WO2015100534A1

WO2015100534A1 - Ethernet passive optical network communication method, device and system

Info

Publication number: WO2015100534A1
Application number: PCT/CN2013/090878
Authority: WO
Inventors: 李三中; 万席峰; 梁选勤
Original assignee: 华为技术有限公司
Priority date: 2013-12-30
Filing date: 2013-12-30
Publication date: 2015-07-09
Also published as: CN105210325A

Abstract

Provided in an embodiment of the present invention are an Ethernet passive optical network communication method, device and system, capable of supporting a higher uplink rate, thus solving the problem of poor user experience resulting from insufficient bandwidth. The method comprises: an optical link terminal (OLT) transmits an uplink 2.5 G discovery window message; the OLT receives a registration request message transmitted by an optical network unit (ONU) supporting uplink 2.5 G according to the discovery window message; The OLT transmits to the ONU a registration message comprising a logical link identifier (LLID) allocated by the OLT for the ONU; the OLT receives a registration success message transmitted by the ONU. The Ethernet passive optical network of the embodiment of the present invention opens an uplink 2.5 G discovery window for an ONU via an OLT, so that the ONU supporting the uplink 2.5 G can complete registration and work at downlink 10 G/uplink 2.5 G, providing a higher uplink rate/bandwidth and thus improving user experience.

Description

Communication method, device and system for Ethernet passive optical network

The present invention relates to the field of optical communications, and more particularly to a communication method, apparatus and system for an Ethernet passive optical network. Background technique

Ethernet Passive Optical Network (EPON) is a new type of optical access network technology that uses a point-to-multipoint architecture and transmits over passive optical fibers to provide multiple services over Ethernet. The original EPON can provide uplink and downlink symmetrical 1.25 Gb/s (Gigabit per Second) line rate. With the development of technology, the current EPON has been upgraded to 10.3125 Gb/s (10G) The downlink rate, ie 10G EPON. The existing 10G EPON standard defines an asymmetric mode, the uplink line rate supports 1.25Gb/s (1G), and the downlink rate is 10.3125Gb/s; the uplink 10G/uplink 1G mode uplink rate ( Bandwidth) is only 1.25G. In the current situation of network data traffic bloating, especially in the case of fiber to the office (FTTO), that is, the government and enterprise access, there are a large number of symmetric traffic data services, such as video real-time monitoring and other applications, The uplink bandwidth requirement is large. The downlink 10G/uplink 1G mode will seriously restrict the actual application due to the shortage of uplink bandwidth, which will reduce the user experience. Summary of the invention

The embodiments of the present invention provide a communication method, device, and system for an Ethernet passive optical network, which can support a higher uplink rate, thereby reducing the user experience degradation caused by insufficient bandwidth.

The first aspect provides a communication method, including: the optical line terminal OLT sends an uplink 2.5G discovery window message; the OLT receives a registration request message sent by the optical network unit ONU supporting the uplink 2.5G according to the discovery window message; The OLT sends a registration message to the ONU, where the registration message includes a logical link identifier LLID assigned by the OLT to the ONU; and the OLT receives a registration success message sent by the ONU.

With reference to the first aspect, in a first implementation manner of the first aspect, the initial working mode of the ONU is an uplink 2.5G, and the registration request message received by the OLT includes: a capability field of G; and indicating that the ONU is currently requesting registration as Upstream 2.5G request field.

With reference to the first aspect and the foregoing implementation manner, in a second implementation manner of the first aspect, the initial working mode of the ONU is an uplink 1G, and the registration request message received by the OLT includes: The ONU supports both the uplink 1G and uplink 2.5G capability fields; and a request field for indicating that the ONU is currently requesting registration as an uplink 2.5G.

With reference to the first aspect and the foregoing implementation manner, in a third implementation manner of the first aspect, after the OLT receives the registration request message sent by the optical network unit ONU supporting the uplink 2.5G according to the discovery window message, Determining, according to the capability field and the request field of the registration request message, an LLID, a synchronization time, and an upper limit of a laser switching time allocated to the ONU; generating an LLID, a synchronization time, and an upper limit of a laser switching time. Registration message.

With reference to the first aspect and the foregoing implementation manner, in a fourth implementation manner of the first aspect, after the OLT receives the registration success message sent by the ONU, the method further includes: performing, on the logical link corresponding to the LLID, The ONU performs data transmission of a maximum downlink 10G/uplink 2.5G.

With reference to the first aspect and the foregoing implementation manner, in a fifth implementation manner of the first aspect, the initial working mode of the ONU is an uplink 1G, and the optical line terminal OLT includes before sending an uplink 2.5G discovery window message. Sending an uplink 1G discovery window message; receiving a registration request message sent by the ONU according to the uplink 1G discovery window message, where the registration request message includes an capability field for indicating that the ONU supports uplink 1G, and is used to indicate The ONU currently requests to register as a request field of the uplink 1G; and sends a registration message to the ONU, where the registration message includes a logical link identifier LLID assigned by the OLT to the ONU; and receiving a registration success message sent by the ONU, To complete the registration of the ONU uplink 1G.

With reference to the first aspect and the foregoing implementation manner, in a sixth implementation manner of the first aspect, after the receiving the registration success message sent by the ONU, the method further includes: sending a query message to the ONU, so as to query the location The uplink transmission capability of the ONU is received; the response message sent by the ONU is received, the response message indicates that the ONU supports uplink 1G and uplink 2.5G; and the ONU is sent to indicate that the ONU switches to the uplink 2.5G working mode. The indication message is such that the ONU switches to the uplink 2.5G working mode and records the current working mode as 2.5G and the offline reset, so that the ONU receives the uplink 2.5G discovery window sent by the OLT. G registration.

In combination with the first aspect and the foregoing implementation manner, in a seventh implementation manner of the first aspect, the ONU supports a downlink 10G/uplink 2.5G working mode, and further supports a downlink 10G/uplink 1G, At least one of a downlink 10G/upstream 10G and a downlink 1G/uplink 1G.

The second aspect provides a communication method, including: an optical network unit ONU receives an uplink 2.5G discovery window message sent by an optical line terminal OLT, where the ONU supports an uplink 2.5G; and the ONU finds according to the uplink 2.5G. The window message sends a registration request message to the OLT; the ONU receives a registration message sent by the OLT according to the registration request message, where the registration message includes a logical link identifier LLID allocated by the OLT to the ONU; Said ONU to said

The OLT sends a registration success message.

With reference to the second aspect, in a first implementation manner of the second aspect, the initial working mode of the ONU is an uplink 2.5G, and the registration request message includes: an capability field for indicating that the ONU supports an uplink 2.5G And a request field for indicating that the ONU is currently requesting registration as an uplink 2.5G.

With reference to the second aspect and the foregoing implementation manner, in a second implementation manner of the second aspect, the initial working mode of the ONU is uplink 1G, and the ONU sends the uplink 2.5G discovery window message to the OLT according to the uplink Before the registration request message, the method further includes: switching the working mode to the uplink 2.5G according to the uplink 2.5G discovery window message; and generating a registration request message carrying the capability field and the request field, where the capability field indicates that the ONU is simultaneously Supporting uplink 1G and uplink 2.5G, the request field indicates that the ONU currently requests registration as an uplink 2.5G.

In conjunction with the second aspect and the foregoing implementation manner, in a third implementation manner of the second aspect, the registration message includes an LLID, a synchronization time, and an upper limit of a laser switch time allocated by the OLT to the ONU.

With reference to the second aspect and the foregoing implementation manner, in a fourth implementation manner of the second aspect, after the ONU sends the registration success message to the OLT, the method further includes: performing, on the logical link corresponding to the LLID The OLT performs maximum downlink 10G/uplink 2.5G data transmission.

With reference to the second aspect and the foregoing implementation manner, in a fifth implementation manner of the second aspect, before the optical network unit ONU receives the uplink 2.5G discovery window message sent by the optical line terminal OLT, the method further includes: receiving, by the OLT, An uplink 1G discovery window message is sent to the OLT according to the uplink 1G discovery window message, where the registration request message includes an capability field for indicating that the ONU supports uplink 1G, and is used to indicate that the ONU is currently Requesting registration as an uplink 1G request field; receiving a registration message sent by the OLT according to the registration request message, the registration message includes an LLID assigned by the OLT to the ONU; sending a registration success message to the OLT, The registration of the ONU uplink 1G is completed. With reference to the second aspect and the foregoing implementation manner, in a sixth implementation manner of the second aspect, after the sending the registration success message to the OLT, the method further includes: receiving, by the OLT, a query for querying the ONU And the OLT sends a response message for indicating that the ONU supports the uplink 1G and the uplink 2.5G; and receives an indication message sent by the OLT to indicate that the ONU switches to the uplink 2.5G working mode; Switching to the uplink 2.5G working mode according to the indication message and recording the current working mode as 2.5G; waiting for the uplink 2.5G discovery window message sent by the OLT after the offline reset and online again.

With reference to the second aspect and the foregoing implementation manner, in the seventh implementation manner of the second aspect, the ONU supports a downlink 10G/uplink 2.5G working mode, and further supports downlink 10G/uplink 1G, downlink 10G/uplink 10G. And at least one of the downlink 1G/uplink 1G modes of operation.

The third aspect provides an optical line terminal, including: a sending unit, configured to send an uplink 2.5G discovery window message, and a receiving unit, configured to receive, by the optical network unit ONU supporting the uplink 2.5G, according to the discovery window message. a registration request message; the sending unit is configured to send a registration message to the ONU, where the registration message includes a logical link identifier LLID allocated by the OLT to the ONU; the receiving unit is configured to receive the sending by the ONU Registration success message.

With reference to the third aspect, in a first implementation manner of the third aspect, the initial working mode of the ONU is an uplink 2.5G, and the receiving request message received by the receiving unit includes: a capability field of 2.5G; and a request field for indicating that the ONU is currently requesting registration as an uplink 2.5G.

With reference to the third aspect and the foregoing implementation manner, in a second implementation manner of the third aspect, the initial working mode of the ONU is an uplink 1G, and the receiving request message received by the receiving unit includes: The ONU supports both the uplink 1G and uplink 2.5G capability fields; and a request field for indicating that the ONU is currently requesting registration as an uplink 2.5G.

With reference to the third aspect and the foregoing implementation manner, in a third implementation manner of the third aspect, the optical line terminal further includes a determining unit, where the determining unit is configured to: according to the capability field of the registration request message And the request field, determining an LLID, a synchronization time, and a laser switch time upper limit allocated to the ONU; generating a registration message including the LLID, the synchronization time, and the laser switch time upper limit.

With reference to the third aspect and the foregoing implementation manner, in a fourth implementation manner of the third aspect, the sending unit and the receiving unit are further configured to: perform, on the logical link corresponding to the LLID, with the ONU Maximum downlink 10G/uplink 2.5G data transmission. With the third aspect and the foregoing implementation manner, in a fifth implementation manner of the third aspect, the initial working mode of the ONU is an uplink 1G, and the sending unit is further configured to: send an uplink 1G discovery window message; The receiving unit is further configured to receive a registration request message that is sent by the ONU according to the uplink 1G discovery window message, where the registration request message includes an capability field for indicating that the ONU supports the uplink 1G, and is used to indicate that the ONU is currently Requesting to register as a request field of the uplink 1G; the sending unit is further configured to send a registration message to the ONU, where the registration message includes a logical link identifier LLID allocated by the OLT to the ONU; Receiving a registration success message sent by the ONU to complete registration of the ONU uplink 1G.

With the third aspect and the foregoing implementation manner, in a sixth implementation manner of the third aspect, the sending unit is further configured to: send a query message to the ONU, so as to query an uplink sending capability of the ONU; The receiving unit receives a response message sent by the ONU, where the response message indicates that the ONU supports the uplink 1G and the uplink 2.5G; and sends an indication message to the ONU to indicate that the ONU switches to the uplink 2.5G working mode. So that the ONU switches to the uplink 2.5G working mode and records the current working mode as 2.5G and the offline reset, so that the ONU receives the 2.5G registration when the uplink 2.5G discovery window sent by the OLT is received.

In combination with the third aspect and the foregoing implementation manner, in the seventh implementation manner of the third aspect, the ONU supports a downlink 10G/uplink 2.5G working mode, and further supports downlink 10G/uplink 1G, downlink 10G/uplink 10G. And at least one of the downlink 1G/uplink 1G modes of operation.

The fourth aspect provides an optical network unit, including: a receiving unit, configured to receive an uplink 2.5G discovery window message sent by an optical line terminal OLT, where the ONU supports an uplink 2.5G, and a sending unit, configured to The uplink 2.5G discovery window message sends a registration request message to the OLT; the receiving unit is configured to receive a registration message sent by the OLT according to the registration request message, where the registration message includes the OLT assigning to the ONU The logical link identifies the LLID; the sending unit is configured to send a registration success message to the OLT.

With reference to the fourth aspect, in a first implementation manner of the fourth aspect, the initial working mode of the ONU is an uplink 2.5G, and the registration request message includes: an capability field for indicating that the ONU supports an uplink 2.5G And a request field for indicating that the ONU is currently requesting registration as an uplink 2.5G.

With reference to the fourth aspect and the foregoing implementation manner, in a second implementation manner of the fourth aspect, the initial working mode of the ONU is an uplink 1G, where the ONU further includes a switching unit and a generating unit, where the switching unit is used by : Switching the working mode to uplink according to the uplink 2.5G discovery window message 2.5G; and the generating unit is configured to generate a registration request message carrying a capability field and a request field, where the capability field indicates that the ONU supports both uplink 1G and uplink 2.5G, and the request field indicates that the ONU is currently Request to register as an upstream 2.5G.

In conjunction with the fourth aspect and the foregoing implementation manner, in a third implementation manner of the fourth aspect, the registration message includes an LLID, a synchronization time, and an upper limit of a laser switch time allocated by the OLT to the ONU.

With reference to the fourth aspect and the foregoing implementation manner, in a fourth implementation manner of the fourth aspect, the sending unit and the receiving unit are further configured to: perform, on the logical link corresponding to the LLID, with the OLT Maximum downlink 10G / uplink 2.5G data transmission.

With reference to the fourth aspect and the foregoing implementation manner, in a fifth implementation manner of the fourth aspect, the receiving unit is further configured to: receive an uplink 1G discovery window message sent by the OLT; The uplink 1G discovery window message sends a registration request message to the OLT, where the registration request message includes a capability field for indicating that the ONU supports the uplink 1G, and a request for indicating that the ONU currently requests to register as the uplink 1G. The receiving unit is further configured to receive a registration message that is sent by the OLT according to the registration request message, where the registration message includes an LLID that is allocated by the OLT to the ONU, and the sending unit is further configured to The OLT sends a registration success message to complete the registration of the ONU uplink 1G.

With reference to the fourth aspect and the foregoing implementation manner, in a sixth implementation manner of the fourth aspect, the ONU further includes a recording unit and a reset unit, where the receiving unit is further configured to: receive the OLT sent for query And the sending unit is further configured to send, to the OLT, a response message for indicating that the ONU supports the uplink 1G and the uplink 2.5G, where the sending unit is further configured to receive the An indication message sent by the OLT to indicate that the ONU switches to an uplink 2.5G working mode; the recording unit is configured to switch to an uplink 2.5G working mode according to the indication message and record a current working mode of 2.5G; After the offline is reset and goes online again, the uplink 2.5G discovery window message sent by the OLT is awaited.

With reference to the fourth aspect and the foregoing implementation manner, in the seventh implementation manner of the fourth aspect, the ONU supports a downlink 10G/uplink 2.5G working mode, and further supports downlink 10G/uplink 1G, downlink 10G/uplink 10G. And at least one of the downlink 1G/uplink 1G modes of operation.

The fifth aspect provides an Ethernet passive optical network system, including: an optical line terminal, an optical connection, where the optical line terminal includes any optical line terminal according to the foregoing third aspect, The optical network unit includes any one of the optical network units as described in the above fourth aspect.

The communication method of the Ethernet passive optical network in the embodiment of the present invention opens an uplink 2.5G discovery window to the ONU through the OLT, so that the ONU supporting the uplink 2.5G can complete the registration, and works in the downlink 10G/upstream 2.5G, providing a higher Uplink rate/bandwidth, which improves the user experience. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

1 is a block diagram of an Ethernet passive optical network system according to an embodiment of the present invention;

2 is a flow chart of a communication method of an Ethernet passive optical network according to an embodiment of the present invention; FIG. 3 is a flowchart of a communication method of an Ethernet passive optical network according to an embodiment of the present invention; A flowchart of online registration of an optical network unit of an embodiment;

FIG. 5 is a flowchart of online registration of an optical network unit according to an embodiment of the present invention; FIG.

6 is a flow chart of online registration of an optical network unit according to an embodiment of the present invention;

7 is a flow chart of online registration of an optical network unit according to an embodiment of the present invention;

Figure 8 is a schematic block diagram of an optical line terminal in accordance with one embodiment of the present invention;

9 is a schematic block diagram of an optical network unit according to an embodiment of the present invention;

Figure 10 is a schematic block diagram of an optical line terminal according to another embodiment of the present invention;

11 is a schematic block diagram of an optical network unit in accordance with another embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative labor are within the scope of the present invention.

1 is a block diagram of an Ethernet passive optical network system according to an embodiment of the present invention.

The Ethernet Passive Optical Network (EPON) system usually consists of an optical line terminal (OLT) at the central office, an optical distribution network (ODN), and an optical network terminal at the user end. Network Terminal, ONT) / Optical Network Unit (ONU). For the sake of the unit, it is called ONU.

The 10G EPON OLT can access and control multiple types of ONUs through the Multi-Point Control Protocol (MPCP), that is, support downlink 1G/uplink 1G, downlink 10G/uplink 1G, downlink 10G/uplink 2.5G. And access and control of the downstream 10G/upstream 10G ONU. An ONU can support one or more of the above four modes of operation. Generally speaking, an ONU that supports multiple working modes will determine and maintain a working mode with the OLT when registering online. The ONU working mode switching needs to be reset by the ONU and re-registered for another working mode. It is also possible to initiate a special working mode switching process by the OLT when the ONU is online, so that the ONU completes the switching of the working mode.

FIG. 1 is a block diagram showing an architecture of an EPON system according to an embodiment of the present invention, including an OLT ODN, a legacy ONU (downlink 1G/uplink 1G), a downlink 10G/uplink 1G, and a downlink 10G/uplink 2.5G dual working mode ONU. And downlink 10G / uplink 10G ONU and so on. It should be understood that the ONU can support at least one of the above four working modes, that is, the ONUs in the actual EPON system are not limited to the three types shown in FIG. 1, and the actual EPON system can have multiple supporting different working modes. The ONU combined with the working mode is not limited by the present invention.

As shown in the figure, the downlink rate of the OLT to the ONU is 10.3125G, the wavelength is 1577nm, the uplink speed of the EPON ONU to the OLT is 1.25G, the wavelength is 1310nm, and the downlink 10G/uplink 1G and downlink 10G/uplink 2.5G dual work The uplink rate of the mode ONU to the OLT is 1.25G or 2.5G (depending on the current working mode of the ONU), and the wavelengths of the two working modes are 1310.

An ONU that supports the downstream 10G/uplink 2.5G mode of operation, because its operating wavelength is still 1310nm, the laser of its optical module can use a lower cost laser, such as Fabry-Perot Laser (FP) or distribution. Display Feedback Laser (DFB) and so on.

The OLT implements access and control of multiple types of ONUs through MPCP, so access and control are implemented for the downlink uplink 2.5G ONU.

The downlink 10G/uplink 1G and downlink 10G/uplink 2.5G dual working mode ONUs can switch the working mode according to actual service requirements or OLT control. 2 is a flow chart of a communication method of an Ethernet passive optical network according to an embodiment of the present invention. The method of Figure 2 is performed by an optical line termination OLT.

201. The OLT sends an uplink 2.5G discovery window message.

202. The OLT receives a registration request message that is sent by the ONU according to the discovery window message.

203. The OLT sends a registration message to the ONU, where the registration message includes a logical link identifier LLID assigned by the OLT to the ONU.

204. The OLT receives a registration success message sent by the ONU.

The communication method of the Ethernet passive optical network in the embodiment of the present invention opens an uplink 2.5G discovery window to the ONU through the OLT, so that the ONU supporting the uplink 2.5G can complete the registration, and works in the downlink 10G/upstream 2.5G, providing a higher Uplink rate/bandwidth, which improves the user experience.

Optionally, as an embodiment, the initial working mode of the ONU is an uplink 2.5G, and the registration request message received by the OLT includes: an capability field for indicating that the ONU supports the uplink 2.5G; and indicating that the ONU currently requests to register as Upstream 2.5G request field.

Specifically, the ONU needs to complete the discovery and registration process. The OLT periodically or irregularly opens the discovery window, that is, broadcasts a discovery window message to the ONU, and provides an opportunity for the ONU that has not been registered yet to register. Here, the OLT sends an uplink 2.5G discovery window message, which means that the ONU registration of the uplink 2.5G is allowed. The ONU can be an ONU of the downlink 10G/uplink 2.5G, or an ONU of the multi-operation mode supporting the uplink 2.5G. When the initial default working mode is downlink 10G/uplink 2.5G, when receiving the uplink 2.5G discovery window message of the OLT, the ONU supporting the uplink 2.5G may send a registration request message to the OLT to respond to the discovery window message and to the OLT. Instructing it to perform access registration, that is, the registration request message may include a capability field indicating that the ONU supports the uplink 2.5G and a request field for requesting registration, and more specifically, may be in the registration request message (Register_Req) of the MPCP. The extension field is indicated to the OLT.

Optionally, as an embodiment, the initial working mode of the ONU is uplink 1G, and the registration request message received by the OLT includes: an capability field for indicating that the ONU supports both the uplink 1G and the uplink 2.5G; and is used to indicate the current ONU Request to register as an uplink 2.5G request field.

Here, the ONU is an ONU that supports a multi-operation mode of downlink 10G/uplink 2.5G, that is, while supporting 2.5G, it can also support other working modes such as downlink 1G/uplink 1G and downlink 10G/uplink 10G. In the case where the initial default working mode of the ONU is downlink 10G/uplink 1G, When receiving the uplink 2.5G discovery window message of the OLT, the multi-working mode ONU supporting the uplink 2.5G may send a registration request message to the OLT in response to the discovery window message and indicate to the OLT that it wishes to perform access registration, that is, The registration request message may include a capability field indicating that the ONU supports the uplink 2.5G and other working modes, and a request field requesting uplink 2.5G registration, and more specifically, may be extended by an extension field in the registration request message (Register_Req) of the MPCP. Indicated by the OLT. It should be understood that after the ONU that works by default in the uplink 1G receives the 2.5G discovery window, the ONU can switch the working mode to 2.5G according to the 2.5G discovery window, so as to have a 2.5G uplink rate during the subsequent registration interaction. Communicate with the OLT.

Optionally, as an embodiment, after step 202, the method further includes: determining, according to the capability field and the request field of the registration request message, an LLID, a synchronization time, and a laser switch time upper limit allocated to the ONU; generating the LLID, the synchronization time, and the laser Registration message for the upper limit of the switch time. After receiving the registration request message, the OLT can allocate an LLID to the ONU according to the message, that is, assign a logical link to the ONU, and further send a synchronization time and a laser switch time upper limit to the ONU through the message, so as to complete the ONU and the OLT. Synchronous calibration, and limiting the upper limit of the ONU laser switching time, to avoid the upstream transmission of the ONU conflict with the uplink transmission of other ONUs, improving efficiency.

Optionally, as an embodiment, after the step 204, the method further includes: performing a maximum downlink 10G/uplink 2.5G data transmission with the ONU on the logical link corresponding to the LLID.

Specifically, after receiving the LLID allocated by the OLT, the ONU can store the LLID in the register of the ONU. The logical link between the ONU and the OLT is successfully established, and then the ONU can successfully send the registration to the OLT through the logical link. The message (Register_Ack), after receiving the acknowledgment message, the OLT indicates that the registration process of the ONU has been completed, and the ONU performs data transmission at a maximum uplink rate of 2.5G through the logical link according to the uplink transmission authorization given by the OLT in the subsequent process.

Optionally, as an embodiment, the initial working mode of the ONU is uplink 1G, and before step 201, the method further includes: sending an uplink 1G discovery window message; receiving a registration request message sent by the ONU according to the uplink 1G discovery window message, where the registration request message includes The capability field for indicating that the ONU supports the uplink 1G and the request field for indicating that the ONU currently requests to register as the uplink 1G; sending a registration message to the ONU, where the registration message includes the logical link identifier LLID assigned by the OLT to the ONU; receiving the registration sent by the ONU A success message to complete the registration of the ONU upstream 1G.

For an ONU with multiple working modes, you can register with the working mode of the above 1G, that is, In response to the uplink 1G discovery window message sent by the OLT, the LLID assigned by the OLT is accepted, the 1G registration is completed, and data transmission is performed at an uplink rate of 1 GG on the logical link corresponding to the LLID. Then, in step 201, when the ONU receives the uplink 2.5G discovery window message sent by the OLT, it can determine whether to switch to the working mode of the uplink 2.5G according to the actual service requirement, and if it is determined to perform the handover, respond to the uplink 2.5G discovery window message. To complete the uplink 2.5G registration, if the current working mode is maintained, the uplink 2.5G discovery window message may not be responded to.

Optionally, as an embodiment, after the step 204, the method further includes: sending an inquiry message to the ONU, so as to query the uplink transmission capability of the ONU; receiving a response message sent by the ONU, and the response message indicates that the ONU supports the uplink 1G and the uplink 2.5G; The ONU sends an indication message for instructing the ONU to switch to the uplink 2.5G working mode, so that the ONU switches to the uplink 2.5G working mode and records the current working mode as 2.5G and the offline reset, so that the ONU receives the uplink 2.5 sent by the OLT. When G finds the window, it will register 2.5G above.

The ONU of the multi-work mode is first registered in the working mode of the upper-layer 1G, and then the OLT can initiate an uplink capability query to check whether the uplink rate of the ONU is consistent with the rate configured by the user. Specifically, the uplink transmission capability query message may be sent to the ONU by using the Operation Administration and Maintenance (OAM) function, and then the ONU of the multi-work mode sends the supported uplink transmission capability to the OLT through a response message, for example, indicating to the OLT. The ONU supports the uplink 1G and the uplink 2.5G. After receiving the response message, the OLT can instruct the ONU to switch to the uplink 2.5G working mode. After receiving the indication from the OLT, the ONU can record the current working mode as 2.5G uplink. After obtaining the OLT confirmation, it can switch to the working mode of the uplink 2.5G, and reset the device to make the ONU go offline. After the ONU reset is completed, when the uplink 2.5G discovery window sent by the OLT is received, the response is completed and the uplink 2.5G registration is completed. At this point, the ONU is completed by the process of switching from the upstream 1G to the upstream 2.5G. In addition, after the ONU uplink 2.5G registration is completed, the OLT may further initiate an uplink capability query to determine whether the current uplink rate of the ONU is consistent with the rate configured by the user, which is not limited by the present invention.

Optionally, as an embodiment, the ONU supports a downlink 10G/uplink 2.5G working mode, and further supports at least one of a downlink 10G/uplink 1G, a downlink 10G/uplink 10G, and a downlink 1G/uplink 1G.

The communication method of the Ethernet passive optical network in the embodiment of the present invention opens an uplink 2.5G discovery window to the ONU through the OLT, so that the ONU supporting the uplink 2.5G can complete the registration, and works in the downlink 10G/upstream 2.5G, providing a higher Uplink rate/bandwidth, which improves the user experience. In addition, the optical module of the downlink 10G/uplink 2.5G ONU has a low cost, and can form a multi-mode ONU together with a working mode such as a downlink 10G/uplink 1G, and can switch between working modes according to different needs, and is easy to implement and popularize.

3 is a flow chart of a communication method of an Ethernet passive optical network according to an embodiment of the present invention. The method of Figure 3 is performed by the optical network unit ONU.

301. The ONU receives the uplink 2.5G discovery window message sent by the optical line terminal OLT, where the ONU supports the uplink 2.5G.

302. The ONU sends a registration request message to the OLT according to the uplink 2.5G discovery window message.

303. The ONU receives a registration message sent by the OLT according to the registration request message, where the registration message includes a logical link identifier LLID allocated by the OLT to the ONU.

304. The ONU sends a registration success message to the OLT.

Optionally, as an embodiment, the initial working mode of the ONU is an uplink 2.5G, and the registration request message includes: an capability field for indicating that the ONU supports the uplink 2.5G; and an indication that the ONU currently requests to register as the uplink 2.5G. Request field.

Specifically, to access the ONU in the network, the discovery and registration process is completed. The discovery module in the OLT periodically or irregularly opens the discovery window, that is, broadcasts a discovery window message to the ONU, and provides registration for the ONU that has not been registered yet. chance. Here, the OLT sends an uplink 2.5G discovery window message, that is, it allows the ONU to support the uplink 2.5G. The ONU can be an ONU of the downlink 10G/uplink 2.5G, or an ONU that supports the uplink 2.5G. When the initial default working mode is downlink 10G/uplink 2.5G, when receiving the uplink 2.5G discovery window message of the OLT, the ONU supporting the uplink 2.5G may send a registration request message to the OLT to respond to the discovery window message and to the OLT. Instructing it to perform access registration, that is, the registration request message may include a capability field indicating that the ONU supports the uplink 2.5G and a request field requesting registration, and more specifically, may be in the registration request message (Register_Req) of the MPCP. The extension field is indicated to the OLT.

Optionally, as an embodiment, the initial working mode of the ONU is uplink 1G. Before step 302, the method further includes: switching the working mode to the uplink 2.5G according to the uplink 2.5G discovery window message; and generating the carried capability field and the request field. Registration request message, where the capability field indicates ONU Supporting both upstream 1G and upstream 2.5G, the request field indicates that the ONU is currently requesting registration as an upstream 2.5G.

Here, the ONU is an ONU that supports the downlink 10G/uplink 2.5G multi-operation mode, that is, while supporting 2.5G, it can also support other working modes such as downlink 1G/uplink 1G and downlink 10G/uplink 10G. In the case that the initial default working mode of the ONU is downlink 10G/uplink 1G, when receiving the uplink 2.5G discovery window message of the OLT, the multi-operation mode ONU supporting the uplink 2.5G may send a registration request message to the OLT to respond to the discovery. Window message and indicating to the OLT that it wishes to perform access registration, that is, the registration request message may include a capability field indicating that the ONU supports uplink 2.5G and other working modes, and a request field requesting uplink 2.5G registration, more specifically , can be indicated to the OLT through an extension field in the MPCP registration request message (Register_Req). It should be understood that after the ONU that works by default in the uplink 1G receives the 2.5G discovery window, the ONU can switch the working mode to 2.5G according to the 2.5G discovery window, so as to have a 2.5G uplink rate during the subsequent registration interaction. Communicate with the OLT.

Optionally, as an embodiment, the registration message includes an LLID, a synchronization time, and an upper limit of the laser switching time allocated by the OLT to the ONU. After receiving the registration request message, the OLT can allocate an LLID to the ONU according to the message, that is, assign a logical link to the ONU, and also send a synchronization time and a laser switch time upper limit to the ONU through the message, so as to complete the ONU and the OLT. Synchronous calibration, and limiting the upper limit of the ONU laser switching time, to avoid the upstream transmission of the ONU conflict with the uplink transmission of other ONUs, improving efficiency.

Optionally, as an embodiment, after the step 304, the method further includes: performing a maximum downlink 10G/uplink 2.5G data transmission with the OLT on the logical link corresponding to the LLID.

Optionally, as an embodiment, before step 301, the method further includes: receiving an uplink 1G discovery window message sent by the OLT; sending a registration request message to the OLT according to the uplink 1G discovery window message, where the registration request message is used to indicate that the ONU supports the uplink a capability field of 1G and a request field for indicating that the ONU currently requests to register as an uplink 1G; the receiving OLT sends a message according to the registration request message The registration message sent, the registration message includes the LLID assigned by the OLT to the ONU; and the registration success message is sent to the OLT to complete the registration of the ONU uplink 1G.

For the ONUs in the multi-operation mode, you can register in the upper 1G working mode, that is, respond to the uplink 1G discovery window message sent by the OLT, accept the LLID assigned by the OLT, complete the 1G registration, and maximize the logical link corresponding to the LLID. The uplink rate of 1G is used for data transmission. Then, in step 201, when the ONU receives the uplink 2.5G discovery window message sent by the OLT, it can determine whether to switch to the working mode of the uplink 2.5G according to the actual service requirement, and if it is determined to perform the handover, respond to the uplink 2.5G discovery window message. To complete the uplink 2.5G registration, if the current working mode is maintained, the uplink 2.5G discovery window message may not be responded to.

Optionally, as an embodiment, after step 304, the method further includes: receiving, by the OLT, a query message for querying an uplink sending capability of the ONU; and sending, to the OLT, a response message for indicating that the ONU supports the uplink 1G and the uplink 2.5G; Receiving an indication message sent by the OLT indicating that the ONU switches to the uplink 2.5G working mode; switching to the uplink 2.5G working mode according to the indication message and recording the current working mode as 2.5G; after the offline is reset and goes online again, waiting for the uplink 2.5 sent by the OLT G found the window message.

Optionally, as an embodiment, the ONU supports a downlink 10G/uplink 2.5G working mode, and further supports at least one of downlink 10G/uplink 1G, downlink 10G/uplink 10G, and downlink 1G/uplink 1G. Operating mode. The communication method of the Ethernet passive optical network in the embodiment of the present invention opens an uplink 2.5G discovery window to the ONU through the OLT, so that the ONU supporting the uplink 2.5G can complete the registration, and works in the downlink 10G/upstream 2.5G, providing a higher Uplink rate/bandwidth, which improves the user experience. In addition, the optical module of the downlink 10G/uplink 2.5G ONU has a low cost, and can form a multi-mode ONU together with a working mode such as a downlink 10G/uplink 1G, and can switch between working modes according to different needs, and is easy to implement and popularize.

4 is a flow chart of online registration of an optical network unit according to an embodiment of the present invention.

401, uplink 2.5G discovery window message

The OLT will open the discovery window periodically or irregularly, that is, broadcast the discovery window message to the ONU, and provide an opportunity to register for the ONU that has not been registered yet. Here, the OLT sends an uplink 2.5G discovery window message, that is, it allows the ONU registration of the uplink 2.5G to be supported. Specifically, the uplink discovery window message can be implemented by extending the MDPC message:

Table 1

The message format of the uplink 2.5G discovery window by extending the MPCP's discovery window message is exemplarily shown in Table 1. The 0th bit indicates the OLT's receiving capability for the uplink 1G, the 1st bit indicates the OLT's receiving capability for the uplink 10G, and the new 2nd bit indicates the OLT's receiving capability for the uplink 2.5G, where the 2nd bit is A bit value of 1 indicates that the OLT has an uplink 2.5G reception capability. Where US indicates upstream (Up Stream). The OLT can have several receiving capabilities at the same time. For example, it can support receiving uplink 1G, uplink 2.5G, and uplink 10G at the same time, and only needs to set the bit value of the corresponding bit to 1. It should be understood that the above is only a specific example, and the description of the message format is specifically described, and the bit bits that support or do not support some uplink capability are specifically indicated, and the bit value may be pre-agreed, which is not limited by the present invention.

For the discovery window, the fourth bit can indicate that the discovery window message is an uplink 1G discovery window, The 5 bits can indicate that the discovery window message is an uplink 10G discovery window, and the newly added 6th bit can indicate that the discovery window message is an uplink 2.5G discovery window. Generally, the OLT sends a discovery window message only for opening one type. The discovery window, where the bit value of the 6th bit is 1 indicates that the discovery window message is an upstream 2.5G discovery window. It should be understood that the above is only a specific example, which facilitates the description of the message format, and specifically indicates that the bit type of the discovery window type and the bit value can be pre-agreed, which is not limited by the present invention.

402, registration request message

Upon receiving the uplink 2.5G discovery window message of the OLT, the ONU supporting the uplink 2.5G may send a registration request message to the OLT in response to the discovery window message. The ONU here supports uplink 2.5G, for example, uplink 1G. The current working mode of the ONU is downlink 10G/uplink 2.5G. The working mode can be the default/initialized working mode of the ONU, that is, after the ONU is started, or after reset, the default line 10G/uplink 2.5G mode works. After receiving the uplink 2.5G discovery window message of the OLT, the ONU generates a registration request message, where the message specifically includes an capability field for indicating that the ONU supports both the uplink 1G and the uplink 2.5G, and is used to indicate that the ONU currently requests to register as the uplink 2.5. G's request field. More specifically, it can be implemented by extending the MPCP registration request message:

Table 2

Table 2 exemplarily shows that the registration request of the uplink 2.5G is implemented by extending the registration request message message Register_Req of the MPCP. For the capability field, the 0th bit indicates the ONU's transmission capability for the uplink 1G, the 1st bit indicates the ONU's transmission capability for the uplink 10G, and the new 2nd bit indicates the ONU's transmission capability for the uplink 2.5G. A bit value of 1 indicates that the ONU has an uplink 2.5G transmission capability. Where US indicates upstream (Up Stream). Multi-mode ONUs can have several uplink transmission capabilities at the same time, for example To support both uplink 1G, uplink 2.5G, and uplink 10G, it is only necessary to set the bit value of the corresponding bit to 1. It should be understood that the above is only a specific example, which is convenient for describing the message format, specifically indicating a bit that supports or does not support a certain uplink capability, and the bit value may be pre-agreed, which is not limited by the present invention.

For the request field, the 4th bit may indicate that the registration request is an uplink 1G registration request, and the 5th bit may indicate that the registration request is an uplink 10G registration request, and the added 6th bit may indicate that the registration request is an uplink 2.5G request. The registration request, usually, the ONU only requests registration as an uplink mode when registering once, where the bit value of the 6th bit is 1 indicating that the ONU requests registration as the uplink 2.5G. It should be understood that the above is only a specific example, which facilitates the description of the message format, and specifically indicates that the bit of the registration request and the bit value can be pre-agreed, which is not limited by the present invention.

It should be understood that when the ONU receives the discovery window message, it needs to feed back the registration request message to the OLT within the discovery window time. Because in a discovery window, more than 4 ONUs that are not registered and meet the discovery window condition can send a registration request message to the OLT, so that an uplink conflict may occur, so in order to reduce the probability of uplink conflict, the registration success is shortened. At the time, the ONU can be randomly delayed for a period of time before sending the registration request message.

403, registration message

After receiving the registration request message, the OLT may allocate an LLID to the ONU according to the registration request message, that is, assign a logical link to the ONU, and send the LLID to the ONU through a registration message (Register). In addition, the OLT can also send the synchronization time and the laser switch time upper limit to the ONU through the registration message, so as to complete the synchronous calibration of the ONU and the OLT, and limit the upper limit of the ONU laser switching time, and avoid the uplink transmission of the ONU and the uplink transmission of other ONUs. Conflicts occur and efficiency is increased.

It should be understood that after the OLT sends the discovery window message, the OLT may successfully receive the registration request message of multiple ONUs, and the OLT may process according to the order in which the multiple registration request messages arrive.

404, registration success message

After receiving the registration message in step 403, the ONU extracts the LLID and caches it in the register. At this point, the logical link corresponding to the LLID between the ONU and the OLT is successfully established. The ONU can send a registration success message (Register_Ack) to the OLT through the logical link. After receiving the confirmation message, the OLT indicates that the registration process of the ONU is completed, and the ONU passes the LLID according to the uplink transmission authorization given by the OLT in the subsequent process. Corresponding logical link with a maximum of 2.5G The uplink rate is used for data transmission.

The optical module of the ONU in the multi-operation mode of the embodiment of the present invention supports multiple working modes of uplink 1G and uplink 2.5G. When the ONU is in the uplink 1G or uplink 2.5G working mode, the transmitting wavelength is 1310nm, and the ONU media is connected. The line coding and protocol of the Media Access Control (MAC) chip/module can be defined by the existing EPON standard. The MAC chip/module of the ONU can be configured to work at various rates such as uplink 1G and uplink 2.5G. The OLT optical module supports multiple rates of uplink 1G and uplink 2.5G, and can complete 1G/2.5G optical signal processing. The OLT MAC chip/module has different processing channels for different uplink rates, for example, with uplink 1G. And the uplink 2.5G two independent channels, after the OLT module receives the uplink 1G and the uplink 2.5G optical signals at the same time, the MAC chip/module can internally use the signal replication to distribute the signals to the uplink 1G and the uplink 2.5G channels. To complete the line decoding and protocol processing of the two signals separately.

The communication method of the Ethernet passive optical network in the embodiment of the present invention opens an uplink 2.5G discovery window to the ONU through the OLT, so that the ONU supporting the uplink 2.5G can complete the registration, and works in the downlink 10G/upstream 2.5G, providing a higher Uplink rate/bandwidth, which improves the user experience. Moreover, the optical module of the downlink 10G/uplink 2.5G ONU has a low cost, and can form a multi-mode ONU together with the downlink 10G/upstream 1G working mode, and the working mode is switched according to different needs, which is easy to implement and popularize.

FIG. 5 is a flow chart of online registration of an optical network unit according to an embodiment of the present invention.

501, default uplink 1G working mode

The ONU here is a multi-mode ONU that supports uplink 1G and uplink 2.5G. The current working mode of the ONU is downlink 10G/uplink 1G. The working mode can be the default/initialized working mode of the ONU, that is, after the ONU is started, or after reset, the following 10G/uplink 1G mode is disabled.

502, uplink 2.5G discovery window message

The OLT will open the discovery window periodically or irregularly, that is, broadcast the discovery window message to the ONU, and provide an opportunity to register for the ONU that has not been registered yet. Here, the OLT sends an uplink 2.5G discovery window message, that is, it allows the ONU registration of the uplink 2.5G to be supported. Specifically, the uplink discovery window message can be implemented by extending the MDPC message, which is similar to the discovery window message in step 401 above. , will not repeat them here.

503, working mode switching

By default, the multi-mode ONU working on the upstream 1G receives the uplink 2.5G discovery window message. According to actual business needs, or user selection, it is determined whether to respond to the discovery window message, that is, whether the above 2.5G work is required. If it is determined that it is to be registered as the uplink 2.5G, the Media Access Control (MAC) chip/module of the ONU switches from the uplink 1G to the uplink 2.5G working mode.

504, registration request message

After switching to the upstream 2.5G, the ONU may generate a registration request message and send the registration request message to the OLT in response to the discovery window message. The message specifically includes an capability field for indicating that the ONU supports both uplink 1G and uplink 2.5G, and a request field for indicating that the ONU currently requests to register as the uplink 2.5G. More specifically, it may be implemented by extending the registration request message of the MPCP, which is similar to the registration request message in the above step 402, and details are not described herein again.

505, registration message

506, registration success message

After receiving the registration message in step 505, the ONU extracts the LLID and caches it in the register. At this point, the logical link corresponding to the LLID between the ONU and the OLT is successfully established. The ONU can send a registration success message (Register_Ack) to the OLT through the logical link. After receiving the confirmation message, the OLT indicates that the registration process of the ONU is completed, and the ONU passes the LLID according to the uplink transmission authorization given by the OLT in the subsequent process. The corresponding logical link transmits data at an uplink rate of up to 2.5G. The optical module of the ONU in the multi-operation mode of the embodiment of the present invention supports multiple working modes of uplink 1G and uplink 2.5G. When the ONU is in the uplink 1G or uplink 2.5G working mode, the transmitting wavelength is 1310nm, and the ONU media is connected. The line coding and protocol of the Media Access Control (MAC) chip/module can be defined by the existing EPON standard. The MAC chip/module of the ONU can be configured to work at various rates such as uplink 1G and uplink 2.5G. The OLT optical module supports multiple rates of uplink 1G and uplink 2.5G, and can complete 1G/2.5G optical signal processing. The OLT MAC chip/module has different processing channels for different uplink rates, for example, with uplink 1G. And the uplink 2.5G two independent channels, after the OLT module receives the uplink 1G and the uplink 2.5G optical signals at the same time, the MAC chip/module can internally use the signal replication to distribute the signals to the uplink 1G and the uplink 2.5G channels. To complete the line decoding and protocol processing of the two signals separately.

6 is a flow chart of online registration of an optical network unit according to an embodiment of the present invention.

601, default uplink 1G working mode

602, uplink 1G discovery window message

The OLT will open the discovery window periodically or irregularly, that is, broadcast the discovery window message to the ONU, and provide an opportunity to register for the ONU that has not been registered yet. Here, the OLT sends an uplink 1G discovery window message, which means that ONU registration of the uplink 1G is allowed.

603, registration request message

After receiving the uplink 1G discovery window message, the ONU may generate a registration request message and send the registration request message to the OLT to respond to the discovery window message.

604, registration message

After receiving the registration request message, the OLT may allocate the ONU according to the registration request message. LLID, which assigns a logical link to the ONU, and sends the LLID to the ONU through a registration message (Register). In addition, the OLT can also send the synchronization time and the laser switch time upper limit to the ONU through the registration message, so as to complete the synchronous calibration of the ONU and the OLT, and limit the upper limit of the ONU laser switching time, and avoid the uplink transmission of the ONU and the uplink transmission of other ONUs. Conflicts occur and efficiency is increased.

605, registration success message

After receiving the registration message in step 604, the ONU extracts the LLID and caches it in the register. At this point, the logical link corresponding to the LLID between the ONU and the OLT is successfully established. The ONU can send a registration success message (Register_Ack) to the OLT through the logical link. After receiving the confirmation message, the OLT indicates that the registration process of the ONU is completed, and the ONU passes the LLID according to the uplink transmission authorization given by the OLT in the subsequent process. The corresponding logical link performs data transmission at an uplink rate of up to 1G.

606, ONU uplink capability query

For an already registered ONU, the OLT can initiate an uplink capability query to check whether the uplink rate of the ONU is consistent with the rate configured by the user. Specifically, for the ONU that has completed the uplink 1G registration in step 605, the OLT may send an uplink sending capability query message to the ONU, instructing the ONU to report its uplink capability, and information such as user configuration and service requirements.

607, uplink capability report

After receiving the uplink capability query message, the ONU can report its uplink capability to the OLT. For example, the ONU supports the ONU to support uplink 1G and uplink 2.5G. In addition, the information about the user configuration and service requirements can be used. For example, the ONU currently works on the uplink 1G, but the user configures the working mode to be 2.5G uplink, or the upstream service requires 2.5G uplink rate.

608, switch to uplink 2.5G

After receiving the uplink capability report of the ONU, the OLT can instruct the ONU to switch to the working mode of the uplink 2.5G. After receiving the indication from the OLT, the ONU can record the current working mode as 2.5G uplink. After obtaining the OLT confirmation, it can switch to the uplink 2.5G working mode and reset the device to make the ONU go offline.

609, uplink 2.5G registration

After the ONU is reset and re-online, its working mode is already 2.5G upstream. It can wait for the upstream 2.5G discovery window of the OLT to further complete the registration of the uplink 2.5G. For the subsequent specific process, refer to step 401-step 404 in Figure 4 above. I will not repeat them here. The optical module of the ONU in the multi-operation mode of the embodiment of the present invention supports multiple working modes of uplink 1G and uplink 2.5G. When the ONU is in the uplink 1G or uplink 2.5G working mode, the transmitting wavelength is 1310nm, and the ONU media is connected. The line coding and protocol of the Media Access Control (MAC) chip/module can be defined by the existing EPON standard. The MAC chip/module of the ONU can be configured to work at various rates such as uplink 1G and uplink 2.5G. The OLT optical module supports multiple rates of uplink 1G and uplink 2.5G, and can complete 1G/2.5G optical signal processing. The OLT MAC chip/module has different processing channels for different uplink rates, for example, with uplink 1G. And the uplink 2.5G two independent channels, after the OLT module receives the uplink 1G and the uplink 2.5G optical signals at the same time, the MAC chip/module can internally use the signal replication to distribute the signals to the uplink 1G and the uplink 2.5G channels. To complete the line decoding and protocol processing of the two signals separately.

FIG. 7 is a flow chart of online registration of an optical network unit according to an embodiment of the present invention.

701, default uplink 1G working mode

702, uplink 1G discovery window message

703, registration request message

704, registration message

705, registration success message

706, ONU uplink capability query

For an already registered ONU, the OLT can initiate an uplink capability query to check whether the uplink rate of the ONU is consistent with the rate configured by the user. Specifically, for the ONU that has completed the uplink 1G registration in step 705, the OLT may send an uplink sending capability query message to the ONU, instructing the ONU to report its uplink capability, and information such as user configuration and service requirements.

707, uplink capability report

708, switch to uplink 2.5G

After receiving the uplink capability report of the ONU, the OLT can instruct the ONU to switch to the working mode of the uplink 2.5G. After receiving the indication from the OLT, the ONU can switch to the working mode of the uplink 2.5G, that is, the media access control (MAC) chip/module of the ONU switches from the uplink 1G to the uplink 2.5G working mode, and the ONU after the handover is completed. A handover success message can be sent to the OLT.

709, setting the upstream bandwidth

After receiving the handover success message sent by the ONU, the OLT needs to increase the upstream bandwidth of the ONU.

(line rate) is set to 2.5G so that it can receive and process correctly from the ONU Upstream data. At this point, the ONU's working mode is switched.

Figure 8 is a schematic block diagram of an optical line terminal in accordance with one embodiment of the present invention. The optical line terminal OLT 800 shown in Fig. 8 includes a transmitting unit 801 and a receiving unit 802.

The sending unit 801 sends an uplink 2.5G discovery window message; the receiving unit 802 receives the support uplink.

The registration request message sent by the ONU of the 2.5G optical network unit ONU according to the discovery window message; the sending unit 801 sends a registration message to the ONU, where the registration message includes the logical link identifier LLID assigned by the OLT to the ONU; and the receiving unit 802 receives the registration success message sent by the ONU. . The discovery window enables the ONU supporting the upstream 2.5G to complete registration and works at downlink 10G/upstream 2.5G, providing higher uplink speed/bandwidth, thereby improving the user experience.

Optionally, as an embodiment, the initial working mode of the ONU is an uplink 2.5G, and the registration request message received by the receiving unit 802 includes: an capability field for indicating that the ONU supports the uplink 2.5G; and is used to indicate the current request of the ONU. Registered as an uplink 2.5G request field.

Specifically, the ONU needs to complete the discovery and registration process, and the OLT 800 periodically or irregularly opens the discovery window, that is, broadcasts a discovery window message to the ONU, which is not yet online. Registered ONUs offer registration opportunities. Here, the OLT sends an uplink 2.5G discovery window message, which means that the ONU registration of the uplink 2.5G is allowed. The ONU can be the ONU of the downlink 10G/uplink 2.5G, or the ONU of the multi-operation mode supporting the uplink 2.5G. When the initial default working mode is downlink 10G/uplink 2.5G, when receiving the uplink 2.5G discovery window message of the OLT, the ONU supporting the uplink 2.5G may send a registration request message to the OLT to respond to the discovery window message and to the OLT. Instructing it to perform access registration, that is, the registration request message may include a capability field indicating that the ONU supports the uplink 2.5G and a request field requesting registration, and more specifically, may be in the registration request message (Register_Req) of the MPCP. The extension field is indicated to the OLT.

Optionally, as an embodiment, the initial working mode of the ONU is uplink 1G, and the receiving unit is

The registration request message received by the 802 includes: an capability field for indicating that the ONU supports both the uplink 1G and the uplink 2.5G; and a request field for indicating that the ONU currently requests to register as the uplink 2.5G.

Optionally, as an embodiment, the OLT 800 further includes a determining unit and a generating unit: the determining unit determines, according to the capability field and the request field of the registration request message, an LLID, a synchronization time, and a laser switching time upper limit allocated to the ONU; Contains registration messages with LLID, synchronization time, and laser switch time cap. After receiving the registration request message, the OLT 800 can allocate an LLID to the ONU according to the message, that is, assign a logical link to the ONU, and also send a synchronization time and a laser switch time upper limit to the ONU through the message, so as to complete the ONU and the OLT. The synchronous calibration of 800 and the upper limit of the ONU laser switching time are limited to avoid the collision between the uplink transmission of the ONU and the uplink transmission of other ONUs, thereby improving efficiency. Optionally, as an embodiment, the sending unit 801 and the receiving unit 802 are further configured to perform maximum downlink 10G/uplink 2.5G data transmission with the ONU on the logical link corresponding to the LLID.

Specifically, after receiving the LLID allocated by the OLT 800, the ONU can store the LLID in the register of the ONU. At this point, the logical link between the ONU and the OLT 800 is successfully established, and then the ONU can pass the logical link to the OLT 800. After the registration success message (Register_Ack) is sent, the OLT 800 receives the confirmation message, indicating that the registration process of the ONU has been completed, and the ONU will use the logical link to uplink the maximum 2.5G in the subsequent process according to the uplink transmission authorization given by the OLT 800. Rate for data transfer. Data transmission refers to transmission and reception, which can be done by the transmitting unit 801 and the receiving unit 802.

Optionally, as an embodiment, the initial working mode of the ONU is uplink 1G, and the sending unit is

The 801 sends an uplink 1G discovery window message. The receiving unit 802 receives the registration request message sent by the ONU according to the uplink 1G discovery window message, where the registration request message includes an capability field for indicating that the ONU supports the uplink 1G, and is used to indicate that the ONU currently requests to register as an uplink. The request unit of the 1G sends the registration message to the ONU, and the registration message includes the logical link identifier LLID assigned by the OLT 800 to the ONU. The receiving unit 802 receives the registration success message sent by the ONU to complete the registration of the ONU uplink 1G.

For the ONU of the multi-operation mode, the operation mode of the uplink 1G can be registered first, that is, in response to the uplink 1G discovery window message sent by the OLT 800, the LLID assigned by the OLT 800 is accepted, and the 1G registration is completed and on the logical link corresponding to the LLID. Data transmission is performed at an uplink rate of up to 1G. Then, in step 201, when the ONU receives the uplink 2.5G discovery window message sent by the OLT 800, it can determine whether to switch to the working mode of the uplink 2.5G according to the actual service demand, and if it is determined to perform the handover, respond to the uplink 2.5G discovery window. The message completes the uplink 2.5G registration, and may not respond to the uplink 2.5G discovery window message if the current working mode is maintained.

Optionally, as an embodiment, the sending unit 801 sends an inquiry message to the ONU, so as to query the uplink sending capability of the ONU. The receiving unit 802 receives the response message sent by the ONU, and the response message indicates that the ONU supports the uplink 1G and the uplink 2.5G. The unit 801 sends an indication message to the ONU for instructing the ONU to switch to the uplink 2.5G working mode, so that the ONU switches to the uplink 2.5G working mode and records the current working mode as 2.5G and the offline reset, so that the ONU receives the OLT 800. When the uplink 2.5G discovery window is sent, the above 2.5G registration is performed.

The ONU of the multi-work mode is first registered in the working mode of the above-mentioned 1G, and then the OLT 800 can initiate an uplink capability query to query whether the uplink rate of the ONU and the rate configured by the user are one. To. Specifically, the uplink transmission capability query message may be sent to the ONU through the Operation Administration and Maintenance (OAM) function, and then the ONU of the multi-operation mode sends the supported uplink transmission capability to the OLT 800 by using a response message, for example, to the OLT 800. The ONU is instructed to support the uplink 1G and the uplink 2.5G. After receiving the response message, the OLT 800 can instruct the ONU to switch to the working mode of the uplink 2.5G. After receiving the indication from the OLT 800, the ONU can record the current working mode as the uplink 2.5G. After obtaining the OLT 800 confirmation, the ONU can switch to the working mode of the uplink 2.5G, and reset the device, so that the ONU goes offline. After the ONU reset is completed, when the uplink 2.5G discovery window sent by the OLT 800 is received, the response is made and the uplink 2.5G registration is completed. At this point, the ONU is completed by the process of switching from the upstream 1G to the upstream 2.5G. In addition, after the ONU uplink 2.5G registration is completed, the OLT 800 may further initiate an uplink capability query to determine whether the current uplink rate of the ONU is consistent with the rate configured by the user, which is not limited by the present invention.

Optionally, as an embodiment, the ONU supports a downlink 10G/uplink 2.5G working mode, and further supports at least one of a downlink 10G/uplink 1G, a downlink 10G/uplink 10G, and a downlink 1G/uplink 1G. The discovery window enables the ONU supporting the upstream 2.5G to complete registration and works at downlink 10G/upstream 2.5G, providing higher uplink speed/bandwidth, thereby improving the user experience. Moreover, the optical module of the downlink 10G/uplink 2.5G ONU has a low cost, and can form a multi-mode ONU together with the downlink 10G/uplink 1G working mode, and the working mode is switched according to different needs, which is easy to implement and popularize.

Figure 9 is a schematic block diagram of an optical network unit in accordance with one embodiment of the present invention. The optical network unit ONU 900 of Fig. 9 includes a receiving unit 901 and a transmitting unit 902.

The receiving unit 901 receives the uplink 2.5G discovery window message sent by the optical line terminal OLT, where the ONU supports the uplink 2.5G; the sending unit 902 sends a registration request message to the OLT according to the uplink 2.5G discovery window message; the receiving unit 901 receives the OLT according to the registration request message. The registered registration message includes a logical link identifier LLID assigned by the OLT to the ONU; the sending unit 902 sends a registration success message to the OLT. The discovery window enables the ONU 900 supporting the uplink 2.5G to complete registration and works at the downstream 10G/upstream 2.5G, providing a higher uplink rate/bandwidth, thereby improving the user experience. Optionally, as an embodiment, the initial working mode of the ONU 900 is an uplink 2.5G, and the registration request message includes: an capability field for indicating that the ONU 900 supports the uplink 2.5G; and an indication that the ONU 900 currently requests to register as an uplink. 2.5G request field.

Specifically, the ONU 900 in the network needs to complete the discovery and registration process. The discovery module in the OLT periodically or irregularly opens the discovery window, that is, broadcasts a discovery window message to the ONU 900, which is an ONU that has not been registered yet. 900 offers an opportunity to register. Here, the OLT sends an uplink 2.5G discovery window message, that is, it allows the ONU 900 to support the uplink 2.5G registration. The ONU 900 can be the ONU 900 of the downlink 10G/uplink 2.5G, or the multi-operation mode supporting the uplink 2.5G. On the ONU 900, when the initial default working mode is downlink 10G/uplink 2.5G, when receiving the uplink 2.5G discovery window message of the OLT, the ONU 900 supporting the uplink 2.5G may send a registration request message to the OLT to respond to the discovery. The window message indicates to the OLT that it wishes to perform access registration, that is, the registration request message may include a capability field indicating that the ONU 900 supports the uplink 2.5G and a request field for requesting registration, and more specifically, registration by the MPCP. The extension field in the request message (Register_Req) is indicated to the OLT.

Optionally, as an embodiment, the initial working mode of the ONU 900 is uplink 1G, ONU.

The 900 further includes a switching unit and a generating unit: the switching unit switches the working mode to the uplink 2.5G according to the uplink 2.5G discovery window message; and the generating unit generates a registration request message carrying the capability field and the request field, where the capability field indicates that the ONU 900 simultaneously Supporting uplink 1G and uplink 2.5G, the request field indicates that the ONU 900 is currently requesting registration as an uplink 2.5G.

Here, the ONU 900 is an ONU 900 that supports a multi-operation mode of downlink 10G/uplink 2.5G, that is, while supporting 2.5G, it can also support other working modes such as downlink 1G/uplink 1G and downlink 10G/uplink 10G. In the case that the initial default working mode of the ONU 900 is downlink 10G/uplink 1G, when receiving the uplink 2.5G discovery window message of the OLT, the multi-operation mode ONU 900 supporting the uplink 2.5G may send a registration request message to the OLT. The window message should be found and indicated to the OLT that it wishes to register for access, that is, the registration request message can include a capability field indicating that the ONU 900 supports the uplink 2.5G and other modes of operation, and a request field requesting uplink 2.5G registration. More specifically, it can be indicated to the OLT through an extension field in the registration request message (Register_Req) of the MPCP. It should be understood that after receiving the 2.5G discovery window by the ONU 900 working in the uplink 1G by default, the ONU 900 can switch the working mode to 2.5G according to the 2.5G discovery window, so as to be 2.5G uplink in the subsequent registration interaction process. The line rate communicates with the OLT. Optionally, as an embodiment, the registration message includes an LLID, a synchronization time, and an upper limit of the laser switching time allocated by the OLT to the ONU 900. After receiving the registration request message, the OLT can allocate an LLID to the ONU 900 according to the message, that is, assign a logical link to the ONU 900, and also send a synchronization time and a laser switch time upper limit to the ONU 900 through the message, so as to complete the ONU. Synchronous calibration of the 900 and the OLT, and limiting the upper limit of the ONU 900 laser switching time, to prevent the uplink transmission of the ONU 900 from colliding with the uplink transmission of other ONUs 900, thereby improving efficiency.

Optionally, as an embodiment, the receiving unit 901 and the sending unit 902 are configured to perform maximum downlink 10G/uplink 2.5G data transmission with the OLT on the logical link corresponding to the LLID. Data transmission refers to the transmission and reception of data, which can be performed by the receiving unit 901 and the transmitting unit 902.

Specifically, after receiving the LLID allocated by the OLT, the ONU 900 can store the LLID in the register of the ONU 900. At this point, the logical link between the ONU 900 and the OLT is successfully established, and then the ONU 900 can pass through the logical link. The OLT sends a registration success message (Register- _Ack). After receiving the acknowledgment message, the OLT indicates that the registration process of the ONU 900 has been completed, and the ONU 900 passes the logical link at the maximum 2.5 according to the uplink transmission authorization given by the OLT in the subsequent process. The uplink rate of G is used for data transmission.

Optionally, as an embodiment, the receiving unit 901 receives the uplink 1G discovery window message sent by the OLT; the sending unit 902 sends a registration request message to the OLT according to the uplink 1G discovery window message, where the registration request message includes an indication that the ONU 900 supports the uplink. a capability field of 1G and a request field for instructing the ONU 900 to request registration as an uplink 1G; the receiving unit 901 receives a registration message sent by the OLT according to the registration request message, the registration message includes an LLID assigned by the OLT to the ONU 900; the sending unit 902 to the OLT A registration success message is sent to complete the registration of the ONU 900 upstream 1G.

For the ONU 900 in the multi-operation mode, the operation mode of the uplink 1G can be registered first, that is, in response to the uplink 1G discovery window message sent by the OLT, the LLID assigned by the OLT is accepted, the 1G registration is completed, and the logical link corresponding to the LLID is used. Data transmission is performed at an uplink rate of up to 1G. Then, in step 201, when the ONU 900 receives the uplink 2.5G discovery window message sent by the OLT, it can determine whether to switch to the working mode of the uplink 2.5G according to actual service requirements, and if it is determined to perform the handover, respond to the uplink 2.5G discovery window. The message completes the uplink 2.5G registration, and may not respond to the uplink 2.5G discovery window message if the current working mode is maintained. Optionally, as an embodiment, the ONU 900 further includes a recording unit and a reset unit. The receiving unit 901 receives a query message sent by the OLT for querying the uplink sending capability of the ONU 900. The sending unit 902 sends the OLT to the OLT for indicating the ONU 900. Supporting the uplink 1G and the uplink 2.5G response message; the receiving unit 901 receives the indication message sent by the OLT indicating that the ONU 900 switches to the uplink 2.5G working mode; the recording unit switches to the uplink 2.5G working mode according to the indication message and records the current working mode as 2.5G; The reset unit resets the ONU 900 offline and goes online again, waiting for the upstream 2.5G discovery window message sent by the OLT.

The ONU 900 of the multi-work mode is first registered in the working mode of the upper-layer 1G, and then the OLT can initiate an uplink capability query to check whether the uplink rate of the ONU 900 is consistent with the rate configured by the user. Specifically, the uplink transmission capability query message may be sent to the ONU 900 by using the Operation Administration and Maintenance (OAM) function, and then the ONU 900 in the multi-operation mode sends the supported uplink transmission capability to the OLT through a response message, for example, to the OLT. The ONU 900 is instructed to support the uplink 1G and the uplink 2.5G. After receiving the response message, the OLT may instruct the ONU 900 to switch to the uplink 2.5G working mode. After receiving the indication from the OLT, the ONU 900 can record the current working mode as 2.5G uplink. After obtaining the OLT confirmation, it can switch to the uplink 2.5G working mode and reset the device to make the ONU 900 go offline. After the ONU 900 is reset, when it receives the upstream 2.5G discovery window sent by the OLT, it responds and completes the uplink 2.5G registration. At this point, the ONU 900 is completed by the process of switching from the upstream 1G to the upstream 2.5G. In addition, after the ONG 900 uplink 2.5G registration is complete, the OLT can also initiate an uplink capability query to determine whether the current uplink rate of the ONU 900 is consistent with the rate configured by the user, which is not limited by the present invention.

Optionally, as an embodiment, the ONU 900 supports a downlink 10G/uplink 2.5G working mode, and further supports at least one of downlink 10G/uplink 1G, downlink 10G/uplink 10G, and downlink 1G/uplink 1G. Kind of work mode. The discovery window enables the ONU 900 supporting uplink 2.5G to complete registration and works at downlink 10G/upstream 2.5G, providing higher uplink speed/bandwidth, thereby improving the user experience. In addition, the optical module of the downlink 10G/uplink 2.5G ONU 900 has a lower cost, and can be combined with the downlink 10G/uplink 1G working mode to form a multi-mode ONU 900, and the working mode can be switched according to different needs, which is easy to implement and popularize.

Figure 10 is a schematic block diagram of an optical line terminal in accordance with another embodiment of the present invention. Figure 10 shows the end of the optical line The end OLT 100 includes a memory 101, a processor 102, a transmitting circuit 103, and a receiving circuit 104. Sending an uplink 2.5G discovery window message; receiving, by the receiving unit 104, a registration request message sent by the optical network unit ONU supporting the uplink 2.5G according to the discovery window message; sending a registration message to the ONU through the transmitting circuit 103, where the registration message includes the OLT assigning to the ONU The logical link identifies the LLID; receives the registration success message sent by the ONU through the receiving circuit 104. The discovery window enables the ONU supporting the uplink 2.5G to complete registration, and works in the downlink 10G/upstream 2.5G, providing a higher uplink rate/bandwidth, thereby improving the user experience.

The processor 102 controls the operation of the OLT 100, which may also be referred to as a CPU (Central).

Processing Unit, central processing unit). Memory 101 can include read only memory and random access memory and provides instructions and data to processor 102. A portion of the memory 101 may also include non-volatile random access memory (NVRAM). The various components of the OLT 100 are coupled together by a bus system 105, which may include, in addition to the data bus, a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 105 in the figure.

The method disclosed in the above embodiments of the present invention may be applied to the processor 102 or implemented by the processor 102. Processor 102 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the above method may be completed by an integrated logic circuit of the hardware in the processor 102 or an instruction in the form of software. The processor 102 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware. Component. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by the hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 101, and the processor 102 reads the information in the memory 101 and combines the hardware to perform the steps of the above method.

Optionally, as an embodiment, the initial working mode of the ONU is an uplink 2.5G, and the registration request message received by the OLT includes: an capability field for indicating that the ONU supports the uplink 2.5G; and A request field indicating that the ONU is currently requesting registration as an uplink 2.5G.

Optionally, as an embodiment, after the OLT receives the registration request message sent by the optical network unit ONU that supports the uplink 2.5G according to the discovery window message, the method further includes: determining, according to the capability field and the request field of the registration request message, the allocation to the ONU. LLID, synchronization time, and laser switching time cap; generate a registration message containing the LLID, synchronization time, and laser switch time cap.

Optionally, as an embodiment, after receiving the registration success message sent by the ONU, the OLT further includes: performing a maximum downlink 10G/uplink 2.5G data transmission with the ONU on the logical link corresponding to the LLID.

Optionally, as an embodiment, the initial working mode of the ONU is uplink 1G, and before the optical line terminal OLT sends the uplink 2.5G discovery window message, the method further includes: sending an uplink 1G discovery window message; and receiving the ONU according to the uplink 1G discovery window message. a registration request message, where the registration request message includes a capability field for indicating that the ONU supports the uplink 1G and a request field for indicating that the ONU currently requests to register as the uplink 1G; sending a registration message to the ONU, where the registration message includes logic allocated by the OLT to the ONU The link identifier LLID is received by the ONU to complete the registration of the ONU uplink 1G.

Optionally, as an embodiment, after receiving the registration success message sent by the ONU, the method further includes: sending an inquiry message to the ONU, so as to query the uplink transmission capability of the ONU; receiving a response message sent by the ONU, and the response message indicates that the ONU supports the uplink 1G. And uplink 2.5G; sending an indication message to the ONU for instructing the ONU to switch to the uplink 2.5G working mode, so that the ONU switches to the uplink 2.5G working mode and records the current working mode as 2.5G and the offline reset, so that the ONU receives When the upstream 2.5G discovery window sent by the OLT is sent, the above 2.5G registration is performed.

Optionally, as an embodiment, the ONU supports a downlink 10G/uplink 2.5G working mode, and further supports at least one of downlink 10G/uplink 1G, downlink 10G/uplink 10G, and downlink 1G/uplink 1G. Operating mode. The discovery window enables the ONU supporting the uplink 2.5G to complete registration, and works in the downlink 10G/upstream 2.5G, providing a higher uplink rate/bandwidth, thereby improving the user experience. Moreover, the optical module of the downlink 10G/uplink 2.5G ONU has a lower cost, and can be downlink 10G/uplink 1G. The working modes together form a multi-mode ONU, and the switching of the working mode according to different needs is easy to implement and popularize.

11 is a schematic block diagram of an optical network unit in accordance with another embodiment of the present invention. The optical network unit 110 of Fig. 11 includes a memory 111, a processor 112, a transmitting circuit 113, and a receiving circuit 114. Receiving an uplink 2.5G discovery window message sent by the optical line terminal OLT, wherein the ONU supports the uplink 2.5G; sending, by the transmitting circuit 113, a registration request message to the OLT according to the uplink 2.5G discovery window message; receiving, by the receiving circuit 114, the OLT sending according to the registration request message The registration message, the registration message includes the logical link identifier LLID assigned by the OLT to the ONU; the registration success message is sent to the OLT through the transmitting circuit 113.

The Ethernet passive optical network in the embodiment of the present invention opens an uplink 2.5G discovery window to the ONU 110 through the OLT, so that the ONU supporting the uplink 2.5G can complete registration, and works in the downlink 10G/upstream 2.5G, providing a higher uplink. Rate/bandwidth, which improves the user experience.

The processor 112 controls the operation of the ONU 110, which may also be referred to as a CPU (Central Processing Unit). Memory 111 can include read only memory and random access memory and provides instructions and data to processor 112. A portion of the memory 111 may also include non-volatile random access memory (NVRAM). The various components of the ONU 110 are coupled together by a bus system 115, which may include, in addition to the data bus, a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as the bus system 115 in the figure.

The method disclosed in the foregoing embodiments of the present invention may be applied to the processor 112 or implemented by the processor 112. Processor 112 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 112 or an instruction in a form of software. The processor 112 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware. Component. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or executed. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The software module can be located in a random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, Registers and other mature storage media in the field. The storage medium is located in the memory 111, and the processor 112 reads the information in the memory 111 and combines the hardware to complete the steps of the above method.

Optionally, as an embodiment, the initial working mode of the ONU is uplink 1G, and before the ONU sends the registration request message to the OLT according to the uplink 2.5G discovery window message, the method further includes: switching the working mode to the uplink according to the uplink 2.5G discovery window message. 2.5G; and generating a registration request message carrying the capability field and the request field, wherein the capability field indicates that the ONU supports both the uplink 1G and the uplink 2.5G, and the request field indicates that the ONU currently requests to register as the uplink 2.5G.

Optionally, as an embodiment, the registration message includes an LLID, a synchronization time, and an upper limit of the laser switching time allocated by the OLT to the ONU.

Optionally, as an embodiment, after the ONU sends the registration success message to the OLT, the method further includes: performing a maximum downlink 10G/uplink 2.5G data transmission with the OLT on the logical link corresponding to the LLID.

Optionally, as an embodiment, before the optical network unit ONU receives the uplink 2.5G discovery window message sent by the optical line terminal OLT, the method further includes: receiving an uplink 1G discovery window message sent by the OLT; and sending the message to the OLT according to the uplink 1G discovery window message. a registration request message, where the registration request message includes a capability field for indicating that the ONU supports the uplink 1G, and a request field for indicating that the ONU currently requests to register as the uplink 1G; receiving the registration message sent by the OLT according to the registration request message, where the registration message includes the OLT allocation The LLID of the ONU is sent to the OLT to complete the registration of the ONU uplink 1G.

Optionally, as an embodiment, after the sending the registration success message to the OLT, the method further includes: receiving, by the OLT, an inquiry message for querying an uplink sending capability of the ONU; sending, to the OLT, the ONU to support the uplink 1G and the uplink 2.5G. The response message sent by the OLT, indicating that the ONU switches to the uplink 2.5G working mode; switches to the uplink 2.5G working mode according to the indication message and records the current working mode as 2.5G; after the offline reset and goes online again, waits for the OLT The upstream 2.5G discovery window message sent.

Optionally, as an embodiment, the ONU supports a downlink 10G/uplink 2.5G working mode, and further supports at least one of a downlink 10G/uplink 1G, a downlink 10G/uplink 10G, and a downlink 1G/uplink 1G. The Ethernet passive optical network in the embodiment of the present invention opens an uplink 2.5G discovery window to the ONU 110 through the OLT, so that the ONU supporting the uplink 2.5G can complete registration, and works in the downlink 10G/upstream 2.5G, providing a higher uplink. Rate/bandwidth, which improves the user experience. Moreover, the optical module of the downlink 10G/uplink 2.5G ONU has a low cost, and can form a multi-mode ONU together with a working mode such as a downlink 10G/uplink 1G, and can switch between working modes according to different needs, and is easy to implement and popularize.

Optionally, as an embodiment, an Ethernet passive optical network system includes: an optical line terminal, an optical splitter, and a plurality of optical network units, wherein the optical line terminal passes the optical splitter and the optical The network unit is connected, wherein the optical line terminal may include an optical line terminal in the embodiment corresponding to FIG. 8 and FIG. 10, and the optical network unit may include the embodiment in FIG. 9 and FIG. Optical network unit, which will not be described here.

It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention. The implementation process constitutes any limitation.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in a combination of electronic hardware or computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

It will be apparent to those skilled in the art that, for the convenience of the description and the cleaning process, the specific operation of the system, the device and the unit described above may be referred to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, may be located in one place. Or it can be distributed to multiple network elements. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential to the prior art or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily change or replace it within the technical scope disclosed by the present invention. All should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Rights request

1. A communication method, characterized in that it includes:

The optical line terminal OLT sends the uplink 2.5G discovery window message;

The OLT receives the registration request message sent by the optical network unit ONU supporting uplink 2.5G according to the discovery window message;

The OLT sends a registration message to the ONU, where the registration message includes the logical link identifier LLID assigned by the OLT to the ONU;

The OLT receives the registration success message sent by the ONU.

2. The method according to claim 1, characterized in that the initial working mode of the ONU is uplink 2.5G, and the registration request message received by the OLT includes:

A capability field used to indicate that the ONU supports uplink 2.5G; and

A request field used to indicate that the ONU is currently requesting registration for uplink 2.5G.

3. The method according to claim 1, characterized in that the initial working mode of the ONU is uplink 1G, and the registration request message received by the OLT includes:

A capability field used to indicate that the ONU supports both uplink 1G and uplink 2.5G; and a request field used to indicate that the ONU is currently requesting registration as uplink 2.5G.

4. The method according to claim 2 or 3, characterized in that, after the OLT receives the registration request message sent by the optical network unit ONU supporting uplink 2.5G according to the discovery window message, it also includes:

Determine the LLID, synchronization time and laser switching time upper limit assigned to the ONU according to the capability field and the request field of the registration request message;

Generate a registration message containing the LLID, synchronization time and upper limit of laser switching time.

5. The method according to claim 1, characterized in that, the initial working mode of the ONU is uplink 1G, and before the optical line terminal OLT sends the uplink 2.5G discovery window message, it further includes: sending the uplink 1G discovery window message. ;

Receive a registration request message sent by the ONU according to the uplink 1G discovery window message, wherein the registration request message includes a capability field indicating that the ONU supports uplink 1G and a capability field indicating that the ONU is currently requesting registration as uplink 1G request fields;

Send a registration message to the ONU, where the registration message includes the logical link identifier LLID assigned by the OLT to the ONU;

Receive the registration success message sent by the ONU to complete the registration of the ONU upstream 1G.

6. The method according to claim 5, characterized in that, after receiving the registration success message sent by the ONU, further comprising:

Send a query message to the ONU to query the uplink transmission capability of the ONU; receive a response message sent by the ONU, where the response message indicates that the ONU supports uplink 1G and uplink 2.5G;

Send an instruction message for instructing the ONU to switch to the uplink 2.5G working mode to the ONU, so that the ONU switches to the uplink 2.5G working mode and records that the current working mode is 2.5G and goes offline to reset, so that the ONU can switch to the uplink 2.5G working mode. The ONU registers with the uplink 2.5G when receiving the uplink 2.5G discovery window sent by the OLT.

7. A communication method, characterized by including:

The optical network unit ONU receives the uplink 2.5G discovery window message sent by the optical line terminal OLT, where the ONU supports uplink 2.5G;

The ONU sends a registration request message to the OLT according to the uplink 2.5G discovery window message;

The ONU receives the registration message sent by the OLT according to the registration request message, and the registration message includes the logical link identifier LLID assigned by the OLT to the ONU;

The ONU sends a registration success message to the OLT.

8. The method according to claim 1, characterized in that the initial working mode of the ONU is uplink 2.5G, and the registration request message includes:

A capability field used to indicate that the ONU supports uplink 2.5G; and

9. The method according to claim 1, characterized in that, the initial working mode of the ONU is uplink 1G, and before the ONU sends a registration request message to the OLT according to the uplink 2.5G discovery window message, it also includes :

Switch the working mode to uplink 2.5G according to the uplink 2.5G discovery window message; and generate a registration request message carrying a capability field and a request field, where the capability field indicates that the ONU supports both uplink 1G and uplink 2.5G, The request field indicates that the ONU is currently requesting registration for uplink 2.5G.

10. The method according to claim 8 or 9, characterized in that the registration message includes the LLID, synchronization time and laser switching time upper limit assigned by the OLT to the ONU.

11. The method according to claim 7, characterized in that, the optical network unit ONU receives Before the uplink 2.5G discovery window message sent by the optical line terminal OLT, it also includes:

Receive the uplink 1G discovery window message sent by the OLT;

Send a registration request message to the OLT according to the uplink 1G discovery window message, where the registration request message includes a capability field used to indicate that the ONU supports uplink 1G and a capability field used to indicate that the ONU is currently requesting registration as uplink 1G. request fields;

Receive a registration message sent by the OLT according to the registration request message, where the registration message includes the LLID assigned by the OLT to the ONU;

Send a registration success message to the OLT to complete the registration of the ONU uplink 1G.

12. The method according to claim 11, characterized in that, after sending the registration success message to the OLT, it further includes:

Receive a query message sent by the OLT for querying the uplink transmission capability of the ONU; Send a response message to the OLT indicating that the ONU supports uplink 1G and uplink 2.5G;

Receive an instruction message sent by the OLT instructing the ONU to switch to the uplink 2.5G working mode;

Switch to the uplink 2.5G working mode according to the instruction message and record the current working mode as 2.5G;

After resetting offline and going online again, wait for the uplink 2.5G discovery window message sent by the OLT.

13. An optical line terminal, characterized by: including:

The sending unit is used to send the uplink 2.5G discovery window message; the registration request message for message sending;

The sending unit is configured to send a registration message to the ONU, where the registration message includes a logical link identifier LLID assigned by the OLT to the ONU;

The receiving unit is configured to receive the registration success message sent by the ONU.

14. The optical line terminal according to claim 13, characterized in that, the initial working mode of the ONU is uplink 2.5G, and the registration request message received by the receiving unit includes: used to indicate that the ONU supports uplink 2.5G capability fields; and

15. The optical line terminal according to claim 13, characterized in that: the initial terminal of the ONU The initial working mode is uplink 1G. The registration request message received by the receiving unit includes: a capability field used to indicate that the ONU supports both uplink 1G and uplink 2.5G; and a capability field used to indicate that the ONU is currently requesting registration as uplink. 2.5G request field.

16. The optical line terminal according to claim 14 or 15, characterized in that the optical line terminal further includes a determining unit, the determining unit is used to:

17. The optical line terminal according to claim 13, characterized in that, the initial working mode of the ONU is uplink 1G, and the sending unit is also used to: send an uplink 1G discovery window message; the receiving unit is also used to: Receive a registration request message sent by the ONU according to the uplink 1G discovery window message, wherein the registration request message includes a capability field indicating that the ONU supports uplink 1G and a capability field indicating that the ONU is currently requesting registration as uplink 1G The request field; The sending unit is also used to send a registration message to the ONU, where the registration message includes the logical link identifier LLID assigned by the OLT to the ONU;

The receiving unit is also configured to receive a registration success message sent by the ONU to complete the registration of the ONU uplink 1G.

18. The optical line terminal according to claim 17, characterized in that the sending unit is also used for:

Send a query message to the ONU to query the uplink transmission capability of the ONU; receive the response message sent by the ONU through the receiving unit, and the response message indicates that the ONU supports uplink 1G and uplink 2.5G;

Send an instruction message for instructing the ONU to switch to the uplink 2.5G working mode to the ONU, so that the ONU switches to the uplink 2.5G working mode and records that the current working mode is 2.5G and goes offline to reset, so that the ONU can switch to the uplink 2.5G working mode. The ONU registers with the upstream 2.5G when receiving the upstream 2.5G discovery window sent by the OLT.

19. An optical network unit, characterized by: including:

A receiving unit, configured to receive the uplink 2.5G discovery window message sent by the optical line terminal OLT, where the ONU supports uplink 2.5G;

A sending unit, configured to send a registration request message to the OLT according to the uplink 2.5G discovery window message; The receiving unit is configured to receive a registration message sent by the OLT according to the registration request message. The registration message includes the logical link identifier LLID assigned by the OLT to the ONU; the sending unit is configured to send the registration message to the ONU. The OLT sends a registration success message.

20. The optical network unit according to claim 19, characterized in that the initial working mode of the ONU is uplink 2.5G, and the registration request message includes:

A capability field used to indicate that the ONU supports uplink 2.5G; and

21. The optical network unit according to claim 19, characterized in that, the initial working mode of the ONU is uplink 1G, the ONU further includes a switching unit and a generating unit, the switching unit is used to: according to the uplink The 2.5G discovery window message switches the working mode to uplink 2.5G; and the generating unit is used to generate a registration request message carrying a capability field and a request field, where the capability field indicates that the ONU supports both uplink 1G and uplink 2.5 G. The request field indicates that the ONU is currently requesting registration for uplink 2.5G.

22. The optical network unit according to claim 20 or 21, characterized in that the registration message contains the LLID, synchronization time and laser switching time upper limit assigned by the OLT to the ONU.

23. The optical network unit according to claim 19, wherein the receiving unit is further configured to: receive the uplink 1G discovery window message sent by the OLT;

The sending unit is also configured to send a registration request message to the OLT according to the uplink 1G discovery window message, wherein the registration request message includes a capability field used to indicate that the ONU supports uplink 1G and a capability field used to indicate that the ONU supports uplink 1G. The current request is registered as the request field for uplink 1G;

The receiving unit is also configured to receive a registration message sent by the OLT according to the registration request message, where the registration message includes the LLID assigned by the OLT to the ONU;

The sending unit is also configured to send a registration success message to the OLT to complete the registration of the ONU uplink 1G.

24. The optical network unit according to claim 23, characterized in that, the ONU further includes a recording unit and a reset unit, and the receiving unit is further configured to: receive an uplink message sent by the OLT for querying the ONU. Send capability query messages;

The sending unit is also configured to send a response message to the OLT indicating that the ONU supports uplink 1G and uplink 2.5G;

The receiving unit is also configured to receive an instruction sent by the OLT to indicate that the ONU switches to the uplink.

2.5G working mode indication message;

The recording unit is configured to switch to the uplink 2.5G working mode according to the instruction message and record that the current working mode is 2.5G;

The reset unit is used for offline reset and after going online again, wait for the uplink 2.5G discovery window message sent by the OLT.

25. An Ethernet passive optical network system, characterized by: including:

Optical line terminal, optical splitter and multiple optical network units, the optical line terminal is connected to the optical network unit through the optical splitter, wherein the optical line terminal includes the optical line terminal as described in claims 13-18 Any optical line terminal, the optical network unit includes any optical network unit as described in claims 19-24.