CN102395227B - Multiplex method of communication signal, wireless communication system and radio equipment controller - Google Patents
Multiplex method of communication signal, wireless communication system and radio equipment controller Download PDFInfo
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Abstract
An embodiment of the invention provides a multiplex method of a communication signal, a wireless communication system and a radio equipment controller. Taking a CPRI (common public radio interface) as an example, in each embodiment provided in the invention, through bearing a plurality paths of CPRI links on a limited physical link (CPRI-MUX), generally on a path of high speed physical link, a physical bandwidth is fully utilized, a quantity of interconnection interfaces is reduced, system cost is reduced, and compatibility of a CPRI standard is maintained simultaneously. When the high speed physical link bandwidth is not enough, a physical link can be increased further.
Description
The application is to be on December 17th, 2008 applying date, and application number is 200810241623.2, and invention and created name is the divisional application of the Chinese patent application of " multichannel multiplexing method, wireless communication system and the radio equipment controller of signal of communication ".
Technical field
The present invention relates to the communications field, particularly relate to multichannel multiplexing method, wireless communication system and the radio equipment controller of signal of communication.
Background technology
Wireless base system can be divided into radio equipment controller (Radio Equipment Controller is called for short REC) and wireless device (Radio Equipment is called for short RE).The interface that connects REC and RE can be called REC-RE interface.
Common public radio interface (Common Public Radio Interface is called for short CPRI) standard is an interface standard of being formulated by communications equipment manufacturer.In this standard, the REC-RE interface that connects REC and RE can be called CPRI interface.
Open base station architecture motion (Open Base Station Architecture Initiative is called for short OBSAI) standard is another interface standard of being formulated by communications equipment manufacturer.In this standard, the REC-RE interface that connects REC and RE can be called OBSAI interface.
Along with developing rapidly of radio network technique, be the investment of protection operator, reduce the risk that turn of the market brings, industry has proposed the concept of Multi-Mode Base Station.The one of Multi-Mode Base Station concept is expressed as: the base station of simultaneously supporting two or more communication standard application in a rack.
The advantage of Multi-Mode Base Station mainly contains:
(1) can reuse base station equipment, comprise and reuse hardware platform and software architecture;
(2) can repeat to install by minimizing equipment, reduce space, site.
For example, GSM/UMTS dual-mode base station concept is to occur along with the maturation gradually of IMT-2000 (International Mobile Telecommunication-2000) technology in later 1990s.But because the life cycle of GSM is longer than expection, software radio (Software Defined Radio, SDR) technological break-through is made slow progress, the Multi-Mode Base Station based on SDR technology far can not meet the demand of operator.
Market is still very urgent to the demand of Multi-Mode Base Station solution.
Summary of the invention
The technical problem that embodiment of the present invention will solve is to provide a kind of multichannel multiplexing method, wireless communication system and radio equipment controller of signal of communication.
For solving the problems of the technologies described above, one embodiment of the present invention provide a kind of multichannel multiplexing method of signal of communication, be applied in wireless communication system, this system comprises at least two interconnected radio equipment controllers: the first radio equipment controller and the second radio equipment controller, this second radio equipment controller is at least connected with the first multimode wireless device and the second multimode wireless device, and the method comprises:
Receive the first data that this first radio equipment controller sends to this first multimode wireless device and this second multimode wireless device;
These first data of demultiplexing obtain this first radio equipment controller and send to the data of this first multimode wireless device and this first radio equipment controller to send to the data of this second multimode wireless device;
Multiplexing this first radio equipment controller sends to the data of this first multimode wireless device and this second radio equipment controller to send to the data of this first multimode wireless device to obtain the second data;
Multiplexing this first radio equipment controller sends to the data of this second multimode wireless device and this second radio equipment controller to send to the data of this second multimode wireless device to obtain the 3rd data;
Send this second data to this first multimode wireless device;
Send the 3rd data to this second multimode wireless device;
Wherein, these first data are that data by this first radio equipment controller being sent to this first multimode wireless device and this first radio equipment controller send on the data-reusing Yi road physical link of this second multimode wireless device and obtain, and this second radio equipment controller receives this first data by Gai Yi road physical link.
Embodiments of the present invention also provide a kind of radio equipment controller, and this radio equipment controller is at least connected with the first multimode wireless device and the second multimode wireless device, comprising: multiplex/demultiplex module, for:
Receive the first data that another radio equipment controller sends to this first multimode wireless device and this second multimode wireless device;
These first data of demultiplexing obtain this another radio equipment controller and send to the data of this first multimode wireless device and this another radio equipment controller to send to the data of this second multimode wireless device;
Multiplexing this another radio equipment controller sends to the data of this first multimode wireless device and this radio equipment controller to send to the data of this first multimode wireless device to obtain the second data;
Multiplexing this another radio equipment controller sends to the data of this second multimode wireless device and this radio equipment controller to send to the data of this second multimode wireless device to obtain the 3rd data;
Wherein, these first data are that data by this another radio equipment controller being sent to this first multimode wireless device and this another radio equipment controller send on the data-reusing Yi road physical link of this second multimode wireless device and obtain, and this multiplex/demultiplex module receives this first data by Gai Yi road physical link.
Embodiment of the present invention also provides a kind of radio equipment controller, and this radio equipment controller is at least communicated by letter with the second multimode wireless device with the first multimode wireless device, comprising: multiplex/demultiplex module, for:
Send to another radio equipment controller sending on the data-reusing Yi road physical link of this first multimode wireless device and this second multimode wireless device;
The data from this first multimode wireless device and this second multimode wireless device that receive on demultiplexing Gai mono-road physical link.
A kind of wireless communication system, comprises aforementioned any radio equipment controller, and this radio equipment controller is communicated by letter with at least two multimode wireless devices.
Description by above each embodiment can be found out, taking CPRI as example, in embodiment provided by the invention, by by multichannel CPRI link bearer on limited physical link (CPRI-MUX), on the high-speed physical link of general Shi Yi road, make full use of band width in physical, reduce the quantity of interconnecting interface, reduce system cost, keep the compatibility to CPRI standard simultaneously.In the time that this road high-speed physical link bandwidth is inadequate, can also further increase physical link.
Brief description of the drawings
Fig. 1 is the wireless base system structural representation sketch that comprises REC, RE;
Fig. 2 is a kind of Multi-Mode Base Station solution of embodiment of the present invention simplified schematic diagram;
Fig. 3 is a kind of Multi-Mode Base Station solution of embodiment of the present invention simplified schematic diagram;
Fig. 4 is the multiplexed simplified schematic diagram of CPRI physical link in Fig. 3;
Fig. 5 is the basic frame frame structure of a kind of CPRI simplified schematic diagram of embodiment of the present invention CPRI multichannel multiplexing method;
Fig. 6 is the basic frame frame structure of a kind of CPRI simplified schematic diagram of embodiment of the present invention CPRI multichannel multiplexing method;
Fig. 7 is the basic frame frame structure of a kind of CPRI simplified schematic diagram of embodiment of the present invention CPRI multichannel multiplexing method;
Fig. 8 is the basic frame frame structure of a kind of CPRI simplified schematic diagram of embodiment of the present invention CPRI multichannel multiplexing method;
Fig. 9 is the basic frame frame structure of a kind of CPRI simplified schematic diagram of embodiment of the present invention CPRI multichannel multiplexing method.
Embodiment
For convenience of explanation instead of restriction, below describe in the detail such as particular architecture, interface, technology etc. has been proposed, to thoroughly understand the present invention.Then, it will be apparent to those skilled in the art that, in other embodiment that deviates from these details, also can realize the present invention.In other cases, omit the detailed description to well-known device, circuit and method, in order to avoid unnecessary details hinders explanation of the present invention.In addition, provide in some drawings each functional block.Those skilled in the art will appreciate that these functions can adopt independent hardware circuit, adopt in conjunction with the digital microprocessor of suitable programming or the software of all-purpose computer work, adopt application-specific integrated circuit (ASIC) (ASIC) and/or adopt one or more digital signal processors (DSP) to realize.
Embodiment of the present invention is mainly explained as an example of the situation in WCDMA/GSM bimodulus (W/G bimodulus) example, the bimodulus of other standard or multimode combination, for example: GSM, CDMA, WCDMA, TD-SCDMA, LTE (Long Term Evolution), WIMAX, Ultra-Mobile Broadband (Ultra Mobile Broadband, be called for short " UMB "), personal handyphone system (Personal Handy-phone System, be called for short " PHS "), or AIE (Air Interface Evolution, be called for short " AIE ") and any two kinds of standards of the standard such as new radio communication standard that occurs of follow-up evolution or the combination of multiple types can analogize, such as: WCDMA/CDMA bimodulus, WCDMA/WIMAX bimodulus, WCDMA/GSM/CDMA multimode etc.Embodiment of the present invention is mainly explained as an example of CPRI interface example, interface type between other REC-RE, such as: the REC-RE proprietary protocol interface of the Ir interface relating in OBSAI interface, TD-SCDMA and miscellaneous equipment supplier oneself definition can be analogized.Embodiment of the present invention is explained as an example of the basic frame of CPRI example, and the similar frame of corresponding other REC-RE interface can be analogized.Embodiment of the present invention is explained as an example of the control word information in the basic frame of CPRI example, and the control information being similarly included in frame of corresponding other REC-RE interface can be analogized.In like manner, some entity/equipment/device/unit with specific names that the embodiment of the present invention relates to can replace with the entity/equipment/device/unit with identical or similar functions equally, no longer superfluous chatting.
Consulting Fig. 1 is the wireless base system _ 100 structural representation sketch that comprises REC, RE.
REC_101 generally includes: transport module _ 103 that are connected with network controller _ 110, BB (the BaseBand being connected with transport module, base band) module _ 105, base band radio frequency interface module _ 107 that are connected with baseband module, and master clock module _ 109 that are connected with transport module, baseband module, base band radio frequency interface module.In realization, these functional modules can highly be integrated in one, such as being integrated on one or more veneer, and be arranged at a Base Band Unit (Baseband Unit that volume is very little, be called for short BBU) in box, form a Field Replaceable (Field Replaceable Unit is called for short FRU).
In up link, under the control of master clock module, send BB module from the signal of RE to by base band radio frequency interface module and process, for example: separate mediation decoding, finally communicate information to network controller through transport module.
On down link, under the control of master clock module, from the signal of network controller, send BB module to through transport module and process, for example: coding and modulation, the signal then processing being obtained sends RE to by base band radio frequency interface module.
RE_111 generally includes: REC-RE interface module _ 113 that are connected with REC, master clock module _ 119 that are connected with REC-RE interface module and middle radio-frequency module (RF/IF module) _ 117.In RF/IF module, IF is optional module, and RF/IF module can only include RF module.
In up link, for example, from the signal process RF/IF resume module of eating dishes without rice or wine: rf filtering amplification, down-conversion, analog-to-digital conversion, digital filtering etc., the signal then by REC-RE interface module, processing being obtained sends REC to.
On down link, from the signal of REC, send RF/IF resume module to by REC-RE interface module, for example: digital-to-analogue conversion, up-conversion filter and amplification etc., finally by antenna, signal is launched.
The form of RE can comprise: Remote Radio Unit (Radio Remote Unit is called for short RRU), radio frequency and filter unit (Radio and Filter Unit is called for short RFU), support radio frequency unit of multiple communication standard etc.
One embodiment of the present of invention provide a kind of multichannel multiplexing method of signal of communication, be applied in wireless communication system, this system comprises at least two interconnected radio equipment controllers: the first radio equipment controller and the second radio equipment controller, this second radio equipment controller is at least connected with the first multimode wireless device and the second multimode wireless device, and the method comprises:
Receive the first data that this first radio equipment controller sends to this first multimode wireless device and this second multimode wireless device;
These first data of demultiplexing obtain this first radio equipment controller and send to the data of this first multimode wireless device and this first radio equipment controller to send to the data of this second multimode wireless device;
Multiplexing this first radio equipment controller sends to the data of this first multimode wireless device and this second radio equipment controller to send to the data of this first multimode wireless device to obtain the second data;
Multiplexing this first radio equipment controller sends to the data of this second multimode wireless device and this second radio equipment controller to send to the data of this second multimode wireless device to obtain the 3rd data;
Send this second data to this first multimode wireless device;
Send the 3rd data to this second multimode wireless device;
Wherein, these first data are that data by this first radio equipment controller being sent to this first multimode wireless device and this first radio equipment controller send on the data-reusing Yi road physical link of this second multimode wireless device and obtain, and this second radio equipment controller receives this first data by Gai Yi road physical link.
An alternative embodiment of the invention provides a kind of radio equipment controller, and this radio equipment controller is at least connected with the first multimode wireless device and the second multimode wireless device, comprising: multiplex/demultiplex module, for:
Receive the first data that another radio equipment controller sends to this first multimode wireless device and this second multimode wireless device;
These first data of demultiplexing obtain this another radio equipment controller and send to the data of this first multimode wireless device and this another radio equipment controller to send to the data of this second multimode wireless device;
Multiplexing this another radio equipment controller sends to the data of this first multimode wireless device and this radio equipment controller to send to the data of this first multimode wireless device to obtain the second data;
Multiplexing this another radio equipment controller sends to the data of this second multimode wireless device and this radio equipment controller to send to the data of this second multimode wireless device to obtain the 3rd data;
Wherein, these first data are that data by this another radio equipment controller being sent to this first multimode wireless device and this another radio equipment controller send on the data-reusing Yi road physical link of this second multimode wireless device and obtain, and this multiplex/demultiplex module receives this first data by Gai Yi road physical link.
An alternative embodiment of the invention provides a kind of radio equipment controller, and this radio equipment controller is at least communicated by letter with the second multimode wireless device with the first multimode wireless device, comprising: multiplex/demultiplex module, for:
Send to another radio equipment controller sending on the data-reusing Yi road physical link of this first multimode wireless device and this second multimode wireless device;
The data from this first multimode wireless device and this second multimode wireless device that receive on demultiplexing Gai mono-road physical link.
An alternative embodiment of the invention provides a kind of wireless communication system, comprises aforementioned any radio equipment controller, and this radio equipment controller is communicated by letter with at least two multimode wireless devices.
Consult Fig. 2, a kind of Multi-Mode Base Station solution of embodiment of the present invention simplified schematic diagram.
REC_201 is connected with the RE_203 of three bimodulus, is connected with network controller simultaneously.REC_201 with network controller connected mode can be: be connected with network controller by REC_A 201a; Or be connected with network controller by REC_B 201b; Or REC_A 201a is connected with the network controller of two different communication standards respectively with REC_B 201b.A corresponding road CPRI physical link between the RE_203 of REC_B 201b and each bimodulus: corresponding physical link CPRI-0 between REC_B 201b and RE_203a, corresponding physical link CPRI-1 between REC_B 201b and RE_203b, corresponding physical link CPRI-2 between REC_B 201b and RE_203c.
Between the REC_B 201b of the REC_A 201a that supports standard A (such as: WCDMA standard) and support standard B (such as: GSM standard), there is multichannel CPRI physical link.Communicating by letter between REC_A 201a and RE_203a need to be by the physical link CPRI-A0 of REC_A 201a and REC_B 201b, and physical link CPRI-0 between REC_B 201b and RE_203a realizes, Ke Yiwei: REC_B 201b issues by physical link CPRI-A0 the data-reusing that the data of RE_203a and REC_B 201b issue RE_203a by REC_A 201a and send to RE_203a on physical link CPRI-0.In like manner, communicating by letter between REC_A 201a and RE 203b need to be by the physical link CPRI-A1 of REC_A 201a and REC_B 201b, and physical link CPRI-1 between REC_B 201b and RE_203b realizes, Ke Yiwei: REC_B 201b issues by physical link CPRI-A1 the data-reusing that the data of RE_203b and REC_B 201b issue RE_203b by REC_A 201a and send to RE_203b on physical link CPRI-1; Communicating by letter between REC_A 201a and RE_203c need to be by the physical link CPRI-A2 of REC_A 201a and REC_B 201b, and physical link CPRI-2 between REC_B 201b and RE_203c realizes, Ke Yiwei: REC_B 201b issues by physical link CPRI-A2 the data-reusing that the data of RE_203c and REC_B 201b issue RE_203c by REC_A201a and send to RE_203c on physical link CPRI-2.Each road CPRI physical link between REC and REC, between REC and RE all needs to be connected with cable, such as: optical fiber, cable (as: netting twine etc.).
By above description, can see that the base station solution of this bimodulus or multimode need to be set up multichannel CPRI physical link between the REC that supports single mode.Meanwhile, need to set up CPRI physical link with each RE with the direct-connected single mode REC of RE of bimodulus or multimode.By the cascade system of this CPRI physical link, can realize between the REC of each single mode and each multimode RE and have a CPRI physical link.
The advantage of this solution is: can utilize the REC of single mode, realize Multi-Mode Base Station solution by cascade.
This solution also has its inferior position.As seen from Figure 2, in the time that the RE number being connected with REC_B 201b is a lot, the interconnecting interface between REC_A 201a and REC_B 201b will increase accordingly, thereby has inevitably increased complexity and the cost of system.Simultaneously, because each the road CPRI physical link between REC_A 201a and REC_B 201b is all independently, the band width in physical of possible each road CPRI physical link does not all make full use of, and under the reality of bandwidth resources preciousness, this will cause the huge waste of system resource.Further, each the road CPRI physical link between REC_A 201a and REC_B 201b all needs to be connected with cable, such as: optical fiber, cable etc., this has just inevitably increased the complexity of system distribution.
Fig. 3 is a kind of Multi-Mode Base Station solution of embodiment of the present invention simplified schematic diagram.
REC_301 comprises: the REC_A 301a that supports standard A (such as: WCDMA standard) and the REC_B 301b that supports standard B (such as: GSM standard).REC_301 is connected with network controller.REC_301 with network controller connected mode can be: be connected with network controller by REC_A 301a; Or be connected with network controller by REC_B 301b; Or REC_A 301a is connected with the network controller of two different communication standards respectively with REC_B 301b.Between REC_A 301a and REC_B 301b, be connected by the multiplexing physical link CPRI-MUX in a road, carrying REC_A301a is to the CPRI logical links of multiple bimodulus RE_303.REC_B 301b can be star-like (as: REC_B 301b and RE_303a, RE_303b, RE_303c), chain (as: REC_B 301b and RE_303a, RE_303d) or tree type (as: REC_B 301b and RE_303c, RE_303e, RE_303f) with the topological structure that is connected of RE_303.Each road CPRI physical link between REC and REC, between REC and RE all needs to be connected with cable, such as: optical fiber, cable.
This embodiment has proposed the multiplexed solution of CPRI link, that is: CPRI-MUX.By by multichannel CPRI link bearer on limited physical link, general Shi Yi road high-speed physical link, makes full use of band width in physical, reduces the quantity of interconnecting interface, reduces system cost, keeps the compatibility to CPRI standard simultaneously.In the time that this road high-speed physical link bandwidth is inadequate, can also further increase physical link.
Fig. 4 is the multiplexed simplified schematic diagram of CPRI link in Fig. 3.
In figure, between the BB module 305 of REC_A 301a and CPRI multiplex/demultiplex module 307a (CPRI-MUX/DeMUX), there is multichannel CPRI link, such as: CPRI-A0, CPRI-A1, CPRIA2.The number of the CPRI link between the number of the RE that REC_A 301a is corresponding and BB module 305 and CPRI multiplex/demultiplex module 307a (CPRI-MUX/DeMUX) equates.This multichannel CPRI link is exported the multiplexing physical link of a road CPRI (CPRI-MUX) after the multiplexing process of CPRI multiplex/demultiplex module 307a.This road multiplexing physical link of CPRI has connected the CPRI multiplex/demultiplex module 307 of REC_A 301a and REC_B301b.The CPRI multiplex/demultiplex module 307b of REC_B 301b carries out demultiplexing processing to the multiplexing physical link of input Yi road CPRI, again obtains multichannel CPRI link: CPRI-A0, CPRI-A1, CPRIA2.Some is similar to the embodiment shown in Fig. 2, the data-reusing that REC_B 301b further sends to REC_A 301a and REC_B 301b same RE sends to this RE on the CPRI physical link that is connected REC_B 301b and this RE, such as: REC_A 301a is issued to the data-reusing that the data of RE_303a and REC_B 301b issue RE_303a by CPRI-A0 link and on CPRI-0 physical link, send to RE_303a.In like manner, REC_B 301b further can: REC_A 301a is issued to the data-reusing that the data of RE_303b and REC_B 301b issue RE_303b by CPRI-A1 link and on CPRI-1 physical link, sends to RE_303b; REC_A 301a is issued to the data-reusing that the data of RE_303c and REC_B 301b issue RE_303c by CPRI-A2 link and on CPRI-2 physical link, send to RE_303c.
Below further by multiple embodiment, be described realize the multiplexing method of multichannel CPRI link on CPRI-MUX.Following examples are all multiplexed with example with 3 road CPRI links, and 2 tunnels and the multiplexing situation of CPRI links more than 3 tunnels can be analogized, and repeat no more.
In various embodiments of the present invention, business datum is often referred to actual user data or message.Generally, if Base-Band Processing completes in REC side, business datum is homophase and orthogonal (IQ) data.Operation maintenance data (OM data, Operation and Maintenance data) is the data relevant to Operation and Maintenance, generally includes: HDLC (High-level Data Link Control) data or Ethernet data.
Fig. 5 is the basic frame frame structure of a kind of CPRI simplified schematic diagram of embodiment of the present invention CPRI link multichannel multiplexing method.
In figure, be multiplexed with example with 3 road CPRI links, taking the basic frame of the CPRI of the upper transmission of CPRI-MUX as unit, multiplexing multichannel CPRI link information in a basic frame.Suppose to have three CPRI ports for connecting three RE to support three road CPRI links, it is the corresponding road CPRI link of each CPRI port, the corresponding RE of each road CPRI link, the control word of three ports, business information (for example: IQ data block) are by the resource taking respectively in basic frame.
K28.5 sync byte in basic frame: according to CPRI agreement, in every 256 basic frames of CPRI, the control word of No. 0 basic frame is K28.5 sync byte.The in the situation that of CPRI-MUX carrying multichannel CPRI, if the control word of each CPRI link is carried K28.5, will cause timing error.Therefore,, on CPRI-MUX, only there is K28.5 in the control word of port 0.
The multiplexed information of basic frame: in the control word of port 0, identify CPRI version information, and the multiplexing details of subsidiary CPRI link, for example: by MUX-HEAD field carry information.The receiving terminal of this basic frame just can be resolved and learn whether the basic frame of receiving is CPRI link multiplex mode according to aforesaid CPRI version information.If the basic frame receiving belongs to CPRI link multiplex mode, receiving terminal is further resolved MUX-HEAD information.If the basic frame receiving does not belong to CPRI link multiplex mode, the basic frame that receiving terminal is received according to non-multiplex mode processing.
MUX-HEAD in basic frame: the information that multiplexing basic frame has comprised multiple ports, on down direction, need to exchange to different ports by multiplexing basic frame information and get on; On up direction, the CPRI data-reusing of multiple ports need to be gone to the physical link of CPRI-MUX transmission Yi road.Because MUX-HEAD carries the multiplexing details of CPRI link, so, the content that needs specific definition MUX-HEAD, comprising: business information (for example: IQ data block) length and the length of original position and MUX-HEAD itself etc. of the length of the control word of CPRI port number, each port and original position, each port.The information that the receiving terminal of multiplexing basic frame just can carry according to MUX-HEAD is that basis exchanges and route the information of each road CPRI link.MUX-HEAD utilizes the spare field of CPRI control word to realize, such as realizes by the self-defining field of manufacturer specifying in CPRI agreement.
The CPRI control word information of every road CPRI link is concentrated and is arranged, and the IQ information of every road CPRI link is concentrated and arranged.CPRI control word information, the IQ information of different CPRI links are distributed in basic frame relatively independently, and its original position of depositing is specified respectively in MUX-HEAD, and the REC of being convenient to directly to connect RE forwards to RE.
Can see from the above description, in the time that the CPRI link of the upper carrying of CPRI-MUX only has a road, multiplexing basic frame format is exactly the CPRI form of standard: the basic frame of CPRI that only comprises control word information and the IQ information of a road CPRI link.
Fig. 6 is the basic frame frame structure of a kind of CPRI simplified schematic diagram of embodiment of the present invention CPRI link multichannel multiplexing method.
The present embodiment and embodiment illustrated in fig. 5 basic identical, difference is: in the present embodiment, the control word information of each road CPRI link is not concentrated and arranged, but is dispersed in basic frame, such as: and the IQ information of corresponding CPRI link is arranged together.As shown in the figure, the control word information of port 0 and IQ0 arrange, and are then control word information and the IQ1 of port one, are finally control word information and the IQ2 of port 2.
Fig. 7 is the basic frame frame structure of a kind of CPRI simplified schematic diagram of embodiment of the present invention CPRI link multichannel multiplexing method.
In this enforcement, the original position of the multiplexing basic frame of CPRI provides a head information field, carries following information: whether this basic frame is original position, the IQ length of each port and the length of original position and header information field itself etc. of the control word of the multiplexing basic frame CPRI port number of CPRI link, each port.
After header information field, arrange control word information and the IQ information of every road CPRI link.The arrangement of the control word information of each road CPRI link can be with reference to the arrangement mode of figure 5 or Fig. 6.What in Fig. 7, provide is exemplified as the arrangement mode with reference to Fig. 5.
K28.5 in basic frame provides in header information field.
Fig. 8 is the basic frame frame structure of a kind of CPRI simplified schematic diagram of embodiment of the present invention CPRI link multichannel multiplexing method.
The present embodiment and embodiment illustrated in fig. 5 basic identical, maximum difference is, the control word information of multichannel CPRI link is compressed.Because, if the control word information independent distribution of multichannel CPRI link is in basic frame, the control word information field of Dan Mei road CPRI link all may have a lot of spare field, in order to reduce bandwidth waste, the control word information of multichannel CPRI link can be compressed as shown in Figure 8.The field length of the control word information that comprises the multichannel CPRI link after compression can define flexibly, and the length that the control word information of each road CPRI link takies, taking byte as unit, can be 2Bytes, 4Bytes etc.The length information that the control word information of each road CPRI link takies is included in MUX-HEAD field.
Fig. 9 is the basic frame frame structure of a kind of CPRI simplified schematic diagram of embodiment of the present invention CPRI link multichannel multiplexing method.
The present embodiment and embodiment illustrated in fig. 5 basic identical, maximum difference is, each road CPRI link shares a control word information field.OM information, for example: HDLC message, Ethernet message etc. are according to multiplexing this shared control of time division multiplexing mode and clock information field.Out of Memory can share the territory of this control and clock information field, also can take the inner idle domain that retain or that manufacturer is reserved of this shared control and clock information field.
In aforesaid each embodiment, MUX-HEAD has taken independently physical channel resources and has transmitted following CPRI link multiplexed information: whether this basic frame is business information (for example: IQ data block) length and the length of original position and MUX-HEAD itself etc. of the length of control word of the multiplexing basic frame of CPRI link, CPRI port number, each port and original position, each port.In the present embodiment, can not need to transmit above CPRI link multiplexed information with special physical channel, but by the REC of two single systems by the OM passage on CPRI, such as: HDLC, Ethernet protocol etc. carrys out interaction message to transmit above CPRI link multiplexed information.The REC that directly connects RE receives after relevant information, according to the CPRI link multiplexed information of receiving, the information between upper level REC and RE is forwarded and route.
Description by above each embodiment can be found out, taking CPRI as example, in embodiment provided by the invention, by by multichannel CPRI link bearer on limited physical link (CPRI-MUX), on the high-speed physical link of general Shi Yi road, make full use of band width in physical, reduce the quantity of interconnecting interface, reduce system cost, keep the compatibility to CPRI standard simultaneously.In the time that this road high-speed physical link bandwidth is inadequate, can also further increase physical link.
On multiplexing CPRI physical link CPRI-MUX, control word information, the IQ information of every road CPRI link are separate.The control word information of every road CPRI link, the length of IQ information can define and configure according to the demand of manufacturer or operator.CPRI link multiplexed information comprises: whether this basic frame is business information (for example: IQ data block) length and the original position etc. of the length of control word of the multiplexing basic frame of CPRI link, the port number that REC-RE connects, each port and original position, each port.CPRI link multiplexed information can be transmitted by physical channel resources independently, also can with OM (running with safeguard) information commons physical channel resources transmission.
Multichannel multiplexing method to signal of communication provided by the present invention, wireless communication system and radio equipment controller are described in detail by specific embodiment above, and the explanation of above embodiment is just for helping to understand method of the present invention and thought thereof; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications.
Claims (10)
1. a radio equipment controller, it is characterized in that, this radio equipment controller is connected with another radio equipment controller as the second radio equipment controller as the first radio equipment controller, at least to communicate by letter with the second multimode wireless device with the first multimode wireless device by described the second radio equipment controller, described the first radio equipment controller comprises: multiplex/demultiplex module, for:
The data-reusing that sends to described the first multimode wireless device and described the second multimode wireless device is sent to described the second radio equipment controller on Yi road physical link between described the first radio equipment controller and described the second radio equipment controller;
The multiplexing data from described the first multimode wireless device and described the second multimode wireless device on Yi road physical link between described the first radio equipment controller and described the second radio equipment controller that described in demultiplexing, the second radio equipment controller sends, wherein
Described the first radio equipment controller and described the second radio equipment controller are supported respectively different communication standards.
2. the multichannel multiplexing method of a signal of communication, be applied in wireless communication system, it is characterized in that, this system comprises interconnected the first radio equipment controller and the second radio equipment controller, described the first radio equipment controller and described the second radio equipment controller are supported respectively different communication standards, described the second radio equipment controller is at least connected with the first multimode wireless device and the second multimode wireless device, and described method comprises:
Receive the first data that described the first radio equipment controller sends to described the first multimode wireless device and described the second multimode wireless device;
Described in demultiplexing, the first data obtain described the first radio equipment controller and send to the data of described the first multimode wireless device and described the first radio equipment controller to send to the data of described the second multimode wireless device;
Multiplexing described the first radio equipment controller sends to the data of described the first multimode wireless device and described the second radio equipment controller to send to the data of described the first multimode wireless device to obtain the second data;
Multiplexing described the first radio equipment controller sends to the data of described the second multimode wireless device and described the second radio equipment controller to send to the data of described the second multimode wireless device to obtain the 3rd data;
Send described the second data to described the first multimode wireless device;
Send described the 3rd data to described the second multimode wireless device;
Wherein, described the first data are that data by described the first radio equipment controller being sent to described the first multimode wireless device and described the first radio equipment controller send on the data-reusing Yi road physical link of described the second multimode wireless device and obtain, and described the second radio equipment controller receives described the first data by a described road physical link.
3. method as claimed in claim 2, it is characterized in that, described the first data are taking frame as unit, described the first data comprise link multiplexed information, described link multiplexed information comprises: the instruction that described frame is multiplexed frame, the port number that radio equipment controller is connected with wireless device, the length of the control information of each described port and original position, the length of the business information of each described port and original position.
4. method as claimed in claim 3, is characterized in that, described link multiplexed information is passed through independently physical resource transmission, or transmits with Operation and Maintenance information commons physical resource.
5. the method as described in claim 2 to 4 any one, is characterized in that, a described road physical link is CPRI physical link, or OBSAI physical link.
6. a radio equipment controller, it is characterized in that, this radio equipment controller is connected with another radio equipment controller as the first radio equipment controller as the second radio equipment controller, described the first radio equipment controller and described the second radio equipment controller are supported respectively different communication standards, described the second radio equipment controller is at least connected with the first multimode wireless device and the second multimode wireless device, described the second radio equipment controller comprises: multiplex/demultiplex module, for:
Receive the first data that described the first radio equipment controller sends to described the first multimode wireless device and described the second multimode wireless device;
Described in demultiplexing, the first data obtain described the first radio equipment controller and send to the data of described the first multimode wireless device and described the first radio equipment controller to send to the data of described the second multimode wireless device;
Multiplexing described the first radio equipment controller sends to the data of described the first multimode wireless device and described the second radio equipment controller to send to the data of described the first multimode wireless device to obtain the second data;
Multiplexing described the first radio equipment controller sends to the data of described the second multimode wireless device and described the second radio equipment controller to send to the data of described the second multimode wireless device to obtain the 3rd data;
Wherein, described the first data are that data by described the first radio equipment controller being sent to described the first multimode wireless device and described the first radio equipment controller send on the data-reusing Yi road physical link of described the second multimode wireless device and obtain, and described multiplex/demultiplex module receives described the first data by a described road physical link.
7. radio equipment controller as claimed in claim 6, it is characterized in that, described the first data are taking frame as unit, described the first data comprise link multiplexed information, described link multiplexed information comprises: the instruction that described frame is multiplexed frame, the port number that radio equipment controller is connected with wireless device, the length of the control information of each described port and original position, the length of the business information of each described port and original position.
8. radio equipment controller as claimed in claim 7, is characterized in that, described link multiplexed information is passed through independently physical resource transmission, or transmits with Operation and Maintenance information commons physical resource.
9. the radio equipment controller as described in claim 6 to 8 any one, is characterized in that, a described road physical link is CPRI physical link.
10. a wireless communication system, comprises the radio equipment controller as described in claim 6 to 9 any one, it is characterized in that, described radio equipment controller is communicated by letter with at least two multimode wireless devices.
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| WO2008058471A1 (en) * | 2006-11-16 | 2008-05-22 | Huawei Technologies Co., Ltd. | Base station, method of processing base band signal in base station and wireless communication system |
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| JP4328732B2 (en) * | 2005-03-28 | 2009-09-09 | 日本電気株式会社 | Base station apparatus and baseband signal processing apparatus |
| CN1956564A (en) * | 2005-10-26 | 2007-05-02 | Ut斯达康通讯有限公司 | Multi-protocol signal transmission method based on CPRI in distributed base station system and its device |
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| CN101107871A (en) * | 2004-10-12 | 2008-01-16 | Lm爱立信电话有限公司 | Communication between a radio equipment control node and multiple remote radio equipment nodes |
| WO2008058471A1 (en) * | 2006-11-16 | 2008-05-22 | Huawei Technologies Co., Ltd. | Base station, method of processing base band signal in base station and wireless communication system |
| CN101188818A (en) * | 2006-11-16 | 2008-05-28 | 华为技术有限公司 | Base station, processing method for its baseband signal and wireless communication system |
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