CN113795003A - Multi-RRU (remote radio unit) extension system for 5G indoor wireless communication and implementation method - Google Patents
Multi-RRU (remote radio unit) extension system for 5G indoor wireless communication and implementation method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
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- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention discloses a 5G indoor wireless communication multi-RRU extension system, which comprises: the radio remote unit is used for receiving downlink data sent by the indoor baseband processing unit in a downlink, carrying out shunt processing on the downlink data and then sending the downlink data to the radio remote unit; or the uplink processing unit is used for receiving uplink data sent by the remote radio unit in an uplink, carrying out convergence processing on the uplink data and then sending the uplink data to the indoor baseband processing unit; the radio remote unit and the indoor baseband processing units are in a star-shaped and chain-shaped combined connection structure, and the radio remote unit is used for forming a plurality of cells by the star-shaped topological structure. The system disclosed by the invention can effectively increase the signal coverage of the cell and reduce the cell switching consumption generated when the user moves among different radio remote units.
Description
Technical Field
The invention relates to the technical field of 5G communication, in particular to a 5G indoor wireless communication multi-RRU extension system and an implementation method.
Background
With the advent of the 5G era, more than 70% of 5G applications in smart homes, smart manufacturing, remote offices, large business, etc. will mainly occur indoors, but the 5G higher band signals are difficult to reach indoors from outdoors. Therefore, wider and more stable requirements are put on the indoor 5G wireless network, and the indoor environment becomes an important 5G network value scene.
In order to meet the rigid requirements of a 5G network on large bandwidth, high capacity, low time delay and the like, when a 5G signal base station is built, in order to achieve larger bandwidth and higher frequency band, more antennas are adopted, more points are placed, and each point needs multiple antennas to realize 2T2R or 4T 4R. Then, aiming at 5G indoor distribution scenes, the problems of high construction cost, complex indoor deployment and the like exist in a novel digital indoor distribution system and the like. For example, nowadays, a cell is created for a radio remote unit RRU in an extended pico-station scenario, but due to the large number of RRUs, the equipment cost for creating a cell for each RRU is very high, and the requirements on the internal processing capabilities of the indoor baseband processing unit BBU and the RRU are high, which causes a problem of high transmission cost or transmission complexity.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a 5G indoor wireless communication multi-RRU extension system, which can effectively increase the signal coverage of a cell, reduce the cell switching consumption generated when a user moves between different radio remote units, reduce the baseband processing burden of an indoor baseband processing unit, and reduce the cost of the indoor baseband processing unit.
In order to solve the above technical problem, a first aspect of the present invention discloses a 5G indoor wireless communication multi-RRU extension system, which includes: the radio remote unit is used for receiving downlink data sent by the indoor baseband processing unit in a downlink, carrying out shunt processing on the downlink data and then sending the downlink data to the radio remote unit; or the uplink processing unit is used for receiving uplink data sent by the remote radio unit in an uplink, carrying out convergence processing on the uplink data and then sending the uplink data to the indoor baseband processing unit; the remote radio unit comprises a radio remote extension unit, a plurality of indoor baseband processing units and a plurality of radio remote units, wherein the radio remote extension unit and the radio remote units are in a star topology structure based on cable connection, the radio remote extension unit and the indoor baseband processing units are in a star and chain combined connection structure, and the radio remote extension unit is used for enabling the radio remote units to form a plurality of cells through the star topology structure.
In some embodiments, each remote radio unit is connected to at least 16 remote radio units, and each 4 or 8 remote radio units constitute a cell, which is at least a 100M 4T4R NR cell.
In some embodiments, the cell is a single frequency network cell of the same carrier frequency, and the remote radio unit is further configured to carry a plurality of single frequency network cells of different carrier frequencies.
In some embodiments, the
The uplink and downlink data comprise a Low Phy task of a radio remote unit, and the radio remote expansion unit performs convergence processing on the uplink data, wherein the convergence processing comprises the following steps: and processing the Low Phy task of the remote radio unit, and sending the processed Low Phy task to an indoor baseband processing unit based on an eCPRI protocol interface. The step of distributing and processing the downlink data by the radio remote unit includes: and processing the Low Phy task of the remote radio unit, and sending the processed Low Phy task to the remote radio unit based on an eCPRI/CPRI protocol interface.
In some embodiments, data transmission between the remote radio unit and the remote radio unit is performed by RJ45 ethernet or SFP28 fiber ethernet; the RJ45 Ethernet is used for providing short-distance data transmission, synchronous Ethernet clock and POE remote power supply for the communication based on eCPRI/CPRI protocol of the radio remote unit and the radio remote expansion unit; the SFP28 ethernet is configured to provide long-distance data transmission for the remote radio unit and the remote radio expansion unit based on the eccri/CPRI protocol communication.
In some embodiments, the remote radio unit further performs remote management on the remote radio unit through an automatic discovery and remote memory address access function of the eccri/CPRI protocol.
In some embodiments, the radio remote unit is further configured to obtain a synchronous clock from the indoor baseband processing unit through an IEEE 1588 protocol and an eccri protocol; the remote radio unit is used for acquiring the synchronous clock from the remote radio expansion unit through an IEEE 1588 protocol and an eCPRI/CPRI protocol.
In some embodiments, the system further includes a power supply module, and the radio remote unit is further configured to convert an alternating current 220V into a direct current 48V through the power supply module, and provide power over ethernet or power over optical/electrical composite cable of not less than 100W for the radio remote unit after performing reverse connection, overcurrent, short circuit, and EMC processing on the direct current 48V.
In some embodiments, the power module is further configured to generate a power failure monitoring result for monitoring AC power failure and DC power failure, and report the power failure monitoring result to the indoor baseband processing unit according to the power failure monitoring result.
According to a second aspect of the present invention, there is provided a method for implementing a 5G indoor wireless communication multi-RRU extension apparatus, where the method is applied to a 5G indoor wireless communication system, where the system includes a pico-station host, an indoor baseband processing unit and a radio remote unit, where the indoor baseband processing unit is in communication connection with the pico-station host, and the method includes: the configuration unit is used for receiving downlink data sent by the indoor baseband processing unit in a downlink, carrying out shunt processing on the downlink data and then sending the downlink data to the radio remote unit; or the radio remote extension unit is used for receiving uplink data sent by the radio remote unit in an uplink, carrying out convergence processing on the uplink data and then sending the uplink data to the indoor baseband processing unit; the remote radio unit comprises a radio remote extension unit, a plurality of indoor baseband processing units and a plurality of radio remote units, wherein the radio remote extension unit and the radio remote units are in a star topology structure based on cable connection, the radio remote extension unit and the indoor baseband processing units are in a star and chain combined connection structure, and the radio remote extension unit is used for enabling the radio remote units to form a plurality of cells through the star topology structure.
Compared with the prior art, the invention has the beneficial effects that:
the invention can effectively increase the signal coverage of the cell, reduce the cell switching consumption generated when the user moves between different RRUs, and realize that the Low Phy and eCPRI/CPRI protocol conversion functions are all placed in the radio frequency extension unit. Moreover, the baseband processing load of the RRU can be effectively reduced, the RRU cost is reduced, the construction cost of a novel digital room distribution system is reduced, the universality and the compatibility are high, and the system conforms to an eCPRI standard protocol. Therefore, investment can be saved, the existing network resources can be utilized to the maximum extent, and rapid deployment can be realized.
Drawings
Fig. 1 is a schematic diagram of a 5G indoor wireless communication multi-RRU extension system disclosed in an embodiment of the present invention;
fig. 2 is a schematic view of an application framework of a remote radio expansion unit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a specific implementation flow of an eccri protocol used by a radio frequency extension unit according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of an implementation of another 5G indoor wireless communication multi-RRU extension apparatus according to an embodiment of the present invention;
fig. 5 is a flowchart of an implementation method of a 5G indoor wireless communication multi-RRU extension apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an implementation apparatus of a 5G indoor wireless communication multi-RRU extension apparatus according to an embodiment of the present invention.
Detailed Description
For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the invention discloses a 5G indoor wireless communication multi-RRU (remote radio unit) extension system and an implementation method thereof, which can effectively increase the signal coverage of a cell, reduce the cell switching consumption generated when a user moves among different RRUs and realize that the functions of Low Phy and eCPRI/CPRI protocol conversion are all put in a radio frequency extension unit. Moreover, the baseband processing load of the RRU can be effectively reduced, the RRU cost is reduced, the construction cost of a novel digital room distribution system is reduced, the universality and the compatibility are high, and the system conforms to an eCPRI standard protocol. Therefore, investment can be saved, the existing network resources can be utilized to the maximum extent, and rapid deployment can be realized.
Example one
Referring to fig. 1, fig. 1 is a schematic diagram of a 5G indoor wireless communication multi-RRU extension system according to an embodiment of the present invention. The system can be implemented as a 5G indoor wireless communication system, and includes a pico-station host 1, a radio remote unit 3 (RRU), and a radio remote extension unit, and the specific application of the system is not limited in the embodiment of the present invention. As shown in fig. 1, the system may further include:
and a radio remote unit extension unit 4 (RHUB) configured to receive downlink data sent by the indoor baseband processing unit 2 in a downlink, perform shunt processing on the downlink data, and send the downlink data to the radio remote unit 3. Or used for receiving uplink data sent by the remote radio unit 3 in an uplink, and sending the uplink data to the indoor baseband processing unit 2 after the uplink data is subjected to convergence processing; the remote radio unit RHUB and the plurality of remote radio units are in a star topology structure based on cable connection, the remote radio unit 4 and the plurality of indoor baseband processing units 2 are in a star and chain combined connection structure, and the remote radio unit 4 is used for forming the plurality of remote radio units into a plurality of cells through the star topology structure. Illustratively, as shown in fig. 2, the application block diagram of a radio remote expansion unit is shown, specifically, the package type of the optical module that can set the cascade optical fiber communication interface of the indoor baseband processing unit 2 is SFP28, since SFP28 is an enhanced version of SFP +, and SFP + has the same size, but it can support the rate of 25Gb/s per single channel. Herein, the SFP28 may provide an efficient solution for upgrading a 10G-25G-100G network, and may meet the continuously increasing demand of a 5G indoor data center network, wherein the 2-path indoor baseband processing unit 2 and the 1-path cascaded optical interface may be connected to the remote radio expansion unit. In the indoor baseband processing unit 2, the optical ports and the cascade optical ports are set to meet Opt-7.2 compatibility Cat A, Cat B, eCPRI, thereby supporting 25Gbps/10Gbps optical port rate. It should be noted that the remote distance between the remote radio expansion unit and the remote radio unit supports at least 2km, that is, the communication distance of the optical module. In this way, every four remote radio units 3 or every 8 remote radio units can be combined into 1 cell, thereby effectively increasing the coverage area of the cell.
Further, in order to maximize the cell coverage function, for a cell connected with 8 remote radio units, the remote radio units may be powered through a POE RJ45 ethernet connector or an optical electrical composite cable, and a communication interface thereof may be RJ45 or SFP28, so that an eCPRI/CPRI protocol can be supported, so that an optical port can support a rate of not less than 13Gbps, so that each 4 remote radio units can support 1 100M 4T4R NR cell, so that 16 remote radio units can be connected by cascading one remote radio extension unit, that is, 4T4R cells can be supported, and the problems of BBU/RRU complexity and construction cost in the prior art are solved.
Further, the cells formed by the above implementation are single frequency network cells of the same carrier frequency, and thus, the remote radio unit is also used for bearing multiple single frequency network cells of different carrier frequencies. For the single frequency network SFN, a plurality of radio remote units under the radio remote expansion unit can form a single frequency network cell with the same carrier frequency, so that the cell switching consumption generated when a user moves among different radio remote units can be reduced. A single radio remote unit of the radio remote expansion unit can bear a plurality of single frequency network cells with different carrier frequencies. Therefore, a plurality of radio remote units under the plurality of radio remote expansion units can form a larger super single frequency network cell, thereby further increasing the indoor coverage area of the single cell. Therefore, by the distributed MIMO capability, smooth evolution from 5G low-order MIMO to 5G high-order MIMO deployment can be realized without replacing the remote radio unit hardware.
In some preferred embodiments, the uplink data may include a Low Phy task of the remote radio unit, and since the remote radio unit RHUB and the plurality of remote radio units are in a star topology structure based on cable connection, and the remote radio unit 4 and the plurality of indoor baseband processing units 2 are in a star and chain combined connection structure, the aggregation processing of the uplink data by the remote radio unit may include: and processing the Low Phy task of the remote radio unit, and sending the processed Low Phy task to the remote radio unit based on an eCPRI/CPRI protocol interface. The 2x100M Low Phy task based on the eCPRI protocol, which should be processed by the internal processing flow of the remote radio unit, is transferred to the remote radio expansion unit for processing, so that the baseband processing burden of the remote radio unit can be effectively reduced, the construction cost and the operation cost of the remote radio unit are reduced, and the remote radio unit is transmitted through an eCPRI/CPRI interface, so that the cost of a transmission link can be effectively reduced while the high transmission bandwidth is ensured.
Further, for data transmission between the remote radio unit and the remote radio unit by using RJ45 ethernet or SFP28 fiber optic ethernet, the RJ45 ethernet may provide short-distance data transmission, synchronous ethernet clock and POE remote power supply for the remote radio unit and the remote radio unit based on the eccri/CPRI protocol communication; the SFP28 optical fiber ethernet is used to provide long-distance data transmission for the communication based on the eccri/CPRI protocol of the remote radio unit and the remote radio expansion unit. The remote radio unit further implements remote management of the remote radio unit through the automatic discovery and remote memory address access functions of the eCPRI/CPRI protocol. Therefore, the radio remote expansion unit is in charge of receiving the management of the radio remote unit, and from the aspect of a management plane, the radio remote expansion unit not only completes the management of hardware resources of the radio remote expansion unit, but also completes the direct remote management of the hardware resources of the radio remote expansion unit through the automatic discovery and remote memory address access function in an eCPRI/CPRI protocol, reduces the dependence of the radio remote expansion unit on an embedded CPU, saves equipment cost and reduces the overall power consumption of a system.
Specifically, a specific implementation flow of the eccri protocol adopted by the radio frequency extension unit may be as shown in fig. 3, and a data rate estimation formula for the eccri protocol is as follows:
when compression exists:
FH_BW≈［（12×2×9+4）× Nbr_RBs ×Nbr_Spatial_layers］×［1 000 × 2µ × 14］× 1.20 × 1.15。
wherein when the SCS is 15kHz, mu = 0, and when the SCS is 30 kHz, mu = 1; 1.20 represents the consumption of control messages, interfaces and ethernet; 1.15 denotes ethernet transmission margin to avoid congestion and the like; the PRB compression algorithm is assumed to be block flowing point compression (9 bit/4 bit-expansion), and with normal cyclic prefix (14 symbols slot), the uplink and downlink control information are from DU to RU, so the uplink data rate is slightly reduced, for example, by 5%. Taking 1 cell of 100 MHz, 4T4R, IQ _9 as an example, the above formula is substituted:
rate = [ (12 × 2 × 9+ 4) × 273 × 4 ] × (1000 × 2 × 14) × 1.2 × 1.15=9.28 Gbit/s.
When no compression is carried out:
FH_BW ≈［（12×2×15）× Nbr_RBs ×Nbr_Spatial_layers］×［1000 × 2µ × 14］× 1.20 × 1.15。
wherein, when SCS is 15kHz, mu = 0, and when SCS is 30 kHz, mu = 1; 1.20 represents the consumption of control messages, interfaces and ethernet; 1.15 denotes ethernet transmission margin to avoid congestion and the like; using a non-compressed format, IQ _ 15; the uplink and downlink control information is from DU to RU, so the uplink data rate is slightly decreased, for example, by 5%. Taking 1 cell of 100 MHz, 4T4R, IQ _15 as an example, the above formula is substituted:
rate = [ (12 × 2 × 15) × 273 × 4 ] × (1000 × 2 × 14) × 1.2 × 1.15=15.2 Gbit/s.
Further, the radio remote unit is further configured to obtain the synchronous clock from the indoor baseband processing unit through an IEEE 1588 protocol and an eccri protocol, and the radio remote unit is configured to obtain the synchronous clock from the radio remote unit through the IEEE 1588 protocol and the eccri/CPRI protocol. Therefore, the link time synchronization error and the delay measurement error of the radio remote unit and the indoor baseband processing unit caused by device transmission and processing can be counteracted.
Example two
Referring to fig. 4, fig. 4 is a schematic diagram of another 5G indoor wireless communication multi-RRU extension system according to an embodiment of the present invention. The system can be implemented as a 5G indoor wireless communication system, and includes a pico-station host 1, an indoor baseband processing unit 2 (BBU) and a radio remote unit 3 (RRU) that are in communication connection with the pico-station host, and the embodiment of the present invention is not limited to the specific application of the system. As shown in fig. 4, the system may further include:
the power module 5 and the remote radio unit are further configured to convert an alternating current 220V into a direct current 48V through the power module, output the direct current 48V, and provide power over ethernet or power over optical/electrical composite cable of not less than 100W for the remote radio unit after performing reverse connection, overcurrent, short circuit and EMC processing on the direct current 48V. Specifically, the remote radio unit extension unit may also provide PoE ethernet or optical-electrical composite cable power for the remote radio unit. The AC-DC server power supply module can convert alternating current 220V into direct current 48V for output, and then the direct current 48V is subjected to protection circuit design such as reverse connection, overcurrent, short circuit, EMC and the like, so that power supply of not less than 100W is provided for the remote radio unit.
And the power supply module is also used for monitoring AC power failure and DC power failure to generate power failure monitoring results and reporting the power failure monitoring results to the indoor baseband processing unit. Due to the fact that 220V AC power supply is adopted, the AC-DC server power supply module has overvoltage/undervoltage protection and alarm functions, and can support the function of alarming to the indoor baseband processing unit when power failure occurs. The method is specifically realized by monitoring AC power failure and DC power failure through a voltage stabilizing diode matched with an optocoupler chip, increasing a farad capacitor in FPGA core power supply, and realizing the functions of rapidly saving data logs and reporting states to an indoor baseband processing unit after abnormal power failure through logic circuit processing.
Further, for the time synchronization mechanism of the FPGA, 257.8125MHz clock signals are recovered from 25Gbps rate optical interface data streams of the indoor baseband processing unit due to the external reference clock. The internal part can use the reference as a reference to lock and generate a synchronous clock to other modules, wherein the synchronous clock comprises a radio remote unit and a cascaded radio remote expansion unit. For a typical FPGA device, there may be 4 Serdes channels per group, each group preferably using a separate CLOCK. And the 1-path LVDS 257.8125MHz CLK is used for communicating a corresponding bank to the upper-connection BBU/cascade 25 Gbps-rate optical port module FPGA. The RRU is compatible with two rates, namely 25Gbps rate, and 2 paths of LVDS 257.8125MHz CLK are used for communicating a corresponding bank for the FPGA; the 10Gbps rate, 2-way LVDS 156.25MHz CLK communicates the corresponding bank to the FPGA.
EXAMPLE III
Referring to fig. 5, fig. 5 is a schematic flowchart illustrating a method for implementing a 5G indoor wireless communication multi-RRU extension apparatus according to an embodiment of the present invention. The method can be applied to a 5G indoor wireless communication system, which includes a pico-station host, an indoor baseband processing unit (BBU) in communication connection with the pico-station host, and a Radio Remote Unit (RRU), and the specific application of the method is not limited in the embodiment of the present invention. As shown in fig. 5, the method may include the steps of:
step 301: and configuring a radio remote extension unit which is used for receiving downlink data sent by the indoor baseband processing unit in a downlink, carrying out shunt processing on the downlink data and then sending the downlink data to the radio remote unit, or used for receiving uplink data sent by the radio remote unit in an uplink, carrying out aggregation processing on the uplink data and then sending the uplink data to the indoor baseband processing unit.
The radio remote unit and the indoor baseband processing units are in a star-shaped and chain-shaped combined connection structure, and the radio remote unit is used for forming a plurality of cells by the star-shaped topological structure.
Specifically, the package type of the cascade fiber optic communication interface of the indoor baseband processing unit 2 can be set as an optical module is SFP28, since SFP28 is an enhanced version of SFP +, and SFP + has the same size, but can support the speed of 25Gb/s of a single channel. Herein, the SFP28 may provide an efficient solution for upgrading a 10G-25G-100G network, and may meet the continuously increasing demand of a 5G indoor data center network, wherein the 2-path indoor baseband processing unit 2 and the 1-path cascaded optical interface may be connected to the remote radio expansion unit. In the indoor baseband processing unit 2, the optical ports and the cascade optical ports are set to meet Opt-7.2 compatibility Cat A, Cat B, eCPRI, thereby supporting 25Gbps/10Gbps optical port rate. It should be noted that the remote distance between the remote radio expansion unit and the remote radio unit supports at least 2km, that is, the communication distance of the optical module. In this way, every four remote radio units 3 or every 8 remote radio units can be combined into 1 cell, thereby effectively increasing the coverage area of the cell.
Further, in order to maximize the cell coverage function, for a cell connected with 8 remote radio units, the remote radio units may be powered through a POE RJ45 ethernet connector or a composite optical cable, and the length of the composite optical cable needs to comprehensively consider the cable cross-sectional area and loss factors, where the electrical resistivity and the length determine the cable cross-sectional area, ρ = RS/L, ρ is the electrical resistivity, S is the cross-sectional area, R is the resistance value, and L is the length of a wire. The communication interface can be RJ45 or SFP28, so that an eCPRI/CPRI protocol can be supported, the optical interface can support the speed of not less than 13Gbps, and each 4 remote radio units can support 1 100M 4T4R NR cell, so that 16 remote radio units can be connected by cascading one remote radio extension unit, that is, 4T4R cells can be supported, and the problems of BBU/RRU complexity and construction cost in the prior art are solved.
Further, the cells formed by the above implementation are single frequency network cells of the same carrier frequency, and thus, the remote radio unit is also used for bearing multiple single frequency network cells of different carrier frequencies. For the single frequency network SFN, a plurality of radio remote units under the radio remote expansion unit can form a single frequency network cell with the same carrier frequency, so that the cell switching consumption generated when a user moves among different radio remote units can be reduced. A single radio remote unit of the radio remote expansion unit can bear a plurality of single frequency network cells with different carrier frequencies. Therefore, a plurality of radio remote units under the plurality of radio remote expansion units can form a larger super single frequency network cell, thereby further increasing the indoor coverage area of the single cell. Therefore, by the distributed MIMO capability, smooth evolution from 5G low-order MIMO to 5G high-order MIMO deployment can be realized without replacing the remote radio unit hardware.
In some preferred embodiments, the uplink data may include a Low Phy task of the remote radio unit, and since the remote radio unit RHUB and the plurality of remote radio units are in a star topology structure based on cable connection, and the remote radio unit 4 and the plurality of indoor baseband processing units 2 are in a star and chain combined connection structure, the aggregation processing of the uplink data by the remote radio unit may include: and processing the Low Phy task of the remote radio unit, and sending the processed Low Phy task to the remote radio unit based on an eCPRI/CPRI protocol interface. The 2x100M Low Phy task based on eCPRI-CPRI protocol or eCPRI-eCPRI protocol, which should be processed by the internal processing flow of the remote radio unit, is transferred to the remote radio unit for processing, so that the baseband processing burden of the remote radio unit can be effectively reduced, the construction cost and the running cost of the remote radio unit are reduced, and the remote radio unit is transmitted through an eCPRI interface, so that the high transmission bandwidth is ensured, and the cost of a transmission link is effectively reduced.
Further, for data transmission between the remote radio unit and the remote radio unit by using RJ45 ethernet or SFP28 fiber optic ethernet, the RJ45 ethernet may provide short-distance data transmission, synchronous ethernet clock and POE remote power supply for the remote radio unit and the remote radio unit based on the eccri/CPRI protocol communication; the SFP28 optical fiber ethernet is used to provide long-distance data transmission for the communication based on the eccri/CPRI protocol of the remote radio unit and the remote radio expansion unit. The remote radio unit further implements remote management of the remote radio unit through the automatic discovery and remote memory address access functions of the eCPRI/CPRI protocol. Therefore, the radio remote expansion unit is in charge of receiving the management of the radio remote unit, and from the aspect of a management plane, the radio remote expansion unit not only completes the management of hardware resources of the radio remote expansion unit, but also completes the direct remote management of the hardware resources of the radio remote expansion unit through the automatic discovery and remote memory address access function in an eCPRI/CPRI protocol, reduces the dependence of the radio remote expansion unit on an embedded CPU, saves equipment cost and reduces the overall power consumption of a system.
Example four
Referring to fig. 6, fig. 6 is a schematic structural diagram of an implementation apparatus of a 5G indoor wireless communication multi-RRU extension apparatus according to an embodiment of the present invention. The apparatus for a 5G indoor wireless communication multi-RRU extension apparatus described in fig. 6 may be applied to a 5G indoor wireless communication system, and the embodiment of the present invention is not limited to the application system of the apparatus for a 5G indoor wireless communication multi-RRU extension apparatus. As shown in fig. 6, the apparatus may include:
a memory 601 in which executable program code is stored;
a processor 602 coupled to a memory 601;
the processor 602 invokes executable program code stored in the memory 601 for executing the 5G indoor wireless communication multi-RRU extension system described in the first embodiment.
EXAMPLE five
The embodiment of the invention discloses a computer-readable storage medium which stores a computer program for electronic data exchange, wherein the computer program enables a computer to execute the 5G indoor wireless communication multi-RRU extension system described in the first embodiment.
EXAMPLE six
An embodiment of the invention discloses a computer program product comprising a non-transitory computer readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute the 5G indoor wireless communication multi-RRU extension system described in embodiment one or embodiment two.
The above-described embodiments are only illustrative, and the modules described as separate components may or may not be physically separate, and the components displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above detailed description of the embodiments, those skilled in the art will clearly understand that the embodiments may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. Based on such understanding, the above technical solutions may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, where the storage medium includes a Read-Only Memory (ROM), a Random Access Memory (RAM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), a One-time Programmable Read-Only Memory (OTPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc-Read-Only Memory (CD-ROM), or other disk memories, CD-ROMs, or other magnetic disks, A tape memory, or any other medium readable by a computer that can be used to carry or store data.
Finally, it should be noted that: the 5G indoor wireless communication multi-RRU extension system and the implementation method thereof disclosed in the embodiments of the present invention are only disclosed as preferred embodiments of the present invention, and are only used for illustrating the technical solutions of the present invention, not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a many RRUs of 5G indoor wireless communication extend system which characterized in that, the system includes the indoor baseband processing unit and the remote radio unit of pico-station's station host computer communication connection, the system still includes:
the radio remote unit is used for receiving downlink data sent by the indoor baseband processing unit in a downlink, carrying out shunt processing on the downlink data and then sending the downlink data to the radio remote unit; or the uplink processing unit is used for receiving uplink data sent by the remote radio unit in an uplink, carrying out convergence processing on the uplink data and then sending the uplink data to the indoor baseband processing unit;
the remote radio unit comprises a radio remote extension unit, a plurality of indoor baseband processing units and a plurality of radio remote units, wherein the radio remote extension unit and the radio remote units are in a star topology structure based on cable connection, the radio remote extension unit and the indoor baseband processing units are in a star and chain combined connection structure, and the radio remote extension unit is used for enabling the radio remote units to form a plurality of cells through the star topology structure.
2. The 5G indoor wireless communication multi-RRU extension system of claim 1, wherein each RRU is connected with at least sixteen RRUs, and each four or eight RRUs are combined into a cell, and the cell is at least a 100M 4T4R NR cell.
3. The 5G indoor wireless communication multi-RRU extension system of claim 2, wherein the cell is a single frequency network cell of the same carrier frequency, and the RRU is further configured to carry single frequency network cells of a plurality of different carrier frequencies.
4. The 5G indoor wireless communication multi-RRU extension system of claim 3, wherein the uplink data and the downlink data both comprise a Low Phy task of a remote radio unit, and the aggregation processing of the uplink data by the remote radio unit comprises: processing the Low Phy task of the remote radio unit, and sending the processed Low Phy task to an indoor baseband processing unit based on an eCPRI protocol interface; the step of distributing and processing the downlink data by the radio remote unit includes: and processing the Low Phy task of the remote radio unit, and sending the processed Low Phy task to the remote radio unit based on an eCPRI/CPRI protocol interface.
5. The 5G indoor wireless communication multi-RRU extension system of claim 4, wherein the remote radio unit and the remote radio unit are in data transmission via RJ45 Ethernet or SFP28 fiber Ethernet;
the RJ45 Ethernet is used for providing short-distance data transmission, synchronous Ethernet clock and POE remote power supply for the communication based on eCPRI/CPRI protocol of the radio remote unit and the radio remote expansion unit;
the SFP28 ethernet is configured to provide long-distance data transmission for the remote radio unit and the remote radio expansion unit based on the eccri/CPRI protocol communication.
6. The 5G indoor wireless communication multi-RRU extension system of claim 5, wherein the RRU further implements remote management of the RRU through auto discovery and remote memory address access functions of the eCPRI/CPRI protocol.
7. The 5G indoor wireless communication multi-RRU extension system of claim 6, wherein the RRU extension unit is further configured to obtain a synchronization clock from the indoor baseband processing unit via an IEEE 1588 protocol and an eCPRI protocol;
the remote radio unit is used for acquiring the synchronous clock from the remote radio expansion unit through an IEEE 1588 protocol and an eCPRI/CPRI protocol.
8. The 5G indoor wireless communication multi-RRU extension system according to any one of claims 1-7, wherein the system further comprises a power supply module, and the RRU is further configured to convert an alternating 220V current into a direct 48V current through the power supply module, and provide no less than 100W of power over Ethernet or power over optical-electrical composite cable for the RRU after performing reverse connection, overcurrent, short circuit, and EMC processing on the direct 48V current.
9. The 5G indoor wireless communication multi-RRU extension system of claim 8, wherein the power module is further configured to generate a power failure monitoring result for monitoring AC power failure and DC power failure, and report the power failure monitoring result to the indoor baseband processing unit according to the power failure monitoring result.
10. A method for implementing a 5G indoor wireless communication multi-RRU extension device is characterized in that the method is applied to a 5G indoor wireless communication system, the system comprises a station host, an indoor baseband processing unit and a radio remote unit, the indoor baseband processing unit is in communication connection with the station host, and the method comprises the following steps:
the configuration unit is used for receiving downlink data sent by the indoor baseband processing unit in a downlink, carrying out shunt processing on the downlink data and then sending the downlink data to the radio remote unit; or the uplink processing unit is used for receiving uplink data sent by the remote radio unit in an uplink, carrying out convergence processing on the uplink data and then sending the uplink data to the indoor baseband processing unit;
the remote radio unit comprises a radio remote extension unit, a plurality of indoor baseband processing units and a plurality of radio remote units, wherein the radio remote extension unit and the radio remote units are in a star topology structure based on cable connection, the radio remote extension unit and the indoor baseband processing units are in a star and chain combined connection structure, and the radio remote extension unit is used for enabling the radio remote units to form a plurality of cells through the star topology structure.
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