CN101188818B - Base station, processing method for its baseband signal and wireless communication system - Google Patents
Base station, processing method for its baseband signal and wireless communication system Download PDFInfo
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Abstract
The invention relates to the wireless communication field, and discloses a base station, a base band signal treatment method in the base station, and a wireless communication system. In the invention, main control, transmission, and clock functions are uniformly provided to each base band unit inside the base station by a shared public module, the construction cost, and the maintenance and expanding cost in the later stage are reduced through the sharing. The base band unit in the identical base station can have different system types. The public module can be an independent physical unit, or a part of the base band unit in the base station. The public module and each base band module can be mutually connected through various methods such as a chain type, a star type, a bus type, a ring type, an exchange type, etc.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a base station and a baseband processing technique therein.
Background
In recent years, The development of communication technology, especially mobile communication technology, is very rapid, and The successive introduction of The first to Third Generation (3G) systems makes The influence of mobile communication on human life and work increasingly increase. The number of current mobile users is increasing, and the kinds of mobile services are becoming more and more diverse, and in the face of this expanding market, large mobile operators all over the world seek to attract and grasp mobile users by rapidly providing services of new standards, thereby occupying a favorable competitive situation in the market.
For the problem of implementing the new system service, there are two traditional solutions.
The first is based on the original system, and a base station with a new system is additionally added, so that a superimposed communication network is formed, and the communication network can provide different mobile services for users. The problem with this solution is that the investments for building such overlay networks, for purchasing equipment, acquiring sites, building sites, and operation and maintenance of the network, are considerable in terms of CAPEX (investment costs) and OPEX (operation costs).
And the second method is to detach the module of the old system and install the module of the new system into the module of the old system, thereby sharing one cabinet and realizing the multi-mode base station. The main advantage of the second solution over the first is the saving of site and cabinet.
The common problem of the two schemes is that resources are wasted, because there is no unified design between the modules of the new and old systems, resources cannot be shared, especially, the main control, transmission, clock and the like in the baseband units are completely independent, and each baseband unit has a set of related components.
Disclosure of Invention
The invention provides a base station, a base band signal processing method in the base station and a wireless communication system.
In order to solve the above technical problem, an embodiment of the present invention provides a base station, which includes at least two baseband units for baseband processing, and further includes a common module for providing at least one of a master control, a transmission, and a clock for the baseband units;
the common module is connected with each baseband unit in a direct or indirect mode;
each baseband unit uses at least one of master, transmission and clock provided by a common module.
The embodiment of the invention also provides a baseband signal processing method in the base station, which comprises the following steps:
the baseband unit directly or indirectly obtains one of master control, transmission and clock from the shared common module;
the baseband unit processes the baseband signal by using at least one of the obtained master control, transmission and clock.
The embodiment of the invention also provides a wireless communication system, which comprises at least one multi-standard base station as described above.
Compared with the prior art, the technical scheme of the invention has the main difference from the prior art that at least one of the functions of master control, transmission and clock is provided to each baseband unit in the base station by a shared common module, and each baseband unit in the prior art uses own master control, transmission and clock. Through sharing, a plurality of baseband units can share one set of components to provide main control, transmission and clock, and the cost is reduced. Through sharing, when the base station is expanded, the newly added baseband unit does not need independent main control, transmission and clock components, so that the expansion cost is reduced.
The invention is suitable for the condition that the baseband units in the same base station are of different systems, such as the condition that WCDMA, GSM and LTE are mixed in one base station. The most important difference between the baseband units of different standards is that the baseband processing is different, and each baseband unit still uses its own baseband processing logic, but shares the main control, transmission and clock. Therefore, the baseband units of different systems can conveniently form the multi-system base station, and the cost of the multi-system base station is reduced.
The frequency of the reference clock provided by the common module is a multiple or divisor of the frequency required by the baseband units of each system, and the baseband units obtain the clocks required by the baseband units respectively through frequency multiplication or frequency division, so that the problem that the clocks used by the baseband units of different systems are possibly different is solved.
The base band processing units in the same base station can share power distribution, standby power and monitoring resources, so that the cost of the multi-system base station is further reduced.
The public module can be an independent physical unit, and can be independently replaced when the public module fails, so that the maintenance cost is reduced. Each baseband unit has more uniform function, and is convenient for batch production.
The common module can also be part of a base band unit in the base station, thereby reducing the need for separate space in the subrack.
The public module and each baseband unit can be interconnected through various modes such as a chain type, a star type, a bus type, a ring type, an exchange type and the like, so that the flexibility of actually configuring the base station is increased.
Each baseband unit can be respectively connected with the radio frequency unit, so that the possibility of simultaneous failure of a plurality of baseband units due to connection failure is reduced.
Each baseband unit can also be connected in series and then connected to the radio frequency unit, so that each baseband unit can share the same radio frequency circuit, the cost is reduced, and the radio frequency unit is particularly suitable for the condition that the radio frequency unit is at a far end.
Drawings
Fig. 1 is a schematic configuration diagram of a base station apparatus according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of an interconnection interface in a base station apparatus according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of a chain-type interconnection of a baseband unit and a baseband unit including a common module in a base station apparatus according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of star-type interconnection between a baseband unit and a baseband unit including a common module in a base station device according to a first embodiment of the present invention;
fig. 5 is a schematic diagram of a base station device according to a first embodiment of the present invention, wherein a base band unit and a base band unit including a common module are interconnected in a bus type;
fig. 6 is a schematic diagram of a ring interconnection between a baseband unit and a baseband unit including a common module in a base station apparatus according to a first embodiment of the present invention;
fig. 7 is a schematic diagram of a baseband unit and a baseband unit switched interconnection including a common module in a base station apparatus according to a first embodiment of the present invention;
fig. 8 is a schematic diagram of a shared channel of an interconnection interface in a base station device according to a first embodiment of the present invention;
fig. 9 is a schematic diagram illustrating that each baseband unit is connected to a radio frequency unit in a base station device according to a first embodiment of the present invention;
fig. 10 is a schematic diagram of base station devices in which baseband units are connected in series and then connected to a radio frequency unit according to a first embodiment of the present invention;
fig. 11 is a schematic diagram of a multimode base station implementation in a base station device according to a first embodiment of the invention;
fig. 12 is a flowchart of a baseband signal processing method in a base station according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
In addition to a plurality of baseband units of various systems for baseband processing, the base station of the present invention further includes a common module for providing at least one of master control, transmission and clock for the baseband units, the common module is connected with each baseband unit in a direct or indirect manner, and each baseband unit uses at least one of the master control, transmission and clock provided by the common module. The base band units of different systems can share one set of components to provide main control, transmission and clock, and when the base station is expanded, the newly added base band unit does not need independent main control, transmission and clock components, so that the expansion cost is reduced.
A first embodiment of the present invention will be described in detail below, and this embodiment relates to a base station apparatus, and the base station in this embodiment includes baseband units of multiple standards, and a common module, which is included as one module in any one of the baseband units in the base station.
Specifically, as shown in fig. 1, the base station includes a Radio Frequency Unit (RFU) for processing radio frequency signals, baseband units (BBUs) of various systems, and baseband units including a common module, and each baseband unit includes an interconnection interface for directly or indirectly connecting with other baseband units or baseband units including a common module. The radio frequency unit is used for processing radio frequency signals; the public module is used for providing main control, transmission and clock resources for the baseband unit; the baseband units are used for performing baseband processing, and the transmission of the interconnection interface shares the master control, transmission and clock resources provided by the common module, so that each baseband unit is prevented from using own master control, transmission and clock, and the cost is reduced.
In this embodiment, the common module provides a reference clock, the frequency of the reference clock is a multiple or a divisor of the frequency required by the baseband units of each system, and each baseband unit obtains the clock required by itself through frequency multiplication or frequency division, so as to implement sharing of clock resources and solve the problem that the clocks used by the baseband units of different systems may be different. The interface for implementing extension interconnection of baseband units may be an Eia interface, and the specific structure is shown in fig. 2.
In the present embodiment, the baseband unit may be a Global System for mobile communication ("GSM") System, a Code Division Multiple Access ("CDMA") System, a Worldwide interoperability for Microwave Access ("WiMAX") System, a Wideband Code Division Multiple Access ("WCDMA") System, a Long term evolution ("LTE") System, or the like, or may be a baseband unit of a Time Division Synchronous Code Division Multiple Access ("TD-SCDMA") System, a baseband unit of a CDMA2000 System, a baseband unit of a Personal telephone System (Personal telephone System, baseband for short), or an Air interface of a PHS group (Air interface), or the like, the present invention is not limited to a specific system. Although the baseband processing logics of the baseband units of different systems are different, each baseband unit still uses the own baseband processing logic, the baseband units of different systems can conveniently form a multi-system base station by sharing the master control, the transmission and the clock, and the cost of the multi-system base station is reduced. The base band processing units in the same base station can also share power distribution, standby power and monitoring resources, so that the cost of the multi-system base station is further reduced.
The baseband unit of each system and the baseband unit containing the common module can be connected in one of the following ways:
(1) chain type interconnections in which the baseband units containing the common modules are at one end of the chain, with each baseband unit connected in series on a chain, as shown in fig. 3.
(2) The star-type interconnection, in which the baseband units containing the common modules are connected to the baseband units at a central location, is shown in fig. 4.
(3) A bus type interconnect in which the baseband units containing the common modules and each baseband unit are connected to the same bus, respectively, as shown in fig. 5.
(4) Ring-type interconnection, in which the baseband units containing the common module and each baseband unit are connected in series to the same ring, as shown in fig. 6.
(5) Switched interconnect, in which the baseband units containing the common modules and the baseband units are connected to the same switch, respectively, as shown in fig. 7.
The baseband units containing the common module can be interconnected with each other in various ways such as chain type, star type, bus type, ring type, exchange type and the like, so that the flexibility of actually configuring the base station is increased.
The base band unit of each system also comprises a base band radio frequency interface which is used for being directly or indirectly connected with the radio frequency unit and transmitting operation maintenance information (O & M information) and base band IQ data. That is to say, the interconnection interface of the baseband unit is used for transmitting master control information, transmission information and clock synchronization information, so as to realize the sharing of master control, transmission and clock resources among the multi-mode baseband units; a baseband rf interface of the baseband unit, configured to transmit O & M information and baseband IQ data, as shown in fig. 8.
Each baseband unit can be connected with the rf unit through a baseband rf interface (as shown in fig. 9), so as to reduce the possibility of simultaneous failure of multiple baseband units due to connection failure; each baseband unit may also be connected in series before being connected to the radio frequency unit (also connected in series), as shown in fig. 10, so that the baseband units may share the same baseband radio frequency channel, thereby reducing the cost, and being particularly suitable for the case where the radio frequency unit is at a far end.
Fig. 11 is a schematic diagram of a multi-system base station that may be used in practical applications, where there may be two cases, where a new baseband unit and a common module (2G BBU, 3G BBU, and BBU including the common module) are added to an existing base station, and an associated radio frequency unit (3G MRRU) is added to the base station for processing radio frequency signals; another situation is that radio frequency units (3G MRRU) related to newly added baseband units and common modules (2G BBUs, 3G BBUs, and BBUs including common modules) cannot be added to the existing base station, and thus a multi-system base station needs to be implemented by configuring a remote radio frequency unit (RRU). Of course, these are only two possible cases for implementing a multi-system base station, and the present invention is not limited to these two cases.
Therefore, in this embodiment, if an operator needs to support a new wireless standard, the baseband unit of the new standard may also be extended through the interconnection interface of the baseband unit. These BBUs of different capacities and different systems can be installed in a cabinet or rack, connected through an interconnection interface, and can selectively share power distribution, standby power and monitoring resources of a master control, transmission, clock and station. Meanwhile, a multi-system universal interface is realized between the baseband unit and the radio frequency unit, and the baseband unit of each system not only supports the direct connection with the radio frequency unit, but also can be connected with the radio frequency unit through the baseband units of other systems. In addition, because the function module for baseband processing is a baseband unit and the interconnection interface between the baseband units is realized, the base station equipment can be optimized according to the mainstream requirements of operators, and a plurality of expansion slot positions are reserved instead of initial configuration. An operator can configure a baseband unit with small capacity according to needs, and when the baseband unit with large capacity needs to be configured in the future, a new baseband unit is expanded through an interconnection interface between BBUs.
In addition, the baseband unit can be installed in a miniaturized and distributed mode, the purpose of hiding the baseband unit is achieved, and the problem of bearing is solved. Therefore, as long as the original mobile phone operator already has the base station address, the baseband unit can be installed by directly utilizing the residual space in the outdoor macro base station and the residual space of the cabinet or the rack of the indoor macro base station machine room without additionally selecting the address of the base station, and the problem that the base station address of the mobile phone operator is difficult to select is solved. Meanwhile, the equipment is miniaturized and dispersedly installed, so that a mobile phone operator can greatly shorten the time for establishing the network and realize quick network establishment.
In the embodiment, each baseband unit can share a common module to provide uniform control and transmission interface functions, so that management and maintenance of the multi-system base station are simplified, and the requirement of an operator on the maintainability of the base station is well met.
A second embodiment of the present invention relates to a base station apparatus, and this embodiment is substantially the same as the first embodiment except that in the first embodiment, a common module is included in one baseband unit in the base station, whereas in the present embodiment, the common module is an independent physical unit.
That is, in the first embodiment, in order to reduce the requirement for an independent space in the subrack, the common module may be included in one baseband unit in the base station, while in the present embodiment, the common module is set as an independent physical unit, so that the common module may be replaced individually when the common module fails, thereby reducing the maintenance cost, and moreover, the functions of the baseband units are uniform, which facilitates mass production.
A third embodiment of the present invention relates to a baseband signal processing method in a base station, and a specific flow is shown in fig. 12.
In step 1210, the baseband units of each system in the base station directly or indirectly obtain the resources of master control, transmission and clock from the shared common module. For example, the base station includes a GSM baseband unit, a CDMA baseband unit, a WiMAX baseband unit, and an LTE baseband unit, and the baseband units of these systems obtain resources of main control, transmission, and clock from the common module. Of course, the baseband unit in this embodiment may also be in other systems, such as WCDMA system, TD-SCDMA system, CDMA2000 system, PHS system, trunking system, or AIE system, and the present embodiment is not limited in detail.
Next, in step 1220, the baseband unit of each system processes the baseband signal using the obtained master control, transmission and clock. For example, the frequency of the reference clock provided by the common module is a multiple or a divisor of the frequency required by the baseband unit of each system, and then the baseband unit of each system multiplies or divides the frequency of the clock provided by the common module to obtain the clock required by itself, and processes the baseband signal by using the clock resource.
Therefore, in the embodiment, a plurality of baseband units of different systems can share one set of components to provide main control, transmission and clock, so that the cost is reduced, and when the base station is expanded, the newly added baseband unit does not need independent main control, transmission and clock components, so that the expansion cost is further reduced.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (11)
1. A base station comprises at least two baseband units for baseband processing, and is characterized by further comprising a common module for providing at least one of master control, transmission and clock resources for the baseband units;
the common module is connected with each baseband unit in a direct or indirect mode;
each baseband unit uses at least one of the master, transport and clock resources provided by the common module,
wherein, the at least two baseband units for baseband processing belong to at least two systems respectively.
2. The base station of claim 1, wherein the standard of the baseband unit comprises:
global mobile communication system standard, code division multiple access standard, microwave access global intercommunication standard, wideband code division multiple access standard, time division synchronous code division multiple access standard, code division multiple access standard 2000 standard, personal hand-held telephone system standard, cluster standard, long-term evolution standard and air interface evolution standard.
3. The base station of claim 1, wherein the baseband units in the same base station share power distribution, backup power, and monitoring resources.
4. The base station according to claim 1, characterized in that the common module is a separate physical unit or that the common module exists as part of a baseband unit in one of the base stations.
5. The base station of claim 4, wherein the common module or the baseband unit comprising the common module and each baseband unit are connected by one of:
chain type interconnection, wherein the common module or the baseband unit containing the common module is arranged at one end of the chain, and each baseband unit is connected in series on one chain;
the common module or the baseband unit containing the common module is connected with each baseband unit at the central position;
the public module or the baseband unit containing the public module and each baseband unit are respectively connected with the same bus;
the public module or the baseband unit containing the public module and each baseband unit are respectively connected in series on the same ring;
and the public module or the baseband unit containing the public module and each baseband unit are respectively connected with the same switch.
6. The base station of claim 1, wherein the baseband unit comprises a first interface for connecting to the common module or other baseband units, the first interface transmitting at least one of a master, a transport, and a clock.
7. The base station of claim 1, further comprising at least one radio unit for radio frequency signal processing;
the baseband unit further comprises a second interface, which is used for directly or indirectly connecting with the radio frequency unit and transmitting the operation maintenance information and baseband IQ data of the radio frequency unit.
8. The base station of claim 7, wherein each baseband unit is connected to the rf unit through a second interface; or,
and the baseband units are connected in series through the second interface and then connected with the radio frequency unit, and the baseband units share the same baseband radio frequency channel.
9. A method for processing baseband signals in a base station, comprising the steps of:
the baseband unit directly or indirectly obtains one of master control, transmission and clock resources from the shared common module;
the baseband unit processes the baseband signal by using at least one of the acquired main control, transmission and clock resources, wherein each baseband unit in the same base station belongs to at least two systems respectively.
10. The baseband signal processing method according to claim 9, wherein the format of the baseband unit comprises:
global mobile communication system standard, code division multiple access standard, microwave access global intercommunication standard, wideband code division multiple access standard, time division synchronous code division multiple access standard, code division multiple access standard 2000 standard, personal hand-held telephone system standard, cluster standard, long-term evolution standard and air interface evolution standard.
11. A wireless communication system, characterized in that it comprises at least one base station according to any of claims 1 to 8.
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| CN2006101491237A CN101188818B (en) | 2006-11-16 | 2006-11-16 | Base station, processing method for its baseband signal and wireless communication system |
| PCT/CN2007/003229 WO2008058471A1 (en) | 2006-11-16 | 2007-11-15 | Base station, method of processing base band signal in base station and wireless communication system |
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| CN2006101491237A CN101188818B (en) | 2006-11-16 | 2006-11-16 | Base station, processing method for its baseband signal and wireless communication system |
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| CN102752781B (en) * | 2008-05-23 | 2016-06-15 | 华为技术有限公司 | Wireless base station device, radio equipment controller and wireless device |
| CN102395227B (en) * | 2008-12-17 | 2014-09-17 | 华为技术有限公司 | Multiplex method of communication signal, wireless communication system and radio equipment controller |
| CN101489156B (en) * | 2008-12-17 | 2011-11-16 | 华为技术有限公司 | Multiplexing method for communication signal, radio communication system and radio equipment controller |
| US8199702B2 (en) * | 2008-12-26 | 2012-06-12 | Rockstar Bidco Lp | Baseband recovery in wireless networks, base transceiver stations, and wireless networking devices |
| CN102026422B (en) * | 2009-09-10 | 2017-06-20 | 上海华为技术有限公司 | The method and Multi-Mode Base Station of a kind of realizing transmission line sharing of multi-mode base station |
| CN101778497B (en) * | 2009-12-30 | 2013-01-30 | 华为技术有限公司 | Method for obtaining software and communication equipment |
| CN102340470A (en) * | 2010-07-20 | 2012-02-01 | 中兴通讯股份有限公司 | Baseband processing system and method |
| CN102170714A (en) * | 2011-03-25 | 2011-08-31 | 中兴通讯股份有限公司 | Multi-mode driving method, system and terminal |
| WO2011144053A2 (en) * | 2011-05-20 | 2011-11-24 | 华为技术有限公司 | Multimode base station, method and apparatus for communication in multimode base station |
| JP5661193B2 (en) * | 2011-10-06 | 2015-01-28 | 三菱電機株式会社 | Base station apparatus and communication system |
| CN102685934B (en) * | 2011-12-22 | 2014-06-25 | 华为技术有限公司 | Wireless access system and wireless service processing method |
| CN105657831B (en) * | 2014-12-03 | 2020-01-14 | 中兴通讯股份有限公司 | Baseband resource management method and device |
| CN111400640B (en) * | 2020-04-10 | 2023-09-22 | 中国铁塔股份有限公司 | Site holographic information management system, construction method and construction device |
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| CN101188817A (en) * | 2006-11-15 | 2008-05-28 | 华为技术有限公司 | Multi-system base station, its signal receiving and transmission method and wireless communication network |
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| Publication number | Publication date |
|---|---|
| WO2008058471A1 (en) | 2008-05-22 |
| CN101188818A (en) | 2008-05-28 |
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