CN1774094A - A wireless base station system and its method for transmitting and receiving information - Google Patents

Abstract

A radio base station system comprises a base band unit, a radio frequency remote end unit and a light interface. Its signal receiving method includes converting received electric signal to be light signal by radio frequency remote end unit then sending it to base band unit, converting received light signal to be electric signal by base band unit and then processing electric signal; its signal emitting method includes converting electric signal to be light signal by base band unit then sending it to radio frequency remote end unit, converting receiving light signal to be electric signal by radio frequency remote end unit and then emitting electric signal .

Description

A wireless base station system and its method for transmitting and receiving information

technical field

The invention relates to the networking technology in the wireless communication system, in particular to a wireless base station system and a method for transmitting and receiving information.

Background technique

At present, in the networking process of the third generation wireless communication system (3G), such as the networking process of the code division multiple access (CDMA) communication system and the wideband code division multiple access communication system (WCDMA), the three-sector method is The mainstream configuration method, that is, each site uses a macro base station for signal coverage, and multiple macro base stations form a wireless base station system. Referring to FIG. 1 , an existing macro base station mainly includes: a baseband unit 101 and a radio frequency unit 102 , which are connected by cables. Wherein, the baseband unit 101 includes: a baseband data processor 103, used to process baseband data; The data is despread and then transmitted to the baseband data processor 103. The radio frequency unit 102 further includes: a transceiver 105 for receiving and sending radio frequency signals; a power amplifier 106 for amplifying the radio frequency signals to be sent. The transceiver 105 further includes: an IQ modulator/demodulator 107 , a filter 108 , a digital-to-analog/analog-to-digital converter 109 and a radio frequency device 110 .

The above-mentioned process of sending data by the existing macro base station is as follows: the baseband data processor 103 sends the baseband data to the spread spectrum/despreader 104 for spreading, and the spread baseband data is sent to the radio frequency unit 102, and in the radio frequency unit 102, The baseband data is first modulated by the IQ modulator/demodulator 107, then sent to the filter 108 for filtering, and then converted into an analog signal by the digital-to-analog/analog-to-digital converter 109. After being amplified by the power amplifier 106, it is sent out by the antenna 111.

The above-mentioned process of receiving data by the existing macro base station is: the signal received by the antenna 111 directly enters the radio frequency device 110 for radio frequency processing, and then is converted into a data signal by the digital-to-analog/analog-to-digital converter 109, and then modulated by IQ after being filtered by the filter 108 The /demodulator 107 performs demodulation, and the demodulated signal is sent to the spread spectrum/despreader 104 of the baseband unit 101 for despreading, and the despreaded data is sent to the baseband data processor for processing.

In the macro base station of the above prior art, the baseband unit 101 and the radio frequency unit 102 are connected by a cable, and due to the attenuation characteristics of the cable transmission signal, the baseband unit 101 and the radio frequency unit 102 cannot be too far apart. The baseband unit 101 and the radio frequency unit 102 are placed together, causing the macro base station to occupy a relatively large equipment room area. Referring to Fig. 2, the existing networking needs to place a macro base station at each site, and use a cellular structure to cover the entire communication area that needs to be covered. Therefore, the macro base station occupies a large space and requires a dedicated computer room and antenna land. Not only is the land cost high, but the resources of the computer room are quite scarce at present, making it difficult to find a computer room. In addition, since one baseband unit can only cooperate with one radio frequency unit, the existing macro base station cannot perform centralized management on the baseband unit, and the processing efficiency is low.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a wireless base station system that can centrally manage the baseband units of the base station so that the radio frequency units can be distributed to cover the communication area, saving costs and improving processing efficiency.

Another object of the present invention is to provide the above-mentioned method for transmitting and receiving information of the wireless base station system, which can also centrally manage the baseband units of the base station, so that the radio frequency units can be distributed to cover the communication area, saving costs and improving processing efficiency.

In order to achieve the above object, the technical solution of the present invention is:

A wireless base station system, the system includes: at least one baseband unit, and at least one radio frequency remote unit; the baseband unit is centralized; each of the baseband unit and the radio frequency remote unit includes at least one An optical interface for exchanging electrical signals; using their respective optical interfaces, the baseband unit and the radio frequency remote unit are connected through optical fibers.

As a preferred solution of the wireless base station system of the present invention, the baseband unit includes a plurality of optical interfaces, and each optical interface is respectively connected to a different radio frequency remote unit through an optical fiber.

As another preferred solution of the wireless base station system of the present invention, multiple radio frequency remote units are cascaded through an optical fiber, and at least one radio frequency remote unit is connected to the optical interface of the baseband unit through an optical fiber.

The baseband unit and the radio frequency remote unit further include a common public radio interface CPRI logic unit respectively, which is used to perform CPRI format conversion and analysis on data;

The CPRI logic unit in the baseband unit converts the data that needs to be sent to the radio frequency remote unit into a CPRI format, adds it to the CPRI data frame and sends it to the optical interface of the baseband unit, and receives the radio frequency remote received by the optical interface of the baseband unit. Analyze the data sent by the end unit;

The CPRI logic unit in the radio frequency remote unit receives the data from the baseband unit received by the optical interface of the radio frequency remote unit, parses out the data it needs, and converts the data received from the outside into CPRI format and inserts it into the CPRI data frame, Send to the optical interface of the RF remote unit.

As another preferred solution of the wireless base station system of the present invention, each radio frequency remote unit is connected to one baseband unit, and all baseband units are centrally arranged in one baseband device.

A method for transmitting information by a wireless base station system, the wireless base station system comprising at least one baseband unit and a radio frequency remote unit, the baseband unit is centrally arranged and connected to the radio frequency remote unit through an optical fiber;

The method includes:

A. The baseband unit converts the electrical signal to be sent to the radio frequency remote unit into an optical signal, and sends the optical signal to the corresponding radio frequency remote unit according to the preset correspondence between each radio frequency remote unit and its own signal;

B. After receiving the optical signal, the radio frequency remote unit converts the optical signal into an electrical signal for information transmission processing.

As a preferred solution of the above wireless base station system transmitting information method, the corresponding relationship is that each radio frequency remote unit corresponds to an optical interface in the baseband unit;

The signal sending process described in step A is: the baseband unit sends the signal to be sent to the radio frequency remote unit to the optical interface corresponding to the radio frequency remote unit in itself.

As another preferred solution of the method for transmitting information by the above-mentioned wireless base station system, the transmission signal between the baseband unit and the radio frequency remote unit is in the form of a data frame, and the corresponding relationship is in the corresponding data frame of each radio frequency remote module a time slot of

The signal sending process described in step A is: the baseband unit places the data to be sent to the radio frequency remote unit in the corresponding time slot of the data frame, and converts it into an optical signal and sends it to the radio frequency remote unit;

After the radio frequency remote unit in step B converts the received optical signal into an electrical signal, it further includes: reading the data of its corresponding time slot from the electrical signal in the form of a data frame, and performing information transmission processing.

The data frame conforms to the Common Public Radio Interface format.

A method for receiving information by a wireless base station system, the wireless base station system comprising at least one baseband unit and a radio frequency remote unit, the baseband unit is centrally arranged and connected to the radio frequency remote unit through an optical fiber;

The method includes:

a. The radio frequency remote unit performs radio frequency processing on the information received from the outside, converts the electrical signal into an optical signal, and sends it to the baseband unit;

b. After receiving the optical signal, the baseband unit converts the optical signal into an electrical signal, and determines the radio frequency remote unit corresponding to each signal according to the preset correspondence between each radio frequency remote unit and its own signal, and performs baseband processing.

As a preferred solution of the above wireless base station system receiving information method, the corresponding relationship is that each radio frequency remote unit corresponds to an optical interface in the baseband unit;

The determination process in step b is: the baseband unit determines the radio frequency remote unit corresponding to each signal according to the optical interface through which each optical signal is received.

As a preferred solution of the method for receiving information by the above-mentioned wireless base station system, the transmission signal between the baseband unit and the radio frequency remote unit is in the form of a data frame, and the corresponding relationship is in the data frame corresponding to each radio frequency remote module a time slot;

After the radio frequency remote unit described in step a performs radio frequency processing on the information received from the outside, it further includes: adding the obtained data to the time slot corresponding to the data frame and the radio frequency remote unit;

The determination process in step b is: the baseband unit learns the radio frequency remote unit corresponding to the data in each time slot according to the corresponding relationship between each time slot in the data frame and the radio frequency remote unit.

The data frame conforms to the Common Public Radio Interface format.

Because the present invention adopts optical interface and optical fiber to connect baseband unit and radio frequency unit, utilizes the advantage of optical fiber long-distance transmission signal, makes baseband unit and radio frequency unit separate from one device, and radio frequency unit can be placed in apart from baseband unit tens of kilometers, even several Ten kilometers away, so the radio frequency unit can be used for distributed coverage, that is, at each site in the network, only an outdoor radio frequency unit and antenna with a small area can be placed to cover the communication area, thus solving the problem of computer room The problem of resource scarcity reduces the cost of land use; at the same time, multiple baseband units corresponding to the radio frequency unit can be placed in a device in the central computer room, and all operation and maintenance can be carried out in this device, which not only improves the maintenance processing efficiency, but also saves A large number of computer room resources and maintenance workload.

In addition, the present invention can utilize existing rich optical fiber resources to connect the baseband unit and the radio frequency unit, and the investment cost is low.

Description of drawings

FIG. 1 is a schematic structural diagram of an existing macro base station;

FIG. 2 is a schematic diagram of a network using a macro base station to cover a communication area in the prior art;

FIG. 3 is a schematic structural diagram of a wireless base station system according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a network that uses the wireless base station system to cover a communication area according to an embodiment of the present invention;

FIG. 4A is a schematic structural diagram of the baseband cabinet according to the embodiment of the present invention;

5 is a schematic diagram of a baseband unit and a radio frequency remote unit in a star-shaped network according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of networking of the baseband unit and the radio frequency remote unit in a cascade manner according to an embodiment of the present invention;

FIG. 7 is a flow chart of sending information by a wireless base station system using a star network according to an embodiment of the present invention;

FIG. 8 is a flow chart of receiving information by a wireless base station system using a star network according to an embodiment of the present invention;

FIG. 9 is a flow chart of sending information by the wireless base station system networked in cascade mode according to the embodiment of the present invention;

FIG. 10 is a flow chart of receiving information by a wireless base station system networked in a cascading manner according to an embodiment of the present invention.

Detailed ways

The implementation method of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 3, the wireless base station system described in this embodiment includes: a baseband unit 201 and a radio frequency unit 202, which are connected by an optical fiber. Since the radio frequency unit 202 of this embodiment is placed at the far end of the baseband unit 201, the following The radio frequency unit 202 is referred to as the radio frequency remote unit 202 . Wherein, the baseband unit 201 includes: a baseband data processor 103, for processing baseband data; a spreader/despreader 104, for spreading the baseband data sent, and despreading the received radio frequency data; at least An optical interface 203 is used to convert the electrical signal generated by the baseband unit into an optical signal that can be transmitted by optical fiber, and convert the optical signal from the radio frequency remote unit 202 into an electrical signal that can be processed by the baseband unit. The radio frequency remote unit 202 further includes: at least one optical interface 203, which is used to convert the received optical signal into an electrical signal, and converts the transmitted electrical signal into an optical signal; the transceiver 105 is used to send and receive the radio frequency signal ; The power amplifier 106 is used to amplify the radio frequency signal to be sent. Wherein transceiver 105 comprises again: IQ modulator/demodulator 107, filter 108, digital-to-analog/analog-to-digital converter 109 and radio frequency device 110, because the component and working principle of described transceiver are existing known technology , which will not be described in detail here.

The base station system described in this embodiment includes at least one baseband unit 201, each baseband unit 201 corresponds to at least one different radio frequency remote unit 202, and each radio frequency remote unit 202 is connected to the baseband unit 201 through an optical interface and an optical fiber , the baseband unit 202 centrally processes the data of different radio frequency remote units, and the radio frequency remote unit 202 can be extended to the remote end of more than ten or even tens of kilometers through optical fibers, and because of its small size, it can be pulled step by step Remotely placed in each coverage communication area, there is no need to set up a dedicated computer room, which not only meets the purpose of covering the cell, but also saves computer room resources.

Referring to Fig. 4, in view of the above-mentioned characteristics of this embodiment, this embodiment can make full use of the existing rich optical fiber resources of the operator, and adopt the radio frequency remote unit 202 to carry out distributed coverage on the communication area, and only It is necessary to place the outdoor radio frequency remote unit 202 and the antenna to replace the existing macro base station, and there is no need to rent a computer room, thereby solving the problem of land occupation of the computer room; at the same time, considering that the radio frequency unit has been extended by optical fiber, if the wireless base station system There are multiple baseband units in the network, and multiple baseband units can be centrally installed in a local baseband cabinet 401. The baseband cabinet can be placed in a central computer room, and the radio frequency remote units of each site can be connected through the optical fiber resources of the operator. to a baseband cabinet 401 in a central computer room; all operation and maintenance can be performed on the side of the baseband cabinet 401, saving a lot of computer room resources and reducing maintenance workload.

FIG. 4A is a schematic structural view of a baseband cabinet 401. Referring to FIG. 4A, the baseband cabinet 401 has a layered structure, and multiple baseband units 201 in the wireless base station system are respectively placed on each layer of the baseband cabinet 401. The operation and maintenance of multiple baseband units 201 are performed in the baseband cabinet 401 collectively.

In the wireless base station system described in this embodiment, the networking between the baseband unit 201 and the radio frequency remote unit 202 is mainly based on two basic methods, one is a star network, and the other is a hierarchical network. Networking method.

FIG. 5 is a schematic diagram of a baseband unit 201 and a radio frequency remote unit 202 forming a star network. As shown in Figure 5:

A baseband unit 201 in the base station system includes a plurality of optical interfaces 203, each optical interface 203 is connected to a pair of optical fibers, each optical interface 203 is connected to a radio frequency remote unit through a pair of optical fibers, and each optical interface 203 is fixed Corresponding to a radio frequency remote unit, the fixed relationship can be preset. In this way, according to the identification of the optical interface 203, a baseband unit can identify which radio frequency remote unit is receiving data, and which optical interface 203 should be used to send data to a radio frequency remote unit.

Fig. 6 is a schematic diagram of baseband unit 201 and radio frequency remote unit 202 through cascade networking, as shown in Fig. 6: a baseband unit 201 in the base station system includes at least one optical interface 203, and each optical interface 203 is connected to A pair of optical fibers, a pair of optical fibers can support cascading at least one radio frequency remote unit 202 . The number of radio frequency remote units 202 supported by a pair of optical fibers is related to the actual application design. Generally speaking, a pair of optical fibers can support the information of up to four radio frequency remote units, and multiple radio frequency remote units 202 can be cascaded. Connection, that is: the radio frequency remote unit 202 closest to the baseband unit 201 is directly connected to the baseband unit 201 through an optical fiber, and other radio frequency remote units 202 are cascaded one by one through an optical fiber; the middle radio frequency remote unit 202 has two optical interfaces 203 , wherein one optical interface 203 is connected to the baseband unit 201 or the upper-level radio frequency remote unit 202, and the other optical interface 203 is connected to the lower-level radio frequency remote unit 202; the farthest radio frequency remote unit 202 can be provided with an optical Interface 203. In addition, the radio frequency remote units 202 cascaded on the baseband unit 201 can be divided into different groups according to conditions such as regions, and the radio frequency remote units 202 of different groups are cascaded on different optical interfaces 203 of the baseband unit 201; The radio frequency remote unit 202 of the group is cascaded on the same optical interface 203 of the baseband unit 201, and the optical interface 203 of the baseband unit 201 corresponding to the radio frequency remote unit 202 is preset, so the data belonging to the same group of radio frequency remote units can be sent through the same optical interface 203.

As shown in Figure 6, in the cascade networking mode, in order to make the baseband unit 201 connect to multiple radio frequency remote units 202 through an optical interface 203, it is necessary to add a general public wireless network to the baseband unit 201 and the radio frequency remote unit 202. Interface (CPRI) logic unit 204, the CPRI logic unit 204 may be a CPRI logic chip, which is used to convert the sent data into a data frame in CPRI format, and parse the received data frame in CPRI format. The CPRI is a standard interface. In this embodiment, the data of each radio frequency remote unit 202 is located in a fixed time slot in the CPRI data frame, and each radio frequency remote unit 202 and each of the CPRI data frames The corresponding relationship of the time slots is preset. When sending data, the CPRI logic unit places the data of each radio frequency remote unit 202 in corresponding time slots of the CPRI data frame; when receiving data, the CPRI logic unit takes out the data in each time slot of the CPRI data frame, Therefore, the data of each radio frequency remote unit 202 is correspondingly acquired.

FIG. 7 is a flow chart of information transmission by the wireless base station system using a star network according to this embodiment. Referring to FIGS. 5 and 7, the process of transmitting information includes:

Step 701, the baseband data processor transmits the data sent to each radio frequency remote unit 202 to the spreading/despreading unit for spreading, and according to the preset correspondence between each optical interface 203 and each radio frequency remote unit 202 , sending the data sent to each radio frequency remote unit 202 to the optical interface 203 corresponding to each radio frequency remote unit 202 .

In step 702, the optical interface 203 of the baseband unit 201 that receives the transmitted data converts the electrical signal data into optical signal data, and sends it to the radio frequency remote unit 202 correspondingly connected to the optical interface 203 through an optical fiber.

Step 703, after the optical interface 203 of the radio frequency remote unit 202 receives the optical signal data, convert the optical signal data into electrical signal data, process the electrical signal data into a radio frequency signal through the transceiver, and amplify through the power amplifier 106 After that, it is transmitted through the antenna 111.

Fig. 8 is a flow chart of receiving information by the wireless base station system using a star network according to this embodiment, as shown in Fig. 5 and Fig. 8, the process of receiving signals includes:

Step 801, the radio frequency remote unit 202 receives the radio frequency signal through the antenna 111, converts it into electrical signal data through the transceiver 105, converts it into optical signal data through the optical interface 203, and sends the optical signal data to the baseband unit through the optical fiber 201 corresponds to the optical interface 203 .

Step 802 , after receiving the optical signal data, the optical interface 203 of the baseband unit 201 converts the optical signal data into electrical signal data, despreads it through the spreader/despreader 104 , and sends it to the baseband data processor 103 .

Step 803, the baseband data processor 103 judges which optical interface 203 the received data comes from, and according to the preset correspondence between the optical interface 203 and the radio frequency remote unit 202, learns which radio frequency remote unit the received data signal comes from end unit 202, and perform corresponding data processing.

Fig. 9 is a flow chart of transmitting information by the wireless base station system in cascading mode described in this embodiment, referring to Fig. 6 and Fig. 9, the process includes the following steps:

In step 901, the baseband data processor 103 transmits the data sent to each radio frequency remote unit 202 to the spreader/despreader 104 for spreading.

In step 902, the CPRI logic chip 204 in the baseband unit 201 converts the sent data into a data frame in CPRI format; in the data frame in CPRI format, the data sent to different radio frequency remote units 202 are respectively located at different times in the data frame slot, and the data of each radio frequency remote unit 202 corresponds to a relatively fixed time slot position in the data frame, and transmits the converted data frame to the optical interface 203 .

In this step, since different groups of radio frequency remote units 202 are connected to different optical interfaces 203 of the baseband unit 201 , radio frequency remote units 202 of the same group are connected to the same optical interface 203 of the baseband unit 201 . Therefore, according to the corresponding relationship between groups and optical interfaces, data belonging to the same group of radio frequency remote units 202 is converted into CPRI data frames and sent through the same optical interface 203; data belonging to different groups of radio frequency remote units 202 is converted into CPRI data After frame, it is sent through different optical interface 203.

Step 903, the optical interface 203 of the baseband unit 201 converts the electrical signal data frame to be sent into an optical signal data frame, and sends the optical signal data frame to the radio frequency remote unit 202 directly connected to the baseband unit 201 through an optical fiber, and the The RF remote unit 202 serves as the current RF remote unit 202 .

Step 904, after the optical interface 203 of the current radio frequency remote unit 202 receives the optical signal data frame to be sent, convert the optical signal data frame into an electrical signal data frame, and then the CPRI logic unit 204 of the current radio frequency remote unit 202 analyzes The electrical signal data frame is to judge whether there is data in the time slot corresponding to the current radio frequency remote unit 202 in the electrical signal data frame, if there is, then read the data, and pass the read data through the transceiver 105 After being processed by the power amplifier 106, it is transmitted by the antenna, and the next step is executed; otherwise, the next step is executed.

Step 905, the current radio frequency remote unit 202 judges whether there is data in other time slots of the electrical signal data frame, if yes, it means that there is data of other radio frequency remote unit 202 in the electrical signal data frame, and step 906 is executed , otherwise, it means that there is no data of other radio frequency remote units 202 in the electrical signal data frame, so the transmission process ends.

Since the networking structure is relatively fixed, several radio frequency remote units 202 cascaded on one optical interface 203 and the connection order of the radio frequency remote units 202 have been fixed in advance, so this step can also be replaced by: the current radio frequency remote unit 202 judges Whether it is the final radio frequency remote unit 202 in the cascade relationship, if yes, execute step 906, otherwise, end the sending process.

Step 906, the current radio frequency remote unit 202 does not make any changes to the data in other time slots in the electrical signal data frame, and uses the optical interface 203 connected to the next-level radio frequency remote unit 202 to convert the electrical signal data frame into optical signal data frame, and continue to forward the optical signal data frame to the next-level radio frequency remote unit 202 through the optical fiber. At this time, the next-level radio frequency remote unit 202 is the current radio frequency remote unit 202, and return to step 904.

Fig. 10 is a flow chart of receiving information by the wireless base station system in cascading mode described in this embodiment. Referring to Fig. 6 and Fig. 10, the process of receiving signals includes the following steps:

Step 1001 , the radio frequency remote unit 202 performs radio frequency processing on the information received by the antenna through the transceiver 105 .

Step 1002 , the radio frequency remote unit 202 judges whether the optical signal data frame conforming to the CPRI format sent by the radio frequency remote unit 202 of the next level is received, if yes, execute step 1003 , otherwise execute step 1004 .

Step 1003, the radio frequency remote unit 202 uses the optical interface 203 to convert the received optical signal data frame into an electrical signal data frame, and adds the information received by itself to the corresponding time in the electrical signal data frame through the CPRI logic unit 204 In the slot, the electrical signal data frame after the information is added is converted into an optical signal data frame through the optical interface 203, and step 1005 is executed.

Step 1004, the radio frequency remote unit 202 converts the information received by itself into an electrical signal data frame conforming to the CPRI format through the CPRI logic unit 204, and converts the electrical signal data frame into an optical signal data frame through the optical interface 203, and executes the steps 105.

Step 1005 , the radio frequency remote unit 202 sends the optical signal data frame to the upper radio frequency remote unit 202 or the baseband unit 201 directly connected to the radio frequency remote unit 202 through the optical interface 203 and the optical fiber.

Step 1006, after the optical interface 203 of the baseband unit 201 receives the optical signal data frame, convert the optical signal data frame into an electrical signal data frame, and then analyze the electrical signal data frame through the CPRI logic chip 204, that is, the electrical signal data frame The data in each time slot is taken out, and the data taken out by each time slot is used as the data of the radio frequency remote unit 202 corresponding to the time slot, and after being despread by the spreader/despreader 104, it is performed by the baseband data processor 103 deal with.

The foregoing respectively introduces the structure of the wireless base station system of the present invention and the process of sending and receiving information when the network is formed in a star mode and in a cascade mode. Based on the above two networking methods, the present invention can also flexibly set different networking methods, such as adopting a mixed mode networking of star and cascade, which can also achieve the purpose of the present invention, and the flow process of sending and receiving information is the same as that of the above-mentioned same or similar process.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technology can easily think of changes or replacements within the technical scope disclosed in the present invention. , should be covered within the protection scope of the present invention.

Claims (13)

1, a kind of wireless base system, this system comprises: at least one Base Band Unit, and at least one RF remote unit; It is characterized in that,

Described Base Band Unit is concentrated and is provided with;

Comprise respectively in described each Base Band Unit and the RF remote unit that at least one is used for the optical interface that light/signal of telecommunication exchanges; Utilize optical interface separately, Base Band Unit is connected by optical fiber with RF remote unit.

2, wireless base system as claimed in claim 1 is characterized in that, comprises a plurality of optical interfaces in the described Base Band Unit, and each optical interface connects with different RF remote unit respectively by optical fiber.

3, wireless base system as claimed in claim 1 or 2 is characterized in that, a plurality of described RF remote units are by the optical fiber cascade, and wherein at least one RF remote unit is connected with the optical interface of described Base Band Unit by optical fiber.

4, wireless base system as claimed in claim 3 is characterized in that, further comprises respectively in described Base Band Unit and the RF remote unit being used for the common public radio interface CPRI logical block data are carried out CPRI format conversion and parsing;

CPRI logical block in the described Base Band Unit is converted to the CPRI form with the data that need send to RF remote unit, add the optical interface that sends to Base Band Unit in the CPRI Frame to, and receive the data that RF remote unit that the optical interface of Base Band Unit receives sends and resolve;

The data that the optical interface of the CPRI logical block received RF far-end unit in the RF remote unit is received from Base Band Unit, parse the data that self need, and the data that will receive from the external world are converted to the CPRI form and are inserted into the CPRI Frame, are sent to the optical interface of RF remote unit.

5, wireless base system as claimed in claim 1 is characterized in that, described each RF remote unit is connected with a Base Band Unit, and all Base Band Unit are concentrated and to be arranged in the baseband equipment.

6, a kind of method of wireless base system emission information is characterized in that described wireless base system comprises at least one Base Band Unit and RF remote unit, and Base Band Unit is concentrated and is provided with, and is connected with RF remote unit by optical fiber;

This method comprises:

A, Base Band Unit are light signal with the electrical signal conversion that need send to RF remote unit, with the corresponding relation of himself signal described light signal are sent to corresponding RF remote unit according to each RF remote unit that sets in advance;

After B, RF remote unit are received light signal, light signal is converted to the signal of telecommunication, carries out the information emission and handle.

7, method as claimed in claim 6 is characterized in that, described corresponding relation is an optical interface in the corresponding Base Band Unit of each RF remote unit;

The described signal process of transmitting of steps A is: Base Band Unit is sent to optical interface corresponding with this RF remote unit in self with the signal that need send to RF remote unit.

8, method as claimed in claim 6 is characterized in that, the transmission signals between described Base Band Unit and the RF remote unit is the form of Frame, and described corresponding relation is a time slot in each RF far-end module corresponding data frame,

The described signal process of transmitting of steps A is: Base Band Unit places the corresponding time slot of Frame with the data that need send to RF remote unit, and sends to RF remote unit after being converted to light signal;

RF remote unit described in the step B further comprises after the light signal that receives is converted to the signal of telecommunication: read the data of self corresponding time slot from the signal of telecommunication of form of data frames, carry out the information emission and handle.

9, method as claimed in claim 8 is characterized in that, described Frame meets the common public radio interface form.

10, a kind of wireless base system receives the method for information, it is characterized in that described wireless base system comprises at least one Base Band Unit and RF remote unit, and Base Band Unit is concentrated and is provided with, and is connected with RF remote unit by optical fiber;

This method comprises:

A, RF remote unit are converted into light signal with the signal of telecommunication after the information that receives from the external world is carried out radio frequency processing, send to Base Band Unit;

After b, Base Band Unit are received light signal, light signal is converted into the signal of telecommunication, and determines the RF remote unit that each signal is corresponding with the corresponding relation of himself signal, carry out Base-Band Processing according to each RF remote unit that sets in advance.

11, method as claimed in claim 10 is characterized in that, described corresponding relation is an optical interface in the corresponding Base Band Unit of each RF remote unit;

Deterministic process described in the step b is: Base Band Unit is determined the RF remote unit of each signal correspondence according to the optical interface of receiving each light signal.

12, method as claimed in claim 10 is characterized in that, the transmission signals between described Base Band Unit and the RF remote unit is the form of Frame, and described corresponding relation is a time slot in each RF far-end module corresponding data frame;

RF remote unit described in the step a carries out further comprising after the radio frequency processing to the information that receives from the external world: the data that obtain are added to Frame and this RF remote unit time slot corresponding;

Deterministic process described in the step b is: Base Band Unit is known the pairing RF remote unit of data in each time slot according to the corresponding relation of each time slot and RF remote unit in the Frame.

13, method as claimed in claim 12 is characterized in that, described Frame meets the common public radio interface form.

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