WO2016050022A1 - 一种上行带宽分配的方法、设备及系统、计算机存储介质 - Google Patents

一种上行带宽分配的方法、设备及系统、计算机存储介质 Download PDF

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WO2016050022A1
WO2016050022A1 PCT/CN2015/071754 CN2015071754W WO2016050022A1 WO 2016050022 A1 WO2016050022 A1 WO 2016050022A1 CN 2015071754 W CN2015071754 W CN 2015071754W WO 2016050022 A1 WO2016050022 A1 WO 2016050022A1
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bandwidth
llid
weight
uplink data
recovery threshold
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PCT/CN2015/071754
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English (en)
French (fr)
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金军
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深圳市中兴微电子技术有限公司
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  • the present invention relates to bandwidth allocation technologies in the field of communications, and in particular, to a method, device and system for uplink bandwidth allocation in a passive optical network.
  • EPON Error Network Passive Optical Network
  • ONT optical line terminal
  • ODN optical distribution network
  • ONU Logical Link Identifier
  • the downlink data between the OLT and the ONU is broadcasted, and the uplink data uses a channel in a time division multiplexing manner.
  • the ONU sends a dynamic bandwidth report message carrying the uplink data volume of each LLID to the OLT, and the OLT firstly uses the uplink data of each LLID.
  • the amount and preset bandwidth configuration information respectively allocate fixed bandwidth and guaranteed bandwidth for the corresponding LLID. After all the fixed bandwidth and guaranteed bandwidth of the LLID are allocated, all LLIDs can share the remaining bandwidth according to their respective weights.
  • the scheme of uplink bandwidth allocation in the existing passive optical network has at least the following defects:
  • the best effort is to allocate the best LLID according to the respective weights of the LLIDs.
  • bandwidth for LLIDs with small weights, the best-effort bandwidth allocated will be small, and the total uplink bandwidth allocated for the LLID may not be enough for the bandwidth sent by one Ethernet packet, since it is uplinked in the EPON protocol.
  • Ethernet data packets must be transmitted in whole packets and cannot be transmitted in fragments.
  • the uplink bandwidth allocated is less than one Ethernet data packet, the LLID will not transmit data. Therefore, the prior art is prone to bandwidth waste and transmission loss. The phenomenon of flow.
  • the embodiments of the present invention are directed to providing a method, device, and system for uplink bandwidth allocation, which not only improve resource utilization, but also avoid the phenomenon of transmission interruption during uplink data transmission.
  • An embodiment of the present invention provides a method for uplink bandwidth allocation in a passive optical network, where the method includes:
  • the optical line terminal OLT receives the dynamic bandwidth report message, where the dynamic bandwidth report message carries the uplink data volume of each logical link tag LLID;
  • the uplink bandwidth is allocated for the corresponding LLID according to the preset bandwidth configuration information, the bandwidth recovery threshold, and the uplink data volume of each LLID.
  • the bandwidth configuration information includes a fixed bandwidth, a guaranteed bandwidth, and a best effort bandwidth expected by each LLID;
  • the weight bandwidth, the bandwidth recovery threshold, and the remaining bandwidth requirement value of each LLID are respectively allocated to the corresponding LLID according to the weight bandwidth of each LLID, including:
  • Step A Comparing the weight bandwidth of the LLID with the bandwidth recovery threshold and the remaining bandwidth requirement value of the LLID; if the weight bandwidth of the LLID is greater than the remaining bandwidth requirement value of the LLID and greater than the bandwidth recovery threshold, then In step B, if the weight bandwidth of the LLID is greater than the bandwidth recovery threshold and less than the remaining bandwidth requirement value of the LLID, proceed to step C; if the weight bandwidth of the LLID is less than the bandwidth recovery threshold, proceed to step D. ;
  • Step B The best effort bandwidth allocated for the LLID is the remaining bandwidth requirement value of the LLID, and the current processing flow is ended;
  • Step C The best effort bandwidth allocated for the LLID is the weight bandwidth of the LLID, and the current processing flow is ended;
  • Step D The weighted bandwidth of the LLID is stored in the bandwidth recovery container, and when it is determined that the accumulated value in the bandwidth recovery container is less than the bandwidth recovery threshold, the process proceeds to step A; determining that the accumulated value in the bandwidth recovery container is greater than When the bandwidth recovery threshold is equal to, the best effort bandwidth allocated for the LLID is the accumulated value in the bandwidth recovery container, and the current processing flow is ended.
  • the bandwidth recovery threshold ranges from 600 to 900 TQ, where TQ is a bandwidth allocation unit in the passive optical network.
  • the method further includes:
  • the OLT allocates an uplink data transmission time for each LLID; and sends an uplink data transmission indication information, where the uplink data transmission indication information is used to indicate that each LLID sends uplink data in the allocated uplink data transmission time and the uplink bandwidth.
  • an embodiment of the present invention provides an OLT, where the OLT includes: a receiving module and a bandwidth allocation module;
  • the receiving module is configured to receive, by the OLT, a dynamic bandwidth report message, where the dynamic bandwidth report is The message carries the amount of uplink data of each LLID;
  • the bandwidth allocation module is configured to allocate an uplink bandwidth to the corresponding LLID according to the preset bandwidth configuration information, the bandwidth recovery threshold, and the uplink data volume of each LLID.
  • the bandwidth configuration information includes a fixed bandwidth, a guaranteed bandwidth, and a best effort bandwidth expected by each LLID;
  • the bandwidth allocation module is configured to:
  • the bandwidth allocation module is configured to:
  • Step A Comparing the weight bandwidth of the LLID with the bandwidth recovery threshold and the remaining bandwidth requirement value of the LLID; if the weight bandwidth of the LLID is greater than the remaining bandwidth requirement value of the LLID and greater than the bandwidth recovery threshold, then In step B, if the weight bandwidth of the LLID is greater than the bandwidth recovery threshold and less than the remaining bandwidth requirement value of the LLID, proceed to step C; if the weight bandwidth of the LLID is less than the bandwidth recovery threshold, proceed to step D. ;
  • Step B The best effort bandwidth allocated for the LLID is the remaining bandwidth requirement value of the LLID, and the current processing flow is ended;
  • Step C The best effort bandwidth allocated for the LLID is the weight bandwidth of the LLID, and the current processing flow is ended;
  • Step D The weighted bandwidth of the LLID is stored in the bandwidth recovery container, and when it is determined that the accumulated value in the bandwidth recovery container is less than the bandwidth recovery threshold, the process proceeds to step A; determining that the accumulated value in the bandwidth recovery container is greater than When the bandwidth recovery threshold is equal to the allocation of the LLID The bandwidth is the accumulated value in the bandwidth recovery container, and the processing flow is ended.
  • the bandwidth recovery threshold ranges from 600 to 900 TQ, where TQ is a bandwidth allocation unit in the passive optical network.
  • the OLT further includes:
  • a time allocation module configured to allocate an uplink data transmission time for each LLID
  • the sending module is configured to send uplink data transmission indication information, where the uplink data transmission indication information is used to indicate that each LLID sends uplink data in the allocated uplink data transmission time and the uplink bandwidth.
  • the embodiment of the present invention provides a system for uplink bandwidth allocation in a passive optical network, where the system includes: an OLT and an ONU;
  • the ONU is configured to send a dynamic bandwidth report message, where the dynamic bandwidth report message carries an uplink data volume of each LLID;
  • the OLT is configured to allocate an uplink bandwidth to the corresponding LLID according to the preset bandwidth configuration information, the bandwidth recovery threshold, and the uplink data volume of each LLID when the dynamic bandwidth report message is received.
  • the OLT includes the OLT described in the specific embodiment.
  • Embodiments of the present invention provide a computer storage medium in which computer executable instructions are stored, the computer executable instructions being used to perform the above method.
  • the OLT receives the dynamic bandwidth report message, where the dynamic bandwidth report message carries the uplink data amount of each LLID; according to the preset bandwidth
  • the configuration information, the bandwidth recovery threshold, and the uplink data volume of each LLID allocate the uplink bandwidth to the corresponding LLID; thus, the embodiment of the present invention can not only improve resource utilization, but also avoid the phenomenon of transmission interruption during uplink data transmission. .
  • FIG. 1 is a schematic diagram of a topology structure of an EPON system in the prior art
  • FIG. 2 is a schematic flowchart of a method for implementing uplink bandwidth allocation in a passive optical network according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a structure of an OLT according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a system for uplink bandwidth allocation in a passive optical network according to an embodiment of the present invention.
  • the OLT receives the dynamic bandwidth report message, where the dynamic bandwidth report message carries the uplink data volume of each LLID; according to the preset bandwidth configuration information, the bandwidth recovery threshold, and the uplink data volume of each LLID The corresponding LLID allocates upstream bandwidth.
  • the present invention proposes an uplink bandwidth in the passive optical network.
  • the method of allocation includes the following steps:
  • Step 200 The OLT receives a dynamic bandwidth report message, where the dynamic bandwidth report message carries the uplink data volume of each LLID.
  • Step 201 The OLT allocates an uplink bandwidth to the corresponding LLID according to the preset bandwidth configuration information, the bandwidth recovery threshold, and the uplink data volume of each LLID.
  • the bandwidth configuration information includes information such as a fixed bandwidth, a guaranteed bandwidth, and a best-effort bandwidth expected by each LLID; the OLT firstly determines a fixed bandwidth according to each LLID, Guaranteed bandwidth, best-effort bandwidth, and uplink data volume of each LLID respectively allocate fixed bandwidth and guaranteed bandwidth for the corresponding LLID, and determine the remaining bandwidth requirement value of each LLID; then, calculate the weight of each LLID, and calculate according to the weight As a result, the weight bandwidth of each LLID is obtained, and the best effort bandwidth is allocated for the corresponding LLID according to the weight bandwidth of each LLID, the bandwidth recovery threshold, and the remaining bandwidth requirement value of each LLID, and how to perform each LLID according to each LLID.
  • the weight bandwidth, the bandwidth recovery threshold, and the best effort bandwidth of each LLID are respectively described for the corresponding LLID best effort bandwidth, including the following steps:
  • Step A Comparing the weight bandwidth of the LLID with the bandwidth recovery threshold and the remaining bandwidth requirement value of the LLID. If the weight bandwidth of the LLID is greater than the remaining bandwidth requirement value of the LLID and greater than the bandwidth recovery threshold, then In step B, if the weight bandwidth of the LLID is greater than the bandwidth recovery threshold and less than the remaining bandwidth requirement value of the LLID, proceed to step C; if the weight bandwidth of the LLID is less than the bandwidth recovery threshold, proceed to step D. ;
  • Step B The best effort bandwidth allocated for the LLID is the remaining bandwidth requirement value of the LLID, and the current processing flow is ended;
  • Step C The best effort bandwidth allocated for the LLID is the weight bandwidth of the LLID, and the current processing flow is ended;
  • Step D The weighted bandwidth of the LLID is stored in the bandwidth recovery container, and when it is determined that the accumulated value in the bandwidth recovery container is less than the bandwidth recovery threshold, the process proceeds to step A; determining that the accumulated value in the bandwidth recovery container is greater than When the bandwidth recovery threshold is equal to, the best effort bandwidth allocated for the LLID is the accumulated value in the bandwidth recovery container, and the current processing flow is ended.
  • the bandwidth recovery container needs to be cleared in advance.
  • the bandwidth recovery threshold needs to be set by debugging in actual engineering, and the bandwidth recovery threshold is at least larger than the data volume of the minimum data packet that the system can support, for example, 64 bytes, but the bandwidth recovery threshold is also Cannot be set too large, otherwise the interval of uplink bandwidth allocation will be too long, and the LLID cache is not enough to store too much data. Therefore, the bandwidth is The threshold of the bandwidth recovery needs to be set according to the actual service traffic.
  • the bandwidth recovery threshold in the EPON ranges from 600 to 900 TQ, where TQ is the bandwidth allocation unit in the EPON, where the bandwidth recovery threshold is taken.
  • the value is not specifically limited; preferably, the bandwidth recovery threshold set according to the packet length in the LLID service is 800 TQ, that is, 1600 bytes.
  • the method further includes:
  • the OLT allocates an uplink data transmission time for each LLID, and sends an uplink data transmission indication information, where the uplink data transmission indication information is used to indicate that each LLID sends uplink data in the allocated uplink data transmission time and the uplink bandwidth;
  • the uplink data transmission indication information includes an uplink data transmission time and an uplink bandwidth of each LLID.
  • the LLID by setting a bandwidth recovery threshold, when determining that the weight bandwidth of the LLID is less than the bandwidth recovery threshold, the LLID is not allocated the best effort bandwidth, and the weight bandwidth of the LLID is stored in the bandwidth recovery container.
  • the best effort bandwidth allocated for the LLID is the bandwidth recovery The accumulated value in the container, so that the uplink bandwidth allocated for each LLID is not less than the data amount of one data packet by the limitation of the bandwidth recovery threshold, thereby not only improving resource utilization but also avoiding uplink data.
  • the phenomenon of transmission interruption occurs during transmission.
  • the current LLID service has a data packet length of 2000 bytes, and the upstream data volume of a certain LLID is 6000 bytes.
  • the preset fixed bandwidth of the LLID is 300 bytes, and the guaranteed bandwidth is 100 bytes. According to the LLID service.
  • the packet length preset bandwidth recovery threshold is 1600 bytes;
  • the weight bandwidth allocated to the LLID is only 50 bytes each time.
  • the phenomenon of transmission interruption occurs during transmission.
  • the embodiment of the present invention further provides a system for uplink bandwidth allocation in an OLT and a passive optical network. Since the principle and method for solving the problem of the uplink bandwidth allocation in the OLT and the passive optical network are similar, For the implementation process and implementation principle of the system for the uplink bandwidth allocation in the OLT and the passive optical network, refer to the implementation process and the implementation principle of the foregoing method, and the repeated description is not repeated.
  • the OLT provided by the embodiment of the present invention includes: a receiving module 300, a bandwidth allocating module 301, where
  • the receiving module 300 is configured to receive, by the OLT, a dynamic bandwidth report message, where the dynamic bandwidth report message carries an uplink data volume of each LLID;
  • the bandwidth allocation module 301 is configured to allocate an uplink bandwidth to the corresponding LLID according to the preset bandwidth configuration information, the bandwidth recovery threshold, and the uplink data volume of each LLID.
  • the bandwidth configuration information includes a fixed bandwidth, a guaranteed bandwidth, and a best effort bandwidth expected by each LLID; and the bandwidth allocation module 301 is configured to:
  • the bandwidth allocation module 301 is configured to:
  • Step A Comparing the weight bandwidth of the LLID with the bandwidth recovery threshold and the remaining bandwidth requirement value of the LLID; if the weight bandwidth of the LLID is greater than the remaining bandwidth requirement value of the LLID and greater than the bandwidth recovery threshold, then In step B, if the weight bandwidth of the LLID is greater than the bandwidth recovery threshold and less than the remaining bandwidth requirement value of the LLID, proceed to step C; if the weight bandwidth of the LLID is less than the bandwidth recovery threshold, proceed to step D. ;
  • Step B The best effort bandwidth allocated for the LLID is the remaining bandwidth requirement value of the LLID, and the current processing flow is ended;
  • Step C The best effort bandwidth allocated for the LLID is the weight bandwidth of the LLID, and the current processing flow is ended;
  • Step D The weighted bandwidth of the LLID is stored in the bandwidth recovery container, and when it is determined that the accumulated value in the bandwidth recovery container is less than the bandwidth recovery threshold, the process proceeds to step A; determining that the accumulated value in the bandwidth recovery container is greater than When the bandwidth recovery threshold is equal to, the best effort bandwidth allocated for the LLID is the accumulated value in the bandwidth recovery container, and the current processing flow is ended.
  • the bandwidth recovery threshold ranges from 600 to 900 TQ, where TQ is a bandwidth allocation unit in the passive optical network.
  • the OLT further includes:
  • the time allocation module 302 is configured to allocate an uplink data transmission time for each LLID
  • the sending module 303 is configured to send uplink data transmission indication information, where the uplink data transmission indication information is used to indicate that each LLID sends uplink data in the allocated uplink data transmission time and the uplink bandwidth.
  • the receiving module 300, the bandwidth allocating module 301, the time allocating module 302, and the sending module 303 may be implemented by a central processing unit (CPU), a microprocessor (MPU), and a digital signal processor (DSP) located in the OLT. ), or field programmable gate array (FPGA) implementation.
  • CPU central processing unit
  • MPU microprocessor
  • DSP digital signal processor
  • FPGA field programmable gate array
  • a system for uplink bandwidth allocation in a passive optical network includes: an OLT 400 and an ONU 401, where
  • the ONU 400 is configured to send a dynamic bandwidth report message, where the dynamic bandwidth report message carries an uplink data volume of each LLID;
  • the OLT 401 is configured to allocate an uplink bandwidth to the corresponding LLID according to the preset bandwidth configuration information, the bandwidth recovery threshold, and the uplink data volume of each LLID when the dynamic bandwidth report message is received.
  • the OLT includes the OLT described in the embodiment of the present invention.
  • the embodiment of the present invention further provides a computer storage medium, wherein computer executable instructions are stored, and the computer executable instructions are used to execute the method described in any one of the foregoing method embodiments.
  • Each of the above units may be implemented by a central processing unit (CPU), a digital signal processor (DSP), or a field-programmable gate array (FPGA) in an electronic device.
  • CPU central processing unit
  • DSP digital signal processor
  • FPGA field-programmable gate array
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明公开了一种上行带宽分配的方法,该方法包括:OLT接收动态带宽报告消息,所述动态带宽报告消息中携带有每个LLID的上行数据量;根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽。本发明还公开了一种OLT及无源光网络中上行带宽分配的设备、系统及计算机存储介质。

Description

一种上行带宽分配的方法、设备及系统、计算机存储介质 技术领域
本发明涉及通信领域的带宽分配技术,尤其涉及一种无源光网络中上行带宽分配的方法、设备及系统。
背景技术
基于以太网的无源光网络(EPON,Ethernet Passive Optical Network)技术是无源光网络(PON,Passive Optical Network)技术中的一个重要分支,与其它PON技术类似,EPON也是一种采用点到多点拓扑结构的无源光接入技术。EPON系统中一般采用树型的拓扑结构,如图1所示,所述EPON系统包括局侧的光线路终端(OLT,Optical Line Terminal)、光分配网络(ODN,Optical Distribution Network)、用户侧的光网络单元(ONU,Optical Network Unit)、以及逻辑链路标记(Logical Link Identifier,LLID),其中,所述OLT和所述ODN连接,所述ODN连接多个ONU,所述ONU连接至少一个LLID,所述OLT和所述ONU之间下行数据通过广播方式,上行数据通过时分复用方式使用信道。
现有无源光网络中上行带宽分配的技术方案中,所述ONU将携带有每个LLID的上行数据量的动态带宽报告消息发送给所述OLT,所述OLT首先根据每个LLID的上行数据量及预设的带宽配置信息分别为相应的LLID分配固定带宽和保证带宽,在所有LLID的固定带宽和保证带宽分配完后,所有LLID才能按各自权重分享剩余的带宽。
发明人在实现本发明的过程中,发现现有的无源光网络中上行带宽分配的方案至少存在以下缺陷:
现有技术中,主要是根据LLID各自的权重为相应的LLID分配尽力 而为带宽,对于权重很小的LLID来说,分配的尽力而为带宽将很小,为该LLID分配的总上行带宽有可能不够一个以太网数据包发送的带宽,由于,在EPON协议中上行以太网数据包必须整包传输,不能分片传输,现有技术中若分配的上行带宽小于一个以太网数据包,则LLID不会发送数据,因此,现有技术极易出现带宽浪费及传输断流的现象。
发明内容
有鉴于此,本发明实施例期望提供一种上行带宽分配的方法、设备及系统,不仅能提高资源利用率,还能避免在上行数据传输过程中出现传输断流的现象。
为达到上述目的,本发明的技术方案是这样实现的:
本发明实施例提供了一种无源光网络中上行带宽分配的方法,该方法包括:
光线路终端OLT接收动态带宽报告消息,所述动态带宽报告消息中携带有每个逻辑链路标记LLID的上行数据量;
根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽。
一具体实施例中,所述带宽配置信息包括每个LLID期望的固定带宽、保证带宽和尽力而为带宽;
所述根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽,包括:
根据每个LLID期望的固定带宽、保证带宽、尽力而为带宽以及每个LLID的上行数据量分别为相应的LLID分配固定带宽、保证带宽,并确定每个LLID的剩余带宽需求值;
计算每个LLID的权重,根据权重计算结果得到每个LLID的权重带宽,并根据每个LLID的权重带宽、带宽回收阈值和每个LLID的剩余带宽需求 值分别为相应的LLID分配尽力而为带宽。
一具体实施例中,所述根据每个LLID的权重带宽、带宽回收阈值和每个LLID的剩余带宽需求值分别为相应的LLID分配尽力而为带宽,包括:
步骤A、将LLID的权重带宽与所述带宽回收阈值及所述LLID的剩余带宽需求值进行对比;若LLID的权重带宽大于所述LLID的剩余带宽需求值且大于所述带宽回收阈值,则转入步骤B;若LLID的权重带宽大于所述带宽回收阈值,且小于所述LLID的剩余带宽需求值,则转入步骤C;若LLID的权重带宽小于所述带宽回收阈值,则转入步骤D;
步骤B、为所述LLID分配的尽力而为带宽为所述LLID的剩余带宽需求值,结束本次处理流程;
步骤C、为所述LLID分配的尽力而为带宽为所述LLID的权重带宽,结束本次处理流程;
步骤D、将所述LLID的权重带宽存入带宽回收容器,确定所述带宽回收容器中的累加值小于所述带宽回收阈值时,转入步骤A;确定所述带宽回收容器中的累加值大于等于所述带宽回收阈值时,为所述LLID分配的尽力而为带宽为所述带宽回收容器中的累加值,结束本次处理流程。
一具体实施例中,所述带宽回收阈值的取值范围为600~900TQ,其中,TQ为所述无源光网络中的带宽分配单位。
一具体实施例中,所述方法还包括:
所述OLT为每个LLID分配上行数据传输时间;发送上行数据传输指示信息,所述上行数据传输指示信息用于指示每个LLID在分配的上行数据传输时间及上行带宽内发送上行数据。
基于上述方法,本发明实施例提供了一种OLT,该OLT包括:接收模块、带宽分配模块;其中,
所述接收模块,配置为OLT接收动态带宽报告消息,所述动态带宽报 告消息中携带有每个LLID的上行数据量;
所述带宽分配模块,配置为根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽。
一具体实施例中,所述带宽配置信息包括每个LLID期望的固定带宽、保证带宽和尽力而为带宽;
所述带宽分配模块配置为:
根据每个LLID期望的固定带宽、保证带宽、尽力而为带宽以及每个LLID的上行数据量分别为相应的LLID分配固定带宽、保证带宽,并确定每个LLID的剩余带宽需求值;
计算每个LLID的权重,根据权重计算结果得到每个LLID的权重带宽,并根据每个LLID的权重带宽、带宽回收阈值和每个LLID的剩余带宽需求值分别为相应的LLID分配尽力而为带宽。
一具体实施例中,所述带宽分配模块配置为:
步骤A、将LLID的权重带宽与所述带宽回收阈值及所述LLID的剩余带宽需求值进行对比;若LLID的权重带宽大于所述LLID的剩余带宽需求值且大于所述带宽回收阈值,则转入步骤B;若LLID的权重带宽大于所述带宽回收阈值,且小于所述LLID的剩余带宽需求值,则转入步骤C;若LLID的权重带宽小于所述带宽回收阈值,则转入步骤D;
步骤B、为所述LLID分配的尽力而为带宽为所述LLID的剩余带宽需求值,结束本次处理流程;
步骤C、为所述LLID分配的尽力而为带宽为所述LLID的权重带宽,结束本次处理流程;
步骤D、将所述LLID的权重带宽存入带宽回收容器,确定所述带宽回收容器中的累加值小于所述带宽回收阈值时,转入步骤A;确定所述带宽回收容器中的累加值大于等于所述带宽回收阈值时,为所述LLID分配的尽 力而为带宽为所述带宽回收容器中的累加值,结束本次处理流程。
一具体实施例中,所述带宽回收阈值的取值范围为600~900TQ,其中,TQ为所述无源光网络中的带宽分配单位。
一具体实施例中,所述OLT还包括:
时间分配模块,配置为为每个LLID分配上行数据传输时间;
发送模块,配置为发送上行数据传输指示信息,所述上行数据传输指示信息用于指示每个LLID在分配的上行数据传输时间及上行带宽内发送上行数据。
基于上述方法,本发明实施例提供了一种无源光网络中上行带宽分配的系统,该系统包括:OLT、ONU;其中,
所述ONU,配置为发送动态带宽报告消息,所述动态带宽报告消息中携带有每个LLID的上行数据量;
所述OLT,配置为接收到动态带宽报告消息时,根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽。
一具体实施例中,所述OLT包括具体实施例中所述的OLT。
本发明实施例提供了一种计算机存储介质,其中存储有计算机可执行指令,所述计算机可执行指令用于执行上述的方法。
本发明实施例所提供的上行带宽分配的方法、设备及系统、计算机存储介质,OLT接收动态带宽报告消息,所述动态带宽报告消息中携带有每个LLID的上行数据量;根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽;如此,本发明实施例不仅能提高资源利用率,还能避免在上行数据传输过程中出现传输断流的现象。
附图说明
图1为现有技术中EPON系统的拓扑结构示意图;
图2为本发明实施例无源光网络中上行带宽分配的方法实现流程示意图;
图3为本发明实施例OLT的组成结构示意图;
图4为本发明实施例无源光网络中上行带宽分配的系统的组成结构示意图。
具体实施方式
本发明实施例中,OLT接收动态带宽报告消息,所述动态带宽报告消息中携带有每个LLID的上行数据量;根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽。
下面结合附图和具体实施例对本发明的技术方案进一步详细阐述。
为解决现有技术中仅根据LLID各自的权重为相应的LLID分配尽力而为带宽,而导致在传输过程中出现带宽浪费及传输断流的问题,本发明提出一种无源光网络中上行带宽分配的方法,如图2所示,该方法包括以下步骤:
步骤200,OLT接收动态带宽报告消息,所述动态带宽报告消息中携带有每个LLID的上行数据量。
步骤201,OLT根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽。
这里,在为每个LLID分配上行带宽时,首先为每个LLID分配固定带宽、保证带宽,在所有LLID的固定带宽和保证带宽分配完后,所有LLID才能分享剩余的带宽,即:为每个LLID分配尽力而为带宽;
具体的,所述带宽配置信息包括每个LLID期望的固定带宽、保证带宽和尽力而为带宽等信息;所述OLT首先根据每个LLID期望的固定带宽、 保证带宽、尽力而为带宽以及每个LLID的上行数据量分别为相应的LLID分配固定带宽、保证带宽,并确定每个LLID的剩余带宽需求值;然后,计算每个LLID的权重,根据权重计算结果得到每个LLID的权重带宽,并根据每个LLID的权重带宽、带宽回收阈值和每个LLID的剩余带宽需求值分别为相应的LLID分配尽力而为带宽,下面对如何根据每个LLID的权重带宽、带宽回收阈值和每个LLID的尽力而为带宽分别为相应的LLID分配尽力而为带宽进行详细说明,包括以下步骤:
步骤A,将LLID的权重带宽与所述带宽回收阈值及所述LLID的剩余带宽需求值进行对比,若LLID的权重带宽大于所述LLID的剩余带宽需求值且大于所述带宽回收阈值,则转入步骤B;若LLID的权重带宽大于所述带宽回收阈值,且小于所述LLID的剩余带宽需求值,则转入步骤C;若LLID的权重带宽小于所述带宽回收阈值,则转入步骤D;
步骤B,为所述LLID分配的尽力而为带宽为所述LLID的剩余带宽需求值,结束本次处理流程;
步骤C,为所述LLID分配的尽力而为带宽为所述LLID的权重带宽,结束本次处理流程;
步骤D,将所述LLID的权重带宽存入带宽回收容器,确定所述带宽回收容器中的累加值小于所述带宽回收阈值时,转入步骤A;确定所述带宽回收容器中的累加值大于等于所述带宽回收阈值时,为所述LLID分配的尽力而为带宽为所述带宽回收容器中的累加值,结束本次处理流程。
这里,所述带宽回收容器需要预先清零。
这里,所述带宽回收阈值需要在实际工程中通过调试来设置,所述带宽回收阈值至少要大于系统可支持的最小数据包的数据量,例如,64字节,但是,所述带宽回收阈值也不能设置的过大,否则会导致上行带宽分配的时间间隔过长,并且LLID的缓存不足以存储过多的数据,因此,所述带宽 回收阈值需要根据实际业务流量情况来设置,通常,在EPON中所述带宽回收阈值的取值范围为600~900TQ,其中,TQ为EPON中的带宽分配单位,这里对所述带宽回收阈值的取值不作具体限定;优选的,根据LLID业务中的数据包长设置的带宽回收阈值为800TQ,即:1600字节。
进一步地,所述OLT为每个LLID分配上行带宽之后,还包括:
所述OLT为每个LLID分配上行数据传输时间,并发送上行数据传输指示信息,所述上行数据传输指示信息用于指示每个LLID在分配的上行数据传输时间及上行带宽内发送上行数据;其中,所述上行数据传输指示信息包括每个LLID的上行数据传输时间及上行带宽。
本发明实施例中,通过设置带宽回收阈值,可以在确定LLID的权重带宽小于带宽回收阈值时,暂时不为所述LLID分配尽力而为带宽,将所述LLID的权重带宽存入带宽回收容器,在下一个DBA周期中继续为所述LLID分配尽力而为带宽,直到所述带宽回收容器中的累加值大于等于所述带宽回收阈值时,为所述LLID分配的尽力而为带宽为所述带宽回收容器中的累加值,这样,通过所述带宽回收阈值的限制,为每个LLID分配的上行带宽不会小于一个数据包的数据量,因此,不仅能提高资源利用率,还能避免在上行数据传输过程中出现传输断流的现象。
下面结合具体实施例对上述无源光网络中上行带宽分配的方法进一步详细阐述。
实施例一
假设当前LLID业务中的数据包长都是2000字节,某个LLID的上行数据量为6000字节,预设该LLID期望的固定带宽为300字节、保证带宽为100字节,根据LLID业务中的数据包长预设带宽回收阈值为1600字节;
首先,根据期望的固定带宽300字节与保证带宽100字节,以及上行数据量6000字节为该LLID分配固定带宽300及保证带宽100,并确定该 LLID的剩余带宽需求值为6000-300-100=5600字节;
然后,根据该LLID的权重,确定每次为该LLID分配的权重带宽只有50字节,根据所述带宽回收阈值1600字节,需要积累1600/50=32个DBA周期才能为该LLID分配一次尽力而为带宽,此时,为该LLID分配的上行带宽为300+100+1600=2000字节,足够该LLID发送一个数据包的带宽,这样,不仅能提高资源利用率,还能避免在上行数据传输过程中出现传输断流的现象。
为实现上述方法,本发明实施例还提供了一种OLT及无源光网络中上行带宽分配的系统,由于OLT及无源光网络中上行带宽分配的系统解决问题的原理与方法相似,因此,OLT及无源光网络中上行带宽分配的系统的实施过程及实施原理均可以参见前述方法的实施过程及实施原理描述,重复之处不再赘述。
如图3所示,本发明实施例提供的OLT,该OLT包括:接收模块300、带宽分配模块301;其中,
所述接收模块300,配置为OLT接收动态带宽报告消息,所述动态带宽报告消息中携带有每个LLID的上行数据量;
所述带宽分配模块301,配置为根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽。
以上功能单元或模块的划分方式仅为本发明实施例给出的一种优选实现方式,功能单元或模块的划分方式不构成对本发明的限制。
具体实施中,所述带宽配置信息包括每个LLID期望的固定带宽、保证带宽和尽力而为带宽;所述带宽分配模块301配置为:
根据每个LLID期望的固定带宽、保证带宽、尽力而为带宽以及每个LLID的上行数据量分别为相应的LLID分配固定带宽、保证带宽,并确定每个LLID的剩余带宽需求值;
计算每个LLID的权重,根据权重计算结果得到每个LLID的权重带宽,并根据每个LLID的权重带宽、带宽回收阈值和每个LLID的剩余带宽需求值分别为相应的LLID分配尽力而为带宽。
具体实施中,所述带宽分配模块301配置为:
步骤A、将LLID的权重带宽与所述带宽回收阈值及所述LLID的剩余带宽需求值进行对比;若LLID的权重带宽大于所述LLID的剩余带宽需求值且大于所述带宽回收阈值,则转入步骤B;若LLID的权重带宽大于所述带宽回收阈值,且小于所述LLID的剩余带宽需求值,则转入步骤C;若LLID的权重带宽小于所述带宽回收阈值,则转入步骤D;
步骤B、为所述LLID分配的尽力而为带宽为所述LLID的剩余带宽需求值,结束本次处理流程;
步骤C、为所述LLID分配的尽力而为带宽为所述LLID的权重带宽,结束本次处理流程;
步骤D、将所述LLID的权重带宽存入带宽回收容器,确定所述带宽回收容器中的累加值小于所述带宽回收阈值时,转入步骤A;确定所述带宽回收容器中的累加值大于等于所述带宽回收阈值时,为所述LLID分配的尽力而为带宽为所述带宽回收容器中的累加值,结束本次处理流程。
具体实施中,所述带宽回收阈值的取值范围为600~900TQ,其中,TQ为所述无源光网络中的带宽分配单位。
具体实施中,所述OLT还包括:
时间分配模块302,配置为为每个LLID分配上行数据传输时间;
发送模块303,配置为发送上行数据传输指示信息,所述上行数据传输指示信息用于指示每个LLID在分配的上行数据传输时间及上行带宽内发送上行数据。
在实际应用中,所述接收模块300、带宽分配模块301、时间分配模块302、发送模块303可由位于所述OLT的中央处理器(CPU)、微处理器(MPU)、数字信号处理器(DSP)、或现场可编程门阵列(FPGA)实现。
如图4所示,本发明实施例提供的无源光网络中上行带宽分配的系统,该系统包括:OLT400和ONU401,其中,
所述ONU400,配置为发送动态带宽报告消息,所述动态带宽报告消息中携带有每个LLID的上行数据量;
所述OLT401,配置为接收到动态带宽报告消息时,根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽。
具体实施中,所述OLT包括本发明实施例中所述的OLT。
本发明实施例还提供了一种计算机存储介质,其中存储有计算机可执行指令,所述计算机可执行指令用于执行上述任一方法实施例所述的方法。
上述各单元可以由电子设备中的中央处理器(Central Processing Unit,CPU)、数字信号处理器(Digital Signal Processor,DSP)或可编程逻辑阵列(Field-Programmable Gate Array,FPGA)实现。
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。因此,本发明可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。

Claims (13)

  1. 一种无源光网络中上行带宽分配的方法,其中,所述方法包括:
    光线路终端OLT接收动态带宽报告消息,所述动态带宽报告消息中携带有每个逻辑链路标记LLID的上行数据量;
    根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽。
  2. 根据权利要求1所述的方法,其中,所述带宽配置信息包括每个LLID期望的固定带宽、保证带宽和尽力而为带宽;
    所述根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽,包括:
    根据每个LLID期望的固定带宽、保证带宽、尽力而为带宽以及每个LLID的上行数据量分别为相应的LLID分配固定带宽、保证带宽,并确定每个LLID的剩余带宽需求值;
    计算每个LLID的权重,根据权重计算结果得到每个LLID的权重带宽,并根据每个LLID的权重带宽、带宽回收阈值和每个LLID的剩余带宽需求值分别为相应的LLID分配尽力而为带宽。
  3. 根据权利要求2所述的方法,其中,所述根据每个LLID的权重带宽、带宽回收阈值和每个LLID的剩余带宽需求值分别为相应的LLID分配尽力而为带宽,包括:
    步骤A、将LLID的权重带宽与所述带宽回收阈值及所述LLID的剩余带宽需求值进行对比;若LLID的权重带宽大于所述LLID的剩余带宽需求值且大于所述带宽回收阈值,则转入步骤B;若LLID的权重带宽大于所述带宽回收阈值,且小于所述LLID的剩余带宽需求值,则转入步骤C;若LLID的权重带宽小于所述带宽回收阈值,则转入步骤D;
    步骤B、为所述LLID分配的尽力而为带宽为所述LLID的剩余带宽需 求值,结束本次处理流程;
    步骤C、为所述LLID分配的尽力而为带宽为所述LLID的权重带宽,结束本次处理流程;
    步骤D、将所述LLID的权重带宽存入带宽回收容器,确定所述带宽回收容器中的累加值小于所述带宽回收阈值时,转入步骤A;确定所述带宽回收容器中的累加值大于等于所述带宽回收阈值时,为所述LLID分配的尽力而为带宽为所述带宽回收容器中的累加值,结束本次处理流程。
  4. 根据权利要求1至3任一项所述的方法,其中,所述带宽回收阈值的取值范围为600~900TQ,其中,TQ为所述无源光网络中的带宽分配单位。
  5. 根据权利要求1至3任一项所述的方法,其中,所述方法还包括:
    所述OLT为每个LLID分配上行数据传输时间;发送上行数据传输指示信息,所述上行数据传输指示信息用于指示每个LLID在分配的上行数据传输时间及上行带宽内发送上行数据。
  6. 一种OLT,其中,所述OLT包括:接收模块、带宽分配模块;其中,
    所述接收模块,配置为接收动态带宽报告消息,所述动态带宽报告消息中携带有每个LLID的上行数据量;
    所述带宽分配模块,配置为根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽。
  7. 根据权利要求6所述的OLT,其中,所述带宽配置信息包括每个LLID期望的固定带宽、保证带宽和尽力而为带宽;
    所述带宽分配模块配置为:
    根据每个LLID期望的固定带宽、保证带宽、尽力而为带宽以及每个LLID的上行数据量分别为相应的LLID分配固定带宽、保证带宽,并确定 每个LLID的剩余带宽需求值;
    计算每个LLID的权重,根据权重计算结果得到每个LLID的权重带宽,并根据每个LLID的权重带宽、带宽回收阈值和每个LLID的剩余带宽需求值分别为相应的LLID分配尽力而为带宽。
  8. 根据权利要求7所述的OLT,其中,所述带宽分配模块配置为:
    步骤A、将LLID的权重带宽与所述带宽回收阈值及所述LLID的剩余带宽需求值进行对比;若LLID的权重带宽大于所述LLID的剩余带宽需求值且大于所述带宽回收阈值,则转入步骤B;若LLID的权重带宽大于所述带宽回收阈值,且小于所述LLID的剩余带宽需求值,则转入步骤C;若LLID的权重带宽小于所述带宽回收阈值,则转入步骤D;
    步骤B、为所述LLID分配的尽力而为带宽为所述LLID的剩余带宽需求值,结束本次处理流程;
    步骤C、为所述LLID分配的尽力而为带宽为所述LLID的权重带宽,结束本次处理流程;
    步骤D、将所述LLID的权重带宽存入带宽回收容器,确定所述带宽回收容器中的累加值小于所述带宽回收阈值时,转入步骤A;确定所述带宽回收容器中的累加值大于等于所述带宽回收阈值时,为所述LLID分配的尽力而为带宽为所述带宽回收容器中的累加值,结束本次处理流程。
  9. 根据权利要求6至8任一项所述的OLT,其中,所述带宽回收阈值的取值范围为600~900TQ,其中,TQ为所述无源光网络中的带宽分配单位。
  10. 根据权利要求6至8任一项所述的OLT,其中,所述OLT还包括:
    时间分配模块,配置为为每个LLID分配上行数据传输时间;
    发送模块,配置为发送上行数据传输指示信息,所述上行数据传输指示信息用于指示每个LLID在分配的上行数据传输时间及上行带宽内发送 上行数据。
  11. 一种无源光网络中上行带宽分配的系统,其中,所述系统包括:OLT、光网络单元ONU;其中,
    所述ONU,配置为发送动态带宽报告消息,所述动态带宽报告消息中携带有每个LLID的上行数据量;
    所述OLT,配置为接收到动态带宽报告消息时,根据预设的带宽配置信息、带宽回收阈值和每个LLID的上行数据量为相应的LLID分配上行带宽。
  12. 根据权利要求11所述的系统,其中,所述OLT包括权利要求6至10任一项所述的OLT。
  13. 一种计算机存储介质,其中存储有计算机可执行指令,所述计算机可执行指令用于执行所述权利要求1至5任一项所述的方法。
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