WO2012167750A1 - 一种上行流量控制方法、装置、级联设备及基站 - Google Patents

一种上行流量控制方法、装置、级联设备及基站 Download PDF

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Publication number
WO2012167750A1
WO2012167750A1 PCT/CN2012/076700 CN2012076700W WO2012167750A1 WO 2012167750 A1 WO2012167750 A1 WO 2012167750A1 CN 2012076700 W CN2012076700 W CN 2012076700W WO 2012167750 A1 WO2012167750 A1 WO 2012167750A1
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Prior art keywords
flow control
downlink physical
physical frame
data
uplink
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PCT/CN2012/076700
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English (en)
French (fr)
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王少瑞
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华为技术有限公司
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Publication of WO2012167750A1 publication Critical patent/WO2012167750A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control

Definitions

  • the present invention relates to the field of communications, and in particular, to an uplink traffic control method, apparatus, cascade device, and base station. Background technique
  • serial cascaded buses are commonly used.
  • SerDes Serialize and Deserialize
  • a serial cascade bus structure as shown in FIG. 1 is formed between the master device and the slave device.
  • the base station includes a radio equipment controller (REC) and a radio equipment (RE, Radio Equipment), where the radio equipment controller corresponds to the main equipment.
  • the wireless device corresponds to the slave device.
  • a commonly used flow control method in a WCDMA system is: setting a fixed basic communication bandwidth for each RE, and each RE performs flow control of its own data transmission according to the basic communication bandwidth.
  • the embodiment of the invention provides an uplink traffic control method, device, cascade device and base station, It is reasonable to allocate communication bandwidth for each slave device on the link and improve the bandwidth utilization of the communication link.
  • An aspect of the present invention provides an uplink flow control method, including:
  • the flow control flag is set in the downlink physical frame; when the slave device of the lower-level cascading device detects the downlink physical frame carrying the flow control flag , Perform flow control of uplink transmission of its own data.
  • Another aspect provides an uplink flow control method, including:
  • the flow control flag is set in the downlink physical frame, and the data uplink transmission is detected, the flow control of the data uplink transmission is performed according to the preset flow control algorithm.
  • an upstream flow control device including:
  • a setting unit configured to: when the uplink data buffer of the next-level slave device is greater than a preset congestion threshold, set a flow control flag in the downlink physical frame;
  • a sending unit configured to send the downlink physical frame that carries the flow control flag to each of the slave devices that are in the lower level, so that the slave device that is in the lower level of the cascading device to which the sending unit belongs detects the downlink physical frame carrying the flow control flag, and performs the data itself.
  • Flow control for upstream transmission configured to send the downlink physical frame that carries the flow control flag to each of the slave devices that are in the lower level, so that the slave device that is in the lower level of the cascading device to which the sending unit belongs detects the downlink physical frame carrying the flow control flag, and performs the data itself.
  • an upstream flow control device including:
  • a receiving unit configured to receive a downlink physical frame sent by the uplink device
  • the control unit is configured to detect, when the flow control flag is set in the downlink physical frame, and detect that the data uplink transmission is being performed, perform flow control of data uplink transmission according to a preset flow control algorithm.
  • Another aspect also provides a cascading device, including:
  • a setting unit configured to: when the uplink data buffer of the next-level slave device is greater than a preset congestion threshold, set a flow control flag in the downlink physical frame;
  • a sending unit configured to send the downlink physical frame that carries the flow control flag to each of the slave devices that are in the lower level, so that the slave device that is in the lower level of the cascading device to which the sending unit belongs detects the downlink physical frame carrying the flow control flag, and performs the data itself.
  • Flow control for upstream transmission Another aspect provides a base station, including: a wireless device controller REC and a wireless device RE; wherein
  • REC includes:
  • a setting unit configured to: when the uplink data buffer of the next-level slave device is greater than a preset congestion threshold, set a flow control flag in the downlink physical frame;
  • a sending unit configured to send the downlink physical frame that carries the flow control flag to each of the slave devices that are in the lower level, so that the slave device that is in the lower level of the cascading device to which the sending unit belongs detects the downlink physical frame carrying the flow control flag, and performs the data itself.
  • RE includes:
  • a setting unit configured to: when the uplink data buffer of the next-level slave device is greater than a preset congestion threshold, set a flow control flag in the downlink physical frame;
  • a sending unit configured to send the downlink physical frame that carries the flow control flag to each of the slave devices that are in the lower level, so that the slave device that is in the lower level of the cascading device to which the sending unit belongs detects the downlink physical frame carrying the flow control flag, and performs the data itself.
  • Flow control for upstream transmission The technical effects of the above technical solutions are analyzed as follows:
  • the slave device of the lower-level device when detecting that the uplink data buffer of the next-level slave device is greater than the preset congestion threshold, setting a flow control flag in the downlink physical frame; and sending the downlink physical frame carrying the flow control flag to each slave device of the lower-level device
  • the slave device of the lower-level device detects the downlink physical frame carrying the flow control flag, performs flow control of uplink data transmission of the data; thereby, it is possible to allocate communication for each slave device on the link according to the current data transmission requirement of the slave device. Bandwidth, improve the utilization of communication links.
  • FIG. 1 is a schematic structural diagram of a prior art serial cascade bus
  • FIG. 2 is a schematic flowchart of an uplink flow control method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of another uplink flow control method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of still another method for controlling an upstream flow according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of an uplink flow control apparatus according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of another uplink flow control apparatus according to an embodiment of the present invention.
  • a serial cascade bus channel in a serial cascade bus channel, three logical channels are mainly included: a user data channel, a control data channel, and a synchronization information channel.
  • the master and slave share these three logical channels.
  • the main device and the slave device transmit user plane data through the user data channel; the master device controls the data related address information by controlling the data channel to control the slave device, and the slave device feeds back control to the master device through the control data channel.
  • Data generally includes physical layer control information and high layer control information; and the synchronization information channel is used for transmitting synchronization information between the master device and the slave device.
  • the following embodiments of the present invention control the flow of the control plane by controlling the data channel.
  • FIG. 2 is a schematic flowchart of an uplink traffic control method according to an embodiment of the present invention.
  • the method may be applicable to each slave device and a master device other than the last-level slave device. As shown in FIG. 1, the method includes:
  • Step 201 When detecting that the uplink data buffer quantity of the next-level slave device is greater than a preset congestion threshold, set a flow control flag in the downlink physical frame.
  • Step 202 Send the downlink physical frame carrying the flow control flag to each slave device of the lower level, so that when the slave device of the lower level detects the downlink physical frame carrying the flow control flag, perform uplink traffic control of the data transmission.
  • the master device and each slave device detect whether the uplink traffic of the lower-level slave device is congested. When congestion occurs, the downlink physical frame carrying the traffic control flag is sent to each slave device of the lower-level device.
  • the slave device performs uplink traffic control of its own data transmission, thereby realizing fast flow control of the control plane data to the master device and each slave device while ensuring the bandwidth utilization of the communication link.
  • the embodiment of the present invention further provides another uplink traffic control method, which can be applied to each slave device.
  • the method includes:
  • Step 301 Receive a downlink physical frame sent by the uplink cascading device.
  • the cascading device in the embodiment of the present invention includes: a master device and a slave device.
  • Step 302 When the flow control flag is set in the downlink physical frame, and the data uplink transmission is detected, the flow control of the data uplink transmission is performed according to the preset flow control algorithm until the downlink physical frame is detected. Carrying the flow control tag.
  • the preset flow control algorithm may be: stopping sending, reducing the sending rate to a preset value, or a preset ratio of the original rate, such as reducing the sending rate to 1/2 of the original rate, etc., which may be used in practical applications. Self-setting, there is no limit here.
  • the uplink flow control method of the embodiment of the present invention is described in more detail by using FIG. 4, as shown in FIG. 4, the method includes:
  • Step 401 The master device and the slave devices at each level respectively detect whether the uplink data buffer of the next-level slave device is greater than a preset congestion threshold. If yes, go to step 402; otherwise, go to step 403.
  • Each of the slave devices may include two buffers (Buffers) for buffering the uplink data that the slave device needs to send; Buffer B is used for buffering the uplink data of the next-level slave device.
  • Buffers buffers for buffering the uplink data that the slave device needs to send
  • Buffer B is used for buffering the uplink data of the next-level slave device.
  • the uplink data buffer of the next-level slave device can be obtained from the Buffer B.
  • Step 402 Set a flow control flag in the downlink physical frame, and send the downlink physical frame that carries the flow control flag to each slave device in the lower level of the cascading device.
  • Step 404 is performed.
  • the flow control flag may be set in a control word of a downlink physical frame; for example, in a downlink physical frame as shown in Table 1 below, adding a p-1 subchannel in the original downlink physical frame structure.
  • the f low control" field as the flow control flag, identifies whether flow control is enabled. Table 1
  • Step 403 Cancel the flow control flag in the downlink physical frame, and send the downlink physical frame to each slave device in the lower level of the cascading device.
  • Step 404 is performed.
  • this step may also be: setting a flow control cancellation flag in the downlink physical frame, where the flow control cancellation flag is used to indicate that each slave device of the lower level stops the flow control of the uplink data that is required to be sent by itself;
  • the flow control cancellation flag may also be implemented by adding a field in the downlink physical frame, which is not described here.
  • Step 404 Each lower-level slave device receives a downlink physical frame, and detects whether the flow control flag is carried in the downlink physical frame. If yes, go to step 405; otherwise, go to step 406.
  • Step 405 Determine whether it is performing uplink transmission of data, if yes, go to step 407; otherwise, go to step 408.
  • Step 406 Determine whether it is performing uplink transmission of data. If yes, go to step 408; otherwise, the branch processing flow ends.
  • Step 407 Perform flow control of data uplink transmission according to a preset flow control algorithm, and the processing flow of the branch ends.
  • Step 408 The data uplink transmission is performed normally, and the processing flow of the branch ends.
  • step 408 there are two cases in step 408, one is that the downlink is detected before the device The traffic control flag is carried in the frame, so that the flow control of the data uplink transmission is performed by the device.
  • the implementation of this step is: canceling the flow control of the data uplink transmission, and normally performing uplink data transmission; the other is not previously It is detected that the flow control flag is carried in the downlink physical frame, so that the flow control of the data transmission is not performed by the device, the implementation of step 408 is: continue to perform normal uplink transmission of data.
  • the master device and each slave device detect whether the uplink traffic of the lower-level slave device is congested. When congestion occurs, the downlink physical frame carrying the traffic control flag is sent to each slave device of the lower-level device. Each slave device performs flow control of uplink data transmission of its own data, thereby realizing fast flow control of control plane data for each slave device while ensuring bandwidth utilization of the communication link.
  • the REC corresponds to the master device
  • the RE corresponds to the slave device
  • the interface between the REC and the RE is a Common Public Radio Interface (CPRI) interface
  • the physical frame can be a downlink physical frame of the CPRI interface.
  • the uplink flow control method in this embodiment of the present application may also be applied to systems such as Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA), and 3GPP Long Term Evolution (LTE), and details are not described herein.
  • GSM Global System for Mobile Communications
  • CDMA Code Division Multiple Access
  • LTE 3GPP Long Term Evolution
  • the embodiment of the present invention further provides a flow control device and system, which are respectively shown in FIG.
  • FIG. 5 is a schematic structural diagram of a flow control device according to an embodiment of the present invention.
  • the device may be disposed in a master device, or a slave device, or a master device and a slave device; wherein, the device may not be disposed in the last-level slave device;
  • the apparatus may include:
  • the setting unit 510 is configured to: when the uplink data buffer of the next-level slave device is greater than the preset congestion threshold, set the flow control flag in the downlink physical frame;
  • the sending unit 520 is configured to send the downlink physical frame that carries the flow control flag to each of the slave devices that are in the lower level, so that the slave device that is in the lower level of the cascading device to which the sending unit belongs detects the downlink physical frame carrying the flow control flag, and performs the self. Upstream traffic control for data transmission.
  • the setting the flow control flag in the downlink physical frame may include: setting a flow control flag in a control word of the downlink physical frame.
  • the downlink physical frame may be: a CPRI frame.
  • the setting unit is further configured to: when detecting that the uplink data buffer quantity of the next-level slave device is less than the preset congestion cancellation threshold, cancel the flow control label in the downlink physical frame sent by the lower-level slave device;
  • the sending unit may be further configured to: send the downlink physical frame that cancels the flow control flag to each of the slave devices of the lower level, so that each slave device of the lower level detects the downlink physical frame that does not carry the flow control flag, and performs normal data. Upstream transmission.
  • the setting unit may be further configured to: when detecting that the uplink data buffer of the next-level slave device is less than the preset congestion cancellation threshold, set a flow control cancellation flag in the downlink physical frame sent by the slave device to the lower level;
  • the sending unit may be further configured to: send the downlink physical frame that carries the flow control cancellation flag to each of the slave devices in the lower level, so that when the slave devices of the lower level detect the downlink physical frame that carries the flow control cancellation flag, the data is normally performed. Send upstream.
  • another upstream flow control device is provided, which can be disposed in each of the slave devices for cooperation with the device shown in FIG. 5, the device comprising:
  • the receiving unit 610 is configured to receive a downlink physical frame sent by the uplink device.
  • the cascading device may be a slave device or a master device
  • the control unit 620 is configured to detect, when the flow control flag is set in the downlink physical frame, and detect that the data uplink transmission is being performed, perform flow control of data uplink transmission according to a preset flow control algorithm.
  • the control unit 620 is further configured to: when detecting that the flow control flag is not set in the downlink physical frame, and detecting that uplink data transmission is being performed, performing normal data uplink transmission. Or,
  • the control unit 620 is further configured to: when detecting that a flow control cancellation flag is set in the downlink physical frame, and detecting that data uplink transmission is being performed, performing normal data uplink transmission.
  • the preset flow control algorithm may be: stop sending, lower the sending rate to a preset value, or a preset ratio of the original rate, for example, reduce the sending rate to 1/2 of the original rate, etc., and may be set in the actual application. There is no limit here.
  • the embodiment of the present invention further provides a cascading device for uplink traffic control, where the cascading device may include: a setting unit, configured to: when the uplink data buffer quantity of the next-level slave device is greater than a preset congestion threshold, set a flow control flag in the downlink physical frame;
  • a sending unit configured to send the downlink physical frame that carries the flow control flag to each of the slave devices that are in the lower level, so that the slave device that is in the lower level of the cascading device to which the sending unit belongs detects the downlink physical frame carrying the flow control flag, and performs the data itself.
  • Flow control for upstream transmission configured to send the downlink physical frame that carries the flow control flag to each of the slave devices that are in the lower level, so that the slave device that is in the lower level of the cascading device to which the sending unit belongs detects the downlink physical frame carrying the flow control flag, and performs the data itself.
  • the above cascade device can be a master device or a slave device.
  • the cascading device may further include: a receiving unit, configured to receive a downlink physical frame sent by the upper cascading device;
  • the control unit is configured to detect, when the flow control flag is set in the downlink physical frame, and detect that the data uplink transmission is being performed, perform flow control of data uplink transmission according to a preset flow control algorithm.
  • each slave device acts as both a slave device of the upper slave device and a slave device of the slave device of the lower slave device
  • the first slave device is As the lower-level slave device of the master device
  • the master device acts as the upper-level cascade device of the first-level slave device; therefore, the device shown in FIG. 5 can be set in each master device and the slave device, and in addition, each slave device can also be provided.
  • the device shown in Figure 6 is placed in the device to achieve flow control of the slave device over the entire communication link.
  • an embodiment of the present invention further provides a base station, including: REC and RE;
  • REC includes:
  • a setting unit configured to: when the uplink data buffer of the next-level slave device is greater than a preset congestion threshold, set a flow control flag in the downlink physical frame;
  • a sending unit configured to send the downlink physical frame that carries the flow control flag to each of the slave devices that are in the lower level, so that the slave device that is in the lower level of the cascading device to which the sending unit belongs detects the downlink physical frame carrying the flow control flag, and performs the data itself.
  • RE includes:
  • a setting unit configured to: when the uplink data buffer of the next-level slave device is greater than a preset congestion threshold, set a flow control flag in the downlink physical frame;
  • the RE may further include: a receiving unit, configured to receive a downlink physical frame sent by the upper cascading device;
  • the control unit is configured to detect, when the flow control flag is set in the downlink physical frame, and detect that the data uplink transmission is being performed, perform flow control of data uplink transmission according to a preset flow control algorithm.
  • the master device and each slave device detect whether the uplink traffic of the lower-level slave device is congested, and when the congestion occurs, the downlink physical frame carrying the traffic control flag is sent to each slave device of the lower-level device.
  • the uplink traffic control of each slave device performs its own data transmission, thereby realizing fast flow control of the control plane data for each slave device while ensuring the bandwidth utilization of the communication link.

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Abstract

本发明公开了一种上行流量控制方法、装置及系统,包括:检测下一级从设备的上行数据緩存量大于预设拥塞阈值时,在下行物理帧中设置流量控制标记;将携带流量控制标记的下行物理帧向下级的各个从设备发送,以便下级的所述从设备检测到所述携带流量控制标记的下行物理帧时,进行自身数据上行发送的流量控制。所述方法、装置及系统能够合理为链路上的各个从设备分配通信带宽,提高通信链路的带宽利用率。

Description

一种上行流量控制方法、 装置、 级联设备及基站 本申请要求了 2011年 06月 10日提交的、 申请号为 201110156425.8、 发明名称为"一种上行流量控制方法、装置、级联设备及基站"的中国申请的 优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信领域, 尤其涉及一种上行流量控制方法、 装置、 级联 设备及基站。 背景技术
在无线通信设备中, 串行级联总线得到普遍应用。 一般的, 通过串行 化和解串行化(SerDes, Serialize and Deserialize )功能, 主设备和从设备之 间形成如图 1所示的串行级联总线结构。
在宽带码分多址( WCDMA, Wideband Code Division Multiple Access ) 系统中, 基站包括无线设备控制器( REC, Radio Equipment Controller )和 无线设备(RE, Radio Equipment ), 其中无线设备控制器对应主设备, 无线 设备对应从设备。 在 WCDMA系统中一种常用的流量控制方法为: 为各个 RE设置固定的基本通信带宽, 各个 RE根据该基本通信带宽进行自身数据 发送的流量控制。
现有的流量控制方法中, 由于为各个 RE设置固定的基本通信带宽, 则 对于所需发送的数据量较大的从设备来说, 该固定的基本通信带宽无法满 足从设备对于带宽的需求, 而对于所需发送的数据量较小的 RE来说, 虽然 数据发送效率得到了保证, 但是造成了通信带宽的严重浪费; 因此, 对于 系统通信链路的整体带宽而言, 现有流量控制方案导致通信链路的带宽浪 费严重, 链路利用率低下。 发明内容
本发明实施例提供一种上行流量控制方法、 装置、 级联设备及基站, 能够合理为链路上的各个从设备分配通信带宽, 提高通信链路的带宽利用 率。
为此
本发明一方面供一种上行流量控制方法, 包括:
检测到下一级从设备的上行数据緩存量大于预设拥塞阈值时, 在下行 物理帧中设置流量控制标记; 级级联设备下级的从设备检测到所述携带流量控制标记的下行物理帧时, 进行自身数据上行发送的流量控制。
另一方面提供一种上行流量控制方法, 包括:
接收上级级联设备发来的下行物理帧;
检测到所述下行物理帧中设置有流量控制标记, 且检测到正在进行数 据上行发送时, 根据预设的流量控制算法进行数据上行发送的流量控制。
另一方面还提供一种上行流量控制装置, 包括:
设置单元, 用于检测下一级从设备的上行数据緩存量大于预设拥塞阈 值时, 在下行物理帧中设置流量控制标记;
发送单元, 用于将携带流量控制标记的下行物理帧向下级的各个从设 备发送, 以便发送单元所属级联设备下级的从设备检测到所述携带流量控 制标记的下行物理帧时, 进行自身数据上行发送的流量控制。
另一方面还提供一种上行流量控制装置, 包括:
接收单元, 用于接收上级级联设备发来的下行物理帧;
控制单元, 用于检测到所述下行物理帧中设置有流量控制标记, 且检 测到正在进行数据上行发送时, 根据预设的流量控制算法进行数据上行发 送的流量控制。
另一方面还提供一种级联设备, 包括:
设置单元, 用于检测下一级从设备的上行数据緩存量大于预设拥塞阈 值时, 在下行物理帧中设置流量控制标记;
发送单元, 用于将携带流量控制标记的下行物理帧向下级的各个从设 备发送, 以便发送单元所属级联设备下级的从设备检测到所述携带流量控 制标记的下行物理帧时, 进行自身数据上行发送的流量控制。 另一方面还提供一种基站,包括:无线设备控制器 REC和无线设备 RE; 其中,
REC包括:
设置单元, 用于检测下一级从设备的上行数据緩存量大于预设拥塞阈 值时, 在下行物理帧中设置流量控制标记;
发送单元, 用于将携带流量控制标记的下行物理帧向下级的各个从设 备发送, 以便发送单元所属级联设备下级的从设备检测到所述携带流量控 制标记的下行物理帧时, 进行自身数据上行发送的流量控制;
RE包括:
设置单元, 用于检测下一级从设备的上行数据緩存量大于预设拥塞阈 值时, 在下行物理帧中设置流量控制标记;
发送单元, 用于将携带流量控制标记的下行物理帧向下级的各个从设 备发送, 以便发送单元所属级联设备下级的从设备检测到所述携带流量控 制标记的下行物理帧时, 进行自身数据上行发送的流量控制。 对于上述技术方案的技术效果分析如下:
本发明实施例中, 检测下一级从设备的上行数据緩存量大于预设拥塞 阈值时, 在下行物理帧中设置流量控制标记; 将携带流量控制标记的下行 物理帧向下级的各个从设备发送, 以便下级的从设备检测到所述携带流量 控制标记的下行物理帧时, 进行自身数据上行发送的流量控制; 从而能够 按照从设备当前的数据发送需求合理为链路上的各个从设备分配通信带 宽, 提高通信链路的利用率。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对 实施例或现有技术描述中所需要使用的附图作筒单地介绍。 图 1为现有技术串行级联总线结构示意图;
图 2为本发明实施例一种上行流量控制方法流程示意图;
图 3为本发明实施例另一种上行流量控制方法流程示意图;
图 4为本发明实施例又一种上行流量控制方法流程示意图; 图 5为本发明实施例一种上行流量控制装置结构示意图; 图 6为本发明实施例另一种上行流量控制装置结构示意图。
具体实施方式 如图 1 所示, 在串行级联总线通道中, 主要包括三个逻辑通道, 分别 为: 用户数据通道、 控制数据通道以及同步信息通道。 主设备和从设备共 享这三个逻辑通道。 其中, 主设备和从设备之间通过用户数据通道传输用 户面数据; 主设备通过控制数据通道设定控制数据相关的地址信息以控制 从设备, 而从设备通过该控制数据通道向主设备反馈控制数据, 所述控制 数据一般包括物理层控制信息以及高层控制信息; 同步信息通道用于主设 备与从设备之间进行同步信息的传输。 而以下的本发明实施例则通过控制 数据通道进行控制面的流量控制。 以下, 结合附图详细说明本发明实施例上行流量控制方法、 装置、 级 联设备及基站的实现。
图 2 为本发明实施例上行流量控制方法流程示意图, 该方法可以适用 于除最后一级从设备之外的各个从设备以及主设备中, 如图 1 所示, 该方 法包括:
步骤 201 : 检测下一级从设备的上行数据緩存量大于预设拥塞阈值时, 在下行物理帧中设置流量控制标记;
步骤 202 : 将携带流量控制标记的下行物理帧向下级的各个从设备发 送, 以便下级的从设备检测到所述携带流量控制标记的下行物理帧时, 进 行自身数据发送的上行流量控制。
图 1 所示的流量控制方法中, 主设备和各个从设备检测下级从设备的 上行流量是否拥塞, 在发生拥塞时, 发送携带有流量控制标记的下行物理 帧给下级的各个从设备, 由各个从设备进行自身数据发送的上行流量控制, 从而在保证通信链路带宽利用率的情况下, 对主设备和各个从设备实现了 控制面数据的快速流量控制。
与图 2对应的, 本发明实施例还提供另一种上行流量控制方法, 该方 法可以适用于各个从设备中; 如图 3所示, 包括:
步骤 301 : 接收上级级联设备发来的下行物理帧;
本发明实施例中的级联设备包括: 主设备和从设备。 步骤 302: 检测到所述下行物理帧中设置有流量控制标记, 且检测到正 在进行数据上行发送时, 根据预设的流量控制算法进行数据上行发送的流 量控制, 直至检测到下行物理帧中不携带所述流量控制标记。
其中, 所述预设的流量控制算法可以为: 停止发送、 降低发送速率到 预设值或者原速率的预设比率等, 如降低发送速率为原速率的 1/2 等, 可 以在实际应用中自主设定, 这里并不限制。
图 3所示的流量控制方法中, 当下级的从设备接收到上级的级联设备 下发的下行物理帧时, 检测其中是否设置有流量控制标记, 并在检测到流 量控制标记时, 进行流量控制, 从而协助上级的级联设备实现了流量控制。
在图 2和 3的基础上, 通过图 4对本发明实施例上行流量控制方法进 行更为详细的说明, 如图 4所示, 该方法包括:
步骤 401 :主设备和各级从设备分别检测下一级从设备的上行数据緩存 量是否大于预设的拥塞阈值, 如果是, 执行步骤 402; 否则, 执行步骤 403。
其中, 在各个从设备中可以包括两个緩沖器(Buffer ), Buffer A用于 緩存从设备自身所需发送的上行数据; Buffer B用于緩存下一级从设备的 上行数据。
因此, 本步骤中可以从 Buffer B中获取所述下一级从设备的上行数据 緩存量。
步骤 402: 在下行物理帧中设置流量控制标记, 将携带流量控制标记的 下行物理帧向该级联设备下级的各个从设备发送; 执行步骤 404。
其中, 具体的可以在下行物理帧的控制字中设置所述流量控制标记; 例如, 如下表 1 所示的下行物理帧中, 在原有的下行物理帧结构中增 加 p-1 子通道中的 "f low control" 字段, 作为所述流量控制标记, 标识 是否启动流量控制。 表 1
Figure imgf000008_0001
步骤 403: 在下行物理帧中取消流量控制标记, 将下行物理帧向该级联 设备下级的各个从设备发送; 执行步骤 404。
或者, 本步骤的实现也可以为: 在下行物理帧中设置流量控制取消标 记, 所述流量控制取消标记用于指示下级的各个从设备停止对于自身所需 发送的上行数据的流量控制;
相应的以下的步骤 404和步骤 405 中将检测下行物理帧中是否携带流 量控制取消标记, 并根据检测结果执行相应的处理, 这里不赘述。
与所述流量控制标记的设置相似的, 所述流量控制取消标记也可以通 过在下行物理帧中增加字段的方式实现, 这里不赘述。
步骤 404: 各个下级从设备接收下行物理帧,检测所述下行物理帧中是 否携带流量控制标记, 如果是, 执行步骤 405; 否则, 执行步骤 406。
步骤 405: 判断自身是否正在进行数据的上行发送, 如果是, 执行步骤 407; 否则, 执行步骤 408。
步骤 406: 判断自身是否正在进行数据的上行发送, 如果是, 执行步骤 408; 否则, 本分支处理流程结束。
步骤 407: 按照预设的流量控制算法进行数据上行发送的流量控制, 本 分支处理流程结束。
步骤 408: 正常进行数据上行发送, 本分支处理流程结束。
这里, 步骤 408 中分为两种情况, 一种是从设备之前检测到了下行物 理帧中携带流量控制标记, 从而从设备进行了数据上行发送的流量控制, 则本步骤的实现即为: 取消对数据上行发送的流量控制, 正常进行数据的 上行发送; 另一种是之前未检测到下行物理帧中携带流量控制标记, 因此 从设备未进行数据发送的流量控制, 则步骤 408 的实现为: 继续正常进行 数据的上行发送。
图 4 所示的流量控制方法中, 主设备和各个从设备分别检测下级从设 备的上行流量是否拥塞, 在发生拥塞时, 发送携带有流量控制标记的下行 物理帧给下级的各个从设备, 由各个从设备进行自身数据上行发送的流量 控制, 从而在保证通信链路带宽利用率的情况下, 对各个从设备实现了控 制面数据的快速流量控制。
在 WCDMA系统中,所述 REC对应所述主设备,所述 RE对应所述从设备, 而 REC和 RE之间的接口为通用公共无线接口 ( CPRI , Common Publ ic Radio Interface )接口; 所述下行物理帧可以为 CPRI接口的下行物理帧。 除所 述 WCDMA 系统外, 本申请实施例的上行流量控制方法还可以适用于全球移 动通讯系统( GSM )、 码分多址( CDMA )、 3GPP长期演进( LTE )等系统中, 这里不再赘述。 与上述的本发明实施例流量控制方法相对应的, 本发明实施例还提供 了流量控制装置及系统, 分别如图 5飞所示。
图 5 为本发明实施例一种流量控制装置结构示意图, 该装置可以设置 于主设备, 或从设备, 或主设备和从设备中; 其中, 最后一级从设备中可 以不设置该装置; 如图 5所示, 该装置可以包括:
设置单元 510,用于检测下一级从设备的上行数据緩存量大于预设拥塞 阈值时, 在下行物理帧中设置流量控制标记;
发送单元 520,用于将携带流量控制标记的下行物理帧向下级的各个从 设备发送, 以便发送单元所属级联设备下级的从设备检测到所述携带流量 控制标记的下行物理帧时, 进行自身数据发送的上行流量控制。
所述在下行物理帧中设置流量控制标记可以包括: 在下行物理帧的控 制字中设置流量控制标记。 所述下行物理帧可以为: CPRI帧。 优选地, 所述设置单元还可以用于: 检测到下一级从设备的上行数据 緩存量小于预设拥塞取消阈值时, 在向下级从设备发送的下行物理帧中取 消流量控制标 i己;
所述发送单元还可以用于: 将取消流量控制标记的下行物理帧发送给 下级的各个从设备, 以便下级的各个从设备检测到所述不携带流量控制标 记的下行物理帧时, 正常进行数据的上行发送。
或者, 所述设置单元还可以用于: 检测到下一级从设备的上行数据緩 存量小于预设拥塞取消阈值时, 在向下级从设备发送的下行物理帧中设置 流量控制取消标记;
所述发送单元还可以用于: 将携带流量控制取消标记的下行物理帧发 送给下级的各个从设备, 以便下级的各个从设备检测到携带流量控制取消 标记的下行物理帧时, 正常进行数据的上行发送。
如图 6所示, 提供了另一种上行流量控制装置, 该装置可以设置于各 个从设备中, 用于与图 5所示的装置配合, 该装置包括:
接收单元 610 , 用于接收上级级联设备发来的下行物理帧;
其中, 所述级联设备可以是从设备, 或者是主设备;
控制单元 620, 用于检测到所述下行物理帧中设置有流量控制标记, 且 检测到正在进行数据上行发送时, 根据预设的流量控制算法进行数据上行 发送的流量控制。
所述控制单元 620还可以用于: 检测到所述下行物理帧中未设置流量 控制标记, 且检测到正在进行数据上行发送时, 正常进行数据上行发送。 或者,
所述控制单元 620还可以用于: 检测到所述下行物理帧中设置有流量 控制取消标记, 且检测到正在进行数据上行发送时, 正常进行数据上行发 送。
所述预设的流量控制算法可以为: 停止发送、 降低发送速率到预设值 或者原速率的预设比率等, 如降低发送速率为原速率的 1/2等, 可以在实 际应用中自主设定, 这里并不限制。 本发明实施例还提供了一种上行流量控制的级联设备, 该级联设备可 以包括: 设置单元, 用于检测下一级从设备的上行数据緩存量大于预设拥塞阈 值时, 在下行物理帧中设置流量控制标记;
发送单元, 用于将携带流量控制标记的下行物理帧向下级的各个从设 备发送, 以便发送单元所属级联设备下级的从设备检测到所述携带流量控 制标记的下行物理帧时, 进行自身数据上行发送的流量控制。
上述级联设备可以为主设备或者从设备。
该级联设备还可以包括: 接收单元, 用于接收上级级联设备发来的下 行物理帧;
控制单元, 用于检测到所述下行物理帧中设置有流量控制标记, 且检 测到正在进行数据上行发送时, 根据预设的流量控制算法进行数据上行发 送的流量控制。
在实际应用中, 除了第一级和最后一级的从设备之外, 各个从设备都 既作为上级从设备的下级从设备, 也作为下级从设备的上级从设备, 而第 一级从设备则作为主设备的下级从设备, 主设备作为第一级从设备的上级 级联设备; 因此, 可以在每一主设备和从设备中设置图 5所示的装置, 另 外, 还可以在每一从设备中设置图 6所示的装置, 从而实现整个通信链路 上从设备的流量控制。
另外, 本发明实施例还提供一种基站, 包括: REC和 RE; 其中,
REC包括:
设置单元, 用于检测下一级从设备的上行数据緩存量大于预设拥塞阈 值时, 在下行物理帧中设置流量控制标记;
发送单元, 用于将携带流量控制标记的下行物理帧向下级的各个从设 备发送, 以便发送单元所属级联设备下级的从设备检测到所述携带流量控 制标记的下行物理帧时, 进行自身数据上行发送的流量控制;
RE包括:
设置单元, 用于检测下一级从设备的上行数据緩存量大于预设拥塞阈 值时, 在下行物理帧中设置流量控制标记;
发送单元, 用于将携带流量控制标记的下行物理帧向下级的各个从设 备发送, 以便发送单元所属级联设备下级的从设备检测到所述携带流量控 制标记的下行物理帧时, 进行自身数据上行发送的流量控制。 优选地, RE还可以包括: 接收单元, 用于接收上级级联设备发来的下 行物理帧;
控制单元, 用于检测到所述下行物理帧中设置有流量控制标记, 且检 测到正在进行数据上行发送时, 根据预设的流量控制算法进行数据上行发 送的流量控制。
上述的流量控制装置、 级联设备以及基站中, 主设备和各个从设备检 测下级从设备的上行流量是否拥塞, 在发生拥塞时, 发送携带有流量控制 标记的下行物理帧给下级的各个从设备, 由各个从设备进行自身数据发送 的上行流量控制, 从而在保证通信链路带宽利用率的情况下, 对各个从设 备实现了控制面数据的快速流量控制。 本领域普通技术人员可以理解, 实现上述实施例的方法的过程可以通 过程序指令相关的硬件来完成, 所述的程序可以存储于可读取存储介质中, 该程序在执行时执行上述方法中的对应步骤。 所述的存储介质可以如:
ROM/RAM, 磁碟、 光盘等。
以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领域的 普通技术人员来说, 在不脱离本发明原理的前提下, 还可以做出若干改进 和润饰, 这些改进和润饰也应视为本发明的保护范围。。

Claims

权利要求
1、 一种上行流量控制方法, 其特征在于, 包括:
当检测到下一级从设备的上行数据緩存量大于预设拥塞阈值时, 在下 行物理帧中设置流量控制标记; 级级联设备下级的从设备检测到所述携带流量控制标记的下行物理帧时, 进行自身数据上行发送的流量控制。
2、 根据权利要求 1所述的方法, 其特征在于, 还包括:
当检测到下一级从设备的上行数据緩存量小于预设拥塞取消阈值时, 在向下级从设备发送的下行物理帧中取消流量控制标记, 以便下级的各个 从设备检测到不携带流量控制标记的下行物理帧时, 正常进行数据的上行 发送; 或者,
检测到下一级从设备的上行数据緩存量小于预设拥塞取消阈值时, 在 向下级从设备发送的下行物理帧中设置流量控制取消标记, 以便下级的各 个从设备检测到所述流量控制取消标记时, 正常进行数据的上行发送。
3、 根据权利要求 1或 2所述的方法, 其特征在于, 所述在下行物理帧 中设置流量控制标记包括:
在下行物理帧的控制字中设置流量控制标记。
4、 根据权利要求 3所述的方法, 其特征在于, 所述下行物理帧为通用 公共无线接口 CPRI帧。
5、 一种上行流量控制方法, 其特征在于, 包括:
接收上级级联设备发来的下行物理帧;
当检测到所述下行物理帧中设置有流量控制标记, 且检测到正在进行 数据上行发送时, 根据预设的流量控制算法进行数据上行发送的流量控制。
6、 根据权利要求 5所述的方法, 其特征在于, 还包括:
当检测到所述下行物理帧中未携带流量控制标记, 且检测到正在进行 数据上行发送时, 正常进行数据上行发送; 或者,
检测到所述下行物理帧中设置有流量控制取消标记, 且检测到正在进 行数据上行发送时, 正常进行数据上行发送。
7、 根据权利要求 5或 6所述的方法, 其特征在于, 所述下行物理帧中 设置有流量控制标记包括:
在下行物理帧的控制字中设置有所述流量控制标记。
8、 根据权利要求 5或 6所述的方法, 其特征在于, 所述流量控制算法 包括: 停止发送、 或者降低发送速率到原速率的预设比率。
9、 一种上行流量控制装置, 其特征在于, 包括:
设置单元, 用于检测下一级从设备的上行数据緩存量大于预设拥塞阈 值时, 在下行物理帧中设置流量控制标记;
发送单元, 用于将携带流量控制标记的下行物理帧向下级的各个从设 备发送, 以便发送单元所属级联设备下级的从设备检测到所述携带流量控 制标记的下行物理帧时, 进行自身数据上行发送的流量控制。
1 0、 根据权利要求 9所述的装置, 其特征在于, 所述设置单元还用于: 检测到下一级从设备的上行数据緩存量小于预设拥塞取消阈值时, 在向下 级从设备发送的下行物理帧中取消流量控制标记;
所述发送单元还用于: 将未携带流量控制标记的下行物理帧发送给下 级的各个从设备, 以便下级的各个从设备检测到所述不携带流量控制标记 的下行物理帧时, 正常进行数据的上行发送。
1 1、 根据权利要求 9所述的装置, 其特征在于, 所述设置单元还用于: 检测到下一级从设备的上行数据緩存量小于预设拥塞取消阈值时, 在向下 级从设备发送的下行物理帧中设置流量控制取消标记;
所述发送单元还用于: 将携带流量控制取消标记的下行物理帧发送给 下级的各个从设备, 以便下级的各个从设备检测到携带流量控制取消标记 的下行物理帧时, 正常进行数据的上行发送。
12、 一种上行流量控制装置, 其特征在于, 包括:
接收单元, 用于接收上级级联设备发来的下行物理帧;
控制单元, 用于检测到所述下行物理帧中设置有流量控制标记, 且检 测到正在进行数据上行发送时, 根据预设的流量控制算法进行数据上行发 送的流量控制。
1 3、根据权利要求 12所述的装置, 其特征在于, 所述控制单元还用于: 检测到所述下行物理帧中未携带流量控制标记, 且检测到正在进行数据上 行发送时, 正常进行数据上行发送; 或者, 所述控制单元还用于: 检测到所述下行物理帧中设置有流量控制取消 标记, 且检测到正在进行数据上行发送时, 正常进行数据上行发送。
14、 一种级联设备, 其特征在于, 包括:
设置单元, 用于检测下一级从设备的上行数据緩存量大于预设拥塞阈 值时, 在下行物理帧中设置流量控制标记;
发送单元, 用于将携带流量控制标记的下行物理帧向下级的各个从设 备发送, 以便发送单元所属级联设备下级的从设备检测到所述携带流量控 制标记的下行物理帧时, 进行自身数据上行发送的流量控制。
1 5、 根据权利要求 14所述的级联设备, 其特征在于, 还包括: 接收单元, 用于接收上级级联设备发来的下行物理帧;
控制单元, 用于检测到所述下行物理帧中设置有流量控制标记, 且检 测到正在进行数据上行发送时, 根据预设的流量控制算法进行数据上行发 送的流量控制。
1 6、 根据权利要求 14或 15所述的级联设备, 其特征在于, 所述级联 设备为无线设备控制器 REC或者无线设备 RE。
1 7、 一种基站, 其特征在于, 包括: 无线设备控制器 REC和无线设备 RE; 其中,
REC包括:
设置单元, 用于检测下一级从设备的上行数据緩存量大于预设拥塞阈 值时, 在下行物理帧中设置流量控制标记;
发送单元, 用于将携带流量控制标记的下行物理帧向下级的各个从设 备发送, 以便发送单元所属级联设备下级的从设备检测到所述携带流量控 制标记的下行物理帧时, 进行自身数据上行发送的流量控制;
RE包括:
设置单元, 用于检测下一级从设备的上行数据緩存量大于预设拥塞阈 值时, 在下行物理帧中设置流量控制标记;
发送单元, 用于将携带流量控制标记的下行物理帧向下级的各个从设 备发送, 以便发送单元所属级联设备下级的从设备检测到所述携带流量控 制标记的下行物理帧时, 进行自身数据上行发送的流量控制。
1 8、 根据权利要求 17所述的基站, 其特征在于, 所述 RE还包括: 接收单元, 用于接收上级级联设备发来的下行物理帧; 控制单元, 用于检测到所述下行物理帧中设置有流量控制标记, 且检 测到正在进行数据上行发送时, 根据预设的流量控制算法进行数据上行发 送的流量控制。
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