Uplink bandwidth allocation method and system in a passive optical network system

A passive optical network and bandwidth allocation technology, applied in the field of communications, can solve the problems of bandwidth allocation in hybrid PON systems that have not been proposed, and achieve the effect of improving uplink transmission efficiency

Active Publication Date: 2016-09-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above case, each ONU can adjust the downlink wavelength (subcarrier or subcarrier group) for receiving downlink signals and the uplink wavelength (subcarrier or subcarrier group) for sending uplink data according to the command of OLT, and Under the command of the OLT, the uplink data is sent in a specific uplink time slot, but the method for bandwidth allocation in the above-mentioned hybrid PON system has not been proposed in the prior art

Method used

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  • Uplink bandwidth allocation method and system in a passive optical network system
  • Uplink bandwidth allocation method and system in a passive optical network system
  • Uplink bandwidth allocation method and system in a passive optical network system

Examples

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example 1

[0049] In this embodiment, the allocated wavelength information and time slot information are all encapsulated in the Allocation structure, and the topology structure of the wavelength division time division hybrid PON system is as follows image 3 a or image 3 As shown in b, the OLT and ONU use the following steps to complete the upstream bandwidth allocation:

[0050] Step 1: The allocation structure of the OLT to the ONU includes such as Figure 4 Several field information shown, among them:

[0051] The OLT identity information field is used to carry the identity information of the OLT, including one or any combination of the following: the country where the OLT is located (Country), the city where the OLT is located (City), the OLT identification information (OLT-ID), and the slot identification of the OLT information (Slot-ID), the port identification information (Port-ID) that the OLT is currently working on, and the transmitted optical power information (Power) of t...

example 2

[0061] In this embodiment, the allocated subcarrier information and time slot information are encapsulated in the Allocation structure, and the topology of the frequency-division and time-division hybrid PON system is as follows image 3 a or image 3 As shown in b, the OLT and ONU use the following steps to complete the upstream bandwidth allocation:

[0062] Step 1: Assign OLT to ONU Figure 8 The bandwidth allocation shown, where:

[0063] OLT identity information is used to carry the identity information of the OLT, including one or any combination of the following: the country where the OLT is located (Country), the city where the OLT is located (City), the OLT identification information (OLT-ID), and the slot identification information of the OLT (Slot-ID), the port identification information (Port-ID) that the OLT is currently working on, and the transmitted optical power information (Power) of the OLT. The role of the OLT identity information is for the ONU to identif...

example 3

[0073] The wavelength information allocated in this embodiment is sent by a Physical layer Operations, Administration and Maintenance (PLOAM) message, an ONU Management and Control Interface (ONU Management and Control Interface, OMCI) message or an embedded operation, maintenance and management eOAM message , the time slot information is encapsulated in the Allocation structure;

[0074] The topology of WDM / TDM hybrid PON system is as follows: image 3 a or image 3 As shown in b, the OLT and ONU use the following steps to complete the upstream bandwidth allocation:

[0075] Step 1: OLT sends the physical layer operation management maintenance PLOAM message shown in table 1 to an ONU, as shown in table 1, the first to second byte of distributing ONU wavelength (Assign_ONU_Wavelength) message is ONU-ID (here The ONU-ID is only an example of the ONU identification information, in other embodiments, the logical link identification information of the ONU, the ONU media access c...

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Abstract

The invention discloses an uplink bandwidth allocation method and system in a passive optical network, which is used to solve the technical problem of ONU bandwidth allocation in a hybrid PON system. The scheme is: the optical line terminal OLT transmits the bandwidth allocation information of the uplink bandwidth to the optical network unit ONU through the bandwidth allocation channel, or the optical line terminal OLT transmits the bandwidth allocation information of the uplink bandwidth to the ONU through the management channel and the bandwidth allocation channel, said The bandwidth allocation information includes: physical channel information, data transmission time information; when using the management channel and bandwidth allocation channel to transmit bandwidth allocation information, the management channel is used to transmit physical channel information, and the bandwidth allocation channel is used to transmit uplink data transmission time information. In the present invention, the OLT allocates the bandwidth on the physical channel and the time channel to the ONUs, realizes the resource sharing of the uplink physical channel and the time channel among the ONUs, and improves the uplink transmission efficiency of the ONUs.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an uplink bandwidth allocation method and system in a passive optical network system. Background technique [0002] With the development of network technology, the network can be used to transmit a large number of voice, data, video and other services, so the requirements for bandwidth continue to increase, and the passive optical network (PON) is produced under this demand. [0003] The topology of the PON system is as follows figure 1 As shown, the PON system usually consists of an optical line terminal (OLT) at the office side, an optical network unit (ONU) at the user side, and an optical distribution network (ODN), and usually adopts a point-to-multipoint network structure. ODN is composed of passive optical components such as single-mode optical fibers, optical splitters, and optical connectors, and provides optical transmission media for the physical connection bet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/917H04Q11/00H04L47/76
CPCH04Q11/0067H04Q2011/0064
Inventor 耿丹马壮郭勇何子安朱松林李长垒袁立权张德智
Owner ZTE CORP
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