Local Area Network Communication Methods and Systems in Optical Access Networks

Abstract

This invention provides a local area network (LAN) communication method and system in an optical access network. The method includes: a first ONU receiving a target carrier frequency fed back by an OLT, adjusting its local operating state to the target carrier frequency, and sending a LAN communication request and the target carrier frequency to a second ONU; the second ONU adjusting its local operating state to the target carrier frequency and feeding back communication agreement information to the first ONU; and the first ONU and the second ONU engaging in LAN communication. This invention proposes a data transmission mechanism for LAN communication between any two ONUs within the same optical access network. It further effectively solves the problem of how to accurately send and receive LAN interoperability optical signal messages between any two ONUs within the same optical access network at the signal transmission mechanism and standard level, thus further solidifying the foundation for LAN interoperability between any two ONU terminal optical modem users within the same optical access network.

Description

Technical Field

[0001] This invention relates to the field of optical communication technology, and in particular to a local area network communication method and system in an optical access network. Background Technology

[0002] With the widespread application of broadband services such as e-commerce, 4K high-definition video, and cloud computing, and the gradual rise of ultra-broadband services such as virtual reality, autonomous driving, artificial intelligence, and smart cities, ultra-broadband, ultra-large capacity, and low latency have gradually become new specifications for network system equipment. This has driven operators and internet companies to actively transform and upgrade existing network systems and equipment. For example, in the past 20 years, access networks have undergone technological innovation from telephone line access (Kbps rate) to copper wire access (Mbps rate) and then to fiber optic access (Gbps). The broadband speed for home users has rapidly increased from Kbps to Gbps. Currently, gigabit-speed GPON / EPON optical access networks have been fully deployed in urban and rural areas of China and have now entered the stage of large-scale deployment upgrades to 10G-GON / 10G-EPON. At the same time, the standardization project and system prototype development for the next-generation 50G-PON have also begun.

[0003] However, in the process of replacing copper wire access networks with optical access networks, the local area communication advantage of copper wire access has been lost. In the era of copper wire access, many users could be connected simultaneously through routers and switches on the same interface, forming a local area network (LAN) that could communicate directly with each other at the local layer. But in the era of fiber optic access, each household is directly connected to a terminal optical modem; even if the terminal optical modems of different users in the same building are deployed under the same ODN (Optical Distribution Network) and OLT, they cannot form a local physical transmission channel, let alone carry out local communication functions. The data services of each terminal optical modem need to be transmitted through a physical connection link established through the ODN network and the OLT and other upper-layer networks.

[0004] The inventor of this application has filed an invention patent, application number 202110818191.2, which solves the problem of local optical signal physical transmission between any two ONUs under the same optical access network from the perspective of physical channels, but its signal transmission mechanism still needs to be solved. Summary of the Invention

[0005] The main objective of this invention is to provide a local area network (LAN) communication method and system in an optical access network, aiming to propose a data transmission mechanism for LAN communication between any two ONUs in the same optical access network.

[0006] In a first aspect, the present invention provides a local area network (LAN) communication method in an optical access network, the LAN communication method comprising:

[0007] The first ONU receives the target carrier frequency fed back by the OLT based on the local area network communication request sent by the first ONU, and adjusts its local working state to the target carrier frequency;

[0008] The first ONU sends a local area network communication request and the target carrier frequency to the second ONU;

[0009] The second ONU adjusts its local operating state to the target carrier frequency and sends the agreed communication information back to the first ONU.

[0010] The first ONU communicates with the second ONU via a local area network.

[0011] Optionally, before the step of the first ONU receiving the target carrier frequency fed back by the OLT based on the local area network communication request sent by the first ONU and adjusting its local operating state to the target carrier frequency, the method further includes:

[0012] The OLT receives a local area network communication request sent by the first ONU;

[0013] OLT checks whether the current local area network communication conditions are met;

[0014] If the local area network communication conditions are met, the OLT selects a carrier frequency from the idle carrier frequencies as the target carrier frequency and feeds the target carrier frequency back to the first ONU.

[0015] Optionally, before the step of the OLT receiving the local area network communication request sent by the first ONU, the method further includes:

[0016] The OLT sends a service activation status detection command to all ONUs connected to this terminal;

[0017] After receiving the service activation status detection command, the ONU that has activated the local area network communication service sends back identification information containing the activated local area network communication service to the OLT.

[0018] The OLT sends identity information to the ONU containing the identification information of the activated LAN communication service, and configures the basic service information according to the number of identification information containing the activated LAN communication service received.

[0019] ONUs that have activated local area interoperability services will write the received identity information into the EEPROM unit of their respective modules and lock the identity information, using the identity information as the basis for determining whether the interoperability service data packet is sent by this ONU.

[0020] Optionally, the step of the OLT detecting whether the local area network communication conditions are currently met includes:

[0021] The OLT detects whether the number of ONUs that have carried out local area network communication services exceeds a preset threshold.

[0022] If the value exceeds the preset threshold, it is determined that the current conditions for local area network communication are not met.

[0023] If the value is not greater than the preset threshold, then the local area network communication conditions are determined to be met.

[0024] Optionally, before the step of the OLT detecting whether the local area network communication conditions are currently met, the method further includes:

[0025] The OLT sends a service execution status detection command to all ONUs connected to this terminal;

[0026] After receiving the service activation status detection command, the ONU that has already started local area network communication services sends the first local area interconnection tag back to the OLT;

[0027] After receiving the service activation status detection command, the ONU that has not yet started local area network communication services sends a second local area interconnection tag to the OLT;

[0028] The OLT counts the number of first local area communication tags received and uses the number of first local area communication tags as the number of ONUs that have carried out local area network communication services.

[0029] Optionally, after the step of the first ONU and the second ONU communicating over a local area network, the method further includes:

[0030] The OLT receives the local area network communication termination signal sent by the first ONU and sets the target carrier frequency to an idle state.

[0031] Optionally, the steps for the first ONU and the second ONU to communicate over a local area network include:

[0032] The first ONU and the second ONU communicate on a local area network using either frequency division multiplexing or time division multiplexing.

[0033] Optional:

[0034] When the first ONU and the second ONU communicate in a local area network based on frequency division multiplexing, the transmitting side modulates the interoperability service data packets onto the target carrier frequency through a modulator, converts them into modulated signals, and outputs them to the burst optical transmitting component on the transmitting side. The burst optical transmitting component then converts the modulated signals into optical signals and outputs them to the burst optical receiving component on the receiving side.

[0035] The burst optical receiving component converts the received optical signal into an electrical signal and outputs the electrical signal to the modem on the receiving side. The modem modulates the data to obtain the interoperable service data packet according to the target carrier frequency and the electrical signal.

[0036] Optional:

[0037] When the first ONU and the second ONU communicate in a local area network using time-division multiplexing, they transmit interoperability service data packets at preset time intervals. The interoperability service data packets include a clock data recovery preamble, interoperability service data packet sending side identification information, interoperability service tags, and interoperability service data. In a single communication process, the last transmitted interoperability service data packet also includes an end tag.

[0038] Secondly, the present invention also provides a local area network (LAN) communication system in an optical access network, the LAN communication system in the optical access network comprising:

[0039] OLT, used to feed back the target carrier frequency to the first ONU based on the local area network communication request sent by the first ONU;

[0040] The first ONU is used to receive the target carrier frequency, adjust its local operating state to the target carrier frequency, and send a local area network communication request and the target carrier frequency to the second ONU.

[0041] The second ONU is used to adjust the local operating state to the target carrier frequency and to send the agreed communication information back to the first ONU.

[0042] The first ONU and the second ONU are used for local area network communication.

[0043] In this invention, the first ONU receives the target carrier frequency fed back by the OLT based on the LAN communication request sent by the first ONU, and adjusts its local operating state to the target carrier frequency; the first ONU sends the LAN communication request and the target carrier frequency to the second ONU; the second ONU adjusts its local operating state to the target carrier frequency and feeds back the agreed communication information to the first ONU; the first ONU and the second ONU then conduct LAN communication. This invention proposes a data transmission mechanism for LAN communication between any two ONUs under the same optical access network, and further effectively solves the problem of how to accurately send and receive local interoperability optical signal messages between any two ONUs under the same optical access network at the signal transmission mechanism and standard level, thus further solidifying the foundation for LAN interoperability between any two ONU terminal optical modem users under the same optical access network. Attached Figure Description

[0044] Figure 1 This is a flowchart illustrating the first embodiment of the local area network communication method in the optical access network of the present invention;

[0045] Figure 2 This is a schematic diagram illustrating a scenario in which the first ONU and the second ONU communicate in a local area network based on frequency division multiplexing in one embodiment of the local area network communication method in the optical access network of the present invention.

[0046] Figure 3 This is a schematic diagram illustrating a scenario in which the first ONU and the second ONU communicate in a local area network based on time-division multiplexing in one embodiment of the local area network communication method in the optical access network of the present invention.

[0047] Figure 4 This is a flowchart illustrating the second embodiment of the local area network communication method in the optical access network of the present invention;

[0048] Figure 5 This is a schematic diagram of the system architecture of a local area network communication system in an optical access network according to an embodiment of the present invention.

[0049] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0050] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0051] In a first aspect, embodiments of the present invention provide a local area network communication method in an optical access network.

[0052] In one embodiment, reference is made to Figure 1 , Figure 1 This is a flowchart illustrating an embodiment of the local area network communication method in an optical access network according to the present invention. Figure 1 As shown, the local area network communication methods in an optical access network include:

[0053] Step S10: The first ONU receives the target carrier frequency fed back by the OLT based on the local area network communication request sent by the first ONU, and adjusts its local working state to the target carrier frequency.

[0054] In this embodiment, multiple optical network units (ONUs) are connected to the optical line terminal (OLT) in the optical access network. When any one of the ONUs (referred to as the first ONU) needs to communicate with other ONUs via a local area network (LAN), it sends a LAN communication request to the OLT. After receiving the LAN communication request, the OLT feeds back the target carrier frequency to the first ONU. After receiving the target carrier frequency from the OLT, the first ONU adjusts its local operating state to the target carrier frequency.

[0055] Furthermore, in one embodiment, before step S10, the method further includes:

[0056] The OLT receives a local area network (LAN) communication request sent by the first ONU; the OLT detects whether the LAN communication conditions are met; if the LAN communication conditions are met, the OLT selects a carrier frequency from the idle carrier frequencies as the target carrier frequency and feeds the target carrier frequency back to the first ONU.

[0057] In this embodiment, after receiving a local area network (LAN) communication request from the first ONU, the OLT checks whether the LAN communication conditions are currently met. If the conditions are met, it selects a carrier frequency from the idle carrier frequencies as the target carrier frequency and feeds the target carrier frequency back to the first ONU. Conversely, if the LAN communication conditions are not met, the OLT notifies the first ONU that LAN communication is currently not allowed. After receiving this notification, the first ONU waits for a certain period before sending a LAN communication request to the OLT.

[0058] Furthermore, in one embodiment, before the step of the OLT receiving the local area network communication request sent by the first ONU, the method further includes:

[0059] The OLT sends a service activation status detection command to all ONUs connected to it. Upon receiving the command, an ONU with activated LAN communication service sends back identification information indicating that it has activated LAN communication service to the OLT. The OLT then sends identity information to the ONUs that have sent back this information and configures basic service information based on the number of received identification information entries. ONUs with activated LAN interoperability service write the received identity information into their respective EEPROM units and lock the identity information, using it as the basis for determining whether the interoperability service data packet was sent by this ONU.

[0060] In this embodiment, during the initial stage of the local area network (LAN) communication method in the optical access network of the present invention, the OLT sends a service activation status detection command to all ONUs connected to it. Upon receiving the service activation status detection command, ONUs with activated LAN communication services return identification information containing the activated LAN communication service to the OLT; similarly, ONUs without activated LAN communication services return identification information containing the unactivated LAN communication service to the OLT. The OLT then issues identity identification information to the ONUs that have returned identification information containing the activated LAN communication service. It should be noted that the identity identification information issued to different ONUs is different. Basic service information is configured based on the number of received identification information containing the activated LAN communication service, for example, configuring an equal number of carrier frequencies. Furthermore, a set can be established to record the issued identity identification information.

[0061] ONUs that have activated local area communication services will write the received identity information into the EEPROM unit of their respective modules and lock the identity information. Subsequently, when conducting local area network communication, the identity information will be written into the communication service data packets sent by this end, serving as the basis for determining whether the communication service data packets are sent by this ONU.

[0062] Furthermore, in one embodiment, the step of the OLT detecting whether the current local area network communication conditions are met includes:

[0063] The OLT detects whether the number of ONUs that have started local area network (LAN) communication services is greater than a preset threshold. If it is greater than the preset threshold, it determines that the current LAN communication conditions are not met. If it is not greater than the preset threshold, it determines that the current LAN communication conditions are met.

[0064] In this embodiment, the OLT records the number of ONUs that have started local area network (LAN) communication services. By comparing the number of ONUs that have started LAN communication services with a preset threshold, if the number of ONUs that have started LAN communication services is greater than the preset threshold, it is determined that the current LAN communication conditions are not met; conversely, if the number is not greater than the preset threshold, it is determined that the current LAN communication conditions are met.

[0065] Furthermore, in one embodiment, before the step of the OLT detecting whether the local area network communication conditions are currently met, the method further includes:

[0066] The OLT sends a service activation status detection command to all ONUs connected to it. After receiving the service activation status detection command, the ONUs that have activated LAN communication services send back the first LAN interconnection tag to the OLT. After receiving the service activation status detection command, the ONUs that have not activated LAN communication services send back the second LAN interconnection tag to the OLT. The OLT counts the number of first LAN interconnection tags received and uses the number of first LAN interconnection tags as the number of ONUs that have activated LAN communication services.

[0067] In this embodiment, the OLT sends a service activation status detection command to all ONUs connected to it, so that each ONU, upon receiving the command, can send a local area network (LAN) interoperability tag back to the OLT. Specifically, ONUs that have already activated LAN communication services send a first LAN interoperability tag back to the OLT upon receiving the command; ONUs that have not activated LAN communication services send a second LAN interoperability tag back to the OLT. In this way, the OLT can count the number of first LAN interoperability tags among all received LAN interoperability tags and use the number of first LAN interoperability tags as the number of ONUs that have activated LAN communication services.

[0068] Furthermore, at the OLT end, a set 1 can be established for ONUs that have already implemented LAN communication services. Set 1 records the identity information of the ONUs that have implemented LAN communication services. The ONU identity information can be represented using multi-bit binary numbers based on the total number of ONUs that can be connected to the OLT. For example, for a set of ONUs with a total number less than 256, an 8-bit binary number can be used, such as 0x00000001 representing ONU1, 0x00000010 representing ONU2, 0x00000011 representing ONU3, and so on. It should be noted that this is only an illustrative explanation of the ONU identity information; other methods can also be used to represent the ONU identity information.

[0069] At the OLT end, a set 2 can be established for the carrier frequencies allocated to ONUs. Set 2 records the identification information of the carrier frequencies allocated to ONUs. How the identification information of each carrier frequency is represented depends on the actual needs and will not be elaborated here. It should be noted that if ONUs communicate with each other in a local area network using time division multiplexing, the carrier frequencies allocated to ONUs can be the same, therefore, set 2 does not need to be established. If ONUs communicate with each other in a local area network using frequency division multiplexing, then set 2 can be established.

[0070] Step S20: The first ONU sends a local area network communication request and the target carrier frequency to the second ONU;

[0071] In this embodiment, the second ONU is the ONU with which the first ONU wants to conduct local area network communication. In this case, the first ONU sends a local area network communication request and a target carrier frequency to the second ONU.

[0072] Step S30: The second ONU adjusts its local operating state to the target carrier frequency and sends back the agreed communication information to the first ONU;

[0073] In this embodiment, the second ONU determines whether it can communicate with the first ONU via the local area network based on its own service status. If it can, it adjusts its local operating state to the target carrier frequency and then sends a communication consent message to the first ONU. If it cannot, it sends a communication rejection message to the first ONU. After receiving the communication rejection message from the second ONU, the first ONU waits for a preset time and then executes step S20 again.

[0074] In step S40, the first ONU and the second ONU communicate via local area network.

[0075] In this embodiment, after the above steps, both the first ONU and the second ONU adjust their local operating states to the target carrier frequency, so the first ONU and the second ONU can communicate over a local area network.

[0076] In this embodiment, the first ONU receives the target carrier frequency fed back by the OLT based on the LAN communication request sent by the first ONU, and adjusts its local operating state to the target carrier frequency; the first ONU sends the LAN communication request and the target carrier frequency to the second ONU; the second ONU adjusts its local operating state to the target carrier frequency and feeds back the agreed communication information to the first ONU; the first ONU and the second ONU then conduct LAN communication. This embodiment proposes a data transmission mechanism for LAN communication between any two ONUs under the same optical access network, further effectively solving the problem of how to accurately send and receive local interoperability optical signal messages between any two ONUs under the same optical access network at the signal transmission mechanism and standard level, thus further solidifying the foundation for LAN interoperability between any two ONU terminal optical modem users under the same optical access network.

[0077] Furthermore, in one embodiment, after step S40, the method further includes:

[0078] The OLT receives the local area network communication termination signal sent by the first ONU and sets the target carrier frequency to an idle state.

[0079] In this embodiment, after the OLT receives the LAN communication termination signal sent by the first ONU, it can set the target carrier frequency to an idle state. Simultaneously, the number of ONUs already engaged in LAN communication services can be updated, for example, by decrementing the number of ONUs already engaged in LAN communication services by two.

[0080] Further, in one embodiment, step S40 includes:

[0081] The first ONU and the second ONU communicate on a local area network using either frequency division multiplexing or time division multiplexing.

[0082] In this embodiment, the first ONU and the second ONU can communicate in a local area network using either frequency division multiplexing or time division multiplexing.

[0083] Furthermore, in one embodiment, when the first ONU and the second ONU communicate in a local area network based on frequency division multiplexing, the transmitting side modulates the interoperability service data packets onto the target carrier frequency through a modulator, converts them into modulated signals, and outputs them to the burst optical transmitting component on the transmitting side. The burst optical transmitting component converts the modulated signals into optical signals and outputs them to the burst optical receiving component on the receiving side. The burst optical receiving component converts the received optical signals into electrical signals and outputs the electrical signals to the modulator on the receiving side. The modulator modulates the interoperability service data packets according to the target carrier frequency and the electrical signals.

[0084] In this embodiment, refer to Figure 2 , Figure 2 This is a schematic diagram illustrating a scenario in which the first ONU and the second ONU communicate in a local area network (LAN) based on frequency division multiplexing (FDM) in one embodiment of the LAN communication method in the optical access network of the present invention. Figure 2 As shown, when the first ONU and the second ONU communicate in a local area network using frequency division multiplexing (FDM), the transmitting side modulates the interoperability service data packets onto the target carrier frequency using a modulator, converting them into modulated signals, and outputting them to the burst optical transmitting component on the transmitting side. The burst optical transmitting component then converts the modulated signals into optical signals and outputs them to the burst optical receiving component on the receiving side. The burst optical receiving component converts the received optical signals into electrical signals and outputs the electrical signals to the modulator on the receiving side. The modulator modulates the interoperability service data packets according to the target carrier frequency and the electrical signals. It is easy to understand that when the transmitting side is the first ONU, the receiving side is the second ONU; similarly, when the transmitting side is the second ONU, the receiving side is the first ONU.

[0085] Furthermore, in one embodiment, when the first ONU and the second ONU communicate in a local area network based on time-division multiplexing, they transmit interoperability service data packets according to a preset time interval. The interoperability service data packets include a clock data recovery preamble, interoperability service data packet sending side identification information, interoperability service tag, and interoperability service data. In a single communication process, the last transmitted interoperability service data packet also includes an end tag.

[0086] In this embodiment, refer to Figure 3 , Figure 3 This is a schematic diagram illustrating a scenario in which the first ONU and the second ONU communicate in a local area network (LAN) based on time-division multiplexing, according to one embodiment of the LAN communication method in the optical access network of the present invention. Figure 3 As shown, transmitting interoperable service data packets according to a preset time interval can avoid mutual interference between the two interoperable service data packets during transmission. This interference is mainly caused by phenomena such as sudden shutdown and trailing of optical devices or optical modules.

[0087] The clock data recovery preamble is used by the ONU receiving the interoperability service data packet to recover the clock signal normally and to recover the interoperability service data packet based on this clock.

[0088] The sending side identification information, i.e. the unique digital number of the sending side, can be represented by an 8-bit binary number for the ONUs in a set of ONUs with a total number of less than 256. For example, 0x00000001 represents ONU1, 0x00000010 represents ONU2, 0x00000011 represents ONU3, and so on.

[0089] Interoperability service tag is used to identify whether the sending side is in the state of carrying out local area network (LAN) interoperability services. For example, the interoperability service tag can be represented by 1 bit of binary data, where 1 indicates that this ONU has carried out LAN communication services, and 0 indicates that this ONU has not carried out LAN communication services.

[0090] Interoperable business data refers to data that needs to be transmitted within a local area.

[0091] The end-of-data tag is used to indicate whether the current local area network (LAN) communication service data transmission has ended. It can be represented by a binary data string of a specific length that will not appear in the interoperability service data. For example, a specified 16-bit binary data, such as 0x1101110111011101, indicates that the current LAN communication service data transmission has ended. This end-of-data tag must be placed at the end of the interoperability service data packet.

[0092] Furthermore, in one embodiment, reference is made to Figure 4 , Figure 4 This is a flowchart illustrating the second embodiment of the local area network communication method in the optical access network of the present invention. Figure 4 As shown:

[0093] Step 1: The OLT detects which of the connected ONUs have enabled LAN communication services and assigns identity information to the ONUs that have enabled LAN communication services. Then, it detects which ONUs have actually started LAN communication services and establishes Set 1, which records the identity information of the ONUs that have started LAN communication services. Set 2 is also established, which records the identification information of the assigned carrier frequencies.

[0094] Step 2: The first ONU sends a local area network communication request to the OLT, where the first ONU is any one of the ONUs that has enabled local area network communication service;

[0095] Step 3: The first ONU receives the target carrier frequency fed back by the OLT based on the local area network communication request sent by the first ONU, and adjusts its local working state to the target carrier frequency;

[0096] Step 4: The first ONU sends a local area network communication request and the target carrier frequency to the second ONU;

[0097] Step 5: The second ONU adjusts its local operating state to the target carrier frequency and sends the agreed communication information back to the first ONU;

[0098] Step 6: The first ONU and the second ONU establish local area network communication;

[0099] Step 7: After the local communication between the first ONU and the second ONU ends, the OLT updates set 1 and set 2. For example, after the local communication between the first ONU and the second ONU ends, the OLT does not record the identification information of the first ONU and the second ONU in set 1, nor does it record the identification information of the target carrier frequency in set 2, and returns to step 2 when a new local area network communication request is initiated by the first ONU.

[0100] Secondly, embodiments of the present invention also provide a local area network communication system in an optical access network.

[0101] In one embodiment, reference is made to Figure 5 , Figure 5 This is a schematic diagram of the system architecture of a local area network communication system in an optical access network according to an embodiment of the present invention. Figure 5 As shown, the local area network communication system in the optical access network includes:

[0102] OLT, used to feed back the target carrier frequency to the first ONU based on the local area network communication request sent by the first ONU;

[0103] The first ONU is used to receive the target carrier frequency, adjust its local operating state to the target carrier frequency, and send a local area network communication request and the target carrier frequency to the second ONU.

[0104] The second ONU is used to adjust the local operating state to the target carrier frequency and to send the agreed communication information back to the first ONU.

[0105] The first ONU and the second ONU are used for local area network communication.

[0106] In this embodiment, Figure 4 Although only the first ONU and the second ONU are shown, it is easy to understand that there are multiple ONUs connected to the OLT. Any ONU that sends a local area network communication request to the OLT can be called the first ONU. The second ONU is the ONU with which the first ONU needs to communicate on the local area network. The second ONU is one of the multiple ONUs connected to the OLT.

[0107] Furthermore, in one embodiment, the OLT is used for:

[0108] Receive the local area network communication request sent by the first ONU;

[0109] Check if the current local area network communication conditions are met;

[0110] If the local area network communication conditions are met, a carrier frequency is selected from the idle carrier frequencies as the target carrier frequency, and the target carrier frequency is fed back to the first ONU.

[0111] Furthermore, in one embodiment, the OLT is used for:

[0112] Send a service activation status detection command to all ONUs connected to this terminal;

[0113] The ONU that has activated local area network communication services is used to send back identification information containing the activated local area network communication services to the OLT after receiving the service activation status detection command;

[0114] The OLT is used to send identity information to the ONU that provides feedback containing identification information of activated LAN communication services, and to configure basic service information based on the number of identification information containing activated LAN communication services received.

[0115] ONUs that have enabled local area interoperability services write the received identity information into the EEPROM unit of their respective modules and lock the identity information. The identity information is used as the basis for determining whether the interoperability service data packet is sent by this ONU.

[0116] Furthermore, in one embodiment, the OLT is used for:

[0117] Check whether the number of ONUs that have started local area network communication services exceeds a preset threshold;

[0118] If the value exceeds the preset threshold, it is determined that the current conditions for local area network communication are not met.

[0119] If the value is not greater than the preset threshold, then the local area network communication conditions are determined to be met.

[0120] Furthermore, in one embodiment, the OLT is used for:

[0121] Send status detection commands to all ONUs connected to this terminal;

[0122] The various ONUs connected to the OLT are used for:

[0123] After receiving the service activation status detection command, the ONU that has already started local area network communication services sends the first local area interconnection tag back to the OLT;

[0124] After receiving the service activation status detection command, the ONU that has not yet started local area network communication services sends a second local area interconnection tag to the OLT;

[0125] The OLT is used to count the number of first local area communication tags received, and the number of first local area communication tags is used as the number of ONUs that have carried out local area network communication services.

[0126] Furthermore, in one embodiment, the OLT is used for:

[0127] Upon receiving the local area network communication termination signal sent by the first ONU, the target carrier frequency is set to an idle state.

[0128] Furthermore, in one embodiment, the first ONU and the second ONU communicate in a local area network based on frequency division multiplexing or time division multiplexing.

[0129] Furthermore, in one embodiment, when the first ONU and the second ONU communicate in a local area network based on frequency division multiplexing, the transmitting side modulates the interoperability service data packets onto the target carrier frequency through a modulator, converts them into a modulated signal, and outputs it to the burst optical transmitting component of the transmitting side. The burst optical transmitting component then converts the modulated signal into an optical signal and outputs it to the burst optical receiving component of the receiving side.

[0130] The burst optical receiving component converts the received optical signal into an electrical signal and outputs the electrical signal to the modem on the receiving side. The modem modulates the data to obtain the interoperable service data packet according to the target carrier frequency and the electrical signal.

[0131] Furthermore, in one embodiment, when the first ONU and the second ONU communicate in a local area network based on time-division multiplexing, they transmit interoperability service data packets according to a preset time interval. The interoperability service data packets include a clock data recovery preamble, interoperability service data packet sending side identification information, interoperability service tag, and interoperability service data. In a single communication process, the last transmitted interoperability service data packet also includes an end tag.

[0132] The specific embodiments of the local area network communication system in the optical access network are basically the same as the various embodiments of the local area network communication method in the optical access network, and will not be described in detail here.

[0133] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0134] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0135] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of the present invention.

[0136] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A local area network communication method in an optical access network, characterized in that, The local area network communication method in the optical access network includes: The OLT receives a local area network communication request sent by the first ONU; The OLT detects whether the number of ONUs that have carried out local area network communication services exceeds a preset threshold. If the value exceeds the preset threshold, it is determined that the current conditions for local area network communication are not met. If the value is not greater than the preset threshold, then the local area network communication conditions are met. If the local area network communication conditions are met, the OLT selects a carrier frequency from the carrier frequencies that are in an idle state as the target carrier frequency and feeds the target carrier frequency back to the first ONU. The first ONU receives the target carrier frequency fed back by the OLT based on the local area network communication request sent by the first ONU, and adjusts its local working state to the target carrier frequency; The first ONU sends a local area network communication request and the target carrier frequency to the second ONU; The second ONU adjusts its local operating state to the target carrier frequency and sends the agreed communication information back to the first ONU. The first ONU communicates with the second ONU via a local area network. The OLT receives the LAN communication termination signal sent by the first ONU, sets the target carrier frequency to an idle state, and decrements the number of ONUs that have started LAN communication services by two.

2. The local area network communication method in an optical access network as described in claim 1, characterized in that, Before the step of the OLT receiving the local area network communication request sent by the first ONU, the method further includes: The OLT sends a service activation status detection command to all ONUs connected to this terminal; After receiving the service activation status detection command, the ONU that has activated the local area network communication service sends back identification information containing the activated local area network communication service to the OLT. The OLT sends identity information to the ONU containing the identification information of the activated LAN communication service, and configures the basic service information according to the number of identification information containing the activated LAN communication service received. ONUs that have activated local area interoperability services will write the received identity information into the EEPROM unit of their respective modules and lock the identity information, using the identity information as the basis for determining whether the interoperability service data packet is sent by this ONU.

3. The local area network communication method in an optical access network as described in claim 1, characterized in that, Before the step of the OLT detecting whether the local area network communication conditions are met, the following is also included: The OLT sends a service execution status detection command to all ONUs connected to this terminal; After receiving the service activation status detection command, the ONU that has already started local area network communication services sends the first local area interconnection tag back to the OLT; After receiving the service activation status detection command, the ONU that has not yet started local area network communication services sends a second local area interconnection tag to the OLT; The OLT counts the number of first local area communication tags received and uses the number of first local area communication tags as the number of ONUs that have carried out local area network communication services.

4. The local area network communication method in an optical access network as described in any one of claims 1 to 3, characterized in that, The steps for the first ONU and the second ONU to communicate over a local area network include: The first ONU and the second ONU communicate on a local area network using either frequency division multiplexing or time division multiplexing.

5. The local area network communication method in an optical access network as described in claim 4, characterized in that: When the first ONU and the second ONU communicate in a local area network based on frequency division multiplexing, the transmitting side modulates the interoperability service data packets onto the target carrier frequency through a modulator, converts them into modulated signals, and outputs them to the burst optical transmitting component on the transmitting side. The burst optical transmitting component then converts the modulated signals into optical signals and outputs them to the burst optical receiving component on the receiving side. The burst optical receiving component converts the received optical signal into an electrical signal and outputs the electrical signal to the modem on the receiving side. The modem modulates the data to obtain the interoperable service data packet according to the target carrier frequency and the electrical signal.

6. The local area network communication method in an optical access network as described in claim 5, characterized in that: When the first ONU and the second ONU communicate in a local area network using time-division multiplexing, they transmit interoperability service data packets at preset time intervals. The interoperability service data packets include a clock data recovery preamble, interoperability service data packet sending side identification information, interoperability service tags, and interoperability service data. In a single communication process, the last transmitted interoperability service data packet also includes an end tag.

7. A local area network communication system in an optical access network, characterized in that, The local area network communication system in the optical access network includes: The OLT is used to receive local area network communication requests sent by the first ONU; detect whether the number of ONUs that have started local area network communication services is greater than a preset threshold; if it is greater than the preset threshold, it is determined that the current local area network communication conditions are not met; if it is not greater than the preset threshold, it is determined that the current local area network communication conditions are met; if the current local area network communication conditions are met, a carrier frequency is selected from the carrier frequencies in the idle state as the target carrier frequency, and the target carrier frequency is fed back to the first ONU. The first ONU is used to receive the target carrier frequency, adjust its local operating state to the target carrier frequency, and send a local area network communication request and the target carrier frequency to the second ONU. The second ONU is used to adjust the local operating state to the target carrier frequency and to send the agreed communication information back to the first ONU. The first ONU and the second ONU are used for local area network communication; The OLT is also used to receive the local area network communication termination signal sent by the first ONU, set the state of the target carrier frequency to idle state, and decrement the number of ONUs that have started local area network communication services by two.

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