WO2011144157A1 - 传输数据的方法、装置和系统 - Google Patents

传输数据的方法、装置和系统 Download PDF

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Publication number
WO2011144157A1
WO2011144157A1 PCT/CN2011/075188 CN2011075188W WO2011144157A1 WO 2011144157 A1 WO2011144157 A1 WO 2011144157A1 CN 2011075188 W CN2011075188 W CN 2011075188W WO 2011144157 A1 WO2011144157 A1 WO 2011144157A1
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WO
WIPO (PCT)
Prior art keywords
back pressure
priority
data
queue length
output port
Prior art date
Application number
PCT/CN2011/075188
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English (en)
French (fr)
Inventor
陈武茂
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP11783074.5A priority Critical patent/EP2477366B1/en
Publication of WO2011144157A1 publication Critical patent/WO2011144157A1/zh
Priority to US13/469,956 priority patent/US8549193B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/50—Overload detection or protection within a single switching element
    • H04L49/505—Corrective measures
    • H04L49/506—Backpressure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/26—Flow control; Congestion control using explicit feedback to the source, e.g. choke packets
    • H04L47/266—Stopping or restarting the source, e.g. X-on or X-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/29—Flow control; Congestion control using a combination of thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/30—Flow control; Congestion control in combination with information about buffer occupancy at either end or at transit nodes

Definitions

  • the present invention relates to the field of data transmission technologies, and in particular, to a method, device and system for transmitting data. Background technique
  • information transmission between a line card and a switching network usually uses a queue back-pressure mechanism, that is, the switching network detects the data transmission status of each output port, and when the output port appears When congested, the switching network generates backpressure information, informing all line cards to stop sending data to the output port. If the data streams of two different service levels are from two different line cards, they will be stopped at the same time, and the data stream with higher service level cannot be sent preferentially. Therefore, how to ensure the efficient transmission of high service level data streams has become a major technical problem for packet switched communication. Summary of the invention
  • the embodiment of the present invention provides a method for transmitting data.
  • the method includes:
  • the back pressure information is forbidding the line card to send data to the output port that has a data priority less than or equal to the back pressure priority;
  • An embodiment of the present invention provides an apparatus for transmitting data, where the apparatus includes: a current queue length obtaining module, configured to acquire a current queue length of a queue corresponding to the output port, and a back pressure information generating module, configured to: when the current queue length meets a back pressure condition, according to the current queue length, and preset Corresponding relationship between the queue length and the back pressure priority, determining the back pressure priority corresponding to the current queue length, and generating back pressure information, wherein the back pressure information is forbidding the line card to send data priority to the output port is less than or equal to The back pressure priority data;
  • a back pressure information sending module configured to send the back pressure information to the line card, and after the line card receives the back pressure information, stop sending data priority to the output port that is less than or equal to the back pressure priority data.
  • Embodiments of the present invention provide a system for transmitting data, where the system includes: a line card and a device for transmitting data:
  • the line card is configured to: send data to a device that transmits data, and transmit data according to the back pressure information sent by the device that transmits the data;
  • the device for transmitting data is configured to obtain a current queue length of a queue corresponding to an output port; when the current queue length meets a back pressure condition, according to the current queue length, and a preset queue length and a back pressure priority Corresponding relationship of the level, determining a back pressure priority corresponding to the current queue length, and generating back pressure information, wherein the back pressure information is forbidding the line card to send data priority to the output port is less than or equal to the back pressure priority Level data; sending the back pressure information to the line card, and causing the line card to stop sending data with a priority of less than or equal to the back pressure priority to the output port after receiving the back pressure information.
  • the technical solution provided by the embodiment of the present invention has the following beneficial effects: generating backpressure information according to the current queue length and a preset relationship between the queue length and the priority, and sending the backpressure information to the current switching network.
  • All the line cards in the network enable the all line cards to transmit data according to the back pressure information, thereby reducing a large amount of low-priority data occupying the cache of the switching network for a long time, thereby increasing the number of caches reserved for higher priority.
  • the anti-burst capability of the switching network is improved, and the high-speed high throughput of the switching network is increased.
  • Embodiment 1 is a flowchart of a method for transmitting data provided in Embodiment 1 of the present invention
  • Embodiment 2 is a flowchart of another method for transmitting data provided in Embodiment 2 of the present invention.
  • FIG. 3 is a schematic diagram of a transmission data network provided in Embodiment 2 of the present invention
  • 4 is a schematic structural diagram of a transmission data apparatus according to Embodiment 3 of the present invention
  • FIG. 5 is a schematic structural diagram of another transmission data apparatus provided in Embodiment 3 of the present invention
  • FIG. 6 is a transmission provided in Embodiment 4 of the present invention
  • an embodiment of the present invention provides a method for transmitting data, where the method includes: S101: Obtain a current queue length of a queue corresponding to an output port;
  • S103 Send the back pressure information to the line card, and after the line card receives the back pressure information, stop sending data with a data priority less than or equal to the back pressure priority to the output port.
  • the current queue length when the current queue length meets the back pressure condition (for example, when congestion occurs), the current queue length is determined according to the current queue length and the preset relationship between the queue length and the back pressure priority. Corresponding back pressure priority, and generating back pressure information, wherein the back pressure information is forbidding that all line cards send data with a data priority less than or equal to the back pressure priority to the output port, so that the line After receiving the back pressure information, the card stops sending data that is less than or equal to the back pressure priority to the output port, and reduces a large amount of low-priority data to occupy the cache of the switching network for a long time, thereby leaving a higher priority
  • the level of cache is increased accordingly, which improves the bursting capability of the switching network and increases the high throughput of the switching network.
  • each output port of the switching network uses a single queue to store data received by the port, since the queue outputs the stored data by using the first-in-first-out principle, the data is stranded in the switching network, and the time is shortened, thereby reducing the connection with the switching network.
  • the sorting/recombining resources of the downstream reorganization module improve the sorting/recombination ability of the reassembly module.
  • an embodiment of the present invention provides a method for transmitting data, where the method includes: S201: The line card sends data, where the data includes an output port to which the data is to be reached to the switching network;
  • the line card uses p*n queues, and SP (strict priority) scheduling is used between the p queues of the same line card and the same line.
  • p is the number of queue priorities, that is, the line card is set to set a priority for the data, and there is a queue for storing the data of the priority
  • n is the number of exits of each line card.
  • Both the line card 1 and the line card m have a port 1 output that is sent to the switching network.
  • the line card 1 is low priority traffic, the priority level is p, and the corresponding queue is Qlp; the line card m is high priority traffic, the priority level is 1 , and the corresponding queue is Q11.
  • the switching network receives the data sent by the line card and the output port to which the data is to be reached. Specifically, the switching network stores the data to the queue corresponding to the output port according to the output port specified by the data.
  • only one queue is configured for each output port of the switching network.
  • the switching network After receiving the data sent by the line card, the switching network acquires the output port specified by the data, and stores the data to the port. Output queue.
  • the line card 1 sends the data Data1, and specifies that the data is outputted by the output port 1 of the switching network.
  • the switching network stores the data 1 to the queue Q1 corresponding to the output port 1.
  • the line card m sends the data Data M.
  • the data is designated to be output by the output port 1 of the switching network, and the switching network stores the data 1 to the queue Q1 corresponding to the output port 1.
  • S203 The switching network acquires a current queue length of the queue corresponding to the output port.
  • the switching network determines the back pressure priority corresponding to the current queue length according to the current queue length and the correspondence between the preset queue length and the back pressure priority, and Generate back pressure information.
  • the back pressure information is data for prohibiting the line card from transmitting the data priority to the output port that is less than or equal to the back pressure priority.
  • the preset relationship between the queue length and the back pressure priority is a correspondence between the queue length value and the back pressure priority.
  • the S204 may be specifically: the switching network queries the correspondence between the queue length value and the back pressure priority according to the current queue length, when there is the same length as the current queue length. When the queue length value is determined, it is determined that the current queue length satisfies the back pressure condition. At this time, the switching network obtains the back pressure priority corresponding to the current queue length value, and generates back pressure information, prohibiting all line cards connected to the switching network. The output port sends backpressure information of data whose priority is less than or equal to the corresponding back pressure priority.
  • the corresponding relationship between the preset queue length and the back pressure priority is as shown in Table 1.
  • the corresponding relationship between the preset queue length and the back pressure priority is as follows. In the corresponding relationship shown in Table 1, there is a queue length that is the same as the current queue length, that is, there is L1; the switching network obtains the corresponding L1 according to L1.
  • the back pressure priority is 1 and generates back pressure information, which prohibits all line cards from transmitting data with a priority of less than or equal to n to output port 1.
  • the corresponding relationship between the queue length and the back pressure priority may also be a correspondence between the queue length interval and the back pressure priority.
  • the S204 may further be: the exchange network queries the correspondence between the queue length interval and the back pressure priority. When there is a queue length interval including the current queue length, it determines that the current queue length satisfies the back pressure condition. The queue length interval in which the current queue length is located, and further obtains a back pressure priority corresponding to the queue length interval in which the current queue length is located, and generates back pressure information, prohibiting all line cards connected to the switching network from being sent to the output port The back pressure information of the data whose priority is less than or equal to the corresponding back pressure priority.
  • the queue Q1 corresponding to the switching network port 1 has a T1 to TP queue length interval, and the current queue length of the queue falls within the queue interval ⁇ 3, and the priority corresponding to the queue length interval ⁇ 3 is 3.
  • the number of the back pressure priority is less than or equal to the priority of the data.
  • the priority is one or more of the data priorities sent by the line card connected to the switching network, each priority has a queue length and one of the priorities A correspondence, that is, when there is a queue length, there is a data priority corresponding thereto; when there are multiple queue lengths, there are multiple data priorities corresponding to the respective queue lengths.
  • the queue Q1 of the output port 1 of the switching network has T 1 ⁇ TP queue lengths corresponding to the respective priorities, that is, the switching network.
  • the priority of the queue queue of the output port queue, and the priority of the data sent by the line card are - corresponding.
  • the mapping relationship between the queue length interval and the priority of the queue may be formed by the mapping relationship between each queue length and the priority.
  • the switching network sends the backpressure information to all the line cards, and all the line cards connected to the switching network receive the back pressure information sent by the switching network and transmit the data to the switching network according to the back pressure information.
  • the switching network sends back to all the line cards connected thereto to prohibit all line cards from transmitting backpressure information to the output port with data whose priority is less than or equal to the corresponding priority.
  • the switching network when the generated back pressure information prohibits all line cards from transmitting data with a priority less than or equal to 3 to the port 1, the switching network sends the back pressure information to the line card 1 to the line card m, prohibiting The line card 1 to the line card m transmit data having a priority of less than or equal to 3; after receiving the back pressure information, the line card 1 to the line card m stop transmitting data having a priority of less than or equal to 3 to the port 1.
  • each output port of the switching network sequentially outputs data stored in its corresponding queue.
  • each output port of the switching network acquires data from its corresponding queue according to the first-in-first-out principle, and sends the data out.
  • the specific sequence of the S201-S202 in this embodiment is not limited to S203, that is, the current queue length of the output port corresponding to the output port obtained by the embodiment S203, that is, the current switching network may be received.
  • the length of the queue of the corresponding queue stored in the corresponding queue may be the queue length of the corresponding queue after being stored in the corresponding queue.
  • step S203 the current queue length in step S203 is a queue in which the received data is not added to the output port queue. length. If the current queue length meets the back pressure condition, step S204 is performed; if the front queue length does not satisfy the back pressure condition, step S202 is performed, and the process is repeated.
  • the output port sends data whose data priority is less than or equal to the back pressure priority, so that the line card After receiving the back pressure information, stop sending data that is less than or equal to the back pressure priority to the output port, and reduce a large amount of low-priority data to occupy the cache of the switching network for a long time, thereby leaving a higher priority.
  • the corresponding cache is increased accordingly, thereby improving the anti-burst capability of the switching network and increasing the high throughput of the switching network with high priority. Further, since each output port of the switching network uses a single queue to store data received by the port, since the queue outputs the stored data by using the first-in-first-out principle, the data is stranded in the switching network, and the time is shortened, thereby reducing the switching network.
  • the sorting/recombination resources of the connected downlink reassembly module improve the sorting/recombination capability of the reassembly module.
  • an embodiment of the present invention provides an apparatus for transmitting data, where the apparatus includes: a current queue length obtaining module 301, configured to acquire a current queue length of a queue corresponding to an output port;
  • the back pressure information generating module 302 is configured to determine a back pressure priority corresponding to the current queue length according to the current queue length and a preset relationship between the queue length and the priority when the current queue length meets the back pressure condition. Level, and generating back pressure information, the back pressure information is forbidding the line card to send data with a data priority less than or equal to the back pressure priority to the output port;
  • the back pressure information sending module 303 is configured to send the back pressure information to the line card, and after the line card receives the back pressure information, stop sending data priority to the output port to be less than or equal to the back pressure priority The data.
  • the back pressure priority corresponding to the current queue length is determined according to the current queue length and the corresponding relationship between the preset queue length and the back pressure priority. And generating back pressure information, wherein the back pressure information is forbidding, by the line card, to send data with a data priority lower than or equal to the back pressure priority to the output port, so that the line card receives the back pressure
  • the data that is less than or equal to the back pressure priority is sent to the output port, and the cache of the switching network is occupied by a large number of low-priority data for a long time, so that the cache reserved for the higher priority is correspondingly increased.
  • the anti-burst capability of the switching network is improved, and the high-speed high throughput of the switching network is increased.
  • each output port of the switching network uses a single queue to store data received by the port, since the queue outputs the stored data by using the first-in-first-out principle, the data is stranded in the switching network, and the time is shortened, thereby reducing and exchanging.
  • the sorting/recombination resources of the downlink reassembly module of the network connection improve the sorting/recombination capability of the reassembly module.
  • an embodiment of the present invention further provides an apparatus for transmitting data, where the apparatus includes: a current queue length obtaining module 301, configured to acquire a current queue length of a queue corresponding to an output port;
  • the back pressure information generating module 302 is configured to determine a back pressure priority corresponding to the current queue length according to the current queue length and a preset relationship between the queue length and the priority when the current queue length meets the back pressure condition. Level, and generating back pressure information, the back pressure information is forbidding the line card to send data with a data priority less than or equal to the back pressure priority to the output port;
  • the back pressure information sending module 303 is configured to send the back pressure information to the line card, and after the line card receives the back pressure information, stop sending data priority to the output port to be less than or equal to the back pressure priority The data.
  • the number of the back pressure priorities is less than or equal to the number of the data priorities.
  • the line card uses a priority scheduling mechanism to select to send data in the queues having different priorities.
  • the preset relationship between the queue length and the back pressure priority is a correspondence between a queue length value and a back pressure priority, or a correspondence between a queue length interval and a back pressure priority.
  • the back pressure information generating module 302 specifically includes:
  • the back pressure priority obtaining unit 3021 corresponding to the queue length value is used to query the corresponding relationship, and obtain a back pressure priority corresponding to the current queue length value;
  • the back pressure information generating module 302 specifically includes:
  • the back pressure priority obtaining unit 3022 corresponding to the queue length interval is configured to query the corresponding relationship, and obtain a back pressure priority corresponding to the queue length interval in which the current queue length is located.
  • the device further includes:
  • the data receiving module 304 is configured to receive data sent by the line card, where the data includes an output port to which the data is to be reached;
  • the data storage module 305 is configured to store the data to a queue corresponding to the output port.
  • the back pressure priority corresponding to the current queue length is determined according to the current queue length and the corresponding relationship between the preset queue length and the back pressure priority. And generating back pressure information, wherein the back pressure information is forbidding, by the line card, to send data with a data priority lower than or equal to the back pressure priority to the output port, so that the line card receives the back pressure
  • the data that is less than or equal to the back pressure priority is sent to the output port, and the cache of the switching network is occupied by a large number of low-priority data for a long time, so that the cache reserved for the higher priority is correspondingly increased.
  • the anti-burst capability of the switching network is improved, and the high-speed high throughput of the switching network is increased.
  • each output port of the switching network uses a single queue to store data received by the port, since the queue outputs the stored data by using the first-in-first-out principle, the data is stranded in the switching network, and the time is shortened, thereby reducing the switching network.
  • the sorting/recombination resources of the connected downlink reassembly module improve the sorting/recombination capability of the reassembly module.
  • an embodiment of the present invention provides a system for transmitting data, the system comprising: a line card 401 and a device for transmitting data 402:
  • the line card 401 is configured to: send data to a device that transmits data, and transmit data according to the back pressure information sent by the device that transmits the data;
  • the device 402 for transmitting data is configured to obtain a current queue length of the queue corresponding to the output port; when the current queue length satisfies a back pressure condition, according to the current queue length, and a preset queue length and a back pressure priority Corresponding relationship, determining a back pressure priority corresponding to the current queue length, and generating back pressure information, wherein the back pressure information is forbidding the line card to send data priority to the output port is less than or equal to the back pressure priority And sending the back pressure information to the line card, and after the line card receives the back pressure information, stopping sending data with a data priority less than or equal to the back pressure priority to the output port.
  • the back pressure priority corresponding to the current queue length is determined according to the current queue length and the corresponding relationship between the preset queue length and the back pressure priority. And generating back pressure information, wherein the back pressure information is forbidding, by the line card, to send data with a data priority lower than or equal to the back pressure priority to the output port, so that the line card receives the back pressure Stop transmitting to the output port a number less than or equal to the back pressure priority after the information
  • a large number of low-priority data are used to occupy the cache of the switching network for a long time, so that the cache reserved for higher priority is correspondingly increased, thereby improving the anti-burst capability of the switching network and increasing the high priority of the switching network.
  • each output port of the switching network uses a single queue to store data received by the port, since the queue outputs the stored data by using the first-in-first-out principle, the data is stranded in the switching network, and the time is shortened, thereby reducing the switching network.
  • the sorting/recombination resources of the connected downlink reassembly module improve the sorting/recombination capability of the reassembly module.
  • All or part of the technical solutions provided by the above embodiments may be implemented by software programming, and the software program is stored in a readable storage medium such as a hard disk, a optical disk or a floppy disk in a computer.

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  • Computer Networks & Wireless Communication (AREA)
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Description

传输数据的方法、 装置和系统 本申请要求于 2010 年 11 月 12 日提交中国专利局、 申请号为 201010548381.9、 发明名称为 "传输数据的方法、 装置和系统" 的中国专利申 请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及数据传输技术领域， 特别涉及一种传输数据的方法、 装置和系 统。 背景技术
目前， 大容量、 高吞吐率的分組交换通信系统中， 线卡和交换网间的信息 传输通常釆用队列反压机制， 即由交换网检测各输出端口的数据发送情况， 当 该输出端口出现拥塞时， 交换网则产生反压信息， 通知所有线卡停止向该输出 端口发送数据。 如果两个不同业务等级的数据流是分别来自两个不同的线卡， 它们将同时被停止发送， 业务等级较高的数据流也不能优先的被发送出去。 因 此， 如何保证高业务等级数据流的有效传输已成为分组交换通信的主要解决的 技术问题。 发明内容
为了增加高优先级数据的緩存空间， 进而提高交换网高优先级的高吞吐量， 本发明实施例提供了一种传输数据的方法。 所述方法包括：
获取与输出端口对应的队列的当前队列长度；
当所述当前队列长度满足反压条件时， 根据所述当前队列长度、 和预先设 置的队列长度与反压优先级的对应关系， 确定当前队列长度对应的反压优先级， 并生成反压信息， 所述反压信息为禁止线卡向所述输出端口发送数据优先级小 于或等于所述反压优先级的数据；
发送所述反压信息给线卡， 使所述线卡接收所述反压信息后停止向所述输 出端口发送数据优先级小于或等于所述反压优先级的数据。
本发明实施例提供了一种传输数据的装置， 所述装置包括： 当前队列长度获取模块， 用于获取与输出端口对应的队列的当前队列长度； 反压信息生成模块， 用于当所述当前队列长度满足反压条件时， 根据所述 当前队列长度、 和预先设置的队列长度与反压优先级的对应关系， 确定当前队 列长度对应的反压优先级， 并生成反压信息， 所述反压信息为禁止线卡向所述 输出端口发送数据优先级小于或等于所述反压优先级的数据；
反压信息发送模块， 用于发送所述反压信息给线卡， 使所述线卡接收所述 反压信息后停止向所述输出端口发送数据优先级小于或等于所述反压优先级的 数据。
本发明实施例提供了一种传输数据的系统， 所述系统包括： 线卡和传输数 据的装置：
所述线卡用于， 向传输数据的装置发送数据， 并根据所述传输数据的装置 发送的反压信息传输数据；
所述传输数据的装置用于， 获取与输出端口对应的队列的当前队列长度； 当所述当前队列长度满足反压条件时， 根据所述当前队列长度、 和预先设置的 队列长度与反压优先级的对应关系， 确定当前队列长度对应的反压优先级， 并 生成反压信息， 所述反压信息为禁止所述线卡向所述输出端口发送数据优先级 小于或等于所述反压优先级的数据； 发送所述反压信息给线卡， 使所述线卡接 收所述反压信息后停止向所述输出端口发送数据优先级小于或等于所述反压优 先级的数据。
本发明实施例提供的技术方案带来的有益效果是： 根据所述当前队列长度 和预先设置的队列长度与优先级的对应关系生成反压信息， 并将所述反压信息 发送至当前交换网中的所有线卡， 使所述所有线卡根据所述反压信息传输数据， 减少了大量低优先级的数据长期的占用交换网的緩存， 从而使留给较高优先级 的緩存相应增多， 进而提高了交换网的抗突发能力， 增加了交换网高优先级的 高吞吐量。 附图说明
图 1是本发明实施例 1中提供的传输数据的方法流程图；
图 2是本发明实施例 2中提供的另一传输数据的方法流程图；
图 3是本发明实施例 2中提供的传输数据网络示意图； 图 4是本发明实施例 3中提供的传输数据装置的结构示意图； 图 5是本发明实施例 3中提供的另一传输数据装置的结构示意图； 图 6是本发明实施例 4中提供的传输数据装置的系统示意图。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚， 下面将结合附图对本发明 实施方式作进一步地详细描述。
实施例 1
如图 1所示， 本发明实施例提供了一种传输数据的方法， 该方法包括： S101 : 获取与输出端口对应的队列的当前队列长度；
S102: 当所述当前队列长度满足反压条件时， 根据所述当前队列长度、 和 预先设置的队列长度与反压优先级的对应关系， 确定当前队列长度对应的反压 优先级， 并生成反压信息， 所述反压信息为禁止线卡向所述输出端口发送数据 优先级小于或等于所述反压优先级的数据；
S103 : 发送所述反压信息给线卡， 使所述线卡接收所述反压信息后停止向 所述输出端口发送数据优先级小于或等于所述反压优先级的数据。
本发明实施例， 根据当所述当前队列长度满足反压条件时 （例如发生拥塞 时），根据所述当前队列长度、和预先设置的队列长度与反压优先级的对应关系， 确定当前队列长度对应的反压优先级， 并生成反压信息， 所述反压信息为禁止 所述所有线卡向所述输出端口发送数据优先级小于或等于所述反压优先级的数 据， 使所述线卡接收所述反压信息后停止向所述输出端口发送小于或等于所述 反压优先级的数据， 减少了大量低优先级的数据长期的占用交换网的緩存， 从 而使留给较高优先级的緩存相应增多， 进而提高了交换网的抗突发能力， 增加 了交换网高优先级的高吞吐量。 进一步的， 由于交换网各输出端口采用单一队 列存储该端口接收到的数据， 由于队列采用先进先出原则输出其存储的数据， 使数据滞留在交换网是时间缩短， 从而减少了与交换网连接的下行重组模块的 排序 /重组的资源， 提高了重组模块的排序 /重组能力降低。 实施例 2 ,
如图 2所示， 本发明实施例提供了一种传输数据的方法， 该方法包括： S201 : 线卡发送数据， 所述数据中包含所述数据将要到达的输出端口至交 换网；
数据。
例如， 如图 3所示， 线卡使用 p*n个队列， 对应线卡同一个出口的 p个队 列之间使用 SP ( strict priority, 严格优先级）调度。 其中， p为队列优先级的个 数， 即线卡设置为数据设置一个优先级就存在一个队列用于存储该优先级的数 据； n为每个线卡的出口数
线卡 1和线卡 m都有流量发往交换网的端口 1输出。 其中， 线卡 1的是低 优先级流量， 优先等级为 p， 对应队列为 Qlp; 线卡 m的是高优先级流量， 优 先等级为 1 , 对应队列为 Qll。
S202: 交换网接收线卡发送的数据以及所述数据将要到达的输出端口； 具体的， 交换网根据所述数据指定的输出端口， 将所述数据存储至所述输 出端口对应的队列。
例如， 如图 3所示， 交换网的每个输出端口只配置 1个队列， 交换网在接 收到线卡发送的数据后， 获取该数据指定的输出端口， 并将该数据存储至该端 口对应的输出队列。 线卡 1发送了数据 Datal， 并指定该数据由交换网的输出端 口 1输出， 则交换网将该数据 1存储至输出端口 1对应的队列 Q1 ; 同理， 线卡 m发送了数据 Data M , 并指定该数据由交换网的输出端口 1输出， 则交换网将 该数据 1存储至输出端口 1对应的队列 Ql。
S203： 交换网获取与输出端口对应的队列的当前队列长度；
S204: 当所述当前队列长度满足反压条件时， 交换网根据所述当前队列长 度、 和预先设置的队列长度与反压优先级的对应关系， 确定当前队列长度对应 的反压优先级， 并生成反压信息。
其中， 所述反压信息为禁止线卡向所述输出端口发送数据优先级小于或等 于所述反压优先级的数据。
可选的， 预先设置的所述队列长度与反压优先级的对应关系为， 队列长度 值与反压优先级的对应关系。 则 S204具体可以为： 交换网根据所述当前队列长 度， 查询队列长度值与反压优先级的对应关系， 当存在与当前队列长度相同的 队列长度值时， 则判定当前队列长度满足反压条件， 此时， 交换网获取与当前 队列长度值对应的反压优先级， 并生成反压信息， 禁止所有与交换网连接的线 卡向所述输出端口发送优先级小于或等于所述对应反压优先级的数据的反压信 息。
例如， 当交换网获取到的输出端口 1对应的队列 Q 1 当前的队列长度为 L1 时， 预先设置的队列长度与反压优先级的对应关系如表一所示， 则交换网通过 查询如表一所示的预先设置的队列长度与反压优先级的对应关系， 获取表一所 示的对应关系中存在与当前队列长度相同的队列长度， 即存在 L1 ; 交换网根据 L1获取到与 L1对应的反压优先级为 1 , 并生成反压信息， 该反压信息为禁止所 有线卡向输出端口 1发送数据优先级小于或等于 n的数据。
表一：
Figure imgf000007_0001
进一步可选的， 预先设置的所述队列长度与反压优先级的对应关系还可以 为队列长度区间与反压优先级的对应关系。 则 S204具体还可以为： 交换网查询 队列长度区间与反压优先级的对应关系， 当存在包括当前队列长度的队列长度 区间时， 则判定当前队列长度满足反压条件， 此时， 获取所述当前队列长度所 在的队列长度区间， 进而获取与所述当前队列长度所在的队列长度区间对应的 反压优先级， 并生成反压信息， 禁止所有与交换网连接的线卡向所述输出端口 发送优先级小于或等于所述对应反压优先级的数据的反压信息。
例如， 如图 3所示， 与交换网端口 1对应的队列 Q1存在 T1~TP个队列长 度区间， 该队列当前的队列长度落在队列区间 Τ3， 则获取到队列长度区间 Τ3 对应的优先级为 3。
其中， 预先设置的队列长度值与反压优先级的对应关系中， 所述反压优先 级的个数小于等于所述数据的优先级的个数。 该优先级， 为与该交换网连接的 线卡发送的数据优先级中的一个或多个， 每个优先级都有一个队列长度与其一 一对应， 即当存在一个队列长度时， 则有一个数据优先级与其对应； 当存在多 个队列长度时则存在多个数据优先级与各个队列长度一一对应。 优选的， 如图 3 所示， 如果线卡为数据设置了 p个优先级， 则在交换网输出端口 1的队列 Q1则 存在 T 1 ~TP个队列长度与各个优先级对应， 即与交换网输出端口队列的队列长 队对应的优先级， 以及线卡发送的数据的优先级是——对应的。 进一步的， 可 由各个队列长度与优先级的映射关系组成该队列的队列长度区间与优先级的映 射关系集。
进一步的， 交换网发送该反压信息至所有线卡， 所有与该交换网连接的线 卡接收交换网发送的反压信息并根据所述反压信息向交换网传输数据。
具体的， 交换网向与其连接的所有线卡发送禁止所有线卡向所述输出端口 发送优先级小于或等于所述对应优先级的数据的反压信息。
例如， 如图 3所示， 当生成的反压信息为禁止所有线卡向端口 1发送优先 级小于或等于 3的数据时， 交换网向线卡 1〜线卡 m发送该反压信息， 禁止线卡 1〜线卡 m发送优先级小于或等于 3的数据；线卡 1〜线卡 m接收该反压信息后停 止向端口 1发送优先级小于或等于 3的数据。
同时， 交换网各个输出端口顺序输出存储于与其对应的队列中的数据。 可 选的， 交换网各个输出端口按先进先出原则， 从与其对应的队列中获取数据， 并将数据发送出去。
另外， 本发明实施例 S201- S202在本实施例中的具体顺序并不限定于 S203 之前， 即本发明实施例 S203获取的输出端口对应队列的当前队列长度， 即可以 是将当前交换网接收到的数据存入该对应队列前的该对应队列的队列长度， 也 可以是存入该对应队列之后的该对应队列的队列长度。
所以可选地， 上述步骤 S201和 S202可以不在步骤 S203前进行， 即本实施 例的方法可以直接步骤 S203开始， 这时步骤 S203 中当前队列长度就是未将接 收到的数据加入输出端口队列的队列长度。 如果当前队列长度满足反压条件时 执行步骤 S204; 如果前队列长度不满足反压条件， 执行步骤 S202 , 重复流程； 本发明实施例， 根据当所述当前队列长度满足反压条件时， 根据所述当前 队列长度、 和预先设置的队列长度与反压优先级的对应关系， 确定当前队列长 度对应的反压优先级， 并生成反压信息， 所述反压信息为禁止所述所有线卡向 所述输出端口发送数据优先级小于或等于所述反压优先级的数据， 使所述线卡 接收所述反压信息后停止向所述输出端口发送小于或等于所述反压优先级的数 据， 减少了大量低优先级的数据长期的占用交换网的緩存， 从而使留给较高优 先级的緩存相应增多， 进而提高了交换网的抗突发能力， 增加了交换网高优先 级的高吞吐量。 进一步的， 由于交换网各输出端口釆用单一队列存储该端口接 收到的数据， 由于队列采用先进先出原则输出其存储的数据， 使数据滞留在交 换网是时间缩短，从而减少了与交换网连接的下行重组模块的排序 /重组的资源， 提高了重组模块的排序 /重组能力降低。 实施例 3 ,
如图 4所示， 本发明实施例提供了一种传输数据的装置， 该装置包括： 当前队列长度获取模块 301 ,用于获取与输出端口对应的队列的当前队列长 度；
反压信息生成模块 302， 用于当所述当前队列长度满足反压条件时， 根据所 述当前队列长度、 和预先设置的队列长度与 优先级的对应关系， 确定当前 队列长度对应的反压优先级， 并生成反压信息， 所述反压信息为禁止线卡向所 述输出端口发送数据优先级小于或等于所述反压优先级的数据；
反压信息发送模块 303 , 用于发送所述反压信息给线卡， 使所述线卡接收所 述反压信息后停止向所述输出端口发送数据优先级小于或等于所述反压优先级 的数据。
本发明实施例， 根据当所述当前队列长度满足反压条件时， 根据所述当前 队列长度、 和预先设置的队列长度与反压优先级的对应关系， 确定当前队列长 度对应的反压优先级， 并生成反压信息， 所述反压信息为禁止所述所有线卡向 所述输出端口发送数据优先级小于或等于所述反压优先级的数据， 使所述线卡 接收所述反压信息后停止向所述输出端口发送小于或等于所述反压优先級的数 据， 减少了大量低优先级的数据长期的占用交换网的緩存， 从而使留给较高优 先级的緩存相应增多， 进而提高了交换网的抗突发能力， 增加了交换网高优先 级的高吞吐量。 进一步的， 由于交换网各输出端口釆用单一队列存储该端口接 收到的数据， 由于队列釆用先进先出原则输出其存储的数据， 使数据滞留在交 换网是时间缩短，从而减少了与交换网连接的下行重组模块的排序 /重组的资源， 提高了重组模块的排序 /重组能力降低。 实施例 4，
如图 5所示， 本发明实施例还提供了一种传输数据的装置， 该装置包括： 当前队列长度获取模块 301 ,用于获取与输出端口对应的队列的当前队列长 度；
反压信息生成模块 302, 用于当所述当前队列长度满足反压条件时， 根据所 述当前队列长度、 和预先设置的队列长度与 优先级的对应关系， 确定当前 队列长度对应的反压优先级， 并生成反压信息， 所述反压信息为禁止线卡向所 述输出端口发送数据优先级小于或等于所述反压优先级的数据；
反压信息发送模块 303 , 用于发送所述反压信息给线卡， 使所述线卡接收所 述反压信息后停止向所述输出端口发送数据优先级小于或等于所述反压优先级 的数据。
优选的， 所述预先设置的队列长度与反压优先级的对应关系中， 所述反压 优先级的个数小于等于所述数据优先级的个数。 先级的数据， 所述线卡采用优先级调度机制选择发送所述具有不同优先级的队 列中的数据。
可选的， 预先设置的所述队列长度与反压优先级的对应关系为， 队列长度 值与反压优先级的对应关系， 或者队列长度区间与反压优先级的对应关系。
当预先设置的所述队列长度与反压优先级的对应关系为队列长度值与反压 优先级的对应关系时， 反压信息生成模块 302具体还包括：
队列长度值对应的反压优先级获取单元 3021 , 用于查询所述对应关系， 获 取与所述当前队列长度值对应的反压优先级；
当预先设置的所述队列长度值与反压优先级的对应关系为队列长度区间与 反压优先级的对应关系时， 反压信息生成模块 302具体还包括：
队列长度区间对应的反压优先级获取单元 3022, 用于查询所述对应关系， 获取与所述当前队列长度所在的队列长度区间对应的反压优先级。
可选的， 所述装置还包括 ：
数据接收模块 304, 用于接收线卡发送的数据， 所述数据中包含所述数据将 要到达的输出端口； 数据存储模块 305 , 用于将所述数据存储至所述输出端口对应的队列。
本发明实施例， 根据当所述当前队列长度满足反压条件时， 根据所述当前 队列长度、 和预先设置的队列长度与反压优先级的对应关系， 确定当前队列长 度对应的反压优先级， 并生成反压信息， 所述反压信息为禁止所述所有线卡向 所述输出端口发送数据优先级小于或等于所述反压优先级的数据， 使所述线卡 接收所述反压信息后停止向所述输出端口发送小于或等于所述反压优先级的数 据， 减少了大量低优先级的数据长期的占用交换网的緩存， 从而使留给较高优 先级的緩存相应增多， 进而提高了交换网的抗突发能力， 增加了交换网高优先 级的高吞吐量。 进一步的， 由于交换网各输出端口釆用单一队列存储该端口接 收到的数据， 由于队列采用先进先出原则输出其存储的数据， 使数据滞留在交 换网是时间缩短，从而减少了与交换网连接的下行重组模块的排序 /重组的资源， 提高了重组模块的排序 /重组能力降低。 实施例 5，
如图 6 所示， 本发明实施例提供了一种传输数据的系统， 该系统包括： 线 卡 401和传输数据的装置 402:
所述线卡 401 用于， 向传输数据的装置发送数据， 并根据所述传输数据的 装置发送的反压信息传输数据；
传输数据的装置 402 用于， 获取与输出端口对应的队列的当前队列长度； 当所述当前队列长度满足反压条件时， 根据所述当前队列长度、 和预先设置的 队列长度与反压优先级的对应关系， 确定当前队列长度对应的反压优先级， 并 生成反压信息， 所述反压信息为禁止所述线卡向所述输出端口发送数据优先级 小于或等于所述反压优先级的数据； 发送所述反压信息给线卡， 使所述线卡接 收所述反压信息后停止向所述输出端口发送数据优先级小于或等于所述反压优 先级的数据。
本发明实施例， 根据当所述当前队列长度满足反压条件时， 根据所述当前 队列长度、 和预先设置的队列长度与反压优先级的对应关系， 确定当前队列长 度对应的反压优先级， 并生成反压信息， 所述反压信息为禁止所述所有线卡向 所述输出端口发送数据优先级小于或等于所述反压优先级的数据， 使所述线卡 接收所述反压信息后停止向所述输出端口发送小于或等于所述反压优先级的数 据， 减少了大量低优先级的数据长期的占用交换网的緩存， 从而使留给较高优 先级的緩存相应增多， 进而提高了交换网的抗突发能力， 增加了交换网高优先 级的高吞吐量。 进一步的， 由于交换网各输出端口釆用单一队列存储该端口接 收到的数据， 由于队列采用先进先出原则输出其存储的数据， 使数据滞留在交 换网是时间缩短，从而减少了与交换网连接的下行重组模块的排序 /重组的资源， 提高了重组模块的排序 /重组能力降低。
以上实施例提供的技术方案中的全部或部分内容可以通过软件编程实现， 其软件程序存储在可读取的存储介质中， 存储介质例如： 计算机中的硬盘、 光 盘或软盘。
以上所述仅为本发明的较佳实施例， 并不用以限制本发明， 凡在本发明的 精神和原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的 保护范围之内。

Claims

权 利 要 求 书
1、 一种传输数据的方法， 其特征在于， 所述方法包括：
获取与输出端口对应的队列的当前队列长度；
当所述当前队列长度满足反压条件时， 根据所述当前队列长度、 和预先设 置的队列长度与反压优先级的对应关系， 确定当前队列长度对应的反压优先级， 并生成反压信息， 所述反压信息为禁止线卡向所述输出端口发送数据优先级小 于或等于所述反压优先级的数据；
发送所述反压信息给线卡， 使所述线卡接收所述反压信息后停止向所述输 出端口发送数据优先级小于或等于所述反压优先级的数据。
2、 根据权利要求 1所述的方法， 其特征在于， 预先设置的所述队列长度与 反压优先级的对应关系为， 队列长度值与反压优先级的对应关系， 或者队列长 度区间与反压优先级的对应关系。
3、 根据权利要求 2所述的方法， 其特征在于， 如果预先设置的所述队列长 度与反压优先级的对应关系为队列长度值与反压优先级的对应关系， 则所述确 定当前队列长度对应的反压优先级具体包括： 查询所述对应关系， 获取与所述 当前队列长度值对应的反压优先级；
如果预先设置的所述队列长度值与反压优先级的对应关系为队列长度区间 与反压优先级的对应关系， 则所述确定当前队列长度对应的反压优先级具体包 括： 查询所述对应关系， 获取与所述当前队列长度所在的队列长度区间对应的 反压优先级。
4、 根据权利要求 1所述的方法， 其特征在于， 所述预先设置的队列长度与 反压优先级的对应关系中， 所述反压优先级的个数小于等于所述数据优先级的 个数。
5、 根据权利要求 1所述的方法， 其特征在于， 在所述获取与输出端口对应 队列的当前队列长度之前包括接收线卡发送的数据， 所述数据中包含所述数据 将要到达的输出端口；
将所述数据存储至所述输出端口对应的队列。
6、 一种传输数据的装置， 其特征在于， 所述装置包括：
当前队列长度获取模块， 用于获取与输出端口对应的队列的当前队列长度； 反压信息生成模块， 用于当所述当前队列长度满足反压条件时， 根据所述 当前队列长度、 和预先设置的队列长度与反压优先级的对应关系， 确定当前队 列长度对应的反压优先级， 并生成反压信息， 所述反压信息为禁止线卡向所述 输出端口发送数据优先级小于或等于所述反压优先级的数据；
反压信息发送模块， 用于发送所述反压信息给线卡， 使所述线卡接收所述 反压信息后停止向所述输出端口发送数据优先级小于或等于所述反压优先级的 数据。
7、 根据权利要求 6所述的装置， 其特征在于， 预先设置的所述队列长度与 反压优先级的对应关系为， 队列长度值与反压优先级的对应关系， 或者队列长 度区间与反压优先级的对应关系。
8、 根据权利要求 7所述的装置， 其特征在于， 如果预先设置的所述队列长 度与反压优先级的对应关系为队列长度值与反压优先级的对应关系， 则反压信 息生成模块具体还包括： 队列长度值对应的反压优先级获取单元， 用于查询所 述对应关系， 获取与所述当前队列长度值对应的反压优先级；
如果预先设置的所述队列长度值与反压优先級的对应关系为队列长度区间 与反压优先级的对应关系， 则所述反压信息生成模块具体还包括：
队列长度区间对应的反压优先级获取单元， 用于查询所述对应关系， 获取 与所述当前队列长度所在的队列长度区间对应的反压优先级。
9、 根据权利要求 6所述的装置， 其特征在于， 所述线卡使用具有不同优先 级的队列存储具有相应数据优先级的数据， 所述线卡采用优先级调度机制选择 发送所述具有不同优先级的队列中的数据。
10、 根据权利要求 6所述的装置， 其特征在于， 所述装置还包括 ： 数据接收模块， 用于接收线卡发送的数据， 所述数据中包含所述数据将要 到达的输出端口；
数据存储模块， 用于将所述数据存储至所述输出端口对应的队列。
11、 一种传输数据的系统， 其特征在于， 所述系统包括： 线卡和传输数据 的装置：
所述线卡用于， 向传输数据的装置发送数据， 并根据所述传输数据的装置 发送的反压信息传输数据；
所述传输数据的装置用于， 获取与输出端口对应队列的当前队列长度； 当 所述当前队列长度满足反压条件时， 根据所述当前队列长度、 和预先设置的队 列长度与反压优先级的对应关系， 确定当前队列长度对应的反压优先级， 并生 成反压信息， 所述反压信息为禁止所述线卡向所述输出端口发送数据优先级小 于或等于所述反压优先级的数据； 发送所述反压信息给线卡， 使所述线卡接收 所述反压信息后停止向所述输出端口发送数据优先级小于或等于所述反压优先 级的数据。
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