Method and system for implementing multi- service bearer in passive optical lan

1 . A method for implementing multi-service bearer in a passive optical LAN (POL), wherein the method comprises:

step S 1 : constructing a POL, and accessing an entire campus network at a bandwidth of Gigabit according to a point-to-multipoint star topology comprising three layers: a core layer, a convergence layer, and an access layer, to form a 10 Gbit backbone, wherein an optical network terminal enters a room and is deployed according to such a manner that one classroom or functional room has one terminal mode;

step S 2 : planning and managing the entire POL, and defining a plurality of LANs through a software definition (SD)-LAN, wherein different LANs bear different services; and

step S 3 : allocating different service bandwidths to different LANs through a sharding mechanism of the PON,

wherein the SD-LAN is a software definition LAN;

wherein in step S 1 , a campus network core and an access device are in an active design; the convergence layer is in a passive optical network design; the core layer uses an optical line terminal (OLT); the access layer uses an optical network unit (ONU); and the convergence layer uses a passive optical distribution network (ODN) device for networking;

wherein in the method, the SD-LAN provides peer-to-peer LAN communication by constructing a peer-to-peer communication pipeline and controlling the communication pipeline to communicate with different service systems.

2 . The method for implementing the multi-service bearer in the POL according to claim 1 , wherein in the method, devices that the SD-LAN manages comprise a Broadband Remote Access Server (BRAS), an OLT, an ONU, and the SD-LAN cooperates with a core switch and a service system.

3 . The method for implementing the multi-service bearer in the POL according to claim 2 ,

wherein in step S 2 , a LAN partitioning method of the SD-LAN comprises:

partitioning according to devices: an OLT, an OLT board card, a PON port, and an ONU port;

partitioning according to physical positions: different buildings, floors, teaching areas, and office areas;

partitioning according to services: video monitoring, an all-purpose card, a water and electricity meter, an Internet of Things terminal, an office network, a teaching network, and a student network; and

partitioning according to multi-access control (MAC) addresses of device terminals: allocation of the devices to the different LANs.

4 . The method for implementing the multi-service bearer in the POL according to claim 3 , wherein in the SD-LAN control in step S 3 , the LANs are divided according to an actual situation of a school, corresponding bandwidths are allocated to the different LANs.

5 . A system for implementing multi-service bearer in a POL, wherein the system is configured to perform the method claim 1 , and the system comprises:

a dynamic SD-LAN partitioning module: configured to dynamically partition the POL into different LANs, wherein each LAN bears different services;

an SD-LAN bandwidth management module: wherein the SD-LAN bandwidth management module is configured to configure quality of service (QoS) of the SD-LAN to the peer-to-peer bandwidth channel allocated to each LAN to ensure that respective service systems have an enough bandwidth;

an SD-LAN monitoring module: configured to monitor a running condition of the entire POL, usages of the bandwidths of the different LANs, a usage of a bandwidth of each terminal in each LAN, usages of bandwidths of nodes contained in each LAN, and whether a bandwidth bottleneck exists; and

an SD-LAN calculation module, wherein the SD-LAN calculation module is configured to calculate a bandwidth born by each PON port, calculate an available maximum bandwidth, and indicate, when a new service is configured at the PON port, a remaining bandwidth for allocation of the PON and whether the PON port is able to bear the newly added service.

6 . The system for implementing the multi-service bearer in the POL according to claim 5 , wherein the system further comprises an SD-LAN recording module, and the SD-LAN recording module is configured to record a running condition of each node in the POL.

7 . The system for implementing the multi-service bearer in the POL according to claim 6 , wherein the bandwidth management module of the system is based on bandwidth control of a gigabit-capable passive optical network (GPON); an uplink data stream in the GPON is transmitted in a time division multiple address (TDMA) manner; the GPON bears an uplink service through a T-CONT, and the OLT achieves uplink in a scheduling manner by a database administrator (DBA), wherein the T-CONT is the most basic control unit for an uplink bandwidth in the GPON system; and the uplink bandwidth of each service is controlled by configuring a corresponding T-CONT for each service.

8 . The system for implementing the multi-service bearer in the POL according to claim 7 , wherein the T-CONT is divided into five types: only providing a fixed bandwidth, only providing an assured bandwidth, providing assured and non-assured bandwidths, providing a best-effort bandwidth, and simultaneously providing a fixed bandwidth, an assured bandwidth, and a non-assured bandwidth.