Multi-station communication network system and light distribution control method thereof

Abstract

The invention discloses a multi-station communication network system and a light distribution control method thereof, the multi-station communication network system comprises a plurality of independent areas, each independent area comprises an optical main unit and a plurality of optical far-end units, each optical main unit comprises four optical ports, the first optical port is connected with the optical main unit of the left adjacent area, and the second optical port is connected with the optical far-end unit of the right adjacent area. The optical main unit is connected with the optical main unit of a right adjacent area through a fourth optical port, is connected with a plurality of optical far-end units of the area through a third optical port, and is connected with a plurality of optical far-end units of a left adjacent area through a second optical port, and the optical main unit, the signal forwarding mechanism and the cascade intercommunication mechanism are arranged and managed. When the management optical main unit or the link fails, performing backup or switching according to the set management optical main unit, the signal forwarding mechanism and the cascade intercommunication mechanism so as to perform normal communication; therefore, the user communication efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and in particular to a multi-station communication network system and a method for optical distribution control of a multi-station communication network system. Background Technology

[0002] In related technologies, achieving interconnection between regions is a crucial technology in standalone networking mode. In areas with multiple tunnels or subway stations, signal calls are only made within the local area and are not sent to other areas, requiring third-party equipment to intervene in calls between the local area and other networked areas. Therefore, a communication system that can interconnect with other areas and serve as a backup is needed, allowing devices in the local area to call devices in any other area. When the optical master unit in the local area fails, it can automatically connect to the optical master unit in a neighboring area for unified management communication, improving user communication efficiency and providing an extra layer of protection for user communication. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in the aforementioned technologies. Therefore, one objective of this invention is to provide a multi-station communication network system that ensures that when one OMU device is damaged or its fiber optic cable is disconnected, its downstream ORUs can still communicate via other OMUs; when an ORU is damaged or its fiber optic cable is disconnected, the downstream ORUs of that damaged ORU can also transmit data back to their local OMUs via neighboring OMUs, allowing them to function normally; and any device can call other devices within the same network, thereby improving user communication efficiency.

[0004] The second objective of this invention is to propose an optical distribution control method for a multi-station communication network system.

[0005] To achieve the above objectives, the first aspect of this invention proposes a multi-station communication network system, comprising multiple independent areas. Each independent area includes an optical master unit and multiple optical remote units. Each optical master unit includes four optical ports: a first optical port connecting it to the optical master unit of the left neighboring area, a fourth optical port connecting it to the optical master unit of the right neighboring area, a third optical port connecting it to multiple optical remote units in the same area, and a second optical port connecting it to multiple optical remote units in the left neighboring area. By setting up a management optical master unit, a signal forwarding mechanism, and a cascading interconnection mechanism, backup or switching can be performed according to the set management optical master unit, signal forwarding mechanism, and cascading interconnection mechanism in the event of a management optical master unit or link failure, so as to maintain normal communication. Therefore, it can be ensured that when one OMU device is damaged or the fiber optic cable is disconnected, its downstream ORUs can make calls through other OMUs; when an ORU device is damaged or the fiber optic cable is disconnected, the ORUs downstream of the damaged ORU can also transmit back to the local OMU for normal operation through the neighboring OMU, and any device can call other devices under the same network, thereby improving user communication efficiency.

[0006] In addition, the multi-station communication network system proposed according to the present invention may also have the following additional technical features:

[0007] Optionally, the leftmost independent area can be pre-configured as the normally connected optical master unit as the management optical master unit.

[0008] Optionally, the signal forwarding mechanism includes the optical master unit superimposing the received RX data of all downstream optical remote units with its own RX data, and then sending it down to each neighboring optical remote unit through the optical port; at the same time, the management optical master unit forwards the IQ data of the neighboring optical master units through its own TX, but does not send its own RX data directly to the TX.

[0009] Optionally, the cascade interconnection mechanism includes left-way signal interconnection and right-way signal interconnection. The left-way signal interconnection includes the optical master unit being fixedly connected to the fourth optical port of the left optical master unit through the first optical port to receive IQ data from the left optical master unit. The right-way signal interconnection includes the optical master unit being fixedly connected to the first optical port of the right optical master unit through the fourth optical port to send its own and the IQ data of the left optical master unit to the right optical master unit.

[0010] Optionally, in the event of a failure in the management optical master unit or link, backup or switching can be performed according to the configured management optical master unit, signal forwarding mechanism, and cascading interconnection mechanism. This includes: if the first optical port of the optical master unit can receive data from the left optical master unit, then the first, second, and third optical ports are combined with its own RX data and sent to the optical remote unit; if the first optical port of the optical master unit cannot receive data from the left optical master unit, but the fourth optical port can receive data from the management optical master unit, then the system automatically switches to the backup link, and the fourth, second, and third optical ports are combined with its own RX data and sent to the optical remote unit; if the first optical port of the optical master unit cannot receive data from the left optical master unit, and the fourth optical port cannot receive data from the management optical master unit, then the second and third optical ports are combined with its own RX data and sent to the optical remote unit, and the optical master unit is converted into a management optical master unit.

[0011] To achieve the above objectives, a second aspect of the present invention proposes an optical distribution control method for a multi-station communication network system. The multi-station communication network system includes multiple independent areas, each independent area comprising an optical master unit and multiple optical remote units. Each optical master unit includes four optical ports: a first optical port connecting it to the optical master unit of the left neighboring area, a fourth optical port connecting it to the optical master unit of the right neighboring area, a third optical port connecting it to multiple optical remote units in the same area, and a second optical port connecting it to multiple optical remote units of the left neighboring area. The optical distribution control method includes the following steps: setting up a management optical master unit, a signal forwarding mechanism, and a cascading interconnection mechanism; and performing backup or switching based on the set management optical master unit, signal forwarding mechanism, and cascading interconnection mechanism in the event of a management optical master unit or link failure, to ensure normal communication. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a multi-station communication network system according to an embodiment of the present invention;

[0013] Figure 2 This is a schematic diagram of the fault structure of a multi-station communication network system according to an embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of the fault structure of a multi-station communication network system according to an embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of the fault structure of a multi-station communication network system according to an embodiment of the present invention;

[0016] Figure 5 This is a schematic diagram of a multi-station communication network system according to an embodiment of the present invention. Detailed Implementation

[0017] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0018] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the invention to those skilled in the art.

[0019] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0020] refer to Figure 1 As shown, the multi-station communication network system proposed in this embodiment of the invention includes multiple independent areas. Each independent area includes an optical master unit and multiple optical remote units. Each optical master unit includes four optical ports. It is connected to the optical master unit of the left neighboring area through the first optical port, connected to the optical master unit of the right neighboring area through the fourth optical port, connected to multiple optical remote units in the same area through the third optical port, and connected to multiple optical remote units of the left neighboring area through the second optical port. By setting up a management optical master unit, a signal forwarding mechanism, and a cascading interconnection mechanism, backup or switching is performed according to the set management optical master unit, signal forwarding mechanism, and cascading interconnection mechanism in the event of a management optical master unit or link failure, so as to maintain normal communication.

[0021] As an example, the leftmost independent area is pre-configured as the normally connected optical master unit as the management optical master unit.

[0022] In other words, the role of the optical master unit (OMU) in the system is first clarified. The first OMU on the left is the master OMU (OMU-L) by default, and the rest are slave OMUs. At the same time, it is stipulated that the "first OMU on the left that is connected normally" automatically becomes the management OMU, responsible for the unified management of the configuration and communication of the entire network. This provides the foundation for the "core management node" for subsequent signal forwarding and fault switching, ensuring that the system has a clear control center.

[0023] As an example, the signal forwarding mechanism includes the optical master unit superimposing the received RX data of all downstream optical remote units with its own RX data, and then sending it down to each neighboring optical remote unit through the optical port; at the same time, the management optical master unit forwards the IQ data of the neighboring optical master units through its own TX, but does not send its own RX data directly to the TX (to avoid signal backhaul interference).

[0024] It should be noted that in order to achieve signal coverage synchronization of all optical remote units (ORUs), the OMU needs to merge the received signals (IQ data) of all downstream ORUs with its own received IQ data and then distribute them uniformly, thereby solving the problem of "inconsistent signals in the coverage areas of multiple ORUs" and ensuring that there is no delay or disconnection in cross-station calls.

[0025] As one embodiment, the cascade interconnection mechanism includes left-way signal interconnection and right-way signal interconnection. The left-way signal interconnection includes the optical master unit being fixedly connected to the fourth optical port of the left optical master unit through the first optical port to receive IQ data from the left optical master unit. The right-way signal interconnection includes the optical master unit being fixedly connected to the first optical port of the right optical master unit through the fourth optical port to send its own and the IQ data of the left optical master unit to the right optical master unit.

[0026] It should be noted that, through cascading, the IQ data of all OMUs can be shared throughout the network, achieving the core objective of "any device in any area can call devices in other areas".

[0027] As an example, when the optical master unit or link fails, backup or switching is performed according to the set management optical master unit, signal forwarding mechanism, and cascading interconnection mechanism, including: if the first optical port of the optical master unit can receive data from the left optical master unit, then the first, second, and third optical ports are combined with its own RX data and sent to the optical remote unit; if the first optical port of the optical master unit cannot receive data from the left optical master unit, but the fourth optical port can receive data from the management optical master unit, then it automatically switches to the backup link, and the fourth, second, and third optical ports are combined with its own RX data and sent to the optical remote unit; if the first optical port of the optical master unit cannot receive data from the left optical master unit, and the fourth optical port cannot receive data from the management optical master unit, then the second and third optical ports are combined with its own RX data and sent to the optical remote unit, and the optical master unit is converted into a management optical master unit.

[0028] It should be noted that the logic of "automatic detection - link switching - role upgrade" enables seamless backup in the event of a single device or link failure, ensuring system reliability and thus achieving the goal of interconnection and mutual backup among multiple stations.

[0029] In summary, the multi-station communication network system proposed in this invention provides a feasible solution for VHF system applications in subway systems where multiple stations and tunnels need to be interconnected and mutually backed up. This system ensures that if one OMU device is damaged or its fiber optic cable is disconnected, its downstream ORUs can still communicate via other OMUs. If an ORU is damaged or its fiber optic cable is disconnected, the ORUs connected to that damaged ORU can still transmit data back to their local OMUs via neighboring OMUs, allowing them to function normally. Furthermore, any device can call other devices within the same network.

[0030] Furthermore, this invention also proposes an optical distribution control method for a multi-station communication network system. The multi-station communication network system includes multiple independent areas. Each independent area includes an optical master unit and multiple optical remote units. Each optical master unit includes four optical ports: a first optical port connected to the optical master unit of the left neighboring area, a fourth optical port connected to the optical master unit of the right neighboring area, a third optical port connected to multiple optical remote units in the same area, and a second optical port connected to multiple optical remote units of the left neighboring area. The optical distribution control method includes the following steps:

[0031] S101, configures the management optical master unit, signal forwarding mechanism and cascading interoperability mechanism;

[0032] S102, when the optical master unit or link fails, performs backup or switching according to the set optical master unit, signal forwarding mechanism and cascading interconnection mechanism to maintain normal communication.

[0033] As a specific embodiment, the optical distribution control method of a multi-station communication network system includes the following steps:

[0034] S1: Define the first OMU on the left as the master OMU device type, and the rest of the OMUs as slave OMU device types, and define the first normally connected device on the left as the management OMU.

[0035] S2: OMU Forwarding Mechanism: To achieve signal coverage synchronization for all ORUs connected to the OMU, the IQ data received by the RX of all ORUs connected to the OMU needs to be transmitted to the OMU, and the IQ signals received by the OMU's RX are combined and uniformly distributed to each ORU by the OMU. The IQ data of the ORUs and the IQ data of neighboring cells received by the OMU need to be transmitted through the OMU's TX, but the data received by the OMU's RX is not sent to the OMU's TX.

[0036] S3: IQ data interoperability mechanism between OMU and OMU-L: OP1 is fixed to connect to the OP4 port of the left OMU (this OMU is referred to as OMU-L), and OP1 is fixed as the CPRI Client; OMU-L and the OMU further to the left can interoperate with the OMU through OP4. The logical relationship is as follows: The OMU receives the IQ data of OMU-L through OP1 (this data includes the OMU-L itself and all radio frequency received data through the optical ports of OMU-L's OP1, OP2, and OP3, but does not include the data received by OP4), and transmits the IQ data of the OMU (this data includes the OMU itself and all radio frequency received data through the optical ports of OMU's OP2, OP3, and OP4, but does not include the data received by OP1) to OMU-L through OP1;

[0037] S4: IQ data interoperability mechanism between OMU and OMU-R: OP4 is used as a backup for OP1, connecting to the leftmost OMU or the downstream OMU (denoted as OMU-R). OP4 is always the CPRI Master. When OP4 is backing up the first OMU, if the OMU's OP1 port receives the master OMU flag, the IQ data reception and transmission of OP4 will be disconnected; otherwise, it will be enabled. The OMU transmits its IQ data (including the OMU itself and all RF received data through the OMU's OP1, OP2, and OP3 optical ports, excluding data received by OP4) to OMU-R through OP4. It also receives OMU-R's IQ data (including the OMU-R itself and all RF received data through the OMU-R's OP2, OP3, and OP4 optical ports, excluding data received by OP1) through OP4.

[0038] S5: Loop and backup mechanisms: (C1, C2, and C3 form a loop, C5 is the backup link) The IQ data packet carries the OMU flag:

[0039] Scenario 1: When OP2 is synchronized but cannot receive OMU-L data, it is determined that the OMU-L cascading is disconnected. In this case, OP2 is allowed to send and receive data.

[0040] Scenario 1-1: For example Figure 2 As shown, it is determined whether OP1 can receive data from OMU-L. If it can receive data from OMU-L, it indicates that the C2 connection is normal. The OMU superimposes the IQ data from OP1, OP2, and OP3 with the IQ data from the OMU and sends it to OP2. The OMU sends the network data received by OP1 to OP2 (managed by the management OMU).

[0041] Scenario 1-2: such as Figure 3 As shown, if OP1 cannot receive data from OMU-L, it indicates that the C2 connection has failed. Then, it checks whether OP4 can receive data from the management OMU. If OP4 can receive data from the management OMU, it indicates that the C5 connection is normal. The OMU then superimposes the IQ data from OP4, OP2, and OP3 with the OMU's IQ data and sends it to OP2. The OMU sends the network data received by OP4 to OP2 (managed by the management OMU).

[0042] Scenario 1-3: such as Figure 4As shown, if OP1 cannot receive data from OMU-L, it indicates that the C2 connection has failed. Then, it checks whether OP4 can receive data from the management OMU. If OP4 cannot receive data from the management OMU, it indicates that the C5 connection has failed. In this case, the OMU combines the IQ data from OP2 and OP3 with its own IQ data and sends it to OP2. The OMU then sends its network data to OP2, at which point it becomes a management OMU (managed by the OMU).

[0043] Scenario 2: such as Figure 5 As shown, once OP2 is synchronized, it can receive data from OMU-L, indicating that the cascading connection of OMU-L is normal. Therefore, OMU does not process the data from OP2 in any way.

[0044] S6: ORU Loop Mechanism: ORU's OP1 is the CPRI Slaver port by default, and OP2 is the Master port by default. After the device is powered on, it first searches for the OMU signal on OP1. If the OMU signal is not found after 30 seconds, it switches to the port type of OP1 and OP2 to continue searching for the OMU signal. If the OMU signal is not locked after 1 second, it switches to the port type of OP1 and OP2 again to continue searching until a port can receive the OMU signal.

[0045] It should be noted that the foregoing explanation of the embodiments of the multi-station communication network system also applies to the optical distribution control method of the multi-station communication network system in this embodiment, and will not be repeated here.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A multi-station communication network system, characterized in that, It includes multiple independent areas, each containing an optical master unit and multiple optical remote units. Each optical master unit has four optical ports: the first port connects to the optical master unit of the left neighboring area, the fourth port connects to the optical master unit of the right neighboring area, the third port connects to multiple optical remote units in the same area, and the second port connects to multiple optical remote units of the left neighboring area. By setting up a management optical master unit, a signal forwarding mechanism, and a cascading interconnection mechanism, backup or switchover is performed according to the set management optical master unit, signal forwarding mechanism, and cascading interconnection mechanism in the event of a management optical master unit or link failure, so as to maintain normal communication.

2. The multi-station communication network system as described in claim 1, characterized in that, The leftmost independent area is pre-configured as the management optical master unit, connected to a normal optical master unit.

3. The multi-station communication network system as described in claim 2, characterized in that, The signal forwarding mechanism includes the optical master unit superimposing the received RX data from all downstream optical remote units with its own RX data, and then sending it down to each neighboring optical remote unit through the optical port; at the same time, the management optical master unit forwards the IQ data of the neighboring optical master units through its own TX, but does not send its own RX data directly to the TX.

4. The multi-station communication network system as described in claim 3, characterized in that, The cascaded interconnection mechanism includes left-way signal interconnection and right-way signal interconnection. Left-way signal interconnection includes the optical master unit being fixedly connected to the fourth optical port of the left optical master unit through the first optical port to receive IQ data from the left optical master unit. Right-way signal interconnection includes the optical master unit being fixedly connected to the first optical port of the right optical master unit through the fourth optical port to send its own and the IQ data of the left optical master unit to the right optical master unit.

5. The multi-station communication network system as described in claim 4, characterized in that, In the event of a failure in the management optical master unit or link, backup or switchover is performed according to the configured management optical master unit, signal forwarding mechanism, and cascading interconnection mechanism, including: If the first optical port of the optical master unit can receive the data from the left optical master unit, then the first, second, and third optical ports are combined with its own RX data and sent to the optical remote unit. If the first optical port of the optical master unit cannot receive data from the left optical master unit, but the fourth optical port can receive data from the management optical master unit, it will automatically switch to the backup link and merge the fourth, second, and third optical ports with its own RX data and send it to the optical remote unit. If the first optical port of the optical master unit cannot receive data from the left optical master unit, and the fourth optical port cannot receive data from the management optical master unit, then the second and third optical ports are combined with its own RX data and sent to the optical remote unit, and that optical master unit is converted into a management optical master unit.

6. A method for optical distribution control in a multi-station communication network system, characterized in that, The multi-station communication network system includes multiple independent areas. Each independent area includes an optical master unit and multiple optical remote units. Each optical master unit includes four optical ports: a first optical port connecting it to the optical master unit of the left neighboring area, a fourth optical port connecting it to the optical master unit of the right neighboring area, a third optical port connecting it to multiple optical remote units in the same area, and a second optical port connecting it to multiple optical remote units of the left neighboring area. The optical distribution control method includes the following steps: Configure and manage the optical master unit, signal forwarding mechanism, and cascading interoperability mechanism; When the optical master unit or link fails, backup or switchover is performed according to the configured optical master unit management, signal forwarding mechanism and cascading interconnection mechanism to maintain normal communication.

7. The optical distribution control method for a multi-station communication network system as described in claim 6, characterized in that, The leftmost independent area is pre-configured as the management optical master unit, connected to a normal optical master unit.

8. The optical distribution control method for a multi-station communication network system as described in claim 7, characterized in that, The signal forwarding mechanism includes the optical master unit superimposing the received RX data from all downstream optical remote units with its own RX data, and then sending it down to each neighboring optical remote unit through the optical port; at the same time, the management optical master unit forwards the IQ data of the neighboring optical master units through its own TX, but does not send its own RX data directly to the TX.

9. The optical distribution control method for a multi-station communication network system as described in claim 8, characterized in that, The cascaded interconnection mechanism includes left-way signal interconnection and right-way signal interconnection. Left-way signal interconnection includes the optical master unit being fixedly connected to the fourth optical port of the left optical master unit through the first optical port to receive IQ data from the left optical master unit. Right-way signal interconnection includes the optical master unit being fixedly connected to the first optical port of the right optical master unit through the fourth optical port to send its own and the IQ data of the left optical master unit to the right optical master unit.

10. The optical distribution control method for a multi-station communication network system as described in claim 9, characterized in that, In the event of a failure in the management optical master unit or link, backup or switchover is performed according to the configured management optical master unit, signal forwarding mechanism, and cascading interconnection mechanism, including: If the first optical port of the optical master unit can receive the data from the left optical master unit, then the first, second, and third optical ports are combined with its own RX data and sent to the optical remote unit. If the first optical port of the optical master unit cannot receive data from the left optical master unit, but the fourth optical port can receive data from the management optical master unit, it will automatically switch to the backup link and merge the fourth, second, and third optical ports with its own RX data and send it to the optical remote unit. If the first optical port of the optical master unit cannot receive data from the left optical master unit, and the fourth optical port cannot receive data from the management optical master unit, then the second and third optical ports are combined with its own RX data and sent to the optical remote unit, and that optical master unit is converted into a management optical master unit.

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