CN101159933A

CN101159933A - Split type base station system and networking method and base band unit thereof

Info

Publication number: CN101159933A
Application number: CNA2007101677298A
Authority: CN
Inventors: 吴旺军; 余承东; 谭竹; 蒲涛; 贺文胜; 兰鹏; 周军; 余明
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-05-19
Filing date: 2005-05-19
Publication date: 2008-04-09
Anticipated expiration: 2025-05-19
Also published as: CN101159933B

Abstract

The invention discloses a split-type base station system and a networking method and a baseband unit thereof. In the system, a baseband unit (BBU) of a base station is separated from a radio-frequency unit (RFU), and the RFU is equipped with a baseband radio-frequency interface which is intercommunicated with the BBU to transmit data information, thereby forming the split-type base station system. Additionally, besides the separation of the BBU from the RFU, the BBU capacity is divided and each unit is placed separately. By the capacity-expansion interface and baseband radio-frequency interface provided by the BBU interface units, the networking and capacity-expansion of BBU are realized with flexibility, the occupied area is reduced, the operating cost is reduced, and the operational reliability of the base station system is improved.

Description

Separated base station system and network-building method thereof and Base Band Unit

Technical field

The present invention relates to station technology, refer to the Base Band Unit of a kind of separated base station system and network-building method thereof and composition distributed base station especially.

Background technology

In mobile communication system, the base station is a part important in the mobile communications network, is connected between user terminal and the base station controller, is used for the transmitting/receiving wireless signal, makes the user terminal access of radio network, finish simultaneously and base station controller between information interaction.Fig. 1 is the composition structural representation of base station in the mobile communication system, and as can be seen from Figure 1, this base station mainly comprises:

Base station and base station controller interface are used to finish the interface function between base station and the base station controller (BSC), also can be described as transmission unit; Master control and clock lock unit are finished on the one hand in the controlled function of base station and the base station between each unit the exchange of signaling, business datum and are controlled, and are used on the other hand that other unit provides clock signal in the base station; The up-downgoing baseband signal processing unit is used to finish the processing to physical layer symbols level and chip-level digital signal, and and middle radiofrequency signal processing unit between the interactive digital baseband signal; Middle radiofrequency signal processing unit is used for finishing the conversion between digital baseband signal and the radiofrequency signal; Power amplifier unit and duplexer are used for the middle radiofrequency signal from radiofrequency signal processing unit or antenna is carried out processing and amplifying.

Wherein, base station and base station controller interface unit, master control and clock lock unit and up-downgoing baseband signal processing unit are collectively referred to as baseband portion; Middle radiofrequency signal processing unit, power amplifier unit and duplexer are collectively referred to as radio frequency part, realize the conversion between digital baseband signal and the middle radiofrequency signal, and send the radiofrequency signal after handling.Each part all is placed in the rack among Fig. 1, forms a complete base station.

In traditional base station system, using two kinds of more base stations is macro base station and little base station.Macro base station has bigger capacity usually, can support the configuration of 3 sectors, 6 sectors etc., and outdoor two kinds of forms in the locellus; And the common capacity in little base station is less, only can support the configuration of 1～3 sector, and little base station generally requires to support outdoor application, is a kind of strong the replenishing to the macro base station networking.

Because the big capacity of macro base station support, all veneers and module are concentrated and are placed in the rack, and therefore, the macro base station volume and weight is all bigger, and this just requires special installation machine room or outdoor mounted base; And little base station supports that capacity is less, so volume is also less relatively, supports pole usually or hangs mounting means such as wall, installs more conveniently, does not need special machine room or floor space.Below the macro base station commonly used at present and the composition of little base station are introduced respectively:

(1) macro base station is that transmission unit, master control and the clock lock unit that will form baseband portion is separately positioned on the different function veneers with the up-downgoing baseband signal processing unit, connect by backboard between each veneer, require newly-increased different types of veneer or module according to different dilatations; Duplexer, power amplifier unit, the middle radiofrequency signal processing unit of forming radio frequency part are separately positioned on the different function veneers, connect by outside wiring between each veneer, and above-mentioned component units is placed in the indoor or outdoors type rack, outdoor cabinet also comprises functional units such as temperature control device, power supply, environmental monitoring, transmission equipment, each piece volumes is all bigger, cause the rack volume and weight bigger than normal, carrying, installation cost height, the infield is chosen limited, influences networking speed.Such structure takes up room greatly, power consumption and cost are higher, is having under the backup request, need realize backup by the quantity that increases some kind veneer or module, the backup cost height, and realize complicated.

(2) little base station is that all unit among Fig. 1 all are placed in the structural member module of a compact conformation, and volume is little, and is easy for installation.The configuration of 1～3 sector is supported in general little base station, under the situation of the single sector of single rack support, when more sectors of needs support or capacity configuration, needs to use Multiple Small Cell Sites to carry out networking, has increased the complexity of networking and system management.

Though little base station volume is less, easy for installation, have that capacity is little, dilatation is inconvenient, the inflexible shortcoming of networking.When the needs dilatation, need realize by Multiple Small Cell Sites and cabinet, and be unfavorable for distribution operation and protection behind Multiple Small Cell Sites and the cabinet.Therefore, little base station is not suitable for the bigger application scenario of expection capacity; And baseband portion and radio frequency part adopt the integrated design mode, are unfavorable for the capacity expansion and upgrading of baseband portion and radio frequency part.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of separated base station system, can reduce the floor space of base station system, cuts operating costs, improves simultaneously the reliability of base station system work.

Another purpose of the present invention is to provide a kind of network-building method of split type base station, can easyly realize multiple networking mode between Base Band Unit and the radio frequency unit neatly by this method.

Another object of the present invention is to provide a kind of Base Band Unit of split type base station, by this Base Band Unit, can adopt multiple mode to realize the dilatation of base station neatly, can reduce the floor space of base station system, cut operating costs, improve simultaneously the reliability of base station work.

For achieving the above object, technical scheme of the present invention specifically is achieved in that

A kind of separated base station system, this system comprises:

At least one Base Band Unit BBU, this BBU comprises: master control and clock lock unit, baseband signal processing unit, transmission unit;

At least one radio frequency unit RFU, this RFU are provided with at least one second base band radio frequency interface;

This BBU also comprises: interface unit, be used to provide and the outside mutual interface of data message that carries out, and and baseband signal processing unit between the interactive digital baseband signal, and mutual master information between the main control unit; Described interface unit further comprises: one or more first base band radio frequency interfaces; And described interface unit and master control and clock lock unit, baseband signal processing unit, transmission unit are integrated in one;

Described BBU links to each other with the second base band radio frequency interface on the RFU by its first base band radio frequency interface, and by transmitting up/downgoing baseband data and major state information between this base band radio frequency interface that links to each other and the RFU.

The described first base band radio frequency interface and the second base band radio frequency are high speed digital interface.

Described BBU is a plurality of, connects by cable between the BBU; The interface unit of described BBU also comprises one or more first dilatation interfaces, is used for transfer clock synchronizing signal, base-band information, transmission information and master information between BBU, realizes interconnection and data sharing between BBU.

The described first dilatation interface comprises: at least one provides the first dilatation interface of masterslave switchover control signal.

Described interface unit also comprises: the recognition interface that is used to identify base station site type and self-position.

Described interface unit also comprises: the passive node input interface that is used for extended base station input passive node function.

Described a plurality of BBU comprises a main BBU who works in main with state.

Described a plurality of BBU comprises that at least one works in the BBU that is equipped with of stand-by state.

Described RFU is at least with main BBU or be equipped with BBU one of them links to each other.

Described a plurality of BBU comprise at least one work in slave mode from BBU.

Described separated base station system also comprises an exchange BB box, and this exchange BB box is provided with a plurality of second dilatation interfaces, and each BBU links to each other with one second dilatation interface of exchange BB box by the first dilatation interface separately.

Described RFU is a radio frequency remote unit RRU.

Link to each other by transmission medium between described RRU and the BBU.

Described RFU is near-end RFU.

Described BBU is positioned in the free space of height more than or equal to the standard cabinet of 1U.

A kind of network-building method of separated base station system, base station system is separated into discrete Base Band Unit BBU and the radio frequency unit RFU that places, wherein, the BBU of described BBU for baseband signal processing unit, transmission unit, master control and clock lock unit and interface unit are integrated in one, the interface unit of this BBU comprises at least one first base band radio frequency interface, and described RFU is provided with at least one second base band radio frequency interface;

This method also comprises: by the first base band radio frequency interface and the second base band radio frequency interface realization BBU of RFU and linking to each other of RFU that connects BBU.

Described BBU is a plurality of BBU, and the interface unit of this BBU further comprises the first dilatation interface, and this method further comprises: the operating state that BBU is set; And each BBU linked to each other by the first dilatation interface in the described interface unit separately.

Described RFU is a plurality of RFU, and the base band radio frequency interface on this RFU is a plurality of, and this method further comprises: a plurality of RFU are continuous by the second base band radio frequency interface separately.

Described BBU is two BBU, and the operating state of the described BBU of setting is: one of them BBU is set is and work in main main BBU with state, and another BBU is set is the BBU that is equipped with that works in stand-by state;

Described each BBU is connected to by the first dilatation interface: with main BBU be equipped with BBU and link to each other by the first dilatation interface that the masterslave switchover control signal is provided.

The operating state of the described BBU of setting is: it is to work in main main BBU with state that any one BBU among a plurality of BBU is set, and be provided with remaining BBU be work in slave mode from BBU;

Described each BBU is connected to by the first dilatation interface: with main BBU with respectively link to each other by one or more first dilatation interfaces of masterslave switchover control signal that do not provide from BBU.

Described each BBU is connected to by the dilatation interface: with main BBU with respectively link to each other by one or more first dilatation interfaces of masterslave switchover control signal that provide from BBU; Main control unit shielding masterslave switchover control signal among the main simultaneously BBU.

Described each BBU links to each other by the dilatation interface and further comprises: main BBU is linked to each other by one or more first dilatation interfaces of masterslave switchover control signal that provide from BBU with each; Main control unit shielding masterslave switchover control signal among the main simultaneously BBU.

The operating state of the described BBU of setting is: any one BBU that is provided with among a plurality of BBU works in main main BBU with state, and any one BBU that is provided with among a plurality of BBU is the BBU that is equipped with that works in stand-by state, and remaining BBU be set be work in slave mode from BBU, wherein, described main BBU is not same BBU with being equipped with BBU;

Described each BBU is connected to by the first dilatation interface: with main BBU be equipped with BBU and link to each other, BBU and respectively linking to each other by one or more first dilatation interfaces of masterslave switchover control signal that do not provide fully from BBU by the first dilatation interface that the masterslave switchover control signal is provided.

Described each BBU is connected to by the first dilatation interface: with main BBU be equipped with BBU and link to each other, BBU and respectively linking to each other by one or more first dilatation interfaces of masterslave switchover control signal that provide fully from BBU by the first dilatation interface that the masterslave switchover control signal is provided; Be equipped with the main control unit shielding masterslave switchover control signal among the BBU simultaneously.

Described each BBU links to each other by the first dilatation interface and further comprises: will be equipped with BBU and link to each other by one or more first dilatation interfaces of masterslave switchover control signal that provide from BBU with each; Be equipped with the main control unit shielding masterslave switchover control signal among the BBU simultaneously.

Exist a plurality ofly from BBU, described a plurality of BBU link to each other by the first dilatation interface, further comprise: will be from linking to each other by the first dilatation interface that the masterslave switchover control signal is not provided between the BBU;

Perhaps, will link to each other from the first dilatation interface by the masterslave switchover control signal is provided between the BBU, and by two of interconnection from BBU at least one from main control unit shielding masterslave switchover control signal of BBU.

This method also comprises: the exchange BB box that a plurality of second dilatation interfaces are provided is set between BBU; The second dilatation interface of the first dilatation interface of a plurality of BBU by separately with exchange BB box is linked to each other interconnected between realization BBU.

This method further comprises: described exchange BB box is according to the operating state of each set BBU, sets up to be electrically connected between the masterslave switchover control signal of main BBU and BBU fully.

Described RFU is a radio frequency remote unit RRU, and described BBU is connected by transmission medium with RRU.

Described transmission medium is optical fiber or cable.

Described RFU is near-end RFU.

Connect by transmission medium between the described BBU.

Described transmission medium is optical fiber or cable.

A kind of Base Band Unit BBU comprises at least:

Master control and clock lock unit are used to finish in the controlled function, base station of base station the exchange of signaling and business datum between each unit, and clock signal are provided;

Baseband signal processing unit is used to finish the processing to physical layer symbols level and chip-level digital signal;

Transmission unit is connected with base station controller, and the data message of finishing between base station and the base station controller is mutual;

This BBU also comprises:

Interface unit is used to provide and the outside mutual dissimilar interface of data message that carries out, and and baseband signal processing unit between the interactive digital baseband signal, and mutual master information between the main control unit;

And described master control and clock lock unit, baseband signal processing unit, transmission unit and interface unit are integrated in one;

Wherein, described interface unit further comprises: be used to connect RFU, and and RFU between one or more first base band radio frequency interfaces of transmission up/downgoing baseband data and major state information; The power interface that is used for external power supply; Be used for debugging interface that the base station is managed and safeguards.

The described first base band radio frequency interface is a high speed digital interface.

Described debugging interface is serial ports and/or network interface.

Described recognition interface is toggle switch and/or cable ID recognition interface.

Described power interface further comprises the alarm bus interface that is used to connect the equipment with RS485 interface.

Described interface unit further comprises: at least one dilatation interface, be used for transfer clock synchronizing signal, base-band information, transmission information and master information between BBU, and realize interconnection and data sharing between BBU.

Described interface unit further comprises: the reseting interface of the base station that is used to reset;

And/or be used to identify the recognition interface of base station site type and self-position;

And/or be used to control the mains switch of self power on/off;

And/or be used for the test interface of external testing equipment;

And/or be used to receive the signal input interface of external timing signal;

And/or be used for the passive node input interface of the input passive node function of extended base station;

And/or static wrister terminal;

And/or protection ground binding post.

Described dilatation interface comprises: one or more dilatation interfaces that the masterslave switchover control signal is provided.

Described signal input interface comprises: be used to receive the signal input interface of GPS synchronizing clock signals or be used to receive the signal input interface of 2M synchronizing clock signals or both combinations.

Described test interface comprises: be used to export the 10M test interface of 10M test synchronised clock or be used to export the TTI test interface of TTI signal or both combinations.

Described Base Band Unit is positioned in the free space of height more than or equal to the standard cabinet of 1U.

Described master control and clock lock unit, baseband signal processing unit, transmission unit and interface unit are integrated on the veneer.

As seen from the above technical solution, separated base station system provided by the present invention, baseband portion is separated with radio frequency part, by being connected by the base band radio frequency interface between baseband portion Base Band Unit of forming (BBU) and the radio frequency unit of forming by radio frequency part (RFU), can adopt multiple mode to realize the dilatation of base station by dilatation interface flexible ground between the Base Band Unit, such separated base station system can reduce the floor space of base station system, cuts operating costs, improves simultaneously the reliability of base station system work.

For Base Band Unit provided by the invention, the present invention is on the basis that Base Band Unit and radio frequency unit is placed apart, further the Base Band Unit with distributed base station is the Base Band Unit with basic capacity according to capacity configuration, can be described as the baseband capabilities unit, each basic baseband capabilities unit also can be placed apart, make each baseband capabilities unit can support the minimal configuration of base station capacity, and a plurality of baseband capabilities unit combination can be supported the capacity of macro base station again together.The present invention is integrated in one all unit that comprise transmission unit, master control and clock lock unit, baseband signal processing unit and interface unit among the BBU, such as being integrated on the veneer, it highly can reach 1U even below the 1U, and this veneer is arranged at independently in the BBU box, reduced the volume and weight of BBU.Therefore, BBU of the present invention can be according to actual needs when equipment is installed, be installed in flexibly have 19 inches wide, more than or equal in the standard cabinet of 1U high spatial, macro base station transmission storehouse and other the nonstandard installing space, and can connect the discrete installation that realizes BBU by cable between a plurality of BBU.That is to say that in any standard cabinet, as long as exist the high space of 1U just can place BBU of the present invention, flexibility, practicality are higher, the I﹠M cost is lower, and the site that has solved new site effectively obtains difficulty, problems such as site rent costliness.

In addition, in the interface unit of BBU of the present invention, be provided with base band radio frequency interface that connects RFU and the dilatation interface of realizing BBU self cascade, can finish data interaction between BBU and the RFU by the base band radio frequency interface, and the multiple networking mode of realization base station, as: ring-like, star-like, chain, networking is more flexible; By the dilatation interface, cascade between a plurality of BBU of energy support and the backup of BBU, so, not only solved the little problem of small-sized BBU capacity, guarantee to increase at any time the capacity of BBU according to the needs of practical application, and, the flexibility of BBU dilatation and expansion new business characteristic strengthened, reduced cost, active and standby setting with BBU has simultaneously also improved the reliability of base station work.

Description of drawings

Fig. 1 is the composition structural representation of base station in the mobile communication system;

Fig. 2 is a separated base station system schematic network structure of the present invention;

Fig. 3 is that BBU forms structural representation in the WCDMA separated base station system of the present invention;

Fig. 4 is the interface schematic diagram of BBU of the present invention;

Fig. 5 is a BBU dilatation interface connection diagram of the present invention;

Fig. 6 is a BBU base band radio frequency interface connection diagram of the present invention;

Fig. 7 (a) is the star-like networking schematic diagram of BBU of the present invention and RRU;

Fig. 7 (b) is BBU of the present invention and RRU annular networking schematic diagram;

Fig. 7 (c) is BBU of the present invention and RRU chain networking schematic diagram;

Fig. 7 (d) is BBU of the present invention and RRU mixed networking schematic diagram;

Fig. 8 (a) is the networking structure schematic diagram of BBU and RRU networking embodiment one among the present invention;

Fig. 8 (b) is the networking structure schematic diagram of BBU and RRU networking embodiment two among the present invention;

Fig. 8 (c) is the networking structure schematic diagram of BBU and RRU networking embodiment three among the present invention;

Fig. 8 (d) is the networking structure schematic diagram of BBU and RRU networking embodiment four among the present invention;

Fig. 8 (e) is the networking structure schematic diagram of BBU and RRU networking embodiment five among the present invention;

Fig. 8 (f) is the networking structure schematic diagram of BBU and RRU networking embodiment six among the present invention;

Fig. 9 is that a plurality of BBU realize that ring connects the syndeton schematic diagram of shape networking among the present invention;

Figure 10 is the totally interconnected schematic diagram of a plurality of BBU among the present invention;

Figure 11 is the connection diagram of the totally interconnected another kind of execution mode of a plurality of BBU among the present invention.

Embodiment

Basic thought of the present invention is: the baseband portion of base station is separated with radio frequency part, form Base Band Unit (BBU, baseband Unit) and radio frequency unit (RFU, Radio Frequency Unit), and RFU is provided with BBU and connects the also base band radio frequency interface of transmitting data information, thereby forms separated base station system.And, on BBU and basis that RFU separates, further the BBU capacity is divided simultaneously, each unit is also placed apart, make each Base Band Unit can support minimal configuration, and the capacity of macro base station is combined and can be supported to a plurality of Base Band Unit.The function height is integrated designs in one with transmission unit, master control and clock lock unit, baseband signal processing unit and the interface unit etc. of BBU in the present invention, such as being integrated on the veneer, and be arranged in the very little BBU box of volume, form a Field Replaceable; The dilatation interface and the base band radio frequency interface that provide by the BBU interface unit, between the flexible realization BBU, and networking between BBU and the RFU and dilatation, and a plurality of BBU can realize backup functionality, improve the reliability of base station work, the backup that reduces the traditional base station Base Band Unit realizes cost.

The BBU of separated base station system of the present invention and the network-building method of split type base station are applicable in the multiple mobile communication standard, comprise: communication systems such as WCDMA, CDMA2000, TD-SCDMA, GSM, also being applicable to broadband wireless access (BWA) etc., is that example specifies realization of the present invention with the WCDMA system only below.

For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing preferred embodiment that develops simultaneously, the present invention is described in more detail.

Need to prove that the RFU among the present invention comprises radiofrequency signal processing unit, power amplifier unit and duplexer, be used for the conversion of radiofrequency signal and baseband signal, and the emission of radiofrequency signal.This RFU can be near-end RFU, also can be the Remote Radio Unit (RRU that links to each other with BBU by transmission mediums such as optical fiber, cables, Radio Remote Unit), be equipped with on near-end RFU and the RRU and be used for and BBU and itself interconnected base band radio frequency interface, this base band radio frequency interface can be high speed digital interface, common public radio interface (CPRI, Common Public Radio Interface) or other standard or self defined interface.Among the following embodiment, RFU all adopts RRU, also can adopt near-end RFU in actual applications, comprises that near-end RFU forms the mixed networking mode with combining of RRU.

Fig. 2 is a separated base station system schematic network structure of the present invention, and Fig. 2 has represented can carry out networking by the interface that provides separately neatly between the BBU that separates and the RFU, and wherein RFU can also be near-end RFU or RRU.Do not show the concrete dilatation interconnection mode of BBU among Fig. 2, BBU shown in Figure 2 is in actual applications interconnected, can be directly to connect by cable between the BBU, forms various forms of network topology structures; Also can be that a plurality of BBU are by increasing the exchange BB box interconnection that is provided with, form various forms of network topology structures, such as: star, chain, annular or the like, network construction form is versatile and flexible, to describe in detail in follow-up specification, the network construction form among Fig. 2 between RFU and the BBU is only for illustrating, in the practical application, its network construction form is not limited thereto, and will describe in detail in the subsequent implementation mode.Among Fig. 2, BBU links to each other with one or more near-end RFU or RRU by radio frequency interface, and is same, can form various forms of network topology structures by the interconnect interface of self between a plurality of near-end RFU or the RRU, do not show among Fig. 2 that concrete networking mode will provide in the subsequent implementation mode.Among the present invention, no matter BBU or RFU a plurality ofly are meant two or more.

Fig. 3 is that BBU forms structural representation in the WCDMA of the present invention system, main control unit among Fig. 3 and clock unit are collectively referred to as master control and clock lock unit, as shown in Figure 3, BBU of the present invention mainly comprises transmission unit, master control and clock lock unit, baseband signal processing unit and interface unit, all unit are integrated on the veneer or in other Field Replaceable, this veneer or other Field Replaceable are arranged at independently in the BBU box, the height of this BBU box can be 1U, so that be installed in flexibly as required in actual applications and have 19 inches wide, more than or equal to the high standard cabinet of 1U, in macro base station transmission storehouse and other the nonstandard installing space, this highly can difference according to actual needs change flexibly, and connects the discrete installation that realizes BBU by cable between a plurality of BBU.Wherein, 1U is the unit of measurement of a height or thickness, 1U=1.75 inch=4.45 centimetre.

Among Fig. 3, transmission unit is connected with RNC by Iub interface, the data message of finishing between BBU and the RNC is mutual, here, if the present invention is applied to other mobile communication system, then transmission unit links to each other with base station controller (BSC) in the mobile communication corresponding system by the standard interface of being used in the mobile communication system; Master control and clock lock unit are used to finish the exchange control of signaling, business datum between each unit in the controlled function of base station and the base station, provide clock reference for this BBU or according to the configuration needs for the BBU of dilatation simultaneously; Baseband signal processing unit is used to finish the processing to physical layer symbols level and chip-level digital signal, and and middle radiofrequency signal processing unit between the interactive digital baseband signal; Interface unit is used to provide various interface, support BBU and outside data interaction, such as: with the functions such as data interaction, various test and synchronised clock input between identification, BBU and the RNC of the dilatation that is connected networking, BBU, base station debugging, base station resets, base station site type and mounting groove position between the RRU, as shown in Figure 4, Fig. 4 is the interface schematic diagram of BBU of the present invention, and interface unit specifically comprises with lower interface among Fig. 4:

Power interface is used for external ac/Dc power, for the base station provides working power.

Debugging interface provides the interface of forms such as serial ports and network interface, is used to realize external equipment or attendant's administering and maintaining the base station.

Recognition interface is used to identify the site type and the BBU box groove of living in position of base station system, and according to the information of this interface input, main control unit can identify the site type and the groove position, the current place of BBU box of base station.The default groove position label that different groove position is corresponding different, different default groove position labels are used to identify the operating state of BBU, as be in main main BBU with operating state, be in the BBU fully of standby operating state or be in the subordinate operating state from BBU.This recognition interface can adopt toggle switch to realize, also can distinguish by cable ID recognition interface.In the base station system networking, the different corresponding different site types of the distribution mode of BBU, such as: the BBU of interconnection is positioned at site, same base station, or the BBU of interconnection is positioned at the corresponding different site type in different sites, base station.

Can be as the BBU of main BBU by default configuration surroundings to from BBU or be equipped with BBU and be configured, such as: specify certain or all be responsible for handling the transmission data from BBU, which subscriber channel certain is responsible for handling from BBU; Perhaps certain BBU of configuration participation networking handles data of certain RRU or the like.

Reseting interface is used for base station resets, and this interface is a reset button/switch.When pressing reset button/switch, after main control unit receives reset signal, restarting systems.

One or more base band radio frequency interfaces, each base band radio frequency interface connects a RRU, is used to receive the uplink baseband data that RRU transmits, and sends the downgoing baseband data from BBU to RRU.This base band radio frequency interface can be common public radio interface (CPRI) or other standard or self defined interface.By this base band radio frequency interface, adopt transmission mediums such as optical fiber or cable to connect BBU and RRU.This base band radio frequency interface also can be directly used in and connect near-end RFU, forms the mixed networking of local radio frequency and extension radio frequency.

Coffret is used to connect RNC, is implemented in the data of mutual base station between BBU and the RNC, and this coffret is supported multiple coffrets such as E1/T1; Also support code stream, as recovering the work clock of line clock in E1/T1 code stream, E3/T3 code stream, the STM-1 code stream etc. as BBU from multiple interfaces; When this coffret uses as atm interface, can finish the mapping of ATM cell to many kinds of coffrets of E1/T1, this interface is not limited to atm interface, also can be other protocol interfaces such as IP.

The alarm bus interface is used to connect the equipment that the RS485 interface is provided, and realizes functions such as data acquisition, such as can being connected with intelligent power, and the working condition of monitoring intelligent power supply, this interface can be built in the power interface.The alarm bus interface can be expanded by the existing interface chip, and the interface expansion belongs to known technology, no longer describes in detail here.

The passive node input interface is used for the input passive node function of extended base station, realizes the alarm detection of passive node, and the expansion of passive node input interface belongs to known technology, no longer describes in detail here.

Mains switch is used to control the power on/off of BBU.

Test interface comprises: the 10M test interface is used to export 10M test synchronised clock, to make things convenient for the join dependency tester; The TTI test interface is used to export the TTI signal, conveniently to carry out the test of radio frequency 141 agreements.

Signal input interface comprises: the gps signal input interface is used to receive the GPS synchronizing clock signals; The Bits signal input interface is used to receive the 2M synchronizing clock signals.Need to prove, on BBU, can have gps signal input interface and Bits signal input interface simultaneously, also can select wherein a kind of interface as required.

One or more dilatation interfaces, this dilatation interface comprises high speed digital interface, clock synchronization interface and masterslave switchover control interface, each dilatation interface connects a BBU, the dilatation that is used between the BBU is interconnected, realize the clock synchronization between the interconnected BBU, and between interconnected BBU, transmit base-band information, transmission information and master information etc.Wherein, base-band information comprises baseband I Q data, power control data etc., and transmission information is the relevant information that comes from RNC, and master information is the control information from main control unit.

The static wrister terminal that is used to connect the static wrister be used to be connected the protection ground binding post of protecting ground wire.

Except that above-mentioned interface, in order to show the BBU operating state, BBU interface unit of the present invention also provides various demonstration BBU the relay indicating light of operating states, is used to indicate whether power supply is normal, the BBU interface is whether normal etc., and the relay indicating light number depends on the real work needs.

In actual applications, the Interface Terminal of every kind of interface recited above on all can corresponding BBU box panel, the installation site of total interface terminal on panel can be provided with arbitrarily.

In the described in the above total interface, dilatation interface and base band radio frequency interface are the important interface that realizes BBU dilatation and networking.Fig. 5 is a BBU dilatation interface connection diagram of the present invention, as can be seen from Figure 5, when two BBU interconnection, suppose that dilatation interface place BBU is BBU1, the BBU that is connected through this dilatation interface is BBU2, then share master information, the transmission information of transmission unit, the base-band information of baseband processing unit and the master information of main control unit of main control unit by sending processing unit and reception processing unit between BBU1 and the BBU2, that is: by sending processing unit, BBU1 sends master information or transmission information or base-band information to the BBU2 direction; And by receiving processing unit, BBU1 receives major state reporting information or transmission information or the base-band information from BBU2; The dilatation interface links to each other with clock unit, realizes the clock synchronization function; Transmission/reception processing unit is connected with the dilatation interface, is mainly used in functions such as finishing conversion of signals, such as conversion between signaling protocol conversion, the signal of telecommunication and the light signal etc.

In addition, if do not have the masterslave switchover control signal between main control unit and the dilatation interface, the BBU1 that supposes dilatation interface place is set to main BBU by toggle switch, BBU2 then is set to from BBU by toggle switch, then BBU1 forms master-slave mode with BBU2 after the dilatation interface is connected, BBU1 and BBU2 are all in running order and by information sharing work, such connection has increased the capacity of BBU, have reached the purpose to the BBU dilatation.Here, this dilatation interface that does not have the masterslave switchover control signal can be called Eib dilatation interface, the Eib interface is used to transmit base-band information, transmission information, master information and clock signal.In the practical application, the Eib interface can have one or more.

If exist the masterslave switchover control signal to link to each other between main control unit and the dilatation interface, as shown in Figure 5, the BBU1 that supposes dilatation interface place is set to main BBU by toggle switch, BBU2 is set to BBU fully by toggle switch, then BBU1 forms active/standby mode with BBU2 after the dilatation interface is connected, under the normal condition, BBU1 and BBU2 are in the back-up job mode of load sharing, and BBU1 and BBU2 are by data sharing work, similar to master slave mode mode working condition, this moment, the working condition of BBU2 was basic consistent with BBU1, and just some function is provided by BBU1 as reference clock information.When the main control unit of BBU1 broke down, BBU1 was downgraded to stand-by state with oneself automatically by control masterslave switchover control signal, BBU2 detect main with BBU1 be downgraded to standby after, it is main BBU that upgrading is switched, to improve the reliability of base station work.Simultaneously, be in the Hot Spare operating state, can increase the capacity of BBU simultaneously, reach purpose the BBU dilatation because be equipped with BBU.Here, this dilatation interface with masterslave switchover control signal can be called Eia dilatation interface, the Eia interface is used to transmit base-band information, transmission information, master information, clock signal and masterslave switchover control signal.The Eia interface is compared with the Eib interface, many masterslave switchover control signals, and other class signal is seemingly.In the practical application, the Eia interface can have one or more.

By the dilatation interface, can adopt transmission mediums such as optical fiber or cable between a plurality of BBU, to connect, finish the dilatation of BBU easily.

Above-mentionedly realize that by the dilatation interface method of data sharing between a plurality of BBU is: in each BBU that participates in networking, all have CPU, be connected by UTOPIA II interface between this CPU and the logic module and realize that sharing of data between BBU, this logic module are used to realize the conversion between ATM cell or other cells and the high-speed data in interface unit.Suppose directly from RRU to receive upstream data or be source BBU from the BBU of RNC downlink data receiving directly that the BBU of up/downlink data that reception sources BBU issues is purpose BBU, the specific implementation of data sharing is so:

(1) for downlink data, after the CPU of source BBU receives data from transmission unit, according to the purpose BBU address of carrying in the data, finish the ATM function of exchange by UTOPIA II interface, the data that receive are converted to ATM cell, afterwards ATM cell is exchanged on the logic module, logic module converts the ATM cell that receives to high-speed data after the dilatation interface sends on the purpose BBU; The logic module of purpose BBU receives data and the high speed data conversion that receives is become ATM cell by the dilatation interface, send to the CPU of purpose BBU then by UTOPIA II interface, CPU is handed down to local DSP module and ASIC module after the ATM cell that receives is formed the FP frame, by the base band downlink data that obtains after the respective handling, send to RRU by the base band radio frequency interface between purpose BBU and the RRU more at last.Here, DSP module and ASIC module are positioned at baseband processing unit, and the data after the FP frame that is used for that CPU is issued is handled and will be handled are delivered to interface unit, send to RRU at last.

(2) for upstream data, the radio frequency interface of RRU between RRU and BBU sends to corresponding source BBU with the uplink baseband data, the logic module of source BBU receives after the data according to the purpose BBU address of carrying in the data, sends on the purpose BBU by the high speed interface in the dilatation interface; The logic module of purpose BBU receives data and the high speed data conversion that receives is become ATM cell by the dilatation interface, send to the CPU of purpose BBU then by UTOPIA II interface, CPU carries out the ATM cell that receives to obtain transmit ascending data after the respective handling, sends to RNC by the coffret between purpose BBU and the RNC more at last.

No matter need explanation a bit, be master slave relation between source BBU and the purpose BBU, or main and standby relation, the principle that realizes data sharing is the same, as mentioned above, uniquely different be: be between the BBU of main and standby relation and have switch function, and do not have switch function between the BBU of master slave relation.

Fig. 6 is a BBU base band radio frequency interface connection diagram of the present invention, compare with dilatation interface connection diagram shown in Figure 5, as can be seen from Figure 6, transmit the base-band information of baseband processing unit between base band radio frequency interface and the RRU that is connected through this base band radio frequency interface, that is: by sending processing unit, BBU sends base-band information to the RRU direction; By receiving processing unit, BBU receives the base-band information from RRU.Transmission/reception processing unit is connected with the base band radio frequency interface, is mainly used in functions such as finishing conversion of signals, such as format conversion between signaling protocol conversion, the signal of telecommunication and the light signal etc.By the base band radio frequency interface, can adopt transmission mediums such as optical fiber or cable between RRU, to connect, finish the networking of BBU and RRU easily.Same, this base band radio frequency interface also can connect near-end RFU, can finish function corresponding equally, can have near-end RFU and RRU according to the actual requirements simultaneously in the networking of base station system, forms the hybrid base station system.

The dilatation interface that provides among the BBU of the present invention is that dilatation and the base station networking of BBU brings great convenience, and has reduced cost, has improved the functional reliability of BBU simultaneously.Among the present invention, can form star-like networking, annular networking, chain networking or mixed type networking or the like between one or more BBU and the one or more RRU.The quantity of BBU and RRU is not limited thereto in the following networking, can plan according to practical situations.

Fig. 7 (a) is the star-like networking schematic diagram of two BBU of the present invention and three RRU, from Fig. 7 (a) as can be seen, can be connected by Eia dilatation interface between BBU1 and the BBU2, make BBU1 and BBU2 become main and standby relation, also can connect by Eib dilatation interface, making between BBU1 and the BBU2 becomes master slave relation.Be connected by the base band radio frequency interface between BBU and the RRU, each BBU can provide a plurality of base band radio frequency interfaces to RRU, such as: BBU1 among Fig. 7 (a) and BBU2 all comprise three base band radio frequency interfaces at least, so can connect three RRU respectively at least.

Fig. 7 (b) is the annular networking schematic diagram of two BBU of the present invention and four RRU, equally, if link to each other by Eib dilatation interface between BBU1 and the BBU2, then form master slave relation, BBU1 is connected by the base band radio frequency interface with a RRU, and BBU2 is connected by the base band radio frequency interface with another RRU, interconnects by the base band radio frequency interface successively between each RRU, so just looping networking between two BBU and four RRU, and the capacity of this networking this moment is two BBU capacity sums; If link to each other by Eia dilatation interface between BBU1 and the BBU2, form main and standby relation, repertoire and capacity in the time of not only can realizing by the Eib interface netting can also make this networking have backup functionality, have strengthened the reliability of whole base station work.

Fig. 7 (c) is BBU of the present invention and three RRU chain networking schematic diagrames, and the base band radio frequency interface of BBU is connected with certain RRU, connects by the corresponding interface successively between each RRU, can constitute chain networking between a BBU and three RRU like this.In this case, can carry out dilatation to BBU, also can BBU be backed up by the Eia dilatation interface of BBU by the Eib dilatation interface of BBU.

Fig. 7 (d) is two BBU of the present invention and six RRU mixed networking schematic diagrames, as shown in Fig. 7 (d), two RRU is arranged in each sector, links to each other with BBU respectively, and for each sector, RRU in each sector and BBU form looped network, supports two RRU configurations; But for a plurality of sectors, adopt star-like connection between each sector, therefore, this networking mode shown in Fig. 7 (d) is exactly a kind of implementation of mixed networking.Wherein, can main and standby relation between BBU1 and the BBU2, also can be master slave relation.

Adopting star-like networking mode with BBU with two dilatation interfaces, three base band radio frequency interfaces and RRU below is example, specifically describes the scheme of BBU and RRU realization dilatation.Here, suppose in two dilatation interfaces that one is Eia dilatation interface, one is Eib dilatation interface:

Fig. 8 (a) is the networking structure schematic diagram of a BBU and three RRU networking embodiment one among the present invention, be that a BBU is connected by three base band radio frequency interfaces respectively with three RRU shown in Fig. 8 (a), each RRU belongs to a sector, and each RRU adopts the networking configuration of single carrier, it is the networking that networking mode shown in Fig. 8 (a) is supported 3 * 1 configurations, wherein, 3 refer to three sectors, and 1 refers to single carrier.

Fig. 8 (b) is the networking structure schematic diagram of two BBU and three RRU networking embodiment two among the present invention, shown in Fig. 8 (b), link to each other by Eia dilatation interface between BBU1 and the BBU2 and form main and standby relation, BBU1 is connected with three RRU by three base band radio frequency interfaces respectively with BBU2, and each RRU belongs to a sector, and each RRU adopts the backup networking configuration of single carrier, it is the networking that networking mode shown in Fig. 8 (b) is supported 3 * 1 configurations, wherein, 3 refer to three sectors, and 1 refers to single carrier.The groove position label of supposing BBU1 is predetermined to be main BBU sign, the groove bit-identify of BBU2 is predetermined to be BBU sign fully, so, the operation principle of networking is shown in Fig. 8 (b): after the networking of finishing Fig. 8 (b), under the normal condition, BBU1 and BBU2 all are in the state of working alone, just BBU2 is in the Hot Spare operating state, realize control by the main control unit of BBU1 to whole system, realize data sharing by the dilatation interface between BBU1 and the BBU2, specifically how to realize the dilatation interface, how to realize that the data sharing front described in detail, no longer repeat here.When the main control unit of BBU1 broke down, BBU1 can be restarted automatically, simultaneously the masterslave switchover control signal was sent to BBU2, and to switch be main BBU work to BBU2 afterwards, and the main control unit of BBU2 is controlled whole system, and BBU1 reduces to BBU work fully.The operating state of each BBU after breaking down can report RNC, so that the staff carries out respective handling.

Need to prove, usually only when main control unit breaks down, realize masterslave switchover; And if baseband signal processing unit, or base band radio frequency interface, or other unit such as dilatation interface is when going wrong does not generally carry out masterslave switchover.Such as: when fault has appearred in baseband signal processing unit or base band radio frequency interface, had influence on the configuring condition of current networking, masterslave switchover is nonsensical, even this moment BBU1 is reduced to BBU fully, but communicating by letter between BBU1 and the RRU interrupted, again operate as normal.So, only need BBU to report failure condition to get final product in such cases to RNC.

Fig. 8 (c) is the networking structure schematic diagram of two BBU and three RRU networking embodiment three among the present invention, shown in Fig. 8 (c), link to each other by Eib dilatation interface between BBU1 and the BBU2, form master slave relation, BBU1 is connected with three RRU by three base band radio frequency interfaces respectively, each RRU belongs to a sector, and each RRU adopts the networking configuration of two carrier waves, and promptly networking mode described in Fig. 8 (c) is supported the networking of 3 * 2 configurations, wherein, 3 refer to three sectors, and 2 refer to two carrier waves.Owing to form master slave relation between BBU1 and the BBU2, promptly increased BBU up/the downlink data capacity, be the twice that single BBU is.

The operation principle of networking shown in Fig. 8 (c) and Fig. 8's (b) is just the same, and just no matter what's wrong for the BBU1 among Fig. 8 (c), all is to report to RNC, and do not have backup functionality.

On the basis of dilatation of above-mentioned BBU main and standby relation and the dilatation of BBU master slave relation, BBU of the present invention can also realize the flexile dilatation way of multiple network construction form, enumerates several modes below in conjunction with accompanying drawing:

Fig. 8 (d) is the networking structure schematic diagram of four BBU and six RRU networking embodiment four among the present invention, shown in Fig. 8 (d), link to each other by Eia dilatation interface between BBU1 and the BBU2, form main and standby relation, six RRU are divided into one group in twos and form main collection and diversity mode, BBU1 is connected with three main collection RRU by three base band radio frequency interfaces respectively, BBU2 is connected with three diversity RRU by three base band radio frequency interfaces respectively, per two RRU belong to a sector, this networking mode is supported three sectors, wherein each RRU adopts the backup networking configuration of two carrier waves,, promptly the networking mode shown in Fig. 8 (d) is supported the backup networking of 3 * 2 transmit diversities configuration, wherein, 3 refer to three sectors, and 2 refer to two carrier waves.

If link to each other by Eib dilatation interface between BBU1 and the BBU3, form master slave relation, link to each other by Eib dilatation interface between BBU2 and the BBU4, form master slave relation, then this networking mode is supported three sectors, and wherein each RRU adopts the backup networking configuration of two carrier waves, promptly support the backup networking of 3 * 2 transmit diversities configuration, wherein, 3 refer to three sectors, and 2 refer to two carrier waves.Here, between BBU1 and the BBU3, also can link to each other between BBU2 and the BBU4 by Eia dilatation interface, form master slave relation, in this case, will be sent to the masterslave switchover control signal of BBU3 or BBU4 by the main control unit shielding of BBU1 or BBU2, it is invalid that described shielding is meant that main control unit is made as the masterslave switchover control signal.

Fig. 8 (e) is the networking structure schematic diagram of three BBU and six RRU networking embodiment five among the present invention, shown in Fig. 8 (e), link to each other by Eia dilatation interface between BBU1 and the BBU2, form main and standby relation, link to each other by Eib dilatation interface between BBU1 and the BBU3, form master slave relation, link to each other the formation master slave relation by Eib dilatation interface between BBU2 and the BBU3; Six RRU are divided into one group in twos, BBU1 is connected with a RRU in every group by three base band radio frequency interfaces respectively, BBU2 is connected with another RRU in every group by three base band radio frequency interfaces respectively, per two RRU belong to a sector, and this networking mode is supported three sectors, and wherein every group of RRU adopts the backup networking of three carrier waves to dispose, it is the backup networking that the networking mode shown in Fig. 8 (e) is supported 3 * 3 configurations, wherein, first three sectors of 3 finger, second 3 refers to three carrier waves.

Fig. 8 (f) is the networking structure schematic diagram of four BBU and six RRU networking embodiment six among the present invention, shown in Fig. 8 (f), links to each other by Eia dilatation interface between BBU1 and the BBU2, forms main and standby relation; Link to each other by Eib dilatation interface between BBU1 and the BBU3, form master slave relation; Link to each other by Eib dilatation interface between BBU2 and the BBU4, form master slave relation; Link to each other by Eia dilatation interface between BBU3 and the BBU4, form master slave relation, need to prove, masterslave switchover control interface conductively-closed by Eia dilatation interface between this moment BBU3 and the BBU4.Six RRU are divided into one group in twos and form main collection and diversity mode, BBU1 is connected with three main collection RRU by three base band radio frequency interfaces respectively, BBU2 is connected with three diversity RRU by three base band radio frequency interfaces respectively, this networking mode is supported three sectors, wherein each RRU adopts the backup networking configuration of four carrier waves, and promptly the networking mode shown in Fig. 8 (f) is supported the backup networking of 3 * 4 transmit diversities configuration, wherein, 3 refer to three sectors, and 4 refer to four carrier waves.

Only, also exist different dilatation ways between a plurality of BBU, illustrate one by one below in conjunction with accompanying drawing at BBU.

Fig. 9 is that four BBU realize that ring connects the syndeton schematic diagram of shape networking among the present invention, is connected by Eia dilatation interface between BBU1 and the BBU2, makes between BBU1 and the BBU2 to constitute main and standby relation; Between BBU1 and the BBU3, between BBU2 and the BBU4, be connected by Eia dilatation interface respectively between BBU3 and the BBU4, make to constitute between BBU1 and the BBU3 to constitute between master slave relation, BBU2 and the BBU4 between master slave relation, BBU3 and the BBU4 to constitute from relation.The dilatation interface of supposing each BBU among Fig. 9 is an Eia dilatation interface and an Eib dilatation interface, to between BBU3 and BBU4, constitute master slave relation, can connect by the Eia interface and finish, just the main control unit of BBU3 shielding at this moment gets final product to the masterslave switchover control signal that connects the transmission of BBU4 dilatation interface; Perhaps can in BBU3 and BBU4, realize by increasing an Eib interface.

In the BBU interconnect scheme in Fig. 9, can be between each BBU by the connection between transmission mediums such as cable or the optical fiber realization dilatation interface, the base station system capacity increases along with the increase of BBU quantity.This group of ring mode can be used fewer purpose dilatation interface to realize data sharing between BBU, and provide looped network intrinsic route protection function.

Figure 10 is the totally interconnected schematic diagram of a plurality of BBU among the present invention, and each BBU among Figure 10 all should possess an Eia interface and a plurality of Eib interface respectively at least, is connected by Eia dilatation interface between BBU1 and the BBU2, makes between BBU1 and the BBU2 to constitute main and standby relation; Connect by the dilatation interface Eia that supports masterslave switchover between BBU3 and the BBU4, but the conductively-closed of masterslave switchover function only realizes the information sharing between BBU3 and the BBU4, does not possess the masterslave switchover function; Between BBU1 and the BBU3, between BBU2 and the BBU4, between BBU1 and the BBU4, all be connected between BBU2 and the BBU3 by Eib dilatation interface.Each BBU among Fig. 9 all should possess an Eia interface and two or more Eib interfaces respectively at least as can be seen.

In the totally interconnected scheme of BBU in Figure 10, can be between each BBU by the connection between transmission mediums such as cable or the optical fiber realization dilatation interface, the base station system capacity increases along with the increase of BBU quantity.

Figure 11 is the connection diagram of the totally interconnected another kind of execution mode of four BBU among the present invention, among Figure 11, between four BBU, increase and be provided with an exchange BB box, each BBU realizes interconnection by this exchange BB box, this exchange BB box provides a plurality of dilatation interfaces that dock with the dilatation interface of BBU, exchange BB box is according to the character of the groove position label difference different B BU of each BBU, and at main BBU and the electrical connection of setting up the masterslave switchover control signal fully between the BBU; And main BBU and between the BBU, be equipped with BBU with between the BBU, from BBU with link to each other from the electricity that does not need between the BBU to set up the masterslave switchover control signal, and the data interaction between them is transmitted by exchange BB box, and exchange BB box can forward the data on the corresponding BBU according to the purpose BBU address of carrying in the data.

In the totally interconnected scheme of four BBU, can pass through the connection between the transmission mediums realization dilatation interfaces such as cable or optical fiber between each BBU in Figure 11, the base station system capacity increases along with the increase of BBU quantity.Exchange BB box is responsible for carrying out the exchange of data between each BBU, the information forwarding that realizes point-to-point or put multiple spot.Be not difficult to find out, increase, when networking is complicated more,, significantly reduced the upward number of dilatation interface of BBU, reduce the cost of single BBU by exchange BB box in BBU quantity.

BBU among the present invention divides the baseband portion of base station according to capacity, be split into the low capacity Base Band Unit of a plurality of flexible expansion,, can do volume very little because the capacity of each Base Band Unit is little, be placed on the place of limited space flexibly, reach the purpose of " stealthy "; Dilatation interface by BBU simultaneously also can be realized interconnected between a plurality of BBU, and the system that makes realizes the capacity of macro base station.Compare with macro base station, BBU of the present invention integrates master control, base band and transmission, and goes out master control, base band and coffret simultaneously on a box-shaped device, has reduced volume and weight, has expanded the range of application of equipment; Compare with little base station, BBU of the present invention is except integrating master control base band and hop, and the interface that also provides interconnect extended to use can be realized the expansion and the stack of baseband portion, realize the capacity of macro base station, further expanded the range of application of little base station.

From technical scheme provided by the present invention as can be seen, BBU of the present invention can realize the distributing installation by miniaturization Design, as long as there has been the site, base station in original mobile communication carrier, just can directly utilize remaining space or the rack of indoor macro base station machine room or the remaining space of frame in its outdoor macro base station, BBU of the present invention is installed, do not need the extra base station selection that is, simultaneously, because device miniaturization disperses to install, make mobile communication carrier can shorten the time of networking greatly, realize quick networking.

BBU box of the present invention is a self-contained unit, has both solved that traditional base station volume is big, the big existing installation of weight is complicated, and load-bearing requires high, the installation cost problem of higher; Evade little base station/little base station again and be unfavorable for the drawback of dilatation, and the problem of baseband processing unit and RFU upgrading.

Among the present invention; each BBU provides the coffret function; inner each functional module formed distributed treatment when a plurality of BBU interconnected; base band radio frequency interface by BBU can be realized various forms of networkings with RRU or near-end RFU; the whole system each several part all has protection mechanism, and framework is succinct, is easy to realize backup; and backup cost is low, has satisfied the requirement of following telecommunication apparatus to the base station reliability well.

Realization of the present invention can also make full use of operator equipment of having bought and the address, base station that obtains, and makes its further performance benefit, reduces following the investment.Mobile communication carrier can realize Multi-Mode Base Station on site, original base station and base station equipment thereof, make operator can make full use of original investment, and existing equipment space and power supply etc. are made full use of, and reduces overlapping investment.

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims

1. separated base station system, this system comprises:

It is characterized in that this BBU also comprises: interface unit, be used to provide and the outside mutual interface of data message that carries out, and and baseband signal processing unit between the interactive digital baseband signal, and mutual master information between the main control unit; Described interface unit further comprises: one or more first base band radio frequency interfaces; And described interface unit and master control and clock lock unit, baseband signal processing unit, transmission unit are integrated in one;

2. separated base station system according to claim 1 is characterized in that, the described first base band radio frequency interface and the second base band radio frequency are high speed digital interface.

3. separated base station system according to claim 1 is characterized in that, described BBU is a plurality of, connects by cable between the BBU; The interface unit of described BBU also comprises one or more first dilatation interfaces, is used for transfer clock synchronizing signal, base-band information, transmission information and master information between BBU, realizes interconnection and data sharing between BBU.

4. separated base station system according to claim 3 is characterized in that, the described first dilatation interface comprises: at least one provides the first dilatation interface of masterslave switchover control signal.

5. separated base station system according to claim 3 is characterized in that, described interface unit also comprises: the recognition interface that is used to identify base station site type and self-position.

6. separated base station system according to claim 3 is characterized in that, described interface unit also comprises: the passive node input interface that is used for extended base station input passive node function.

7. separated base station system according to claim 3 is characterized in that, described a plurality of BBU comprise a main BBU who works in main with state.

8. separated base station system according to claim 7 is characterized in that, described a plurality of BBU comprise that at least one works in the BBU that is equipped with of stand-by state.

9. separated base station system according to claim 8 is characterized in that, described RFU is at least with main BBU or be equipped with BBU one of them links to each other.

10. separated base station system according to claim 7 is characterized in that, described a plurality of BBU comprise at least one work in slave mode from BBU.

11. separated base station system according to claim 3, it is characterized in that, described separated base station system also comprises an exchange BB box, and this exchange BB box is provided with a plurality of second dilatation interfaces, and each BBU links to each other with one second dilatation interface of exchange BB box by the first dilatation interface separately.

12. separated base station system according to claim 1 is characterized in that, described RFU is a radio frequency remote unit RRU.

13. separated base station system according to claim 12 is characterized in that, links to each other by transmission medium between described RRU and the BBU.

14. separated base station system according to claim 1 is characterized in that, described RFU is near-end RFU.

15., it is characterized in that described BBU is positioned in the free space of height more than or equal to the standard cabinet of 1U according to each described separated base station system of claim 1 to 14.

16. the network-building method of a separated base station system, it is characterized in that, base station system is separated into discrete Base Band Unit BBU and the radio frequency unit RFU that places, wherein, the BBU of described BBU for baseband signal processing unit, transmission unit, master control and clock lock unit and interface unit are integrated in one, the interface unit of this BBU comprises at least one first base band radio frequency interface, and described RFU is provided with at least one second base band radio frequency interface;

17. method according to claim 16 is characterized in that: described BBU is a plurality of BBU, and the interface unit of this BBU further comprises the first dilatation interface, and this method further comprises: the operating state that BBU is set; And each BBU linked to each other by the first dilatation interface in the described interface unit separately.

18. method according to claim 16 is characterized in that: described RFU is a plurality of RFU, and the base band radio frequency interface on this RFU is a plurality of, and this method further comprises: a plurality of RFU are continuous by the second base band radio frequency interface separately.

19. method according to claim 17, it is characterized in that, described BBU is two BBU, and the operating state of the described BBU of setting is: one of them BBU is set is and work in main main BBU with state, and another BBU is set is the BBU that is equipped with that works in stand-by state;

20. method according to claim 17 is characterized in that, the operating state of the described BBU of setting is: it is to work in main main BBU with state that any one BBU among a plurality of BBU is set, and be provided with remaining BBU be work in slave mode from BBU;

21. method according to claim 17 is characterized in that, the operating state of the described BBU of setting is: it is to work in main main BBU with state that any one BBU among a plurality of BBU is set, and be provided with remaining BBU be work in slave mode from BBU;

22. method according to claim 20 is characterized in that, described each BBU links to each other by the dilatation interface and further comprises: main BBU is linked to each other by one or more first dilatation interfaces of masterslave switchover control signal that provide from BBU with each; Main control unit shielding masterslave switchover control signal among the main simultaneously BBU.

23. method according to claim 17, it is characterized in that, the operating state of the described BBU of setting is: any one BBU that is provided with among a plurality of BBU works in main main BBU with state, and any one BBU that is provided with among a plurality of BBU is the BBU that is equipped with that works in stand-by state, and remaining BBU be set be work in slave mode from BBU, wherein, described main BBU is not same BBU with being equipped with BBU;

24. method according to claim 17, it is characterized in that, the operating state of the described BBU of setting is: any one BBU that is provided with among a plurality of BBU works in main main BBU with state, and any one BBU that is provided with among a plurality of BBU is the BBU that is equipped with that works in stand-by state, and remaining BBU be set be work in slave mode from BBU, wherein, described main BBU is not same BBU with being equipped with BBU;

25. method according to claim 23 is characterized in that, described each BBU links to each other by the first dilatation interface and further comprises: will be equipped with BBU and link to each other by one or more first dilatation interfaces of masterslave switchover control signal that provide from BBU with each; Be equipped with the main control unit shielding masterslave switchover control signal among the BBU simultaneously.

26. according to each described method of claim 20 to 25, it is characterized in that, exist a plurality ofly from BBU, described a plurality of BBU link to each other by the first dilatation interface, further comprise: will be from linking to each other by the first dilatation interface that the masterslave switchover control signal is not provided between the BBU;

27. method according to claim 17 is characterized in that, this method also comprises: the exchange BB box that a plurality of second dilatation interfaces are provided is set between BBU; The second dilatation interface of the first dilatation interface of a plurality of BBU by separately with exchange BB box is linked to each other interconnected between realization BBU.

28. method according to claim 27 is characterized in that, this method further comprises: described exchange BB box is according to the operating state of each set BBU, sets up to be electrically connected between the masterslave switchover control signal of main BBU and BBU fully.

29., it is characterized in that described RFU is a radio frequency remote unit RRU according to the described method of claim 16 to 25, described BBU is connected by transmission medium with RRU.

30. method according to claim 29 is characterized in that, described transmission medium is optical fiber or cable.

31., it is characterized in that described RFU is near-end RFU according to the described method of claim 16 to 25.

32. according to the described method of claim 18 to 28, it is characterized in that, connect by transmission medium between the described BBU.

33. method according to claim 32 is characterized in that, described transmission medium is optical fiber or cable.

34. a Base Band Unit BBU comprises at least:

It is characterized in that this BBU also comprises:

35. Base Band Unit according to claim 34 is characterized in that, the described first base band radio frequency interface is a high speed digital interface.

36. Base Band Unit according to claim 34 is characterized in that, described debugging interface is serial ports and/or network interface.

37. Base Band Unit according to claim 34 is characterized in that, described recognition interface is toggle switch and/or cable ID recognition interface.

38. Base Band Unit according to claim 34 is characterized in that, described reseting interface is button or switch.

39. Base Band Unit according to claim 34 is characterized in that, described power interface further comprises the alarm bus interface that is used to connect the equipment with RS485 interface.

40. Base Band Unit according to claim 34, it is characterized in that, described interface unit further comprises: at least one dilatation interface, be used for transfer clock synchronizing signal, base-band information, transmission information and master information between BBU, and realize interconnection and data sharing between BBU.

41., it is characterized in that described interface unit further comprises according to the described Base Band Unit of claim 40: the reseting interface of the base station that is used to reset;

And/or be used to control the mains switch of self power on/off;

And/or be used for the test interface of external testing equipment;

And/or be used to receive the signal input interface of external timing signal;

And/or static wrister terminal;

And/or protection ground binding post.

42., it is characterized in that described dilatation interface comprises according to the described Base Band Unit of claim 40: one or more dilatation interfaces that the masterslave switchover control signal is provided.

43., it is characterized in that described signal input interface comprises according to the described Base Band Unit of claim 41: be used to receive the signal input interface of GPS synchronizing clock signals or be used to receive the signal input interface of 2M synchronizing clock signals or both combinations.

44., it is characterized in that described test interface comprises according to the described Base Band Unit of claim 41: be used to export the 10M test interface of 10M test synchronised clock or be used to export the TTI test interface of TTI signal or both combinations.

45., it is characterized in that described Base Band Unit is positioned in the free space of height more than or equal to the standard cabinet of 1U according to each described Base Band Unit of claim 34 to 44.

46., it is characterized in that described master control and clock lock unit, baseband signal processing unit, transmission unit and interface unit are integrated on the veneer according to each described Base Band Unit of claim 34 to 44.