CN105323194A - Base band data exchange apparatus and method - Google Patents

Base band data exchange apparatus and method Download PDF

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Publication number
CN105323194A
CN105323194A CN201410298835.XA CN201410298835A CN105323194A CN 105323194 A CN105323194 A CN 105323194A CN 201410298835 A CN201410298835 A CN 201410298835A CN 105323194 A CN105323194 A CN 105323194A
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module
rru
base band
bbu
interface module
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CN201410298835.XA
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陆海涛
郭丹旦
刘喜林
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ZTE Corp
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ZTE Corp
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Priority to CN201410298835.XA priority Critical patent/CN105323194A/en
Priority to PCT/CN2014/092142 priority patent/WO2015196722A1/en
Publication of CN105323194A publication Critical patent/CN105323194A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25Arrangements specific to fibre transmission
    • H04B10/2575Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention discloses a base band data exchange apparatus and method. The apparatus is arranged between base band units (BBU) and remote RF units (RRF), the BBUs are centrally arranged and form a base band pool. The apparatus includes a BBU interface module, a RRU interface module, an exchange module and a control module. The BBU interface module is connected with the BBUs. The RRU interface module is connected with the RRUs. The exchange module is used to perform base band data exchange between a BBU antenna channel and a RRU antenna channel. The control module is used to control an exchange reflection relationship between the BBU antenna channel and the RRU antenna channel. The present invention also discloses a base band data exchange method.

Description

A kind of base band data switch and method
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of base band data switch and method.
Background technology
Wireless access network (RAN, RadioAccessNetwork) be the important component part of mobile communication network, traditional wireless access network has following characteristics: one, each base station connects the fan antenna of some fixed qties, and covering small region, each base station can only process this community receiving and transmitting signal; Two, the capacity of system is interference-limited, and each base station works alone, and has been difficult to improve spectrum efficiency; Three, base station is usually all based on proprietary platform development " vertical solution ".These features bring following problem: the base station of enormous amount means that the construction investment of great number, site are supporting, site lease and maintenance cost, builds more base station and means more capital expenditure and operation expenses; In addition, the practical efficiency of existing base station is very low, and the average load of network, and can not shared processing ability between different base stations usually well below busy hour load, is also difficult to improve spectrum efficiency; Further, proprietary platform means that mobile operator needs to safeguard multiple incompatible platform, also need higher cost when dilatation or upgrading.
For this reason, industry proposes C-RAN (Centralized, Cooperative, CloudRAN, centralized/collaboration type/cloud computing wireless access network) the concept of novel radio Access Network framework, by centralization, C-RAN arranges that base station realizes reducing base station machine room quantity, reduce energy consumption, adopt Collaborative, Intel Virtualization Technology, realize base station resource and share and dynamic dispatching, improve spectrum efficiency, to reach the operation of low cost, high bandwidth and flexibility ratio.
C-RAN is the change disposed traditional B BU+RRU distributed base station, as shown in Figure 1, wherein BBU and RRU is fixed together traditional B BU+RRU radio communication planar network architecture, and the resource of BBU is separately independently, even if BBU is idle, can not be used by other RRU not being fixedly connected with relation.And C-RAN is by Base Band Unit (BBU, BaseBandUnit) the centralized baseband pool of formation is put together, by fiber groupings transport network (PTN, PacketTransportNetwork) remote radio unit (RRU) (RRU, RadioRemoteUnit) and transmitting antenna is connected.By disposing the centralization of BBU, can greatly reduce base station machine room quantity, reducing the energy consumption of corollary equipment particularly air-conditioning; RRU can arrange from user more close to, thus reduce transmitting power; Use shared baseband pool, more adapt to the tidal effect of mobile communication system, when the late into the night, mobile communication system load was lighter, the portion processing unit can closed in baseband pool realizes economize on electricity.
Existing C-RAN base band focuses in technology, baseband I Q transfer of data between BBU and RRU adopts the soft switch of IPization to realize, namely at transmitting terminal, baseband I Q data are carried out IP encapsulation, then by the medium transmission such as optical fiber, Ethernet, carry out decapsulation at receiving terminal to IP bag, reduction obtains baseband I Q data.This soft switch treatment technology base band data being carried out to IPization, although exchange flexibly, also also exists the problem that time delay is larger, namely in the process of base band data IPization, introduces IP and encapsulates the processing delay such as dress, decapsulation, storage forwarding, transmission.Mobile system is except global system for mobile communications (GSM, GlobalSystemforMobilecommunication), Wideband Code Division Multiple Access (WCDMA) (WCDMA, WidebandCodeDivisionMultipleAccess) outer other all standard, all require that each antenna transmission Absolute timing errors is less than 3us, Long Term Evolution (LTE in addition, LongTermEvolution) system requirements completes hybrid automatic repeat-request (HARQ in 3 subframes, HybridAutomaticRepeatRequest) feed back, this proposes for the delay that base band data exchanges and exchanges higher requirement than ordinary groups.Therefore, the treatment technology of existing C-RAN base band data IPization, its delay problem produced can produce certain adverse effect to C-RAN applying of mobile communication system, in the demand of particularly following 5G mobile communication, require lower time delay, such as, in 5G super-intensive networking application, little base station (SmallCell) also can adopt the base band centralization of C-RAN framework to dispose, because SmallCell often can do switch control rule according to state of affairs, correspondingly frequently carry out distribution and the releasing operation of baseband pool resource, this just requires the time delay that base band data is lower in transmission and exchange process, guarantee that SmallCell baseband pool has enough time resource response to distribute and release command, therefore base band data low time delay exchanges and transmits and can ensure that the performance of the energy efficient that SmallCell baseband pool is disposed realizes.
Summary of the invention
For solving the technical problem of existing existence, the embodiment of the present invention provides a kind of base band data switch and method.
Embodiments provide a kind of base band data switch, described device is between Base Band Unit BBU and remote radio unit (RRU) RRU, described BBU centralized arrangement composition baseband pool, described device comprises: BBU interface module, RRU interface module, Switching Module and control module;
Described BBU interface module, for connecting described BBU;
Described RRU interface module, for connecting described RRU;
Described Switching Module, exchanges for the base band data performed between BBU antenna channels and RRU antenna channels;
Described control module, for controlling the commuting mappings relation of described BBU antenna channels and RRU antenna channels.
Preferably, described BBU interface module, RRU interface module, Switching Module and control module are made up of the on-site programmable gate array FPGA chip of respective numbers respectively.
Preferably, described Switching Module comprises up commutator module and descending commutator module, and described up commutator module and descending commutator module are made up of the fpga chip of respective numbers respectively; The up input interface of described up commutator module connects the up output interface of described RRU interface module, and the descending output interface of described descending commutator module connects the descending input interface of described RRU interface module.
Preferably, described BBU interface module and described Switching Module share fpga chip, fpga chip in described BBU interface module, also as a part of fpga chip of the described Switching Module of composition, the fpga chip in described BBU interface module connects the BBU in described baseband pool.
Preferably, described BBU interface module is further used for, and receives the downgoing baseband data of described BBU, by the input link of described BBU interface module, described downgoing baseband data is input to the base band data switching network of described Switching Module;
Described Switching Module is further used for, under the control of described control module, described downgoing baseband data are exchanged to the control module output link of specifying by described base band data switching network, described control module output link connects the downgoing baseband data switching networks of described RRU interface module;
Described RRU interface module is further used for, under the control of described control module, described downgoing baseband data are exchanged to the RRU interface module output link of specifying by described downgoing baseband data switching networks, described RRU interface module input link connects corresponding RRU light mouth.
Preferably, described RRU interface module is further used for, receive the upstream baseband data of described RRU, by the input link of described RRU interface module, described upstream baseband data is input to the upstream baseband data switching network of described RRU interface module, under the control of described control module, described upstream baseband data is exchanged to the RRU interface module output link of specifying, described RRU interface module output link connects the base band data switching network of described Switching Module;
Described Switching Module is further used for, under the control of described control module, described upstream baseband data is exchanged to the Switching Module output link of specifying by described base band data switching network, described Switching Module output link is connected to the defeated light-emitting window of correspondence of described BBU interface module;
Described BBU interface module is further used for, and described upstream baseband data is sent to described BBU by the defeated light-emitting window of described correspondence.
The embodiment of the present invention additionally provides a kind of base band data switching method, and described method comprises:
Base band data switch between Base Band Unit BBU and remote radio unit (RRU) RRU, the downgoing baseband data of the described BBU received are sent to the described RRU specified by the base band data switching network of described device inside, and the upstream baseband data of the described RRU received is sent to the described BBU specified by the base band data switching network of described device inside.
Preferably, described base band data switch comprises: BBU interface module, RRU interface module, Switching Module and control module, and described BBU interface module, RRU interface module, Switching Module and control module are made up of the on-site programmable gate array FPGA chip of respective numbers respectively.
Preferably, described the downgoing baseband data of the BBU of reception are sent to by the base band data switching network of described device inside the RRU specified, comprise:
Receive the downgoing baseband data of described BBU, by the input link of described BBU interface module, described downgoing baseband data are input to the base band data switching network of described Switching Module;
Under the control of described control module, described downgoing baseband data are exchanged to the control module output link of specifying by described base band data switching network, described control module output link connects the downgoing baseband data switching networks of described RRU interface module;
Described downgoing baseband data are exchanged to the RRU interface module output link of specifying by described downgoing baseband data switching networks, described RRU interface module input link connects corresponding RRU light mouth.
Preferably, described the upstream baseband data of the RRU of reception is sent to by the base band data switching network of described device inside the BBU specified, comprises:
Receive the upstream baseband data of described RRU, by the input link of described RRU interface module, described upstream baseband data is input to the upstream baseband data switching network of described RRU interface module, under the control of described control module, described upstream baseband data is exchanged to the RRU interface module output link of specifying, described RRU interface module output link connects the base band data switching network of described Switching Module;
Under the control of described control module, described upstream baseband data is exchanged to the Switching Module output link of specifying by described base band data switching network, described Switching Module output link is connected to the defeated light-emitting window of correspondence of described BBU interface module;
Described upstream baseband data is sent to described BBU by the defeated light-emitting window of described correspondence.
A kind of base band data switch that the embodiment of the present invention provides and method, base band data exchange is carried out by FPGA, in the base band data exchange process of C-RAN framework, only have a propagation delay time (namely being carried out the propagation delay time of base band data exchange by FPGA), more much lower than the time delay of existing IPization soft switch mode; The base band data switch of the embodiment of the present invention controls in real time to switching and routing, realizes the mapping association between baseband pool and RRU flexibly.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of traditional B BU+RRU radio communication planar network architecture;
Fig. 2 is the C-RAN group-network construction schematic diagram of the BBU+ Large Copacity base band data switch+RRU of the embodiment of the present invention;
Fig. 3 is the composition structural representation of a kind of base band data switch of the embodiment of the present invention;
Fig. 4 is a kind of Large Copacity base band exchange machine inner connecting structure schematic diagram of the embodiment of the present invention;
Fig. 5 is a kind of RRU interface module of Large Copacity base band exchange machine and the connection diagram of Switching Module of the embodiment of the present invention;
Fig. 6 is the inner connection diagram of Switching Module of a kind of Large Copacity base band exchange machine of the embodiment of the present invention;
Fig. 7 is a kind of BBU interface module of Large Copacity base band exchange machine and the connection diagram of Switching Module of the embodiment of the present invention;
Fig. 8 is the inside schematic diagram of the Switching Module fpga chip of a kind of Large Copacity base band exchange machine of the embodiment of the present invention;
Fig. 9 is the inside schematic diagram of the RRU interface module fpga chip of a kind of Large Copacity base band exchange machine of the embodiment of the present invention;
Figure 10 is a kind of downgoing baseband data exchange processing flow chart of the embodiment of the present invention;
Figure 11 is that a kind of upstream baseband data of the embodiment of the present invention exchanges process chart.
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the present invention is further elaborated.
The embodiment of the present invention is the improvement on C-RAN group-network construction basis, as shown in Figure 2, the embodiment of the present invention is forming between baseband pool and RRU by BBU centralized arrangement, set up base band data switch, this base band data switch can be Large Copacity base band data switch, and base band data switch can by all BBU and RRU of Fiber connection; Annexation between BBU and RRU is not fixed, and by base band data switch Dynamic controlling, by Dynamic controlling, BBU can establish a connection with any number of RRU, or BBU is in Idle state, does not namely have annexation with any one RRU.Wherein, BBU can be wireless base station, Large Copacity base band exchange machine can with BBU layout independently, namely Large Copacity base band exchange machine and BBU are deployed in different machine rooms respectively; Certainly, Large Copacity base band exchange machine and all BBU also can be arranged in same core net machine room, to realize reducing traditional base station machine room quantity.RRU can be distributed in each wireless area in city.
A kind of base band data switch of the embodiment of the present invention, as shown in Figure 3, this device comprises: BBU interface module 10, RRU interface module 20, Switching Module 30 and control module 40; Wherein,
BBU interface module 10, for connecting BBU;
RRU interface module 20, for connecting RRU;
Switching Module 30, exchanges for the base band data performed between BBU antenna channels and RRU antenna channels;
Control module 40, for the commuting mappings relation of control BBU antenna channels and RRU antenna channels.
Preferably, the BBU interface module 10 of the embodiment of the present invention, RRU interface module 20, Switching Module 30 and control module 40 are made up of field programmable gate array (FPGA, the FieldProgrammableGateArray) chip of respective numbers respectively.That is, the base band data switch of the embodiment of the present invention can be realized by the fpga chip of some.
Preferably, when specifically implementing, BBU interface module 10 support provides 384 10G light mouths or 768 6.144G light mouths or 1536 2.5G light mouths to connect BBU; RRU interface module 20 support provides 768 10G light mouths or 1536 6.144G light mouths or 3072 2.5G light mouths to connect RRU.
Preferably, Switching Module 30 comprises up commutator module and descending commutator module, and described up commutator module and descending commutator module are made up of the fpga chip of respective numbers respectively; The up input interface of described up commutator module connects the up output interface of described RRU interface module, and the descending output interface of described descending commutator module connects the descending input interface of described RRU interface module.Up commutator module and descending commutator module are respectively used to the exchange transmission of upstream baseband data and downgoing baseband data.
Preferably, BBU interface module 10 and Switching Module 30 can share fpga chip, the fpga chip namely in BBU interface module 10, and also as a part of fpga chip of composition Switching Module 30, the fpga chip in BBU interface module 10 connects the BBU in baseband pool.
Preferably, BBU interface module 10 is further used for, and receives the downgoing baseband data of BBU, by the input link of BBU interface module 10, described downgoing baseband data is input to the base band data switching network of Switching Module 30;
Switching Module 30 is further used for, under the control of control module 40, downgoing baseband data are exchanged to the control module output link of specifying by described base band data switching network, described control module output link connects the downgoing baseband data switching networks of described RRU interface module 20;
Described RRU interface module 20 is further used for, under the control of described control module 40, described downgoing baseband data are exchanged to the RRU interface module output link of specifying by described downgoing baseband data switching networks, described RRU interface module input link connects corresponding RRU light mouth.
Preferably, RRU interface module 20 is further used for, receive the upstream baseband data of RRU, by the input link of RRU interface module 20, described upstream baseband data is input to the upstream baseband data switching network of RRU interface module 20, under the control of control module 40, described upstream baseband data is exchanged to the RRU interface module output link of specifying, described RRU interface module output link connects the base band data switching network of described Switching Module 30;
Switching Module 30 is further used for, under the control of control module 40, described upstream baseband data is exchanged to the Switching Module output link of specifying by described base band data switching network, described Switching Module output link is connected to the defeated light-emitting window of correspondence of described BBU interface module 10;
BBU interface module 10 is further used for, and described upstream baseband data is sent to BBU by the defeated light-emitting window of described correspondence.
Below in conjunction with a kind of concrete internal structure of Large Copacity base band exchange machine, the base band data switch of the embodiment of the present invention and the C-RAN network architecture that comprises described base band data switch are elaborated further.
As Fig. 4, a kind of Large Copacity base band exchange machine of the embodiment of the present invention comprises RRU interface module, BBU interface module, Switching Module and control module.Described RRU interface module is made up of (RRUFPGA0 ~ RRUFPGA11 as in Fig. 4) 12 pieces of fpga chips, fpga chip in the present embodiment can select the XC7VX1140T chip of Xilinx company, there are 96 road Serdes (SERializer/DESerializer, series connection/deserializer) interface, below 13G common public radio interface (CPRI, CommonPublicRadioInterface) Fiber connection is all supported on every road.
The process structure of each fpga chip of the RRU interface module of the embodiment of the present invention is identical, 64 road Serdes interfaces of each fpga chip are used for connecting RRU, 16 road Serdes interfaces are used for connection Switching Module (i.e. up commutator module), 16 road Serdes interfaces are used for connecting another Switching Module (i.e. descending commutator module), as shown in the RRU interface module of the embodiment of the present invention of Fig. 5 and the connection layout of Switching Module.Described Switching Module is made up of the submodule that two groups of structures are identical, often organize submodule to be made up of 6 fpga chips, shown in the inner connection layout of Switching Module as the embodiment of the present invention of Fig. 6, commutator module one is made up of SWFPGA0, SWFPGA1, SWFPGA4, SWFPGA5, BBUFPGA0, BBUFPGA1, wherein 96 input Serdes interfaces of SWFPGA0, SWFPGA1 are used for connecting RRU interface module, export Serdes interface and be divided into two parts, wherein 48 road Serdes interfaces output to SWFPGA4, and other 48 road Serdes interfaces output to SWFPGA5; 96 input Serdes interfaces of SWFPGA4, SWFPGA5 are used for connecting SWFPGA0, SWFPGA1, and export and be divided into two parts, 48 road Serdes interfaces output to BBUFPGA0, and other 48 road Serdes interfaces output to BBUFPGA1.Same, commutator module two is made up of SWFPGA2, SWFPGA3, SWFPGA6, SWFPGA7, BBUFPGA2, BBUFPGA3, wherein 96 input Serdes interfaces of SWFPGA2, SWFPGA3 are used for connecting RRU interface module, export Serdes interface and be divided into two parts, wherein 48 road Serdes interfaces output to SWFPGA6, and other 48 road Serdes interfaces output to SWFPGA7; 96 input Serdes interfaces of SWFPGA6, SWFPGA7 are used for connecting SWFPGA2, SWFPGA3, and export Serdes interface and be divided into two parts, wherein 48 road Serdes interfaces output to BBUFPGA2, and other 48 road Serdes interfaces output to BBUFPGA3.One of them in commutator module one and commutator module two exchanges transmission for upstream baseband data, and another transmits for downgoing baseband exchanges data.
In addition, as shown in Figure 4, BBUFPGA0, BBUFPGA1, BBUFPGA2, BBUFPGA3 co-used chip of BBU interface module and Switching Module.Be illustrated in figure 7 the connection layout of BBU interface module and Switching Module, the CPRI interface of Switching Module exports the light mouth being directly connected to BBU interface and exports; Described control module is used for controlling the Serdes link of all fpga chip inside and the commuting mappings relation of carrying CPRI frame base band data path.
Fig. 8 is the inside schematic diagram of the Switching Module fpga chip of the Large Copacity base band exchange machine of the embodiment of the present invention, comprise 96 CPRI inputs and 96 CPRI outputs, each CPRI link rate is 10Gbps, connected by base band data switching network between constrained input link, the exchange annexation of base band data is controlled by control module, for 20M4 antenna configuration, form the antenna channels switching network of 768 × 768.
Fig. 9 is the inside schematic diagram of the RRU interface module fpga chip of the Large Copacity base band exchange machine of the embodiment of the present invention, be divided into uplink and downlink two parts switching network to connect, wherein, ascender comprises 64 CPRI inputs and 32 CPRI export, each CPRI link rate is 10Gbps, connected by upstream baseband data switching network between constrained input link, the exchange annexation of base band data is controlled by control module, for 20M4 antenna configuration, form the up switching network of antenna channels of 512 × 128; Descender comprises 32 CPRI inputs and 64 CPRI export, each CPRI link rate is 10Gbps, connected by downgoing baseband data switching networks between constrained input link, the exchange annexation of base band data is controlled by control module, for 20M4 antenna configuration, form the descending switching network of antenna channels of 128 × 512.
The base band data switch of the embodiment of the present invention and comprise the C-RAN network architecture of described base band data switch, base band data exchange is carried out by FPGA, in the base band data exchange process of C-RAN framework, only has a propagation delay time (namely FPGA carries out the propagation delay time of base band data exchange), more much lower than the time delay of existing IPization soft switch mode, the base band data switch of the embodiment of the present invention controls in real time to switching and routing simultaneously, achieves the mapping association between baseband pool and RRU flexibly.
Based on the embodiment of the present invention base band data switch and comprise the C-RAN network architecture of described base band data switch, the embodiment of the present invention additionally provides a kind of base band data switching method, mainly comprise: the base band data switch between BBU and RRU, the downgoing baseband data of the BBU of reception are sent to by the base band data switching network of described device inside the RRU specified, and the upstream baseband data of the RRU of reception is sent to by the base band data switching network of described device inside the BBU specified.
Wherein, base band data switch comprises: BBU interface module, RRU interface module, Switching Module and control module, and described BBU interface module, RRU interface module, Switching Module and control module are made up of the on-site programmable gate array FPGA chip of respective numbers respectively.The function of each module as in the preceding embodiment, repeats no more herein.
Wherein, the downgoing baseband data of the BBU of reception are sent to by inner base band data switching network the RRU specified by base band data switch, description be the exchange transmitting procedure of downgoing baseband data, as shown in Figure 10, this process specifically comprises:
Step 1001, base band data switch receives the downgoing baseband data of BBU by BBU interface module.
The downgoing baseband data of BBU are connected to the BBU interface module of base band data switch by optical fiber interface.
Downgoing baseband data, by the input link of BBU interface module, are input to the base band data switching network of Switching Module by step 1002.
Downgoing baseband data, under the control of control module, are exchanged to the control module output link of specifying by step 1003 by base band data switching network, control module output link connects the downgoing baseband data switching networks of RRU interface module.
Step 1004, downgoing baseband data are exchanged to the RRU interface module output link of specifying by downgoing baseband data switching networks, described RRU interface module input link connects corresponding RRU light mouth, is namely the RRU device that final BBU downgoing baseband data need to connect.
Wherein, the upstream baseband data of the RRU of reception is sent to by the base band data switching network of described device inside the BBU specified by base band data switch, description be the exchange transmitting procedure of upstream baseband data, as shown in figure 11, this process specifically comprises:
Step 1101, base band data switch receives the upstream baseband data of RRU by RRU interface module.
The upstream baseband data of RRU is connected to the RRU interface module of base band data switch by optical fiber interface.
Step 1102, by the input link of RRU interface module, upstream baseband data is input to the upstream baseband data switching network of RRU interface module, under the control of control module, upstream baseband data is exchanged to the RRU interface module output link of specifying, RRU interface module output link connects the base band data switching network of Switching Module.
The upstream baseband data of RRU is input to upstream baseband data switching network by the CPRI input link of RRU interface module, is controlled by control module, exchanges to the RRU interface module CPRI output link of specifying; RRU interface module CPRI output link is connected to the base band data switching network of Switching Module, is controlled by control module, exchanges to the Switching Module CPRI output link of specifying.
Step 1103, under the control of control module, exchanges to the Switching Module output link of specifying by base band data switching network by upstream baseband data, Switching Module output link is connected to the defeated light-emitting window of correspondence of BBU interface module.
Switching Module CPRI output link is connected to the defeated light-emitting window of correspondence of BBU interface module, is namely the BBU equipment that final RRU upstream baseband data needs to connect.
Step 1104, sends to BBU by upstream baseband data by corresponding defeated light-emitting window.
In sum, the embodiment of the present invention carries out base band data exchange by FPGA, in the base band data exchange process of C-RAN framework, only have a propagation delay time (namely being carried out the propagation delay time of base band data exchange by FPGA), more much lower than the time delay of existing IPization soft switch mode; The base band data switch of the embodiment of the present invention controls in real time to switching and routing, realizes the mapping association between baseband pool and RRU flexibly.In addition, the embodiment of the present invention supports the concentrating of C-RAN, cooperation and the optimized integration of cloud computing, and power system capacity is large, the C-RAN that can meet a large size city uses, be conducive to the minimizing energy consumption of maximum performance C-RAN, the advantage of baseband pool resource-sharing, for applying of C-RAN serves facilitation.
The base band data switch of the embodiment of the present invention, for 20M8 antenna configuration, supports that BBU with RRU of 384 × 768 exchanges and is connected; Or for 20M4 antenna configuration, support that BBU with RRU of 768 × 1536 exchanges and be connected; Or for 20M2 antenna configuration, support that BBU with RRU of 1536 × 3072 exchanges and be connected, it can meet the layout quantitative requirement of BBU and RRU that wireless area, a large size city covers completely.Such as: for 20M4 antenna configuration, the capacity of the Switching Module of the base band data switch of the embodiment of the present invention is 3072 × 6144 antenna channels, and the concentrated ratio of BBU and RRU is 1:2, realizes base station resource and shares, improve spectrum efficiency; And the control module of base band data switch is used for the commuting mappings relation of control BBU antenna and RRU antenna, support to realize base station virtualization.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of hardware embodiment, software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.

Claims (10)

1. a base band data switch, it is characterized in that, described device is between Base Band Unit BBU and remote radio unit (RRU) RRU, and described BBU centralized arrangement forms baseband pool, and described device comprises: BBU interface module, RRU interface module, Switching Module and control module;
Described BBU interface module, for connecting described BBU;
Described RRU interface module, for connecting described RRU;
Described Switching Module, exchanges for the base band data performed between BBU antenna channels and RRU antenna channels;
Described control module, for controlling the commuting mappings relation of described BBU antenna channels and RRU antenna channels.
2. base band data switch according to claim 1, it is characterized in that, described BBU interface module, RRU interface module, Switching Module and control module are made up of the on-site programmable gate array FPGA chip of respective numbers respectively.
3. base band data switch according to claim 2, it is characterized in that, described Switching Module comprises up commutator module and descending commutator module, and described up commutator module and descending commutator module are made up of the fpga chip of respective numbers respectively; The up input interface of described up commutator module connects the up output interface of described RRU interface module, and the descending output interface of described descending commutator module connects the descending input interface of described RRU interface module.
4. base band data switch according to claim 2, it is characterized in that, described BBU interface module and described Switching Module share fpga chip, fpga chip in described BBU interface module, also as a part of fpga chip of the described Switching Module of composition, the fpga chip in described BBU interface module connects the BBU in described baseband pool.
5. base band data switch according to any one of Claims 1-4, is characterized in that,
Described BBU interface module is further used for, and receives the downgoing baseband data of described BBU, by the input link of described BBU interface module, described downgoing baseband data is input to the base band data switching network of described Switching Module;
Described Switching Module is further used for, under the control of described control module, described downgoing baseband data are exchanged to the control module output link of specifying by described base band data switching network, described control module output link connects the downgoing baseband data switching networks of described RRU interface module;
Described RRU interface module is further used for, under the control of described control module, described downgoing baseband data are exchanged to the RRU interface module output link of specifying by described downgoing baseband data switching networks, described RRU interface module input link connects corresponding RRU light mouth.
6. base band data switch according to any one of Claims 1-4, is characterized in that,
Described RRU interface module is further used for, receive the upstream baseband data of described RRU, by the input link of described RRU interface module, described upstream baseband data is input to the upstream baseband data switching network of described RRU interface module, under the control of described control module, described upstream baseband data is exchanged to the RRU interface module output link of specifying, described RRU interface module output link connects the base band data switching network of described Switching Module;
Described Switching Module is further used for, under the control of described control module, described upstream baseband data is exchanged to the Switching Module output link of specifying by described base band data switching network, described Switching Module output link is connected to the defeated light-emitting window of correspondence of described BBU interface module;
Described BBU interface module is further used for, and described upstream baseband data is sent to described BBU by the defeated light-emitting window of described correspondence.
7. a base band data switching method, is characterized in that, described method comprises:
Base band data switch between Base Band Unit BBU and remote radio unit (RRU) RRU, the downgoing baseband data of the described BBU received are sent to the described RRU specified by the base band data switching network of described device inside, and the upstream baseband data of the described RRU received is sent to the described BBU specified by the base band data switching network of described device inside.
8. base band data switching method according to claim 7, it is characterized in that, described base band data switch comprises: BBU interface module, RRU interface module, Switching Module and control module, and described BBU interface module, RRU interface module, Switching Module and control module are made up of the on-site programmable gate array FPGA chip of respective numbers respectively.
9. base band data switching method according to claim 8, is characterized in that, described the downgoing baseband data of the BBU of reception is sent to by the base band data switching network of described device inside the RRU specified, and comprising:
Receive the downgoing baseband data of described BBU, by the input link of described BBU interface module, described downgoing baseband data are input to the base band data switching network of described Switching Module;
Under the control of described control module, described downgoing baseband data are exchanged to the control module output link of specifying by described base band data switching network, described control module output link connects the downgoing baseband data switching networks of described RRU interface module;
Described downgoing baseband data are exchanged to the RRU interface module output link of specifying by described downgoing baseband data switching networks, described RRU interface module input link connects corresponding RRU light mouth.
10. base band data switching method according to claim 9, is characterized in that, described the upstream baseband data of the RRU of reception is sent to by the base band data switching network of described device inside the BBU specified, and comprising:
Receive the upstream baseband data of described RRU, by the input link of described RRU interface module, described upstream baseband data is input to the upstream baseband data switching network of described RRU interface module, under the control of described control module, described upstream baseband data is exchanged to the RRU interface module output link of specifying, described RRU interface module output link connects the base band data switching network of described Switching Module;
Under the control of described control module, described upstream baseband data is exchanged to the Switching Module output link of specifying by described base band data switching network, described Switching Module output link is connected to the defeated light-emitting window of correspondence of described BBU interface module;
Described upstream baseband data is sent to described BBU by the defeated light-emitting window of described correspondence.
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