CN101106766B - Indoor unit and outdoor unit for distributed base station and distributed base station - Google Patents
Indoor unit and outdoor unit for distributed base station and distributed base station Download PDFInfo
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Abstract
Embodiments of the invention relate to a base station technology and disclose a distributed base station. The distributed base station includes an indoor unit and an outdoor unit. The indoor unit includes a transmission layer treatment unit and a first interface unit. The outdoor unit includes a second interface unit, a physical layer treatment unit and a radiofrequency treatment unit. The embodiments in the invention also disclose the indoor unit and outdoor unit of the distributed base station correspondently. The embodiments in the invention can reduce consumption of line resource and can accelerate response speed of the physical layer to holes.
Description
Technical field
The present invention relates to station technology, relate in particular to the indoor unit and the outdoor unit of distributed base station, distributed base station.
Background technology
The base station is the important component part of mobile communication system, mainly communicates by other network elements such as terrestrial interface and base station controllers, and by eating dishes without rice or wine and user terminal communicates.
In traditional base station, the base station is designed in the rack, links to each other with antenna by feeder; The loss ratio of feeder is bigger, causes the waste of resource easily, and cabinet type base station is huge and heavy usually, and addressing and installation are all complicated.The appearance of distributed base station preferably resolves the problems referred to above, distributed base station is made up of Base Band Unit (Base Band Unit is called for short BBU) and remote radio unit (RRU) (RemoteRadio Unit is called for short RRU) usually, BBU can be called as indoor unit again, and RRU can be called as outdoor unit again; Wherein, BBU mainly is responsible for the processing of transport layer and baseband portion, and RRU then mainly is responsible for the processing of radio frequency part, a BBU can support one or more RRU, both can put together, and also can dispose being installed in different geographical position respectively, link to each other by media such as optical fiber or cables; What deserves to be explained is, in some cases, indoor unit can be set at outdoor, outdoor unit can be set at indoor.
A kind of distributed base station is provided in the prior art, and in this base station, baseband functions is comparatively simple, has included only physical layer process, and with reference to the structure chart of figure 1, this base station comprises indoor unit 110 and outdoor unit 120; Indoor unit 110 comprises transport layer process unit 111, physical layer processing unit 112 and first interface unit 113, and outdoor unit 120 comprises second interface unit 121 and RF processing unit 122:
Transport layer process unit 111 is used for the down user data from terrestrial interface opposite side network element is carried out exporting to physical layer processing unit 112 after the transport layer process; And carry out after the transport layer process earthward to the uplink user data of physical layer processing unit 112 output that interface opposite side network element sends;
Physical layer processing unit 112, be used for down user data to transport layer process unit 111 output and carry out after the physical layer process to 113 outputs of first interface unit, described physical layer process to down user data comprise to down user data encode, processing such as modulation; And the uplink user data of first interface unit 113 output carried out after the physical layer process to 111 outputs of transport layer process unit;
First interface unit 113 is used to send the down user data of physical layer processing unit 112 outputs, and receives uplink user data that second interface unit 121 sends and to physical layer processing unit 112 outputs;
Second interface unit 121 is used to receive down user data that first interface unit 113 sends and to RF processing unit 122 outputs, and the uplink user data that sends RF processing unit 122 outputs;
RF processing unit 122, be used for the down user data of second interface unit, 121 outputs is carried out sending to the opposite side entity of eating dishes without rice or wine after the radio frequency processing, and reception is carried out exporting to second interface unit 121 after the radio frequency processing from the uplink user data of the opposite side entity of eating dishes without rice or wine.
In research and practice process to above-mentioned prior art, the inventor finds, the down user data that first interface unit sends to second interface unit is through code modulated digital signal, owing to compare with the un-encoded modulated digital signal, data volume through code modulated digital signal is much bigger, therefore it is excessive that there is the data traffic between the interface unit of indoor unit and outdoor unit in above-mentioned prior art, thus the problem that causes line resource too much to be expended.
Summary of the invention
The technical problem that the embodiment of the invention will solve provides the indoor unit and the outdoor unit of distributed base station, distributed base station.
For solving the problems of the technologies described above, embodiments of the invention provide following technical scheme:
A kind of distributed base station comprises indoor unit and outdoor unit;
Described indoor unit comprises:
The transport layer process unit is used for the down user data from terrestrial interface opposite side network element is carried out exporting after the transport layer process;
First interface unit is used to send the down user data that the transport layer process unit is exported;
Described outdoor unit comprises:
Second interface unit is exported after being used to receive the down user data that first interface unit sends;
Physical layer processing unit is used for the down user data of second interface unit output is carried out exporting after the physical layer process;
RF processing unit is used for the down user data of physical layer processing unit output is carried out sending to the opposite side entity of eating dishes without rice or wine after the radio frequency processing;
Wherein,
RF processing unit also is used to receive the uplink user data from the opposite side entity of eating dishes without rice or wine, and carries out exporting after the radio frequency processing;
Physical layer processing unit also is used for the uplink user data of RF processing unit output is carried out exporting after the physical layer process;
Second interface unit also is used to send the uplink user data of physical layer processing unit output;
First interface unit is exported after also being used to receive the uplink user data that second interface unit sends;
The transport layer process unit also is used for carrying out after the transport layer process earthward to the uplink user data of first interface unit output, and interface opposite side network element sends.
A kind of distributed base station based on the orthogonal frequency division multiplex OFDM technology comprises indoor unit and outdoor unit;
Described indoor unit comprises:
The transport layer process unit is used for the down user data from terrestrial interface opposite side network element is carried out exporting after the transport layer process;
Down channel processing unit, frequency-time domain transformation unit, add window unit and slicing unit, be respectively applied for down user data to the output of transport layer process unit and carry out down channel processing, frequency-time domain transformation, windowing process and multicarrier slicing successively and handle back output;
First interface unit is used to send the down user data that the slicing unit is exported;
Described outdoor unit comprises:
Second interface unit is exported after being used to receive the down user data that first interface unit sends;
RF processing unit is used for the down user data of second interface unit output is carried out sending to the opposite side entity of eating dishes without rice or wine after the radio frequency processing.
A kind of distributed base station based on the OFDM technology comprises indoor unit and outdoor unit;
Described indoor unit comprises:
The transport layer process unit is used for the down user data from terrestrial interface opposite side network element is carried out exporting after the transport layer process;
The down channel processing unit is used for the down user data of transport layer process unit output is carried out exporting after down channel is handled;
First interface unit is used to send the down user data that the down channel processing unit is exported;
Described outdoor unit comprises:
Second interface unit is exported after being used to receive the down user data that first interface unit sends;
The frequency-time domain transformation unit, add window unit, slicing unit, the down user data that is respectively applied for the output of second interface unit carries out exporting after frequency-time domain transformation, windowing process and multicarrier slicing are handled successively, wherein, described frequency-time domain transformation and windowing process are physical layer process;
RF processing unit is used for the down user data of slicing unit output is carried out sending to the opposite side entity of eating dishes without rice or wine after the radio frequency processing.
The present invention also provides the outdoor unit embodiment of distributed base station accordingly, and described outdoor unit can have the structure of outdoor unit described in above-mentioned arbitrary distributed base station of the present invention.
As can be seen from the above technical solutions, the embodiment of the invention is arranged on physical layer processing unit in the outdoor unit with RF processing unit, because the coded modulation of signal is responsible for by physical layer processing unit, therefore, what transmit between indoor unit and outdoor unit is the signal of un-encoded modulation, compared with prior art, can reduce the data traffic between the interface unit of indoor unit and outdoor unit, thereby reduce expending of line resource; On the other hand, because the more close RF processing unit of physical layer processing unit also makes physical layer that the response speed of eating dishes without rice or wine is accelerated.
Description of drawings
Fig. 1 is the structure chart of a kind of distributed base station in the prior art;
Fig. 2～Fig. 8 is respectively the structure chart of distributed base station embodiment one～embodiment seven of the present invention;
Fig. 9～Figure 14 is respectively the structure chart that the present invention is based on the distributed base station embodiment one～embodiment six of OFDM technology.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiment of distributed base station provided by the invention is described in detail.
The embodiment one of distributed base station of the present invention in the present embodiment, is arranged on the physical layer process of user data in the outdoor unit; With reference to structure chart shown in Figure 2, described base station comprises indoor unit 210 and outdoor unit 220; Indoor unit 210 comprises the transport layer process unit 211 and first interface unit 212; Outdoor unit 220 comprises second interface unit 221, physical layer processing unit 222 and RF processing unit 223;
Transport layer process unit 211 is used for the down user data from terrestrial interface opposite side network element is carried out exporting to first interface unit 212 after the transport layer process; And carry out after the transport layer process earthward to the uplink user data of first interface unit 212 output that interface opposite side network element sends;
First interface unit 212 is used for sending the down user data that transport layer process unit 211 is exported to second interface unit 221; And receive after the uplink user data that second interface unit 221 sends to 211 outputs of transport layer process unit;
Second interface unit 221 is used to receive behind the down user data that first interface unit 212 sends to physical layer processing unit 222 outputs; And the uplink user data that sends physical layer processing unit 222 outputs to first interface unit 212;
Physical layer processing unit 222 is used for the down user data of second interface unit, 221 outputs is carried out exporting to RF processing unit 223 after the physical layer process; And to RF processing unit 223 output uplink user data carry out after the physical layer process to 221 outputs of second interface unit;
Wherein, to down user data carry out physical layer process comprise to down user data encode, processing such as modulation;
RF processing unit 223 is used for the down user data of physical layer processing unit 222 outputs is carried out sending to the opposite side entity of eating dishes without rice or wine after the radio frequency processing; And reception is carried out exporting to physical layer processing unit 222 after the radio frequency processing from the uplink user data of the opposite side entity of eating dishes without rice or wine;
Wherein, can use general common radio-frequency interface (Common Public Radio Interface between first interface unit 212 and second interface unit 221, be called for short CPRI), perhaps Open Base Station Architecture (Open Base Station Architecture Initiative, be called for short OBSAI) etc. the industrywide standard interface, perhaps self-defining interface communicates.
Present embodiment is applicable to that Base-Band Processing comprises the base station of physical layer process part, for example the NodeB of universal mobile telecommunications system (Universal Mobile Telecommunications System is called for short UMTS).
The embodiment two of distributed base station of the present invention, please refer to Fig. 3, present embodiment and distributed base station embodiment of the present invention are similar, the difference part is, in the present embodiment, comprise also that between the transport layer process unit 211 and first interface unit 212 medium insert sub-layer processes unit 310, be used for after the processing that down user data to 211 outputs of transport layer process unit carries out medium access control (Medium Access Control is called for short MAC) layer to 212 outputs of first interface unit; And the uplink user data of first interface unit 212 output is carried out after the processing of MAC layer to 211 outputs of transport layer process unit.
Present embodiment is applicable to that Base-Band Processing comprises the base station of physical layer process part and MAC layer processing section.
The embodiment three of distributed base station of the present invention, please refer to Fig. 4, present embodiment and distributed base station embodiment of the present invention two are similar, the difference part is, in the present embodiment, between transport layer process unit 211 and medium access sub-layer processes unit 310, also comprise convergence sub-layer processing unit 410 and data link sub-layers processing unit 420:
Convergence sub-layer processing unit 410 is used for after the processing that down user data to transport layer process unit 211 output carries out PDCP (Packet Data Convergence Protocol is called for short PDCP) layer to 420 outputs of data link sub-layers processing unit; And the uplink user data of data link sub-layer processes unit 420 output is carried out after the processing of PDCP layer to 211 outputs of transport layer process unit;
Data link sub-layers processing unit 420 is used for inserting 310 outputs of sub-layer processes unit to medium after the processing that down user data to convergence sub-layer processing unit 410 output carries out Radio Link control (Radio Link Control is called for short RLC) layer; And medium are inserted the uplink user data of exporting sub-layer processes unit 310 carry out exporting to convergence sub-layer processing unit 410 after the processing of rlc layer.
Present embodiment is applicable to that Base-Band Processing comprises the base station of physical layer process part, MAC layer processing section, rlc layer processing section and PDCP layer processing section, for example the base station of 3G Long Term Evolution research project (longterm evolution is called for short LTE).
Understand for helping, below the concrete processing of parts such as transport layer process, the processing of PDCP layer, rlc layer processing, the processing of MAC layer, physical layer process and radio frequency processing is simply introduced; Be appreciated that in the base station of different systems the concrete processing of each several part is difference to some extent, only (Frequency Division Duplex, FDD) the LTE base station of standard is that example describes with Frequency Division Duplexing (FDD) in the present invention.
Transport layer is carried the business and the signaling of S1 interface and X2 interface based on IP, and on the IP layer, user data also needs the processing through user's face portion (being called for short GTP-U) of User Datagram Protoco (UDP) (being called for short UDP), GPRS tunnel protocol;
The PDCP layer is network and the bridge of eating dishes without rice or wine, and professional in the data that show as on the PDCP layer on the common network, just IP wraps, and then shows as the specific format of air interface under the PDCP layer; The PDCP layer of LTE base station mainly is responsible for functions such as head compression;
Rlc layer mainly guarantees data aloft reliable, the transmission in order of interface by automatic retransmission protocol;
The MAC layer mainly is responsible for user data is mapped on the resource of air interface physical layer;
The processing more complicated of physical layer comprises the processing of down user data increasing cyclic redundancy check (CRC) code, coding, the automatic repeat requests of mixing (being called for short HARQ), interweaving, modulation, frequency-time domain transformation, add processing such as Cyclic Prefix, windowing; Processing and above-mentioned processing symmetry to down user data to uplink user data comprise window, remove Cyclic Prefix, processing such as time-frequency conversion, demodulation, decoding, CRC;
At Radio frequency Processing Unit, RF Processing Unit, to the radio frequency processing of down user data comprise descending digital signal carried out digital pre-distortion, analog-modulated, up-conversion, amplification etc. successively and handles after, be sent to antenna through duplexer and send; Radio frequency processing to uplink user data comprises from antenna receiving signal, obtains up radiofrequency signal through behind the duplexer, carries out processing such as low noise amplification, down-conversion, analog-to-digital conversion successively.
In the embodiment one to embodiment three of distributed base station of the present invention, physical layer processing unit is arranged in the outdoor unit with RF processing unit, because the coded modulation of signal is responsible for by physical layer processing unit, therefore, what transmit between indoor unit and outdoor unit is the signal of un-encoded modulation, compared with prior art, can reduce the data traffic between the interface unit of indoor unit and outdoor unit, thereby reduce expending of line resource; On the other hand, because the more close RF processing unit of physical layer processing unit also makes physical layer that the response speed of eating dishes without rice or wine is accelerated.
The embodiment four of distributed base station of the present invention, please refer to Fig. 5, present embodiment and distributed base station embodiment of the present invention are similar, the difference part is, in the present embodiment, comprise also that between second interface unit 221 and physical layer processing unit 222 medium insert sub-layer processes unit 510, be used for after the processing that down user data to 221 outputs of second interface unit carries out the MAC layer to physical layer processing unit 222 outputs; And the uplink user data of physical layer processing unit 222 output is carried out after the processing of MAC layer to 221 outputs of second interface unit.
Present embodiment is applicable to that Base-Band Processing comprises the base station of physical layer process part and MAC layer processing section.
The embodiment five of distributed base station of the present invention, please refer to Fig. 6, present embodiment and distributed base station embodiment of the present invention four are similar, the difference part is, in the present embodiment, between the transport layer process unit 211 and first interface unit 212, also comprise convergence sub-layer processing unit 610 and data link sub-layers processing unit 620:
Convergence sub-layer processing unit 610 is used for after the processing that down user data to transport layer process unit 211 output carries out the PDCP layer to 620 outputs of data link sub-layers processing unit; And the uplink user data of data link sub-layer processes unit 620 output is carried out after the processing of PDCP layer to 211 outputs of transport layer process unit;
Data link sub-layers processing unit 620 is used for after the processing that down user data to convergence sub-layer processing unit 610 output carries out rlc layer to 212 outputs of first interface unit; And the uplink user data of first interface unit 212 output is carried out after the processing of rlc layer to 610 outputs of convergence sub-layer processing unit.
Present embodiment is applicable to that Base-Band Processing comprises the base station of physical layer process part, MAC layer processing section, rlc layer processing section and PDCP layer processing section.
In the embodiment four and embodiment five of distributed base station of the present invention, except that with physical layer processing unit with RF processing unit is arranged on outdoor unit, the medium that also will carry out the processing of MAC layer insert the sub-layer processes unit and also have been arranged on outdoor unit, because the degree of coupling between processing of MAC layer and the physical layer process is than higher, physical layer processing unit and medium are inserted the sub-layer processes unit all be arranged on outdoor unit and can avoid transmission interaction data between the two between indoor unit and indoor unit, thereby reduce the data volume between indoor unit and the outdoor unit.
The embodiment six of distributed base station of the present invention please refer to Fig. 7, and present embodiment and distributed base station embodiment of the present invention four are similar, and the difference part is, in the present embodiment:
Described second interface unit 221 and medium insert between the sub-layer processes unit 510 and also comprise: data link sub-layers processing unit 710 is used for inserting 510 outputs of sub-layer processes unit to medium after the processing that down user data to 221 outputs of second interface unit carries out rlc layer; And medium are inserted the uplink user data of exporting sub-layer processes unit 510 carry out exporting to second interface unit 221 after the processing of rlc layer;
Also comprise between the described transport layer process unit 211 and first interface unit 212: convergence sub-layer processing unit 720 is used for after the processing that down user data to transport layer process unit 211 output carries out the PDCP layer to 212 outputs of first interface unit; And the uplink user data of first interface unit 212 output is carried out after the processing of PDCP layer to 211 outputs of transport layer process unit.
Present embodiment is applicable to that Base-Band Processing comprises the base station of physical layer process part, MAC layer processing section, rlc layer processing section and PDCP layer processing section.
The embodiment seven of distributed base station of the present invention, please refer to Fig. 8, present embodiment and distributed base station embodiment of the present invention four are similar, the difference part is, in the present embodiment, between second interface unit 221 and medium access sub-layer processes unit 510, also comprise convergence sub-layer processing unit 810 and data link sub-layers processing unit 820:
Convergence sub-layer processing unit 810 is used for after the processing that down user data to the output of second interface unit 221 carries out the PDCP layer to 820 outputs of data link sub-layers processing unit; And the uplink user data of data link sub-layer processes unit 820 output is carried out after the processing of PDCP layer to 221 outputs of second interface unit;
Data link sub-layers processing unit 820 is used for inserting 510 outputs of sub-layer processes unit to medium after the processing that down user data to convergence sub-layer processing unit 810 output carries out rlc layer; And medium are inserted the uplink user data of exporting sub-layer processes unit 510 carry out exporting to convergence sub-layer processing unit 810 after the processing of rlc layer;
Wherein, can use standard interfaces such as Ethernet to communicate between first interface unit 212 and second interface unit 221.
Present embodiment is applicable to that Base-Band Processing comprises the base station of physical layer process part, MAC layer processing section, rlc layer processing section and PDCP layer processing section.
In the embodiment seven of distributed base station of the present invention, to carry out rlc layer data link sub-layers processing unit of handling and the convergence sub-layer processing unit that carries out the PDCP processing and also all be arranged on outdoor unit, because all Base-Band Processing all are set at outdoor unit, therefore greatly reduce the degree of coupling between indoor unit and the indoor unit; On the other hand, Base-Band Processing and radio frequency processing are leaned on closerly, also help the co-design of base band radio frequency.
The present invention also provides the outdoor unit embodiment of distributed base station accordingly, and described outdoor unit can have the structure of outdoor unit described in the invention described above distributed base station embodiment one or embodiment four or embodiment six or the embodiment seven.
The present invention also provides the indoor unit embodiment of distributed base station accordingly, and described indoor unit can have the structure of indoor unit described in the invention described above distributed base station embodiment one or embodiment two or embodiment three or embodiment five or the embodiment six.
When the base station based on OFDM (Orthogonal Frequency Division Multiplexing; be called for short OFDM) when technology realizes; for solving the problem of peak-to-average force ratio; usually can carry out slicing to the downstream signal of baseband processing unit output handles; when adopting the multicarrier slicing to handle; some frequency-region signals that produce need be remapped and be time-domain signal; the processing of time-domain signal normally carries out in physical layer because frequency-region signal transformed to; and in the prior art; the physical layer process part normally is arranged on indoor unit; the slicing processing section then is arranged on outdoor unit; therefore; above-mentioned frequency-region signal need be turned back to indoor unit; partly handle by physical layer process; can make that also the data traffic between the interface unit of indoor unit and outdoor unit is excessive, thus the problem that causes line resource too much to be expended.
For addressing the above problem, the present invention also provides the distributed base station based on the OFDM technology, below the preferred embodiment of described base station is described in detail.
The present invention is based on the distributed base station embodiment one of OFDM technology, in the present embodiment, physical layer process (comprise down channel processing, frequency-time domain transformation and windowing process to down user data, and go window processing, time-frequency conversion and the up channel of the uplink user data are handled) part and the multicarrier slicing processing section of user data are arranged in the indoor unit; With reference to the structure chart of figure 9, described base station comprises indoor unit 910 and outdoor unit 920; Indoor unit 910 comprises transport layer process unit 911, down channel processing unit 912, frequency-time domain transformation unit 913, adds window unit 914, slicing unit 915, first interface unit 916, remove window unit 917, time-frequency conversion unit 918 and up channel processing unit 919; Outdoor unit 920 comprises second interface unit 921 and RF processing unit 922:
Transport layer process unit 911 is used for the down user data from terrestrial interface opposite side network element is carried out exporting to descending channel bank 912 after the transport layer process; And carry out after the transport layer process earthward to the uplink user data of up channel processing unit 919 output that interface opposite side network element sends;
Down channel processing unit 912, frequency-time domain transformation unit 913, add window unit 914 and slicing unit 915, be respectively applied for down user data to 911 outputs of transport layer process unit and carry out down channel processing, frequency-time domain transformation, windowing process and multicarrier slicing successively and handle the back to 916 outputs of first interface unit;
Going window unit 917, time-frequency conversion unit 918 and up channel processing unit 919 to be respectively applied for goes window processing, time-frequency conversion, up channel to handle the back to 911 outputs of transport layer process unit to the uplink user data of first interface unit, 916 outputs successively;
Present embodiment is applicable to that Base-Band Processing comprises the physical layer process part, and based on the base station of OFDM technology.
The present invention is based on the distributed base station embodiment two of OFDM technology, please refer to Figure 10, present embodiment is similar with the distributed base station embodiment one that the present invention is based on the OFDM technology, the difference part is, in the present embodiment, comprise also between transport layer process unit 911 and down channel processing unit 912, the up channel processing unit 919 that medium insert sub-layer processes unit 1010, be used for after the processing that down user data to 911 outputs of transport layer process unit carries out the MAC layer to descending channel bank 912 outputs; And the uplink user data of up channel processing unit 919 output is carried out after the processing of MAC layer to 911 outputs of transport layer process unit.
Present embodiment is applicable to that Base-Band Processing comprises physical layer process part and MAC layer processing section, and based on the base station of OFDM technology.
The present invention is based on the distributed base station embodiment three of OFDM technology, please refer to Figure 11, present embodiment is similar with the distributed base station embodiment two that the present invention is based on the OFDM technology, the difference part is, in the present embodiment, described transport layer process unit 911 and medium insert and also comprise convergence sub-layer processing unit 1110 and data link sub-layers processing unit 1120 between the sub-layer processes unit 1010:
Convergence sub-layer processing unit 1110 is used for after the processing that down user data to transport layer process unit 911 output carries out the PDCP layer to 1120 outputs of data link sub-layers processing unit; And the uplink user data of data link sub-layer processes unit 1120 output is carried out after the processing of PDCP layer to 911 outputs of transport layer process unit;
Data link sub-layers processing unit 1120 is used for inserting 1010 outputs of sub-layer processes unit to medium after the processing that down user data to convergence sub-layer processing unit 1110 output carries out rlc layer; And medium are inserted the uplink user data of exporting sub-layer processes unit 1010 carry out exporting to convergence sub-layer processing unit 1110 after the processing of rlc layer.
Present embodiment is applicable to that Base-Band Processing comprises physical layer process part, MAC layer processing section, rlc layer processing section and PDCP layer processing section, and based on the base station of OFDM technology.
In the more embodiment of the present invention, the invention described above can also be arranged in the outdoor unit based on the distributed base station embodiment one of OFDM technology or the window unit that goes described in embodiment two or the embodiment three.
In the more embodiment of the present invention, the invention described above based on described in the distributed base station embodiment one of OFDM technology or embodiment two or the embodiment three to go window unit and time-frequency conversion unit further be to be arranged in the outdoor unit.
The present invention is based on the distributed base station embodiment four of OFDM technology, in the present embodiment, Channel Processing part in the physical layer process only is set in the indoor unit, and other processing sections in the physical layer process and multicarrier slicing processing section all are arranged in the outdoor unit; With reference to the structure chart of Figure 12, described base station comprises indoor unit 1210 and outdoor unit 1220; Indoor unit 1210 comprises: transport layer process unit 1211, down channel processing unit 1212, first interface unit 1213 and up channel processing unit 1214; Outdoor unit 1220 comprises second interface unit 1221, frequency-time domain transformation unit 1222, adds window unit 1223, slicing unit 1224, RF processing unit 1225, go to window unit 1226 and time-frequency conversion unit 1227:
Transport layer process unit 1211 is used for the down user data from terrestrial interface opposite side network element is carried out exporting to descending channel bank 1212 after the transport layer process; And carry out after the transport layer process earthward to the uplink user data of up channel processing unit 1214 output that interface opposite side network element sends;
Down channel processing unit 1212 is used for the down user data of transport layer process unit 1211 outputs is carried out exporting to first interface unit 1213 after down channel is handled;
Up channel processing unit 1214 is used for that the uplink user data of first interface unit, 1213 outputs is carried out up channel and handles the back to 1211 outputs of transport layer process unit;
Frequency-time domain transformation unit 1222, add window unit 1223, slicing unit 1224, be respectively applied for down user data to 1221 outputs of second interface unit and carry out frequency-time domain transformation, windowing process and multicarrier slicing successively and handle the back to RF processing unit 1225 outputs;
Going to window unit 1226 and time-frequency conversion unit 1227 to be respectively applied for goes to export to second interface unit 1221 behind window processing and the time-frequency conversion to the uplink user data of RF processing unit 1225 outputs successively;
Present embodiment is applicable to that Base-Band Processing comprises the physical layer process part, and based on the base station of OFDM technology.
The present invention is based on the distributed base station embodiment five of OFDM technology, please refer to Figure 13, present embodiment is similar with the distributed base station embodiment four that the present invention is based on the OFDM technology, the difference part is, in the present embodiment, comprise also between described transport layer process unit 1211 and down channel processing unit 1212, the up channel processing unit 1214 that medium insert sub-layer processes unit 1310, be used for after the processing that down user data to 1211 outputs of transport layer process unit carries out the MAC layer to descending channel bank 1212 outputs; And the uplink user data of up channel processing unit 1214 output is carried out after the processing of MAC layer to 1211 outputs of transport layer process unit.
Present embodiment is applicable to that Base-Band Processing comprises physical layer process part and MAC layer processing section, and based on the base station of OFDM technology.
The present invention is based on the distributed base station embodiment six of OFDM technology, please refer to Figure 14, present embodiment is similar with the distributed base station embodiment five that the present invention is based on the OFDM technology, the difference part is, in the present embodiment, described transport layer process unit 1211 and medium insert and also comprise convergence sub-layer processing unit 1410 and data link sub-layers processing unit 1420 between the sub-layer processes unit 1310:
Convergence sub-layer processing unit 1410 is used for after the processing that down user data to transport layer process unit 1211 output carries out the PDCP layer to 1420 outputs of data link sub-layers processing unit; And the uplink user data of data link sub-layer processes unit 1420 output is carried out after the processing of PDCP layer to 1211 outputs of transport layer process unit;
Data link sub-layers processing unit 1420 is used for inserting 1310 outputs of sub-layer processes unit to medium after the processing that down user data to convergence sub-layer processing unit 1410 output carries out rlc layer; And medium are inserted the uplink user data of exporting sub-layer processes unit 1314 carry out exporting to convergence sub-layer processing unit 1410 after the processing of rlc layer.
Present embodiment is applicable to that Base-Band Processing comprises physical layer process part, MAC layer processing section, rlc layer processing section and PDCP layer processing section, and based on the base station of OFDM technology.
In the more embodiment of the present invention, the invention described above can also be arranged in the outdoor unit based on the distributed base station embodiment four of OFDM technology or the up channel processing unit described in embodiment five or the embodiment six.
In the more embodiment of the present invention, the invention described above is arranged in the indoor unit based on the distributed base station embodiment four of OFDM technology or the time-frequency conversion unit further described in embodiment five or the embodiment six.
In the more embodiment of the present invention, the invention described above can also be to be arranged in the indoor unit based on the distributed base station embodiment four or the time-frequency conversion unit described in embodiment five or the embodiment six of OFDM technology with removing window unit.
In the present invention is based on the distributed base station embodiment of OFDM technology, slicing processing unit and frequency-time domain transformation processing unit are arranged in the same entity, promptly all be arranged on indoor unit, or all be arranged on outdoor unit, because when realizing that the multicarrier slicing is handled, therefore no longer need between indoor unit and outdoor unit, carry out the feedback of signal, can reduce the data traffic between the interface unit of indoor unit and outdoor unit, thus the expending of reduction line resource.
The present invention also provides the embodiment based on the indoor unit of the distributed base station of OFDM technology accordingly, and described indoor unit can have the structure of the invention described above based on arbitrary described indoor unit among the distributed base station embodiment one to embodiment six of OFDM technology.
The present invention also provides the embodiment based on the outdoor unit of the distributed base station of OFDM technology accordingly, and described outdoor unit can have the structure of the invention described above based on outdoor unit described in the distributed base station embodiment one of OFDM technology or the embodiment four.
In sum, the embodiment of the invention is arranged on physical layer processing unit in the outdoor unit with RF processing unit, because the coded modulation of signal is responsible for by physical layer processing unit, therefore, what transmit between indoor unit and outdoor unit is the signal of un-encoded modulation, compared with prior art, can reduce the data traffic between the interface unit of indoor unit and outdoor unit, thereby reduce expending of line resource; On the other hand, because the more close RF processing unit of physical layer processing unit also makes physical layer that the response speed of eating dishes without rice or wine is accelerated;
When comprising also in the base station that the MAC layer is handled, except that with physical layer processing unit with RF processing unit is arranged on outdoor unit, the medium that also will carry out the processing of MAC layer insert the sub-layer processes unit and also are arranged on outdoor unit, because the degree of coupling between processing of MAC layer and the physical layer process is than higher, physical layer processing unit and medium are inserted the sub-layer processes unit all be arranged on outdoor unit and can avoid transmission interaction data between the two between indoor unit and indoor unit, thereby reduce the data volume between indoor unit and the outdoor unit;
When comprising also in the base station that rlc layer processing and PDCP layer are handled, to carry out that rlc layer handles the data link sub-layers processing unit and carry out the convergence sub-layer processing unit that PDCP handles and also all be arranged on outdoor unit, because all Base-Band Processing all are set at outdoor unit, therefore greatly reduce the degree of coupling between indoor unit and the indoor unit; On the other hand, Base-Band Processing and radio frequency processing are leaned on closerly, also help the co-design of base band radio frequency;
When realize based on the OFDM technology base station, slicing processing unit and frequency-time domain transformation processing unit are arranged in the same entity, promptly all be arranged on indoor unit, or all be arranged on outdoor unit, because when realizing that the multicarrier slicing is handled, therefore no longer need between indoor unit and outdoor unit, carry out the feedback of signal, can reduce the data traffic between the interface unit of indoor unit and outdoor unit, thus the expending of reduction line resource.
More than the distributed base station that the embodiment of the invention provided, the indoor unit and the outdoor unit of distributed base station are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and thought thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (20)
1. a distributed base station is characterized in that, comprises indoor unit and outdoor unit;
Described indoor unit comprises:
The transport layer process unit is used for the down user data from terrestrial interface opposite side network element is carried out exporting after the transport layer process;
First interface unit is used to send the down user data that the transport layer process unit is exported;
Described outdoor unit comprises:
Second interface unit is exported after being used to receive the down user data that first interface unit sends;
Physical layer processing unit is used for the down user data of second interface unit output is carried out exporting after the physical layer process;
RF processing unit is used for the down user data of physical layer processing unit output is carried out sending to the opposite side entity of eating dishes without rice or wine after the radio frequency processing;
Wherein,
RF processing unit also is used to receive the uplink user data from the opposite side entity of eating dishes without rice or wine, and carries out exporting after the radio frequency processing;
Physical layer processing unit also is used for the uplink user data of RF processing unit output is carried out exporting after the physical layer process;
Second interface unit also is used to send the uplink user data of physical layer processing unit output;
First interface unit is exported after also being used to receive the uplink user data that second interface unit sends;
The transport layer process unit also is used for carrying out after the transport layer process earthward to the uplink user data of first interface unit output, and interface opposite side network element sends.
2. distributed base station as claimed in claim 1 is characterized in that, also comprises between the described transport layer process unit and first interface unit:
Medium insert the sub-layer processes unit, are used for exporting to first interface unit after the processing that down user data to the output of transport layer process unit carries out the media access control MAC layer; And the uplink user data of first interface unit output is carried out export to the transport layer process unit after the processing of MAC layer.
3. distributed base station as claimed in claim 2 is characterized in that, described transport layer process unit and medium insert between the sub-layer processes unit and also comprise:
The convergence sub-layer processing unit is used for exporting after the processing that down user data to transport layer process unit output carries out PDCP PDCP layer;
The data link sub-layers processing unit is used for inserting the output of sub-layer processes unit to medium after the processing that down user data to convergence sub-layer processing unit output carries out Radio Link control rlc layer;
Wherein,
The data link sub-layers processing unit is used for that also medium are inserted the uplink user data of exporting the sub-layer processes unit to carry out exporting after the processing of rlc layer;
The convergence sub-layer processing unit also is used for the uplink user data of data link sub-layer processes unit output is carried out exporting to the transport layer process unit after the processing of PDCP layer.
4. distributed base station as claimed in claim 1 is characterized in that, also comprises between described second interface unit and the physical layer processing unit:
Medium insert the sub-layer processes unit, are used for exporting to physical layer processing unit after the processing that down user data to the output of second interface unit carries out the MAC layer; And the uplink user data of physical layer processing unit output is carried out export to second interface unit after the processing of MAC layer.
5. distributed base station as claimed in claim 4 is characterized in that, also comprises between the described transport layer process unit and first interface unit:
The convergence sub-layer processing unit is used for exporting after the processing that down user data to transport layer process unit output carries out the PDCP layer;
The data link sub-layers processing unit is used for exporting to first interface unit after the processing that down user data to convergence sub-layer processing unit output carries out rlc layer;
Wherein,
The data link sub-layers processing unit also is used for the uplink user data of first interface unit output is carried out exporting after the processing of rlc layer;
The convergence sub-layer processing unit also is used for the uplink user data of data link sub-layer processes unit output is carried out exporting to the transport layer process unit after the processing of PDCP layer.
6. distributed base station as claimed in claim 4 is characterized in that,
Described second interface unit and medium insert between the sub-layer processes unit and also comprise: the data link sub-layers processing unit is used for inserting the output of sub-layer processes unit to medium after the processing that down user data to the output of second interface unit carries out rlc layer; And medium are inserted the uplink user data of exporting the sub-layer processes unit carry out exporting to second interface unit after the processing of rlc layer;
Also comprise between the described transport layer process unit and first interface unit: the convergence sub-layer processing unit is used for exporting to first interface unit after the processing that down user data to transport layer process unit output carries out the PDCP layer; And the uplink user data of first interface unit output is carried out export to the transport layer process unit after the processing of PDCP layer.
7. distributed base station as claimed in claim 4 is characterized in that, described second interface unit and medium insert between the sub-layer processes unit and also comprise:
The convergence sub-layer processing unit is used for exporting after the processing that down user data to second interface unit output carries out the PDCP layer;
The data link sub-layers processing unit is used for inserting the output of sub-layer processes unit to medium after the processing that down user data to convergence sub-layer processing unit output carries out rlc layer;
Wherein,
The data link sub-layers processing unit is used for that also medium are inserted the uplink user data of exporting the sub-layer processes unit to carry out exporting after the processing of rlc layer;
The convergence sub-layer processing unit also is used for the uplink user data of data link sub-layer processes unit output is carried out exporting to second interface unit after the processing of PDCP layer.
8. the outdoor unit of a distributed base station is characterized in that, described outdoor unit has the structure of outdoor unit described in claim 1 or 4 or 6 or 7 described distributed base stations.
9. the indoor unit of a distributed base station is characterized in that, described indoor unit has the structure of indoor unit described in claim 1 or 2 or 3 or 5 or 6 described distributed base stations.
10. the distributed base station based on the orthogonal frequency division multiplex OFDM technology is characterized in that, comprises indoor unit and outdoor unit;
Described indoor unit comprises:
The transport layer process unit is used for the down user data from terrestrial interface opposite side network element is carried out exporting after the transport layer process;
Down channel processing unit, frequency-time domain transformation unit, add window unit and slicing unit, be respectively applied for down user data to the output of transport layer process unit and carry out down channel processing, frequency-time domain transformation, windowing process and multicarrier slicing successively and handle back output;
First interface unit is used to send the down user data that the slicing unit is exported;
Described outdoor unit comprises:
Second interface unit is exported after being used to receive the down user data that first interface unit sends;
RF processing unit is used for the down user data of second interface unit output is carried out sending to the opposite side entity of eating dishes without rice or wine after the radio frequency processing.
11. the distributed base station based on the OFDM technology as claimed in claim 10 is characterized in that,
Described RF processing unit also is used to receive the uplink user data from the opposite side entity of eating dishes without rice or wine, and carries out exporting after the radio frequency processing;
Described second interface unit also is used to send the uplink user data of RF processing unit output;
Described first interface unit is exported after also being used to receive the uplink user data that second interface unit sends;
Between the described transport layer process unit and first interface unit, also comprise window unit, time-frequency conversion unit and up channel processing unit, be respectively applied for and go window processing, time-frequency conversion, up channel to handle the back and export successively to the transport layer process unit to the uplink user data of first interface unit output;
Described transport layer process unit also is used for carrying out after the transport layer process earthward to the uplink user data of up channel processing unit output, and interface opposite side network element sends.
12. the distributed base station based on the OFDM technology as claimed in claim 11 is characterized in that, also comprises between described transport layer process unit and down channel processing unit, the up channel processing unit:
Medium insert the sub-layer processes unit, are used for after the processing that down user data to the output of transport layer process unit carries out the MAC layer to descending channel bank output; And the uplink user data of up channel processing unit output is carried out export to the transport layer process unit after the processing of MAC layer.
13. the distributed base station based on the OFDM technology as claimed in claim 12 is characterized in that, described transport layer process unit and medium insert between the sub-layer processes unit and also comprise:
The convergence sub-layer processing unit is used for exporting after the processing that down user data to transport layer process unit output carries out the PDCP layer;
The data link sub-layers processing unit is used for inserting the output of sub-layer processes unit to medium after the processing that down user data to convergence sub-layer processing unit output carries out rlc layer;
Wherein,
The data link sub-layers processing unit is used for that also medium are inserted the uplink user data of exporting the sub-layer processes unit to carry out exporting after the processing of rlc layer;
The convergence sub-layer processing unit also is used for the uplink user data of data link sub-layer processes unit output is carried out exporting to the transport layer process unit after the processing of PDCP layer.
14. the indoor unit based on the distributed base station of OFDM technology is characterized in that, described indoor unit has the structure of indoor unit described in each described distributed base station of claim 10 to 13.
15. the outdoor unit based on the distributed base station of OFDM technology is characterized in that described outdoor unit has the structure of outdoor unit described in the distributed base station as claimed in claim 10.
16. the distributed base station based on the OFDM technology is characterized in that, comprises indoor unit and outdoor unit;
Described indoor unit comprises:
The transport layer process unit is used for the down user data from terrestrial interface opposite side network element is carried out exporting after the transport layer process;
The down channel processing unit is used for the down user data of transport layer process unit output is carried out exporting after down channel is handled;
First interface unit is used to send the down user data that the down channel processing unit is exported;
Described outdoor unit comprises:
Second interface unit is exported after being used to receive the down user data that first interface unit sends;
The frequency-time domain transformation unit, add window unit, slicing unit, the down user data that is respectively applied for the output of second interface unit carries out exporting after frequency-time domain transformation, windowing process and multicarrier slicing are handled successively, wherein, described frequency-time domain transformation and windowing process are physical layer process;
RF processing unit is used for the down user data of slicing unit output is carried out sending to the opposite side entity of eating dishes without rice or wine after the radio frequency processing.
17. the distributed base station based on the OFDM technology as claimed in claim 16 is characterized in that,
Described RF processing unit also is used to receive the uplink user data from the opposite side entity of eating dishes without rice or wine, and carries out exporting after the radio frequency processing;
Between the described RF processing unit and second interface unit, also comprise window unit and time-frequency conversion unit, be respectively applied for the uplink user data of RF processing unit output is gone to export to second interface unit behind window processing and the time-frequency conversion successively;
Second interface unit also is used to send the uplink user data of converter unit output;
First interface unit is exported after also being used to receive the uplink user data that second interface unit sends;
Between described first interface unit and transport layer process unit, also comprise the up channel processing unit, be used for that the uplink user data of first interface unit output is carried out up channel and handle back output;
The transport layer process unit also is used for carrying out after the transport layer process earthward to the uplink user data of up channel processing unit output, and interface opposite side network element sends.
18. the distributed base station based on the OFDM technology as claimed in claim 17 is characterized in that, also comprises between described transport layer process unit and down channel processing unit, the up channel processing unit:
Medium insert the sub-layer processes unit, are used for after the processing that down user data to the output of transport layer process unit carries out the MAC layer to descending channel bank output; And the uplink user data of up channel processing unit output is carried out export to the transport layer process unit after the processing of MAC layer.
19. the distributed base station based on the OFDM technology as claimed in claim 18 is characterized in that, described transport layer process unit and medium insert between the sub-layer processes unit and also comprise:
The convergence sub-layer processing unit is used for exporting after the processing that down user data to transport layer process unit output carries out the PDCP layer;
The data link sub-layers processing unit is used for inserting the output of sub-layer processes unit to medium after the processing that down user data to convergence sub-layer processing unit output carries out rlc layer;
Wherein,
The data link sub-layers processing unit is used for that also medium are inserted the uplink user data of exporting the sub-layer processes unit to carry out exporting after the processing of rlc layer;
The convergence sub-layer processing unit also is used for the uplink user data of data link sub-layer processes unit output is carried out exporting to the transport layer process unit after the processing of PDCP layer.
20. the outdoor unit based on the distributed base station of OFDM technology is characterized in that, described outdoor unit has the structure of outdoor unit described in claim 16 or 17 described distributed base stations.
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20160718 |