CN102291725B - Multimode digital radio frequency remote system - Google Patents
Multimode digital radio frequency remote system Download PDFInfo
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- CN102291725B CN102291725B CN201110000703.0A CN201110000703A CN102291725B CN 102291725 B CN102291725 B CN 102291725B CN 201110000703 A CN201110000703 A CN 201110000703A CN 102291725 B CN102291725 B CN 102291725B
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- 239000013307 optical fiber Substances 0.000 claims abstract description 39
- 230000006855 networking Effects 0.000 claims abstract description 8
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- 230000005540 biological transmission Effects 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 230000005611 electricity Effects 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 3
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- 244000189548 Chrysanthemum x morifolium Species 0.000 claims 1
- 238000009432 framing Methods 0.000 description 22
- 239000000835 fiber Substances 0.000 description 8
- 238000004891 communication Methods 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
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- 230000001360 synchronised effect Effects 0.000 description 4
- 238000010295 mobile communication Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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Abstract
The invention discloses a multimode digital radio frequency remote system, which comprises at least one far end covering machine, a base band router and a plurality of near end relays, wherein the far end covering machine is connected with the base band router, and the base band router is then respectively connected with each near end relay, is used for receiving signals in different systems in the near end relays, sends the merged signals to the remote end covering machine, receives the signals in the far end covering machine and respectively sends the dismounted signals to each near end relay in correspondingly systems. The multimode digital radio frequency remote system can solve the problem that when the near end relays in different systems are not in the same plate and no optical fiber connection is adopted between the near end relays in different systems, the application of the multimode digital radio frequency remote system is limited, the application limitation of the multimode digital radio frequency remote system is improved, the flexible application of the multimode digital radio frequency remote system is realized, in addition, the multimode digital radio frequency remote system can save a large number of optical fiber resources, the networking is convenient, and good market prospects are realized.
Description
Technical field
The present invention relates to digital direct discharging station design field, be specifically related to a kind of multimode digital radio frequency remote.
Background technology
In mobile communications network, digital RF far-drawing system is as the extension of base station in overlay network and supplement, and can improve signal quality, solves the Special Handle of Drop Question of weak signal area and blind area, day by day becomes the major part that mobile communications network covers.In present stage mobile communications network, 2G internet and 3G network is by long-term co-existence, the 2G network that mobile operator has at present the TD licence plate of 3G network and runs always, add more and more widely used wlan network, possesses the multimode digital radio frequency remote of 2G, 3G and WLAN transmission simultaneously, will carry out many nets to operator builds together and saves a large amount of cost, also the engineering that can build together to many nets is brought very large facility, therefore has market prospects widely.
Taking TD+GSM+WLAN multimode digital radio frequency remote as example: the GSM of this system is descending be by GSM relay directly from base station coupling downstream signal,, cover through amplifying after processing to far-end mulch-laying machine through optical fiber transmission; GSM is up is that signal is connected to base station receiving terminal by coupler from far-end mulch-laying machine reaches relaying terminal.TD is descending be TD near-end from TD-RRU direct-coupling downstream signal, through optical fiber transmission to far-end mulch-laying machine, through amplification process after cover; TD is up is that signal is connected to TD-RRU receiving terminal by coupler from far-end mulch-laying machine reaches relaying terminal.WLAN transmission is a transparent baseband transmission link to be provided between GSM near-end and far-end or between TD near-end and far-end, to make full use of existing fiber resource.Realize multimode digital radio frequency remote, the description of the course of work of the communication network by above-mentioned different systems, can find a defect, working as GSM base station and TD-RRU is not in same place, and the words that do not have fiber resource to connect between two places, bring significant limitation can to like this application of multimode digital radio frequency remote, be unfavorable for very much the propagation and employment of multimode digital radio frequency remote.
Summary of the invention
For addressing the above problem, the present invention discloses a kind of multimode digital radio frequency remote, can solve relay when multiple different network formats not in same place, and the problem that does not have each other the application of multimode digital radio frequency remote in situation that fiber resource connects to be restricted.
The present invention adopts following technical scheme:
A kind of multimode digital radio frequency remote, comprises at least one far-end mulch-laying machine, base band router and multiple near-end repeater; Far-end mulch-laying machine is connected with base band router, and base band router is connected with each near-end repeater respectively again;
Base band router, for receiving the signal of multiple near-end repeater different systems, merges processing, and the signal after merging is sent to far-end mulch-laying machine; And receive the signal in far-end mulch-laying machine, carry out deconsolidation process, and the signal after splitting is sent to respectively to each near-end repeater of corresponding standard;
Described near-end repeater is used for the signal of the corresponding standard that receives different base station transmission, after merging, sends to described base band router with WLAN signal; And receive WLAN signal in described base band router and the signal of described corresponding standard, carry out, after deconsolidation process, the signal of described corresponding standard is sent to corresponding base station.
Multimode digital radio frequency remote in the present invention, before far-end is zoomed out separately in the near-end relay of different systems, with base band router, the signal of multiple types being closed to road processes, the signal of multiple types can be transmitted in an optical fiber, Zai Bagaihe road signal carries out many nets by far-end mulch-laying machine and covers, and so just can realize the flexible Application of multimode digital radio frequency remote; And radio frequency stretch system of the present invention, can save in a large number fiber resource, networking flexibility is convenient, has good market prospects.
Brief description of the drawings
Fig. 1 is multimode digital radio frequency remote schematic diagram;
Fig. 2 is base band router hardware digital module block diagram;
Fig. 3 is base band router downlink transfer chain graph;
Fig. 4 is base band router uplink chain graph;
Fig. 5 is specific embodiment one multimode digital radio frequency remote schematic diagram;
Fig. 6 is specific embodiment two multimode digital radio frequency remote schematic diagrames.
Embodiment
The invention provides a kind of multimode digital radio frequency remote, this system can solve the relay of different network formats in prior art not in same place, and between two places, there is no the problem that in situation that fiber resource connects, the application of multimode digital radio frequency remote is restricted.
Multimode digital radio frequency remote provided by the invention, comprises at least one far-end mulch-laying machine, base band router and multiple near-end repeater, and far-end mulch-laying machine is connected with base band router, and base band router is also connected with each near-end repeater respectively; The function of base band router is the signal that receives different systems in multiple near-end repeaters, sends signal to far-end mulch-laying machine after merging processing; And receive the signal in far-end mulch-laying machine, carry out signal being sent to respectively after deconsolidation process each near-end repeater of corresponding standard, as shown in Figure 1.Describe technical scheme of the present invention in detail below in conjunction with accompanying drawing.
Embodiment mono-
Taking the multimode digital radio frequency remote of GSM+TD+WLAN as example, multimode digital radio frequency remote of the present invention, comprises GSM repeater, TD repeater, far-end mulch-laying machine and base band router.
Be illustrated in figure 2 the hardware digital module block diagram of base band router, this base band router comprises fpga chip, CPU, power supply POWER, two light mouth OP1 that connect respectively from near-end repeater and OP2, two TLK1501(serializer/de-serializers), a TLK4015(serializer/de-serializers), four light mouth OP1 ', OP2 ', OP3 ' and OP4 ' that are connected respectively with different far-end mulch-laying machines.Taking the transmission direction of base band router downstream signal as example, the serial/parallel conversion that OP1 and OP2 realize signal by TLK1501 sends signal to fpga chip, fpga chip is realized the parallel/serial conversion of signal by TLK4015 as requested after the merging of signal or deconsolidation process, and transmits a signal to respectively light mouth OP1 ', OP2 ', OP3 ' and OP4 '; POWER provides power supply for base band router, and CPU is connected with fpga chip, and its function is that base band router is monitored and controlled.In system of the present invention, CPU and fpga chip are packaged into a module in addition, are called baseband processing unit.
Describe the course of work of base band router below in detail.First it should be noted that the respectively corresponding light/electric modular converter of each light mouth in base band router, the function of this light/electric modular converter is to carry out the conversion of light/electricity, and the light signal that is about to receive from optical fiber is converted to the signal of telecommunication or converts electrical signals to light signal.
The downgoing baseband transmitting procedure of base band router, first be that the signal that receives respectively the different systems in connected each near-end repeater by two light/electric modular converter (is specifically included as GSM downstream signal here, TD-A downstream signal, TD-F downstream signal and WLAN signal), carry out the conversion of light/electricity, serial/parallel processing, then signal is delivered to the fpga chip in baseband processing unit, in fpga chip, there is predefined program, according to this program operation rule, the multiple signals of these different systems are merged, by GSM downstream signal, TD-A downstream signal, TD-F downstream signal and WLAN signal merge, again the signal after merging is carried out sending to respectively in four light/electric modular converter after parallel/serial processing, carry out signal by this four light/electric modular converter again and send to the far-end mulch-laying machine being connected respectively with it, finally complete the downgoing baseband transmission of base band router, as shown in Figure 3.In fact, fpga chip also needed first to carry out the process of a fractionation before carrying out multiple signals merging, GSM downstream signal and WLAN signal are split, or to TD-A downstream signal, TD-F downstream signal and WLAN signal split, the signal of the each independent standard after then just these being split carries out a total merging, because the signal receiving from each near-end repeater is before this not the signal of independent standard, a but signal merging among a small circle, so just need first signal to be split among a small circle, carrying out total signal merges again.
The uplink baseband transmitting procedure of base band router, by with four light/electric modular converter of far-end mulch-laying machine communication in one or more (according to how many decisions of cascade far-end mulch-laying machine link) receive signal, carry out the conversion of light/electricity, parallel/serial processing, then signal is sent into the fpga chip in baseband processing unit, first fpga chip can carry out deconsolidation process to the signal of different systems according to predefined program, GSM upward signal, TD-A upward signal, TD-F upward signal and WLAN signal split, then GSM upward signal and WLAN signal are merged to some light/electric modular converter of delivering to the communication of near-end repeater, TD-A upward signal, TD-F upward signal and WLAN signal merge light/electric modular converter of delivering to another near-end repeater communication, the uplink baseband transmitting procedure of base band router finishes, as shown in Figure 4.
As a good embodiment, base band router of the present invention has four light mouths that are connected with far-end mulch-laying machine, corresponding four light/electric modular converters, the signal of these four light/electric modular converter transmission is all the same, therefore a base band router can draw four far-end mulch-laying machines, can realize star-like networking, daisy chain networking, mixed networking and the ring-shaped network etc. of multimode digital radio frequency remote, bring great flexibility to the networking of multimode digital radio frequency remote.
In system of the present invention, in base band router, have this module of baseband processing unit, GSM repeater, TD repeater and far-end mulch-laying machine also include baseband processing unit, the function of this baseband processing unit is carry out the fractionation of signal, merging and respectively residing equipment separately monitored and controlled the processing that therefore each near-end repeater and far-end mulch-laying machine also all can split signal, merge.
The course of work of near-end repeater is: down direction, each near-end repeater of different systems receives the signal of the corresponding standard of respective base station transmission, as the GSM signal for the transmission of GSM base station that repeater receives herein, the TD signal for TD-RRU transmission that another repeater receives, then in near-end repeater separately, GSM signal and WLAN signal are merged, or TD signal and WLAN signal are merged, then the signal after merging is sent to respectively to base band router; Up direction, WLAN signal in each near-end repeater reception base band router of different systems and the signal of described corresponding standard, receive WLAN signal and GSM signal as being respectively GSM repeater here, or for TD repeater receives WLAN signal and TD signal, carry out, after deconsolidation process, the signal of this corresponding standard is sent to corresponding base station, send to by GSM signal in the base station of GSM, TD signal is sent in TD-RRU, and WLAN signal directly carries out the transmission of wireless signal in each repeater.
The course of work of far-end mulch-laying machine is: down direction, far-end mulch-laying machine receives the combined signal (GSM+TD-A+TD-F+WLAN) in base band router, carry out becoming independent GSM signal, TD-A signal, TD-F signal or WLAN signal after deconsolidation process, then respectively these independent signals are carried out to far-end covering (sending to user); Up direction, far-end mulch-laying machine receives signal and the WLAN signal from aerial each corresponding standard, after merging processing, send to described base band router, the signal of corresponding standard refers to GSM signal or TD signal (comprising TD-A signal and TD-F signal) here.
Describe the specific works principle of whole multimode digital RF system below in detail.As shown in Figure 5, GSM relaying terminal is by forming with lower module: relay duplexer 100, down conversion module 101, A/D converter 102, Digital Down Convert path 10 3, baseband processing unit 104, Digital Up Convert passage 113, D/A converter 112, up-converter module 111, light/electric modular converter 105, light/electric modular converter 106; Wherein 100,101,102,103 and 104 connect successively, and 104,113,112,111 and 100 connect successively, and 104 are also connected with 105 and 106 respectively, and 100 by direct-coupling device and base station communication, and 106 are connected with base band router by optical fiber.
In addition, TD repeater is by forming with lower module: relay duplexer 200, circulator 201, down conversion module 202, A/D converter 203, Digital Down Convert passage 204, baseband processing unit 205, Digital Up Convert passage 213, D/A converter 212, up-converter module 211, light/electric modular converter 206, circulator 221, down conversion module 222, A/D converter 223, Digital Down Convert passage 224, Digital Up Convert passage 233, D/A converter 232, up-converter module 231, light/electric modular converter 207; 201,202,203,204,205,213,212 and 211 connect into successively ring from beginning to end, 221,222,223,224,205,233,232,231 connect into successively ring from beginning to end, 200 are connected with 201 and 221 respectively, 200 also by direct-coupling device and TD-RRU communication, 205 are also connected with 206 and 207 respectively, and 206 are connected with base band router by optical fiber.
Far-end mulch-laying machine is by forming with lower module: light/electric modular converter 401, light/electric modular converter 402, light/electric modular converter 403, baseband processing unit 404, duplexer 405, Digital Up Convert passage 411, D/A converter 414, up-converter module 415, downlink power amplifier 416, circulator 417, Digital Down Convert passage 421, A/D converter 422, down conversion module 423, up LNA module 424, Digital Up Convert passage 431, D/A converter 434, up-converter module 435, downlink power amplifier 436, circulator 437, Digital Down Convert passage 441, A/D converter 442, down conversion module 443, up LNA module 444, Digital Up Convert passage 451, D/A converter 454, up-converter module 455, downlink power amplifier 456, Digital Down Convert passage 461, A/D converter 462, down conversion module 463, up LNA module 464, 404,411,414,415,416,417,424,423,422 and 421 connect into successively ring from beginning to end, 404,431,434,435,436,437,444,443,442 and 441 connect into successively ring from beginning to end, 404,451,454,455,456,405,464,463,462 and 461 connect into successively ring from beginning to end, 404 are also connected with 401,402 and 403 respectively, 402 by optical fiber and the communication of base band router, 405 are also connected with 417 and 437 respectively, and 405 cover or receive aerial signal by covering/reception antenna 406.
Describe whole GSM uplink process in detail below in conjunction with accompanying drawing 5.The GSM radiofrequency signal that covering/reception antenna 406 is received from air interface, reach duplexer 405, after other unwanted signals of duplexer filtering, obtain comparatively pure up radiofrequency signal, up radiofrequency signal is after up LNA module 464, 40dB is amplified in the large appointment of amplitude, pass through again down conversion module 463, up radiofrequency signal will be downconverted to analog if signal, analog if signal is after A/D converter 462, become digital signal, after Digital Down Convert passage 461, become baseband signal, enter again baseband processing unit 404, in baseband processing unit, fpga chip is processed signal, according to certain agreement (as CPRI agreement) by signal framing, signal after signal and the up framing of TD-A after framing, signal after the up framing of TD-F, WLAN signal merges, signal after merging is reached light/electric modular converter 402, in light/electric modular converter, signal is converted to light signal from the signal of telecommunication, in optical fiber, transmit, signal is the light/electric modular converter 304 to base band router through Optical Fiber Transmission, carry out the conversion of light/electricity through light/electric modular converter, light signal is converted to the signal of telecommunication, through baseband processing unit 303, fpga chip splits to merge to signal and processes, GSM upward signal, TD-A upward signal, TD-F upward signal and WLAN signal split and come, GSM upward signal and the merging of WLAN signal are delivered to light/electric modular converter 301, in light/electric modular converter, signal is converted to light signal from the signal of telecommunication, in optical fiber, transmit, signal is the light/electric modular converter 106 to GSM relaying terminal through Optical Fiber Transmission, by light/electric modular converter, light signal is converted to the signal of telecommunication, then by baseband processing unit 104, fpga chip carries out deconsolidation process to signal, GSM upward signal and the shunt of WLAN signal, GSM signal solution frame, by Digital Up Convert passage 113, baseband signal is become to digital intermediate frequency signal, be transformed to analog if signal by D/A converter 112, be transformed to radiofrequency signal by up-converter module 111, after relay duplexer 100, reach base station.
GSM is descending is by suitable coupling base station signal out, and the signal being coupled out will have individual suitably scope, will can not make again coupled signal too large by guarantee equipment release power.The signal that base station is coupled out is by relay duplexer 100, ensure pure downstream signal, by down conversion module 101, downlink radio-frequency signal will be downconverted to analog if signal, analog if signal is through A/D converter 102, become digital signal, after Digital Down Convert path 10 3, become baseband signal, enter again baseband processing unit 104, 104 li of baseband processing units, fpga chip is processed signal, according to certain agreement (as CPRI agreement) by signal framing, signal and WLAN signal after framing merge, signal after merging is reached light/electric modular converter 106, in light/electric modular converter, signal is converted to light signal from the signal of telecommunication, in optical fiber, transmit, signal is the light/electric modular converter 301 to base band router through Optical Fiber Transmission, carry out the conversion of light/electricity, light signal is converted to the signal of telecommunication, then pass through baseband processing unit 303, fpga chip splits to merge to signal and processes, GSM downstream signal and WLAN signal are split to the laggard row that comes to be reconsolidated, GSM downstream signal, TD-A downstream signal, TD-F downstream signal and WLAN signal are delivered to the light/electric modular converter 304 of base band router after merging, by light/electric modular converter, the signal of telecommunication is converted to light signal, in optical fiber, transmit, signal process Optical Fiber Transmission is to far-end mulch-laying machine light/electric modular converter 402, light signal is converted to the signal of telecommunication, through baseband processing unit 404, fpga chip is processed signal, by GSM downstream signal, TD-A downstream signal, TD-F downstream signal and WLAN signal carry out shunt to be processed, GSM downstream signal solution frame, by Digital Up Convert passage 451, baseband signal up-converts to digital intermediate frequency signal, be transformed to analog if signal by D/A converter 454, by up-converter module 455, analog if signal up-converts to radiofrequency signal, after power amplifier 456 amplifying signals, cover by reaching covering/reception antenna 406 after duplexer 405.
TD-A uplink receiving antenna is received TD-A radiofrequency signal from air interface, reach duplexer 405, after other unwanted signals of duplexer filtering, obtain comparatively pure up radiofrequency signal, up radiofrequency signal is through circulator 417, up LNA module 424, 30dB is amplified in the large appointment of LNA module, pass through again down conversion module 423, up radiofrequency signal will be downconverted to analog if signal, analog if signal is through A/D converter 422, become digital signal, after Digital Down Convert passage 421, become baseband signal, enter again baseband processing unit 404, in baseband processing unit, fpga chip is processed signal, signal will be by according to certain agreement (as CPRI agreement) framing, signal after signal and the up framing of GSM after framing, signal after the up framing of TD-F, WLAN signal merges, signal after merging is reached light/electric modular converter 402, in light/electric modular converter, signal is converted to light signal from the signal of telecommunication, in optical fiber, transmit, signal is the light/electric modular converter 304 to base band router through Optical Fiber Transmission, carry out the conversion of light/electricity by light/electric modular converter, light signal is converted to the signal of telecommunication, through baseband processing unit 303, fpga chip splits signal to merge and processes, by GSM upward signal, TD-A upward signal, TD-F upward signal and WLAN signal split and come, then TD-A upward signal, TD-F upward signal and WLAN signal are delivered to the light/electric modular converter 302 of base band router through light/electric modular converter after merging, signal is converted to light signal from the signal of telecommunication, in optical fiber, transmit, signal through Optical Fiber Transmission to TD relaying terminal light/electric modular converter 206, light signal is converted to the signal of telecommunication, through baseband processing unit 205, fpga chip in baseband processing unit 205 carries out deconsolidation process to signal, TD-A upward signal, TD-F upward signal and WLAN signal are along separate routes, then TD-A signal solution frame, by Digital Up Convert passage 213, baseband signal up-converts to digital intermediate frequency signal, through D/A converter 212 and up-converter module 211, signal up-converts to radiofrequency signal, after circulator 201 and relay duplexer 200, reach TD-RRU.
TD-A is descending is by suitable coupling TD-RRU signal out, and the signal being coupled out will have individual suitably scope, will can not make again coupled signal too large by guarantee equipment release power.The signal that TD-RRU is coupled out is by relay duplexer 200, ensure pure downstream signal, by circulator 201 and down conversion module 202, downlink radio-frequency signal will be downconverted to analog if signal, analog if signal is after A/D converter 203, become digital signal, after Digital Down Convert passage 204, become baseband signal, enter again baseband processing unit 205, in baseband processing unit, fpga chip is processed signal, according to certain agreement (as CPRI agreement) by signal framing, downstream signal and WLAN signal after signal and TD-F framing after framing merge, signal after merging is reached light/electric modular converter 206, in light/electric modular converter, signal is converted to light signal from the signal of telecommunication, in optical fiber, transmit, signal is the light/electric modular converter 302 to base band router through Optical Fiber Transmission, carry out the conversion of light/electricity, light signal is converted to the signal of telecommunication, carry out Base-Band Processing through baseband processing unit 303, fpga chip splits to merge to signal and processes, TD-A downstream signal, TD-F downstream signal and WLAN signal split the laggard row that comes and reconsolidate, GSM downstream signal, TD-A downstream signal, TD-F downstream signal and WLAN signal merge light/electric modular converter 304 of delivering to base band router, through light/electric modular converter, signal is converted to light signal from the signal of telecommunication, in optical fiber, transmit, signal is the light/electric modular converter 402 to far-end mulch-laying machine through Optical Fiber Transmission, light signal is converted to the signal of telecommunication, carry out Base-Band Processing by baseband processing unit 404, fpga chip in baseband processing unit 404 carries out deconsolidation process to signal, by GSM downstream signal, TD-A downstream signal, TD-F downstream signal and WLAN signal carry out shunt to be processed, TD-A downstream signal solution frame, be transformed to digital intermediate frequency signal by Digital Up Convert passage 411, be transformed to analog if signal by D/A converter 414, up-convert to radiofrequency signal through up-converter module 415, after downlink power amplifier 416 and circulator 417, amplifying signal reaches covering/reception antenna 406 after by duplexer 405 and covers.
The uplink and downlink transmitting procedure of TD-F is the same with TD-A frequency range, repeats no more here.
WLAN only provides a baseband transmission link, carries out a transparent transmission of WLAN.As follows to transmitting procedure far-end mulch-laying machine from GSM repeater: GSM near-end, WLAN light signal is by light/electric modular converter 105, light signal is converted to the signal of telecommunication, carry out Base-Band Processing by baseband processing unit 104, fpga chip in baseband processing unit 104 is processed signal, according to certain agreement (as CPRI agreement) by signal framing, downstream signal after signal and GSM framing after framing merges, signal after merging is reached light/electric modular converter 106, in light/electric modular converter, signal is converted to light signal from the signal of telecommunication, in optical fiber, transmit, signal is the light/electric modular converter 301 to base band router through Optical Fiber Transmission, carry out the conversion of light/electricity, light signal is converted to the signal of telecommunication, carry out Base-Band Processing through baseband processing unit 303, fpga chip splits to merge to signal and processes, GSM downstream signal and WLAN signal are split to the laggard row that comes to be reconsolidated, GSM downstream signal, TD-A downstream signal, TD-F downstream signal and WLAN signal merge light/electric modular converter 304 of delivering to base band router, through light/electric modular converter, signal is converted to light signal from the signal of telecommunication, in optical fiber, transmit, signal is the light/electric modular converter 402 to far-end mulch-laying machine through Optical Fiber Transmission, light signal is converted to the signal of telecommunication, by baseband processing unit 404, fpga chip carries out Base-Band Processing to signal, by GSM downstream signal, TD-A downstream signal, TD-F downstream signal and WLAN signal carry out shunt to be processed, the base band data of WLAN is delivered to light/electric modular converter 403 to be processed.
WLAN signal is as follows to transmitting procedure GSM near-end repeater from far-end mulch-laying machine: WLAN light signal is by light/electric modular converter 403, light signal is converted to the signal of telecommunication, by baseband processing unit 404, in baseband processing unit, fpga chip carries out Base-Band Processing to signal, signal will be by according to certain agreement (as CPRI agreement) framing, signal after signal and the up framing of TD-A after framing, signal after the up framing of TD-F, signal after the up framing of GSM merges, signal after merging is reached light/electric modular converter 402, in light/electric modular converter, signal is converted to light signal from the signal of telecommunication, in optical fiber, transmit, signal is the light/electric modular converter 304 to base band router through Optical Fiber Transmission, carry out the conversion of light/electricity through light/electric modular converter, light signal is converted to the signal of telecommunication, through baseband processing unit 303, fpga chip splits to merge to signal and processes, GSM upward signal, TD-A upward signal, TD-F upward signal and WLAN signal split and come, GSM upward signal and the merging of WLAN signal are delivered to light/electric modular converter 301, in light/electric modular converter, signal is converted to light signal from the signal of telecommunication, in optical fiber, transmit, signal is the light/electric modular converter 106 to GSM relaying terminal through Optical Fiber Transmission, by light/electric modular converter, light signal is converted to the signal of telecommunication, then by baseband processing unit 104, fpga chip carries out deconsolidation process to signal, GSM upward signal and the shunt of WLAN signal, the base band data of WLAN is delivered to light/electric modular converter 105 to be processed.
The transmission of WLAN from TD near-end repeater to far-end mulch-laying machine is identical with GSM to the transmission of TD near-end repeater with far-end mulch-laying machine, repeats no more here.The transmission bandwidth of WLAN can dynamic assignment, in the time that the carrier number of the GSM in fact using is few or TD carrier number is few, can dynamically resource be distributed to WLAN, makes WLAN have larger transmission bandwidth.
Because WLAN function system only provides a transparent baseband transmission, not fixing downlink data will transmit to far-end mulch-laying machine from near-end repeater, transmit and be also fine from far-end mulch-laying machine to near-end repeater, like this by after base band router, WLAN can realize the transmission that all far-ends arrive all far-ends to transmission and all near-ends of all near-ends, has greatly improved the scope of WLAN baseband transmission in multimode digital radio frequency remote.
When being combined, the radio frequency stretch system of different systems also to solve the problem of clock synchronous.Clock synchronous scheme provided by the present invention is as follows: whole system only has a clock, sets clock taking GSM relaying terminal here as reference clock, and other equipment in whole system and GSM relaying terminal carry out clock synchronous.Base band router, by OP1 light/electric modular converter, adopts clock Recovery, realizes the laggard row clock of Clock Extraction synchronous.
Multimode digital radio frequency remote of the present invention, because signal accords with distinguishing by flag of frame after framing, therefore in the case of keeping independence separately, the uplink and downlink of multi-signal can transmit in same optical fiber, so this system can only realize transmission multi-signal with a pair of light/electric modular converter, an optical fiber.As a preferred embodiment, select the light/electric modular converter with wavelength division multiplexing function can realize better this function.Light/electric the modular converter with wavelength division multiplexing function can be used the recovery of two kinds of different wave lengths of sending and receiving to an optical fiber, like this, between near-end repeater and base band router, base band router and far-end mulch-laying machine, all only need an optical fiber to connect, greatly saved fiber resource.
Multimode digital radio frequency remote disclosed by the invention, closes road by base band router to the signal of multiple types and processes, and the signal of multiple types can be transmitted in an optical fiber, covers thereby realize far-end.This function of base band router has determined that it is not only only applicable to TD+GSM+WLAN multimode digital radio frequency remote, can be applied in equally in the multimode digital radio frequency remote of other standards, as WCDMA+GSM+WLAN multimode digital radio frequency remote, WCDMA+DCS1800+WLAN multimode digital radio frequency remote, TD+DCS1800+WLAN multimode digital radio frequency remote etc.
Embodiment bis-
As a preferred embodiment, far-end mulch-laying machine can also comprise CFR(Crest FactorReduction, crest factor dwindles) module, DPD(Digital Pre-Distortion, digital pre-distortion) module, feedback down-conversion module and feedback A/D converter, CFR module is connected with Digital Up Convert passage and DPD module respectively, DPD module is also connected with D/A converter, feedback down-conversion module is connected with downlink power amplifier and feedback A/D converter respectively, feedback A/D converter is also connected with DPD module, as shown in Figure 6.
Taking GSM passage as example, when baseband signal up-converts to after digital intermediate frequency signal by Digital Up Convert passage 451, first adopt the peak technology that disappears to the signal peak processing that disappears by CFR module 452, then DPD module 453 receives the signal sending in CFR and adopts DPD technology to be further processed, signal after treatment is sent in D/A converter, at this moment corresponding DPD module also need to be at a signal of downlink power amplifier 456 output couplings, be that feedback down-conversion module 457 receives the signal in downlink power amplifier 456, through being transformed to analog if signal, and be sent to feedback A/D converter 458, intermediate-freuqncy signal is transformed into digital signal by feedback A/D converter, sends to DPD module 453 and carry out DPD algorithm process with forward signal.
TD-A passage and TD-F passage and GSM channel types seemingly, repeat no more here.CFR technology and DPD technology are applied to multimode digital radio frequency remote, can reduce signal peak-to-average ratio, improve the signal linearity and overall efficiency, what make that complete machine structure can do is smaller and more exquisite, light.
By above two embodiment, solve in prior art the relay in multimode digital radio frequency remote not in same place, and between two places, there is no in situation that fiber resource connects the problem that the application of multimode digital radio frequency remote is restricted.Multimode digital radio frequency remote of the present invention, near-end repeater separates, and owing to having used base band router, improve the application limitation of multimode digital radio frequency remote, realize the flexible networking of multimode digital radio frequency remote, the multi-modulation scheme that has ensured far-end covers, and has saved a large amount of fiber resources, in application, has prospect widely.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection range of the present invention.
Claims (8)
1. a multimode digital radio frequency remote, comprises at least one far-end mulch-laying machine and multiple near-end repeater, it is characterized in that, also comprises base band router; Described far-end mulch-laying machine is connected with described base band router, and described base band router is also connected with described each near-end repeater respectively;
Described base band router, for receiving the signal of described multiple near-end repeater different systems, merges processing, and the signal after merging is sent to described far-end mulch-laying machine; And receive the signal in described far-end mulch-laying machine, carry out deconsolidation process, and the signal after splitting is sent to respectively to each near-end repeater of corresponding standard;
Described near-end repeater is used for the signal of the corresponding standard that receives different base station transmission, after merging, sends to described base band router with WLAN signal; And receive WLAN signal in described base band router and the signal of described corresponding standard, carry out, after deconsolidation process, the signal of described corresponding standard is sent to corresponding base station.
2. multimode digital radio frequency remote according to claim 1, is characterized in that, described far-end mulch-laying machine, for receiving the combined signal of described base band router, carries out carrying out far-end covering after deconsolidation process; And receive signal and the WLAN signal of each corresponding standard, merge after processing and send to described base band router.
3. multimode digital radio frequency remote according to claim 1, it is characterized in that, described far-end mulch-laying machine comprises CFR module, described CFR module is used for the signal of the Digital Up Convert passage that receives described far-end mulch-laying machine, adopts crest factor to dwindle after CFR technology is processed signal is sent.
4. multimode digital radio frequency remote according to claim 3, it is characterized in that, described far-end mulch-laying machine also comprises DPD module, described DPD module is for receiving the signal of described CFR, signal sent to the D/A converter of described far-end mulch-laying machine after adopting digital pre-distortion DPD technology to process.
5. multimode digital radio frequency remote according to claim 4, it is characterized in that, described far-end mulch-laying machine also comprises feedback down-conversion module and feedback A/D converter, described feedback down-conversion module receives the signal in downlink power amplifier, through being transformed to analog if signal, and be sent to described feedback A/D converter; Described analog if signal is transformed into digital signal by described feedback A/D converter, sends to described DPD module and forward signal and carry out DPD algorithm process.
6. according to the multimode digital radio frequency remote described in claim 1-5 any one, it is characterized in that, in described base band router, each light mouth draws a near-end repeater or far-end mulch-laying machine, and the networking mode of realization comprises: Star network, chrysanthemum link network, ring-like net or hybrid network.
7. multimode digital radio frequency remote according to claim 6, it is characterized in that, corresponding light/electric the modular converter of described each light mouth, described light/electric modular converter is for the conversion of light/electricity, also for the recovery of two kinds of different wave lengths is used to an optical fiber.
8. multimode digital radio frequency remote according to claim 2, it is characterized in that, the standard of the applicable multimode digital radio frequency remote of described base band router comprises: TD+GSM+WLAN, WCDMA+GSM+WLAN, WCDMA+DCS1800+WLAN, TD+DCS1800+WLAN.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110000703.0A CN102291725B (en) | 2011-01-04 | 2011-01-04 | Multimode digital radio frequency remote system |
| PCT/CN2011/084259 WO2012092810A1 (en) | 2011-01-04 | 2011-12-20 | Multimode digital radio-frequency remote system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110000703.0A CN102291725B (en) | 2011-01-04 | 2011-01-04 | Multimode digital radio frequency remote system |
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| CN102291725A CN102291725A (en) | 2011-12-21 |
| CN102291725B true CN102291725B (en) | 2014-09-10 |
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| CN201110000703.0A Expired - Fee Related CN102291725B (en) | 2011-01-04 | 2011-01-04 | Multimode digital radio frequency remote system |
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| WO (1) | WO2012092810A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105281840B (en) * | 2015-07-13 | 2018-09-04 | 广州杰赛科技股份有限公司 | Realize the wireless communication system and method for more net unifications |
| CN105245280B (en) * | 2015-07-13 | 2018-11-06 | 广州杰赛科技股份有限公司 | Realize the optical fiber distribution system and method for more net unifications |
| CN105141368B (en) * | 2015-07-13 | 2018-11-06 | 广州杰赛科技股份有限公司 | Support the optical fiber distribution system and method for multi-communication standard access |
| CN105491689A (en) * | 2015-11-24 | 2016-04-13 | 京信通信技术(广州)有限公司 | Public transmission extension system and device |
| CN107360142B (en) * | 2017-06-26 | 2019-10-08 | 京信通信系统（中国）有限公司 | Multi-standard mixed networking Transmission system and transmission method based on CPRI framework |
| CN107634800A (en) * | 2017-08-24 | 2018-01-26 | 广东埃信信息技术有限公司 | A kind of digital high-frequency amplification station |
| CN108053636A (en) * | 2017-12-31 | 2018-05-18 | 东莞留云榭软件科技有限公司 | A kind of distant signal transmission system |
| CN109462562B (en) * | 2018-11-02 | 2021-10-12 | 三维通信股份有限公司 | Digital pre-distortion processing method applied to multi-mode RRU |
| CN110350976A (en) * | 2019-07-10 | 2019-10-18 | 深圳市思科泰技术股份有限公司 | A kind of WJB-I type GSM-R digital optical fiber direct station |
| CN112653638B (en) * | 2020-12-14 | 2023-03-24 | 中科南京移动通信与计算创新研究院 | Device for switching routes of multiple paths of intermediate frequencies and baseband at high speed and communication method thereof |
| CN113938140A (en) * | 2021-09-30 | 2022-01-14 | 京信网络系统股份有限公司 | Remote transmission covering method, system and remote unit |
| CN113938145B (en) * | 2021-11-11 | 2022-09-23 | 中国联合网络通信集团有限公司 | Signal transmission system and method |
| CN115278703B (en) * | 2022-07-28 | 2023-06-30 | 西安电子科技大学 | Concealed reconfigurable satellite measurement, operation and control network device and deployment method |
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| CN102291725A (en) | 2011-12-21 |
| WO2012092810A1 (en) | 2012-07-12 |
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Address after: 510663 Shenzhou Road 10, Science City, Guangdong, Guangzhou Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 Shenzhou Road 10, Science City, Guangdong, Guangzhou Patentee before: COMBA TELECOM SYSTEMS (CHINA) Ltd. |
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