CN218603576U - Remote unit protection system - Google Patents

Abstract

The utility model provides a distal end unit protection system relates to the communication technology field, when can solving the optical cable and break down, how to guarantee the not influenced technical problem of mobile communication signal's cover. The utility model discloses a: the first aggregation site is in chain connection with the m first far-end sites and the n second far-end sites through a first single-core optical fiber along the direction from the first aggregation site to the second aggregation site; the second aggregation site is connected with the n second far-end sites and the m first far-end sites in a chain manner through a second single-core optical fiber along the direction from the second aggregation site to the first aggregation site; each remote site in the m first remote sites and the n second remote sites is deployed with a PON protection device and a remote unit; the PON protection device is used for controlling the PON protection device to switch the interface of the single-core optical fiber when the received optical power is detected to be lower than the threshold value, so that the far-end unit corresponding to the PON protection device switches the aggregation station to carry out signal transmission.

Description

Remote unit protection system

Technical Field

The utility model relates to the field of communication technology, especially, relate to a distal end unit protection system.

Background

At present, in scenes such as high-speed rails, expressways, urban roads and the like, a processing unit pool of mobile communication generally adopts a chain optical cable optical fiber to connect a remote base station of mobile communication for mobile communication signal coverage.

However, since many remote base stations do not have the optical cable fiber with dual routes converged to the processing unit pool of the same site, when the optical cable fails, all the chain-connected mobile communication remote base stations behind the optical cable failed site are disconnected and disconnected, and the mobile communication operators not only lose business income, but also are seriously damaged by public praise of enterprises.

SUMMERY OF THE UTILITY MODEL

The utility model provides a distal end unit protection system when can solving the optical cable and breaking down, how to guarantee that mobile communication signal's cover is not influenced technical problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

in a first aspect, a remote unit protection system includes: a first aggregation site and a second aggregation site;

the first aggregation site is in chain connection with the m first far-end sites and the n second far-end sites through a first single-core optical fiber along the direction from the first aggregation site to the second aggregation site; the second aggregation site is in chain connection with the n second far-end sites and the m first far-end sites through a second single-core optical fiber in the direction from the second aggregation site to the first aggregation site; m first remote sites belong to a first aggregation site; the n second remote sites belong to a second aggregation site; m and n are positive integers;

each remote site in the m first remote sites and the n second remote sites is provided with a passive optical network PON protection device and a remote unit;

the PON protection device is used for controlling the PON protection device to switch the interface of the single-core optical fiber when the received optical power is detected to be lower than the threshold value, so that the far-end unit corresponding to the PON protection device switches the aggregation station to carry out signal transmission.

Optionally, the difference between m and n is less than or equal to 1;

a first type PON protection device is deployed on an adjacent first remote station and an adjacent second remote station; the adjacent first remote station is used for representing a first remote station adjacent to the first aggregation station in the m first remote stations; the adjacent second remote sites are used for representing second remote sites adjacent to the second aggregation site in the n second remote sites;

a second type PON protection device is deployed on a non-adjacent first remote station and a non-adjacent second remote station; the non-adjacent first remote sites are used for representing other first remote sites except the adjacent first remote sites in the m first remote sites; the adjacent second remote sites are used for representing other second remote sites except the adjacent second remote sites in the n second remote sites;

the first aggregation site includes: a first optical line terminal OLT; a first end of the first OLT is connected with a first type PON protection device deployed on an adjacent first remote station through a first single-core optical fiber; the first end of the first OLT is used for bidirectionally transmitting baseband signals with a first type PON protection device deployed on an adjacent first remote site;

the second aggregation site includes: a second OLT; a first end of the second OLT is connected with a first type PON protection device deployed on an adjacent second far-end station through a second single-core optical fiber; the first end of the second OLT is configured to transmit baseband signals in both directions with a first-type PON protection device deployed at an adjacent second remote site.

Optionally, the first aggregation site further includes: the system comprises a first base station protection controller, a first base station data memory and a first baseband processing unit pool;

the second end of the first OLT is connected with the first baseband processing unit pool; the second end of the first OLT is used for bidirectionally transmitting baseband signals with the first baseband processing unit pool;

the third end of the first OLT is connected with a first base station protection controller; the third end of the first OLT is used for sending interface switching information to the first base station protection controller; the interface switching information is used for indicating that the PON protection device switches the interface of the single-core optical fiber;

the first base station protection controller is connected with the first base station data memory; the first base station protection controller is used for sending activation information to the first base station data memory after receiving the interface switching information, so that the first base station data memory activates the service configuration parameters of the remote unit corresponding to the interface switching information, and controls the first baseband processing unit pool to transmit baseband signals to the remote unit corresponding to the interface switching information;

the second aggregation site further comprises: the second base station protection controller, a second base station data memory and a second baseband processing unit pool;

the second end of the second OLT is connected with the second baseband processing unit pool; the second end of the second OLT is used for bidirectionally transmitting baseband signals with the second baseband processing unit pool;

the third end of the second OLT is connected with a second base station protection controller; the third end of the second OLT is used for sending interface switching information to the second base station protection controller;

the second base station protection controller is connected with a second base station data memory; the second base station protection controller is configured to send activation information to the second base station data storage after receiving the interface switching information, so that the second base station data storage activates a service configuration parameter of a remote unit corresponding to the interface switching information, and controls the second baseband processing unit pool to transmit a baseband signal to the remote unit corresponding to the interface switching information.

Optionally, the first base station protection controller is specifically configured to:

controlling a first baseband processing unit pool to perform optical transmission on a baseband signal through a PON port of a first OLT;

when the optical transmission does not meet the preset capacity condition, controlling the first OLT to compress the baseband signal according to a preset proportion, and carrying out optical transmission on the compressed baseband signal through a PON port of the first OLT;

when the first baseband processing unit pool has idle baseband signals, controlling the first baseband processing unit pool to carry out optical transmission on the baseband signals based on the idle baseband signals;

and when the first baseband processing unit pool has no idle baseband signal, controlling the first baseband processing unit pool to perform optical transmission on the baseband signal based on the currently used baseband signal.

Optionally, the second base station protection controller is specifically configured to:

controlling the second baseband processing unit pool to perform optical transmission on the baseband signal through a PON port of a second OLT;

when the optical transmission does not meet the preset capacity condition, controlling the second OLT to compress the baseband signal according to a preset proportion, and performing optical transmission on the compressed baseband signal through a PON port of the second OLT;

when the second baseband processing unit pool has idle baseband signals, controlling the second baseband processing unit pool to carry out optical transmission on the baseband signals based on the idle baseband signals;

and when the second baseband processing unit pool does not have idle baseband signals, controlling the second baseband processing unit pool to carry out optical transmission on the baseband signals based on the currently used baseband signals.

Optionally, the first type PON protection device includes: port 1, port 1', port 2 and port 3;

when the first type PON protection device is deployed at a first remote station, port 1 is connected to a first single-core optical fiber in a direction toward a first aggregation station, and port 1' is connected to a first single-core optical fiber in a direction toward a second aggregation station; the port 2 is connected with the second single-core optical fiber along the direction towards the second aggregation station; or, when the first type PON protection device is deployed at a second remote station, the port 1 is connected to a second single-core optical fiber in a direction toward a second aggregation station, and the port 1' is connected to the second single-core optical fiber in a direction toward a first aggregation station; the port 2 is connected with the first single-core optical fiber along the direction towards the first aggregation station;

port 3 is connected to a remote unit; the remote unit is a remote unit in a remote station to which the first type PON protection device belongs;

the first type PON protection device includes: the device comprises an optical splitter X, an optical splitter Y, an optical power detector, an optical switch controller, a 1*2 optical switch and an optical network unit ONU; the optical splitter X and the optical splitter Y are passive devices;

the spectroscope X includes: port 1, port 1', and port 1"; the splitting ratio of the port 1 'is less than or equal to that of the port 1'; the port 1' is connected with an uplink port of the optical splitter Y;

the spectroscope Y includes: a first downlink port and a second downlink port; the splitting ratio of the first downlink port is larger than that of the second downlink port; the first downlink port is connected with a first output end of the 1*2 optical switch; the second downlink port is connected with the first end of the optical power detector;

the second end of the optical power detector is connected with the first end of the optical switch controller;

the second end of the optical switch controller is connected with the first input end of the 1*2 optical switch;

a second input end of the 1*2 optical switch is connected with a first end of the ONU;

the second output end of the 1*2 optical switch is port 2;

the second end of the ONU is port 3.

Optionally, the optical power detector is specifically configured to:

when the received optical power is detected to be lower than the threshold value, the optical switch controller controls 1*2 to switch off the first downlink port and switch on the port 2;

and when the received optical power is detected to be higher than or equal to the threshold value, controlling the 1*2 optical switch to switch on the first downlink port by the optical switch controller, and disconnecting the port 2.

Optionally, the second type PON protection device includes: port 1, port 1', port 2' and port 3;

when the second type PON protection device is deployed at a first remote station, port 1 is connected to a first single-core optical fiber in a direction toward a first aggregation station, and port 1' is connected to a first single-core optical fiber in a direction toward a second aggregation station; the port 2 is connected with a second single-core optical fiber along the direction towards the second aggregation station, and the port 2' is connected with the second single-core optical fiber along the direction towards the first aggregation station; or, when the second type PON protection device is deployed at a second remote station, the port 1 is connected to a second single-core optical fiber in a direction toward the second aggregation station, and the port 1' is connected to a second single-core optical fiber in a direction toward the first aggregation station; the port 2 is connected with the first single-core optical fiber along the direction towards the first aggregation site, and the port 2' is connected with the first single-core optical fiber along the direction towards the second aggregation site;

port 3 is connected to a remote unit; the remote unit is a remote unit in a remote station to which the second type PON protection device belongs;

the second type PON protection device includes: the optical power detection device comprises an optical splitter X, an optical splitter Y, an optical splitter Z, an optical power detector, an optical switch controller, a 1*2 optical switch and an optical network unit ONU; the optical splitter X, the optical splitter Y and the optical splitter Z are passive devices;

the spectroscope X includes: port 1, port 1', and port 1"; the splitting ratio of the port 1 'is less than or equal to that of the port 1'; the port 1' is connected with an uplink port of the optical splitter Y;

the spectroscope Y includes: a first downstream port and a second downstream port; the splitting ratio of the first downlink port is larger than that of the second downlink port; the first downlink port is connected with a first output end of the 1*2 optical switch; the second downlink port is connected with the first end of the optical power detector;

the second end of the optical power detector is connected with the first end of the optical switch controller;

the second end of the optical switch controller is connected with the first input end of the 1*2 optical switch;

a second input end of the 1*2 optical switch is connected with a first end of the ONU;

the second end of the ONU is a port 3;

the spectroscope Z includes: port 2, port 2' and port 0"; the splitting ratio of the port 0 'is less than or equal to the splitting ratio of the port 2'; port 0 "is connected to the second output of the 1*2 optical switch.

Optionally, the optical power detector is specifically configured to:

when the received optical power is detected to be lower than the threshold value, the optical switch controller controls 1*2 to switch off the first downlink port and switch on the port 0";

when the received optical power is detected to be higher than or equal to the threshold value, the optical switch controller controls the 1*2 optical switch to conduct the first downlink port and disconnect the port 0".

Optionally, a total optical attenuation from the PON port of the first OLT to the ONU optical port in the PON protection device of the target second remote site is smaller than a difference between a transmission power of the PON port laser of the first OLT and an optical power reception sensitivity of the ONU laser in the PON protection device of the target second remote site, and a total optical attenuation from the PON port of the first OLT to the ONU optical port in the PON protection device of the target second remote site is smaller than a difference between a transmission power of the ONU laser in the PON protection device of the target second remote site and an optical power reception sensitivity of the ONU laser of the first OLT; the target second remote site is a second remote site adjacent to the second aggregation site;

the total optical attenuation from the PON port of the second OLT to the ONU optical port in the PON protection device of the target first remote site is smaller than the difference of the transmitting power of the PON port laser of the second OLT minus the optical power receiving sensitivity of the ONU laser in the PON protection device of the target first remote site, the total optical attenuation from the PON port of the second OLT to the ONU optical port in the PON protection device of the target first remote site is smaller than the difference of the transmitting power of the ONU laser in the PON protection device of the target first remote site minus the optical power receiving sensitivity of the ONU laser of the second OLT; the target first remote site is a first remote site adjacent to the first aggregation site.

The application can bring the following beneficial effects:

therefore, when an optical cable fiber at a certain position has an interruption fault (that is, the optical power is lower than a threshold value), the position and the subsequent PON protection devices can connect the remote unit of the remote station in which the optical cable fiber is located upside down to the interface of another single-core fiber from the interface of the originally connected single-core fiber, and then perform signal transmission through the aggregation station corresponding to the another single-core fiber, thereby implementing protection switching of the mobile communication remote unit affected by the optical cable fiber fault, so that the coverage of the mobile communication signal is not affected.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a remote unit protection system provided by the present invention;

fig. 2 is a schematic structural diagram of a first type PON protection device provided by the present invention;

fig. 3 is a schematic structural diagram of a second type PON protection device provided by the present invention;

fig. 4 is a schematic structural diagram of another remote unit protection system provided by the present invention;

fig. 5 is a schematic structural diagram of another remote unit protection system provided by the present invention;

fig. 6 is a schematic structural diagram of another remote unit protection system provided by the present invention;

fig. 7 is a schematic structural diagram of another remote unit protection system provided by the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

At present, in scenes such as high-speed rails, expressways, urban roads and the like, a processing unit pool of mobile communication generally adopts a chain optical cable optical fiber to connect a remote base station of mobile communication for mobile communication signal coverage. Remote units for mobile communications largely use a distributed base station architecture, i.e., a networking form of processing unit pool + remote units.

For example, in fourth Generation Mobile Communication technology (4 g) and the following low-standard networks, a networking form of a Base Band Unit (BBU) pool + a Remote Radio Unit (RRU) is usually adopted.

In a high-system network such as a 5th Generation Mobile Communication technology (5 g), a networking form of a Distributed Unit (DU) pool of Mobile Communication base stations + an Active Antenna Unit (AAU) of a remote base station is generally adopted.

The RRU/AAU and the BBU/DU pool are usually connected by a bare optical cable and a star or chain of optical cables and optical fibers of a sparse Wavelength Division Multiplexer (CWDM).

However, for bidirectional convergence protection of expensive Dense Wavelength Division Multiplexing (DWDM) and Optical Transport Network (OTN) systems, protection requires a large number of double-route optical fiber cables to form a ring, and the ring can only be converged to a BBU/DU pool at the same site.

Because a plurality of remote base stations do not have optical cable optical fibers with double routes converged to a processing unit pool at the same site, when an optical cable fails, all chain-connected mobile communication remote base stations behind the optical cable failed site are disconnected and disconnected, and not only is business income lost, but also more importantly, public praise of enterprises is seriously damaged by mobile communication operators.

Based on the technical problem, the utility model provides a distal end unit protection system, include: a first aggregation site and a second aggregation site; the first aggregation site is connected with m first remote sites and n second remote sites in a chain manner through a first single-core optical fiber along the direction from the first aggregation site to the second aggregation site; the second aggregation site is connected with the n second far-end sites and the m first far-end sites in a chain manner through a second single-core optical fiber along the direction from the second aggregation site to the first aggregation site; m first remote sites belong to a first aggregation site; the n second remote sites belong to a second aggregation site; m and n are positive integers.

Each of the m first remote sites and the n second remote sites is deployed with a Passive Optical Network (PON) protection device and a remote unit, and the PON protection device is configured to control the PON protection device to switch an interface of a single-core fiber when detecting that received Optical power is lower than a threshold value, so that the remote unit corresponding to the PON protection device switches a convergence site to perform signal transmission.

Therefore, when an optical cable fiber at a certain position has an interruption fault (that is, the optical power is lower than a threshold value), the position and the subsequent PON protection devices can connect the remote unit of the remote station in which the optical cable fiber is located upside down to the interface of another single-core fiber from the interface of the originally connected single-core fiber, and then perform signal transmission through the aggregation station corresponding to the another single-core fiber, thereby implementing protection switching of the mobile communication remote unit affected by the optical cable fiber fault, so that the coverage of the mobile communication signal is not affected.

Fig. 1 shows a schematic structural diagram of a remote unit protection system according to an embodiment of the present application.

As shown in fig. 1, the remote unit protection system includes: a first aggregation site and a second aggregation site.

The first aggregation site is connected with the m first far-end sites and the n second far-end sites in a chain mode through the first single-core optical fiber along the direction from the first aggregation site to the second aggregation site. And the second aggregation site is in chain connection with the n second far-end sites and the m first far-end sites through a second single-core optical fiber along the direction from the second aggregation site to the first aggregation site. The m first remote sites belong to the first aggregation site. And the n second remote sites belong to the second aggregation site. m and n are positive integers.

Optionally, the first single-core optical fiber and the second single-core optical fiber belong to optical fiber cables. The optical cable fibers are arranged among the gathering stations in a chain mode to connect all the remote stations, wherein the first single-core optical fiber and the second single-core optical fiber respectively occupy one core.

Each of the m first remote sites and the n second remote sites is deployed with a PON protection device and a remote unit.

Optionally, the remote unit may be an RRU or an AAU.

The PON protection device is used for controlling the PON protection device to switch the interface of the single-core optical fiber when the received optical power is detected to be lower than the threshold value, so that the far-end unit corresponding to the PON protection device switches the aggregation station to carry out signal transmission.

Specifically, the PON protection device is installed between two aggregation sites through a chain-type optical cable fiber.

Optionally, the PON protection device includes: a first type of PON protection device (which may also be referred to as protection device type i) and a second type of PON protection device (which may also be referred to as protection device type ii).

The PON protection device is suitable for the PON passive optical network with any speed and any wavelength.

The PON protection device I type is used for being installed at a far-end station adjacent to the aggregation station, the PON protection device II type is installed at a far-end station between the two PON protection device I types, and a port 3 of the PON protection device (including the PON protection device I type and the PON protection device II type) of each far-end station is electrically connected with the RRU/AAU of the station through the CPRI/eCPRI. In one implementation, the difference between m and n is less than or equal to 1.

In particular, the lengths of the cable fibers between the remote sites and the aggregation site, and the remote sites, are substantially equal. During normal operation, in order to balance the loads of the aggregation sites, the numbers of the remote sites to which the aggregation sites are mainly attributed are close, and therefore, the difference between the number m of the remote sites to which the first aggregation site is mainly attributed and the number n of the remote sites to which the second aggregation site is mainly attributed is required to be 0 or 1.

It should be noted that each unit or information corresponding to the "active" aggregation site refers to each unit or information corresponding to the current aggregation site. Each unit or information corresponding to the "standby" aggregation site refers to each unit or information corresponding to another aggregation site.

For example, when the "active" aggregation site is a first aggregation site, each unit or information corresponding to the "active" aggregation site is each unit or information corresponding to the first aggregation site, for example: the base station comprises a first Optical Line Terminal (OLT), a first remote station, a first base station protection controller, a first base station data memory, a first single-core optical fiber, a first baseband processing unit pool and the like.

Each unit or information corresponding to the "standby" aggregation site is each unit or information corresponding to the second aggregation site, for example: the system comprises a second OLT, a second remote station, a second base station protection controller, a second base station data memory, a second single-core optical fiber, a second baseband processing unit pool and the like.

Correspondingly, when the "main" aggregation site is the second aggregation site, each unit or information corresponding to the "main" aggregation site is each unit or information corresponding to the second aggregation site, for example: the system comprises a second OLT, a second remote station, a second base station protection controller, a second base station data memory, a second single-core optical fiber, a second baseband processing unit pool and the like.

Each unit or information corresponding to the "standby" aggregation site is each unit or information corresponding to the first aggregation site, for example: the system comprises a first OLT, a first remote station, a first base station protection controller, a first base station data memory, a first single-core optical fiber, a first baseband processing unit pool and the like.

Fig. 1 shows m primary home directions of first remote sites, n primary home directions of second remote sites, n backup home directions of second remote sites, and m backup home directions of first remote sites.

A first type PON protection device is deployed on an adjacent first remote site and an adjacent second remote site. The adjacent first remote station is used for representing a first remote station adjacent to the first aggregation station in the m first remote stations. The adjacent second remote station is used for representing a second remote station adjacent to the second aggregation station in the n second remote stations.

A second type PON protection device is deployed on the non-adjacent first remote site and the non-adjacent second remote site. The non-adjacent first remote station is used to represent the other first remote stations except the adjacent first remote station in the m first remote stations. The adjacent second remote station is used to represent the other second remote stations except the adjacent second remote station in the n second remote stations.

The first aggregation site comprises: a first OLT. A first end of the first OLT is connected to a first type PON protection device deployed at an adjacent first remote site through a first single-core optical fiber. The first end of the first OLT is configured to bidirectionally transmit baseband signals with a first-type PON protection device deployed at an adjacent first remote site.

The second aggregation site comprises: and a second OLT. The first end of the second OLT is connected to a first-type PON protection device deployed at an adjacent second remote site through a second single-core fiber. The first end of the second OLT is configured to transmit baseband signals in both directions with a first-type PON protection device deployed at an adjacent second remote site.

Specifically, the first OLT and the second OLT may converge single-core optical fibers of optical cables in multiple directions. The first ends of the first OLT and the second OLT may be connected to the first type PON protection device of the remote station through the corresponding single-core optical fibers, so as to implement optical transmission of baseband signals.

Optionally, the optical transmission of the baseband signal may be performed through a Common Public Radio Interface (CPRI) or an enhanced Common Public Radio Interface (enhanced CPRI, eccri).

In one implementation, the first aggregation site further includes: the base station comprises a first base station protection controller, a first base station data memory and a first baseband processing unit pool.

And the second end of the first OLT is connected with the first baseband processing unit pool. The second end of the first OLT is configured to transmit baseband signals in two directions with the first baseband processing unit pool.

And the third end of the first OLT is connected with the first base station protection controller. And the third end of the first OLT is used for sending interface switching information to the first base station protection controller. The interface switching information is used for indicating that the PON protection device switches the interface of the single-core optical fiber.

The first base station protection controller is connected with the first base station data memory. The first base station protection controller is configured to send activation information to the first base station data storage after receiving the interface switching information, so that the first base station data storage activates a service configuration parameter of a remote unit corresponding to the interface switching information, and controls the first baseband processing unit pool to transmit a baseband signal to the remote unit corresponding to the interface switching information.

The second aggregation site further comprises: a second base station protection controller, a second base station data memory and a second baseband processing unit pool.

And the second end of the second OLT is connected with the second baseband processing unit pool. The second end of the second OLT is configured to transmit baseband signals in two directions with the second baseband processing unit pool.

And the third end of the second OLT is connected with the second base station protection controller. And the third end of the second OLT is used for sending interface switching information to the second base station protection controller.

The second base station protection controller is connected with the second base station data memory. The second base station protection controller is configured to send activation information to the second base station data storage after receiving the interface switching information, so that the second base station data storage activates a service configuration parameter of a remote unit corresponding to the interface switching information, and controls the second baseband processing unit pool to transmit a baseband signal to the remote unit corresponding to the interface switching information.

Optionally, the baseband processing unit pool may be a BBU or a DU.

The BBU pool is a 4G and below low-standard mobile communication baseband processing unit pool and comprises a CPRI electrical interface.

The DU pool is a distributed unit pool of a 5G high-standard mobile communication base station controller and comprises an eCPRI electrical interface.

Specifically, the second ends of the first OLT and the second OLT may be connected to the BBU/DU pool through corresponding single-core optical fibers, so as to implement electrical transmission of baseband signals.

Alternatively, the electrical transmission of the baseband signal may be through CPRI, or eccri.

The third ends of the first OLT and the second OLT can be logically connected with the base station protection controller through the corresponding single-core optical fibers, and are used for discovering a mobile communication RRU/AAU remote base station which is reversely connected to the standby single-core optical fiber (namely, the other single-core optical fiber) due to the fault of the optical fiber of the optical cable, and sending information to the base station protection controller.

The information sent to the base station protection controller may include a master Identity (ID) of an Optical Network Unit (ONU) and a slave ID of each electrical port of the ONU.

The main ID of the ONU indicates the remote station where the ONU is located. The slave ID identification of each electric port of the ONU indicates the condition of a baseband signal (CPRI/eCPRI) used by each RRU/AAU of a remote site where the ONU is located.

In an implementation manner, the first base station protection controller is specifically configured to:

and controlling the first baseband processing unit pool to perform optical transmission on the baseband signal through a PON port of the first OLT.

And when the optical transmission does not meet the preset capacity condition, controlling the first OLT to compress the baseband signal according to a preset proportion, and carrying out optical transmission on the compressed baseband signal through a PON port of the first OLT.

And when the first baseband processing unit pool has idle baseband signals, controlling the first baseband processing unit pool to carry out optical transmission on the baseband signals based on the idle baseband signals.

And when the first baseband processing unit pool has no idle baseband signal, controlling the first baseband processing unit pool to perform optical transmission on the baseband signal based on the currently used baseband signal.

In an implementation manner, the second base station protection controller is specifically configured to:

and controlling the second baseband processing unit pool to perform optical transmission on the baseband signal through the PON port of the second OLT.

And when the optical transmission does not meet the preset capacity condition, controlling the second OLT to compress the baseband signal according to a preset proportion, and performing optical transmission on the compressed baseband signal through a PON port of the second OLT.

And when the second baseband processing unit pool has idle baseband signals, controlling the second baseband processing unit pool to carry out optical transmission on the baseband signals based on the idle baseband signals.

And when the second baseband processing unit pool does not have idle baseband signals, controlling the second baseband processing unit pool to carry out optical transmission on the baseband signals based on the currently used baseband signals.

Specifically, after receiving information of the reverse mobile communication RRU/AAU remote base station sent by the OLT corresponding to the base station protection controller (i.e., switching an interface of the single-core fiber so that the remote unit corresponding to the PON protection device switches the aggregation site to perform signal transmission), the base station protection controller may activate a service configuration parameter corresponding to the reverse mobile communication RRU/AAU remote base station in a base station data memory, and simultaneously control the BBU/DU pool to provide a required baseband signal (CPRI/eccri) to the reverse mobile communication RRU/AAU remote base station, and perform optical transmission in the optical fiber cable through the PON port of the OLT.

When the capacity of optical transmission is not enough, the base station protection controller may control the OLT to enable a z:1 compression mode (z is a positive integer greater than or equal to 2, such as 2:1) for the baseband signal (CPRI/eccri).

When the BBU/DU pool has enough idle baseband signals, the required baseband signals occupy the idle baseband signals.

When the BBU/DU pool has insufficient idle baseband signals, the base station protection controller shares the required baseband signals with the existing baseband signals by controlling the electrical interface of the OLT.

And the base station data memory stores all service configuration parameters of the standby attributive mobile communication RRU/AAU remote base station.

When the system works normally, all service configuration parameters of the main attributive mobile communication RRU/AAU remote base station are activated.

When an optical fiber fault occurs, the base station protection controller activates the service configuration parameters of the corresponding standby attributive mobile communication RRU/AAU remote base station.

And after the optical fiber fault is repaired, freezing the service configuration parameters of the corresponding standby attributive mobile communication RRU/AAU remote base station.

The mainly-used mobile communication RRU/AAU remote base station is a remote unit corresponding to a convergence station to which a data storage of the current base station belongs.

Correspondingly, the standby mobile communication RRU/AAU remote base station refers to a remote unit corresponding to another aggregation site.

For example, when the base station data storage is the base station data storage of the first aggregation site, the active home RRU/AAU remote base station is the remote unit of the first remote site. And the standby attributive mobile communication RRU/AAU remote base station is a remote unit of the second remote station.

And when the base station data memory is the base station data memory of the second aggregation site, the main home mobile communication RRU/AAU remote base station is a remote unit of the second remote site. And the standby attributive mobile communication RRU/AAU remote base station is a remote unit of the first remote station.

In one implementation, as shown in fig. 2, the first type PON protection device includes: port 1, port 1', port 2 and port 3.

When the first type PON protection device is deployed at a first remote station, port 1 is connected to a first single-core optical fiber in a direction toward a first aggregation station, and port 1' is connected to a first single-core optical fiber in a direction toward a second aggregation station. Port 2 is connected to a second single core fiber in a direction towards the second aggregation site. Or, when the first type PON protection device is deployed at a second remote station, the port 1 is connected to a second single-core optical fiber in a direction toward the second aggregation station, and the port 1' is connected to the second single-core optical fiber in a direction toward the first aggregation station. The port 2 is connected to the first single-core fiber in a direction towards the first aggregation site.

Port 3 is connected to a remote unit. The remote unit is a remote unit in a remote station to which the first type PON protection device belongs.

The first type PON protection device includes: the optical power detection device comprises an optical splitter X, an optical splitter Y, an optical power detector, an optical switch controller, a 1*2 optical switch and an ONU. The beam splitter X and the beam splitter Y are passive devices.

Specifically, when the mobile communication RRU/AAU remote base station of a certain remote station is powered off, since the optical splitter X in the PON protection device is a passive device, the optical transmission of the subsequent mobile communication RRU/AAU remote base station is not affected, that is, the subsequent mobile communication RRU/AAU remote base station can still work normally.

The spectroscope X includes: port 1, port 1' and port 1".

The splitting ratio of port 1 "is equal to or less than the splitting ratio of port 1'. Port 1 "is connected to the upstream port of splitter Y.

The spectroscope Y includes: a first downstream port and a second downstream port.

The splitting ratio of the first downstream port is greater than the splitting ratio of the second downstream port. The first downstream port is connected to a first output terminal of the 1*2 optical switch. The second downlink port is connected with the first end of the optical power detector.

The second end of the optical power detection meter is connected with the first end of the optical switch controller.

The second end of the optical switch controller is connected with the first input end of the 1*2 optical switch.

A second input of the 1*2 optical switch (i.e., port 0 in fig. 2) is connected to a first end of the ONU.

The second output of the 1*2 optical switch is port 2.

The second end of the ONU is port 3.

Optionally, in the first downlink port and the second downlink port of the optical splitter Y, one splitting ratio may be 95% to 97%, that is, the downlink port with a high splitting ratio, and the other splitting ratio may be 3% to 5%, that is, the downlink port with a low splitting ratio.

The downstream port with a high splitting ratio may be optically connected to a first input of the 1*2 optical switch, and the other downstream port with a low splitting ratio may be optically connected to an optical power detector.

One end of the optical power detector is optically connected with a port with a lower splitting ratio (3% -5%) of the optical splitter Y, and the other end of the optical power detector is logically connected with the optical switch controller.

One end of the optical switch control module is connected with the optical power detector in a logic way, and the other end of the optical switch control module is connected with the 1*2 optical switch in a logic way.

5363 one end of optical switch 1*2 is logically connected to optical switch control module, port 0 is optically connected to local site optical network unit ONU, port 0' is optically connected to a port with higher y-splitting ratio (95% -97%) of optical splitter, and port 0 ″ (i.e., port 2 of PON protection device) is connected to spare optical cable single-core fiber.

In one possible implementation, the optical power detector is specifically configured to:

when the received optical power is detected to be lower than the threshold value, the optical switch controller controls 1*2 to turn off the first downlink port (port 0' in fig. 2) and turn on port 2.

When the received optical power is detected to be higher than or equal to the threshold value, the optical switch controller controls the 1*2 optical switch to conduct the first downlink port and disconnect the port 2.

Specifically, during normal operation, port 0 of the 1*2 optical switch is optically connected to port 0'.

When the optical fiber of the main optical cable fails, the optical power received by the optical power detector is smaller than the threshold value, and the optical switch controller controls the optical connection of the port 0 of the optical switch to the port 0".

After the optical cable fiber failure recovery, the optical power received by the optical power detector is greater than the threshold value, and the port 0 of the optical switch is controlled to be optically connected to the port 0'.

In an implementation manner, the total optical attenuation of the ONU optical ports in the PON protection device from the PON port of the first OLT to the target second remote site is smaller than a difference obtained by subtracting the optical power receiving sensitivity of the ONU laser in the PON protection device of the target second remote site from the PON port laser transmission power of the first OLT, and the total optical attenuation of the ONU optical ports in the PON protection device from the PON port of the first OLT to the target second remote site is smaller than a difference obtained by subtracting the optical power receiving sensitivity of the PON port laser of the first OLT from the ONU laser transmission power in the PON protection device of the target second remote site. The target second remote site is a second remote site adjacent to the second rendezvous site.

Specifically, the total optical attenuation from the PON port of the OLT to the optical port of the optical network unit ONU in the last remote-site PON protection device to be protected needs to be smaller than the difference between the transmission power of the PON port laser of the OLT at the aggregation site minus the optical power reception sensitivity of the optical network unit ONU in the last remote-site PON protection device to be protected, and smaller than the difference between the transmission power of the optical network unit ONU laser in the last remote-site PON protection device to be protected minus the optical power reception sensitivity of the PON port laser of the OLT at the aggregation site.

When the capacity of optical transmission cannot meet the requirement of a remote station, the base station protection controller controls the OLT to start a z:1 compression mode on baseband signals (CPRI/eCPRI), and a passive optical network PON with higher speed can be used, or a plurality of pairs of color optical channels are opened in a single-core optical fiber of an optical cable, or the number of the single-core optical fibers occupying the optical cable is increased to be provided for the OLT to be used by a newly added PON port and an ONU.

In one implementation, as shown in fig. 3, the second type PON protection device includes: port 1, port 1', port 2' and port 3.

When the second type PON protection device is deployed at a first remote site, the port 1 is connected to a first single-core optical fiber in a direction toward a first aggregation site, and the port 1' is connected to a first single-core optical fiber in a direction toward a second aggregation site. Port 2 is connected to a second single core optical fiber in a direction towards the second aggregation site, and port 2' is connected to a second single core optical fiber in a direction towards the first aggregation site. Or, when the second type PON protection device is deployed at a second remote station, port 1 is connected to a second single-core optical fiber in a direction toward the second aggregation station, and port 1' is connected to a second single-core optical fiber in a direction toward the first aggregation station. Port 2 is connected to a first single core optical fibre in a direction towards the first aggregation site and port 2' is connected to a first single core optical fibre in a direction towards the second aggregation site.

Port 3 is connected to a remote unit. The remote unit is a remote unit in a remote station to which the second type PON protection device belongs.

The second type PON protection device includes: the device comprises an optical splitter X, an optical splitter Y, an optical splitter Z, an optical power detector, an optical switch controller, a 1*2 optical switch and an optical network unit ONU. The beam splitter X, the beam splitter Y and the beam splitter Z are passive devices.

Specifically, when the mobile communication RRU/AAU remote base station of a certain remote station is powered off, since the optical splitter X and the optical splitter Z in the PON protection device are passive devices, optical transmission of the subsequent mobile communication RRU/AAU remote base station is not affected, that is, the subsequent mobile communication RRU/AAU remote base station can still work normally.

The spectroscope X includes: port 1, port 1' and port 1". The splitting ratio of port 1 "is equal to or less than the splitting ratio of port 1'. Port 1 "is connected to the upstream port of splitter Y.

The spectroscope Y includes: a first downstream port and a second downstream port. The splitting ratio of the first downstream port is greater than the splitting ratio of the second downstream port. The first downstream port is connected to a first output terminal of the 1*2 optical switch. The second downlink port is connected with the first end of the optical power detector.

The second end of the optical power detection meter is connected with the first end of the optical switch controller.

The second end of the optical switch controller is connected with the first input end of the 1*2 optical switch.

A second input terminal of the 1*2 optical switch is connected to the first terminal of the ONU.

The second end of the ONU is port 3.

The spectroscope Z includes: port 2, port 2' and port 0". The splitting ratio of port 0 "is equal to or less than the splitting ratio of port 2'. Port 0 "is connected to the second output of the 1*2 optical switch.

Specifically, the second type PON protection device adds an optical splitter Z compared with the first type PON protection device, and the other structures are the same as those of the first type PON protection device.

And a port 2 of the added optical splitter Z is an uplink port and is connected with a spare optical cable single-core optical fiber.

The splitting ratio of the downstream port 0 ″ of the optical splitter Z is less than or equal to the splitting ratio of the other downstream port 2'.

In one possible implementation, the optical power detector is specifically configured to:

when the received optical power is detected to be lower than the threshold value, the optical switch controller controls 1*2 to switch off the first downlink port and switch on port 0".

And when the received optical power is detected to be higher than or equal to the threshold value, controlling the 1*2 optical switch to switch on the first downlink port and disconnecting the port 0' by the optical switch controller.

The total optical attenuation from the PON port of the second OLT to the ONU optical port in the PON protection device of the target first remote site is smaller than the difference between the transmission power of the PON port laser of the second OLT and the optical power reception sensitivity of the ONU laser in the PON protection device of the target first remote site, and the total optical attenuation from the PON port of the second OLT to the ONU optical port in the PON protection device of the target first remote site is smaller than the difference between the transmission power of the ONU laser in the PON protection device of the target first remote site and the optical power reception sensitivity of the ONU laser of the second OLT. The target first remote site is a first remote site adjacent to the first aggregation site.

Specifically, the total optical attenuation from the PON port of the OLT to the optical port of the optical network unit ONU in the last remote-site PON protection device to be protected needs to be smaller than the difference between the transmission power of the PON port laser of the OLT at the aggregation site minus the optical power reception sensitivity of the optical network unit ONU in the last remote-site PON protection device to be protected, and smaller than the difference between the transmission power of the optical network unit ONU laser in the last remote-site PON protection device to be protected minus the optical power reception sensitivity of the PON port laser of the OLT at the aggregation site.

When the capacity of optical transmission cannot meet the requirement of a remote station, besides the mode that the base station protection controller controls the OLT to start z:1 compression on a baseband signal (CPRI/eCPRI), the base station protection controller can also use a passive optical network PON with higher speed, or open a plurality of pairs of color optical channels in an optical cable single-core optical fiber, or increase the number of the single-core optical fibers occupying the optical cable to provide the OLT with newly added PON ports and ONUs for use.

In an implementation manner, as shown in fig. 4, when m + n is greater than or equal to 4, it is preset that the first aggregation site is an a aggregation site and the second aggregation site is a B aggregation site. The m first remote sites include: a1 remote site, a2 remote site, a3 remote site. The n first remote sites include: b1 remote site. The main single-core optical fiber (also called a single fiber) is a first single-core optical fiber, and the spare single-core optical fiber (also called b single fiber) is a second single-core optical fiber.

Fig. 4 shows the primary home direction of a1 remote site, a2 remote site, a3 remote site up to am remote site, the primary home direction of b1 remote site up to bn remote site, the backup home direction of b1 remote site up to bn remote site, and the backup home direction of a1 remote site, a2 remote site, a3 remote site up to am.

In this case, a1 a port 1' of a type i PON protection device (i.e., a first type PON protection device) of the PON protection device at the remote site is optically connected to a port 1 of a type ii PON protection device (i.e., a second type PON protection device) of the PON protection device at the remote site through an optical cable a number primary single-core fiber; a1, a protection device I type port 2 of a far-end station is optically connected with a PON protection device II type port 2' of a far-end station a2 through a spare single-core optical fiber of an optical cable b number; and a port 1 'of the PON protection device II type of the a2 far-end station is optically connected with a port 1 of the PON protection device II of the a3 far-end station through an optical cable a number main single-core optical fiber, and a port 2 of the PON protection device II type of the a2 far-end station is optically connected with a port 2' of the PON protection device II type of the a3 far-end station through an optical cable b number standby single-core optical fiber until the am far-end station.

The connection mode of the b1 to bn far-end stations is the same as that of the a1 to am far-end stations, but the optical cable main single-core optical fiber is number b, and the optical cable standby single-core optical fiber is number a. The port 1 'of the PON protection device II type of the am far-end station is optically connected with the port 2 of the PON protection device II of the bn far-end station through the optical cable a single-core optical fiber, and the port 2 of the PON protection device II type of the am far-end station is optically connected with the port 1' of the PON protection device II of the bn far-end station through the optical cable b single-core optical fiber.

In an implementation manner, with reference to fig. 4, as shown in fig. 5, when m + n is equal to 3, one of a1 remote sites is mainly attributed to an aggregation site a, and one protection device type i is used, and the other two (B1, B2) remote sites are mainly attributed to an aggregation site B, and one protection device type i and one protection device type ii are used; the port 1 'and the port 2 of the protection device I type of the a1 far-end station are respectively optically connected to the port 2 and the port 1' of the protection device II type of the b2 far-end station through optical cables a and b single-core optical fibers.

Fig. 5 shows the primary home direction of the a1 remote site, the primary home direction of the b1 remote site, the b2 remote site, the b1 remote site, the backup home direction of the b2 remote site, and the backup home direction of the a1 remote site.

In an implementation manner, referring to fig. 5, as shown in fig. 6, when m + n is equal to 2, that is, m = n =1, one of the remote sites mainly belongs to one aggregation site, and the other remote site mainly belongs to the other aggregation site, only two protection devices i are used, one protection device i is a type port 1', and the port 2 is optically connected to the other protection device i is a type port 2 and the port 1' through optical cables a and b.

Fig. 6 shows the primary home direction of a1 remote site, the primary home direction of b1 remote site, the backup home direction of b1 remote site, and the backup home direction of a1 remote site.

Fig. 7 is a schematic view illustrating an application scenario of the remote unit protection system according to an embodiment of the present application.

As shown in fig. 7, a 4G mobile communication coverage scenario such as a high-speed rail or an expressway is preset, in which 10GPON devices (the uplink and downlink bandwidth rates are both 10 Gbps) are adopted for optical cable fiber chain, and two aggregation sites a and B are provided, and 6 pairs of CPRI electrical interfaces (1 pair for transmitting and receiving) are provided in a BBU pool in each aggregation site and connected to the OLT.

When the system works normally, 4 pairs of CPRIs work, and 2 pairs of CPRIs are idle; among the four remote sites, a1 remote site, a2 remote site are mainly a home A sink site and a standby home B sink node, and B1 remote site, B2 remote site are mainly a home B sink site and a standby home A sink node; each 4G remote base station comprises 2 RRUs, each RRU occupies 1 pair of CPRI, double sectors are covered back to back along a high-speed rail or a highway, and each sector is single carrier frequency.

Fig. 7 shows the primary home direction of a1 remote site, the primary home direction of a2 remote site, the primary home direction of b1 remote site, the b2 remote site, the backup home direction of b1 remote site, b2 remote site, and the backup home direction of a1 remote site and a2 remote site.

Table 1 shows the radio carrier frequency width, antenna condition, baseband type, and bandwidth condition of the forward baseband of the RRU at the remote base station of 4G-FDD/LTE mobile communication.

TABLE 1

Table 2 shows the bandwidth occupied by two RRUs at each remote station on 10GPON optical transmission.

TABLE 2

As shown in fig. 7, the a1 remote station and the b1 remote station use a PON protection device type i, and the a2 remote station and the b2 remote station use a PON protection device type ii.

The port 1 of the PON protection device I type of the a1 far-end station is optically connected with the OLT of the A gathering station through the optical cable a number primary single-core optical fiber, the port 1 'is optically connected with the port 1 of the PON protection device II of the a2 far-end station through the optical cable a number primary single-core optical fiber, and the port 2 is optically connected with the port 2' of the PON protection device II type of the a2 far-end station through the optical cable b number standby single-core optical fiber.

The port 1 'of the PON protection device ii type at the a2 remote station is optically connected to the port 2 of the PON protection device ii at the b2 remote station through an optical cable a-number single-core optical fiber, and the port 2 of the PON protection device ii type at the a2 remote station is optically connected to the port 1' of the PON protection device ii at the b2 remote station through an optical cable b-number single-core optical fiber.

The connection mode from the b1 far-end station to the b2 far-end station is the same as that from the a1 far-end station to the a2 far-end station, but the optical cable main single-core optical fiber is number b, and the optical cable standby single-core optical fiber is number a.

The total optical attenuation from the PON port of the OLT to the last remote site to be protected (from the aggregation site to the B1 remote site, and from the aggregation site to the a1 remote site) in the PON protection device needs to be smaller than the difference between the transmission power of the PON port laser of the OLT and the optical power reception sensitivity of the optical network unit ONU in the PON protection device of the last remote site to be protected, and smaller than the difference between the transmission power of the optical network unit ONU laser in the PON protection device of the last remote site to be protected and the optical power reception sensitivity of the PON port laser of the OLT.

When the optical cable fiber between the a1 remote station and the a2 remote station fails, the optical power received by the optical power detector in the PON protection device type ii of the a2 remote station is lower than a threshold value, and the optical switch controller controls the optical switch to be connected from the original port 0 '(main optical cable single-core fiber) to the reverse port 0' (standby optical cable single-core fiber), so that two RRUs of the a2 remote station belong to the standby home B convergence station.

After the fault of the optical cable optical fiber is repaired, if the optical power received by the optical power detector in the PON protection device II type of the a2 remote station is larger than a threshold value, the optical switch is controlled by the optical switch controller to be connected to the port 0 '(spare optical cable single-core optical fiber) in a reversed mode and connected back to the port 0' (main optical cable single-core optical fiber), and the a2 remote station returns to the main A aggregation station.

And when the optical fiber of the optical cable fails, the OLT optical line terminal of the B aggregation site finds that the two RRUs of the a2 remote site are in standby reverse connection according to the main ID identification of the ONU and the slave ID identifications of the electric ports of the ONU, and sends information to the base station protection controller of the B aggregation site.

And after receiving the information of the reverse mobile communication RRU remote base station sent by the OLT, the base station protection controller activates service configuration parameters corresponding to the reverse mobile communication RRU remote base station in a base station data memory.

The service configuration parameters at least include an IP address, antenna parameters, a master ID Identifier of the ONU, slave ID identifiers of each electrical port of the ONU, cell ID (base station ID), sectorID (sector ID), physical Cell Identifier (PCI), frequency point, radius (coverage Radius), TAC (tracking area Identifier), TAL (Identifier of location area), uplink/downlink bandwidth, and the like.

The base station protection controller can control the BBU pool to provide 2 pairs of idle baseband signals (CPRI), optical transmission is carried out in an optical cable fiber through a PON port of the OLT to an a2 remote station, the optical transmission is provided for two RRU remote base stations which are reversely connected in mobile communication, and normal work of the a2 remote station is guaranteed.

And after the optical fiber fault of the optical cable is repaired, freezing the service configuration parameters of the mobile communication RRU remote base station of the corresponding standby attributive a2 remote station at the B convergence station.

When the optical cable fiber between the a1 far-end station and the A aggregation station breaks down, the optical power received by the optical power detector in the type I of the PON protection device of the a1 far-end station is lower than a threshold value, the optical switch is controlled by the optical switch controller to be connected to the port 0 '(the primary optical cable single-core fiber) in an original mode and inversely connected to the port 0' (the standby optical cable single-core fiber) in an inverted mode, meanwhile, the optical power received by the optical power detector in the type II of the PON protection device of the a2 far-end station is lower than the threshold value, and the optical switch is controlled by the optical switch controller to be connected to the port 0 '(the primary optical cable single-core fiber) in an original mode and inversely connected to the port 0' (the standby optical cable single-core fiber). Therefore, two RRUs of the a1 remote station and the a2 remote station belong to the standby home B aggregation station.

After the optical cable fiber fault is repaired, if the optical power received by the optical power detectors in the PON protection devices of the a1 remote station and the a2 remote station is greater than a threshold value, the optical switch is controlled by the optical switch controller to be connected to the port 0 '(spare optical cable single-core fiber), to be inversely connected to the port 0' (main optical cable single-core fiber), and the a1 remote station and the a2 remote station return to the main a aggregation station.

And the OLT of the B aggregation site finds that the two RRUs of the a1 remote site and the a2 remote site are respectively subjected to standby reverse connection according to the main ID identification of the ONU and the slave ID identification of each electric port of the ONU, and sends the information to the base station protection controller of the B aggregation site.

And after receiving the information of the reverse mobile communication RRU remote base station sent by the OLT, the base station protection controller activates service configuration parameters corresponding to the reverse mobile communication RRU remote base station in a base station data memory.

The service configuration parameters at least include an IP address, antenna parameters, a master ID identifier of the ONU, slave ID identifiers of each electrical port of the ONU, a Cell ID, a SectorID, a PCI, a frequency point, a Radius, a TAC, a TAL, an uplink/downlink bandwidth, and the like.

The base station protection controller can control the BBU pool to provide 2 pairs of idle baseband signals (CPRI), and the base station protection controller shares the required baseband signals with the existing baseband signals by controlling the electrical interface of the OLT, that is, two RRUs of an a1 remote station share 1 pair of CPRI, and two RRUs of an a2 remote station share another 1 pair of CPRI, and perform optical transmission to the a1 remote station and an a2 remote station in an optical fiber cable through the PON port of the OLT, and provide the optical transmission for the use of two mobile communication RRU remote stations which are respectively inversely connected with the a1 remote station and the a2 remote station, thereby ensuring the normal operation of the a1 remote station and the a2 remote station.

After the optical fiber cable fault is repaired, service configuration parameters of mobile communication RRU remote base stations of corresponding standby attributive a1 remote station and a2 remote station are frozen at the B convergence station.

When the optical cable fiber faults occur in the B2 remote station and the B1 remote station, and in the B1 remote station and the B aggregation station, the working modes of protection are the same, and are not described again.

When the capacity of the optical transmission 10GPON still cannot meet the use of the remote station by the above method, for example, if there are large capacity requirements of RRUs/AAUs of a plurality of remote stations, a passive optical network PON with a higher rate (for example, 25GPON, 50GPON, 100GPON, etc.) may be adopted, or a WDM-PON mode is adopted in which a plurality of pairs of color optical channels are opened in a single-core optical fiber of an optical cable, or the number of single-core optical fibers occupying the optical cable is increased to provide the OLT with a newly added PON port and ONU for use.

Optionally, when the mobile communication RRU/AAU remote base station of the a1 remote station is powered off, because the optical splitter X in the PON protection device is a passive device, optical transmission of the mobile communication RRU/AAU remote base station of the subsequent a2 remote station is not affected, that is, the mobile communication RRU/AAU remote base station of the subsequent a2 remote station can still work normally.

Similarly, when the mobile communication RRU/AAU remote base station of the b1 remote station is powered off, the normal operation of the subsequent mobile communication RRU/AAU remote base station of the b2 remote station is not affected.

From the above, the PON protection device and system of the RRU/AAU remote base station unit provided in the present application are applicable to BBU/DU pool convergence stations for mobile communication at both ends, and can respectively utilize different single-core optical fibers in an optical cable to chain-connect respective mobile communication RRU/AAU remote base stations to which they belong, and perform optical transmission of baseband signals (CPRI/eccri) in a PON manner.

All service configuration parameters of the mobile communication RRU/AAU remote base station with main attribution and standby attribution are stored in a base station data memory of a BBU/DU pool convergence site for mobile communication. And when the system normally works, the BBU/DU pool aggregation site for mobile communication is responsible for communication with the main home mobile communication RRU/AAU remote base station.

When an optical cable fiber at a certain position has an interruption fault, the remote base station of the mobile communication RRU/AAU at the remote station is originally connected to the main single-core optical fiber by the protection device of the PON at the certain position and the subsequent PON protection device, the OLT of the BBU/DU pool convergence station for standby direction mobile communication can find out which remote base station or remote base stations of the mobile communication RRU/AAU have the inverse connection, and the base station protection controller activates the data of the corresponding inverse-connected remote base station needing to be protected in the base station data memory, so that the BBU and the DU pool start the CPRI/eCPPRI of the corresponding inverse-connected remote base station, thereby realizing the protection switching of the remote base station of the mobile communication RRU/AAU influenced by the optical cable fiber fault and enabling the coverage of the mobile communication signal not to be influenced.

In addition, when the mobile communication RRU/AAU remote base station of a certain remote site is powered off, since the optical splitter X in the first type PON protection device, and the optical splitter X and the optical splitter Z in the second type PON protection device are passive devices, the optical transmission of the subsequent mobile communication RRU/AAU remote base station is not affected, that is, the subsequent mobile communication RRU/AAU remote base station can still work normally.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The processes or functions according to the embodiments of the present application are generated in whole or in part when the computer-executable instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer-readable storage media can be any available media that can be accessed by a computer or can comprise one or more data storage devices, such as servers, data centers, and the like, that can be integrated with the media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), among others.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present disclosure, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical function division, and there may be other division ways in actual implementation. For example, various elements or components may be combined or may be integrated into another device, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. Units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed to a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. The integrated unit, if implemented as a software functional unit and sold or used as a separate product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present invention may be substantially implemented as a software product, or all or part of the technical solutions may be implemented in a storage medium, and the software product includes several instructions to make a device (which may be a single chip, a chip, etc.) or a processor (processor) execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. A remote unit protection system, comprising: a first aggregation site and a second aggregation site;

the first aggregation site is in chain connection with m first remote sites and n second remote sites through a first single-core optical fiber in the direction from the first aggregation site to the second aggregation site; the second aggregation site is connected with the n second remote sites and the m first remote sites in a chain manner through a second single-core optical fiber along the direction from the second aggregation site to the first aggregation site; the m first remote sites belong to the first aggregation site; the n second remote sites belong to the second aggregation site; m and n are positive integers;

each of the m first remote sites and the n second remote sites is deployed with a Passive Optical Network (PON) protection device and a remote unit;

the PON protection device is used for controlling the PON protection device to switch an interface of a single-core optical fiber when detecting that the received optical power is lower than a threshold value, so that a far-end unit corresponding to the PON protection device switches a convergence station to transmit signals.

2. The remote unit protection system of claim 1, wherein the difference between m and n is less than or equal to 1;

a first type PON protection device is deployed on an adjacent first remote station and an adjacent second remote station; the adjacent first remote station is used for representing a first remote station adjacent to the first aggregation station in the m first remote stations; the adjacent second remote station is configured to indicate a second remote station, which is adjacent to the second aggregation station, in the n second remote stations;

a second type PON protection device is deployed on a non-adjacent first remote station and a non-adjacent second remote station; the non-adjacent first remote sites are used for representing other first remote sites except the adjacent first remote sites in the m first remote sites; the adjacent second remote station is used for representing other second remote stations except the adjacent second remote station in the n second remote stations;

the first aggregation site comprises: a first optical line terminal OLT; a first end of the first OLT is connected with a first type PON protection device deployed on the adjacent first remote station through the first single-core optical fiber; a first end of the first OLT is configured to bidirectionally transmit baseband signals with a first-type PON protection device deployed on the adjacent first remote site;

the second aggregation site comprises: a second OLT; a first end of the second OLT is connected to a first type PON protection device deployed on the adjacent second remote station through the second single-core optical fiber; the first end of the second OLT is configured to bidirectionally transmit baseband signals with the first-type PON protection device deployed at the adjacent second remote site.

3. The remote unit protection system of claim 2,

the first aggregation site further comprising: the system comprises a first base station protection controller, a first base station data memory and a first baseband processing unit pool;

the second end of the first OLT is connected with the first baseband processing unit pool; a second end of the first OLT is configured to bidirectionally transmit baseband signals with the first baseband processing unit pool;

the third end of the first OLT is connected with the first base station protection controller; the third end of the first OLT is configured to send interface switching information to the first base station protection controller; the interface switching information is used for indicating that the PON protection device switches the interface of the single-core optical fiber;

the first base station protection controller is connected with the first base station data memory; the first base station protection controller is configured to send activation information to the first base station data storage after receiving the interface switching information, so that the first base station data storage activates a service configuration parameter of a remote unit corresponding to the interface switching information, and controls the first baseband processing unit pool to transmit a baseband signal to the remote unit corresponding to the interface switching information;

the second aggregation site further comprises: the second base station protection controller, a second base station data memory and a second baseband processing unit pool;

a second end of the second OLT is connected to the second baseband processing unit pool; a second end of the second OLT is configured to bidirectionally transmit baseband signals with the second baseband processing unit pool;

the third end of the second OLT is connected with the second base station protection controller; the third end of the second OLT is configured to send interface switching information to the second base station protection controller;

the second base station protection controller is connected with the second base station data memory; the second base station protection controller is configured to send activation information to the second base station data storage after receiving the interface switching information, so that the second base station data storage activates a service configuration parameter of a remote unit corresponding to the interface switching information, and controls the second baseband processing unit pool to transmit a baseband signal to the remote unit corresponding to the interface switching information.

4. The remote unit protection system as claimed in claim 2, wherein said first type PON protection device comprises: port 1, port 1', port 2 and port 3;

when the first type PON protection device is deployed at the first remote station, the port 1 is connected to the first single-core optical fiber in a direction toward the first aggregation station, and the port 1' is connected to the first single-core optical fiber in a direction toward the second aggregation station; the port 2 is connected with the second single-core optical fiber along the direction towards the second aggregation station; or, when the first type PON protection device is deployed at the second remote station, the port 1 is connected to the second single-core optical fiber in a direction toward the second aggregation station, and the port 1' is connected to the second single-core optical fiber in a direction toward the first aggregation station; the port 2 is connected with the first single-core optical fiber along the direction towards the first aggregation station;

the port 3 is connected with a remote unit; the remote unit is a remote unit in a remote site to which the first type PON protection device belongs;

the first type PON protection device comprises: the optical power detection device comprises an optical splitter X, an optical splitter Y, an optical power detector, an optical switch controller, a 1*2 optical switch and an optical network unit ONU; the optical splitter X and the optical splitter Y are passive devices;

the optical splitter X includes: the port 1, the port 1' and port 1"; the splitting ratio of the port 1 'is less than or equal to the splitting ratio of the port 1'; the port 1' is connected with an uplink port of the optical splitter Y;

the spectroscope Y includes: a first downstream port and a second downstream port; the splitting ratio of the first downlink port is greater than the splitting ratio of the second downlink port; the first downlink port is connected with a first output end of the 1*2 optical switch; the second downlink port is connected with the first end of the optical power detector;

the second end of the optical power detection meter is connected with the first end of the optical switch controller;

the second end of the optical switch controller is connected with the first input end of the 1*2 optical switch;

a second input end of the 1*2 optical switch is connected with a first end of the ONU;

a second output end of the 1*2 optical switch is the port 2;

the second end of the ONU is the port 3.

5. The remote unit protection system of claim 4, wherein the optical power detector is specifically configured to:

when the received optical power is detected to be lower than the threshold value, the optical switch controller controls the 1*2 optical switch to disconnect the first downlink port and conduct the port 2;

and when the received optical power is detected to be higher than or equal to the threshold value, controlling the 1*2 optical switch to switch on the first downlink port and switch off the port 2 by the optical switch controller.

6. The remote unit protection system of claim 2, wherein the second type PON protection device comprises: port 1, port 1', port 2' and port 3;

when the second type PON protection device is deployed at the first remote station, the port 1 is connected to the first single-core optical fiber in a direction toward the first aggregation station, and the port 1' is connected to the first single-core optical fiber in a direction toward the second aggregation station; the port 2 is connected with the second single-core optical fiber along the direction towards the second aggregation station, and the port 2' is connected with the second single-core optical fiber along the direction towards the first aggregation station; or, when the second type PON protection device is deployed at the second remote station, the port 1 is connected to the second single-core optical fiber in a direction toward the second aggregation station, and the port 1' is connected to the second single-core optical fiber in a direction toward the first aggregation station; the port 2 is connected with the first single-core optical fiber in a direction towards the first aggregation station, and the port 2' is connected with the first single-core optical fiber in a direction towards the second aggregation station;

the port 3 is connected with a remote unit; the remote unit is a remote unit in a remote site to which the second type PON protection device belongs;

the second type PON protection device comprises: the optical power detection device comprises an optical splitter X, an optical splitter Y, an optical splitter Z, an optical power detector, an optical switch controller, a 1*2 optical switch and an optical network unit ONU; the optical splitter X, the optical splitter Y and the optical splitter Z are passive devices;

the optical splitter X includes: the port 1, the port 1' and port 1"; the splitting ratio of the port 1 'is less than or equal to the splitting ratio of the port 1'; the port 1' is connected with an uplink port of the optical splitter Y;

the spectroscope Y includes: a first downlink port and a second downlink port; the splitting ratio of the first downlink port is greater than that of the second downlink port; the first downlink port is connected with a first output end of the 1*2 optical switch; the second downlink port is connected with the first end of the optical power detector;

the second end of the optical power detection meter is connected with the first end of the optical switch controller;

the second end of the optical switch controller is connected with the first input end of the 1*2 optical switch;

a second input end of the 1*2 optical switch is connected with a first end of the ONU;

the second end of the ONU is the port 3;

the optical splitter Z includes: the port 2, the port 2' and port 0"; the splitting ratio of the port 0 'is less than or equal to the splitting ratio of the port 2'; the port 0 ″ is connected to the second output terminal of the 1*2 optical switch.

7. The remote unit protection system of claim 6, wherein the optical power detector is specifically configured to:

when the received optical power is detected to be lower than the threshold value, the optical switch controller controls the 1*2 optical switch to disconnect the first downlink port and to connect the port 0";

and when the received optical power is detected to be higher than or equal to the threshold value, controlling the 1*2 optical switch to switch on the first downlink port and switch off the port 0' through the optical switch controller.

8. The remote unit protection system of claim 4 or 6,

a total optical attenuation from the PON port of the first OLT to an ONU optical port in the PON protection device of the target second remote site is smaller than a difference between a transmission power of a PON port laser of the first OLT and an optical power receiving sensitivity of an ONU laser in the PON protection device of the target second remote site, and a total optical attenuation from the PON port of the first OLT to an ONU optical port in the PON protection device of the target second remote site is smaller than a difference between a transmission power of an ONU laser in the PON protection device of the target second remote site and an optical power receiving sensitivity of a PON port laser of the first OLT; the target second remote site is a second remote site adjacent to the second aggregation site;

a total optical attenuation from the PON port of the second OLT to an ONU optical port in the PON protection device of the target first remote site is smaller than a difference between a transmission power of a PON port laser of the second OLT and a reception sensitivity of an optical power of an ONU laser in the PON protection device of the target first remote site, and a total optical attenuation from the PON port of the second OLT to the ONU optical port in the PON protection device of the target first remote site is smaller than a difference between a transmission power of an ONU laser in the PON protection device of the target first remote site and a reception sensitivity of an optical power of a PON port laser of the second OLT; the target first remote site is a first remote site adjacent to the first rendezvous site.

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