WO2019001442A1

WO2019001442A1 - Point-to-multipoint fibre transmission method and related device

Info

Publication number: WO2019001442A1
Application number: PCT/CN2018/092975
Authority: WO
Inventors: 孙晓; 齐江; 王自强
Original assignee: 华为技术有限公司
Priority date: 2017-06-30
Filing date: 2018-06-27
Publication date: 2019-01-03
Also published as: CN107493137A

Abstract

Disclosed are a point-to-multipoint fibre transmission method and a related device. The transmissions between various REs and an REC are independent from one another; fibres are saved by using a tree-shaped fibre link; and the REC supports connection to a larger amount of REs. The method of the present application comprises: a radio control equipment (REC) configuring an identifier for a target radio equipment (RE); and the REC respectively sending at least two downlink signals to at least two REs, wherein a target downlink signal of the at least two downlink signals carries the identifier, so that the target RE of the at least two REs receives the target downlink signal according to the identifier, the REC and the at least two REs forming a tree-shaped fibre link.

Description

Point-to-multipoint optical fiber transmission method and related equipment

This application claims the priority of the Chinese Patent Application filed on June 30, 2017, the Chinese Patent Office, Application No. 201710526844.3, and the application entitled "A point-to-multipoint optical fiber transmission method and related equipment", the entire contents of which are incorporated by reference. Combined in this application.

Technical field

The present application relates to the field of communications technologies, and in particular, to a point-to-multipoint optical fiber transmission method and related equipment.

Background technique

At present, distributed base stations have become the mainstream form of base station equipment. Since 2016, major operators have begun to accelerate the pace of encryption station deployment. In the scenario where the remote radio unit (RRU) is extended, the baseband unit (BBU) and the RRU will form a front-end (Fronthaul) network through fiber-optic connections. The pre-transmission network supports long distances of more than 10 kilometers. Optical fiber transmission. In addition, as the Cloud Radio Access Network (CloudRAN) is commercially available, the BBU will also form a pre-transmission network between the BBU and the RRU. Currently, the optical fiber transmission interface standards between the various standard wireless networks BBU and RRU are mainly the Common Public Radio Interface (CPRI) standard, and other standards similar to the CPRI standard exist. However, most operators lack fiber resources from BBU to RRU, which greatly restricts the deployment rhythm of encryption stations and CloudRAN.

According to the CPRI standard, multiple network topologies are supported between REC and RE over long distance transmission. For details, refer to Figure 1. Figure 1 includes three network topologies: point-to-point link, link link, and ring link. .

However, the above network topology has the following disadvantages: in the link chain, if the RE fails, all the downstream RE services are interrupted; the link and the ring link require more fibers, especially the ring link. The fiber is doubled; the number of stages that the REC can cascade is affected by the clock skew, and the number of REs that can be cascaded is limited.

Summary of the invention

The present application provides a point-to-multipoint optical fiber transmission method and related equipment. The transmission between each RE and the REC is independent of each other. The tree-shaped optical fiber link saves the optical fiber, and the REC supports more RE numbers.

In view of this, the first aspect of the present application provides a point-to-multipoint optical fiber transmission method, which may include: an REC and at least two REs form a tree-shaped optical fiber link, and the REC configures an identity (ID) for each RE, For example, the target identifier is configured for the target RE, and each RE is separately notified of the identifier assigned to it, so that each RE acquires its own identifier. Then, the REC sends at least two downlink signals to the at least two REs, where the at least two downlink signals include a target downlink signal, and the target downlink signal carries a target identifier. After receiving the at least two downlink signals, the target REs in the at least two REs determine a target downlink signal from the target identifiers in the at least two downlink signals, so that the target RE receives the target downlink signal that belongs to itself. It can be seen that the transmission between each RE and REC is independent of each other. The tree-shaped fiber link saves the fiber, and the REC supports the connection of more REs.

In some possible implementation manners, the foregoing RECs respectively send the at least two downlink signals to the at least two REs, where the REC sends the at least two downlink signals to the at least two REs by using the optical passive beam splitter. It can be seen that an implementation of a tree-shaped fiber link is provided. The tree-shaped fiber link is more in line with the actual RE physical network topology, and the fiber is saved compared to the chain link and the ring link, especially the backbone fiber. .

In other possible implementation manners, the method further includes: in the point-to-multipoint optical fiber transmission mechanism, the REC needs to separately configure an uplink time slot for the at least two REs, so that each RE determines an uplink signal according to the uplink time slot configured for the RE. The moment of sending. It can be seen that the transmission timing of the uplink signal of the RE needs to be accurately controlled by the REC to avoid collision of uplink transmission between multiple REs, so that different REs need to insert the time slot required by the REC before transmitting the uplink signal.

In other possible implementation manners, the method further includes: the REC needs to sample the uplink signal by using a local clock to complete synchronization of the clocks of the REs with the local clock. It can be seen that, in order to ensure that the clocks of the REs are synchronized with the local clock, for example, the clock synchronization is completed within the uplink burst overhead time, the REC needs to resample the uplink signal of the RE through the REC local clock.

In other possible implementation manners, the method may further include: when the REC detects that there is a RE open station, re-ranging the RE that has the open station; or, when detecting the presence of the RE fault, performing the faulty RE. Re-ranging. It can be seen that only when the RE starts or fails, the distance measurement needs to be performed. If the ranging mechanism needs to be faulty or the network management triggers, the ranging window is opened, and the impact of the ranging on the normal RE service is reduced, and when the faulty RE is re-ranging, Since the original ranging information is stored, the ranging window can be shortened without affecting the operation of other REs.

In other possible implementation manners, the downlink signal includes a superframe, and the frame structure of the superframe includes an identifier field and a physical layer control information field.

The second aspect of the present application further provides a point-to-multipoint optical fiber transmission method, which may include:

The REC and the at least two REs form a tree-shaped fiber link, and any one of the at least two REs determines a transmission time of the uplink signal according to the acquired uplink time slot, and the frame structure of the uplink signal includes an identifier field and a physical layer The overhead field is sent; the RE sends an uplink signal to the REC according to the sending time of the uplink signal. It can be seen that after determining the sending time of the uplink signal, the RE sends the uplink signal according to the sending time to avoid collision or collision of the uplink signal during the transmission.

In some possible implementation manners, the physical layer control information field is also included in the frame structure of the uplink signal.

The third aspect of the present application provides an REC, where the REC and the at least two REs form a tree-shaped fiber link, and the REC can implement the functions of the method provided by the foregoing first aspect or any optional implementation of the first aspect. The function can be implemented by software, and the software includes modules corresponding to the above functions, and each module is used to perform corresponding functions.

The fourth aspect of the present application provides an RE, where at least two REs and RECs form a tree-shaped fiber link, and the RE can implement the functions of the method provided by the foregoing second aspect or any alternative implementation of the second aspect, This function can be implemented by software, and the software includes modules corresponding to the above functions, and each module is used to perform corresponding functions.

A fifth aspect of the present application provides a computer storage medium for storing computer software instructions for use in the REC described above, including a program designed to perform the functions implemented by the RECs in the various aspects described above.

A sixth aspect of the present application provides a computer storage medium for storing computer software instructions for use in the RE described above, including a program designed to perform the functions implemented by the REs in the various aspects described above.

As can be seen from the foregoing technical solutions, the embodiment of the present invention has the following advantages: the REC is the target RE configuration identifier; the REC sends at least two downlink signals to the at least two REs, and the target downlink signal in the at least two downlink signals carries the identifier. Therefore, the target RE in the at least two REs receives the target downlink signal according to the identifier, and the REC and the at least two REs form a tree-shaped fiber link. Therefore, the transmission between each RE and REC is independent of each other. The tree-shaped fiber link saves the fiber, and the REC supports the connection of more REs.

DRAWINGS

FIG. 1 is a schematic diagram of a network topology between three existing RECs and REs;

2 is a schematic diagram of an existing PON network architecture;

3 is a flowchart of a point-to-multipoint optical fiber transmission method provided by the present application;

4 is a schematic diagram of a REC provided by the present application connected to at least two REs through a passive optical power beam splitter;

FIG. 5 is a schematic structural diagram of a downlink signal frame according to the present application; FIG.

6 is a flowchart of another point-to-multipoint optical fiber transmission method provided by the present application;

FIG. 7 is a schematic structural diagram of a frame of an uplink signal provided by the present application;

Figure 8 is a structural diagram of a radio control device REC provided by the present application;

FIG. 9 is a structural diagram of another radio control device REC provided by the present application; FIG.

FIG. 10 is a structural diagram of another radio control device REC provided by the present application; FIG.

Figure 11 is a structural diagram of another radio control device REC provided by the present application;

Figure 12 is a structural diagram of a radio device RE provided by the present application;

FIG. 13 is a structural diagram of another radio device RE provided by the present application.

Detailed ways

The technical solutions in the present application are clearly and completely described in the following with reference to the drawings in the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

The terms "first", "second", "third", "fourth", etc. (if present) in the specification and claims of the present application and the above figures are used to distinguish similar objects without having to use To describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

The present application draws on a fixed broadband network (Passive optical network (PON) network architecture, and introduces a passive optical power beam splitter (also called an optical passive beam splitter) in the BBU-RRU transmission, through passive optical power. The beam splitter, REC is connected to multiple REs at the same time, and is connected by a fiber between the REC and the passive optical power splitter, and multiple REs are connected at the proximal end of the RE through a passive optical power beam splitter. A passive optical power splitter is a passive optical fiber device that is inexpensive and has the same reliability as a fiber link. For the PON network architecture, refer to FIG. 2. In FIG. 2, an Optical Line Terminal (OLT) and an Optical Network Termination (ONT) are implemented by Time Division Multiple (TDM). Communication, that is, the downlink OLT broadcasts all signals, and each OLT receives its own information according to its own identity; the uplink is performed by Time Division Multiple Access (TDMA), and each ONT is under the control of the OLT, at the time of allocation. Send signals in the gap to avoid collisions between signals sent by each ONT.

Since the bandwidth of the PON network only supports 10Gb/s, the bandwidth requirement for mobile preamble is much higher than this. At least the rate of 25Gb/s and the split ratio of 1:8 are required to meet the point-to-multipoint between BBU-RRUs. Pre-networking needs. The current PON is for data services or TDM services, such as the Ethernet/E1 transmission interface, and the CPRI interface is essentially different from the existing Ethernet/E1 interface, and cannot be directly utilized from the delay variation, clock synchronization accuracy, and transmission mode parameters. The existing PON network carrying the data service or the TDM service directly performs CPRI transmission to implement communication between the REC and the RE. This leads to a point-to-multipoint optical fiber transmission scheme proposed by the present application.

The method for transmitting the point-to-multipoint optical fiber in the present application is described below by using a specific embodiment. Referring to FIG. 3, an embodiment of the point-to-multipoint optical fiber transmission method in the present application includes:

101. The radio control device REC configures an identifier for the target radio device RE.

In this embodiment, the REC and the at least two REs form a tree-shaped fiber link, and the REC configures an identifier for each RE, such as a target RE configuration identifier.

The REC may choose to separately notify each RE of the identifier assigned to it, so that each RE obtains its own identity, and paves the way for receiving the downlink signal according to the identifier.

102. The REC sends at least two downlink signals to the at least two REs, where the target downlink signal of the at least two downlink signals carries an identifier, so that the target RE of the at least two REs receives the target downlink signal according to the identifier, and the REC and the The at least two REs described above constitute a tree-shaped fiber link.

In this embodiment, after the REC configures the identifier for the target RE, the REC sends at least two downlink signals to the at least two REs connected thereto, and one of the at least two downlink signals carries the identifier, so that the foregoing The target RE in at least two REs only accepts the target downlink signal belonging to itself according to the identifier.

In some possible embodiments, the foregoing REC sending at least two downlink signals to the at least two REs may be:

The REC transmits at least two downlink signals to the at least two REs through the optical passive beam splitter.

The present application provides a schematic diagram of a REC connected to at least two REs through a passive optical power beam splitter (also referred to as an optical passive beam splitter). See FIG. 4 for details.

It can be seen that an implementation of a tree-shaped fiber link is provided. The tree-shaped fiber link is more in line with the actual RE physical network topology, and the fiber is saved compared to the chain link and the ring link, especially the backbone fiber. .

For example, it is assumed that through the optical passive beam splitter, the REC connects three REs, RE1, RE2, and RE3, and the REC assigns the identifier A to the RE1, the REC assigns the identifier B to the RE2, and the REC assigns the identifier C to the RE3. The REC broadcasts the downlink signal a, the downlink signal b, and the downlink signal c. The downlink signal a carries the identifier A, the downlink signal b carries the identifier B, and the downlink signal c carries the identifier C. RE1 receives the downlink signal a according to the identifier A, RE2 receives the downlink signal b according to the identifier B, and the RE3 receives the downlink signal c according to the identifier C.

It is to be understood that the above-mentioned examples are only used to describe a point-to-multipoint optical fiber transmission method provided by an embodiment of the present application. Other examples may be used to describe a point-to-multipoint optical fiber transmission provided by an embodiment of the present application. The method is not limited herein.

In this embodiment, the REC is the target RE configuration identifier; the REC sends at least two downlink signals to the at least two REs, and the target downlink signal in the at least two downlink signals carries the identifier, so that the target REs in the at least two REs are based on The target downlink signal is identified, and the REC and the at least two REs form a tree fiber link. Therefore, the transmission between each RE and REC is independent of each other. The tree-shaped fiber link saves the fiber, and the REC supports the connection of more REs.

In some possible embodiments, the method may further include:

The REC configures an uplink time slot for each of the at least two REs, so that each RE determines the transmission time of the uplink signal according to the uplink time slot configured for it.

It can be seen that the transmission timing of the uplink signal of the RE needs to be accurately controlled by the REC to avoid collision of uplink transmission between multiple REs, so that different REs need to insert the time slot required by the REC before transmitting the uplink signal.

It should be noted that the uplink and downlink of the REC and the RE need to ensure strict delay symmetry. The RE needs to insert the time slot required by the REC before transmitting the uplink signal, and the REC should also insert the same time slot before broadcasting the downlink signal.

In some possible embodiments, the method may further include:

The REC samples the upstream signal through the local clock to complete the synchronization of the clocks of the respective REs with the local clock.

It can be seen that, in order to ensure that the clocks of the REs are synchronized with the local clock, for example, the clock synchronization is completed within the uplink burst overhead time, the REC needs to resample the uplink signal of the RE through the REC local clock.

In addition, it should be understood that each RE and REC are physically connected directly, and the REs are independent of each other and have no effect on the clock.

In some possible embodiments, the method may further include:

When the REC detects that there is a RE open station, it re-ranges the RE that has the open station; or, when it detects the presence of the RE fault, re-ranges the faulty RE.

In order to enable the REC to be automatically accessed when the REs of different distances are deployed, the uplink direction needs to stop the service transmission periodically to provide the RE access network opportunity. Since the RE ranging needs to be performed only when the RE starts or fails, setting the ranging mechanism requires a fault or the network management trigger to open the ranging window, reducing the impact of the ranging on the normal RE service. By storing the original ranging information, the ranging window can be shortened without affecting the operation of other REs.

In some possible embodiments, the downlink signal includes a superframe, and the frame structure of the superframe includes an identifier field and a physical layer control information field.

The frame structure of a possible downlink signal provided by the present application can be seen in FIG. 5. In FIG. 5, the length of the CPRI 10 ms frame is guaranteed to be constant, and several bytes are added in front of each RE on the Hyperframe structure. Overhead, where the payload portion contains all Hyperframes belonging to this RE. Overhead includes an identification field and a physical layer control information field.

It should be noted that each 10ms frame can be divided into 150 superframes, numbered from 0 to 149, and each superframe contains 256 basic frames, numbered from 0 to 255.

In some possible embodiments, the point-to-multipoint CPRI interface in the present application may perform hardware upgrade on an existing CPRI interface. To protect the original REC and RE, the present application may provide a point-to-multipoint CPRI interface function. It is integrated into a pluggable CPRI optical module and provides a point-to-point hardware interface for the REC and RE. This protects the existing REC and RE. You can upgrade to a point-to-multipoint network only by replacing the CPRI optical module.

In some possible embodiments, since the RE transmission bandwidth is fixedly configured, the fixed bandwidth allocation scheme is adopted on the REC in the present application to meet the requirement, and the required bandwidth is negotiated and determined when the RE accesses the network.

Referring to FIG. 6, another embodiment of the point-to-multipoint optical fiber transmission method in the present application includes:

201. The radio device RE determines, according to the acquired uplink time slot, a sending time of the uplink signal, where the frame structure of the uplink signal includes an identifier field and a physical layer burst overhead field.

In this embodiment, in order to avoid collision or collision of the uplink signal during transmission, the RE determines the transmission timing of the uplink signal according to the acquired uplink time slot. In addition, the frame structure of the uplink signal includes an identity field and a physical layer burst overhead field. It can be understood that the frame structure of the uplink signal is similar to the frame structure of the foregoing downlink signal, and the only difference is that in addition to the identifier in the frame structure of each uplink signal, a physical layer burst overhead field of less than 8 bytes is added, and the physical layer The burst overhead field is used for receiving the burst receiver recovery threshold and implementing synchronization. In addition, the frame structure of the uplink signal may further include a physical layer control information field, and the content of the physical layer control information field in the frame structure of the uplink signal is The content of the physical layer control information field in the frame structure of the downlink signal is different. The frame structure of a possible uplink signal provided by the present application can be seen in FIG. 7.

202. The RE sends an uplink signal to the radio control device REC according to the sending moment, and the REC and the at least two REs form a tree-shaped fiber link.

In this embodiment, after determining the sending time of the uplink signal, the RE sends the uplink signal according to the sending time to avoid collision or collision of the uplink signal during the transmission.

The point-to-multipoint optical fiber transmission method in the present application is described above by using an embodiment. The radio control device REC in the present application is introduced by an embodiment, and the REC and the at least two radio devices RE form a tree-shaped optical fiber link. Figure 8, an embodiment of the radio control device REC in the present application includes:

The configuration module 301 is configured to configure an identifier for the target RE.

The sending module 302 is configured to send at least two downlink signals to the at least two REs, where the target downlink signal of the at least two downlink signals carries an identifier, so that the target RE of the at least two REs receives the target downlink signal according to the identifier. .

In this embodiment, the configuration module 301 configures an identifier for the target RE; the sending module 302 sends at least two downlink signals to the at least two REs, and the target downlink signal of the at least two downlink signals carries the identifier, so that at least two REs are included. The target RE receives the target downlink signal according to the identifier, and the REC and the at least two REs form a tree-shaped fiber link. Therefore, the transmission between each RE and REC is independent of each other. The tree-shaped fiber link saves the fiber, and the REC supports the connection of more REs.

In some possible embodiments, the sending module 302 is specifically configured to separately send at least two downlink signals to the at least two REs through the optical passive beam splitter.

In some possible embodiments, the configuration module 301 is further configured to separately configure an uplink time slot for the at least two REs, so that each RE determines a transmission time of the uplink signal according to the uplink time slot configured for the RE.

It can be seen that the sending time of the uplink signal of the RE needs to be accurately controlled by the configuration module 301 to avoid collision of uplink transmission between multiple REs, so that different REs need to insert the time slot required by the configuration module 301 before transmitting the uplink signal.

On the basis of the embodiment shown in FIG. 8, further, referring to FIG. 9, in some possible embodiments, the REC further includes:

The sampling module 401 is configured to sample the uplink signal by using a local clock to complete synchronization of the clocks of the REs with the local clock.

It can be seen that, in order to ensure that the clocks of the REs are synchronized with the local clock, for example, the clock synchronization is completed in the uplink burst overhead time, the sampling module 401 needs to resample the uplink signals of the REs through the REC local clock.

On the basis of the embodiment shown in FIG. 8, further, referring to FIG. 10, in some possible embodiments, the REC further includes:

The ranging module 501 is configured to re-range the RE that has the open station when detecting that there is a RE open station; or

The ranging module 501 is further configured to re-range the faulty RE when detecting that there is an RE fault.

It can be seen that, in order to enable the REs to be automatically accessed when the REs of different distances are deployed, the uplink direction needs to stop the service transmission periodically to provide the RE access network opportunity. Since the RE ranging needs to be performed only when the RE starts or fails, setting the ranging mechanism requires a fault or the network management trigger to open the ranging window, reducing the impact of the ranging on the normal RE service. By storing the original ranging information, the ranging window can be shortened without affecting the operation of other REs.

The REC in the present application is described above from the perspective of a modular functional entity. The following describes the REC in the present application from the perspective of hardware processing. Referring to FIG. 11, an embodiment of the REC in the present application includes: a processor 601, Transmitter 602 and memory 603.

The RECs referred to in this application may have more or fewer components than those shown in FIG. 11, may combine two or more components, or may have different component configurations or settings, each component may include one or more A combination of hardware, software, or a combination of hardware and software, such as signal processing and/or application specific integrated circuits.

The processor 601 is configured to perform the following operations:

Configure an identifier for the target RE;

The transmitter 602 is configured to perform the following operations:

Transmitting at least two downlink signals to the at least two REs, where the target downlink signal of the at least two downlink signals carries an identifier, so that the target RE of the at least two REs receives the target downlink signal according to the identifier.

The memory 603 is used to store instructions required by the processor 601 to perform corresponding operations.

In this embodiment, the processor 601 configures an identifier for the target RE; the transmitter 602 sends at least two downlink signals to the at least two REs, and the target downlink signal of the at least two downlink signals carries the identifier, so that at least two REs are included. The target RE receives the target downlink signal according to the identifier, and the REC and the at least two REs form a tree-shaped fiber link. Therefore, the transmission between each RE and REC is independent of each other. The tree-shaped fiber link saves the fiber, and the REC supports the connection of more REs.

The transmitter 602 is also used to perform the following operations:

At least two downlink signals are respectively transmitted to the at least two REs through the optical passive beam splitter.

The processor 601 is further configured to perform the following operations:

The uplink time slots are respectively configured for at least two REs, so that each RE determines the transmission time of the uplink signal according to the uplink time slot configured for it.

The processor 601 is further configured to perform the following operations:

The upstream signal is sampled by the local clock to complete the synchronization of the clocks of the respective REs with the local clock.

The processor 601 is further configured to perform the following operations:

When it is detected that there is a RE open station, re-ranging the RE having the open station; or,

When it is detected that there is an RE failure, the faulty RE is re-ranged.

The following describes the radio device RE in the present application by using the embodiment. At least two REs and the radio control device REC form a tree-shaped fiber link. Referring to FIG. 12, an embodiment of the radio device RE in the present application includes:

The determining module 701 is configured to determine, according to the acquired uplink time slot, a sending time of the uplink signal, where the frame structure of the uplink signal includes an identifier field and a physical layer burst overhead field;

The sending module 702 is configured to send an uplink signal to the REC according to the sending moment.

In this embodiment, after determining the sending time of the uplink signal, the determining module 701 sends the uplink signal according to the sending time to avoid collision or collision of the uplink signal during the transmission.

In some possible embodiments, the physical layer control information field is also included in the frame structure of the uplink signal.

The RE in the present application is described above from the perspective of a modular functional entity. The RE in the present application is described below from the perspective of hardware processing. Referring to FIG. 13, an embodiment of the RE in the present application includes: a processor 801, Transmitter 802 and memory 803.

The REs referred to in this application may have more or fewer components than those shown in FIG. 13, may combine two or more components, or may have different component configurations or settings, each component may include one or more A combination of hardware, software, or a combination of hardware and software, such as signal processing and/or application specific integrated circuits.

The processor 801 is configured to perform the following operations:

Determining, according to the obtained uplink time slot, a sending time of the uplink signal, where the frame structure of the uplink signal includes an identifier field and a physical layer burst overhead field;

The transmitter 802 is configured to perform the following operations:

The uplink signal is sent to the REC according to the transmission time.

The memory 803 is used to store instructions required by the processor 801 to perform corresponding operations.

In this embodiment, after determining the sending time of the uplink signal, the processor 802 sends the uplink signal according to the sending time to avoid collision or collision of the uplink signal during the transmission.

In the above embodiments, it may be implemented in whole or in part by software, hardware, or a combination thereof. When implemented in software or a combination of software hardware, 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. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a storage medium or transferred from one storage medium to another. For example, the computer instructions can be routed from one website site, computer, server or data center to another website site by wire (eg, coaxial cable, twisted pair, fiber optic) or wireless (eg, infrared, wireless, microwave, etc.), Transfer from a computer, server, or data center. The storage medium may be any medium that the computer can store or a data storage device that includes one or more media integrated servers, data centers, and the like. The medium may be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape, an optical medium such as an optical disk, or a semiconductor medium such as a solid state disk (SSD).

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network devices. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present application.

The relevant parts of the embodiments of the present application may be referred to each other, including: the relevant parts of the method embodiments may be referred to each other; the apparatus provided by each device embodiment is used to execute the method provided by the corresponding method embodiment, so each device Embodiments can be understood with reference to relevant portions of the related method embodiments.

The device structure diagrams given in the various device embodiments of the present application show only a simplified design of the corresponding device. In practical applications, the device may include any number of communication modules, processors, memories, etc., to implement the functions or operations performed by the device in the device embodiments of the present application, and all devices that can implement the present application are in the present application. Within the scope of protection of the application.

The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto. A person skilled in the art can modify the technical solutions described in the foregoing embodiments, and the modifications do not deviate from the scope of the claims.

Claims

A point-to-multipoint optical fiber transmission method, comprising:

The radio control device REC configures an identity for the target radio RE;

Transmitting, by the REC, at least two downlink signals to at least two REs, where the target downlink signal of the at least two downlink signals carries the identifier, so that the target RE of the at least two REs is according to the The identifier receives the target downlink signal, and the REC and the at least two REs form a tree-shaped fiber link.
The method according to claim 1, wherein the sending, by the REC, the at least two downlink signals to the at least two REs includes:

The REC transmits at least two downlink signals to the at least two REs through the optical passive beam splitter.
The method according to claim 1 or 2, wherein the method further comprises:

The REC configures an uplink time slot for each of the at least two REs, so that each RE determines a transmission time of an uplink signal according to an uplink time slot configured for the RE.
The method of claim 3, wherein the method further comprises:

The REC samples the uplink signal by using a local clock to complete synchronization of the clocks of the REs with the local clock.
The method according to claim 1 or 2, wherein the method further comprises:

When the REC detects that there is a RE open station, the REC performs re-ranging on the RE that has the open station;

or,

When the REC detects the presence of an RE failure, the REC re-ranges the faulty RE.
The method according to claim 1 or 2, wherein the downlink signal comprises a superframe, and the frame structure of the superframe includes an identifier field and a physical layer control information field.
A point-to-multipoint optical fiber transmission method, comprising:

The radio equipment RE determines the transmission time of the uplink signal according to the obtained uplink time slot, and the frame structure of the uplink signal includes an identifier field and a physical layer burst overhead field;

The RE sends the uplink signal to the radio control device REC according to the sending moment, and the REC and at least two of the REs form a tree-shaped fiber link.
The method according to claim 7, wherein the frame structure of the uplink signal further includes a physical layer control information field.
A radio control device REC, characterized in that the REC and at least two radio devices RE form a tree-shaped fiber link, comprising:

a configuration module, configured to configure an identifier for the target RE;

a sending module, configured to send at least two downlink signals to the at least two REs, where the target downlink signal of the at least two downlink signals carries the identifier, so that the target RE of the at least two REs is according to The identifier receives the target downlink signal.
The REC according to claim 9, wherein the sending module is specifically configured to separately send at least two downlink signals to the at least two REs through the optical passive beam splitter.
The REC according to claim 9 or 10, wherein the configuration module is further configured to separately configure an uplink time slot for the at least two REs, so that each RE determines an uplink signal according to an uplink time slot configured for the same. The moment of sending.
The REC according to claim 11, wherein the REC further comprises:

And a sampling module, configured to sample the uplink signal by using a local clock, to complete synchronization of the clocks of the REs with the local clock.
The REC according to claim 9 or 10, wherein the REC further comprises:

a ranging module, configured to re-range the RE that has the open station when detecting that there is a RE open station;

or,

The ranging module is further configured to re-range the faulty RE when detecting that there is an RE fault.
The REC according to claim 9 or 10, wherein the downlink signal comprises a superframe, and the frame structure of the superframe includes an identifier field and a physical layer control information field.
A radio device RE, characterized in that the at least two REs and the radio control device REC form a tree-shaped fiber link, comprising:

a determining module, configured to determine, according to the obtained uplink time slot, a sending time of the uplink signal, where the frame structure of the uplink signal includes an identifier field and a physical layer burst overhead field;

And a sending module, configured to send the uplink signal to the REC according to the sending moment.
The RE according to claim 15, wherein the frame interface of the uplink signal further includes a physical layer control information field.
A computer storage medium having stored thereon a computer program, characterized in that the program is executed by a processor to implement the steps of the method of any one of claims 1 to 6, or the program is implemented by a processor such as The steps of the method of any of claims 7 or 8.