CN109963290B - Multi-service indoor coverage system and working method - Google Patents
Multi-service indoor coverage system and working method Download PDFInfo
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- CN109963290B CN109963290B CN201910133709.1A CN201910133709A CN109963290B CN 109963290 B CN109963290 B CN 109963290B CN 201910133709 A CN201910133709 A CN 201910133709A CN 109963290 B CN109963290 B CN 109963290B
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- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
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Abstract
The invention discloses a multi-service indoor coverage system, which comprises a capacity convergence unit, a capacity distribution unit and a capacity remote unit, wherein the capacity convergence unit is connected with the capacity distribution unit; in a downlink, the capacity convergence unit uniformly transmits various introduced access signals to the capacity distribution unit, and the capacity distribution unit transmits signals output by the capacity convergence unit to the capacity remote unit. The invention also discloses a working method of the multi-service indoor coverage system, the system and the method can overcome the defects of the existing indoor distribution system, and can meet the requirements of the indoor coverage system when 2G, 3G, 4G and other multi-services coexist in the future 5G era.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a multi-service indoor coverage system and a working method of the multi-service indoor coverage system.
Background
With the continuous development of science and technology, mobile communication technology rapidly evolves from 1G to 4G for large-scale application, and then the development of subsequent 5G and 6G drives the explosive growth of broadband data services such as mobile internet, internet of things and the like, the coverage of signals of different systems is particularly important when the indoor broadband data services are mainly used as data services, and meanwhile, due to the coexistence of signals of multiple systems, such as 2G, 3G, 4G or 5G and 6G, great challenges are brought to the traditional network coverage and optimization. Traditionally, indoor coverage systems often employ the following:
1) by adopting the existing single-frequency-band optical fiber repeater equipment, multiple pieces of equipment are adopted in a multi-frequency-band and multi-system coverage cell, which often causes the problems of cost rise, installation complexity and the like;
2) the coverage is performed by adopting a coverage mode of a BBU (Building base band Unit) + RRU (Remote Radio Unit), as RRUs can basically support only a single frequency and cannot meet the requirements of multiple frequencies and multiple systems, and as an information source adopted in a coverage area may not be the same main equipment manufacturer, the BBU cannot be used, and further the implementation of the whole coverage scheme is influenced;
3) with a micropower indoor distribution system having an access unit, an extension unit, and a radio frequency unit, this may result in a failure to meet the requirements of large capacity and large bandwidth of 5G due to limitations on access unit architecture and bandwidth factors.
In order to solve the problems of the indoor coverage in the mobile communication field proposed as above, a few companies have also conducted technical studies and applied for related patent publications. For example, the invention patent with application number WO2013097199a1, "clock switching method, apparatus and indoor distributed system with repeater as relay", discloses that the coverage of indoor signals is realized by using a three-layer network architecture including MAU (access unit), MEU (extension unit), MRU (remote unit), etc., but the patent mainly describes how to synchronize clocks among MAU, MEU and MRU, and relates to how to cover indoors by using these three parts, and there is no patent protection term of the three parts. The invention patent with application number CN201610703805 discloses an indoor distribution system with multiple wireless communication systems integrated and a working method thereof, and the main idea Of the invention is still to adopt a traditional coverage mode, wherein different types Of single-frequency RRUs or repeaters are combined after passing through a Point Of Interface (POI) and then are covered indoors through a passive device network (such as a power divider, a coupler, a combiner, etc.). The invention patent with application number CN201310317496 discloses a multimode digital DAS system supporting multi-source access, which adopts a three-level network architecture covering mode of AU (access unit) + EU (extension unit) + RU (remote unit), but has the defects that AU adopts a method of radio frequency coupling base station signals, the capacity of the whole covering network is firstly accessed to the capacity of the base station and is not suitable for 5G application, in addition, the signal bandwidth in the invention can only support 10MHz, 20MHz, 40MHz and 60MHz, and the application scene is limited; meanwhile, the RU can only support 4 frequency bands, and the system cannot be applied under the condition that 2G, 3G, 4G and 5G coexist in the future.
Disclosure of Invention
In order to overcome the problems and disadvantages, the present invention provides a novel indoor coverage system and a method for operating the same. The whole indoor coverage system comprises a capacity convergence unit, a capacity distribution unit and a capacity remote unit, wherein the capacity convergence unit is connected with capacity access units of different types, and can adapt to flexible access of various system signals. And high-speed digital optical fiber transmission is adopted between the capacity convergence unit and the capacity distribution unit, so that the whole coverage system has a function of randomly calling capacity according to scene requirements, and the high-capacity requirement of 5G is met.
Based on this, in a first aspect, an embodiment of the present invention provides a multi-service indoor coverage system, including a capacity aggregation unit, a capacity distribution unit, and a capacity zoom-out unit, where the capacity aggregation unit is connected to the capacity distribution unit, and the capacity distribution unit is connected to the capacity zoom-out unit;
in a downlink, a capacity aggregation unit is used for introducing various access signals and uniformly transmitting the introduced various access signals to a capacity distribution unit, the capacity distribution unit transmits signals output by the capacity aggregation unit to a capacity remote unit, and the capacity remote unit transmits the signals output by the capacity distribution unit to an area needing to be covered;
the capacity remote unit comprises a main capacity remote unit and a capacity remote unit, the main capacity remote unit is connected with the capacity distribution unit, the capacity remote unit is connected to the main capacity remote unit, and the main capacity remote unit and the capacity remote unit are respectively adaptive to the modes of multiple access signals and used for realizing the coverage of signals of different modes;
in the uplink, the capacity remote unit transmits a reverse signal back to the capacity aggregation unit through a reverse process of the downlink, and the capacity aggregation unit transmits the signal to a corresponding external network.
In a second aspect, an embodiment of the present invention further provides a working method of a multi-service indoor coverage system, where in an uplink, the working method includes: the radio frequency capacity access unit converts the base station radio frequency signal coupled by the coupler into a digital transmission signal and outputs the digital transmission signal to the capacity convergence unit; the wireless capacity access unit converts the received space wireless signals into digital transmission signals and outputs the digital transmission signals to the capacity convergence unit; the baseband capacity access unit converts the received 2G, 3G, 4G or NB-IoT signals into digital transmission signals and outputs the digital transmission signals to the capacity convergence unit; the capacity convergence unit analyzes the received digital transmission signals of the radio frequency capacity access unit, the wireless capacity access unit and the baseband capacity access unit, packages and compresses the analyzed digital baseband signals of different types and the digital signals received by the capacity convergence unit from the DU of the 5G system connected with the capacity convergence unit together to convert the digital baseband signals into digital optical signals, and outputs the digital optical signals to the capacity distribution unit; the capacity distribution unit analyzes the received digital optical signals to obtain first digital signals and second digital signals, and the first digital signals and the second digital signals are packed and compressed to obtain digital optical signals which are transmitted to the capacity remote unit; the main capacity remote unit analyzes the received digital optical signal generated by the capacity distribution unit to obtain a first digital signal and a second digital signal, outputs the first digital signal through the covering antenna, and outputs the second digital signal to the capacity remote unit; the received second digital signal is analyzed by the capacity remote unit and is output through the covering antenna; in the uplink, the capacity remote unit receives the signal of the coverage area, and transmits the signal back to the external network or the capacity convergence unit through the reverse process of the steps.
According to the system and the method, through the unified signal introduction of the capacity convergence unit, the signal division of the capacity distribution unit and the capacity remote unit and the respective transmission of the divided signals by the capacity remote unit, the low-cost and quick system capacity expansion is realized, the indoor coverage system capable of realizing multi-system signal coverage can be quickly constructed, the defects of the existing indoor distribution system can be overcome, the requirements of NB-IoT, 2G, 3G, 4G, WLAN and other services on the indoor coverage system in the coexistence of the NB-IoT, 2G, 3G, 4G, WLAN and the like in the future 5G era can be met, and the system and the method have very wide application prospects.
Drawings
FIG. 1 is a schematic block diagram of a multi-service indoor coverage system according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of various types of capacity access units of a multi-service indoor coverage system according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a radio frequency capacity access unit according to an embodiment of the present invention;
FIG. 4 is a schematic block diagram of a baseband capacity access unit according to an embodiment of the present invention;
FIG. 5 is a schematic block diagram of a wireless capacity access unit according to an embodiment of the present invention;
fig. 6 is a schematic block diagram of a capacity aggregation unit of a multi-service indoor coverage system according to an embodiment of the present invention;
fig. 7 is a schematic block diagram of a capacity distribution unit of a multi-service indoor coverage system according to an embodiment of the present invention;
fig. 8 is a schematic block diagram of a remote capacity unit of a multi-service indoor coverage system according to an embodiment of the present invention;
fig. 9 is a schematic block diagram of a master remote unit according to an embodiment of the present invention;
FIG. 10 is a functional block diagram of a remote unit for drawing away a volume according to an embodiment of the present invention;
fig. 11 is a flowchart illustrating a method of operating a multi-service indoor coverage system according to an embodiment of the present invention;
fig. 12 is a flowchart illustrating a method of operating a multi-service indoor coverage system according to still another embodiment of the present invention;
fig. 13 is a schematic diagram illustrating a capacity calling of a multi-service indoor coverage system according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 schematically shows a block diagram illustrating the structure of a multi-service indoor coverage system according to an embodiment of the present invention, as shown in fig. 1,
the multi-service indoor coverage system comprises various types of capacity access units 2, capacity aggregation units 3, capacity distribution units 4 and capacity remote units 5, wherein each capacity access unit 2 is connected with the capacity aggregation unit 3, the capacity aggregation units 3 are connected with the capacity distribution units 4, and the capacity distribution units 4 are connected with the capacity remote units 5. As shown in fig. 8, the remote capacity unit is implemented to include a main remote capacity unit 501 and a remote capacity unit 502, where the main remote capacity unit 501 is connected to the capacity distribution unit 4, and the remote capacity unit 502 is connected to the main remote capacity unit 501. Each capacity remote unit is respectively designed to be adaptive to the standard signal of the corresponding frequency band, for example, the main capacity remote unit is designed to be adaptive to the signal frequency band of the traditional 2G/3G/4G system, and the slave capacity remote unit is designed to be adaptive to the signal frequency band of the emerging 5G system, so that the signals of different standards transmitted by the capacity distribution unit 4 can be respectively transmitted to the corresponding main capacity remote unit or slave capacity remote unit according to the bandwidth characteristics, and the corresponding main capacity remote unit or slave capacity remote unit outputs the signals through antenna coverage, thereby realizing indoor coverage of the multi-service multi-standard signals.
In a downlink, a plurality of types of capacity access units 2 uniformly introduce a plurality of types of access signals into a capacity convergence unit 3, the capacity convergence unit 3 uniformly transmits the signals introduced by the plurality of types of capacity access units 2 to a capacity distribution unit 4, the capacity distribution unit 4 transmits the signals output by the capacity convergence unit 3 to a main capacity remote unit 501, and the main capacity remote unit 501 transmits the signals output by the capacity distribution unit 4 to an area needing to be covered via the main capacity remote unit or a corresponding capacity remote unit 502. Thus, the remote capacity unit 5 can output the signals transmitted by the capacity distribution unit 4 according to different service types (for example, according to whether the transmitted signals are the conventional 2G/3G/4G service or the emerging 5G service, and then perform signal division and transmission according to the frequency band channel designs of the remote capacity unit and the remote capacity unit).
Illustratively, after data or service signals are output from an external network, the data or service signals enter core networks of different systems, and then enter base stations of BTSs of the systems, nodebs of 3G systems, and BBUs of 4G systems, radio frequency signals coupled from the base stations, spatially coupled wireless signals, and baseband signals coupled by the BBUs are all uniformly introduced into the capacity aggregation unit 3 through the capacity access unit 2, the capacity aggregation unit 3 transmits the capacity into the capacity distribution unit 4 through a star network, the capacity distribution unit 4 transmits signals received from the capacity aggregation unit 3 to the master capacity remote unit 501, and the master capacity remote unit 501 transmits signals output by the capacity distribution unit 4 to an area to be covered through the master capacity remote unit or the corresponding capacity remote unit 502.
In the uplink, the capacity remote unit 5 transmits a reverse signal back to the capacity access unit 2 through a reverse process of the uplink, and the capacity access units 2 of various types transmit the signal to an external network.
The implementation principle and implementation manner of each unit will be shown based on a specific implementation example, and it should be understood by those skilled in the art that the specific implementation example below is only a preferred example, and other implementation manners based on the same concept should also belong to the protection scope of the present invention.
Specifically, as a preferred embodiment, the various types of capacity access units 2 shown in fig. 2 are implemented to include a radio frequency capacity access unit 201 for receiving base station-coupled radio frequency signals, a baseband capacity access unit 202 for receiving BBU-coupled baseband signals, and a wireless capacity access unit 203 for receiving spatially-coupled wireless signals.
The operating principle of the radio frequency capacity access unit 201 is as follows: the base station radio frequency signal is directly coupled through the coupler, and is converted into a digital transmission signal which is suitable for optical fiber, network cable or other medium transmission and conforms to the own protocol after passing through the radio frequency capacity access unit 201, and the preferred own protocol can adopt the CPRI protocol of optical fiber transmission. Preferably, the number of channels of the radio frequency signals that the radio frequency capacity access unit 201 can receive may be set to be greater than or equal to 4.
Specifically, as shown in fig. 3, the rf capacity access unit 201 is implemented to include a media duplexer unit 2011, a digital signal processing unit 2012 and a protocol processing unit 2013, where the media duplexer unit 2011 is configured to filter the uplink rf signals and the downlink rf signals of four channels. The digital signal processing unit 2012 is a multi-channel integrated processing unit, and is configured to convert the downlink radio frequency signals of the four channels into digital signals, and convert the uplink digital signals into radio frequency signals. The protocol processing unit 2013 is configured to pack downlink digital signals of four channels, convert the digital signals into digital optical signals according to a CPRI protocol after the digital optical signals are packed, pack downlink radio frequency signals, analyze the downlink radio frequency signals according to received CPRI protocol signals, and decompose the downlink radio frequency signals into four-channel digital signals.
The operating principle of the baseband capacity access unit 202 is as follows: the BBU of 2G, 3G, 4G, or NB-IoT signals is transmitted to the baseband capacity access unit 202 by using the CPRI/IR protocol through optical fiber transmission, and the baseband capacity access unit 202 parses, re-encodes, and converts the signals of different systems into digital transmission signals conforming to its own protocol suitable for optical fiber, network cable, or other medium transmission, where the preferred own protocol may use the CPRI protocol of optical fiber transmission. Preferably, the number of optical ports that the baseband capacity access unit 202 can receive may be set to be equal to or greater than 8.
Specifically, as shown in fig. 4, the baseband capacity access unit 202 includes a protocol conversion unit 2021 and a protocol processing unit 2022, where the protocol conversion unit 2021 and the protocol processing unit 2022 are both multi-channel units, and the protocol conversion unit 2021 is configured to extract signals from multiple BBUs of different systems based on the CPRI/IR protocol through an optical fiber. The protocol processing unit 2022 is configured to, after the eight extracted BBU signals are packed, convert the eight BBU signals into digital optical signals according to a CPRI protocol, decompose the CPRI protocol signals received by downlink signal packing into eight channel digital signals, and transmit the eight channel digital signals to the protocol conversion unit 2021.
The working principle of the wireless capacity access unit 203 is as follows: after receiving the spatial wireless signal through the wireless antenna, the spatial wireless signal is converted into a digital transmission signal conforming to a self-owned protocol suitable for transmission through an optical fiber, a network cable or other media through the wireless capacity access unit 203, and the preferred self-owned protocol may adopt a CPRI protocol of optical fiber transmission. Preferably, the number of signal channels that can be processed by the wireless capacity access unit 203 may be set to 4 or more.
Specifically, as shown in fig. 5, the radio capacity access unit 203 includes a cavity duplexer unit 2031, an uplink amplification and uplink and downlink filtering unit 2032, an uplink amplification and uplink and downlink filtering unit 2033, and a protocol processing unit 2034. The cavity duplexer unit 2031 is configured to perform filtering and isolation operations on the uplink and downlink radio frequency signals. The uplink amplifying and filtering unit 2032 is configured to filter the downlink radio frequency signals of the four channels, and filter and power amplify the uplink radio frequency signals. The digital signal processing unit 2033 is configured to convert the downlink radio frequency signals of the four channels into digital signals, and convert the uplink digital signals into radio frequency signals. The protocol processing unit 2034 is configured to package the downlink digital signals of the four channels, convert the downlink digital signals into digital optical signals according to the CPRI protocol, and analyze the CPRI protocol signals received by the uplink package, so as to decompose the CPRI protocol signals into four channel digital signals.
As a preferred embodiment, as shown in fig. 6, the capacity aggregation unit 3 is implemented as a DU connected to the 5G system by an optical fiber or a network cable (for example, the eCPRI protocol and 25Gbps ethernet) by connecting the above-mentioned various capacity access units via corresponding optical ports. In this case, the signals introduced by the capacity aggregation unit 3 include digital signals transmitted by DUs in addition to the above-mentioned multiple types of access signals, and at this time, the capacity aggregation unit 3 transmits the signals introduced by the multiple types of capacity access units 2 and the digital signals transmitted by DUs to the capacity distribution unit 4 in a unified manner. The capacity aggregation unit 3 may connect the plurality of capacity distribution units 4 through a star connection. Each type of access signal is based on the own protocol, the CPRI protocol or the eccri protocol, and enters the protocol analysis unit 301 of the capacity aggregation unit 3 through each type of access unit 2 or optical fiber to perform protocol analysis (corresponding analysis processing is performed according to the adopted data packing and compression protocol, the protocol analysis unit 301 is a multi-port protocol analysis unit), a digital baseband signal is extracted, the analyzed different types of digital baseband signals are sent to the data packing and compression processing unit 302 to perform data packing and compression processing according to the CPRI protocol, and finally, the packed and compressed digital signals are converted into digital optical signals through the photoelectric conversion signal unit 303 to be output. Preferably, the capacity aggregation unit 3 can be implemented to support (through corresponding optical ports and ethernet interfaces) one-path radio frequency capacity access unit 201, and the optical fiber data rate is 10 Gbps; one path of baseband capacity access unit 203 and the data rate of the optical fiber are 10 Gbps; one path of wireless capacity access unit 202 and the data rate of the optical fiber are 10 Gbps; and one 25Gbps Ethernet interface, for example, is arranged through an optical port and an Ethernet port to realize the access of corresponding signals.
The digital optical signal based on the CPRI protocol, which is packed by the capacity aggregation unit, is transmitted to the capacity distribution unit 4 through an optical fiber. Preferably, the capacity convergence unit 3 is connected with the capacity distribution unit in a star manner, the number of star connections is greater than or equal to 6, and the optical fiber data rate is 40Gbps or 100 Gbps.
Specifically, as a preferred embodiment, the capacity distribution unit is implemented by connecting a WLAN switch, a camera switch or an electronic billboard switch, and the like to a multimedia switch, wherein the connection to the switch is a gigabit ethernet. It should be noted that, the connection between the capacity distribution unit and the multimedia switch and the 5G system may be arranged according to the requirement, and when such an application scenario does not need to be expanded, the capacity distribution unit may be selected to be connected only with the capacity convergence unit and the capacity zoom-out unit.
The capacity distribution unit 4 transmits the signal output from the capacity aggregation unit 3 and the signal received from the WLAN switch to the capacity pulling unit 5. Specifically, as shown in fig. 7, the capacity distribution unit 4 includes a first protocol analysis unit 401A and a second protocol analysis unit 401B, a transparent transmission analysis unit 402, a data packing and processing unit 403, and a photoelectric conversion unit 404. The capacity distribution unit 4 analyzes the digital optical signal (received from the capacity aggregation unit) transmitted through the optical fiber according to the CPRI protocol via the first protocol analysis unit 401A to obtain a first digital signal, processes the WLAN digital signal transmitted through the WLAN switch via the gigabit network line via the transparent transmission analysis unit 402 to obtain a first transparent transmission digital signal, and the capacity distribution unit 4 can also receive the baseband signal from the 5G system DU and analyze the baseband signal according to the eccri protocol via the second protocol analysis unit 401B to obtain a second digital signal. In a specific implementation, the baseband signal from the 5G system received by the capacity distribution unit 4 may be implemented by directly connecting the capacity aggregation unit to the DU of the 5G system through an optical fiber as in the above embodiment, or may be implemented by directly connecting the capacity distribution unit 4 itself to the DU of the 5G system, and both may be implemented alternatively according to user requirements. When the baseband signal from the 5G system received by the capacity distribution unit is from the capacity aggregation unit, the second protocol analysis unit 401B performs protocol analysis on the digital optical signal transmitted through the optical fiber according to the eccri protocol analysis to obtain a second digital signal. In addition, as a preferred embodiment, the capacity distribution unit 4 is also capable of receiving digital signals transmitted from other multimedia networks, such as cameras, electronic billboards, and other switches, and analyzing the digital signals by the transparent transmission analysis unit 402 to obtain a second transparent transmission digital signal. After being subjected to data packing and compression processing in the data packing and processing unit 403 in the capacity distribution unit 4, the four signals are collectively subjected to the photoelectric conversion unit 404, generate digital optical signals with a data rate of 40Gbps based on the CPRI protocol, and transmit the digital optical signals to the capacity remote unit 5.
Specifically, as a preferred embodiment, in order to facilitate indoor coverage engineering construction, the capacity distribution unit 4 may support self serial connection, and the connection between the capacity distribution unit 5 and the capacity remote unit adopts star connection, and the capacity distribution unit 4 can realize remote power supply to the capacity remote unit 5.
In a preferred embodiment, the number of serial connections of the capacity distribution unit 4 is greater than or equal to four, and the number of star connection main capacity remote units is greater than or equal to eight, and the main capacity remote units can be powered by remote optical cables. The capacity distribution unit 4 and the capacity remote unit 5 adopt high-speed digital optical fiber for data transmission, and the data transmission rate is not lower than 40 Gbps.
Preferably, the main remote volume unit 501 or/and the remote volume unit 502 comprises at least six channels (for example, eight channels may be included). The high-speed ethernet is used between the main remote capacity unit 501 and the remote capacity unit 502 for data transmission, the data transmission rate is 10Gbps, and the main remote capacity unit 501 supplies power to the remote capacity unit 502 connected thereto.
As shown in fig. 9, which is a schematic block diagram of the main remote capacity unit 501, the digital optical signal from the capacity distribution unit 4 is analyzed by the protocol analysis unit 5011 and the data decompression processing unit 5012 of the main remote capacity unit 501 according to the protocol, and then divided into a first digital signal, a second digital signal, and a transparent transmission digital signal, wherein the data distribution unit 5014 distributes the first digital signal to the data processing unit 5016, distributes the second digital signal to the photoelectric conversion unit 5015, distributes the transparent transmission digital signal to the multimedia service transparent transmission unit 5013, the data processing unit 5016 distributes the first digital signal according to the preset number of channels (i.e. according to the channel design of hardware), and after decomposition, the first digital signal is converted by the digital-to-analog conversion unit 5017 and transmitted to the coverage antenna MP1 to the coverage antenna MPN. The second digital signal is repackaged according to the ethernet protocol by passing through the optical-to-electrical conversion unit 5015 and transmitted to the remote unit 502. The transparent transmission digital signal 4 is transmitted to the multimedia devices such as the camera and the electronic billboard through the multimedia transparent transmission unit 5013 through the ethernet. In a specific implementation, the master capacity remote unit and the slave capacity remote unit may be designed by hardware according to requirements, so that the master capacity remote unit and the slave capacity remote unit respectively correspond to one type of standard signal bandwidth, for example, the master capacity remote unit is designed to be capable of supporting 5G signals and/or WLAN signals, the slave capacity remote unit is designed to be capable of supporting NB-IoT/2G/3G/4G system signals, and vice versa. In this way, in the data transmission process, when the capacity aggregation unit performs data packing and compression, signals of different systems can be identified (for example, which type of signal is identified by a channel bit) according to the channel design of the capacity aggregation unit, then the capacity distribution unit analyzes the signal transmitted by the capacity aggregation unit according to the data transmission protocol and the signal identification protocol agreed during transmission, and divides the signal into a first digital signal and a second digital signal, where the first digital signal can be agreed as a signal transmitted by the main capacity remote unit, and the second digital signal can be agreed as a signal transmitted by the capacity remote unit, so that the capacity distribution unit can analyze the signal according to the agreed protocol and the signal identification to obtain the first digital signal and the second digital signal, and the like. Then, the main remote capacity unit may perform distribution processing on the received signal according to its own channel design and frequency band design, so as to output the signal via the appropriate remote capacity unit.
In a preferred embodiment, the main remote capacity unit 501 may be designed to be capable of transmitting the first digital signal as a signal including 4G and 5G system signals, or WLAN and 5G system signals, where the number of coverage antennas MPN is greater than or equal to 4, the transparent transmission ethernet data rate is giga, and POE power supply is supported, and the ethernet data rate between the main remote capacity unit and the remote capacity unit is ten trillion, and POE + + power supply is supported.
As shown in fig. 10, which is a schematic block diagram of the capacity pull-out unit 502, the second digital signal transmitted by the main capacity pull-out unit 501 according to the gigabit ethernet protocol is analyzed by the protocol analysis unit 5021 of the capacity pull-out unit 502 to obtain a service digital signal, which is decomposed according to a preset number of channels in the digital processing module 5022, converted by the digital-to-analog and analog-to-digital conversion unit 5023, and transmitted to the coverage antennas SP1 and SP 2. In a preferred embodiment, the second digital signal that the remote unit 502 can be designed to be able to transmit includes NB-IoT/2G/3G system signals or NB-IoT/2G/3G/4G system signals, respectively. The number of coverage antennas of the remote unit 502 may be 1 or 2.
The system according to the embodiment can adapt to flexible access of various system signals through different types of capacity access units, including RF-CAU for radio frequency coupling and BU-CAU for baseband access; WL-CAU for wireless or microwave access. Meanwhile, according to the system of the embodiment, by designing the master-slave capacity remote unit adaptive to the bandwidth characteristics of the signals of different systems, the comprehensive coverage of the signals of various systems can be realized, the system can be flexibly applied, and the requirements of different scenes on coverage services can be met. And high-speed digital optical fiber transmission is adopted between the capacity convergence unit and the capacity distribution unit. The indoor distribution system can overcome the defects of the existing indoor distribution system, and can meet the requirements of the indoor coverage system when multiple services such as NB-IoT, 2G, 3G, 4G, WLAN and the like coexist in the future 5G era.
Fig. 11 schematically shows a flowchart of a working method of a multi-service indoor coverage system according to an embodiment of the present invention, in a specific application, a 5G signal of a system in an embodiment of the present invention may be obtained by directly connecting a capacity distribution unit to a DU of a 5G system, or may be obtained by connecting a capacity aggregation unit to a DU of a 5G system and analyzing a digital optical signal output from the capacity aggregation unit, where the former is taken as an example for explanation, as shown in fig. 11, in this embodiment, the working method in a downlink includes the following steps:
step S601: the radio frequency capacity access unit converts the base station radio frequency signal coupled by the coupler into a digital transmission signal and outputs the digital transmission signal to the capacity convergence unit. The radio frequency signal can be obtained in real time through the radio frequency capacity access unit of the multi-service indoor coverage system.
Step S602: the wireless capacity access unit converts the received space wireless signals into digital transmission signals and outputs the digital transmission signals to the capacity convergence unit.
Step S603: the baseband capacity access unit converts the received 2G, 3G, 4G or NB-IoT signals into digital transmission signals and outputs the digital transmission signals to the capacity convergence unit.
Different signals are processed by the corresponding capacity access units and then are uniformly introduced into the capacity convergence unit, and the processing of step S604 is performed.
Step S604: the capacity convergence unit analyzes the received digital transmission signals of the radio frequency capacity access unit, the wireless capacity access unit and the baseband capacity access unit, packages and compresses the analyzed digital baseband signals of different types to convert the digital baseband signals into digital optical signals, and outputs the digital optical signals to the capacity distribution unit. The implementation of which can be referred to the system part described above.
Step S605: the capacity distribution unit analyzes the received digital optical signal to obtain a first digital signal, receives a baseband signal of a 5G system DU as a second digital signal, packs and compresses the first digital signal and the second digital signal to obtain a digital optical signal and transmits the digital optical signal to the capacity remote unit.
Step S606: the capacity remote unit analyzes the received digital optical signal output by the capacity distribution unit to obtain a service digital signal, and outputs the service digital signal through the covering antenna. The remote capacity unit comprises a main remote capacity unit and a remote capacity unit. The main capacity remote unit analyzes the received digital optical signal generated by the capacity distribution unit to obtain a service digital signal, wherein the obtained service digital signal comprises a first digital signal adaptive to the frequency band of the main capacity remote unit and a second digital signal adaptive to the frequency band of the capacity remote unit. Exemplarily, the first digital signal comprises digital signals of 4G and 5G systems, and the second digital signal comprises digital signals of NB-IoT, 2G and 3G systems; or illustratively, the first digital signal comprises digital signals of either WLAN and 5G systems, and the second digital signal comprises digital signals of NB-IoT, 2G, 3G, and 4G systems. The main capacity remote unit outputs the first digital signal through the covering antenna and outputs the second digital signal to the capacity remote unit. The main capacity remote unit outputs the second digital signal to the capacity remote unit through the Ethernet, and the data transmission rate is 10 Gbps. And the remote capacity unit analyzes the received second digital signal and outputs the second digital signal through the covering antenna.
In the uplink, the capacity remote unit receives the signal of the coverage area, and transmits the signal back to the external network or the capacity convergence unit through the reverse process of the steps.
According to the method of the embodiment, the multi-service indoor coverage system can use multifunctional operation, the system can be flexibly applied according to different operations, and the requirements of different scenes on coverage services are met. And high-speed digital optical fiber transmission is adopted between the capacity convergence unit and the capacity distribution unit. The indoor distribution system can overcome the defects of the existing indoor distribution system, and can meet the requirements of the indoor coverage system when multiple services such as NB-IoT, 2G, 3G, 4G, WLAN and the like coexist in the future 5G era.
Fig. 12 schematically shows a flowchart of an operating method of a multi-service indoor coverage system according to another embodiment of the present invention, in this embodiment, a capacity aggregation unit is connected to a DU of a 5G system, and a capacity distribution unit is connected to a WLAN switch and a multimedia network switch, but the capacity distribution unit is not connected to the DU of the 5G system, that is, a 5G signal of the system of the embodiment of the present invention is from the DU of the 5G system directly connected to the capacity aggregation unit, as shown in fig. 12, in this embodiment, the operating method in downlink includes the following steps:
the implementation of steps S701 to S703 may refer to the implementation of steps S601 to S603.
Step S704: the capacity aggregation unit further receives signals from the DU of the 5G system, and on the basis of step S604, the capacity aggregation unit further performs packing and compression processing on the digital signals output by the DU of the 5G system and the parsed different types of digital baseband signals together to convert the digital signals into digital optical signals, and outputs the digital optical signals to the capacity distribution unit;
step S705: the capacity distribution unit further analyzes the received digital optical signal to obtain a second digital signal, receives the first transparent transmission digital signal from the WLAN switch, receives the second transparent transmission digital signal from the multimedia network switch, and packages and compresses the first digital signal, the second digital signal, the first transparent transmission digital signal, and the second transparent transmission digital signal together on the basis of step S605 to obtain a digital optical signal, and transmits the digital optical signal to the main capacity zoom-out unit. The digital optical signal obtained by the capacity distribution unit through packing and compression is a digital optical signal with a data rate of 40Gbps generated based on a CPRI protocol.
Step S706: the main capacity remote unit analyzes the received digital optical signal generated by the capacity distribution unit to obtain a service digital signal and a transparent transmission digital signal, wherein the obtained service digital signal comprises a first service digital signal matched with the frequency band of the main capacity remote unit and a second service digital signal matched with the frequency band of the capacity remote unit. Illustratively, the first digital signal comprises digital signals of 4G and 5G systems or signals of WLAN and 5G systems, and the second digital signal comprises digital signals of NB-IoT, 2G and 3G systems or digital signals of NB-IoT, 2G, 3G and 4G systems, respectively. The main capacity remote unit outputs the first digital signal through the covering antenna, outputs the second digital signal to the capacity remote unit, and outputs the transparent transmission digital signal to the multimedia switchboard. The main capacity remote unit outputs the second digital signal to the capacity remote unit through the Ethernet, and the data transmission rate is 10 Gbps.
Step S707: and the remote capacity unit analyzes the received second digital signal and outputs the second digital signal through the covering antenna.
In the uplink, the capacity remote unit receives the signal of the coverage area and transmits the signal back to the external network or the capacity aggregation unit or transmits the signal back to the WLAN switch or the multimedia switch connected with the capacity distribution unit through the reverse process of the above steps.
The method according to the embodiment can not only adapt to indoor coverage of various types of signals, overcome the defects of the existing indoor distribution system, and meet the requirements of the indoor coverage system when multiple services such as NB-IoT, 2G, 3G, 4G, WLAN and the like coexist in the future 5G era.
In addition, preferably, the system of the embodiment of the present invention may further set parameters through the monitoring module, so that the whole coverage system has a function of randomly calling the capacity according to the scene requirement, and meets the high capacity requirement of 5G. The specific implementation is described below by taking fig. 13 as an example: as shown in fig. 13, the different units all have corresponding channel designs and capacity carrying capacities, where the capacity carrying capacity represented by the capacity aggregation unit is the total capacity of 2G, 3G, 4G and 5G access of the system, the number of carriers in each mode is at most n, the first capacity distribution unit and the second capacity distribution unit represent two of all the capacity distribution units subordinate below the capacity aggregation unit 3, and each capacity distribution unit will bear the capacity in the capacity aggregation unit in whole or in part according to different practical application scenarios, and as shown in the example shown in fig. 13, the first capacity distribution unit and the second capacity distribution unit both bear only part of the capacity in the capacity aggregation unit. Similarly, all the master capacity remote units and the slave capacity remote units subordinate to each capacity distribution unit may fully or partially bear the capacity in the capacity distribution unit according to different practical application scenarios, and as shown in fig. 13, a first master capacity remote unit and a first slave capacity remote unit bear partial capacity of a second capacity distribution unit, and a pth master capacity remote unit and a pth slave capacity remote unit bear full capacity of the second capacity distribution unit. Therefore, based on the capacity distribution principle shown in fig. 13, the system according to the embodiment of the present invention may set the monitoring module connected to the capacity aggregation unit, and perform parameter setting according to the actual application scenario of the capacity remote unit (for example, the application scenario of the capacity remote unit with a larger traffic amount is different from the application scenario of the capacity remote unit with a smaller traffic amount, and the requirements are different) through the monitoring module, so that the system may allocate appropriate carrier numbers to different capacity distribution units and capacity remote units according to the set parameters, and adjust the capacity bearing conditions of different devices based on the allocated carrier numbers, so that the entire coverage system has a function of randomly calling the capacity according to the scenario requirements, and meets the high capacity requirement of 5G.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (11)
1. The multi-service indoor coverage system is characterized by comprising a capacity convergence unit, a capacity distribution unit and a capacity remote unit, wherein the capacity convergence unit is connected with the capacity distribution unit, and the capacity distribution unit is connected with the capacity remote unit; wherein the content of the first and second substances,
in the downlink, the number of channels in the downlink,
the capacity convergence unit is respectively connected with a radio frequency capacity access unit which converts the base station radio frequency signal coupled by the coupler into a digital transmission signal, a wireless capacity access unit which converts the received space wireless signal into the digital transmission signal, a baseband capacity access unit which converts the received 2G, 3G, 4G or NB-IoT signal into the digital transmission signal and a DU of a 5G system;
the capacity convergence unit analyzes digital transmission signals received from the radio frequency capacity access unit, the wireless capacity access unit and the baseband capacity access unit, packages and compresses analyzed digital baseband signals of different types and digital signals output from a DU (data channel) of a 5G system together to convert the digital baseband signals into digital optical signals, and outputs the digital optical signals to the capacity distribution unit;
the capacity distribution unit analyzes the digital optical signal output by the capacity convergence unit, decomposes the digital optical signal into a first digital signal and a second digital signal according to the signal bandwidth characteristics of the digital optical signal, and transmits the first digital signal and the second digital signal to the capacity remote unit;
the remote capacity unit comprises a main remote capacity unit and a remote capacity unit, wherein the main remote capacity unit outputs the first digital signal to the remote capacity unit in a covering mode and outputs the second digital signal to the remote capacity unit; the remote unit analyzes the received second digital signal and outputs a covering;
the master capacity remote unit and the slave capacity remote unit are configured to be respectively matched with the systems of the multiple access signals according to different capacity requirements of a coverage scene, and are used for realizing the coverage of the signals of different systems;
in the uplink, the capacity remote unit transmits a reverse signal back to the capacity aggregation unit through a reverse process of the downlink, and the capacity aggregation unit transmits the signal to a corresponding external network.
2. The system of claim 1, wherein the capacity distribution unit is further connected to a WLAN switch, and the capacity distribution unit is further configured to transmit the signal output by the capacity aggregation unit and the signal received from the WLAN switch to the capacity remote unit.
3. The system according to any of claims 1 to 2, wherein the main or/and remote volume unit comprises at least six channels.
4. The system of any one of claims 1-2, wherein the master and slave units use high speed ethernet for data transmission at a data transmission rate of 10Gbps, and the master unit powers the slave unit connected thereto over ethernet.
5. The system according to any one of claims 1 to 2, wherein the capacity distribution unit and the main remote capacity unit are in data transmission by high-speed digital optical fiber, the data transmission rate is not lower than 40Gbps, and the capacity distribution unit supplies power to the main remote capacity unit connected with the capacity distribution unit through a remote optical cable.
6. The system according to any one of claims 1 to 2, wherein the capacity aggregation unit star-connects a plurality of capacity distribution units.
7. Method for operating a multi-service indoor coverage system according to claim 1, wherein the capacity convergence unit is further connected to the DUs of the 5G system, and in the downlink, the method comprises
The radio frequency capacity access unit converts the base station radio frequency signal coupled by the coupler into a digital transmission signal and outputs the digital transmission signal to the capacity convergence unit;
the wireless capacity access unit converts the received space wireless signals into digital transmission signals and outputs the digital transmission signals to the capacity convergence unit;
the baseband capacity access unit converts the received 2G, 3G, 4G or NB-IoT signals into digital transmission signals and outputs the digital transmission signals to the capacity convergence unit;
the capacity convergence unit analyzes the received digital transmission signals of the radio frequency capacity access unit and the baseband capacity access unit of the wireless capacity access unit, packages and compresses the analyzed digital baseband signals of different types and the digital signals output from the DU of the 5G system together to convert the digital baseband signals into digital optical signals, and outputs the digital optical signals to the capacity distribution unit;
the capacity distribution unit analyzes the received digital optical signals to obtain first digital signals and second digital signals, and the first digital signals and the second digital signals are packed and compressed to obtain digital optical signals which are transmitted to the capacity remote unit;
the main capacity remote unit analyzes the received digital optical signal generated by the capacity distribution unit to obtain a first digital signal and a second digital signal, outputs the first digital signal through the covering antenna, and outputs the second digital signal to the capacity remote unit;
the received second digital signal is analyzed by the capacity remote unit and is output through the covering antenna;
in the uplink, the capacity remote unit receives the signal of the coverage area, and transmits the signal back to the external network or the capacity convergence unit through the reverse process of the steps.
8. The method of claim 7, wherein the capacity distribution unit is further connected to a WLAN switch and a multimedia network switch, and wherein in the downlink, the method further comprises
The capacity distribution unit also receives a first transparent transmission digital signal from the WLAN switch, receives a second transparent transmission digital signal from the multimedia network switch, and packages and compresses the first digital signal, the second digital signal, the first transparent transmission digital signal and the second transparent transmission digital signal together to obtain a digital optical signal which is transmitted to the main capacity remote unit;
the main capacity remote unit analyzes the received digital optical signal generated by the capacity distribution unit to obtain a first digital signal, a second digital signal and a transparent transmission digital signal, outputs the first digital signal through the covering antenna, outputs the second digital signal to the capacity remote unit, and outputs the transparent transmission digital signal to the multimedia switch;
the remote capacity unit analyzes the received second digital signal and outputs the second digital signal through a covering antenna;
in the uplink, the capacity remote unit receives the signal of the coverage area and transmits the signal back to the WLAN switch or the multimedia switch connected to the capacity distribution unit through the reverse process of the above steps.
9. The method of claim 8, wherein the first digital signal comprises digital signals of NB-IoT, 2G, and 3G systems, and the second digital signal comprises digital signals of 4G and 5G systems; or
The first digital signal includes digital signals of NB-IoT, 2G, 3G and 4G systems, and the second digital signal includes digital signals of WLAN and 5G systems.
10. The method according to claim 8 or 9, wherein the digital optical signal obtained by packing and compressing the capacity distribution unit is a digital optical signal with a data rate of 40Gbps generated based on the CPRI protocol.
11. The method of claim 10, wherein the master pull-out unit outputs the second digital signal to the pull-out unit over an ethernet at a data transmission rate of 10 Gbps.
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| CN111148183B (en) * | 2019-12-31 | 2021-11-02 | 京信网络系统股份有限公司 | Multi-system networking method, system, equipment and storage medium |
| CN111405580A (en) * | 2020-03-20 | 2020-07-10 | 广州开信通讯系统有限公司 | 5G indoor coverage system and working method |
| CN112672362B (en) * | 2020-12-29 | 2023-09-29 | 京信网络系统股份有限公司 | Data transmission method, device, base station and computer readable storage medium |
| CN113727361A (en) * | 2021-08-20 | 2021-11-30 | 深圳国人无线通信有限公司 | Mobile network indoor signal coverage system |
| CN113905390A (en) * | 2021-08-26 | 2022-01-07 | 日海恒联通信技术有限公司 | 5G wireless access type indoor distribution system |
| CN114039622B (en) * | 2021-11-06 | 2023-07-28 | 四川恒湾科技有限公司 | Method for realizing switching of synchronous surface between network ports on radio frequency unit |
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