CN103079216A - Multi-network fusion access indoor signal coverage system - Google Patents
Multi-network fusion access indoor signal coverage system Download PDFInfo
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- CN103079216A CN103079216A CN2013100160881A CN201310016088A CN103079216A CN 103079216 A CN103079216 A CN 103079216A CN 2013100160881 A CN2013100160881 A CN 2013100160881A CN 201310016088 A CN201310016088 A CN 201310016088A CN 103079216 A CN103079216 A CN 103079216A
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Abstract
The invention discloses a multi-network fusion access indoor signal coverage system. The system comprises a network cable and a near-end machine used for connecting a base station, wherein the near-end machine is connected with at least one extension unit; the extension unit is connected with at least one coverage slave machine; the extension unit is connected with the coverage slave machine in a communication way through the network cable; and the coverage slave machine is connected with an antenna. By the multi-network fusion access indoor signal coverage system, various signals can cover indoor at the same time, so that not only is the number of network access equipment indoor reduced, but also the laying complexity and the construction difficulty of transmission lines are reduced; and moreover, the problem that far-end equipment is difficultly powered can also be solved. In addition, the system provided by the invention has extremely high stability and reliability; and moreover, the anti-jamming capability is high. The multi-network fusion access indoor signal coverage system provided by the invention is widely applied to the field of communication.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of many nets and merge the indoor signal cover system of access.
Background technology
Technical interpretation:
CPRI: common public radio interface
PoE: active Ethernet
Along with improving constantly of people's quality of life level, people are also more and more higher to the requirement of the communication technology, and are particularly outstanding aspect indoor coverage of signal especially.Because what base station signal covered use is that wireless signal covers; and according to the characteristic of wireless signal as can be known; base station signal covers usually can make and is in the building that base station signal covers fringe region; even make some place (such as megastore, underground parking etc.) in the signal hot spot region signal blind spot occur; thereby cause people not carry out proper communication in above-mentioned place; therefore in order to solve the above problems, the indoor coverage of signal of communication network arises at the historic moment.
Now, the scheme of indoor coverage of signal mainly is to adopt multiple transmission means to mix the scheme of using, for example adopt cable to add wireless or optical fiber adds wireless scheme, and then the multi-signals such as transmission GSM, TD-SCDMA, WCDMA, and adopt category-5 cable and then transmission broadband signal.But for traditional indoor coverage of signal scheme, when if the user need to use the signal of the different systems such as GSM, TD-SCDMA, broadband simultaneously, then need to possess simultaneously corresponding access device, and the zone that requires the user place has corresponding transmission line, can cause like this kind of access device and quantity too much, waste placing space and the cost of investment that increases equipment, but also can cause increasing of transmission line, thus greatly increased the construction difficulty of communication network.
Summary of the invention
In order to solve the problems of the technologies described above, the purpose of this invention is to provide a kind of simple in structure and be easy to realize that the many nets that operate merge the indoor signal cover system of access.
The technical solution adopted in the present invention is: a kind of many nets merge the indoor signal cover system of access, the near-end machine that this system comprises netting twine and is used for being connected with the base station, described near-end machine is connected with at least one expanding element, described expanding element is connected with at least one and covers slave, and described expanding element carries out communication by netting twine between the slave and is connected with covering, and described covering slave is connected with antenna.
Further, the first signal processing module that described expanding element comprises supply module and is connected with near-end machine, described first signal processing module is connected with the first gigabit Ethernet chip and the first Ethernet interface in turn, and described the first Ethernet interface also is connected with supply module;
Described covering slave comprises the second Ethernet interface, the secondary signal processing module that described the second Ethernet interface is connected with the second gigabit Ethernet chip in turn and is connected with antenna, and described the second Ethernet interface also is connected with and is subjected to electric module;
Described first signal processing module communicates by the first gigabit Ethernet chip, the first Ethernet interface, netting twine, the second Ethernet interface and the second gigabit Ethernet chip and then with the secondary signal processing module successively and is connected.
Further, described first signal processing module comprises the 2nd CPRI frame processing module that is connected with near-end machine and the first ethernet frame processing module that is used for according to the basic agreement of gigabit ethernet signal transmission the signal that receives being carried out framing solution frame, described the first ethernet frame processing module is connected with the first gigabit Ethernet chip, the first output of described the 2nd CPRI frame processing module is connected with the second comb shape in turn and extracts interpolation filter, the first digital up converter and the first buffer, the output of described the first buffer is connected with the first input end of the first ethernet frame processing module;
The first output of described the first ethernet frame processing module is connected with the 4th buffer, the 3rd digital down converter and the 3rd comb shape in turn and extracts interpolation filter, and the output that described the 3rd comb shape extracts interpolation filter is connected with the first input end of the 2nd CPRI frame processing module;
The second output of described the 2nd CPRI frame processing module is connected with the 5th buffer, and the output of described the 5th buffer is connected with the second input of the first ethernet frame processing module;
The second output of described the first ethernet frame processing module is connected with the 8th buffer, and the output of described the 8th buffer is connected with the second input of the 2nd CPRI frame processing module;
Described the 2nd CPRI frame processing module also is connected with Ethernet switch and the tenth buffer in turn, and described the tenth buffer is connected with the first ethernet frame processing module.
Further, described secondary signal processing module comprises the 3rd analog down converter, the 4th analog down converter and the second ethernet frame processing module that is used for according to the basic agreement of gigabit ethernet signal transmission the signal that receives being carried out framing solution frame, described the second ethernet frame processing module is connected with the second gigabit Ethernet chip, the first output of described the second ethernet frame processing module is connected with the second buffer in turn, the first finite impulse response filter, the second digital up converter, the first digital to analog converter and the 3rd simulation upconverter, the output of described the 3rd simulation upconverter is connected with the input of antenna;
The input of described the 3rd analog down converter is connected with the output of antenna, the output of described the 3rd analog down converter is connected with the second analog to digital converter, the second digital down converter, the second finite impulse response filter and the 3rd buffer in turn, and the output of described the 3rd buffer is connected with the first input end of the second ethernet frame processing module;
The second output of described the second ethernet frame processing module is connected with hex buffer, the 4th finite impulse response filter, the 4th digital up converter, the 3rd digital to analog converter and the 4th simulation upconverter in turn, and the output of described the 4th simulation upconverter is connected with the input of antenna;
The input of described the 4th analog down converter is connected with the output of antenna, the output of described the 4th analog down converter is connected with the 4th analog to digital converter, the 5th digital down converter, the 5th finite impulse response filter and the 7th buffer in turn, and the output of described the 7th buffer is connected with the second input of the second ethernet frame processing module;
Described the second ethernet frame processing module also is connected with the 11 buffer and 100 m ethernet chip in turn.
Further, described near-end machine comprises the first analog down converter, the second analog down converter, the 9th buffer and a CPRI frame processing module that is connected with the first signal processing module, the output of described the first analog down converter is connected with the first analog to digital converter, the first digital down converter and the first comb shape in turn and extracts interpolation filter, and the output that described the first comb shape extracts interpolation filter is connected with the first input end of a CPRI frame processing module;
The first output of a described CPRI frame processing module is connected with the 4th comb shape in turn and extracts interpolation filter, the 3rd digital up converter, the second digital to analog converter and the first simulation upconverter;
The output of described the second analog down converter is connected with the 3rd analog to digital converter, the 4th digital down converter and the 3rd finite impulse response filter in turn, and the output of described the 3rd finite impulse response filter is connected with the second input of a CPRI frame processing module;
The second output of a described CPRI frame processing module is connected with the 6th finite impulse response filter, the 5th digital up converter, the 4th digital to analog converter and the second simulation upconverter in turn;
A described CPRI frame processing module is connected with the 9th buffer.
Further, when the basic agreement that described the first ethernet frame processing module is used for transmitting according to gigabit ethernet signal is carried out framing to the signal that receives, described the first ethernet frame processing module forms ethernet frame according to the basic agreement of gigabit ethernet signal transmission with the signal that receives, and the form of described ethernet frame is as follows:
X?=?[X
1、X
2、X
3、X
4]；
X
1?=[2G_I,2G_Q,3G_I,?2G_I,2G_Q,3G_Q]；
X
2?=[2G_I,2G_Q,3G_I,DATA_E,?2G_I,2G_Q,3G_Q,DATA_E]；
X
3=[2G_I,2G_Q,3G_I,DATA_C,?2G_I,2G_Q,3G_Q,DATA_C]；
X
4?=[0]；
Wherein, X represents an ethernet frame, X
1, X
2, X
3, X
4Be followed successively by respectively four parts of ethernet frame, 2G_I and 2G_Q are expressed as respectively the IQ two-way 2G signal of reception, and 3G_I and 3G_Q are expressed as respectively the IQ two-way 3G signal of reception, DATA_E is expressed as the 100 m ethernet signal of reception, and DATA_C is expressed as the system monitoring signal, in addition, and X
4Be expressed as the system protection gap.
Further, this system also comprises local switch, and described local switch is connected with described Ethernet switch.
Further, described netting twine adopts CAT5E UTP cable.
Further, described the first Ethernet interface and the second Ethernet interface have all adopted the Ethernet interface that contains the network transformer of supporting supply module.
The invention has the beneficial effects as follows: system of the present invention is by netting twine and then transmits simultaneously the signals such as GSM, TD-SCDMA, broadband, therefore the application of the invention, just can be implemented in the indoor various signals that cover simultaneously, so not only reduced indoor network access equipment quantity, but also reduced laying complexity and the difficulty of construction of transmission line, and reduce the equipment purchase cost.Also have, system of the present invention adopts remote power feeding, therefore can solve remote equipment power supply hard problem.In addition, system configuration of the present invention is simple to be realized with being easy to, and the transmission link of 2G signal, 3G signal and broadband signal does not respectively interact, and can carry out stable transfer to the continuous continual mobile communication signal of 2G, 3G and 100 m ethernet signal, therefore system of the present invention has high stability and reliability, and antijamming capability is strong.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
Fig. 1 is the structural representation that a kind of many nets of the present invention merge the indoor signal cover system of access;
Fig. 2 is the first specific embodiment structural representation that a kind of many nets of the present invention merge the indoor signal cover system of access;
Fig. 3 is the second specific embodiment structural representation that a kind of many nets of the present invention merge the indoor signal cover system of access.
The first Ethernet interface 1; Netting twine 2; The second Ethernet interface 3.
Embodiment
By illustrated in figures 1 and 2, a kind of many nets merge the indoor signal cover system of access, the near-end machine that this system comprises netting twine 2 and is used for being connected with the base station, described near-end machine is connected with at least one expanding element, described expanding element is connected with at least one and covers slave, and described expanding element carries out communication by netting twine 2 between the slave and is connected with covering, and described covering slave is connected with antenna.And described expanding element and cover between the slave by netting twine 2 and then carry out the transfer of data such as 2G, 3G, broadband.Described near-end machine communicates with the base station by cable and is connected, and described near-end machine communicates with expanding element by optical fiber and is connected.
According to above-mentioned system of the present invention, its operation principle is: described near-end machine is to the 2G by the base station coupled simulation, after the 3G signal carries out digital processing, with 2G, 3G signal and receive the WLAN signal and carry out framing and packing according to the CPRI agreement, and deliver on the expanding element by optical fiber transmission, and described expanding element is separated frame to the received signal according to the CPRI agreement, obtain corresponding 2G, 3G and WLAN signal, three's signal carries out framing according to the basic agreement of gigabit Ethernet transmission after by corresponding digital processing, and be sent to the covering slave by netting twine 2, at last, described covering slave is separated frame to the received signal according to the basic agreement of gigabit Ethernet transmission, and then obtain 2G, behind 3G and the 100 m ethernet signal, by realizing 2G after the corresponding processing, the covering of 3G signal and the function of surfing the Net of 100 m ethernet.
Got by above-mentioned, system of the present invention is by netting twine 2 and then transmits simultaneously the signals such as GSM, TD-SCDMA, broadband, therefore the application of the invention, just can be implemented in the indoor various signals that cover simultaneously, so not only reduced indoor network access equipment quantity, but also reduced laying complexity and the difficulty of construction of transmission line, and reduce the equipment purchase cost.
Be further used as preferred embodiment, the first signal processing module that described expanding element comprises supply module and is connected with near-end machine, described first signal processing module is connected with the first gigabit Ethernet chip and the first Ethernet interface 1 in turn, and described the first Ethernet interface 1 also is connected with supply module;
Described covering slave comprises the second Ethernet interface 3, the secondary signal processing module that described the second Ethernet interface 3 is connected with the second gigabit Ethernet chip in turn and is connected with antenna, and described the second Ethernet interface 3 also is connected with and is subjected to electric module;
Described first signal processing module communicates by the first gigabit Ethernet chip, the first Ethernet interface 1, netting twine 2, the second Ethernet interface 3 and the second gigabit Ethernet chip and then with the secondary signal processing module successively and is connected.Can get thus, carry out simultaneously data and power delivery by netting twine 2 between described expanding element and the covering slave.And described netting twine 2 adopts CAT5E UTP cable, system of the present invention has like this used 4 groups of 8 line full duplexs ground of CAT5E UTP cable to carry out data and power supply when transmitting simultaneously, compared to general transmission system, system of the present invention has higher efficient and power-carrying, and because system of the present invention adopts the power supply technique of PoE, therefore system of the present invention can make the user need not to utilize power supplied locally, greatly improve the convenience that the user uses operation, and the power supplied locally requirement of saving the user, saved user's Financial cost.
Get according to above-mentioned, because the present invention adopts the power supply technique of PoE, therefore in expanding element, have supply module, be subjected to electric module and in covering slave, have.And described supply module is to be provided-the 48V input power by the outside, and the other end that successfully detects netting twine 2 when described supply module is connected to when being subjected to electric module, and described supply module will provide the 48V power supply for covering slave.
For the PoE power supply technique in the system of the present invention, its concrete main process is as follows:
1, detects: at the beginning, described supply module is at the very little voltage of the first Ethernet interface 1 place output, and judge the other end of netting twine 2 according to the little electric current that feeds back to, i.e. the second Ethernet interface 2 places, whether be connected to the featured resistance that is subjected to electric module, thereby judging whether this terminal belongs to is subjected to electric module, is connected with an electric module that is subjected to of supporting the IEEE802.3af/at standard until supply module detects the other end of netting twine 2.
2, be subjected to electric module classification: when described supply module detect be subjected to electric module after, describedly be subjected to have on the electric module power to divide quasi-resistance, and different resistance values represents this and is subjected to electric module to need different power, therefore, described supply module can basis be classified by the classified information that fed back by electric module and then to being subjected to electric module to carry out power grade, and assesses the power loss grade that this is subjected to electric module.
3, begin power supply: described supply module begin from low tension to being subjected to electric module for power supply, and supply power voltage increases gradually until the DC power supply of 48V is provided after having carried out detection and being subjected to electric module classification.
4, power supply: described supply module is the covering slave stable 48V DC power supply is provided, thereby satisfy the power grade demand that is subjected to electric module for being subjected to electric module that stable 48V DC power supply is provided.
5, outage: when disconnected from network by electric module, when namely disconnecting netting twine 2, described supply module rapidly (generally within 300ms～400ms) stops as being subjected to electric module for power supply, and described supply module can the duplicate detection process and the terminal that detects netting twine 2 whether have to connect and be subjected to electric module.
Be further used as preferred embodiment, described supply module has adopted support-48V power supply input, has supported 4 tunnel outputs, every road to support the power supply chip of the highest 70W power output, and the model of this power supply chip is MAX5980.In addition, describedly be subjected to electric module to adopt compatible IEEE802.3af/at standard, transfer power greater than the electrical chip that is subjected to of 40W, and this model that is subjected to electrical chip is MAX5969B.And the 48V DC power supply that transmits and separated by the second Ethernet interface 3 from netting twine 2 converts the 12V DC power supply to through after being subjected to the processing of electric module, is used to cover slave the normal operation power supply is provided.
In addition, it is 88E1111 that described the first gigabit Ethernet chip and the second gigabit Ethernet chip all adopt model, can support the chip of 1000BASE-T, 100BASE-T and three kinds of ethernet standards of 10base-T.
Be further used as preferred embodiment, described the first Ethernet interface 1 and the second Ethernet interface 3 have all adopted the Ethernet interface that contains the network transformer of supporting supply module.
Be further used as preferred embodiment, described first signal processing module comprises the 2nd CPRI frame processing module that is connected with near-end machine and the first ethernet frame processing module that is used for according to the basic agreement of gigabit ethernet signal transmission the signal that receives being carried out framing solution frame, described the first ethernet frame processing module is connected with the first gigabit Ethernet chip, the first output of described the 2nd CPRI frame processing module is connected with the second comb shape in turn and extracts interpolation filter, the first digital up converter and the first buffer, the output of described the first buffer is connected with the first input end of the first ethernet frame processing module;
The first output of described the first ethernet frame processing module is connected with the 4th buffer, the 3rd digital down converter and the 3rd comb shape in turn and extracts interpolation filter, and the output that described the 3rd comb shape extracts interpolation filter is connected with the first input end of the 2nd CPRI frame processing module;
The second output of described the 2nd CPRI frame processing module is connected with the 5th buffer, and the output of described the 5th buffer is connected with the second input of the first ethernet frame processing module;
The second output of described the first ethernet frame processing module is connected with the 8th buffer, and the output of described the 8th buffer is connected with the second input of the 2nd CPRI frame processing module;
Described the 2nd CPRI frame processing module also is connected with Ethernet switch and the tenth buffer in turn, and described the tenth buffer is connected with the first ethernet frame processing module.
Be further used as preferred embodiment, described secondary signal processing module comprises the 3rd analog down converter, the 4th analog down converter and the second ethernet frame processing module that is used for according to the basic agreement of gigabit ethernet signal transmission the signal that receives being carried out framing solution frame, described the second ethernet frame processing module is connected with the second gigabit Ethernet chip, the first output of described the second ethernet frame processing module is connected with the second buffer in turn, the first finite impulse response filter, the second digital up converter, the first digital to analog converter and the 3rd simulation upconverter, the output of described the 3rd simulation upconverter is connected with the input of antenna;
The input of described the 3rd analog down converter is connected with the output of antenna, the output of described the 3rd analog down converter is connected with the second analog to digital converter, the second digital down converter, the second finite impulse response filter and the 3rd buffer in turn, and the output of described the 3rd buffer is connected with the first input end of the second ethernet frame processing module;
The second output of described the second ethernet frame processing module is connected with hex buffer, the 4th finite impulse response filter, the 4th digital up converter, the 3rd digital to analog converter and the 4th simulation upconverter in turn, and the output of described the 4th simulation upconverter is connected with the input of antenna;
The input of described the 4th analog down converter is connected with the output of antenna, the output of described the 4th analog down converter is connected with the 4th analog to digital converter, the 5th digital down converter, the 5th finite impulse response filter and the 7th buffer in turn, and the output of described the 7th buffer is connected with the second input of the second ethernet frame processing module;
Described the second ethernet frame processing module also is connected with the 11 buffer and 100 m ethernet chip in turn.
Be further used as preferred embodiment, described near-end machine comprises the first analog down converter, the second analog down converter, the 9th buffer and a CPRI frame processing module that is connected with the first signal processing module, the output of described the first analog down converter is connected with the first analog to digital converter, the first digital down converter and the first comb shape in turn and extracts interpolation filter, and the output that described the first comb shape extracts interpolation filter is connected with the first input end of a CPRI frame processing module;
The first output of a described CPRI frame processing module is connected with the 4th comb shape in turn and extracts interpolation filter, the 3rd digital up converter, the second digital to analog converter and the first simulation upconverter;
The output of described the second analog down converter is connected with the 3rd analog to digital converter, the 4th digital down converter and the 3rd finite impulse response filter in turn, and the output of described the 3rd finite impulse response filter is connected with the second input of a CPRI frame processing module;
The second output of a described CPRI frame processing module is connected with the 6th finite impulse response filter, the 5th digital up converter, the 4th digital to analog converter and the second simulation upconverter in turn;
A described CPRI frame processing module is connected with the 9th buffer.
And shown in concrete by Fig. 3, the CPRI frame processing module in the described near-end machine is connected with the 2nd CPRI frame processing module in the expanding element.And a described CPRI frame processing module and the 2nd CPRI frame processing module are all for carrying out framing solution frame according to the CPRI agreement and then to the signal that receives.
According to above-mentioned system of the present invention, describe particularly system of the present invention and carry out the process that downlink data transmission is processed:
1, described near-end machine carries out after analog down processes the simulation 2G signal that transmitted by base station coupling and simulation 3G signal, be converted to digital signal by analog to digital converter, and then obtain 2G digital signal and 3G digital signal, in addition, described near-end machine is by the 9th buffer and then will be sent to by the WLAN signal that the base station is transmitted a CPRI frame processing module;
2,2G digital signal and 3G digital signal are carried out respectively successively after Digital Down Convert and filtering extraction process, obtain base band 2G signal and the base band 3G signal of low rate, and base band 2G signal and base band 3G signal are sent to a CPRI frame processing module;
3, a described CPRI frame processing module is according to the CPRI agreement and then with WLAN signal, base band 2G signal and base band 3G signal framing, and by Optical Fiber Transmission to expanding element;
4, the 2nd CPRI frame processing module in the described expanding element is exported respectively WLAN signal, 2G signal and 3G signal according to the CPRI agreement and then after separating frame to the received signal;
5, the 2G signal of output carried out sending to the first ethernet frame processing module by the first buffer after corresponding filtering extraction and Digital Up Convert are processed successively, and the 3G signal of output is by the 5th buffer and then send to the first ethernet frame processing module, in addition, the WLAN signal of output is converted to the 100 m ethernet signal after processing through Ethernet switch, and described 100 m ethernet signal sends to the first ethernet frame processing module by the tenth buffer;
6, described the first ethernet frame processing module according to the basic agreement of gigabit ethernet signal transmission to after receiving 2G signal, 3G signal and 100 m ethernet signal and carrying out framing, successively by the first gigabit Ethernet chip, the first Ethernet interface 1, netting twine 2, the second Ethernet interface 3 and the second gigabit Ethernet chip and then be transferred to the second ethernet frame processing module that covers in the slave;
7, described the second ethernet frame processing module is according to the agreement of gigabit Ethernet framing, and then after separating frame to the received signal, obtains 2G signal, 3G signal and 100 m ethernet signal;
8, the 2G signal that obtains and 3G signal are carried out respectively corresponding interpolation filtering, Digital Up Convert successively, digital-to-analogue conversion is processed and the simulation upconversion process after, go out by antenna transmission, to realize the covering of 2G, 3G signal, and with the 100 m ethernet signal that obtains successively by the 11 buffer and 100 m ethernet chip and then launch, to realize 100,000,000 function of surfing the Net.
And in the transmitting uplink data processing procedure, a described CPRI frame processing module is for according to the CPRI agreement and then separate to the received signal frame, described the 2nd CPRI frame processing module is for according to the CPRI agreement and then carry out to the received signal framing, described the first ethernet frame processing module is to separate to the received signal frame for the basic agreement of transmitting according to gigabit ethernet signal, and described the second ethernet frame processing module is for carrying out to the received signal framing according to the basic agreement of gigabit ethernet signal transmission.Yet because the process of ul transmissions data is the inverse process of downlink transmission data substantially, therefore the transmitting uplink data link is described in detail.
Got by above-mentioned, described near-end machine and expanding element are according to the CPRI agreement, utilize light to transmit, and adopted netting twine 2 to realize the transmission of 1000M bandwidth digital signals between described expanding element and the covering slave, when therefore system of the present invention can and then realize that 2G signal, 3G signal are registered one's residence covering and broadband networking function by netting twine 2, can also save wiring cost, improve user's reception degree, support remote power feeding.
Be further used as preferred embodiment, this system also comprises local switch, and described local switch is connected with described Ethernet switch.
In addition, the system core of the present invention also is to adopt netting twine 2 to realize 2G, 3G and the transmission of 100 m ethernet signal.Because 2G, the 3G signal is continuous continual mobile communication signal, and traditional ethernet is just to carry out the signal transmission under the upper strata requires, and Frame length is not fix, so directly utilize netting twine 2 transmission 2G, 3G and 100 m ethernet signal, this will inevitably cause 2G, the interruption of 3G signal, therefore according to actual requirement redesign ethernet frame format, namely be further used as preferred embodiment, when the basic agreement that described the first ethernet frame processing module and the second ethernet frame processing module are used for transmitting according to gigabit ethernet signal is carried out framing to the signal that receives, described the first ethernet frame processing module and the second ethernet frame processing module form ethernet frame according to the basic agreement of gigabit ethernet signal transmission with the signal that receives, and described ethernet frame is specific as follows.
Described ethernet frame, its length are the anchor-frame of 800 bytes, and wherein 780 bytes are used for realizing the transmission of system signal, and 20 bytes are Ethernet protection gap.Be IQ two-way 8bit according to system definition 2G signal, the digital signal of speed 31.25Mbps, the 3G signal is IQ two-way 8bit, the digital signal of speed 15.625Mbps, the 100 m ethernet signal is 5bit, the digital signal of speed 25Mbps.Therefore the 2G signal has accounted for the digital bandwidth of 500M in system transmissions, and the 3G signal has occupied the digital bandwidth of 250M, and the 100 m ethernet signal has occupied the digital bandwidth of 125M, and system still has the 125M bandwidth to can be used for protecting gap and system's control.Because the length of described ethernet frame is fixed as 800 bytes; and the bandwidth ratio shared according to above-mentioned each signal; can be among a frame; 400 bytes are the 2G signal; 200 bytes are the 3G signal; 100 byte 100 m ethernet signals, 80 bytes are that system monitoring signal and 20 bytes are the system protection gap.
Set the ethernet frame that X represents 800 bytes, and X
1, X
2, X
3, X
4Be followed successively by respectively four parts of ethernet frame, 2G_I and 2G_Q are expressed as respectively the IQ two-way 2G signal of reception, 3G_I and 3G_Q are expressed as respectively the IQ two-way 3G signal of reception, DATA_E is expressed as the 100 m ethernet signal of reception, and DATA_C is expressed as the system monitoring signal, described ethernet frame then, its form is:
X?=?[X
1、X
2、X
3、X
4]；
X
1?=[2G_I,2G_Q,3G_I,?2G_I,2G_Q,3G_Q]；
X
2?=[2G_I,2G_Q,3G_I,DATA_E,?2G_I,2G_Q,3G_Q,DATA_E]；
X
3=[2G_I,2G_Q,3G_I,DATA_C,?2G_I,2G_Q,3G_Q,DATA_C]；
X
4?=[0]；
Wherein, the length of X1 is 60 bytes, X
2Length be 400 bytes, X
3Length be 320 bytes, X
4Be expressed as the system protection gap of 20 bytes.
Like this, when utilizing netting twine 2 to transmit simultaneously 2G, 3G and 100 m ethernet signal in system of the present invention, also can guarantee Systems balanth of the present invention and reliability, and greatly improve the experience sense that the user uses system of the present invention.
More than be that better enforcement of the present invention is specified, but the invention is not limited to described embodiment, those of ordinary skill in the art make all equivalent variations or replacement also can doing under the prerequisite of spirit of the present invention, the distortion that these are equal to or replace all is included in the application's claim limited range.
Claims (9)
1. net merges the indoor signal cover system of access more than one kind, it is characterized in that: the near-end machine that this system comprises netting twine (2) and is used for being connected with the base station, described near-end machine is connected with at least one expanding element, described expanding element is connected with at least one and covers slave, and described expanding element carries out communication by netting twine (2) between the slave and is connected with covering, and described covering slave is connected with antenna.
2. described a kind of many nets merge the indoor signal cover system of access according to claim 1, it is characterized in that: the first signal processing module that described expanding element comprises supply module and is connected with near-end machine, described first signal processing module is connected with the first gigabit Ethernet chip and the first Ethernet interface (1) in turn, and described the first Ethernet interface (1) also is connected with supply module;
Described covering slave comprises the second Ethernet interface (3), the secondary signal processing module that described the second Ethernet interface (3) is connected with the second gigabit Ethernet chip in turn and is connected with antenna, described the second Ethernet interface (3) also are connected with and are subjected to electric module;
Described first signal processing module communicates by the first gigabit Ethernet chip, the first Ethernet interface (1), netting twine (2), the second Ethernet interface (3) and the second gigabit Ethernet chip and then with the secondary signal processing module successively and is connected.
3. described a kind of many nets merge the indoor signal cover system of access according to claim 2, it is characterized in that: described first signal processing module comprises the 2nd CPRI frame processing module that is connected with near-end machine and the first ethernet frame processing module that is used for according to the basic agreement of gigabit ethernet signal transmission the signal that receives being carried out framing solution frame, described the first ethernet frame processing module is connected with the first gigabit Ethernet chip, the first output of described the 2nd CPRI frame processing module is connected with the second comb shape in turn and extracts interpolation filter, the first digital up converter and the first buffer, the output of described the first buffer is connected with the first input end of the first ethernet frame processing module;
The first output of described the first ethernet frame processing module is connected with the 4th buffer, the 3rd digital down converter and the 3rd comb shape in turn and extracts interpolation filter, and the output that described the 3rd comb shape extracts interpolation filter is connected with the first input end of the 2nd CPRI frame processing module;
The second output of described the 2nd CPRI frame processing module is connected with the 5th buffer, and the output of described the 5th buffer is connected with the second input of the first ethernet frame processing module;
The second output of described the first ethernet frame processing module is connected with the 8th buffer, and the output of described the 8th buffer is connected with the second input of the 2nd CPRI frame processing module;
Described the 2nd CPRI frame processing module also is connected with Ethernet switch and the tenth buffer in turn, and described the tenth buffer is connected with the first ethernet frame processing module.
4. described a kind of many nets merge the indoor signal cover system of access according to claim 2, it is characterized in that: described secondary signal processing module comprises the 3rd analog down converter, the 4th analog down converter and the second ethernet frame processing module that is used for according to the basic agreement of gigabit ethernet signal transmission the signal that receives being carried out framing solution frame, described the second ethernet frame processing module is connected with the second gigabit Ethernet chip, the first output of described the second ethernet frame processing module is connected with the second buffer in turn, the first finite impulse response filter, the second digital up converter, the first digital to analog converter and the 3rd simulation upconverter, the output of described the 3rd simulation upconverter is connected with the input of antenna;
The input of described the 3rd analog down converter is connected with the output of antenna, the output of described the 3rd analog down converter is connected with the second analog to digital converter, the second digital down converter, the second finite impulse response filter and the 3rd buffer in turn, and the output of described the 3rd buffer is connected with the first input end of the second ethernet frame processing module;
The second output of described the second ethernet frame processing module is connected with hex buffer, the 4th finite impulse response filter, the 4th digital up converter, the 3rd digital to analog converter and the 4th simulation upconverter in turn, and the output of described the 4th simulation upconverter is connected with the input of antenna;
The input of described the 4th analog down converter is connected with the output of antenna, the output of described the 4th analog down converter is connected with the 4th analog to digital converter, the 5th digital down converter, the 5th finite impulse response filter and the 7th buffer in turn, and the output of described the 7th buffer is connected with the second input of the second ethernet frame processing module;
Described the second ethernet frame processing module also is connected with the 11 buffer and 100 m ethernet chip in turn.
5. described a kind of many nets merge the indoor signal cover system of access according to claim 2, it is characterized in that: described near-end machine comprises the first analog down converter, the second analog down converter, the 9th buffer and a CPRI frame processing module that is connected with the first signal processing module, the output of described the first analog down converter is connected with the first analog to digital converter, the first digital down converter and the first comb shape in turn and extracts interpolation filter, and the output that described the first comb shape extracts interpolation filter is connected with the first input end of a CPRI frame processing module;
The first output of a described CPRI frame processing module is connected with the 4th comb shape in turn and extracts interpolation filter, the 3rd digital up converter, the second digital to analog converter and the first simulation upconverter;
The output of described the second analog down converter is connected with the 3rd analog to digital converter, the 4th digital down converter and the 3rd finite impulse response filter in turn, and the output of described the 3rd finite impulse response filter is connected with the second input of a CPRI frame processing module;
The second output of a described CPRI frame processing module is connected with the 6th finite impulse response filter, the 5th digital up converter, the 4th digital to analog converter and the second simulation upconverter in turn;
A described CPRI frame processing module is connected with the 9th buffer.
6. described a kind of many nets merge the indoor signal cover system of access according to claim 3, it is characterized in that: when the basic agreement that described the first ethernet frame processing module is used for transmitting according to gigabit ethernet signal is carried out framing to the signal that receives, described the first ethernet frame processing module forms ethernet frame according to the basic agreement of gigabit ethernet signal transmission with the signal that receives, and the form of described ethernet frame is as follows:
X?=?[X
1、X
2、X
3、X
4]；
X
1?=[2G_I,2G_Q,3G_I,?2G_I,2G_Q,3G_Q]；
X
2?=[2G_I,2G_Q,3G_I,DATA_E,?2G_I,2G_Q,3G_Q,DATA_E]；
X
3=[2G_I,2G_Q,3G_I,DATA_C,?2G_I,2G_Q,3G_Q,DATA_C]；
X
4?=[0]；
Wherein, X represents an ethernet frame, X
1, X
2, X
3, X
4Be followed successively by respectively four parts of ethernet frame, 2G_I and 2G_Q are expressed as respectively the IQ two-way 2G signal of reception, and 3G_I and 3G_Q are expressed as respectively the IQ two-way 3G signal of reception, DATA_E is expressed as the 100 m ethernet signal of reception, and DATA_C is expressed as the system monitoring signal, in addition, and X
4Be expressed as the system protection gap.
7. described a kind of many nets merge the indoor signal cover system of access according to claim 3, and it is characterized in that: this system also comprises local switch, and described local switch is connected with described Ethernet switch.
8. according to claim 1 to the indoor signal cover system of 7 each described a kind of many net fusion accesses, it is characterized in that: described netting twine (2) adopts CAT5E UTP cable.
9. described a kind of many nets merge the indoor signal cover system of access according to claim 2, and it is characterized in that: described the first Ethernet interface (1) and the second Ethernet interface (3) have all adopted the Ethernet interface that contains the network transformer of supporting supply module.
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