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Uplink bandwidth allocation method and device

A bandwidth allocation method and technology for bandwidth allocation, applied in the field of communications, can solve the problems of loss of Allocation structure and defects in GPON fault tolerance.

Active Publication Date: 2010-12-22
NANTONG HUAXIN CENT AIR CONDITIONER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In related technologies, when the OLT allocates several consecutive Allocation structures to an ONU (that is, the StratTime value in the next Allocation structure is equal to the previous StopTime value after being subtracted by one), one of the Allocation structures (not the last Allocation structure) is lost, The ONU will turn off the laser. If the transmission time corresponding to the allocated bandwidth of the lost Allocation structure is less than the sum of the guard time (Guard-Time) and the ONU physical layer overhead (PLO) time, when the ONU is ready to transmit the next Allocation structure corresponding to When the data in the T-CONT, the OLT does not reserve enough Guard-Time and PLO time for the ONU, which may cause the loss of the next Allocation structure
Therefore, when the OLT allocates several consecutive Allocation structures to an ONU, if one (not the last) Allocation structure is lost, the subsequent Allocation structure may also be lost
[0009] In the prior art, there is no certain method to avoid the impact of the loss of an Allocation Structure on the subsequent Allocation Structure, and there is no recovery method for the lost Allocation Structure, which makes the fault tolerance of GPON in upstream bandwidth allocation flawed.

Method used

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  • Uplink bandwidth allocation method and device

Examples

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example 1

[0064] image 3 It is a flowchart of Example 1 of the present invention. Such as image 3 As shown, Example 1 of the present invention mainly includes the following processing (step S301-step S303):

[0065] Step S301: When the OLT allocates several consecutive Allocationstructures to an ONU, the OLT writes the number m in the reserved field bit6-0 in the Flags field of each Allocation structure, 0≤m≤127, indicating that the OLT is in the current Allocationstructure Later, m Allocation structures are assigned to this ONU.

[0066] Step S303: The ONU uses this information to analyze and receive several consecutive Allocation structures, and obtains the total upstream transmission bandwidth belonging to this ONU, and the ONU keeps turning on the laser for the uplink data transmission during the time corresponding to its own total upstream transmission bandwidth.

[0067] The following describes in detail the impact of the loss of the Allocation structure on uplink transmissio...

example 2

[0076] Figure 4 It is the flowchart of Example 2 of the present invention. Such as Figure 4 As shown, the second example of the present invention mainly includes the following processing (step S401-step S403):

[0077] Step S401: When the OLT allocates several consecutive Allocation structures to an ONU, the OLT writes the number n in the reserved field bit5-3 in the Flags field of each Allocation structure, 1≤n≤7, indicating that the OLT assigns this ONU n consecutive Allocation structures are allocated; the OLT writes the number l in the reserved field bit2-0 in the Flags field of each Allocation structure, 1≤l≤7, indicating that the current Allocation structure is the first one allocated by the OLT to this ONU An Allocation structure.

[0078] Step S403: The ONU receives several consecutive Allocation structures by analyzing the information carried by bit5-0 in the Flags field, and obtains the total upstream transmission bandwidth belonging to this ONU. Turn on the la...

example 3

[0088] Figure 5 It is a flowchart of Example 3 of the present invention. Such as Figure 5 As shown, the third example of the present invention mainly includes the following processing (step S501-step S503):

[0089] Step S501: When the OLT allocates several consecutive Allocationstructures to an ONU, the OLT writes the number m in the reserved field bit6-0 in the Flags field of each Allocation structure, 0≤m≤127, indicating that the OLT is in the current Allocationstructure m Allocation structures were assigned to this ONU earlier;

[0090] Step S503: The ONU uses the above digital information to analyze and receive several consecutive Allocation structures, and obtains the total uplink transmission bandwidth belonging to this ONU, and the ONU keeps turning on the laser for uplink data transmission during the time corresponding to its own uplink transmission total bandwidth .

[0091] The impact of the loss of the Allocation structure on uplink transmission when the meth...

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Abstract

The invention discloses an uplink bandwidth allocation method and a device, and the method comprises the following steps: a lower-layer network element receives bandwidth allocation structures from an upper-layer network element, wherein the bandwidth allocation structures carry association relation information and time information; and the lower-layer network element maintains the data transmission state according to the association relation information and the time information and obtains total bandwidth of uplink transmission to carry out uplink data transmission. The method and the device solve the problem that the loss of one of (not the last one) the bandwidth allocation structures may cause the loss of subsequent bandwidth allocation structures when the uplink data transmission is carried out and the upper-layer network element allocates a plurality of continuous bandwidth allocation structures to some lower-layer network element, thereby further limiting the influence scope of the phenomenon that when one of the bandwidth allocation structures loses, the loss of one or more subsequent bandwidth allocation structures can be caused effectively.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to an uplink bandwidth allocation method and device in the field of communications. Background technique [0002] Gigabit-Capable Passive Optical Network (GPON) technology is an important technical branch of the passive optical network (PON) family, similar to other PON technologies, GPON is also a point-to-multipoint Topological passive optical access technology. [0003] GPON is composed of an optical line terminal (Optical Line Terminal, OLT for short), an Optical Network Unit (ONU for short) on the user side, and an Optical Distribution Network (ODN for short). 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 between OLT and ONU. [0004] In the GPON system, the data transmission i...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L1/00H04Q11/00H04L47/525
Inventor 张伟良耿丹
Owner NANTONG HUAXIN CENT AIR CONDITIONER
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