WO2014023225A1 - 调度策略的调整方法及装置、基站 - Google Patents
调度策略的调整方法及装置、基站 Download PDFInfo
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- WO2014023225A1 WO2014023225A1 PCT/CN2013/080933 CN2013080933W WO2014023225A1 WO 2014023225 A1 WO2014023225 A1 WO 2014023225A1 CN 2013080933 W CN2013080933 W CN 2013080933W WO 2014023225 A1 WO2014023225 A1 WO 2014023225A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
Definitions
- the present invention relates to the field of communications, and in particular to a method and apparatus for adjusting a scheduling policy, and a base station.
- HSDPA High Speed Downlink Packet Access
- HSPA+ High Speed Packet Access, HSPA for short
- CQI Channel Quality Indicator
- QPSK Quadrature Phase Shift Keying
- QAM Quadrature Amplitude Modulation
- the base station has made some adjustments.
- the embodiment of the present invention provides a method and a device for adjusting a scheduling policy, and a base station, to solve at least the foregoing problem.
- a method for adjusting a scheduling policy including: acquiring a degree of change of a channel; adjusting a scheduling policy of the base station according to the obtained degree of change, wherein the scheduling policy is used to indicate downlink data.
- the degree to which the transmission rate matches the downlink channel.
- Obtaining the degree of change of the channel includes: estimating the degree of change of the channel by using the uplink demodulation information.
- the uplink demodulation message includes one of the following: a CQI reported by a user equipment (User Equipment, abbreviated as UE), a spectrum spread of an uplink received signal, an uplink channel estimation value, and an energy of an uplink received pilot signal.
- UE User Equipment
- Estimating the degree of change of the channel by using the uplink demodulation information includes: obtaining a variance of the uplink demodulation information or an absolute value of the difference of the adjacent values; and estimating a degree of change of the channel according to the variance or the absolute value of the difference.
- Adjusting the scheduling policy of the base station according to the degree of change of the acquisition including: adjusting the CQI used by the scheduling according to the degree of change of the acquisition, using a corresponding Block Error Ratio (BLER) or an outer loop control threshold; and/or Adjust the transmit power of the downlink data according to the degree of change obtained.
- BLER Block Error Ratio
- an apparatus for adjusting a scheduling policy including: an acquiring module, configured to acquire a degree of change of a channel; and an adjusting module, configured to adjust a scheduling policy of the base station according to the degree of change obtained,
- the scheduling policy is used to indicate the matching degree between the sending rate of the downlink data and the downlink channel.
- the obtaining module is configured to estimate a degree of change of the channel by using uplink demodulation information.
- the acquiring module is configured to estimate a degree of change of the channel by using one of the following uplink demodulation messages: a channel quality indicator CQI reported by the user equipment (UE), a spectrum extension of the uplink received signal, an uplink channel estimation value, and an uplink received pilot signal. energy of.
- the obtaining module includes: an acquiring unit, configured to acquire a variance of the uplink demodulation information or an absolute value of the difference value of the adjacent values; and an estimating unit, configured to estimate a degree of change of the channel according to the variance or the absolute value of the difference.
- the foregoing adjusting module is configured to adjust a CQI used by the scheduling according to the degree of change obtained by using a corresponding target (BLER) or an outer loop control threshold; and/or adjusting a transmit power of the downlink data according to the degree of change of the acquired.
- a base station comprising: the apparatus described above.
- the technical means for adjusting the scheduling policy of the base station according to the degree of change of the channel is used to solve the technical problem that the unified adjustment strategy cannot take into account the channel change in the related art, thereby improving the downlink throughput.
- FIG. 1 is a flowchart of a method for adjusting a scheduling policy according to Embodiment 1 of the present invention
- FIG. 2 is a structural block diagram of an apparatus for adjusting a scheduling policy according to Embodiment 1 of the present invention
- 3 is a block diagram showing another structure of an apparatus for adjusting a scheduling policy according to Embodiment 1 of the present invention
- FIG. 1 is a flowchart of a method for adjusting a scheduling policy according to Embodiment 1 of the present invention
- FIG. 2 is a structural block diagram of an apparatus for adjusting a scheduling policy according to Embodiment 1 of the present invention
- 3 is a block diagram showing another structure of an apparatus for adjusting a scheduling policy according to Embodiment 1 of the present invention
- FIG. 1 is a flowchart of a method for adjusting a scheduling policy according to Embodiment 1 of the present invention
- FIG. 2 is a structural block diagram of an apparatus for adjusting a scheduling policy according to Embodiment 1 of
- FIG. 4 is a structural block diagram of a base station according to Embodiment 1 of the present invention
- FIG. 5 is a flowchart for adjusting a scheduling policy according to Embodiment 2 of the present invention
- FIG. 6 is a schematic structural diagram of a scheduling policy adjusting apparatus according to Embodiment 2 of the present invention
- FIG. 7 is a flowchart of a scheduling policy adjusting method according to Embodiment 3 of the present invention
- FIG. 8 is a scheduling policy according to Embodiment 4 of the present invention; Adjustment method flow chart.
- FIG. 1 is a flowchart of a method for adjusting a scheduling policy according to Embodiment 1 of the present invention. As shown in FIG.
- the method includes: Step S102: Obtain a degree of change of a channel; Step S104, adjust a scheduling policy of the base station according to the degree of change of the acquired, where the scheduling policy is used to indicate a sending rate of the downlink data and a downlink channel.
- the degree of matching With the above processing steps, the scheduling policy of the base station can be adjusted according to the degree of change of the channel, so that the downlink data transmission rate can be better matched with the downlink channel, and the downlink throughput can be provided.
- the degree of channel change There are various ways to obtain the degree of channel change. For example, it can be obtained by receiving the degree of channel change sent by a third-party device, or locally. For the latter, the degree of change of the channel can be estimated by using uplink demodulation information.
- the uplink demodulation message includes, but is not limited to, one of the following: a CQI reported by the UE, a spectrum extension of the uplink received signal, an uplink channel estimation value, and an energy of the uplink received pilot signal.
- a CQI reported by the UE a CQI reported by the UE
- a spectrum extension of the uplink received signal a spectrum extension of the uplink received signal
- an uplink channel estimation value an energy of the uplink received pilot signal.
- the absolute value of the difference of the variance or the adjacent value may be used, specifically, the variance of the uplink demodulation information or the absolute value of the difference of the adjacent values is obtained;
- the obtained variance or difference absolute value estimates the degree of change of the channel.
- the foregoing step S104 is to adjust the scheduling policy of the base station according to the degree of change of the acquired, and may include the following processing process: adjusting the CQI used by the scheduling according to the degree of change of the obtained target BLER or the outer ring control threshold; and/or, according to the obtaining The degree of change adjusts the transmit power of the downlink data.
- the adjusted scheduling policy needs to be performed to obtain the selected block size, the number of code channels, the modulation mode, and the transmit power of the downlink data. In this way, the downlink data transmission rate of the downlink data is matched with the downlink channel, thereby improving the downlink throughput.
- FIG. 2 is a structural block diagram of an apparatus for adjusting a scheduling policy according to Embodiment 1 of the present invention. As shown in FIG.
- the device includes: an obtaining module 20, connected to the adjusting module 22, configured to acquire a degree of change of the channel; and an adjusting module 22, configured to adjust a scheduling policy of the base station according to the acquired degree of change, where the scheduling The policy is used to indicate the matching rate of the downlink data transmission rate with the downlink channel.
- the function implemented by the foregoing processing module can also adjust the scheduling policy of the base station according to the degree of change of the channel. Therefore, the downlink data transmission rate can be better matched with the downlink channel to provide downlink throughput.
- the acquiring module 20 is further configured to estimate the degree of change of the channel by using uplink demodulation information.
- the acquiring module 20 estimates the degree of change of the channel by using one of the following uplink demodulation messages: CQI reported by the UE, spectrum extension of the uplink received signal, estimated value of the uplink channel, and energy of the uplink received pilot signal. .
- the acquiring module 20 includes: an obtaining unit 200, connected to the estimating unit 202, configured to acquire the variance of the uplink demodulation information or the absolute value of the adjacent value.
- the estimation unit 202 is configured to estimate the degree of change of the channel according to the variance or the absolute value of the difference.
- the adjusting module 22 is configured to adjust the CQI used by the scheduling according to the degree of change of the corresponding target BLER or the outer ring control threshold; and/or adjust the transmit power of the downlink data according to the degree of change of the acquired.
- a base station is further provided. As shown in FIG. 4, the method includes: an apparatus for adjusting a scheduling policy in the foregoing embodiment. In this way, the base station can adjust the scheduling policy of the base station according to the degree of change of the channel according to the function of each module in the foregoing apparatus.
- Embodiment 2 This embodiment relates to a scheme for improving downlink throughput of HSDPA and High Speed Packet Access Evolution (HSPA+) systems.
- HSPA+ High Speed Packet Access Evolution
- the scheduling policy adjustment method in this embodiment includes: Step S502: The base station estimates the degree of change of the channel by using the uplink demodulation information, where the uplink demodulation information may be the CQI reported by the UE, or may be the spectrum of the uplink received signal.
- the extension may also be an uplink channel estimation value, or may be an energy of an uplink received pilot signal, and estimate a degree of channel variation by calculating a variance of a historical value or a modulus (absolute value) of a difference of adjacent values.
- Step S504 The base station adjusts the corresponding scheduling policy according to the degree of channel change, and the degree of channel change is different, and the corresponding scheduling policy is different. For example, according to the degree of channel change, different target BLERs or different outer ring control thresholds may be used to adjust scheduling usage.
- the CQI can also adjust the downlink transmit power according to the degree of channel change to improve the decoding performance, etc.;
- Step S506 execute a scheduling policy, and obtain a downlink selected block size, a number of code channels, a modulation mode, and a transmit power;
- a scheduling policy adjusting device is used to implement the above method. As shown in FIG. 6, the device includes the following modules:
- the channel change estimation module 60 is connected to the adjustment module 62, configured to estimate the degree of change of the current channel, calculate the variance of the historical uplink demodulation information, or the difference between adjacent values.
- the modulus value (absolute value), and thereby estimating the degree of channel change, the uplink demodulation information may be the CQI reported by the UE, the spectrum extension of the uplink received signal, the uplink channel estimation value, or The energy of the uplink received signal;
- the adjustment module 62 is connected to the scheduling module 64, and adjusts the corresponding scheduling policy according to the degree of channel change.
- the degree of channel change is different, and the corresponding scheduling policy is different. For example, different target BLERs or different outer rings may be adopted according to the degree of channel change.
- the CQI used in the control threshold adjustment scheduling may also adjust the downlink transmission power according to the degree of channel change to improve decoding performance, etc.
- the scheduling module 64 performs data scheduling according to the corresponding scheduling policy to obtain a high-speed downlink shared channel (High
- Step S702 The base station decodes and obtains the CQI reported by the UE, and calculates the variance of the historical CQI, and sets L to indicate the number of recorded historical CQIs. :
- ⁇ represents a C Q value, indicating a variance
- Step S704 adjusting an outer loop control parameter according to the variance, and performing outer loop control according to the ACK/NACK fed back by the UE, and the parameter may be an outer loop control threshold or a target BLER, etc. . a.
- the outer loop control threshold assuming the default threshold of the outer loop control is [ ⁇ , ⁇ ], according to the variance adjustment as follows, lM "' is the actual outer loop control threshold -
- [ ⁇ ', ⁇ '] [/( ⁇ ) * . ⁇ ) * .3 ⁇ 4
- the f function and the g function can be the same or different. For example, you can take the following function:
- the function is equivalent to a switch, greater than or equal to A to close the threshold, directly use the CQI reported by the UE for scheduling, less than A, the default outer ring is used.
- Control threshold The continuous outer loop control threshold can be adjusted continuously, and the corresponding outer loop control threshold is adjusted by using the corresponding f function and g function; b. Target BLER, using different target BLER according to variance, ⁇ ' is the default target BLER,
- Step S706 Perform downlink data scheduling, perform downlink data scheduling according to the previously adjusted policy, determine downlink transmission blocks, code channel numbers, modulation modes, and transmission powers, and perform data transmission.
- the scheduling policy adjustment method provided in this embodiment includes: Step S802: Obtain a channel estimation value of an uplink pilot, and calculate a modulus value (absolute value) of a difference between two adjacent channel estimation values. ), L is the number of recorded channel estimates.
- Step S804 according to the adjustment CQI, for a channel with relatively large fluctuation, the CQI is adjusted faster, which is advantageous for faster adaptation to the channel, thereby improving throughput.
- Step S806 performing downlink data scheduling according to the adjusted CQI, to obtain a downlink selected block size, a code channel number, a modulation mode, and a transmission power.
- the modulus value (absolute value) of the adjacent difference may be used to determine the degree of channel change, and different adjustment strategies may be adopted according to the fluctuation of the channel, except that the threshold of the outer loop control is adjusted, In addition to the step size and the target BLER, the CQI and the selected block size (TBsize), downlink transmit power, etc.
- the base station estimates the degree of channel change by using the uplink demodulation information, and adjusts the corresponding scheduling policy according to the degree of channel change, so that the transmitted rate is better matched to the wireless channel, thereby improving downlink throughput.
- a software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.
- a storage medium is provided, the software being stored, including but not limited to: an optical disk, a floppy disk, a hard disk, a rewritable memory, and the like.
- the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
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Abstract
本发明提供了一种调度策略的调整方法及装置、基站。其中,上述方法包括:获取信道的变化程度;根据获取的上述变化程度对基站的调度策略进行调整,其中,调度策略用于指示下行数据的发送速率与下行信道的匹配程度。采用本发明提供的上述技术方案,解决了相关技术中,采用统一的调整策略不能兼顾信道变化等技术问题,从而提高了下行吞吐量。
Description
调度策略的调整方法及装置、 基站 技术领域 本发明涉及通信领域, 具体而言, 涉及一种调度策略的调整方法及装置、 基站。 背景技术 高速下行分组接入技术(High Speed Downlink Packet Access, 简称为 HSDPA) 以 及后续演进高速分组接入 (HSPA+, High Speed Packet Access,简称为 HSPA)中一个关 键技术是链路自适应技术, 用户根据终端上报的信道质量指示 (Channel Quality Indicator, 简称为 CQI) 来确定使用正交相移键控 (Quadrature Phase Shift Keying, 简 称为 QPSK)、 四进制正交振幅调制 (Quadrature Amplitude Modulation, 简称为 QAM) ( 16QAM)或八进制 QAM (64QAM)调制, 为了降低 CQI测量误差以及***环回时 延对性能的影响, 基站做了一定的调整, 由于信道存在波动, 如果统一采取相同的调 整策略, 很可能使得调整跟不上信道的变化, 从而导致吞吐量的下降。 针对相关技术中的上述问题, 目前尚未提出有效的解决方案。 发明内容 针对相关技术中, 采用统一的调整策略不能兼顾信道变化等技术问题, 本发明实 施例提供了一种调度策略的调整方法及装置、 基站, 以至少解决上述问题。 根据本发明的一个实施例, 提供了一种调度策略的调整方法, 包括: 获取信道的 变化程度; 根据获取的上述变化程度对基站的调度策略进行调整, 其中, 调度策略用 于指示下行数据的发送速率与下行信道的匹配程度。 获取信道的变化程度, 包括: 通过上行解调信息估计信道的变化程度。 上述上行解调消息包括以下之一: 用户设备 (User Equipment, 简称为 UE) 上报 的 CQI、 上行接收信号的频谱扩展、 上行信道估计值、 上行接收的导频信号的能量。 通过上行解调信息估计信道的变化程度, 包括: 获取上行解调信息的方差或者相 邻值的差值绝对值; 根据方差或差值绝对值估计信道的变化程度。
根据获取的变化程度对基站的调度策略进行调整, 包括: 根据获取的变化程度采 用相应的目标误块率 (Block Error Ratio, 简称为 BLER) 或者外环控制门限调整调度 使用的 CQI; 和 /或, 根据获取的变化程度调整下行数据的发射功率。 根据获取的变化程度对基站的调度策略进行调整之后, 包括: 执行调整后的调度 策略, 获取下行数据的选块大小、 码道数、 调制方式以及发射功率。 根据本发明的另一个实施例, 提供了一种调度策略的调整装置, 包括: 获取模块, 设置为获取信道的变化程度; 调整模块, 设置为根据获取的变化程度对基站的调度策 略进行调整, 其中, 调度策略用于指示下行数据的发送速率与下行信道的匹配程度。 上述获取模块, 设置为通过上行解调信息估计信道的变化程度。 上述获取模块, 设置为通过以下之一上行解调消息估计信道的变化程度: 用户设 备 (UE) 上报的信道质量指示 CQI、 上行接收信号的频谱扩展、 上行信道估计值、 上 行接收的导频信号的能量。 上述获取模块包括: 获取单元, 设置为获取上行解调信息的方差或者相邻值的差 值绝对值; 估计单元, 设置为根据方差或差值绝对值估计信道的变化程度。 上述调整模块, 设置为根据获取的变化程度采用相应的目标 (BLER)或者外环控制 门限调整调度使用的 CQI; 和 /或根据获取的变化程度调整下行数据的发射功率。 根据本发明的再一个实施例, 提供了一种基站, 包括: 以上所述的装置。 通过本发明, 采用根据信道的变化程度对基站的调度策略进行调整的技术手段, 解决了相关技术中, 采用统一的调整策略不能兼顾信道变化等技术问题, 从而提高了 下行吞吐量。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 本发 明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图 中- 图 1为根据本发明实施例 1的调度策略的调整方法的流程图; 图 2为根据本发明实施例 1的调度策略的调整装置的结构框图;
图 3为根据本发明实施例 1的调度策略的调整装置的另一结构框图; 图 4为根据本发明实施例 1的基站的结构框图; 图 5为根据本发明实施例 2的调度策略调整方法流程示意图; 图 6为根据本发明实施例 2的调度策略调整装置的结构示意图; 图 7为根据本发明实施例 3的调度策略调整方法流程图; 图 8为根据本发明实施例 4的调度策略调整方法流程图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在不冲突的 情况下, 本申请中的实施例及实施例中的特征可以相互组合。 考虑到相关技术中, 在信道存在波动的情况下, 由于统一采取相同的调整策略, 使得调整跟不上信道的变化, 导致吞吐量下降等技术问题, 以下实施例提供了根据信 道变化程度调整基站的调度策略的技术方案。 具体如下: 实施例 1 图 1为根据本发明实施例 1的调度策略的调整方法的流程图。 如图 1所示, 该方 法包括: 步骤 S102, 获取信道的变化程度; 步骤 S104, 根据获取的变化程度对基站的调度策略进行调整, 其中, 调度策略用 于指示下行数据的发送速率与下行信道的匹配程度。 采用上述处理步骤, 由于可以根据信道的变化程度对基站的调度策略进行调整, 因此, 可以使得下行数据的发送速率与下行信道更加较好地匹配, 提供下行吞吐量。 获取信道变化程度的方式有多种, 例如可以通过接收第三方设备发送过来的信道 变化程度实现, 或者从本地获取, 对于后者, 可以通过上行解调信息估计信道的变化 程度。 上述上行解调消息包括但不限于以下之一: UE上报的 CQI、上行接收信号的频谱 扩展、 上行信道估计值、 上行接收的导频信号的能量。
在通过上述上行解调信息估计信道的变化程度时, 可以通过方差或相邻值的差值 绝对值来实现, 具体地, 获取上行解调信息的方差或者相邻值的差值绝对值; 根据获 取的方差或差值绝对值估计信道的变化程度。 上述步骤 S104即根据获取的变化程度对基站的调度策略进行调整,可以包括以下 处理过程: 根据获取的变化程度采用相应的目标 BLER或者外环控制门限调整调度使 用的 CQI; 和 /或, 根据获取的变化程度调整下行数据的发射功率。 在执行完步骤 S104的处理过程之后,需要执行调整后的调度策略,获取下行数据 的选块大小、 码道数、 调制方式以及发射功率。 这样, 便实现了使下行数据的下行数 据的发送速率与下行信道进行匹配, 进而提高下行吞吐量。 在本实施例中还提供了一种调度策略的调整装置, 用于实现上述实施例及优选实 施方式, 已经进行过说明的不再赘述, 下面对该装置中涉及到的模块进行说明。 如以 下所使用的, 术语"模块"可以实现预定功能的软件和 /或硬件的组合。 尽管以下实施例 所描述的装置较佳地以软件来实现, 但是硬件, 或者软件和硬件的组合的实现也是可 能并被构想的。 图 2为根据本发明实施例 1的调度策略的调整装置的结构框图。 如图 2所示, 该装置包括: 获取模块 20, 连接至调整模块 22, 设置为获取信道的变化程度; 调整模块 22, 设置为根据获取的变化程度对基站的调度策略进行调整, 其中, 调 度策略用于指示下行数据的发送速率与下行信道的匹配程度。 通过上述处理模块实现的功能, 同样可以根据信道的变化程度对基站的调度策略 进行调整, 因此, 可以使得下行数据的发送速率与下行信道更加较好地匹配, 提供下 行吞吐量。 和上述方法实施例对应, 上述获取模块 20, 还设置为通过上行解调信息估计信道 的变化程度。 在此种情况下, 该获取模块 20, 通过以下之一上行解调消息估计信道的 变化程度: UE上报的 CQI、 上行接收信号的频谱扩展、 上行信道估计值、 上行接收的 导频信号的能量。 在本实施例的一个优选实施过程中, 如图 3所示, 上述获取模块 20包括: 获取单 元 200,连接至估计单元 202, 设置为获取上行解调信息的方差或者相邻值的差值绝对 值; 估计单元 202, 设置为根据方差或差值绝对值估计信道的变化程度。
在本实施例中, 上述调整模块 22, 设置为根据获取的变化程度采用相应的目标 BLER或者外环控制门限调整调度使用的 CQI;和 /或,根据获取的变化程度调整下行数 据的发射功率。 在本实施例中, 还提供了一种基站, 如图 4所示, 包括: 以上实施例中的调度策 略的调整装置。 这样, 使得基站可以根据上述装置中各个模块的功能根据信道的变化 程度对基站的调度策略进行调整。 实施例 2 本实施例涉及 HSDPA 以及高速分组接入演进 (HSPA+) ***提高下行吞吐量的 方案。 本实施例的目的在于根据信道变化程度调整对应的调度策略, 从而提高下行吞 吐量。 本实施例的核心思想在于, 通过上行历史的解调信息, 估计当前信道的变化程 度, 并根据信道变化程度调整对应的调度策略, 从而改善 HSDPA终端吞吐率。 如图 5所示, 本实施例的调度策略调整方法包括: 步骤 S502, 基站通过上行解调信息估计信道的变化程度, 上行解调信息可以是 UE上报的 CQI, 也可以是上行接收信号的频谱扩展, 还可以是上行信道估计值, 也可 以是上行接收的导频信号的能量,通过计算历史值的方差或者相邻值的差的模值 (绝对 值)来估计信道变化的程度。 步骤 S504, 基站根据信道变化程度, 调整对应的调度策略, 信道变化程度不同, 对应的调度策略不同, 比如根据信道变化的程度大小可以采用不同的目标 BLER或者 不同的外环控制门限等调整调度使用的 CQI, 也可以根据信道变化的程度调整下行的 发射功率来提高解码性能等; 步骤 S506, 执行调度策略, 得到下行的选块大小、 码道数、 调制方式以及发射功 率; 本实施例还提供一种调度策略调整装置, 用于实现上述方法。 如图 6所示, 该装 置包含以下模块: 信道变化估计模块 60, 连接至调整模块 62, 设置为估计出当前信道的变化程度, 计算历史的上行解调信息的方差或者是相邻值的差的模值 (绝对值), 并由此来估计信 道变化的程度, 上行解调信息可以是 UE上报的 CQI, 也可以是上行接收信号的频谱 扩展, 还可以是上行信道估计值, 也可以是上行接收信号的能量;
调整模块 62, 连接至调度模块 64, 根据信道变化的程度调整对应的调度策略, 信 道变化程度不同, 对应的调度策略不同, 比如根据信道变化的程度大小可以采用不同 的目标 BLER或不同的外环控制门限调整调度使用的 CQI, 也可以根据信道变化的程 度调整下行的发射功率来提高解码性能等; 调度模块 64, 根据对应的调度策略进行数据调度, 得到高速下行共享信道 (High
Speed Downlink Shared Channel, 简称为 HS-DSCH) 的选块大小、 码道数、 调制方式 以及发射功率。 实施例 3 本实施例根据 UE上报的 CQI来估计信道的变化程度, 并根据信道的变化程度采 用不同的外环控制参数。 如图 7所示, 本实施例提供的调度策略调整方法包括以下步 骤: 步骤 S702, 基站解码得到 UE上报的 CQI, 并计算历史的 CQI的方差, 设 L表示 记录的历史 CQI的数量, 计算如下:
F
, 其中, μ表示 CQ 值, 表示方差; 步骤 S704, 根据方差, 调整外环控制的参数, 并根据 UE反馈的 ACK/NACK进 行外环控制, 参数可以是外环控制的门限或者目标 BLER等。 a. 外环控制的门限,假设外环控制的默认门限是 [Μ,Ν],根据方差调整如下, lM"' 是实际使用的外环控制门限-
{ 0, else 这里 A是门限, 比如 A=l, 或者 1.2等, 此时函数相当于一个开关, 大于等于 A 则关闭门限,直接使用 UE上报的 CQI进行调度,小于 A则使用默认的外环控制门限。 可以采用连续平滑的调整外环控制门限, 使用相应的 f函数和 g函数调整上一次的外 环控制门限;
b. 目标 BLER,根据方差使用不同的目标 BLER, ^^^' 是默认的目标 BLER,
BLER'
是调度实际使用的目标 BLER, 如下:
中, .2., else 这里 A和 B都是门限, 在方差比较小的时候, 表明信道比较稳定, 可以采用比较 低的目标 BLER, 当方差比较大的时候, 表明信道变化比较大, 需要采用比较高的目 标 BLER。 步骤 S706, 进行下行数据调度, 根据前面调整的策略, 进行下行数据调度, 确定 下行的传输块、 码道数、 调制方式和发射功率, 进行数据传输。 实施例 4 如图 8所示, 本实施例提供的调度策略调整方法, 包括: 步骤 S802, 获得上行导频的信道估计值, 计算相邻两次的信道估计值的差的模 值 (绝对值) ,L是记录的信道估计值 的个数。
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i=2 步骤 S804, 根据 调整 CQI, 对于波动比较大的信道, CQI调整的快一些, 有利 于更快的适应信道, 从而提高吞吐量。 步骤 S806, 根据调整后的 CQI, 进行下行数据调度, 得到下行的选块大小、 码道 数、 调制方式以及发射功率。 本实施例中, 除了使用方差外, 还可以使用相邻差的模值 (绝对值)来判断信道变 化的程度,根据信道的波动情况可以采用不同的调整策略, 除了调整外环控制的门限、 步长以及目标 BLER以外, 还可以调整 CQI以及调度选择的选块大小 (TBsize), 下 行发射功率等, 通过这些方法来提高性能。
本实施例中, 基站通过上行解调信息估计出信道变化程度, 并根据信道变化程度 调整对应的调度策略, 使得发送的速率更好的匹配无线信道, 从而提高了下行的吞吐
在另外一个实施例中, 还提供了一种软件, 该软件用于执行上述实施例及优选实 施方式中描述的技术方案。 在另外一个实施例中, 还提供了一种存储介质, 该存储介质中存储有上述软件, 该存储介质包括但不限于: 光盘、 软盘、 硬盘、 可擦写存储器等。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多个计算装置所 组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码来实现, 从而, 可以 将它们存储在存储装置中由计算装置来执行, 并且在某些情况下, 可以以不同于此处 的顺序执行所示出或描述的步骤, 或者将它们分别制作成各个集成电路模块, 或者将 它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样, 本发明不限制于任 何特定的硬件和软件结合。 以上仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技术人 员来说, 本发明可以有各种更改和变化。 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
1. 一种调度策略的调整方法, 包括:
获取信道的变化程度;
根据获取的所述变化程度对基站的调度策略进行调整, 其中, 所述调度策 略用于指示下行数据的发送速率与下行信道的匹配程度。
2. 根据权利要求 1所述的方法, 其中, 获取信道的变化程度, 包括:
通过上行解调信息估计信道的变化程度。
3. 根据权利要求 2所述的方法, 其中, 所述上行解调消息包括以下之一:
用户设备 UE上报的信道质量指示 CQI、 上行接收信号的频谱扩展、 上行 信道估计值、 上行接收的导频信号的能量。
4. 根据权利要求 2所述的方法, 其中, 通过上行解调信息估计信道的变化程度, 包括:
获取所述上行解调信息的方差或者相邻值的差值绝对值;
根据所述方差或所述差值绝对值估计信道的变化程度。
5. 根据权利要求 1所述的方法, 其中, 根据获取的所述变化程度对基站的调度策 略进行调整, 包括:
根据获取的所述变化程度采用相应的目标误块率 BLER或者外环控制门限 调整调度使用的 CQI; 和 /或
根据获取的所述变化程度调整下行数据的发射功率。
6. 根据权利要求 1至 5任一项所述的方法, 其中, 根据获取的所述变化程度对基 站的调度策略进行调整之后, 包括:
执行调整后的所述调度策略, 获取下行数据的选块大小、 码道数、 调制方 式以及发射功率。
7. 一种调度策略的调整装置, 包括:
获取模块, 设置为获取信道的变化程度;
调整模块, 设置为根据获取的所述变化程度对基站的调度策略进行调整, 其中, 所述调度策略用于指示下行数据的发送速率与下行信道的匹配程度。
8. 根据权利要求 7所述的装置, 其中, 所述获取模块, 设置为通过上行解调信息 估计信道的变化程度。
9. 根据权利要求 8所述的装置, 其中, 所述获取模块, 设置为通过以下之一上行 解调消息估计信道的变化程度:
用户设备 UE上报的信道质量指示 CQI、 上行接收信号的频谱扩展、 上行 信道估计值、 上行接收的导频信号的能量。
10. 根据权利要求 8所述的装置, 其中, 所述获取模块包括:
获取单元,设置为获取所述上行解调信息的方差或者相邻值的差值绝对值; 估计单元, 设置为根据所述方差或所述差值绝对值估计信道的变化程度。
11. 根据权利要求 7所述的装置, 其中, 所述调整模块, 设置为根据获取的所述变 化程度采用相应的目标误块率 BLER或者外环控制门限调整调度使用的 CQI; 和 /或, 根据获取的所述变化程度调整下行数据的发射功率。
12. 一种基站, 包括: 权利要求 7-11任一项所述的装置。
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