CN104244470A - Multi-standard base station, signal transceiving method thereof and wireless communication network - Google Patents
Multi-standard base station, signal transceiving method thereof and wireless communication network Download PDFInfo
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Abstract
The invention relates to the field of wireless communication and discloses a multi-standard base station, a signal transceiving method thereof and a wireless communication network. Multi-standard first switching buses are connected with baseband single boards and radio frequency units corresponding to the baseband single boards, and various standards of baseband single boards can be inserted in a mixed mode to form the multi-standard base station due to the fact that the first switching buses are compatible with various standards of IQ data. Synchronization information including frame numbers required by various standards and the like forms a synchronous burst through multiplex framing, and the same system clock is adopted, so that the synchronous burst and the system clock can be transmitted to the various standards of baseband single boards through the same synchronous clock bus. A shared public module provides master control and transmission functions for all the baseband single boards in the base station in a unified mode. Filling and synchronization of various different standards of wireless IQ data can be achieved through a common multiple relational mapping mode.
Description
Technical field
The present invention relates to wireless communication field, particularly multi-standard base station technology.
Background technology
In recent years, the development of the communication technology, especially mobile communication technology is very rapid, the first to 3G (Third Generation) Moblie (The Third Generation, be called for short " 3G ") the releasing one after another of system, the impact of mobile communication on human lives and work is increased day by day.Current mobile subscriber's quantity is in continuous growth, the kind of mobile service is also more and more rich and varied, in the face of the market that this is constantly expanded, the business that each large mobile operator in the whole world tries hard to by providing New Schemes rapidly, attract and catch mobile subscriber, occupying favourable competition situation in the market by this.
At present, the base band veneer of different standards can be inserted in the same base band frame of base station, to form multi-standard base station.The method realized is in advance for different standards distributes fixing slot.Such as, for Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, be called for short " WCDMA ") standard distribution the 1st to the 4th slot, for global system for mobile communications (Global System for Mobile communication is called for short " GSM ") standard distributes the 5th to the 8th slot.In different standards, the radio-frequency line that base band veneer is connected to radio frequency unit is dissimilar.Because the standard of slot secures, so the radio-frequency line from veneer to radio frequency unit can be arranged according to the standard of each slot respectively.
But the fixed allocation of slot standard brings new problem, namely usually cannot the Accurate Prediction in the future ratio of various standard in base band frame, cause the slot of some standard during dilatation inadequate, and the unserviceable situation in the slot of other standards.
Mixed insertion refers to that the base band veneer of each standard can be inserted into arbitrary slot, because be that different standards distributes fixing slot in advance in prior art, so cannot realize mixed insertion, cannot make full use of the slot resource in base band frame.
Summary of the invention
The technical problem underlying that each execution mode of the present invention will solve is to provide a kind of multi-standard base station and signal transmit-receive method thereof and cordless communication network.
For solving the problems of the technologies described above, embodiments of the present invention provide a kind of multi-standard base station, comprise at least one radio frequency unit, also comprise,
Belong at least two pieces of base band veneers of at least two kinds of standards respectively;
First switching bus, for being connected to corresponding radio frequency unit in the mode of each standard of compatibility by each base band veneer.
Embodiments of the present invention additionally provide a kind of sending method of multi-standard base station, comprise following steps:
Each base band veneer of different systems carries out Base-Band Processing to descending data respectively and generates I/Q data, outputs to the first switching bus;
I/Q data from each base band veneer, in the mode of each standard of compatibility, is transferred to after corresponding radio frequency unit carries out radio frequency processing and sends by the first switching bus respectively.
Embodiments of the present invention additionally provide a kind of method of reseptance of multi-standard base station, comprise following steps:
Each RF processing unit generates the I/Q data of different systems after respectively upward signal being carried out radio frequency processing, output to the first switching bus;
I/Q data from each RF processing unit, in the mode of each standard of compatibility, is transferred to after corresponding each base band veneer carries out Base-Band Processing and transmits to up direction by the first switching bus respectively.
Embodiments of the present invention additionally provide a kind of wireless communication system, comprise at least one multi-standard base station as described above in this system.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, the first switching bus is used to connect the radio frequency unit of each base band veneer and its correspondence, utilize the first switching bus to the compatibility of various standard I/Q data, make the base band veneer of different systems can mixed insertion and form multi-standard base station.
The synchronizing informations such as the frame number needed for various standard are formed Synchronization Burst (burst) by multiplexing framing by the present invention, and adopt same system clock, so can Synchronization Burst and system clock a set of synchronised clock bus be sent the base band veneer of various standard to, thus the cabling decreased on backboard, reduce cost simultaneously.
There is provided master control and transfer function by the public module shared each base band veneer in base station is unified, and in prior art, each base band veneer uses the master control and transmission of controlling oneself separately.By sharing, a set of parts can be shared at multiple base band veneer and master control and transmission are provided, reducing cost.By sharing, when expanding in base station, the base band veneer newly added no longer needs independently master control and transmission part, reduces expansion cost.
The various modes such as chain, star-like, bus-type, ring-like, crossover can be passed through interconnected between public module and each base band veneer, thus flexibility when adding actual disposition base station.
Realize for the filling of the wireless I/Q data of multiple different systems and synchronous by common multiple relationship map mode, general-purpose interface is made to be applicable to multiple types type, enhance interface compatibility, improve the flexibility ratio of wireless transmission, simplify wave point transmission mechanism.
Realized the transmission of multiple different systems business datum at the fixing mapping mode of the basic frame of radio frequency interface by the I/Q data of different base band veneer and radio frequency unit or different systems wireless traffic, realize the as far as possible uniform of data transfer rate by the uniform mapping as far as possible of I/Q data to transmit, the system of guarantee has good delay performance.
Accompanying drawing explanation
Fig. 1 is the logical architecture schematic diagram of multi-standard base station of the present invention;
Fig. 2 is the multi-standard base station structural representation according to first embodiment of the invention;
Fig. 3 is the block diagram of the device of transmission clock synchronizing signal in the multi-standard base station according to first embodiment of the invention;
Fig. 4 is the block diagram of the multi-frame generation module in the multi-standard base station according to first embodiment of the invention in synchronous burst generation module;
Fig. 5 is multi-modulation scheme universal timepiece bus schematic diagram in the multi-standard base station according to first embodiment of the invention;
Fig. 6 is base band veneer and the interconnected schematic diagram of public module chain in the multi-standard base station according to first embodiment of the invention;
Fig. 7 is base band veneer and the star-like interconnected schematic diagram of public module in the multi-standard base station according to first embodiment of the invention;
Fig. 8 is base band veneer and the interconnected schematic diagram of public module bus-type in the multi-standard base station according to first embodiment of the invention;
Fig. 9 is base band veneer and the ring-like interconnected schematic diagram of public module in the multi-standard base station according to first embodiment of the invention;
Figure 10 is base band veneer and the interconnected schematic diagram of public module crossover in the multi-standard base station according to first embodiment of the invention;
Figure 11 is the sending method flow chart of the multi-standard base station according to second embodiment of the invention;
Figure 12 is the method for reseptance flow chart of the multi-standard base station according to third embodiment of the invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
In each execution mode of the present invention, the logical architecture of base station is substantially constant, as shown in Figure 1, can be divided into chain of command and user face, and comprise the several functional modules shown in Fig. 1 alternatively.Its key is, the first switching bus is used to connect the radio frequency unit of each base band veneer and its correspondence, utilize the first switching bus to the compatibility of various standard I/Q data, make the base band veneer (BBP) of different systems can mixed insertion and form multi-standard base station.
Be described first embodiment of the invention below, present embodiment relates to a kind of multi-standard base station, as shown in Figure 2, comprises at least one radio frequency unit; Belong to the polylith base band veneer of multiple two kinds of standards respectively; With the first switching bus (IDX2), for each base band veneer being connected to radio frequency unit in the mode of the above-mentioned each standard of compatibility.
Wherein, the standard of base band veneer comprises: global system for mobile communications (Global System for mobile Communication, be called for short " GSM ") standard, code division multiple access (Code Division Multiple Access, be called for short " CDMA ") standard, micro-wave access to global intercommunication (Worldwide Interoperability for Microwave Access, be called for short " WiMAX ") standard, Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, be called for short " WCDMA ") standard, TD SDMA (Time Division Synchronous CodeDivision Multiple Access SCDMA, be called for short " TD-SCDMA ") standard, CDMA 2000 (Code Division Multiple Access 2000, be called for short " CDMA2000 ") standard, personal handyphone system (Personal Handyphone System, be called for short " PHS ") standard, cluster standard, Long Term Evolution (Long Term Evolution, be called for short " LTE ") standard, AIE standard etc.
Each base band veneer of this base station is when processing miscellaneous service, usually clock sync signal is needed as a reference, clock sync signal comprises system clock, frame timing cycle signal and base station frame number (Base transceiver station Frame Number, be called for short " BFN "), can further include temporal information.System clock is usually used as timing reference input during each base band veneer process business; Frame timing cycle signal is generally used for representing the frame period; Frame number is generally used for locating concrete business datum, and frame timing cycle signal and frame number coordinate the position being used for representing concrete business datum.In multi-standard base station, the base band veneer of different systems can adopt identical system clock, but the frame timing cycle signal of different systems base band veneer is different, such as, the frame timing cycle of GSM is 4.615 milliseconds (namely 60/13 milliseconds), and the frame timing cycle of WCDMA is 10 milliseconds.Similarly, the frame number figure place of different systems base band veneer also may be different, and such as, the frame number figure place of WCDMA is 12, and the frame number figure place of GSM is 22.In addition, the standards such as picture CDMA2000, TD-SCDMA, also need gps time equal time information synchronous to what realize in network between each base station, therefore, in the design that the clock sync signal of the multi-standard base station supporting these standards transmits, also need base band veneer temporal information being sent to these standards.
In the present embodiment, clock signal is provided to each base band veneer is unified by public module, this public module by time kind bus be connected with the base band veneer of the variant standard in same multi-standard base station, recover the clock sync signal needed for this standard the system clock that the base band veneer of variant standard sends from clock bus and Synchronization Burst (burst).
Below, comprise two pieces of base band veneers of GSM and WCDMA two kinds of standards for this multi-standard base station, be described in detail.
Synchronous burst is exactly the form transmission relevant synchronised clock information being adopted burst, and this burst is periodic.Here, consider that the frame timing cycle of WCDMA is 10 milliseconds, simultaneously also simple in order to what process, the cycle of burst is set to 10 milliseconds.Certainly, also the cycle of burst can be arranged to other numerical value, such as 20 milliseconds etc.In this synchronous burst, provide the frame number and temporal information etc. needed for various standard according to set form.Particularly, see table 1, table 1 illustrates the frame format of burst, and the unit in table 1 is bit (bit).
Table 1
As shown in table 1, in table 1, first row and last row are start bit and the stop bits of burst respectively, and they take 1bit respectively, and start bit can be high level " 1 "; Stop bits can be low level " 0 ".
Secondary series in table 1 is standard number, takies 8bit, and its value represents the number of the standard that this multi-standard base station is supported.In the present embodiment, multi-standard base station comprises GSM and WCDMA two kinds of standards two pieces of base band veneers, and therefore, the number of standard is 2, is double-standard base station.
Next, in table 1, from type to cyclic redundancy check (CRC), 4 list items of (Cyclic Redundancy Check is called for short " CRC ") are total to 88bit, are one group, as a kind of multi-frame of standard, represent a kind of synchronizing information content of standard, in the present embodiment using the multi-frame of this group as WCDMA, in this 88bit, initial 8bit represents type, represent standard, such as, the standard of WCDMA FDD (R6) can be represented with 01h; Middle 64bit represents the content of the type, and wherein a bit represents whether this standard is effective in 10 millisecond periods of burst, can represent effective, setting to 0 to represent invalid by putting 1; Other 63bit represents the frame number of this standard, because the frame number figure place of WCDMA is 12, so represent that the 63bit of frame number enough represents the frame number of WCDMA; The last 16bit of each group is the check value of CRC, is the CRC check to this group 72bit above.4 list items below altogether 88bit are second group, the same with the 88bit of first group, only the multi-frame of alternatively standard, and representing the information of other standard, is namely the information of GSM standard in the present embodiment.
In Table 1, also comprising last group 88bit, as temporal information frame, being used for representing temporal information (Time Of Day is called for short " TOD "), for representing the timing informations such as the GPS absolute time of the standards such as CDMA2000.Type can represent with 70h, and the specific definition of temporal information is as shown in table 2.
Table 2
In the present embodiment, because base station is the double-standard base station supporting GSM and WCDMA, GSM and WCDMA does not need time synchronized, so do not need gps time, so, set to 0 in the whether effectively list item of this group, represent invalid, when base station support CDMA2000 etc. needs the standard of GSP time, can be used for representing effectively at the list item of correspondence mid-1; Next, the free time goes out 15bit; In TOD detailed content, what represent transmission with the 01h of 8bit is gps time; The 8bit of jump second represents the difference number of seconds between Current GPS time and universal coordinated time (Universal Time Coordinated is called for short " UTC "), and UTC is the zebra time of standard, i.e. GMT; In gps time, represent the number of seconds of the gps time from 6 days January in 1980 with 32bit.So, in burst, comprise the TOD information shown in table 2, multi-standard base station support can be made to need the standard of gps time.
The frame format of table 1 synchronous burst under only providing double-standard base station case, when multi-standard base station supports two or more standards, only need the frame format according to the burst shown in table 1, by software merit rating in the end one group represent the list item increasing corresponding expression standard temporal information before.Similarly, also can delete the list item representing standard, meet the needs of single system base station.
Below in conjunction with Fig. 3, the public module of transmission clock synchronizing signal in multi-standard base station is described.As can see from Figure 3, the public module of transmission clock synchronizing signal comprises synchronous burst generation module and system clock generation module further, system clock in multi-standard base station clock sync signal is produced by system clock generation module, and the synchronizing information such as frame number, temporal information corresponding to various standard in clock sync signal produces by synchronous burst generation module is unified.
System clock generation module is used for the system clock needed for the clock reference generation double-standard base station of input.The synchronous burst that one tunnel and the synchronous burst generation module of system clock generate is together as clock sync signal, and be input to each base band veneer by same clock bus, another road is input to synchronous burst generation module.Due to clock reference when system clock is base band veneer process business, base band veneer operationally also needs to recover work clock from system clock, so here, base band veneer for various standard adopts same system clock, the system clock produced through system clock generation module to be input to the base band veneer of various standard by same clock bus, recover the work clock self needed by base band veneer through process such as phase-locked loops.System clock generation module can be realized by the various software and hardwares cooperations for generation of system clock in prior art, such as phase-locked loop, phase demodulation module, filtered Software etc.The clock reference of input can be the timing reference input inputted outside base station, such as radio network controller (Radio Network Controller, be called for short " RNC ") export, when there being the standard needing gps time, can also using gps time as timing reference input.
The system clock that synchronous burst generation module is used for producing according to system clock generation module generate comprise base station support the synchronous burst of the synchronizing information of standard, synchronous burst is input to each base band veneer by same clock bus together with system clock.In the present embodiment, synchronous burst generation module comprises the first frequency divider, WCDMA multi-frame generation module, GSM multi-frame generation module, temporal information frame generation module and multiplexing framing module.
The system clock that first frequency divider is used for system clock generation module produces carries out frequency division, separates the cycle of synchronous burst, is exemplified as 10 milliseconds here.Cycle of synchronous burst except as except reference sending synchronous burst, also in multi-frame generation module as the reference data of various multiframe period and judge various standard whether effectively benchmark.
Multi-frame generation module is used for the cycle of the synchronous burst produced according to the first frequency divider, produces also output packet and contains the multi-frame of various standard synchronizing information.Specifically WCDMA multi-frame generation module and GSM multi-frame generation module in present embodiment.
Referring to Fig. 4, multi-frame generation module is described.Multi-frame generation module shown in Fig. 4 comprises the second frequency divider, the effective judge module of standard, counter, CRC check module and framing module.
Second frequency divider is used for producing signal multiframe period according to the periodic signal of synchronous burst.For WCDMA multi-frame generation module, frame timing cycle due to WCDMA is 10 milliseconds, the cycle of synchronous burst is 10 milliseconds, in the cycle of synchronous burst, WCDMA is effective all the time, so WCDMA is also 10 milliseconds multiframe period, the second frequency divider is for generation of WCDMA multiframe period of 10 milliseconds.For GSM multi-frame generation module, the frame timing cycle of GSM is 60/13 millisecond, the cycle of synchronous burst is 10 milliseconds, when the cycle of the 6th synchronous burst, GSM is just effective, so the multiframe period of GSM is 60 milliseconds, the i.e. least common multiple in self frame timing cycle and synchronous burst cycle, the second frequency divider is for generation of GSM multiframe period of 60 milliseconds.Signal multiframe period that second frequency divider separates exports the effective judge module sum counter of standard respectively to.
The effective judge module of standard be used for according to the periodic signal of synchronous burst and multiframe period signal whether judge to produce the standard of multi-frame effective, and export judged result to CRC check module and framing module.For WCDMA multi-frame generation module, the cycle of synchronous burst is equal with the multiframe period of WCDMA, so in each synchronous burst cycle, WCDMA standard is effective all the time, and judged result is always 1.For GSM multi-frame generation module, every six synchronous burst cycles are just equal with the multiframe period of GSM, so every six synchronous burst cycles, GSM standard is just effective, and time invalid, judged result sets to 0.
Counter is used for by producing frame number to carrying out counting multiframe period, and the frame number that counter produces exports CRC check module and framing module respectively to.For WCDMA multi-frame generation module, multiframe period is equal with self frame timing cycle, counter increases progressively until reach the figure place of WCDMA frame number with 1, namely often input in counter one multiframe period signal, counter just adds 1, and export as frame number, until count down to the frame number figure place of WCDMA, more again circulate.For GSM multi-frame generation module, multiframe period that is 60 milliseconds, 13 self frame timing cycles that is 60/13 millisecond, so counter increases progressively until reach the figure place of GSM frame number with 13, namely often input GSM signal multiframe period in counter, counter just adds 13, and exports as frame number, until count down to the frame number figure place of GSM, more again circulate.
CRC check module be used for system types, standard whether effectively and frame number carry out CRC check, and output verification value is to framing module.Wherein standard whether effectively and frame number come from the output of the effective judge module sum counter of standard respectively, system types is then pre-configured according to the design of multi-standard base station, because when designing the transmission of double-standard base station clock synchronization signal, just known needs supports WCDMA and GSM standard in advance, so when will form multi-frame, pre-configured 01h and 04h representing WCDMA and GSM standard is respectively input to CRC check module and framing module.
Result, the frame number of counter output and the check value of CRC check module output that framing module is used for system types, the effective judge module of standard export arrange, form the multi-frame in form as shown in table 1, and export multi-frame to multiplexing framing module according to the periodic signal of 10 milliseconds.
The standard of information when required, such as, during CDMA2000, also needs the support of GPS, now by temporal information frame generation module generation time information frame.Temporal information frame generation module is used for producing the temporal information frame of form as shown in Table 1 and Table 2 according to cycle of synchronous burst and gps time information.Now, can using unified for the GPS timing reference input as base station.
The multi-frame of the corresponding standard that the multi-frame generation module of various standard produces is input in multiplexing framing module.Because the start bit of synchronous burst and stop bits are fixing, and at the beginning of the design of multi-standard base station, know the standard that multi-standard base station is supported in advance, so standard number also can be pre-configured.Multiplexing framing module is used for the multi-frame of input and fixing start bit, stop bits and pre-configured standard number to line up, and forms synchronous burst as shown in table 1.When existence needs the standard of temporal information, the temporal information frame that multiplexing framing module is further used for multi-frame and temporal information frame generation module produce carries out multiplexing, generates synchronous burst.
The synchronous burst that synchronous burst generation module generates and the system clock that system clock generation module produces are input to each base band veneer by same clock bus.Base band veneer can select the synchronizing informations such as the frame number of to one's name standard from synchronous burst according to the type of standard, and phase-locked loop etc. can be utilized from system clock to recover work clock.Therefore, in present embodiment, each base band veneer shares same clock bus, relative to prior art, decreases the cabling on each base band veneer and interface device, reduces equipment cost.Mainly GSM and WCDMA double-standard base station is illustrated in present embodiment, when comprising the base band veneer of more than two different systems in this base station, same clock bus can be shared equally, as shown in Figure 5.
As shown in Figure 2, this multi-standard base station is also included as the public module that base band veneer provides master control and/or transfer function; Each base band veneer in same base station is connected with this public module in direct or indirect mode, the master control that this public module shared provides and/or transfer function.Use the master control of controlling oneself to compare with transmission separately with base band veneer each in prior art, make can to share a set of parts at multiple base band veneer by sharing master control and/or transmission are provided, reduce cost; When making to expand in base station by sharing, the base band veneer newly added no longer needs independently master control and transmission part, reduces expansion cost.In Fig. 2, each base band veneer is connected with public module by a general control information switching bus (IDX1).Public module in Fig. 2 has two, each other main and standby relation, to improve the global reliability of system.
Switching bus mode is one of mode connecting base band veneer and public module just, exemplifies the connected mode that some are available below:
Chain is interconnected, and wherein public module is in one end of chain, and each base band veneer is connected on a chain, as shown in Figure 6.
Star-like interconnected, wherein public module is in center, is connected respectively, as shown in Figure 7 with each base band veneer.
Bus-type is interconnected, and wherein public module is connected with same bus respectively with each base band veneer, as shown in Figure 8.
Ring-like interconnected, wherein public module and each base band veneer are serially connected on same ring respectively, as shown in Figure 9.
Crossover is interconnected, and wherein public module is connected with same switch respectively with each base band veneer, as shown in Figure 10.
Interconnected due to the various modes such as chain, star-like, bus-type, ring-like, crossover can be passed through between public module and each Base Band Unit, add flexibility during actual disposition base station.
In addition, in the present embodiment, this first switching bus compatible each standard in the following manner:
This first switching bus carries I/Q data in units of basic frame group, each basic frame group comprises N number of basic frame, the cycle of each basic frame group is M times of the business datum standard cycle of radio-frequency apparatus (Radio Equipment is called for short " base band veneer and radio frequency unit "); The I/Q data in M business datum standard cycle is filled in a basic frame group and transmits by base band veneer and radio frequency unit; Wherein, N and M is natural number, and base band veneer and radio frequency unit comprise base band veneer and radio frequency unit.
Realize for the filling of the wireless I/Q data of multiple different systems and synchronous by common multiple relationship map mode, general-purpose interface is made to be applicable to multiple types type, enhance interface compatibility, improve the flexibility ratio of wireless transmission, simplify wave point transmission mechanism.
I/Q data due to different rates will be carried in identical speed, in order to ensure that processing delay does not have too large variation, to try one's best evenly when needing IQ is filled, make the I/Q data of the traffic frame of often kind of wireless traffic of the alignment each base band veneer of carrying and radio frequency unit as far as possible of each basic frame in basic frame group.In order to reach this effect, according to one of following rule the I/Q data in M business datum standard cycle can be filled in a basic frame group and transmit:
Be that each base band veneer and radio frequency unit distribute bearing space K bit in the load zones of each basic frame of basic frame group, make K=[M × 2 × D × S × A × C × F/N], wherein A is the antenna number of this base band veneer and radio frequency unit, C is the carrier number of this base band veneer and radio frequency unit, S is the over-sampling multiple of this interface I/Q data, D is the bit wide of these I/Q data, and F is the sector number that this base band veneer and radio frequency unit are supported, " [] " represents the operation that rounds up.
Or, when needed for the reality that the bearing space distributed in basic frame group is greater than traffic frame I/Q data during bearing space, the bearing space in sequential basic frame is rearward transmitted in this basic frame group of preferential filling, make the basic frame of a part rearward according to transmitting sequential fill its whole bearing space, and all the other the basic frames in this basic frame group fill equal amount of data.
Or, when needed for the reality that the bearing space distributed in basic frame group is greater than traffic frame I/Q data during bearing space, the bearing space in sequential basic frame is rearward transmitted in this basic frame group of preferential filling, the basic frame of a part rearward according to transmitting sequential is made to fill its whole bearing space, the forward basic frame bearing space of a part of transmission sequential in this basic frame group is not filled, and centre has one or the basic frame of zero to be partially filled data.
Or, when needed for the reality that the bearing space distributed in basic frame group is greater than traffic frame I/Q data during bearing space, the bearing space in the forward basic frame of sequential is transmitted in this basic frame group of preferential filling, make the basic frame of a forward part according to transmitting sequential fill its whole bearing space, and all the other the basic frames in this basic frame group fill equal amount of data.
Or, when needed for the reality that the bearing space distributed in basic frame group is greater than traffic frame I/Q data during bearing space, the bearing space in the forward basic frame of sequential is transmitted in this basic frame group of preferential filling, the basic frame of a forward part according to transmitting sequential is made to fill its whole bearing space, the basic frame bearing space of a transmission sequential part rearward in this basic frame group is not filled, and centre has one or the basic frame of zero to be partially filled data.
Second embodiment of the invention relates to a kind of sending method of multi-standard base station, and as shown in figure 11, in step 1201, each base band veneer of different systems carries out Base-Band Processing to descending data respectively and generates I/Q data, outputs to the first switching bus.By the radio frequency unit using the first switching bus to connect each base band veneer and its correspondence, utilize the first switching bus to the compatibility of various standard I/Q data, make different systems base band veneer can mixed insertion in same base station.Wherein, each base band veneer obtains clock signal according to same clock bus, and carries out Base-Band Processing according to this clock signal.
Then enter step 1202, the I/Q data from each base band veneer, in the mode of each standard of compatibility, is transferred to after corresponding radio frequency unit carries out radio frequency processing and sends by the first switching bus respectively.
Third embodiment of the invention relates to a kind of method of reseptance of multi-standard base station, as shown in figure 12.
In step 1301, each RF processing unit generates the I/Q data of different systems after respectively upward signal being carried out radio frequency processing, output to the first switching bus.
Then enter step 1302, the I/Q data from each RF processing unit, in the mode of each standard of compatibility, is transferred to after corresponding each base band veneer carries out Base-Band Processing and transmits to up direction by the first switching bus respectively.Wherein, each base band veneer obtains clock signal according to same clock bus, and carries out Base-Band Processing according to this clock signal.
Although by referring to some of the preferred embodiment of the invention, to invention has been diagram and describing, but those of ordinary skill in the art should be understood that and can do various change to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (14)
1. a base station, comprises at least one radio frequency unit, it is characterized in that, also comprise,
Belong at least two pieces of base band veneers of at least two kinds of standards respectively;
First switching bus, for being connected to corresponding radio frequency unit in the mode of each described standard of compatibility by each base band veneer.
2. base station according to claim 1, is characterized in that, described first switching bus is compatible each described standard in the following manner:
This first switching bus carries I/Q data in units of basic frame group, and each basic frame group comprises N number of basic frame, and the cycle of each basic frame group is M times of the business datum standard cycle;
The I/Q data in M business datum standard cycle is filled in a basic frame group and transmits by described base band veneer and radio frequency unit;
Wherein, N and M is natural number.
3. base station according to claim 2, it is characterized in that, described base band veneer and radio frequency unit are that each described radio frequency unit distributes bearing space K bit in the load zones of each basic frame of described basic frame group, make K=[M × 2 × D × S × A × C × F/N], wherein A is the antenna number of this radio frequency unit, C is the carrier number of this radio frequency unit, S is the over-sampling multiple of this interface I/Q data, D is the bit wide of these I/Q data, F is the sector number that this radio frequency unit is supported, " [] " represents the operation that rounds up;
Or, when needed for the reality that the bearing space distributed in described basic frame group is greater than described traffic frame I/Q data during bearing space, described base band veneer and radio frequency unit preferentially fill in this basic frame group the bearing space transmitted in sequential basic frame rearward, make the basic frame of a part rearward according to transmitting sequential fill its whole bearing space, and all the other the basic frames in this basic frame group fill equal amount of data;
Or, when needed for the reality that the bearing space distributed in described basic frame group is greater than described traffic frame I/Q data during bearing space, described base band veneer and radio frequency unit preferentially fill in this basic frame group the bearing space transmitted in sequential basic frame rearward, the basic frame of a part rearward according to transmitting sequential is made to fill its whole bearing space, the forward basic frame bearing space of a part of transmission sequential in this basic frame group is not filled, and centre has one or the basic frame of zero to be partially filled data;
Or, when needed for the reality that the bearing space distributed in described basic frame group is greater than described traffic frame I/Q data during bearing space, described base band veneer and radio frequency unit preferentially fill in this basic frame group the bearing space transmitted in the forward basic frame of sequential, make the basic frame of a forward part according to transmitting sequential fill its whole bearing space, and all the other the basic frames in this basic frame group fill equal amount of data;
Or, when needed for the reality that the bearing space distributed in described basic frame group is greater than described traffic frame I/Q data during bearing space, described base band veneer and radio frequency unit preferentially fill in this basic frame group the bearing space transmitted in the forward basic frame of sequential, the basic frame of a forward part according to transmitting sequential is made to fill its whole bearing space, the basic frame bearing space of a transmission sequential part rearward in this basic frame group is not filled, and centre has one or the basic frame of zero to be partially filled data.
4., according to the arbitrary described base station of claims 1 to 3, it is characterized in that, also comprise public module, at least providing one of master control, transmission, clock for base band veneer;
Described public module is connected in direct or indirect mode with each described base band veneer;
One of master control, transmission, clock that each base band veneer at least uses described public module to provide.
5. base station according to claim 4, it is characterized in that, comprise Synchronization Burst generation module in described public module, for generating the Synchronization Burst of each described standard according to system clock, this Synchronization Burst outputs to each base band veneer by same clock bus.
6. base station according to claim 5, is characterized in that, the number of the standard that described Synchronization Burst indicates described base station to support, the type of each described standard, frame number needed for each described standard and temporal information.
7. base station according to claim 4, is characterized in that, described public module and each base band veneer are connected one of in the following manner:
Chain is interconnected, and wherein said public module is in one end of chain, and each base band veneer is connected on a chain;
Star-like interconnected, wherein said public module, in center, is connected with each base band veneer respectively;
Bus-type is interconnected, and wherein said public module is connected with same bus respectively with each base band veneer;
Ring-like interconnected, wherein said public module and each base band veneer are serially connected on same ring respectively;
Crossover is interconnected, and wherein said public module is connected with same switch respectively with each base band veneer.
8. a signaling method, is characterized in that, comprising:
Each base band veneer of different systems carries out Base-Band Processing to descending data respectively and generates I/Q data, outputs to the first switching bus;
I/Q data from each described base band veneer, in the mode of each described standard of compatibility, is transferred to after corresponding radio frequency unit carries out radio frequency processing and sends by described first switching bus respectively.
9. signaling method according to claim 8, is characterized in that, described first switching bus is compatible each described standard in the following manner:
This first switching bus carries I/Q data in units of basic frame group, and each basic frame group comprises N number of basic frame, and the cycle of each basic frame group is M times of the business datum standard cycle;
The I/Q data in M business datum standard cycle is filled in a basic frame group and transmits by described base band veneer and radio frequency unit;
Wherein, N and M is natural number.
10. signaling method according to claim 9, is characterized in that, the I/Q data in M business datum standard cycle is filled in a basic frame group and transmits by described base band veneer and radio frequency unit, comprising:
Be that each described radio frequency unit distributes bearing space K bit in the load zones of each basic frame of described basic frame group, make K=[M × 2 × D × S × A × C × F/N], wherein A is the antenna number of this radio frequency unit, C is the carrier number of this radio frequency unit, S is the over-sampling multiple of this interface I/Q data, D is the bit wide of these I/Q data, and F is the sector number that this radio frequency unit is supported, " [] " represents the operation that rounds up;
Or, when needed for the reality that the bearing space distributed in described basic frame group is greater than described traffic frame I/Q data during bearing space, the bearing space in sequential basic frame is rearward transmitted in this basic frame group of preferential filling, make the basic frame of a part rearward according to transmitting sequential fill its whole bearing space, and all the other the basic frames in this basic frame group fill equal amount of data;
Or, when needed for the reality that the bearing space distributed in described basic frame group is greater than described traffic frame I/Q data during bearing space, the bearing space in sequential basic frame is rearward transmitted in this basic frame group of preferential filling, the basic frame of a part rearward according to transmitting sequential is made to fill its whole bearing space, the forward basic frame bearing space of a part of transmission sequential in this basic frame group is not filled, and centre has one or the basic frame of zero to be partially filled data;
Or, when needed for the reality that the bearing space distributed in described basic frame group is greater than described traffic frame I/Q data during bearing space, the bearing space in the forward basic frame of sequential is transmitted in this basic frame group of preferential filling, make the basic frame of a forward part according to transmitting sequential fill its whole bearing space, and all the other the basic frames in this basic frame group fill equal amount of data;
Or, when needed for the reality that the bearing space distributed in described basic frame group is greater than described traffic frame I/Q data during bearing space, the bearing space in the forward basic frame of sequential is transmitted in this basic frame group of preferential filling, the basic frame of a forward part according to transmitting sequential is made to fill its whole bearing space, the basic frame bearing space of a transmission sequential part rearward in this basic frame group is not filled, and centre has one or the basic frame of zero to be partially filled data.
Signaling method described in 11. according to Claim 8 to 10 are arbitrary, is characterized in that, also comprise:
Base band veneer obtains one of master control, transmission, clock from the public module shared directly or indirectly;
This base band veneer at least use obtained master control, transmission, clock a pair baseband signal process.
12. signaling methods according to claim 11, is characterized in that, described base band veneer obtains clock from the public module shared directly or indirectly and comprises:
Described base band veneer receives corresponding Synchronization Burst by same clock bus, and described Synchronization Burst generates according to system clock.
13. signaling methods according to claim 12, is characterized in that, the number of the standard that described Synchronization Burst indicates described base station to support, the type of each described standard, frame number needed for each described standard and temporal information.
14. 1 kinds of wireless communication systems, is characterized in that, comprise at least one base station according to any one of claim 1 to 7 in this system.
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