realize that downlink data is sent, comprising:
The BBU carries out descending scheduling decision according to the downlink service data of channel state information CSI and user equipment (UE), generates down dispatch information；
The BBU sends the down dispatch information and the downlink service data to the 2nd RRU, and it is downgoing baseband signal that the down dispatch information, which is used to indicate the 2nd RRU and handles the downlink service data, and sends the downgoing baseband data to UE
In conjunction with second aspect, in some possible implementations, the BBU and the 2nd RRU realize that downlink data is sent, comprising:
The BBU carries out descending scheduling decision according to the downlink service data of CSI and UE, to generate down dispatch information；
The BBU sends the down dispatch information and the downlink service data to the 2nd RRU, the down dispatch information is used to indicate the determining downlink resource in each Transmission Time Interval TTI of the 2nd RRU and distributes information, and the downlink service data according to downlink resource distribution information processing is downgoing baseband data, and sends the downgoing baseband data to UE.
In conjunction with second aspect, in some possible implementations, the BBU carries out descending scheduling decision according to the downlink service data of CSI and UE, generates down dispatch information, and handles the down dispatch information and the downlink service data as the first downgoing baseband data；
The BBU sends the first downgoing baseband data to the 2nd RRU, and is the second downgoing baseband data by the first downgoing baseband data described in the second physical layer function cell processing, and send the second downgoing baseband data to UE.
In conjunction with second aspect, in some possible implementations, the BBU and the first RRU realize that upstream data receives, comprising:
The BBU receives the uplink business data that the first RRU is sent, and handling the uplink business data is upstream baseband data.
Second aspect, the embodiment of the present invention provide a kind of BBU, and described device includes functional unit, and the functional unit is for some or all of executing described in first aspect either method of the embodiment of the present invention step.
The third aspect, the embodiment of the present invention provide a kind of BBU, comprising: memory, processor, communication interface and communication bus；
The memory, the processor connect by the communication bus with the communication interface and complete mutual communication, and the communication interface is for wirelessly communicating；
The processor calls the executable program code stored in the memory, step some or all of described in execution first aspect of embodiment of the present invention either method.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, the accompanying drawings required for describing the embodiments of the present invention are briefly described below, apparently, drawings in the following description are some embodiments of the invention, for precision techniques personnel low for this field, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of system architecture diagram of cloud wireless access network for realizing data communications method provided in an embodiment of the present invention provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the BBU of communication means for supporting data of the embodiment of the present invention provided in an embodiment of the present invention a kind of；
Fig. 2 .1 is the hierarchical diagram of the internal agreement layer function unit of the first BBU and the 2nd RRU provided in an embodiment of the present invention；
Fig. 2 .2 is the protocol stack composed structure schematic diagram in a kind of LTE system provided in an embodiment of the present invention；
Fig. 2 .3 is the hierarchical diagram of the internal agreement layer function unit of second of BBU and the 2nd RRU provided in an embodiment of the present invention；
Fig. 2 .4 is the hierarchical diagram of the internal agreement layer function unit of the third BBU and the 2nd RRU provided in an embodiment of the present invention；
Fig. 3 is a kind of flow diagram of data communications method provided in an embodiment of the present invention；
Fig. 4 is the functional unit composition block diagram of BBU provided in an embodiment of the present invention a kind of.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
The technical solution of the embodiment of the present invention for ease of understanding, first introduce coordinated multipoint transmission CoMP scheme specified in existing wireless communications consensus standard, CoMP technology is the cooperation transmission using multiple minizones, solve cell edge interference problem, to improve cell edge and throughput of system, expand high-speed transfer covering.Since each cell base station works independently, base station can not obtain Combined Treatment gain, so proposing to use cloud wireless access network (C-RAN, Cloud radio acess network) framework realizes CoMP scheme, in cloud wireless access network system framework, by baseband processing unit (the Based Band Unit of multiple base stations, BBU it) puts together and supports extensive Combined Treatment, so that CoMP transmission obtains system capacity gain, while reduction system cost is multiplexed by resource statistics.Extensive Combined Treatment is needed each Remote Radio Unit (Remote Radio Unit, RRU data) pass back to BBU resource pool at a distance, with common public radio interface (Common Public Radio Interface between BBU and RRU, CPRI it) interconnects, but the data transmission rate on CPRI interface linearly increases with antenna number and system bandwidth, higher transmission bandwidth demand brings very big challenge to the transmission network of existing access layer, and it is difficult to there is deployment to fiber resource operator not abundant.
In view of the above-mentioned problems, the present invention proposes a kind of data communications method and equipment.Please refer to Fig. 1, Fig. 1 is a kind of system architecture diagram of cloud wireless access network for realizing data communications method provided in an embodiment of the present invention, including BBU, RRU1, RRU2 and user equipment (UE), wherein, there are interfaces between BBU and RRU1, RRU2, interface can use the carriers carrying such as optical fiber, wireless, and without limiting, RRU1 and RRU2 and UE realize data interaction through wireless communication.
It should be noted that, BBU and RRU described in the embodiment of the present invention are not limited only to BBU and RRU in C-RAN framework, BBU is also possible to wireless access network service architecture (RANaaS, radio access network as a service) in centralized processing network element etc., it is also possible to the long term evolution base station (LTE, Long Term Evaluation) or other wireless access technologys such as millimeter wave, Universal Mobile Telecommunications System (UMTS, Universal Mobile Telecommunications System) etc. technologies base station, in the case of Universal Mobile Communication System UMTS, BBU can also be the evolved base station that radio access network controller (RNC, radio network controller) and node B (Node B) are combined；RRU is also possible to distributed treatment network element in RANaaS framework etc., and RRU can also be base station or the evolved base station of the technologies such as LTE base station or other wireless access technologys such as millimeter wave, UMTS；BBU can provide wireless coverage or not provide wireless coverage, such as BBU can not have radio frequency (RF, radio frequency) system, and RRU provides wireless coverage under normal circumstances.When BBU provides wireless coverage, wireless frequency spectrum used in BBU and RRU can be identical frequency band (band) or same frequency (frequency), be also possible to different frequency bands or different frequency；Identical frequency band (band) or same frequency (frequency) can be used between RRU, be also possible to different frequency bands or different frequency；BBU and RRU may be respectively referred to as central processing unit CU (central unit) and wireless access point (RAP, radio access point), master base station (MeNB, Master eNB) and prothetic group station (SeNB, secondary eNB) etc. titles, for ease of description, the present invention continues to use the title of prior art BBU and RRU, but extensive and evolution has been carried out in its meaning.
Further, referring to Fig. 2, Fig. 2 is the structural schematic diagram of BBU for supporting data communications method of the embodiment of the present invention disclosed by the embodiments of the present invention a kind of.The BBU includes at least one processor 101, communication bus 102, memory 103 and at least one communication interface 104.Wherein, processor 101 can be a central processor CPU or microprocessor or application-specific integrated circuit (application-specific integrated circuit, ASIC), or it is one or more for controlling the integrated circuit of the technical program execution.Communication bus 102 may include an access, and information is transmitted between said modules.Memory 103 can be read-only memory (read-only memory, ROM), or the other kinds of static storage device of static information and instruction can be stored, or random access memory (random access memory, RAM), or the other kinds of dynamic memory of information and instruction can be stored, it is also possible to Electrically Erasable Programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), CD-ROM (Compact Disc Read-Only Memory, ) or other optical disc storages CD-ROM, optical disc storage (including compression optical disc, Laser disc, optical disc, Digital Versatile Disc, Blu-ray Disc etc.), magnetic disk storage medium or other magnetic storage apparatus or can be used in carrying or storing the desired program code with instruction or data structure form and can be situated between by any other of computer access Matter, but not limited to this.Communication interface 104 can be used for receiving and sending messages or with RRU interactive process, signal is sended and received, and particularly, after the upstream data of RRU is received, handle to processor 101；In addition, the data for designing downlink are sent to RRU.In general, communication interface 104 may include but be not limited to CPRI interface, antenna, at least one amplifier, transceiver, coupler, LNA (Low Noise Amplifier, low-noise amplifier), duplexer etc..In addition, communication interface 104 can also be communicated with network and other equipment by wireless communication.Any communication standard or agreement can be used in the wireless communication, including but not limited to GSM (Global System of Mobile communication, global system for mobile communications), GPRS (General Packet Radio Service, general packet radio service), CDMA (Code Division Multiple Access, CDMA), WCDMA (Wideband Code Division Multiple Access, wideband code division multiple access), LTE (Long Term Evolution, long term evolution), Email, SMS (S Hort Messaging Service, short message service) etc..Further, the mobile terminal can also include output equipment 105 and input equipment 106.Output equipment 105 and processor 101 communicate, and can show information in many ways, and input equipment 106 and processor 101 communicate, and can receive the input of user in many ways.
Executable program code is prestored in the memory 103, the memory 103 is also further stored with kernel module, and the kernel module includes operating system (such as WINDOWSTM, ANDROIDTM, IOSTMDeng).Processor 101 in above-mentioned mobile terminal can couple at least one processor 103, and the executable program code at least one described processor 103 can be called to execute call processing method shown in Fig. 3 disclosed by the embodiments of the present invention.Call processing method provided in an embodiment of the present invention is discussed in detail below.
The processor 101 of S201, the BBU realize that upstream data receives by the communication interface 104 and the first radio frequency remote unit RRU, wherein the BBU includes the first physical layer function unit for the upstream data of the first RRU described in Combined Treatment；
In the specific implementation, the processor 101 realizes the received implementation of upstream data by the communication interface 104 and the first radio frequency remote unit RRU are as follows:
The uplink business data that the first RRU is sent is received by the communication interface 104, is upstream baseband data by uplink business data described in the first physical layer function cell processing.
Wherein, uplink business data described in the first physical layer function cell processing is upstream baseband data, The following steps are included: inverse fast Fourier transform IFFT and removal cyclic prefix CP in, resource inverse mapping, multiple antennas inverse mapping and quadrature amplitude demodulation, decoding FEC.
The processor 101 of S202, the BBU realize that downlink data is sent by the communication interface 104 and the 2nd RRU, wherein the 2nd RRU includes the second physical layer function unit of the Base-Band Processing for downlink data.First RRU and the 2nd RRU may be the same or different, without limitation.
It is understood that when above-mentioned BBU and the 2nd RRU realize that downlink data is sent, the internal agreement layer function unit layered mode of BBU and the 2nd RRU can be diversified, and the embodiment of the present invention does not do unique restriction.
In one embodiment, please refer to the hierarchical diagram of the internal agreement layer function unit of the first BBU and the 2nd RRU shown in Fig. 2 .1, as shown in the figure, PHY-UL in the BBU is the first physical layer function unit, PHY-DL in the RRU1 and RRU2 is the second physical layer function unit, the BBU further includes the functional unit of media access control MAC layer or more, 2nd RRU further includes radio frequency processing functional unit, the functional unit of described MAC layer or more for realizing non-physical layer protocol function.Wherein, the functional unit more than MAC layer is long term evolution (Long Term Evolution,) or senior long term evolution (LTE-A LTE, Long Term Evaluation Advanced) system protocol stack architecture in the more than MAC layer corresponding functional unit of protocol layer, protocol stack composed structure schematic diagram in the LTE system as shown in Fig. 2 .2, including radio resource control rrc layer functional unit, packet data convergence PDCP layer function unit, wireless spread-spectrum technology rlc layer functional unit.
In the specific implementation, the processor 101 of the BBU realizes the implementation that downlink data is sent by the communication interface 104 and the 2nd RRU are as follows:
The processor 101 of the BBU carries out descending scheduling decision according to the downlink service data of channel state information CSI and user equipment (UE) by the MAC layer functional unit, generates down dispatch information；Wherein, interface I-1 (1) shown in Fig. 2 .1 indicates the interface between the MAC layer functional unit of BBU and the second physical layer function unit of the 2nd RRU, interface I-1 (2) shown in Fig. 2 .1 indicates the interface between the first physical layer function unit and the radio frequency processing functional unit of the 2nd RRU of BBU, interface I-1 (1) and interface I-1 (2) belong to the same interface I-1, send just for downlink data and upstream data receive process have different interacting messages respectively.
Wherein, the CSI includes channel quality indicator (CQI), pre-coding matrix instruction PMI, order instruction RI, the downlink service data includes the business information that core network gateway user face sends over, and the down dispatch information includes downlink resource distribution information, modulation demodulation system MCS, transmission mode, antenna port distribution information, HARQ control information etc.；
The processor 101 of the BBU sends the down dispatch information and the downlink service data to the 2nd RRU by the communication interface 104, it is downgoing baseband signal that the down dispatch information, which is used to indicate the 2nd RRU by downlink service data described in the second physical layer function cell processing, and sends the downgoing baseband data to UE by the radio frequency processing functional unit.
Wherein, 2nd RRU is downgoing baseband signal by the second physical layer function cell processing downlink service data, specifically includes the following steps: forward error correction coding, multiple antenna map and quadrature amplitude modulation, resource impact, inverse fast Fourier transform IFFT and insertion cyclic prefix Cpin.
In another embodiment, please refer to the hierarchical diagram of the internal agreement layer function unit of second of BBU and the 2nd RRU shown in Fig. 2 .3, as shown in the figure, PHY-UL in the BBU is the first physical layer function unit, PHY-DL in the RRU1 and RRU2 is the second physical layer function unit, the BBU further includes the functional unit (Upper MAC is the MAC layer Non real-time processing functional unit in Fig. 2 .3) of MAC layer Non real-time processing or more, 2nd RRU further includes that (lower MAC is the real-time processing function unit of the MAC layer in Fig. 2 .3 for the real-time processing function unit of MAC layer and radio frequency processing functional unit, RF is radio frequency processing functional unit).
In the specific implementation, the processor 101 of the BBU realizes the implementation that downlink data is sent by the communication interface 104 and the 2nd RRU are as follows:
The processor 101 of the BBU carries out descending scheduling decision according to the downlink service data of CSI and UE by the MAC layer Non real-time processing functional unit, to generate down dispatch information；Wherein, interface I-2 (1) shown in Fig. 2 .3 indicates the interface between the MAC layer Non real-time processing functional unit of BBU and the real-time processing function unit of MAC layer of the 2nd RRU, interface I-2 (2) indicates the interface between the first physical layer function unit of BBU and the real-time processing function unit of MAC layer of the 2nd RRU, interface I-2 (3) indicates the interface between the first physical layer function unit and the radio frequency processing functional unit of the 2nd RRU of BBU, interface I-2 (1), interface I-2 (2) and interface I-2 (3) belong to the same interface I-2, there is different interacting messages respectively just for the transmitting-receiving process of different data.
The processor 101 of the BBU sends the down dispatch information and the downlink service data to the 2nd RRU by the communication interface 104, the down dispatch information is used to indicate the 2nd RRU and distributes information by the determining downlink resource in each Transmission Time Interval TTI of the real-time processing function unit of the MAC layer, and the downlink service data according to downlink resource distribution information processing is downgoing baseband data, and sends the downgoing baseband data to UE by the radio frequency processing functional unit.
In another embodiment, please refer to the hierarchical diagram of the internal agreement layer function unit of the third BBU and the 2nd RRU shown in Fig. 2 .4, as shown in the figure, PHY-1 in the BBU is the first physical layer function unit, PHY-2 in the RRU1 and RRU2 is the second physical layer function unit, and the first physical layer function unit of the BBU is also used to realize the first Base-Band Processing of the downlink data；It is corresponding, the second physical layer function unit of the 2nd RRU for realizing the downlink data the second Base-Band Processing；
The Base-Band Processing of the downlink data includes first Base-Band Processing and second Base-Band Processing.
Simultaneously, the BBU further includes the functional unit (MAC in Fig. 2 .4 is the MAC layer functional unit) of media access control MAC layer or more, and the 2nd RRU further includes radio frequency processing functional unit (RF in Fig. 2 .4 is the radio frequency processing functional unit).
In the specific implementation, the processor 101 of the BBU realizes the implementation that downlink data is sent by the communication interface 104 and the 2nd RRU are as follows:
The processor 101 of the BBU carries out descending scheduling decision according to the downlink service data of CSI and UE by the MAC layer functional unit, down dispatch information is generated, and by down dispatch information described in the first physical layer function cell processing and the downlink service data is the first downgoing baseband data；
The processor 101 of the BBU sends the first downgoing baseband data to the 2nd RRU by the communication interface 104, it and by the first downgoing baseband data described in the second physical layer function cell processing is the second downgoing baseband data, and by the radio frequency processing functional unit to UE transmission the second downgoing baseband data.
It can be seen that, data communications method provided in an embodiment of the present invention, BBU and the 2nd RRU is during realizing that downlink data is sent, the downgoing baseband data of the high-transmission flow generated without transmission by physical layer function cell processing downlink data between BBU and the 2nd RRU, advantageously reduce the transmission bandwidth requirement between BBU and the 2nd RRU, meanwhile BBU and the first RRU are during row data are received in realization The uplink business data that BBU can be received and the first RRU of Combined Treatment is sent advantageously reduces the interference between different RRU, improves system spectral efficiency, improves system capacity gain.
Optionally, in the embodiment of the present invention, before the processor 101 of the BBU carries out descending scheduling decision according to the downlink service data of CSI and UE by the MAC layer functional unit, the processor 101 is also used to:
The original CSI that the 2nd RRU is sent is received by the communication interface 104, the original CSI is the RRU after the original CSI for receiving UE transmission, Xiang Suoshu BBU forwarding；
It is the CSI by original CSI described in the first physical layer function unit Base-Band Processing.
Optionally, in the embodiment of the present invention, in the functional unit that the BBU further includes media access control MAC layer or more, in the case that first RRU includes physical layer function unit and radio frequency processing functional unit, before the processor 101 of above-mentioned BBU receives the uplink business data that the first RRU is sent by the communication interface 104, the processor 101 is also used to:
Uplink scheduling decision is carried out according to the up-link wireless condition and uplink service information of the user equipment (UE) of acquisition by the MAC layer functional unit of the BBU, to generate uplink scheduling information；Wherein, the acquisition process of the up-link wireless condition includes two kinds of situations, under Time Division Duplex TDD mode, the detection reference signal SRS (sounding reference signal) that base station measurement UE is sent, and receive the CQI information of UE transmission；Under Frequency Division Duplex FDD mode: the SRS that base station measurement UE is sent, receive the power margin information PHR (power headroom report) that UE is reported, the uplink business data includes ascending resource distribution information, control information, modulation demodulation system MCS, transmission mode, antenna port distribution information, HARQ control information etc.；
The uplink scheduling information is sent to the first RRU by the communication interface 104, it is uplink scheduling base band data that the uplink scheduling information, which is used to indicate uplink scheduling information described in physical layer function cell processing of the first RRU by the first RRU, and the uplink scheduling base band data is sent to UE by the radio frequency processing functional unit of the first RRU, and after receiving the UE and responding the uplink scheduling base band data and the uplink business data that sends, the uplink business data is forwarded to the BBU by the radio frequency processing functional unit；
Alternatively,
By the MAC layer functional unit according to the up-link wireless condition of the user equipment (UE) of acquisition and upper Row business information carries out uplink scheduling decision, to generate uplink scheduling information, and is uplink scheduling base band data by uplink scheduling information described in the first physical layer function cell processing；
The uplink scheduling base band data is sent to the first RRU by the communication interface 104, it is the second uplink scheduling base band data that the uplink scheduling base band data, which is used to indicate uplink scheduling base band data described in physical layer function cell processing of the first RRU by the first RRU, and the second uplink scheduling base band data is sent to UE by the radio frequency processing functional unit of the first RRU, and after receiving UE and responding the second uplink scheduling base band data and the uplink business data that sends, the uplink business data is forwarded to the BBU by the radio frequency processing functional unit.
Optionally, in the embodiment of the present invention, in the functional unit that the BBU further includes MAC layer Non real-time processing or more, in the case that first RRU includes the real-time processing function unit of MAC layer and radio frequency processing functional unit, before the processor 101 of above-mentioned BBU receives the uplink business data that the first RRU is sent by the communication interface 104, the processor 101 is also used to:
Uplink scheduling decision is carried out according to the up-link wireless condition and uplink service information of the user equipment (UE) of acquisition by the MAC layer Non real-time processing functional unit of the BBU, to generate uplink scheduling information；
The uplink scheduling information is sent to the first RRU by the communication interface 104, the uplink scheduling information is used to indicate MAC layer real-time processing function unit determining uplink authorization UL grant information in each Transmission Time Interval TTI of the first RRU by the first RRU, and the UL grant information is sent to UE by eating dishes without rice or wine, and the UL grant information is sent to the BBU, the BBU receives physical layer Uplink Shared Channel PUSCH data after receiving the UL grant information, according to the UL grant information.
It is consistent with above-mentioned technical proposal, referring to Fig. 3, Fig. 3 is a kind of flow diagram of data communications method disclosed in embodiment of the present invention method.Although should be noted that this method embodiment can BBU according to Fig.2, realize that above-mentioned example BBU does not constitute unique restriction to data communications method disclosed in embodiment of the present invention method.As shown in figure 3, the data communications method the following steps are included:
S301, baseband processing unit BBU and the first radio frequency remote unit RRU realize that upstream data receives, wherein the BBU includes the first physical layer function unit for the upstream data of the first RRU described in Combined Treatment；
In the specific implementation, the BBU and the first radio frequency remote unit RRU realize the received implementation of upstream data are as follows:
The uplink business data that the first RRU is sent is received, is upstream baseband data by uplink business data described in the first physical layer function cell processing.Wherein, uplink business data described in the first physical layer function cell processing is upstream baseband data, comprising the following steps: inverse fast Fourier transform IFFT and removal cyclic prefix CP in, resource inverse mapping, multiple antennas inverse mapping and quadrature amplitude demodulation, decoding FEC.
S302, the BBU and the 2nd RRU realize that downlink data is sent, wherein the 2nd RRU includes the second physical layer function unit of the Base-Band Processing for downlink data.
It is understood that when above-mentioned BBU and the 2nd RRU realize that downlink data is sent, the internal agreement layer function unit layered mode of BBU and the 2nd RRU can be diversified, and the embodiment of the present invention does not do unique restriction.
In one embodiment, the BBU further includes the functional unit of media access control MAC layer or more, and the 2nd RRU further includes radio frequency processing functional unit, the functional unit of described MAC layer or more for realizing non-physical layer protocol function.Wherein, the functional unit more than MAC layer is the corresponding functional unit of protocol layer in the protocol stack architecture of LTE or lte-a system more than MAC layer, including radio resource control rrc layer functional unit, packet data convergence PDCP layer function unit, wireless spread-spectrum technology rlc layer functional unit.
In the specific implementation, the BBU and the 2nd RRU realizes the implementation that downlink data is sent are as follows:
The BBU carries out descending scheduling decision according to the downlink service data of channel state information CSI and user equipment (UE) by the MAC layer functional unit, generates down dispatch information；Wherein, the CSI includes channel quality indicator (CQI), pre-coding matrix instruction PMI, order instruction RI, the downlink service data includes the business information that core network gateway user face sends over, and the down dispatch information includes downlink resource distribution information, modulation demodulation system MCS, transmission mode, antenna port distribution information, HARQ control information etc.；
The BBU sends the down dispatch information and the downlink service data to the 2nd RRU, it is downgoing baseband signal that the down dispatch information, which is used to indicate the 2nd RRU by downlink service data described in the second physical layer function cell processing, and is sent by the radio frequency processing functional unit to UE The downgoing baseband data.Wherein, 2nd RRU is downgoing baseband signal by the second physical layer function cell processing downlink service data, specifically includes the following steps: forward error correction coding, multiple antenna map and quadrature amplitude modulation, resource impact, inverse fast Fourier transform IFFT and insertion cyclic prefix Cpin.
In another embodiment, the BBU further includes the functional unit of MAC layer Non real-time processing or more, and the 2nd RRU further includes the real-time processing function unit of MAC layer and radio frequency processing functional unit.
In the specific implementation, the BBU and the 2nd RRU realizes the implementation that downlink data is sent are as follows:
The BBU carries out descending scheduling decision according to the downlink service data of CSI and UE by the MAC layer Non real-time processing functional unit, to generate down dispatch information；
The BBU sends the down dispatch information and the downlink service data to the 2nd RRU, the down dispatch information is used to indicate the 2nd RRU and distributes information by the determining downlink resource in each Transmission Time Interval TTI of the real-time processing function unit of the MAC layer, and the downlink service data according to downlink resource distribution information processing is downgoing baseband data, and sends the downgoing baseband data to UE by the radio frequency processing functional unit.
In another embodiment, the first physical layer function unit of the BBU is also used to realize the first Base-Band Processing of the downlink data；It is corresponding, the second physical layer function unit of the 2nd RRU for realizing the downlink data the second Base-Band Processing；
The Base-Band Processing of the downlink data includes first Base-Band Processing and second Base-Band Processing.
Meanwhile the BBU further includes the functional unit of media access control MAC layer or more, the 2nd RRU further includes radio frequency processing functional unit, the functional unit of described MAC layer or more for realizing non-physical layer protocol function.
In the specific implementation, the BBU and the 2nd RRU realizes the implementation that downlink data is sent are as follows:
The BBU carries out descending scheduling decision according to the downlink service data of CSI and UE by the MAC layer functional unit, down dispatch information is generated, and by down dispatch information described in the first physical layer function cell processing and the downlink service data is the first downgoing baseband data；
The BBU sends the first downgoing baseband data to the 2nd RRU, it and by the first downgoing baseband data described in the second physical layer function cell processing is the second downgoing baseband data, and by the radio frequency processing functional unit to UE transmission the second downgoing baseband data.
It can be seen that data communications method provided in an embodiment of the present invention, BBU is being realized with the 2nd RRU During downlink data is sent, the downgoing baseband data of the high-transmission flow generated without transmission by physical layer function cell processing downlink data between BBU and the 2nd RRU, advantageously reduce the transmission bandwidth requirement between BBU and the 2nd RRU, simultaneously, for BBU and the first RRU during row data are received in realization, the uplink business data that BBU can be received and the first RRU of Combined Treatment is sent advantageously reduces the interference between different RRU, system spectral efficiency is improved, system capacity gain is improved.
Optionally, in the embodiment of the present invention, before the BBU carries out descending scheduling decision according to the downlink service data of CSI and UE by the MAC layer functional unit, the BBU also executes following operation:
The original CSI of the 2nd RRU transmission is received, the original CSI is the RRU after the original CSI for receiving UE transmission, Xiang Suoshu BBU forwarding；
It is the CSI by original CSI described in the first physical layer function unit Base-Band Processing.
Optionally, in the embodiment of the present invention, in the functional unit that the BBU further includes media access control MAC layer or more, in the case that first RRU includes physical layer function unit and radio frequency processing functional unit, before above-mentioned BBU receives the uplink business data that the first RRU is sent, the BBU also executes following operation:
Uplink scheduling decision is carried out according to the up-link wireless condition and uplink service information of the user equipment (UE) of acquisition by the MAC layer functional unit of the BBU, to generate uplink scheduling information；Wherein, the acquisition process of the up-link wireless condition includes two kinds of situations, under Time Division Duplex TDD mode, the detection reference signal SRS (sounding reference signal) that base station measurement UE is sent, and receive the CQI information of UE transmission；Under Frequency Division Duplex FDD mode: the SRS that base station measurement UE is sent, receive the power margin information PHR (power headroom report) that UE is reported, the uplink business data includes ascending resource distribution information, control information, modulation demodulation system MCS, transmission mode, antenna port distribution information, HARQ control information etc.；
The uplink scheduling information is sent to the first RRU, it is uplink scheduling base band data that the uplink scheduling information, which is used to indicate uplink scheduling information described in physical layer function cell processing of the first RRU by the first RRU, and the uplink scheduling base band data is sent to UE by the radio frequency processing functional unit of the first RRU, and after receiving the UE and responding the uplink scheduling base band data and the uplink business data that sends, the uplink business data is forwarded to the BBU by the radio frequency processing functional unit；
Alternatively,
Uplink scheduling decision is carried out according to the up-link wireless condition and uplink service information of the user equipment (UE) of acquisition by the MAC layer functional unit, it to generate uplink scheduling information, and is uplink scheduling base band data by uplink scheduling information described in the first physical layer function cell processing；
The uplink scheduling base band data is sent to the first RRU, it is the second uplink scheduling base band data that the uplink scheduling base band data, which is used to indicate uplink scheduling base band data described in physical layer function cell processing of the first RRU by the first RRU, and the second uplink scheduling base band data is sent to UE by the radio frequency processing functional unit of the first RRU, and after receiving UE and responding the second uplink scheduling base band data and the uplink business data that sends, the uplink business data is forwarded to the BBU by the radio frequency processing functional unit.
Optionally, in the embodiment of the present invention, in the functional unit that the BBU further includes MAC layer Non real-time processing or more, in the case that first RRU includes the real-time processing function unit of MAC layer and radio frequency processing functional unit, before above-mentioned BBU receives the uplink business data that the first RRU is sent, the BBU also executes following operation:
Uplink scheduling decision is carried out according to the up-link wireless condition and uplink service information of the user equipment (UE) of acquisition by the MAC layer Non real-time processing functional unit of the BBU, to generate uplink scheduling information；
The uplink scheduling information is sent to the first RRU, the uplink scheduling information is used to indicate MAC layer real-time processing function unit determining uplink authorization UL grant information in each Transmission Time Interval TTI of the first RRU by the first RRU, and the UL grant information is sent to UE by eating dishes without rice or wine, and the UL grant information is sent to the BBU, the BBU receives physical layer Uplink Shared Channel PUSCH data after receiving the UL grant information, according to the UL grant information.
The following is an embodiment of the apparatus of the present invention, referring to Fig. 4, Fig. 4 is a kind of functional unit composition block diagram of BBU disclosed in apparatus of the present invention embodiment.As shown in figure 4, the BBU includes upstream data receiving unit 401 and downlink data transmission unit 402, in which:
The upstream data receiving unit 401, for realizing that upstream data receives with the first radio frequency remote unit RRU, wherein the BBU includes the first physical layer function unit for the upstream data of the first RRU described in Combined Treatment；
In the specific implementation, the upstream data receiving unit 401 is used for:
The uplink business data that the first RRU is sent is received, handling the uplink business data is upstream baseband data.
The downlink data transmission unit 402, for realizing that downlink data is sent with the 2nd RRU, wherein the 2nd RRU includes the second physical layer function unit of the Base-Band Processing for downlink data.
Optionally, the BBU further includes the functional unit of media access control MAC layer or more, and the 2nd RRU further includes radio frequency processing functional unit, the functional unit of described MAC layer or more for realizing non-physical layer protocol function.
Further alternative, the downlink data transmission unit includes the first scheduling decision unit and the first data transmission unit:
The first scheduling decision unit generates down dispatch information for carrying out descending scheduling decision according to the downlink service data of channel state information CSI and user equipment (UE)；
First data transmission unit, for sending the down dispatch information and the downlink service data that the first scheduling decision unit generates to the 2nd RRU, it is downgoing baseband signal that the down dispatch information, which is used to indicate the 2nd RRU and handles the downlink service data, and sends the downgoing baseband data to UE.
Optionally, the BBU further includes the functional unit of MAC layer Non real-time processing or more, and the 2nd RRU further includes the real-time processing function unit of MAC layer and radio frequency processing functional unit.
Further alternative, the downlink data transmission unit includes the second scheduling decision unit and the second data transmission unit:
The second scheduling decision unit, for carrying out descending scheduling decision according to the downlink service data of CSI and UE, to generate down dispatch information；
Second data transmission unit, for sending the down dispatch information and the downlink service data that the second scheduling decision unit generates to the 2nd RRU, the down dispatch information is used to indicate the determining downlink resource in each Transmission Time Interval TTI of the 2nd RRU and distributes information, and the downlink service data according to downlink resource distribution information processing is downgoing baseband data, and sends the downgoing baseband data to UE.
Optionally, the first physical layer function unit of the BBU is also used to realize the downlink data The first Base-Band Processing；It is corresponding, the second physical layer function unit of the 2nd RRU for realizing the downlink data the second Base-Band Processing；
The Base-Band Processing of the downlink data includes first Base-Band Processing and second Base-Band Processing.
Further alternative, the downlink data transmission unit includes third scheduling decision unit and third data transmission unit:
The third scheduling decision unit generates down dispatch information, and handle the down dispatch information and the downlink service data as the first downgoing baseband data for carrying out descending scheduling decision according to the downlink service data of CSI and UE；
The third data transmission unit, for sending the first downgoing baseband data that the third scheduling decision unit generates to the 2nd RRU, it and by the first downgoing baseband data described in the second physical layer function cell processing is the second downgoing baseband data, and send the second downgoing baseband data to UE.
It should be noted that BBU described in apparatus of the present invention embodiment is presented in the form of functional unit.Term " unit " used herein above should be understood as meaning as widest as possible, and the object for realizing function described by each " unit " for example can be integrated circuit ASIC, single circuit, the processor for executing one or more softwares or firmware program and memory, combinational logic circuit, and/or provide other suitable components of the above-mentioned function of realization.
For example, art technology person people could be aware that the composition form of the hardware carrier of the BBU specifically can be BBU shown in Fig. 2.
Wherein, the function of the upstream data receiving unit 401 can be realized by the processor 101 in the BBU, communication interface 104, and specifically described processor 101 indicates that the communication interface 104 and the first radio frequency remote unit RRU realize that upstream data receives；
The function of the downlink data transmission unit 402 can be realized that specifically described processor 101 controls the communication interface 104 and the 2nd RRU realizes that downlink data is sent by the processor 101 in the BBU, communication interface 104；
It can be seen that, the upstream data receiving unit of BBU provided in an embodiment of the present invention and the first radio frequency remote unit RRU realize that upstream data receives, the downlink data transmission unit of BBU and the 2nd RRU realize that downlink data is sent, wherein, BBU includes the first physical layer function unit of the Combined Treatment for the upstream data of the first RRU, and the 2nd RRU includes the second physical layer function of the Base-Band Processing for downlink data Unit, it can be seen that, BBU and the 2nd RRU is during realizing that downlink data is sent, the downgoing baseband data of the high-transmission flow generated without transmission by physical layer function cell processing downlink data between BBU and the 2nd RRU, advantageously reduce the transmission bandwidth requirement between BBU and the 2nd RRU, simultaneously, BBU and the first RRU is during row data are received in realization, the uplink business data that BBU can be received and the first RRU of Combined Treatment is sent, advantageously reduce the interference between different RRU, system spectral efficiency is improved, system capacity gain is improved.
The embodiment of the present invention also provides a kind of computer storage medium, wherein the computer storage medium can be stored with program, which includes some or all of any data communications method recorded in above method embodiment step when executing.
It should be noted that, for the various method embodiments described above, for simple description, therefore, it is stated as a series of action combinations, but those skilled in the art should understand that, the present invention is not limited by the sequence of acts described, because according to the present invention, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art should also know that, the embodiments described in the specification are all preferred embodiments, and related actions and modules are not necessarily necessary for the present invention.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the part being described in detail in some embodiment, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed device can be realized in other ways.Such as, the apparatus embodiments described above are merely exemplary, such as the division of the unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed mutual coupling, direct-coupling or communication connection can be through some interfaces, the indirect coupling or communication connection of device or unit, can be electrical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, and component shown as a unit may or may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, the functional units in various embodiments of the present invention may be integrated into one processing unit, it is also possible to each unit and physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated unit both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and when sold or used as an independent product, can store in a computer-readable access to memory.Based on this understanding, substantially all or part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products technical solution of the present invention in other words, the computer software product is stored in a memory, including some instructions are with so that a computer equipment (can be personal computer, server or network equipment etc.) performs all or part of the steps of the method described in the various embodiments of the present invention.And memory above-mentioned includes: USB flash disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, the various media that can store program code such as magnetic or disk.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is relevant hardware can be instructed to complete by program, the program can store in a computer-readable memory, memory may include: flash disk, read-only memory (English: Read-Only Memory, referred to as: ROM), random access device (English: Random Access Memory, abbreviation: RAM), disk or CD etc..
The embodiment of the present invention has been described in detail above, and used herein a specific example illustrates the principle and implementation of the invention, and the above description of the embodiment is only used to help understand the method for the present invention and its core ideas；At the same time, for those skilled in the art, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, to sum up above-mentioned, and the contents of this specification are not to be construed as limiting the invention.

Claims (24)

  1. A kind of data communications method characterized by comprising
    Baseband processing unit BBU and the first radio frequency remote unit RRU realize that upstream data receives, wherein the BBU includes the first physical layer function unit for the upstream data of the first RRU described in Combined Treatment；
    The BBU and the 2nd RRU realizes that downlink data is sent, wherein the 2nd RRU includes the second physical layer function unit of the Base-Band Processing for downlink data.
  2. According to the method for claim 1, it is characterized in that, the BBU further includes the functional unit of media access control MAC layer or more, and the 2nd RRU further includes radio frequency processing functional unit, the functional unit of described MAC layer or more for realizing non-physical layer protocol function.
  3. The method according to claim 1, wherein the BBU further includes the functional unit of MAC layer Non real-time processing or more, the 2nd RRU further includes the real-time processing function unit of MAC layer and radio frequency processing functional unit.
  4. According to the method described in claim 2, it is characterized in that, the first physical layer function unit of the BBU is also used to realize the first Base-Band Processing of the downlink data；It is corresponding, the second physical layer function unit of the 2nd RRU for realizing the downlink data the second Base-Band Processing；
    The Base-Band Processing of the downlink data includes first Base-Band Processing and second Base-Band Processing.
  5. According to the method described in claim 2, it is characterized in that, the BBU and the 2nd RRU realizes that downlink data is sent, comprising:
    The BBU carries out descending scheduling decision according to the downlink service data of channel state information CSI and user equipment (UE), generates down dispatch information；
    The BBU sends the down dispatch information and the downlink service data to the 2nd RRU, and it is downgoing baseband signal that the down dispatch information, which is used to indicate the 2nd RRU and handles the downlink service data, and sends the downgoing baseband data to UE.
  6. According to the method described in claim 3, it is characterized in that, the BBU and the 2nd RRU realizes that downlink data is sent, comprising:
    The BBU carries out descending scheduling decision according to the downlink service data of CSI and UE, to generate down dispatch information；
    The BBU sends the down dispatch information and the downlink service data to the 2nd RRU, the down dispatch information is used to indicate the 2nd RRU and determines that downlink resource distributes information, and the downlink service data according to downlink resource distribution information processing is downgoing baseband data, and sends the downgoing baseband data to UE.
  7. According to the method described in claim 4, it is characterized in that, the BBU and the 2nd RRU realizes that downlink data is sent, comprising:
    The BBU carries out descending scheduling decision according to the downlink service data of CSI and UE, generates down dispatch information, and handles the down dispatch information and the downlink service data as the first downgoing baseband data；
    The BBU sends the first downgoing baseband data to the 2nd RRU, and handling the first downgoing baseband data is the second downgoing baseband data, and sends the second downgoing baseband data to UE.
  8. According to the described in any item methods of claim 5-7, which is characterized in that the BBU and the first RRU realizes that upstream data receives, comprising:
    The BBU receives the uplink business data that the first RRU is sent, and handling the uplink business data is upstream baseband data.
  9. A kind of baseband processing unit BBU characterized by comprising
    Upstream data receiving unit, for realizing that upstream data receives with the first radio frequency remote unit RRU, wherein the BBU includes the first physical layer function unit for the upstream data of the first RRU described in Combined Treatment；
    Downlink data transmission unit, is used for and the 2nd RRU realizes that downlink data is sent, wherein described the Two RRU include the second physical layer function unit of the Base-Band Processing for downlink data.
  10. BBU according to claim 9, it is characterized in that, the BBU further includes the functional unit of media access control MAC layer or more, and the 2nd RRU further includes radio frequency processing functional unit, the functional unit of described MAC layer or more for realizing non-physical layer protocol function.
  11. BBU according to claim 9, which is characterized in that the BBU further includes the functional unit of MAC layer Non real-time processing or more, and the 2nd RRU further includes the real-time processing function unit of MAC layer and radio frequency processing functional unit.
  12. BBU according to claim 10, which is characterized in that the first physical layer function unit of the BBU is also used to realize the first Base-Band Processing of the downlink data；It is corresponding, the second physical layer function unit of the 2nd RRU for realizing the downlink data the second Base-Band Processing；
    The Base-Band Processing of the downlink data includes first Base-Band Processing and second Base-Band Processing.
  13. BBU according to claim 10, which is characterized in that the downlink data transmission unit includes the first scheduling decision unit and the first data transmission unit:
    The first scheduling decision unit generates down dispatch information for carrying out descending scheduling decision according to the downlink service data of channel state information CSI and user equipment (UE)；
    First data transmission unit, for sending the down dispatch information and the downlink service data that the first scheduling decision unit generates to the 2nd RRU, it is downgoing baseband signal that the down dispatch information, which is used to indicate the 2nd RRU and handles the downlink service data, and sends the downgoing baseband data to UE.
  14. BBU according to claim 11, which is characterized in that the downlink data transmission unit includes the second scheduling decision unit and the second data transmission unit:
    The second scheduling decision unit, for carrying out descending scheduling decision according to the downlink service data of CSI and UE, to generate down dispatch information；
    Second data transmission unit, for sending the down dispatch information and the downlink service data that the second scheduling decision unit generates to the 2nd RRU, the down dispatch information is used to indicate the 2nd RRU and determines that downlink resource distributes information, and the downlink service data according to downlink resource distribution information processing is downgoing baseband data, and sends the downgoing baseband data to UE.
  15. BBU according to claim 12, which is characterized in that the downlink data transmission unit includes third scheduling decision unit and third data transmission unit:
    The third scheduling decision unit generates down dispatch information, and handle the down dispatch information and the downlink service data as the first downgoing baseband data for carrying out descending scheduling decision according to the downlink service data of CSI and UE；
    The third data transmission unit, for sending the first downgoing baseband data that the third scheduling decision unit generates to the 2nd RRU, and handling the first downgoing baseband data is the second downgoing baseband data, and sends the second downgoing baseband data to UE.
  16. The described in any item BBU of 3-15 according to claim 1, which is characterized in that the upstream data receiving unit is used for:
    The uplink business data that the first RRU is sent is received, handling the uplink business data is upstream baseband data.
  17. A kind of baseband processing unit BBU characterized by comprising
    Memory, processor, communication interface and communication bus；
    The memory, the processor connect by the communication bus with the communication interface and complete mutual communication, and the communication interface is for wirelessly communicating；
    The processor calls the executable program code stored in the memory, executes following steps:
    Realize that upstream data receives with the first radio frequency remote unit RRU, wherein the BBU includes the first physical layer function unit for the upstream data of the first RRU described in Combined Treatment；
    Realize that downlink data is sent with the 2nd RRU, wherein the 2nd RRU includes being used for downlink data Base-Band Processing the second physical layer function unit.
  18. BBU according to claim 17, it is characterized in that, the BBU further includes the functional unit of media access control MAC layer or more, and the 2nd RRU further includes radio frequency processing functional unit, the functional unit of described MAC layer or more for realizing non-physical layer protocol function.
  19. BBU according to claim 17, which is characterized in that the BBU further includes the functional unit of MAC layer Non real-time processing or more, and the 2nd RRU further includes the real-time processing function unit of MAC layer and radio frequency processing functional unit.
  20. BBU according to claim 18, which is characterized in that the first physical layer function unit of the BBU is also used to realize the first Base-Band Processing of the downlink data；It is corresponding, the second physical layer function unit of the 2nd RRU for realizing the downlink data the second Base-Band Processing；
    The Base-Band Processing of the downlink data includes first Base-Band Processing and second Base-Band Processing.
  21. BBU according to claim 18, which is characterized in that the processor and the 2nd RRU realize the implementation that downlink data is sent are as follows:
    Descending scheduling decision is carried out according to the downlink service data of channel state information CSI and user equipment (UE), generates down dispatch information；
    The down dispatch information and the downlink service data are sent to the 2nd RRU, it is downgoing baseband signal that the down dispatch information, which is used to indicate the 2nd RRU and handles the downlink service data, and sends the downgoing baseband data to UE.
  22. BBU according to claim 19, which is characterized in that the processor and the 2nd RRU realize the implementation that downlink data is sent are as follows:
    Descending scheduling decision is carried out according to the downlink service data of CSI and UE, to generate down dispatch information；
    The down dispatch information and the downlink service data are sent to the 2nd RRU, the down dispatch information is used to indicate the 2nd RRU and determines that downlink resource distributes information, and according to the downlink The resource allocation information processing downlink service data is downgoing baseband data, and sends the downgoing baseband data to UE.
  23. BBU according to claim 20, which is characterized in that the processor and the 2nd RRU realize the implementation that downlink data is sent are as follows:
    Descending scheduling decision is carried out according to the downlink service data of CSI and UE, generates down dispatch information, and handles the down dispatch information and the downlink service data as the first downgoing baseband data；
    The first downgoing baseband data are sent to the 2nd RRU, and handling the first downgoing baseband data is the second downgoing baseband data, and sends the second downgoing baseband data to UE.
  24. According to the described in any item BBU of claim 21-23, which is characterized in that the processor and the first RRU realize the received implementation of upstream data are as follows:
    The uplink business data that the first RRU is sent is received, handling the uplink business data is upstream baseband data.
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