CN114979838A

CN114979838A - Communication method, optical network unit, optical line terminal and optical communication system

Info

Publication number: CN114979838A
Application number: CN202110213039.1A
Authority: CN
Inventors: 张伦; 张军; 林华枫
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2022-08-30

Abstract

A communication method, an optical network unit, an optical line terminal and an optical communication system relate to the technical field of communication. In the method, an Optical Network Unit (ONU) sends first request information to an Optical Line Terminal (OLT), wherein the first request information is used for requesting the OLT to configure a first bandwidth for the ONU, and the first bandwidth is used for the ONU to communicate with other ONUs; receiving first authorization information from the OLT, wherein the first authorization information is used for indicating the first bandwidth; communicating with the other ONUs based on the first bandwidth. The scheme is beneficial to realizing the flow scheduling of the ONU and avoiding the flow bypass, thereby expanding the application scene of the PON system.

Description

Communication method, optical network unit, optical line terminal and optical communication system

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method, an optical network unit, an optical line terminal, and an optical communication system.

Background

With the rapid development of optical communication technology, Passive Optical Network (PON) systems are increasingly applied in optical communication technology. The PON system includes an Optical Line Terminal (OLT) and a plurality of Optical Network Units (ONUs), and the OLT communicates with the ONUs. The OLT adopts a Dynamic Bandwidth Allocation (DBA) mechanism, and dynamically adjusts and allocates the uplink bandwidth to each ONU according to the uplink burst traffic demand of each ONU, thereby not only meeting the uplink bandwidth demand of each ONU, but also improving the utilization rate of the PON system bandwidth.

At present, the PON system and the above-mentioned DBA mechanism adopted by the PON system are suitable for a home bandwidth scenario mainly involving communication between the ONUs and the OLT (referred to as north-south traffic), and for a scenario mainly involving internal horizontal communication between different ONUs (referred to as east-west traffic) such as an office, a library, and a conference room, and in order to avoid traffic detour and bandwidth bottleneck, ethernet networking is preferably adopted. At this time, if the PON system is still expected to be applied to these scenarios, it is necessary to perform traffic scheduling on internal horizontal communication between different ONUs to avoid the problem of time delay caused by traffic detour and other factors, and there is no solution for how to perform traffic scheduling between different ONUs.

Disclosure of Invention

The embodiment of the application provides a communication method, an optical network unit, an optical line terminal and an optical communication system, which are beneficial to realizing traffic scheduling on an ONU (optical network unit), and avoiding traffic detour, thereby expanding the application scene of the PON system.

In a first aspect, an embodiment of the present application provides a communication method, where the method may be applied to an optical network unit ONU, where the ONU may be any one of optical communication systems.

In the method, an ONU sends first request information to an Optical Line Terminal (OLT), wherein the first request information is used for requesting the OLT to configure a first bandwidth for the ONU, and the first bandwidth is used for the ONU to communicate with other ONUs; receiving first authorization information from the OLT, wherein the first authorization information is used for indicating the first bandwidth; communicating with the other ONUs based on the first bandwidth.

By the scheme, the ONU can request the OLT to allocate the bandwidth to the ONU by sending the first request information to the OLT, so that the ONU can communicate with other ONUs according to the first bandwidth allocated by the OLT, the problems of time delay and optical signal loss caused by traffic detour are avoided, and the communication scheme is suitable for replacing Ethernet networking and is applied to scenes such as offices, libraries, conference rooms and the like which mainly adopt internal transverse communication (called as east-west traffic) among different ONUs, thereby expanding the application scene of the PON system.

In one possible design, the sending the first request information to the optical line termination OLT may include: sending the first request message to the OLT through an uplink channel between the ONU and the OLT; receiving first authorization information from the OLT, including: and receiving first authorization information from the OLT through a downlink channel between the ONU and the OLT. By the scheme, the ONU can transmit the relevant request information and the corresponding authorization information required for carrying out traffic scheduling with the OLT by virtue of the communication channel (comprising the uplink channel and the downlink channel) between the ONU and the OLT, so that the ONU is convenient to communicate with other ONUs based on the bandwidth indicated by the authorization information by the OLT.

In practical applications, the first request information and the first authorization information interacted between the ONU1 and the OLT may include various messages interacted between the two parties, and when the ONU1 and the OLT are applied to different optical communication systems, the messages carrying the first request information and/or the first authorization information may also have different names.

Illustratively, the first request information is contained in an uplink dynamic bandwidth report DBRu; and/or, the first authorization information is contained in a bandwidth map BWmap message; or, the first request message is contained in an uplink REPORT message; and/or, the first authorization information is contained in a downlink GATE message.

Illustratively, the DBRu includes a first Allocation field in a set upstream frame; the uplink frame further includes a second Allocation field, where the second Allocation field is used to carry second request information, the second request information is used to request the OLT to configure a second bandwidth for the ONU, and the second bandwidth is used for the ONU to communicate with the OLT.

For example, the first request message includes the first MAC address, which is used by the ONU to communicate with the other ONU; sending first request information to the OLT, wherein the first request information comprises: packaging the first request information based on a set packaging protocol to obtain a first data packet; sending the first data packet to the OLT; wherein the first authorization information is encapsulated in a second packet obtained based on the encapsulation protocol, the first authorization information including the first MAC address.

Illustratively, the first request message is included in an uplink physical layer operation management and maintenance PLOAMu message; and/or, the first authorization information is contained in a downlink physical layer operation management and maintenance PLOAMd message; or, the first request information is contained in an uplink MPCP message; and/or the first authorization information is contained in a downlink MPCP message.

Illustratively, the first request message is included in an upstream ONU management and control interface OMCI message; and/or, the first authorization information is contained in a downstream ONU management and control interface OMCI message; or, the first request information is included in an uplink operation management and maintenance OAmu message; and/or the first authorization information is contained in a downlink operation management and maintenance OAMd message.

In one possible design, before the ONU sends the first request information to the OLT, the method further comprises sending capability information to the OLT; the capability information is used for indicating that the ONU has a first capability of communicating with other ONUs and a communication channel type corresponding to the first capability; receiving configuration information from the OLT; the configuration information is configured by the OLT according to the capability information, and the configuration information includes information for instructing the ONU to enable the first capability, an Alloc ID used by the ONU to communicate with the other ONU, and a first traffic scheduling policy, where the first traffic scheduling policy is used to instruct a message for carrying the first request information and the first authorization information.

By the scheme, the ONU can perform capability negotiation with the OLT and determine the scheduling strategy of the east-west flow of the ONU, so that the ONU can subsequently request bandwidth allocation to the OLT based on the flow scheduling strategy, the bandwidth requirement of the ONU for communicating with other ONUs can be met, and the utilization rate of the PON system bandwidth can be improved.

In one possible design, the Alloc IDs used by the ONU to communicate with the other ONUs are within a first interval, the Alloc IDs used by the ONU to communicate with the OLT are within a second interval, and the first interval is different from the second interval.

By the scheme, the OLT can respectively allocate the Alloc IDs for the ONUs in two different intervals to realize different communication functions, so that the ONUs can realize communication with the OLT or other ONUs based on the allocated corresponding Alloc IDs, and no conflict is generated.

In one possible design, the ONU and the OLT belong to the same optical communication system, and the optical communication system is any one of the following: gigabit passive optical network GPON systems; an Ethernet Passive Optical Network (EPON) system; a 10gigabit Ethernet passive optical network 10G-EPON system; a TWDM-PON system of a time division and wavelength division multiplexing passive optical network; a 10gigabit passive optical network XG-PON system; a10 gigabit symmetric passive optical network XGS-PON system.

In a second aspect, an embodiment of the present application provides a communication method, which may be applied to an optical line terminal OLT in an optical communication system, where: the OLT receives first request information from an optical network unit ONU; configuring a first bandwidth for the ONU according to the first request information, wherein the first bandwidth is used for the ONU to communicate with other ONUs; sending first authorization information to the ONU, wherein the first authorization information is used for indicating the first bandwidth so that the ONU can communicate with other ONUs based on the first bandwidth.

In one possible design, the OLT receives first request information from an optical network unit ONU, and includes: receiving the first request information from the ONU through an upstream channel between the OLT and the ONU; sending first authorization information to the ONU, including: and sending the first authorization information to the ONU through a downlink channel between the OLT and the ONU.

Illustratively, the first request information is contained in an uplink dynamic bandwidth report DBRu; and/or, the first authorization information is contained in a bandwidth map BWmap message; or, the first request message is contained in an uplink REPORT message; and/or the first authorization information is contained in a downstream GATE message.

By way of example, the DBRu includes a first Allocation field in a set upstream frame; the uplink frame further includes a second Allocation field, where the second field Allocation is used to carry second request information, the second request information is used to request the OLT to configure a second bandwidth for the ONU, and the second bandwidth is used for the ONU to communicate with the OLT.

Illustratively, the first request message is encapsulated in a first data packet obtained based on a set encapsulation protocol, and the first request message includes a first MAC address, and the first MAC address is used for the ONU to communicate with the other ONUs; the first authorization information comprises the first MAC address; sending first authorization information to the ONU, including: packaging the first authorization information based on the packaging protocol to obtain a second data packet; and sending the second data packet to the ONU.

Illustratively, the first request message is included in an upstream ONU management and control interface OMCI message; and/or, the first authorization information is contained in a downstream ONU management and control interface OMCI message; or, the first request information is included in an upstream operation management and maintenance OAmu message; and/or the first authorization information is contained in a downlink operation management and maintenance OAMd message.

In one possible design, before receiving the first request message from the ONU, the method further comprises: receiving capability information from the ONU; the capability information is used for indicating that the ONU has a first capability of communicating with other ONUs and a communication channel type corresponding to the first capability; configuring according to the capability information and sending configuration information to the ONU; the configuration information includes information for instructing the ONU to enable the first capability, an Alloc ID used by the ONU to communicate with the other ONU, and a first traffic scheduling policy, where the first traffic scheduling policy is used to instruct a message carrying the first request information and the first authorization information.

In one possible design, the OLT and the ONU belong to the same optical communication system, and the optical communication system is any one of the following: gigabit passive optical network GPON systems; an Ethernet Passive Optical Network (EPON) system; a 10gigabit Ethernet passive optical network 10G-EPON system; a TWDM-PON system of a time division and wavelength division multiplexing passive optical network; a 10gigabit passive optical network XG-PON system; a10 gigabit symmetric passive optical network XGS-PON system.

In a third aspect, an embodiment of the present application provides an optical network unit ONU, including a transceiver and a controller; the transceiver is used for communicating with other equipment; the controller is configured to invoke program instructions to implement the method according to any one of the first aspect. Wherein the apparatus may further comprise a memory storing program instructions invoked by the controller.

In a fourth aspect, an embodiment of the present application provides an optical line terminal OLT, including a transceiver and a controller; the transceiver is used for communicating with other equipment; the controller is configured to call a program instruction to implement the method according to any one of the second aspects. Wherein the apparatus may further comprise a memory storing program instructions invoked by the controller.

In a fifth aspect, an embodiment of the present application provides an optical communication system, which includes at least two optical network units ONU according to the third aspect and an optical line terminal OLT according to the fourth aspect.

The optical communication system of an example is any one of: gigabit passive optical network GPON systems; an Ethernet Passive Optical Network (EPON) system; a 10gigabit Ethernet passive optical network 10G-EPON system; a TWDM-PON system of a time division and wavelength division multiplexing passive optical network; a 10gigabit passive optical network XG-PON system; a10 gigabit symmetric passive optical network XGS-PON system.

In a sixth aspect, embodiments of the present application provide a computer-readable medium for storing computer instructions, which, when executed by a computer, cause the method of any one of the first or second aspects to be performed.

The present application may be further combined to provide further implementations on the basis of the implementations provided by the above aspects.

Drawings

FIG. 1 is a schematic diagram of the DBA mechanism;

fig. 2 is a schematic diagram of signal transmission when a source ONU communicates with an OLT and a destination ONU;

fig. 3 is a schematic diagram of an optical communication system to which an embodiment of the present application is applicable;

fig. 4 is a schematic diagram of an optical communication system according to an embodiment of the present application;

fig. 5 is a flowchart illustrating a communication method according to an embodiment of the present application;

fig. 6 is a schematic flowchart of ONU registration and capability negotiation according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of an uplink frame carrying first request information according to an embodiment of the present application;

FIG. 8 is a schematic diagram of an apparatus according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of an apparatus according to an embodiment of the present disclosure.

Detailed Description

Fig. 1 is a schematic diagram of the DBA mechanism. Referring to fig. 1, in the PON system, data statistics is periodically performed inside an ONU, and DBA report information is reported to an OLT based on a bandwidth request reporting period Tr; the OLT comprises a DBA module configured with DBA algorithm logic, the DBA module continuously collects DBA report information from each ONU based on a bandwidth calculation period Tc, calculates the DBA report information through a DBA algorithm, and then issues a calculation result to each ONU in a bandwidth Map (BW Map) mode based on a bandwidth allocation period Ta; each ONU sends uplink burst (burst) data in an allowed time slot according to the BW Map information, and occupies an uplink bandwidth.

When communication between an ONU and an OLT, and communication between different ONUs are involved in a PON system, an upstream signal sent by a source ONU to the OLT includes a signal for transmission between the source ONU and the OLT (i.e. north-south traffic), and a signal for transmission between the source ONU and another ONU (i.e. east-west traffic), wherein a transmission path of the upstream signal is shown as a line 1 in fig. 2. The signal transmitted from the source ONU to the OLT may be processed by the OLT after reaching the OLT. For a signal sent by a source ONU to another ONU (i.e. a destination ONU), after the signal reaches the OLT in an upstream manner, the OLT performs the following two methods: after the switching is realized, the OLT sends the data downstream to the destination ONU, as shown by line 2 in fig. 2:

(1) the mesh is exchanged through an OLT main control board; (2) two layers of PON interface boards of the OLT are communicated;

compared with a transmission path through which a signal directly reaches the destination ONU after being sent from the source ONU, the transmission path can cause traffic detour, and the traffic detour can introduce a large time delay, the method includes: time delay of uplink and downlink paths of the trunk optical fiber; the forwarding delay inside the OLT, etc. Further, when devices such as an optical splitter and a total reflector are provided in the upstream and downstream paths of the trunk optical fiber, a significant signal loss is also caused. Thus, when the PON system is applied to a scenario such as an office, a library, a conference room, etc. where internal horizontal communication between different ONUs is dominant, the problems of delay and loss are particularly prominent, making the PON system unsuitable for being applied to these scenarios instead of conventional ethernet networking.

In view of this, the embodiment of the present application provides a communication scheme, which is helpful for implementing traffic scheduling on an ONU, and avoiding traffic detour, thereby expanding an application scenario of a PON system. The method and the device are based on the same technical conception, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

The communication scheme of the present application is described below with reference to the drawings and embodiments.

The embodiment of the application can be applied to an optical communication system, and the optical communication system can be a PON system. The PON system may be a gigabit-passive optical network (GPON) system, an Ethernet Passive Optical Network (EPON) system, a 10gigabit ethernet passive optical network (10 Gb/10G-EPON) system, a time and wavelength division multiplexing passive optical network (dm-PON), a 10 gigabit-passive optical network (10 gigabit-passive optical network, XG-PON) system, or a 10 gigabit-symmetric passive optical network (10-gigabit-passive optical network, XGs-PON) system. The new technology of future evolution will increase the speed of PON to 25Gbps, 50Gbps and even 100Gbps, so the present application can also apply the PON system with higher transmission speed, which is not limited in the present application.

The optical communication system includes at least an OLT and at least two ONUs (or Optical Network Terminals (ONTs)), and the OLT communicates with the at least two ONUs, respectively. The OLT and the ONU can be connected through optical passive devices such as optical fibers, optical splitters (splitters) and full reflectors, and do not need to rent a machine room and be provided with a power supply. Therefore, the optical communication system is a passive optical network.

Illustratively, referring to fig. 3, the OLT communicates with n ONUs via a full reflector, splitter. In fig. 3, n ONUs are ONU1, ONU2, … …, and ONUn, respectively, and n is an integer greater than or equal to 2. The splitter may also be referred to as an optical splitter. Splitter may be a fiber optic junction device having multiple inputs and multiple outputs for coupling, branching, and distribution of optical signals. The transmission path section between the OLT and Splitter may be a Feeder section (Feeder), that is, the OLT and Splitter are connected by a trunk fiber. The transmission path section between the Splitter and the ONU may be a Drop section (Drop), that is, the Splitter and the ONU are connected by a branch optical fiber. A total reflector may be located between the OLT and the Splitter for totally reflecting optical signals of a set wavelength, for example, optical signals other than the optical signals transmitted through the trunk fiber (including optical signals used for communication between different ONUs), so as to avoid traffic detour.

It should be understood that, in the embodiment of the present application, the transmission direction of the data or the optical signal carrying the data from the OLT to the ONU/ONT is referred to as the downstream direction. The transmission direction of data or data carrying optical signals from the ONU/ONTs to the OLT is called upstream direction. The OLT may transmit data or optical signals to the ONUs (downstream direction), and the ONUs may transmit data or optical signals to the OLT (upstream direction) in a unicast manner. When data or optical signals carrying data are transmitted transversely between two ONUs, the data or optical signals carrying data are transmitted in a unicast mode between a source ONU and a destination ONU.

In the embodiment of the present application, in order to avoid that east and west traffic bypasses and thus extend an application scenario of the PON system, one possible way is to provide two Media Access Control (MAC) modules (for convenience of distinction, these two MAC modules are respectively referred to as a MAC1 module and a MAC2 module) in a controller of any one ONU shown in fig. 3, and a transceiver (including a transmitter and a receiver) corresponding to each MAC module. The MAC1 module communicates with the OLT through the corresponding Transmitter (TX)1 and Receiver (RX)1, respectively, and the MAC2 module communicates with the receivers 2 and transmitters 2 of other ONUs through the corresponding transmitters 2 and receivers 2.

Fig. 4 shows an example where n is 2 ONUs and 2 ONUs are ONU1 and ONU2 in the optical communication system, where as shown in fig. 4, the controller of ONU1/ONU2 includes MAC1 module and MAC2 module, and a transmitter 1 and a receiver 1 corresponding to the MAC1 module, and a transmitter 2 and a receiver 2 corresponding to the MAC2 module, where the OLT includes the receiver 1 and the transmitter 1 corresponding to the transmitter 1 and the receiver 1 of any ONU, respectively, the Wavelength corresponding to the transmitter 1 is λ 1, the Wavelength corresponding to the receiver 1 is λ 2, the wavelengths corresponding to the transmitter 2 and the receiver 2 are λ 3, and the values of λ 1, λ 2, and λ 3 are different, and a Wavelength Division Multiplexer (WDM) can combine optical carrier signals of two or more different wavelengths together, and coupled to the same optical fiber for transmission in the optical line, the total reflector may be arranged for totally reflecting the optical signal with wavelength lambda 3. For upstream transmission, the transmitter 1 of ONU1/ONU2 is configured to transmit an upstream optical signal with a wavelength λ 1 to the receiver 1 of the OLT, and the receiver 1 of the OLT is configured to receive an upstream optical signal with a wavelength λ 1 from ONU1/ONU 2. For downstream transmission, the transmitter 1 of the OLT is configured to transmit a downstream optical signal with a wavelength λ 2, and the receiver 1 of the ONU1/ONU2 is configured to receive a downstream optical signal with a wavelength λ 2. When ONU1/ONU2 is the source ONU, ONU1/ONU2 transmits the optical signal having the wavelength λ 3 by its own transmitter 2, and the optical signal having the wavelength λ 3 is transmitted by the full reflector and received by receiver 2 of ONU2/ONU1 which is the destination ONU.

It should be understood that fig. 3 and 4 are only examples and not limitations of the optical communication system to which the embodiments of the present application are applicable, and in some embodiments, the optical communication system or the OLT or the ONU in the optical communication system may include any module or device for implementing communication with other devices, which is not limited in this application.

According to the optical communication related standard protocol, the ONUs are identified by ONU-IDs, one ONU may include a plurality of transmission containers (T-CONT), the upstream bandwidth is divided based on the T-CONT, each T-CONT is uniquely identified by an allocation identifier (Alloc ID), the OLT may allocate Alloc IDs to the ONUs according to a preset range of values of the Alloc IDs, and different services use different T-CONT.

Therefore, in this embodiment of the present application, to avoid traffic detour and avoid collision at the same time, any one of the n ONUs shown in fig. 3 may perform capability negotiation with the OLT, so as to notify the OLT of at least one communication capability supported by itself, and negotiate a traffic scheduling mechanism with the LOT. For example, the at least one communication capability may include, for example, a capability for communication between the ONU and other ONUs. The OLT may configure the ONU according to at least one communication capability of the ONU, and issue related configuration information to the ONU to instruct the ONU to enable a corresponding communication capability, and an Alloc ID and a related traffic scheduling policy used by the ONU to communicate with the other ONUs, so as to complete capability negotiation. During the operation of the ONU and the communication with other devices (including the OLT and/or other ONUs), the OLT may perform traffic scheduling on the ONU according to the communication capability and/or the service data of the ONU, so as to implement the communication between the ONU and the OLT or other ONUs.

In order to implement the capability negotiation mechanism of any ONU and the traffic scheduling mechanism between the OLT and any ONU, a possible manner is that any ONU may transmit capability information and corresponding configuration information required for performing capability negotiation with the OLT through a communication channel (including an uplink channel and/or a downlink channel) between itself and the OLT, or transmit related request information and corresponding authorization information required for performing traffic scheduling with the OLT. The ONU can respectively implement communication with the OLT or other ONUs based on the communication capability supported by the ONU and according to information included in the corresponding configuration information or the corresponding authorization information.

For convenience of understanding, the optical communication system shown in fig. 4 is taken as an example, and the communication method of the present application is described with reference to the drawings and the embodiment. It should be noted that the method flowchart shown in fig. 5 mainly includes a capability negotiation stage and a traffic scheduling stage, and in the capability negotiation stage, only the ONU1 is taken as an example to introduce a process of implementing capability negotiation between any ONU and the OLT, and detailed implementation may refer to the following related description, which will not be described again in detail below. In the traffic scheduling stage, for convenience of distinction, any ONU (for example, ONU1) that transmits an optical signal to another ONU may be referred to as a source ONU, and an ONU (for example, ONU2) that receives an optical signal from the source ONU may be referred to as a destination ONU.

Referring to fig. 5, the communication method may include the steps of:

capability negotiation phase

S501: the ONU1 sends the capability information to the OLT.

In this embodiment, the capability information sent by the ONU1 to the OLT may include one type of capability information, or may include multiple types of capability information, and any type of capability information may be used to indicate one type of communication capability that the ONU1 has (or supports), for example, the capability of communicating with the OLT, the capability of communicating with any other ONU (e.g., ONU2) among the n ONUs, the capability of communicating with a specific ONU among the n ONUs, and the capability of communicating with a third-party device, which is not limited in this application.

S502: the OLT sends configuration information to the ONU1 according to the capability information.

The configuration information may include a related information set obtained by the OLT configuring the ONU according to the capability information.

If the capability information sent by ONU1 to the OLT includes one type of capability information, the configuration information sent by the OLT to ONU1 may include a set of information sets corresponding to the capability information. If the capability information sent by ONU1 to the OLT includes multiple types of capability information, the configuration information sent by the OLT to ONU1 may include multiple sets of information corresponding to the multiple types of capability information, and any set of information may include, for example, information for indicating that ONU1 enables corresponding communication capability and a communication identifier used by ONU1 to enable corresponding communication capability to communicate with other devices, which is not limited in this application.

For example, the capability information sent by the ONU1 to the OLT may include information indicating whether the ONU1 has a first capability of communicating with other ONUs and a communication channel type corresponding to the first capability, and when an ONU has the first capability of communicating with other ONUs, a corresponding information set issued by the OLT to the ONU1 may include information indicating that the ONU1 enables the first capability, an Alloc ID used by the ONU1 to communicate with other ONUs, and a first traffic scheduling policy, where the first traffic scheduling policy is used to indicate a message carrying the first request information and the first authorization information.

For example, the OLT may obtain the usage division policy of Alloc IDs shown in table 1 below, allocate a usage Alloc ID range according to the capability information of ONU1 and MAC1 in table 1, allocate an Alloc ID for use by ONU1 in communication with the OLT to ONU1, allocate a usage Alloc ID range according to MAC2 in table 1, allocate an Alloc ID for use by ONU1 in communication with other ONUs to ONU1, and notify ONU 1. For the sake of convenience of distinction, in the present application, the allocation of the Alloc ID range to the MAC2 may be referred to as a first interval [ i, j ], where i and j are integers greater than 0 and i < j, and the allocation of the Alloc ID range to the MAC1 may be referred to as a second interval [ k, l ], where k and l are integers greater than 0 and k < l, and the first interval is different from the second interval. For example, referring to table 1, the first interval may be [8192,16383], and the second interval may be [1024,8191 ].

TABLE 1

It should be noted that, in the embodiment of the present application, the partitioning policy for use of Alloc IDs shown in table 1 may be obtained by modifying the partitioning policy for use of XG/XGs Alloc IDs according to ITU-T g.987.3 standard, that is, configuring a part of the range of Alloc IDs [1024,16383] originally configured to be allocated to MAC1 as the range of Alloc IDs (e.g., [8192,16383]) allocated to MAC 2. The OLT may obtain the content shown in table 1 from the local memory, may obtain the content shown in table 1 from the cloud, may obtain the content shown in table 1 before receiving the capability information from the ONU1, or may obtain the content shown in table 1 after receiving the capability information from the ONU, and the present application does not limit the obtaining manner and the obtaining timing of the usage partitioning policy of the Alloc ID.

For example, in this embodiment of the present application, any ONU may perform capability negotiation with the OLT in an ONU operating stage after completing registration with the OLT.

Referring to fig. 6, the registration process of the ONU may include the following three stages:

(1) sequence Number (SN) acquisition phase: the OLT broadcasts the SN request message and receives an SN response message (including SN reported by ONU1) from ONU1, and discovers the ONU through the SN and assigns ONU-ID to ONU 1.

(2) Ranging stage: the OLT broadcasts a ranging request message and receives a ranging response message from the ONU, and then notifies the ONU of an appropriate equalization delay parameter (EqD).

(3) And (3) an authentication stage: after the OLT enters an operating state, a Password (PWD) request is made to the ONU, and the PWD responded by the ONU is compared with the PWD configured locally. If the PWD responded by the ONU is the same as the PWD configured locally, allowing the ONU to be online and alarming to a host command line or a network management explosion-proof ONU online, and if the PWD responded by the ONU is different from the PWD configured locally, reporting a PWD error alarm to the host command line or the network management.

After successful authentication, the ONU1 enters the operation phase.

During the ONU1 operation phase, the OLT allocates ONU1 with a default ONU Management and Control Interface (OMCI) bandwidth that can be used for the MAC1 module of ONU1 to communicate with the OLT. In the operation stage of the MAC1 module, in the process of the ONU interacting with the OLT to perform OMCI configuration recovery and OMCI management, the OLT and the ONU may complete the capability negotiation process as shown in S501-S502.

The registration process, the OMCI configuration recovery process, and the OMCI management process may be implemented by Physical Layer Operation Administration and Maintenance (PLOAM) message interaction, and accordingly, both the capability information reported by the ONU in S501 and the configuration information issued by the OLT in S502 may be carried in the related PLOAM message. The PLOAM message for carrying the capability information or the configuration information may be an interactive message specified by a protocol, or may be a corresponding PLOAM message extended for implementing the capability negotiation mechanism, which is not limited in this application.

For example, as shown in table 2 below, an example of the definition of the extended PLOAM message for reporting the capability information by the ONU is as follows:

TABLE 2

As shown in table 2, the extended PLOAM message carried by the capability information reported by the ONU to the OLT may include, for example, 1-12 fields, each field is 8 bytes (Octets), and the content sequentially carried by these 12 fields may include an ONU-ID, a message identifier, east-west traffic capability information, east-west channel type, and null (reserved field), so as to report to the OLT whether or not the OLT itself has the capability of communicating with other ONUs.

For example, as shown in table 3 below, an example of the definition of the extended PLOAM message for the OLT to issue the configuration information is as follows:

TABLE 3

As shown in table 3, the extended PLOAM message carried in the configuration information sent by the OLT to the ONU may include, for example, 1 to 12 fields, each field is 8 bytes (Octets), and the content carried in the 12 fields in turn may include an ONU-ID, a message identifier, two-channel low latency capability information, an east-west channel type, a north-south channel Alloc ID range, an east-west channel Alloc ID range, and a null (reserved field) to indicate that the ONU enables the two-channel low latency capability, communicate with the OLT based on the north-south channel Alloc ID range indicated in the configuration information, and communicate with other ONUs based on the east-west channel Alloc ID range indicated in the configuration information.

It should be understood that the above description is only an illustration and not a limitation of the timing and implementation of capability negotiation between an ONU and an OLT in this application, and that other implementations are also possible in other embodiments, for example, an ONU performs a service for communicating with other ONUs, and this application does not limit this.

Bandwidth authorization phase

In the embodiment of the present application, a bandwidth occupied by the ONU for communicating with other ONUs may be a fixed bandwidth, or may be dynamically allocated by the ONU requesting the OLT. The ONU can obtain the authorization information of the corresponding bandwidth by reporting the bandwidth request information to the OLT, thereby communicating with other ONUs based on the bandwidth indicated by the authorization information. The first traffic scheduling policy is used to indicate a message carrying the first request information and the first authorization information, and during the operation of the ONU and the communication with other devices (including the OLT and/or other ONUs), the OLT may perform traffic scheduling on the ONU according to the communication capability and/or the service data of the ONU, so as to implement the communication between the ONU and the OLT or other ONUs.

Referring to fig. 5, in the bandwidth authorization phase, the communication method may include the following steps:

s503: ONU1 sends first request information to an OLT, the first request information requesting the OLT to configure a first bandwidth for the ONU for communicating with other ONUs by the ONU 1.

S504: the OLT receives first request information from ONU1 and configures a first bandwidth for ONU1 according to the first request information.

S505: the OLT sends the first authorization information to the ONU 1. The first grant information is used to indicate the first bandwidth.

S506: the ONU1 receives the first grant information from the OLT and communicates with the other ONU based on the first bandwidth.

In the embodiment of the present application, during the ONU1 operation stage, since ONU1 has already completed registration activation, the MAC1 module of ONU1 can communicate with the OLT through transmitter 1 and receiver 1. Accordingly, the MAC2 module of ONU1 may send the first request information to the OLT through an upstream channel between ONU1 and the OLT by means of the MAC1 module. Accordingly, the OLT may transmit the first authorization information to ONU1 through a downstream channel between the OLT and ONU1, the MAC1 module of ONU1 may forward the first authorization information to the MAC2 module, and the MAC2 module may communicate with other ONUs according to the first bandwidth indicated by the first authorization information.

In this embodiment, the first request information and the first authorization information interacted between the ONU1 and the OLT may include various messages interacted between the two parties, and when the ONU1 is applied to different optical communication systems, the messages carrying the first request information and/or the first authorization information may also have different names. The following examples are given.

Example one

In a GPON system, a TWDM-PON system, an XG-PON system, an XGs-PON system, etc., the first request information may be contained in the uplink dynamic bandwidth report DBRu; and/or the first authorization information is contained in a bandwidth map BWmap message. Alternatively, in an EPON system, a 10G-EPON system, or the like, the first request message may be included in an upstream REPORT message; and/or the first authorization information is contained in a downstream GATE message. It should be understood that, new technology of future evolution will increase the speed of PON to 25Gbps, 50Gbps and even 100Gbps, and accordingly, the message for carrying the first request information or the first authorization information may also evolve therewith, which is not limited in this application.

Taking DBRu as an example, wherein the DBRu comprises a first Allocation field in a set uplink frame; the uplink frame further includes a second Allocation field, where the second Allocation field is used to carry second request information, the second request information is used to request the OLT to configure a second bandwidth for the ONU, and the second bandwidth is used for the ONU to communicate with the OLT.

Referring to fig. 7, taking the example that the first request message is included in the DBRu in the XG-PON system, the set upstream frame may be an XG-PON transmission convergence (XGTC) frame sent by the MAC1 module to the OLT. An Allocation field corresponding to the MAC1 module (for the sake of distinction, the Allocation field is denoted as an Allocation a field) may be included in the XGTC frame, and the Allocation a field may include a DBRu reporting T-CONT corresponding to the MAC1 module to request the OLT to perform dynamic bandwidth Allocation on the MAC1 module, so that the MAC1 module can communicate with the OLT based on the second bandwidth allocated by the OLT. In order to implement traffic scheduling for communication between ONUs, the MAC2 module may insert, by using the MAC1 module, an Allocation field corresponding to the MAC2 module (for convenience of distinction, the Allocation field is denoted as an Allocation B field), which may include a DBRu reporting a T-CONT corresponding to the MAC2 module, to request the OLT to perform dynamic bandwidth Allocation on the MAC2 module, so that the MAC2 module communicates with other ONUs based on a first bandwidth allocated by the OLT. The DBRu in the Allocation B field is the DBRu reported to the T-CONT of the MAC2 module, the T-CONT of the MAC2 module may be the Allocation ID in the first interval obtained in the capability negotiation process, and the payload (payload) may be filled with an idle code or other information.

Accordingly, the OLT may perform parsing calculation on the DBRu in the Allocation B field through the DBA2 module corresponding to the MAC2 module to dynamically adjust and allocate the first bandwidth to the MAC2 module, and perform parsing calculation on the DBRu in the Allocation a field through the DBA1 module corresponding to the MAC1 module to dynamically adjust and allocate the second bandwidth to the MAC1 module. The calculation results of the DBA1 module and the DBA2 module can be issued to the corresponding MAC1 module and MAC2 module in the ONU1 in the form of BW Map. For convenience of distinction, the BW Map corresponding to the MAC1 module is recorded as BWmap1, the BW Map corresponding to the MAC2 module is recorded as BWmap2, and BWmap2 may be issued to the ONU1 by the MAC1 module and forwarded to the MAC2 module by the MAC1 module. It is understood that BWmap2 may also be inserted into the downlink frame where BWmap1 is located in a similar manner as in fig. 7, and will not be described herein again.

It should be understood that if the T-CONT corresponding to the MAC2 module is a fixed (fix) bandwidth, the corresponding Allocation field may not be inserted into the configured upstream frame, i.e. the MAC2 module does not request the OLT to perform dynamic bandwidth Allocation. Also, in the case where ONU1 has been allocated T-CONT for MAC2 module to communicate with other ONUs, when OLT performs DBA allocation to MAC1 module, it is necessary to consider deduction of the bandwidth allocated to MAC2 module, that is, the first bandwidth allocated to MAC2 module is different from the second bandwidth allocated to MAC1 module. It should be noted that the uplink frame sent by the MAC1 module to the OLT for carrying the first request information may further include other information, the uplink frame may also be included in other uplink frames, the downlink frame sent by the OLT to the MAC1 module for carrying the first grant information may also include other information, and the downlink frame may also be included in other information, which is not limited in this application.

Example two

In the embodiment of the present application, in consideration of clouding DBA, a set encapsulation protocol may be agreed between the ONU1 and the OLT, and the encapsulation protocol may be used for transmitting the first request information and the first authorization information between the ONU1 and the OLT.

Specifically, the first request information/first authorization information may include a first MAC address (i.e., an address of a MAC2 module) for ONU1 to communicate with the other ONUs. In S503, the MAC1 module of the ONU1 may encapsulate the first request message according to the set encapsulation protocol, and obtain a first data packet. Then, the MAC1 module sends the first data packet to the OLT through an upstream traffic channel between ONU1 and the OLT, and the OLT parses the first data packet, and then forwards the first request information to the DBA2 module for processing, so as to allocate a first bandwidth to the MAC2 module. Correspondingly, after the DBA2 module completes the calculation, the first authorization information is obtained, and the OLT may encapsulate the first authorization information based on the encapsulation protocol to obtain a second data packet, and issue the second data packet to the MAC1 module of the ONU1 through a downstream service channel between the OLT and the ONU1, and forward the second data packet to the MAC2 module through the MAC1 module.

It should be understood that, in this embodiment of the present application, there may be multiple implementation manners of the encapsulation protocol that may be set by agreement between the ONU1 and the OLT, the first data packet may further include other information besides the first request information, and the second data packet may further include other information besides the first authorization information, which is not limited in this application.

Example three

In a GPON system, a TWDM-PON system, an XG-PON system, an XGs-PON system, or the like, the first request information is contained in an upstream PLOAM (i.e., PLOAMu) message; and/or, the first authorization information is contained in a downlink PLOAM (i.e., PLOAMd) message. Or, in an EPON system, a 10G-EPON system, or the like, the first request information is included in an uplink multi-point control protocol (MPCP) message; and/or the first authorization information is contained in a downlink MPCP message.

Example four

In a GPON system, a TWDM-PON system, an XG-PON system, an XGs-PON system, or the like, the first request information may be contained in an upstream OMCI message; and/or the first authorization information is contained in a downlink OMCI message. Alternatively, in an EPON system, a 10G-EPON system, or the like, the first request information is included in an upstream OAM (i.e., OAMu) message; and/or the first authorization information is contained in a downstream OAM (i.e., OAMd) message.

It should be understood that, in this embodiment of the present application, the message for carrying the first request message/the first authorization message may be an interaction message specified by a protocol, or may be an extension message added to implement east-west traffic scheduling for the ONU1, which is not limited in this application. For the protocol-specified interaction message, for example, the manner shown in fig. 7 may be referred to, and a field for carrying the first request message/first authorization information is inserted in the corresponding message, and for the extension message, for example, the message format may be defined in the manner shown in table 2 or table 3 above, so that the ONU1 and the OLT complete the interaction regarding the bandwidth request and the bandwidth authorization. The message, indicated in the first traffic scheduling policy negotiated and determined by the ONU1 and the OLT in the capability negotiation stage, for carrying the first request information/the first authorization information may correspond to any one of the first to fourth examples described above, or may be other messages, which is not described herein again.

Therefore, in the ONU operating stage, the ONU may transmit the relevant request information and the corresponding authorization information required for traffic scheduling with the OLT, so as to implement traffic scheduling for communication between the ONU and other ONUs, and avoid traffic detour, so that the communication scheme is suitable for replacing ethernet networking and applied to a scenario where internal horizontal communication (referred to as east-west traffic) between different ONUs is dominant, such as an office, a library, a conference room, and the like, thereby expanding an application scenario of the PON system.

Fig. 8 is a schematic block diagram of an apparatus 800 provided in this embodiment of the application, configured to implement the functions of the optical network unit ONU and the optical line termination OLT in the foregoing methods. The apparatus may be, for example, a software module or a system-on-a-chip. The chip system may be composed of a chip, and may also include a chip and other discrete devices. The apparatus 800 includes a communication module 801 and may also include a control module 802. The communication module 801 can communicate with the outside. And a control module 802 for performing the processing. The communication module 801 may also be referred to as a communication interface, a transceiver module, an input/output interface, etc. For example, the communication module may include a sending module and a receiving module, which are respectively configured to execute the steps of sending or receiving by the ONU and the OLT in the flows of fig. 5 and 6.

In one example, the apparatus 800 may implement the steps implemented by the ONU in the flow shown in fig. 5 or fig. 6 above. A communication module 801, configured to perform transceiving related operations on the ONU side in the foregoing method embodiments. The control module 802 is configured to perform the processing related operations on the ONU side in the above method embodiments, including but not limited to: generate information, messages, etc. for transmission by the communication module 801, and/or demodulate and decode signals received by the communication module 801.

For example, under the control of the control module 802, the communication module 801 may be configured to communicate with other devices, for example, send first request information to an optical line terminal OLT, where the first request information is used to request the OLT to configure a first bandwidth for the ONU, and the first bandwidth is used for the ONU to communicate with other ONUs; receiving first authorization information from the OLT, wherein the first authorization information is used for indicating the first bandwidth; communicating with the other ONUs based on the first bandwidth.

The above communication module 801 sends the first request information to the optical line termination OLT, and may include: sending the first request message to the OLT through an uplink channel between the ONU and the OLT; receiving first authorization information from the OLT, including: and receiving first authorization information from the OLT through a downlink channel between the ONU and the OLT.

Illustratively, the first request information is contained in an uplink dynamic bandwidth report DBRu; and/or, the first authorization information is contained in a bandwidth map BWmap message; or, the first request message is contained in an uplink REPORT message; and/or the first authorization information is contained in a downstream GATE message. Wherein, the DBRu may include a first Allocation field in a set uplink frame; the uplink frame further includes a second Allocation field, where the second Allocation field is used to carry second request information, the second request information is used to request the OLT to configure a second bandwidth for the ONU, and the second bandwidth is used for the ONU to communicate with the OLT.

For example, the first request message includes the first MAC address, and the first MAC address is used for the ONU to communicate with the other ONU. When the communication module 801 sends the first request information to the OLT, the control module 802 may encapsulate the first request information based on a set encapsulation protocol to obtain a first data packet; the first data packet is then sent to the OLT via the communication module 801. Wherein the first authorization information is encapsulated in a second packet obtained based on the encapsulation protocol, the first authorization information including the first MAC address.

For example, before sending the first request information to the OLT, the control module 802 may also send capability information to the OLT through the communication module 801; the capability information is used for indicating that the ONU has a first capability of communicating with other ONUs and a communication channel type corresponding to the first capability. Then, the configuration information from the OLT is received through a communication module 801; the configuration information is configured by the OLT according to the capability information, and the configuration information includes information for indicating that the first capability is enabled, an Alloc ID used by the ONU for communicating with the other ONUs, and a first traffic scheduling policy, where the first traffic scheduling policy is used for indicating a message for carrying the first request information and the first authorization information.

For example, the Alloc ID used by the ONU to communicate with the other ONU is within a first interval, and the Alloc ID used by the ONU to communicate with the OLT is within a second interval, where the first interval is different from the second interval.

For example, the ONU and the OLT belong to the same optical communication system, and the optical communication system is any one of the following: gigabit passive optical network GPON systems; an Ethernet Passive Optical Network (EPON) system; a 10gigabit Ethernet passive optical network 10G-EPON system; a TWDM-PON system of a time division and wavelength division multiplexing passive optical network; a 10gigabit passive optical network XG-PON system; a10 gigabit symmetric passive optical network XGS-PON system.

In one example, the apparatus 800 may implement the steps implemented by the OLT in the flow illustrated in fig. 5 or fig. 6 above. A communication module 801, configured to perform the transceiving related operations on the OLT side in the above method embodiments. The control module 802 is configured to perform the processing-related operations on the OLT side in the above method embodiments, including but not limited to: generate information, messages, etc. for transmission by the communication module 801, and/or demodulate and decode signals received by the communication module 801.

For example, the communication module 801 is configured to receive first request information from an optical network unit ONU. The control module 802 is configured to configure a first bandwidth for the ONU according to the first request message, where the first bandwidth is used for the ONU to communicate with other ONUs; the communication module 801 is further configured to send first authorization information to the ONU, where the first authorization information is used to indicate the first bandwidth, so that the ONU communicates with the other ONU based on the first bandwidth.

Illustratively, the communication module 801 receives first request information from an optical network unit ONU, including: receiving the first request information from the ONU through an upstream channel between the OLT and the ONU; sending first authorization information to the ONU, including: and sending the first authorization information to the ONU through a downlink channel between the OLT and the ONU.

Illustratively, the first request information is contained in an uplink dynamic bandwidth report DBRu; and/or, the first authorization information is contained in a bandwidth map BWmap message; or, the first request message is contained in an uplink REPORT message; and/or the first authorization information is contained in a downstream GATE message. The DBRu comprises a first Allocation field in a set uplink frame; the uplink frame further includes a second Allocation field, where the second field Allocation is used to carry second request information, the second request information is used to request the OLT to configure a second bandwidth for the ONU, and the second bandwidth is used for the ONU to communicate with the OLT.

Illustratively, the first request message is encapsulated in a first data packet obtained based on a set encapsulation protocol, and the first request message includes a first MAC address, and the first MAC address is used for the ONU to communicate with the other ONUs; the first authorization information comprises the first MAC address; when the communication module 801 sends the first authorization information to the ONU, the control module 802 encapsulates the first authorization information based on the encapsulation protocol to obtain a second data packet; the second data packet is then sent to the ONU via communication module 801.

Exemplarily, the first request information is included in an uplink physical layer operation management and maintenance PLOAMu message; and/or, the first authorization information is contained in a downlink physical layer operation management and maintenance PLOAMd message; or, the first request information is contained in an uplink MPCP message; and/or, the first authorization information is contained in a downlink MPCP message.

For example, before the communication module 801 receives the first request information from the ONU, it is further configured to: receiving capability information from the ONU; the capability information is used for indicating that the ONU has a first capability of communicating with other ONUs and a communication channel type corresponding to the first capability; the control module 802 is further configured to configure according to the capability information and send configuration information to the ONU; the configuration information includes information for instructing the ONU to enable the first capability, an Alloc ID used by the ONU to communicate with the other ONU, and a first traffic scheduling policy, where the first traffic scheduling policy is used to instruct a message carrying the first request information and the first authorization information.

For example, the OLT and the ONU belong to the same optical communication system, and the optical communication system is any one of the following: gigabit passive optical network GPON systems; an Ethernet Passive Optical Network (EPON) system; a 10gigabit Ethernet passive optical network 10G-EPON system; a TWDM-PON system of a time division and wavelength division multiplexing passive optical network; a 10gigabit passive optical network XG-PON system; a10 gigabit symmetric passive optical network XGS-PON system.

The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

It is understood that the functions of the communication module in the above embodiments may be implemented by a transceiver (also referred to as a transceiver), and the functions of the control module may be implemented by a controller. The transceiver may comprise a transmitter and/or a receiver, etc. for performing the functions of the transmitting module and/or the receiving module, respectively. This is illustrated below with reference to fig. 9.

Fig. 9 is a schematic block diagram of a device 900 according to an embodiment of the present application, where the device 900 shown in fig. 9 may be a method for implementing a hardware circuit of the device shown in fig. 8, and the device may be applied to the flows shown in fig. 5 and fig. 6 to execute the functions of the ONU and the OLT in the above method embodiments. For ease of illustration, fig. 9 shows only the main components of the device.

The apparatus 900 shown in fig. 9 includes at least one controller 901. The apparatus 900 may also include at least one memory 902 for storing program instructions and/or data. A memory 902 is coupled to the controller 901. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The controller 901 may operate in conjunction with the memory 902, the controller 901 may execute program instructions stored in the memory 902, and at least one of the at least one memory 902 may be included in the controller 901.

The apparatus 900 may also include a communication interface 903 for communicating with other devices over a transmission medium, such that the apparatus 900 may communicate with other devices. In embodiments of the present application, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface. In the embodiment of the present application, when the communication interface is a transceiver, the transceiver may include an independent receiver and an independent transmitter; a transceiver that integrates transceiving functions, or an interface circuit may be used.

It should be understood that the connection medium between the controller 901, the memory 902, and the communication interface 903 is not limited in the embodiment of the present application. In the embodiment of the present application, the memory 902, the controller 901, and the communication interface 903 are connected by the communication bus 904 in fig. 9, the bus is represented by a thick line in fig. 9, and the connection manner between other components is only illustrative and not limiting. The bus may include an address bus, a data bus, a control bus, and the like. For ease of illustration, fig. 9 is shown with only one thick line, but does not show only one bus or one type of bus or the like.

In one example, the apparatus 900 may be configured to implement the steps performed by the ONU in the flows shown in fig. 5 or fig. 6. The apparatus 900 may be an ONU, or a chip or circuit within an ONU. The communication interface is used for performing the relevant operations of ONU-side transceiving in the above embodiments, and the controller 901 is used for performing the relevant operations of ONU processing in the above method embodiments, including but not limited to: information and messages transmitted by the communication interface 903 are generated, and/or signals received by the communication interface 903 are demodulated and decoded, and the like.

For example, under the control of the controller 901, the communication interface 903 is configured to send first request information to an optical line terminal OLT, where the first request information is used to request the OLT to configure a first bandwidth for the ONU, and the first bandwidth is used for the ONU to communicate with other ONUs; receiving first authorization information from the OLT, wherein the first authorization information is used for indicating the first bandwidth; communicating with the other ONUs based on the first bandwidth.

The sending, by the communication interface 903, the first request message to the optical line termination OLT may include: sending the first request message to the OLT through an uplink channel between the ONU and the OLT; receiving first authorization information from the OLT, including: and receiving first authorization information from the OLT through a downlink channel between the ONU and the OLT.

Illustratively, the first request information is contained in an uplink dynamic bandwidth report DBRu; and/or, the first authorization information is contained in a bandwidth map BWmap message; or, the first request message is contained in an uplink REPORT message; and/or, the first authorization information is contained in a downlink GATE message. Wherein, the DBRu may include a first Allocation field in a set uplink frame; the uplink frame further includes a second Allocation field, where the second Allocation field is used to carry second request information, the second request information is used to request the OLT to configure a second bandwidth for the ONU, and the second bandwidth is used for the ONU to communicate with the OLT.

For example, the first request message includes the first MAC address, and the first MAC address is used for the ONU to communicate with the other ONU. When the communication interface 903 sends the first request information to the OLT, the controller 901 may encapsulate the first request information based on a set encapsulation protocol to obtain a first data packet; the first data packet is then sent to the OLT through a communication interface 903. Wherein the first authorization information is encapsulated in a second packet obtained based on the encapsulation protocol, the first authorization information including the first MAC address.

For example, before sending the first request information to the OLT, the controller 901 may further send capability information to the OLT through the communication interface 903; the capability information is used for indicating that the ONU has a first capability of communicating with other ONUs and a communication channel type corresponding to the first capability. Then, receiving configuration information from the OLT through a communication interface 903; the configuration information is configured by the OLT according to the capability information, and the configuration information includes information for indicating that the first capability is enabled, Alloc IDs used by the ONU to communicate with the other ONUs, and a first traffic scheduling policy, where the first traffic scheduling policy is used for indicating messages for carrying the first request information and the first authorization information.

In one example, the apparatus 900 may be configured to implement the steps performed by the OLT in the flow shown in fig. 5 or fig. 6. The apparatus 900 may be an OLT, or a chip or circuit in an OLT. The communication interface is used for performing the operations related to the transceiving of the OLT side in the above embodiments, and the controller is used for performing the processing related operations of the OLT in the above method embodiments, including but not limited to: information and messages transmitted by the communication interface 903 are generated, and/or signals received by the communication interface 903 are demodulated and decoded, and the like.

For example, the communication interface 903 is configured to receive first request information from an optical network unit ONU. The controller 901 is configured to configure a first bandwidth for the ONU according to the first request information, where the first bandwidth is used for the ONU to communicate with other ONUs; the communication interface 903 is further configured to send first authorization information to the ONU, where the first authorization information is used to indicate the first bandwidth, so that the ONU communicates with the other ONU based on the first bandwidth.

Illustratively, the communication interface 903 receives first request information from an optical network unit ONU, and includes: receiving the first request information from the ONU through an upstream channel between the OLT and the ONU; sending first authorization information to the ONU, including: and sending the first authorization information to the ONU through a downlink channel between the OLT and the ONU.

Illustratively, the first request information is contained in an uplink dynamic bandwidth report DBRu; and/or, the first authorization information is contained in a bandwidth map BWmap message; or, the first request message is contained in an uplink REPORT message; and/or, the first authorization information is contained in a downlink GATE message. The DBRu comprises a first Allocation field in a set uplink frame; the uplink frame further includes a second Allocation field, where the second field Allocation is used to carry second request information, the second request information is used to request the OLT to configure a second bandwidth for the ONU, and the second bandwidth is used for the ONU to communicate with the OLT.

Illustratively, the first request message is encapsulated in a first data packet obtained based on a set encapsulation protocol, and the first request message includes a first MAC address, and the first MAC address is used for the ONU to communicate with the other ONUs; the first authorization information comprises the first MAC address; when the communication interface 903 sends the first authorization information to the ONU, the controller 901 encapsulates the first authorization information based on the encapsulation protocol to obtain a second data packet; the second data packet is then sent to the ONU over communication interface 903.

Illustratively, the first request message is included in an uplink physical layer operation management and maintenance PLOAMu message; and/or the first authorization information is contained in a downlink physical layer operation management and maintenance PLOAMd message; or, the first request information is contained in an uplink MPCP message; and/or the first authorization information is contained in a downlink MPCP message.

Illustratively, before the communication interface 903 receives the first request information from the ONU, it is further configured to: receiving capability information from the ONU; the capability information is used for indicating that the ONU has a first capability of communicating with other ONUs and a communication channel type corresponding to the first capability; the controller 901 is further configured to configure according to the capability information and send configuration information to the ONU; the configuration information includes information for instructing the ONU to enable the first capability, an Alloc ID used by the ONU to communicate with the other ONU, and a first traffic scheduling policy, where the first traffic scheduling policy is used to instruct a message carrying the first request information and the first authorization information.

In the embodiments of the present application, the controller may also be referred to as a processor, which may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in a processor.

In the embodiment of the present application, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), for example. The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

The method provided by the embodiment of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, 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 loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disc (DVD)), or a semiconductor medium (e.g., an SSD), etc.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b and c can be single or multiple.

Claims

1. A communication method is applied to an Optical Network Unit (ONU), and comprises the following steps:

sending first request information to an Optical Line Terminal (OLT), wherein the first request information is used for requesting the OLT to configure a first bandwidth for the ONU, and the first bandwidth is used for the ONU to communicate with other ONUs;

receiving first authorization information from the OLT, wherein the first authorization information is used for indicating the first bandwidth;

communicating with the other ONUs based on the first bandwidth.

2. The method according to claim 1, wherein sending the first request message to the optical line termination OLT comprises:

sending the first request message to the OLT through an uplink channel between the ONU and the OLT;

receiving first authorization information from the OLT, including:

and receiving first authorization information from the OLT through a downlink channel between the ONU and the OLT.

3. The method according to claim 1 or 2,

the first request message is contained in an uplink dynamic bandwidth report DBRu; and/or, the first authorization information is contained in a bandwidth map BWmap message; alternatively, the first and second electrodes may be,

the first request message is contained in an upstream REPORT message; and/or the first authorization information is contained in a downstream GATE message.

4. The method of claim 3, wherein the DBRu contains a first Allocation field in a configured upstream frame; the uplink frame further includes a second Allocation field, where the second Allocation field is used to carry second request information, the second request information is used to request the OLT to configure a second bandwidth for the ONU, and the second bandwidth is used for the ONU to communicate with the OLT.

5. The method according to claim 1 or 2, wherein the first request message comprises the first MAC address, the first MAC address being used for the ONU to communicate with the other ONU; sending first request information to the OLT, wherein the first request information comprises:

packaging the first request information based on a set packaging protocol to obtain a first data packet;

sending the first data packet to the OLT;

wherein the first authorization information is encapsulated in a second packet obtained based on the encapsulation protocol, the first authorization information including the first MAC address.

6. The method according to claim 1 or 2,

the first request information is contained in an uplink physical layer operation management and maintenance PLOAmu message; and/or, the first authorization information is contained in a downlink physical layer operation management and maintenance PLOAMd message; alternatively, the first and second electrodes may be,

the first request information is included in an uplink MPCP message; and/or, the first authorization information is contained in a downlink MPCP message.

7. The method according to claim 1 or 2,

the first request information is contained in an uplink ONU management and control interface OMCI message; and/or, the first authorization information is contained in a downstream ONU management and control interface OMCI message; alternatively, the first and second electrodes may be,

the first request information is contained in an OAmu message of uplink operation management and maintenance; and/or the first authorization information is contained in a downlink operation management and maintenance OAMd message.

8. The method according to any of claims 1-7, wherein before sending the first request information to the OLT, the method further comprises:

sending capability information to the OLT; the capability information is used for indicating that the ONU has a first capability of communicating with other ONUs and a communication channel type corresponding to the first capability;

receiving configuration information from the OLT; the configuration information is configured by the OLT according to the capability information, and the configuration information includes information for indicating that the first capability is enabled, an Alloc ID used by the ONU for communicating with the other ONUs, and a first traffic scheduling policy, where the first traffic scheduling policy is used for indicating a message for carrying the first request information and the first authorization information.

9. The method according to any of claims 1-8, wherein the Alloc IDs used by the ONU to communicate with the other ONUs are within a first interval, and wherein the Alloc IDs used by the ONU to communicate with the OLT are within a second interval, and wherein the first interval is different from the second interval.

10. The method according to any of claims 1-9, wherein the ONU and the OLT belong to the same optical communication system, and wherein the optical communication system is any of:

gigabit passive optical network GPON systems;

an Ethernet Passive Optical Network (EPON) system;

a 10gigabit Ethernet passive optical network 10G-EPON system;

a TWDM-PON system of a time division and wavelength division multiplexing passive optical network;

a 10gigabit passive optical network XG-PON system;

a10 gigabit symmetric passive optical network XGS-PON system.

11. A communication method is applied to an Optical Line Terminal (OLT), and comprises the following steps:

receiving first request information from an Optical Network Unit (ONU);

configuring a first bandwidth for the ONU according to the first request information, wherein the first bandwidth is used for the ONU to communicate with other ONUs;

sending first authorization information to the ONU, wherein the first authorization information is used for indicating the first bandwidth so that the ONU can communicate with other ONUs based on the first bandwidth.

12. The method of claim 11, wherein receiving the first request message from the ONU comprises:

receiving the first request information from the ONU through an upstream channel between the OLT and the ONU;

sending first authorization information to the ONU, including:

and sending the first authorization information to the ONU through a downlink channel between the OLT and the ONU.

13. The method according to claim 11 or 12,

14. The method of claim 13, wherein the DBRu comprises a first Allocation field in a configured upstream frame; the uplink frame further includes a second Allocation field, where the second field Allocation is used to carry second request information, the second request information is used to request the OLT to configure a second bandwidth for the ONU, and the second bandwidth is used for the ONU to communicate with the OLT.

15. The method according to claim 11 or 12, wherein the first request message is encapsulated in a first data packet obtained based on a set encapsulation protocol, and the first request message includes a first MAC address, and the first MAC address is used for the ONU to communicate with the other ONU; the first authorization information comprises the first MAC address; sending first authorization information to the ONU, including:

packaging the first authorization information based on the packaging protocol to obtain a second data packet;

and sending the second data packet to the ONU.

16. The method according to claim 11 or 12,

the first request information is included in an uplink MPCP message; and/or the first authorization information is contained in a downlink MPCP message.

17. The method according to claim 11 or 12,

the first request information is contained in an OAmu message of uplink operation management and maintenance; and/or the first authorization information is contained in the downstream operation management and maintenance OAMd message.

18. The method according to any of claims 11-17, wherein prior to receiving the first request message from the ONU, the method further comprises:

receiving capability information from the ONU; the capability information is used for indicating that the ONU has a first capability of communicating with other ONUs and a communication channel type corresponding to the first capability;

configuring according to the capability information and sending configuration information to the ONU; the configuration information includes information for instructing the ONU to enable the first capability, an Alloc ID used by the ONU to communicate with the other ONU, and a first traffic scheduling policy, where the first traffic scheduling policy is used to instruct a message carrying the first request information and the first authorization information.

19. The method of any of claims 11-18, wherein the Alloc IDs used by the ONU to communicate with the other ONUs are within a first interval, wherein the Alloc IDs used by the ONU to communicate with the OLT are within a second interval, and wherein the first interval is different from the second interval.

20. The method according to any of claims 11-19, wherein the OLT and the ONU belong to the same optical communication system, and wherein the optical communication system is any of:

gigabit passive optical network GPON systems;

an Ethernet Passive Optical Network (EPON) system;

a 10gigabit Ethernet passive optical network 10G-EPON system;

a 10gigabit passive optical network XG-PON system;

a10 gigabit symmetric passive optical network XGS-PON system.

21. An optical network unit, ONU, comprising a transceiver and a controller;

the transceiver is used for communicating with other equipment;

the controller for invoking program instructions to implement the method of any of claims 1-10.

22. The optical network unit of claim 21, wherein the apparatus further comprises a memory storing program instructions invoked by the controller.

23. An Optical Line Terminal (OLT), comprising a transceiver and a controller;

the transceiver is used for communicating with other equipment;

the controller for invoking program instructions to implement the method of any of claims 11-20.

24. The olt of claim 23, wherein the apparatus further comprises a memory that stores program instructions that are invoked by the controller.

25. An optical communication system comprising at least two optical network units, ONU, according to any of claims 21-22 and an optical line termination, OLT, according to any of claims 23-24.

26. The optical communication system of claim 25, wherein the optical communication system is any one of:

gigabit passive optical network GPON systems;

an Ethernet Passive Optical Network (EPON) system;

a 10gigabit Ethernet passive optical network 10G-EPON system;

a 10gigabit passive optical network XG-PON system;

a10 gigabit symmetric passive optical network XGS-PON system.

27. A computer-readable storage medium having stored thereon computer instructions which, when executed by a computer, cause the method of any of claims 1-10 or 11-20 to be performed.