CN102487531B - Flow control method for flow self-adaption modification of Iub port - Google Patents

Flow control method for flow self-adaption modification of Iub port Download PDF

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CN102487531B
CN102487531B CN 201010581323 CN201010581323A CN102487531B CN 102487531 B CN102487531 B CN 102487531B CN 201010581323 CN201010581323 CN 201010581323 CN 201010581323 A CN201010581323 A CN 201010581323A CN 102487531 B CN102487531 B CN 102487531B
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flow control
tbeta
buffer
step
tbrta
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CN102487531A (en
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王彬
朱颖
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普天信息技术研究院有限公司
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Abstract

本发明提供了一种Iub口流量自适应修正的流控方法,该方法预先设置调整索要缓存量因子(Tbeta),Node B收到流控事件后,执行如下步骤:A、记录本次的流控事件的类型,缓存量和用户PQ队列的空口速率(RatePQ_out);B、根据本次流控事件的类型、以及本次缓存量和前次缓存量的大小来判断是否调整Tbeta,如果是,执行步骤C,否则直接记录Tbeta的值,执行步骤D;C、调整并记录Tbeta的值;D、对于正常流控事件,Node B用记录的Tbeta和RatePQ_out的值计算本次流控向无线网络控制器RNC请求的缓存量,执行流控过程。 The present invention provides a flow control method of adaptively correcting an Iub interface traffic, which is set in advance to adjust the amount of cache request factor (Tbeta), Node B receives the flow control event, perform the following steps: A, the recording of this stream type control event, the buffer volume and a user PQ rate of air interface queue (RatePQ_out); B, to determine the type of this flow control event, and the current buffer size and the size of the last buffer amount of whether to adjust Tbeta, if so, performing step C, and otherwise directly recorded values ​​Tbeta executes step D; C, adjusted and recorded values ​​Tbeta of; D, for normal flow control event, Node B calculates this flow control to a wireless network with the value Tbeta and RatePQ_out recorded buffer amount controller RNC requests, flow control process is performed. 该方法能够提高流控索要数据量的准确性,减少流控的误差,减少缓存的抖动和缓存上下限的触发频率。 This method can improve the accuracy of the amount of request data flow control, flow control to reduce the error, to reduce the lower limit on the trigger frequency jitter buffer and cache.

Description

一种Iub 口流量自适应修正的流控方法 Adaptively correcting an Iub interface traffic flow control method

技术领域 FIELD

[0001] 本发明涉及移动通讯领域,特别涉及一种Iub 口流量自适应修正的流控方法。 [0001] The present invention relates to mobile communications, and more particularly relates to a flow control method of an adaptive correction Iub interface traffic.

背景技术 Background technique

[0002] 随着移动通讯技术从高速下行分组接入(HSDPA)技术演进到高速分组接入增强(HSPA+)技术,在HSPA+技术中数据调度依然在基站(Node B)侧执行,从无线网络控制器(RNC)发来的专用媒介接入控制层协议数据单元(MAC-d PDU)需要在Node B侧进行缓存,等待增强的高速媒介接入控制(MAC-ehs)的调度。 [0002] As mobile communication technology from high speed downlink packet access (HSDPA) technology evolved to enhanced High Speed ​​Packet Access (HSPA +) technology, HSPA + technology still perform data scheduling in the base station (Node B) side, from the radio network control device (RNC) sent to a dedicated medium access control layer protocol data unit (MAC-d PDU) is required at the Node B side of the buffer, wait for the enhanced high speed medium access control (MAC-ehs) scheduling. 由于空口的复杂性和移动信道的不确定性,用户在空口的实际速率受到调度算法性能的影响,同时也直接影响用户数据在NodeB侧的缓存,由于Node B侧的缓存不是无限的,如果Iub 口和空口的速率不匹配,很有可能造成Node B侧缓存溢出,直接影响服务质量,所以Iub 口的数据流量控制非常重要。 Because of the uncertainty complexity and moving channel air interface, the users are in the actual rate of air interface affect performance of the algorithm scheduling, but also directly affects the cached user data in the NodeB side, because the cache Node B side is not unlimited, if Iub port and air port rate mismatch is likely to cause a buffer overflow Node B side, directly affect the quality of service, so the Iub interface data flow control is very important. 其中,空口是指Node B与用户设备(UE)之间的接口,也称Uu 口,而Iub 口是指RNC与Node B之间的接口。 Wherein the air interface refers to an interface between a Node B and a user equipment (the UE), also known as the Uu interface, the Iub interface means an interface between the RNC and the Node B.

[0003] 当流量控制考虑用户缓存大小尽量不影响调度算法的执行的时候,流量控制主要针对Node B端的缓存。 [0003] When considering the flow control performed with minimal impact on the user cache size when scheduling algorithm, a flow control for the main cache Node B side. 目前,Iub 口流量控制主要考虑三方面的问题: Currently, Iub port flow control is mainly considered three issues:

[0004] 1、缓存上限流控。 [0004] 1, the upper limit of the flow control buffer.

[0005] 主要是防止Node B侧的数据缓存堆积太多导致丢包,根据某个固定的值或采用某些公式计算出某个值作为Node B端缓存的数据量上限,一旦发现缓存超过该值,则触发相应的流控操作,减少或停止向RNC索要数据。 [0005] The data cache is to prevent the accumulation of too much Node B side and packet loss, a value is calculated as an upper limit the amount of data in accordance with Node B-side cache a fixed value or using some formulas, once the cache exceeds the value, triggers the corresponding flow control operation, to reduce or stop request data to RNC.

[0006] 申请号为200610084695.1发明专利提出一种Iub 口流量控制方法,当优先级队列中的数据量大于或等于缓存上限值,则基站向RNC发送一个禁止下发数据的容量分配控制帧。 [0006] Patent Application No. 200610084695.1 proposes a Iub interface traffic control method, when the data in the priority queue is greater than or equal to the upper limit of the cache, the base station transmits retransmission data at a capacity allocation control frame to the prohibition RNC.

[0007] 2、缓存下限流控 [0007] 2, the lower limit of the flow control buffer

[0008] 与缓存上限相反,是为了防止Node B侧的数据缓存太少,以至于不够空口的数据传输,甚至被调空,会影响到用户的吞吐量。 [0008] In contrast to the cache limit, in order to prevent the data cache Node B side is too small, enough so that the air interface data transfer, transferred even empty, will affect the throughput of the user. 根据某个固定的值或采用某些公式计算出某个值作为Node B端缓存的数据量下限,一旦发现缓存低过该值,则触发相应的流控操作,加大向RNC索要的数据量。 The use of a fixed value or a certain formula to calculate the lower limit value as the amount of data to Node B-side cache, the cache if it is found lower than this value, the trigger corresponding flow control operation, to increase the amount of data of the request to the RNC .

[0009] 3、正常流控 [0009] 3, the normal flow control

[0010] 当流控机制使用周期流控这种方式,并在周期流控点时,缓存处于上下限之间,且最近一次引起队列缓存减少的原因为正常调度,则触发正常流控,正常流控向RNC索要的数据量应略少于同情况下的缓存下限流控向RNC索要的数据量。 [0010] When the flow control mechanism flow control cycle of this embodiment, and flow control point during the cycle, the cache is in between the upper and lower limits, and the cause of the last queue buffer to reduce the normal scheduling, flow control is triggered normal, normal the amount of data flow control request to the RNC should be slightly less than the lower limit of the amount of data in the cache of the flow control request to the RNC under the same conditions.

[0011]目前流控期间频繁出现缓存低于下限或者缓存高于上限的情况,而且随着用户的信道环境变化越快,流控期间出现上下限流控的次数会越频繁,用户缓存抖动程度就越剧烈,调度算法的执行效果会受到严重影响。 [0011] case of a cache buffer below the lower limit or above the upper limit frequently occurs during flow control, and as the user environment changes faster the channel, the lower limit of the number of occurrences of the flow control will be more frequent during the flow control, the degree of jitter user buffer the more severe, the effect of the implementation of scheduling algorithm can be seriously affected.

[0012] 缓存上限流控可以尽量避免Node B侧的数据缓存堆积太多导致丢包;而缓存下限流控可以尽量给调度算法提供足够的缓存数据量,但毕竟缓存上下限流控都属于补救措施,过多数量的缓存上限流控依然会导致不少的数据分组超时丢弃,且过多数量的缓存下限流控也预示着队列中的数据量长时间不能满足调度算法。 [0012] The upper limit flow control cache data in the cache can avoid the accumulation of too much Node B side and packet loss; buffer limit and flow control may be possible to provide a sufficient amount of buffered data to a scheduling algorithm, but after the cache control flow limit fall remedial measures to limit excessive number of buffer flow control will still cause a lot of timeout data packets discarded, and the lower limit excessive number of cache control flow also indicates that the amount of data in the queue for a long time can not meet the scheduling algorithm. 因此,缓存上下限流控触发的频率一定程度上也是流控算法性能好坏的一个指示器,应当尽可能地减少流控触发的频率,以减少队列缓存的抖动。 Thus, the upper and lower stream cache control trigger frequency to some extent on the quality of the flow control algorithm is an indicator of the performance, reduce the frequency of flow control should be triggered as much as possible to reduce the jitter buffer queue.

[0013]目前周期流控点触发的正常流控,目的是使Iub 口的速率和空口速率相匹配,目前一般采用的流控索要数据量的计算公式为: [0013] The normal cycle currently fluidic flow control trigger point is intended to enable the Iub interface and the air interface at a rate that matches the rate, the flow control request data amount calculated current is generally used:

[0014] Bnodebneed — Ratepgout X Tpcperiod [0014] Bnodebneed - Ratepgout X Tpcperiod

[0015] 其中,Ratepg out为队列的空口平均速率,Tpcjeriod为流控周期。 [0015] wherein, Ratepg out of the air interface average rate queue, Tpcjeriod is a flow control period.

[0016] 而目前空口平均速率Ratepe _的计算主要通过平滑滤波得到,平滑滤波得到的速率与瞬时速率或窗口平均得到的速率相比,变化范围相对较小,且变化速度相对平缓,抖动程度相对较小,这有利于维持队列缓存的稳定性。 Calculation [0016] At present, the average rate of air interface Ratepe _ obtained mainly by smoothing filtering, rate smoothing filter window or instantaneous rate averaged rate obtained as compared to a relatively small range, and relatively gentle speed changes, the relative degree of jitter smaller, which is conducive to maintaining the stability of the queue buffer.

[0017] 申请号为CN200610111951.1的专利中提出对过去一段时间空口速率的统计为: [0017] Patent Application No. CN200610111951.1 proposed statistics over a period of time rate of air interface is as follows:

[0018] R(t) = (la)-R(t~l) + aR(t) [0018] R (t) = (la) -R (t ~ l) + aR (t)

[0019] 其中:¾)为平均下行速率,即空口速率,a为滤波器因子,及(〖-1)为上一传输时间间隔(TTI)时的平均分组下行速率,为当前TTI队列的即时下行速率。 [0019] wherein: ¾) is the average downlink rate, i.e. the rate of air interface, a is the filter factor, and (〖-1) is the average rate at which the downlink packets on a transmission time interval (TTI), TTI queue for the current instant downlink rate.

[0020] 由于现在Node B向RNC索要数据是一次要一个周期时间内的数据量大小,而在一个周期时间内信道环境随时可能发生变化,这就导致正常流控估计的速率有偏差,即索要的数据量相对于实际空口所需的数据量偏大或偏小。 [0020] Now that Node B to the RNC to request the data is a desired amount of data size in a cycle time, and the channel environment may vary in a cycle time at any time, which leads to the normal flow control estimated rate deviation, i.e. request the amount of data with respect to the amount of data required is large or small the actual air interface.

[0021] 另外,平滑滤波有一个弊病就是统计的速率本身有滞后性,只能说明前一段时间内,队列的空口速率,且当前空口速率占平滑滤波后速率的比例往往比较小,根据之前一段时间的空口速率来推算未来一段时间内的空口速率,假设前提是空口速率不会发生变化,但事实上空口速率基本不可能不变,空口速率或多或少都会发生变化,因此,会导致向RNC索要的数据量或多或少跟空口实际需要的数据量有些偏差。 [0021] Further, a smoothing filter has a malady is to count rate itself lag, only instructions within the first period, the queue air interface rate, and the current rate of air interface proportion of the smoothed rates tend to be smaller, according to the previous period rate of air interface time to project the rate of air interface in the next period of time, the assumption is the rate of air interface will not change, but in fact the basic rate of air interface can not be the same, more or less the rate of air interface will change, therefore, will lead to the amount of data the RNC to ask for more or less the amount of data with the air interface needs some deviation.

[0022] 上述两个原因都会进而导致频繁触发上下限,用户缓存抖动剧烈。 [0022] The reasons are two upper and lower trigger leading to frequent, severe jitter user cache. 达到上限的次数越多,很可能导致更多的紧急调度,甚至超时丢包,而下限次数越多,队列在更多时间上缓存过低,严重影响调度算法的执行效果,降低了系统吞吐量。 The more times the upper limit is reached, is likely to lead to more emergency dispatch, even overtime loss, and the more the lower limit frequency and more time on the queue cache is too low, seriously affecting the implementation of the results of the scheduling algorithm reduces the system throughput .

[0023] 另外,一旦触发缓存上下限,则会触发缓存上下限的流控操作,缓存上限流控一般会停止向RNC要数据,而缓存下限流控一般会加大向RNC索要的数据量,此时,如果下限流控索要的数据量过多,反而使缓存很快达到上限,这样导致缓存的抖动更加厉害,进而对接下来以后的流控操作造成更大的困难,更易触发更多的缓存上下限。 [0023] Further, once the upper and lower limits to trigger the cache, the cache will limit the flow control operation, flow control buffer Usually the upper limit stop to the RNC for a data flow control and buffer limit will generally increase the amount of data request to the RNC to trigger, At this point, if the lower limit of the flow control too much to ask for the amount of data, but the cache will soon reach the limit, which leads to more powerful jitter buffer, and cause greater difficulties after the next flow control operation, easier to trigger more cache Upper and lower limits.

发明内容 SUMMARY

[0024] 本发明提供了一种Iub 口流量自适应修正的流控方法,提高流控索要数据量的准确性,减少流控的误差,减少缓存的抖动和缓存上下限的触发频率。 [0024] The present invention provides a flow control method of adaptively correcting an Iub interface flow, improve the accuracy of the amount of request data flow control, flow control to reduce the error, to reduce the lower limit on the trigger frequency jitter buffer and cache.

[0025] 一种Iub 口流量自适应修正的流控方法,该方法预先设置调整索要缓存量因子Tbeta,基站N ode B收到流控事件后,执行如下步骤: [0025] an adaptive correction Iub interface traffic flow control method of the preset amount of adjustment factor Tbeta cache request, the base station N ode B flow control event is received, perform the following steps:

[0026] A、记录本次的流控事件的类型,缓存量和用户优先级PQ队列的空口速率Ratero [0026] A, the recording of this type of flow control event, the buffer volume and the air interface user rate priority queue PQ Ratero

OUt » OUt »

[0027] B、根据本次流控事件的类型、以及本次缓存量和前次缓存量的大小来判断是否调整Tbrta,如果是,执行步骤C,否则直接记录Tbrta的值,执行步骤D ; [0027] B, is determined according to the type of flow control of this event, and the current buffer size and the size of the buffer amount of the previous adjustment if Tbrta, if yes, step C, and otherwise the value Tbrta direct recording, step D;

[0028] C、调整并记录Tbeta的值; [0028] C, and the adjustment value recorded in Tbeta;

[0029] D、对于正常流控事件,Node B用记录的Tbeta和Ratepiujut的值计算本次流控向无线网络控制器RNC请求的缓存量,执行流控过程; [0029] D, for normal flow control event, the value of the recording Tbeta Node B and Ratepiujut The calculated amount of buffer flow control request to the radio network controller RNC performs flow control procedure;

[0030] 其中Tbrta为大于等于O或小于O的数。 [0030] wherein greater than or equal Tbrta O or O is less than the number.

[0031 ] 其中,所述方法中预先设置Tbeta初始值为0,设定Tbeta的上限值为Tbeta up limit,且此上限值大于0,设定Tbrta的下限值为Tbeta d_ limit,且此下限值小于0,Tbrta的上、下限值的绝对值小于流控周期Trc pOTi()d的值,当Tbrta的值变化时,使的Tbrta值在上下限范围内,否则取边界值。 [0031] wherein the method Tbeta preset initial value is 0, the upper limit value is set Tbeta Tbeta up limit, and this upper limit is greater than 0, the lower limit value is set Tbrta Tbeta d_ limit, and this is less than the lower limit value Tbrta 0, Tbrta absolute value, lower value, less than the flow control period Trc pOTi () d value when the value change Tbrta so that in the lower limits, otherwise, it is a boundary value .

[0032] 所述步骤D中计算本次流控向RNC请求的缓存量的方法为:Bmdeb—need = RatepgoutX (TFC_period+Tbeta),中,Tpc—period 为流控周期。 [0032] The amount of the process stream cache control request to the RNC in step D is calculated as: Bmdeb-need = RatepgoutX (TFC_period + Tbeta), in, Tpc-period is a flow control period.

[0033] 所述步骤B中本次流控事件的类型为下限流控,当最近一次缓存量减少的原因为正常调度时,调整Tbeta。 [0033] The step (B) of this type of flow control to the lower limit flow control event, the buffer when the cause of a recent reduction in the normal schedule, adjusted Tbeta.

[0034] 所述步骤C中调整的Tbeta方法为=Tbeta [0034] The step C is a method of adjusting Tbeta = Tbeta

Tbeta+Tbeta—up—step,中,^beta up step 为^beta Tbeta + Tbeta-up-step, in, ^ beta up step for the ^ beta

向上调整的大步长。 Upward adjustment of stride length.

[0035] 所述步骤A中进一步包括记录是否存在紧急数据; [0035] The said step A further comprising a data record whether there is an emergency;

[0036] 所述步骤B中本次流控事件的类型为上限流控或者存在数据紧急,且相邻前一子帧不存在紧急数据时,调整Tbrta。 [0036] The step (B) of this type of flow control to limit the flow control event, or the presence of emergency data, and a sub-frame when the former does not exist adjacent to the emergent data, adjustment Tbrta.

[0037] 所述步骤C中调整的Tbeta方法为:T [0037] The step C adjusted Tbeta method: T

beta Tbeta ^'beta_down_step? beta Tbeta ^ 'beta_down_step?

其中,T Where, T

beta_down_step 为Tbeta beta_down_step is Tbeta

向下调整的大步长。 Downward adjustment of stride length.

[0038] 所述方法预先设置高低缓存判决门限,其介于缓存上限和缓存下限之间; [0038] The method set in advance the level of the decision threshold cache, cache interposed between the upper and lower limits cache;

[0039] 所述步骤B中本次流控事件的类型为正常流控,缓存量在缓存高低判决门限与上限之间,且上次流控为下限流控时,调整Tbrta。 [0039] When the step (B) of this type of flow control event control limit of normal flow, the amount of buffer in the buffer level of the decision threshold between the upper limit and the lower limit of the last flow control flow control, adjusting Tbrta.

[0040] 所述方法预先设置高低缓存判决门限,其介于缓存上限和缓存下限之间; [0040] The method set in advance the level of the decision threshold cache, cache interposed between the upper and lower limits cache;

[0041] 所述步骤B中本次流控事件的类型为正常流控,缓存量在缓存高低判决门限与上限之间,上次流控为正常流控,且上次缓存量位于高低判决门限与下限之间时,调整Tbrta。 [0041] The step (B) of this type of flow control event is a normal flow control, limit the amount of buffer in the buffer and between the upper decision threshold level, the last normal flow control flow control, and the last buffer amount is within the level of the decision threshold and it is between the lower limit, adjustment Tbrta.

[0042] 所述方法预先设置高低缓存判决门限,其介于缓存上限和缓存下限之间; [0042] The method set in advance the level of the decision threshold cache, cache interposed between the upper and lower limits cache;

[0043] 所述步骤B中本次流控事件的类型为正常流控,缓存量在缓存高低判决门限与上限之间,上次流控为正常流控,上次缓存量位于高低判决门限与上限之间,且此时缓存量大于上次流控时的缓存量时,调整Tbrta。 [0043] The step (B) of this type of flow control event in the buffer upper limit of the normal decision threshold level of flow control, the amount of buffer between the last flow control to the normal flow control, the last buffer amount is within the level of the decision threshold and between the upper limit, and the case when the buffer amount is greater than the last cache when the flow control is adjusted Tbrta.

[0044] 所述步骤C中调整的Tbeta方法为:T [0044] The step C adjusted Tbeta method: T

beta Tbeta Tbeta_down—small_step ? 其中, Tbeta—down—small_ beta Tbeta Tbeta_down-small_step? which, Tbeta-down-small_

step为Tbeta向下调整的小步长。 step length Tbeta downward adjustment in small steps.

[0045] 所述方法预先设置高低缓存判决门限,其介于缓存上限和缓存下限之间; [0045] The method set in advance the level of the decision threshold cache, cache interposed between the upper and lower limits cache;

[0046] 所述步骤B中本次流控事件的类型为正常流控,缓存量在缓存高低判决门限与下限之间,上次流控命令为正常流控,且上次流控缓存量位于高低判决门限和上限之间时,调 [0046] The step (B) of this type of flow control event control limit of normal flow, the amount of buffer in the buffer between a lower level and the decision threshold, the last command is a normal flow control flow control, flow control and the last buffer amount is located when the decision between high and low threshold and ceiling, adjusting

MT MT

^beta0 ^ Beta0

[0047] 所述方法预先设置高低缓存判决门限,其介于缓存上限和缓存下限之间; [0047] The method set in advance the level of the decision threshold cache, cache interposed between the upper and lower limits cache;

[0048] 所述步骤B中收到的流控事件为正常流控,缓存量在缓存高低判决门限与下限之间,上次流控命令为正常流控,上次流控缓存量位于高低判决门限和下限之间,且此时缓存量小于上次流控缓存量时,调整Tbeta。 [0048] Step B the flow control event is received in the normal flow control, limit the amount of buffer in the buffer between a lower level and the decision threshold, the last normal command flow control flow control, the last buffer amount is within the high and low flow control decision between a lower threshold and when, at this time and the last buffer amount is less than the amount of the flow control buffer, adjusted Tbeta.

[0049]所述步骤 C 中调整的Tbeta 方法为:Tbeta = Tbeta+Tbeta up_smalLstep [0049] The step C adjusted Tbeta method: Tbeta = Tbeta + Tbeta up_smalLstep

,見:中,Tbeta—up—small—step See: China, Tbeta-up-small-step

为Tbeta向上调整的小步长。 Tbeta is adjusted upward in small steps.

[0050] 由以上技术方案可见,收到流控事件后,通过记录的Tbeta计算NodeB向RNC索要的数据量,并根据最近的流控事件,以及本次和前次缓存大小的对比,来调整、并记录Tbrta,对于正常流控事件,用记录的Tbrta计算向RNC请求的缓存量,这种通过动态调整Tbrta来达到Iub 口速率跟空口速率更为精细的匹配的方法,提高流控索要数据量的准确性,减少流控的误差,减少缓存的抖动和缓存上下限的触发频率。 [0050] seen from the above technical solution, after receiving the flow control event, the amount of data request NodeB to the RNC is calculated by Tbeta recorded, and according to the most recent flow control event, and this comparison and the previous cache size to adjust and recording Tbrta, for normal flow control event, the buffer size calculated by the RNC requesting Tbrta recording, this is achieved by dynamically adjusting Tbrta Iub interface rate with more elaborate air interface rate matching methods to improve data flow control request the amount of accuracy of flow control to reduce the error, to reduce the lower limit on the trigger frequency jitter buffer and cache.

附图说明 BRIEF DESCRIPTION

[0051] 图1为本发明Iub 口流量自适应修正的流控方法的流程图; [0051] FIG. 1 is a flowchart of an adaptive flow control method of correcting the flow rate of the present invention, the Iub interface;

[0052] 图2为本发明具体实施例1ub 口流量自适应修正的流控方法的流程图。 [0052] FIG 2 is a flowchart of an adaptive flow control method according to the correction flow port 1ub particular embodiment of the present invention.

具体实施方式 Detailed ways

[0053] 为使本发明的目的、技术方案及优点更加清楚明白,以下参照附图并举实施例,对本发明所述方案作进一步地详细说明。 [0053] To make the objectives, technical solutions and advantages of the present invention will become more apparent, with reference to the accompanying drawings and the following embodiments, the embodiment of the present invention will be described in further detail.

[0054] 本发明流控方法的主要思想是当收到流控事件时,通过本次流控事件,以及本次缓存量和前次缓存量的大小对比,来调整,并记录Tbrta,对于正常流控事件,用记录的Tbeta来计算向RNC索要的缓存量。 [0054] The main idea of ​​the present invention is a method of flow control when the flow control event is received, by this flow control event, and the current buffer size and the size of the last buffer amount of the comparison to adjust and record Tbrta, for normal flow control event, with recorded Tbeta calculates the amount of cache request to the RNC.

[0055] 为能够更为详细地描述队列缓存量在上下限间的状态,引入了缓存高低判决门限的概念,介于上限和下限之间,取值为: [0055] The queue buffer amount can be described in more detail in the state between the upper and lower limits, the concept of the decision threshold level cache, between upper and lower limits, the value is:

[0056] 缓存高低判决门限=下限+0.5*(上限-下限), [0056] cache limit level of the decision threshold = 0.5 * + (upper - lower),

[0057] 即如果实际缓存值高于该门限值,则缓存量更加接近于上限值,可以认为缓存触发上限的概率加大,需要进行缓存量的控制;如果实际缓存值低于该门限值,则缓存量更加接近于下限值,可以认为缓存触发下限的概率加大,需要进行缓存量的补充。 [0057] i.e., if the actual value is above the threshold value the cache, the cache is closer to the upper limit of the amount, the upper limit may be considered to increase the probability of triggering a cache, the cache controlling the amount of required; if the actual value is below the gate buffer limit, the amount of cache closer to the lower limit, the probability of a cache can be considered lower trigger increased, the need to supplement the amount of cache.

[0058] 本方法主要通过引入调整索要缓存量因子(Tbrta)来调整正常流控时,向RNC端索要的数据量,且通过动态调整Tbeta来达到Iub 口速率跟空口速率更为精细的匹配,进而降低上下限流控触发的频率。 When [0058] The present method adjusts to the normal flow control by introducing adjustment request buffer volume factor (Tbrta), the amount to the RNC end request data, and by dynamically adjusting Tbeta achieved Iub interface rate with the rate of air interface finer match, thereby reducing the frequency of the upper and lower flow control trigger.

[0059] 正常流控操作,基站(Node B)向RNC请求的缓存量为: [0059] Normal operation of flow control, the base station (Node B) to the RNC requesting the buffer size is:

[0060] Bnodeb need = Ratepg out X (TFC period+Tbeta),其中:Bntjdeb need 为一个流控周期内RNC 需要传送给Node B的数据量(bit),如该值计算小于0,则取为O ;TTCj)eri(xl为可配置的流控周期长度(ms) ;RatePQ()Ut为用户PQ队列的空口速率(kbps) ;Tbeta为调整索要缓存量因子(ms)。 [0060] Bnodeb need = Ratepg out X (TFC period + Tbeta), wherein: Bntjdeb need within a flow control period RNC need to send to the amount of the Node B Data ( 'bit), if the value calculated is less than 0, then taken as O ; TTCj) eri (xl is a flow control period length (ms configurable); RatePQ () Ut empty queue PQ user interface rate (kbps); Tbeta request to adjust buffer size factor (ms).

[0061] Node B预先配置,设定Tbeta初始值为0,设定Tbeta的上限值为Tbeta up limit,且此上限值大于0,设定Tbrta的下限值为Tbeta d_ limit,且此下限值小于0,Tbeta的上、下限值的绝对值小于的值,当Tbrta的值变化时,确保Tbrta的值在上下限范围内,否则取边界值,设定Tbeta 值增长的步长Tbeta—up—step 和Tbeta—up—small—step, Tbeta 值减小的步长Tbeta—d_—step 和Tbeta—up— [0061] Node B is preconfigured set Tbeta initial value is 0, the upper limit value is set Tbeta Tbeta up limit, and this upper limit is greater than 0, the lower limit value is set Tbrta Tbeta d_ limit, and this the lower limit is less than 0, the absolute value of the Tbeta, smaller than the lower limit value, when the value changes Tbrta ensure Tbrta step value is within the upper and lower limits, otherwise, it is the boundary value, the set value increase long Tbeta Tbeta-up-step and Tbeta-up-small-step, Tbeta value decreases in steps Tbeta-d_-step and Tbeta-up-

small_step, 其中,Tbeta—down—step 矛口Tbeta—down—small_step small_step, wherein, Tbeta-down-step lance port Tbeta-down-small_step

为向下调整Tbrta的步长,配置要求 Tbrta to adjust the down step, configuration requirements

Tbeta—down—small_ Tbeta-down-small_

step大于0小于等于Tbeta—d_—step的一半,且Ttoa—d_—大于0,小于等于下限绝对值的一半, is greater than 0 and less than equal to half step Tbeta-d_-step, and Ttoa-d_- greater than 0 and less than equal to half the lower limit of the absolute value,

而Tbeta_ _up_step 矛口Tbeta_up_small_step The Tbeta_ _up_step spear mouth Tbeta_up_small_step

为向上调整Tbrta的步长,配置要求Tbeta upstep大于O小于等于上限的一半,Tbrta—up—small—_大于0,小于等于Tbrta up step的一半,以达到粗调微调相结合的效 Tbrta upward adjustment of the step size, configuration requirements Tbeta upstep greater than half the upper limit or less O, Tbrta-up-small-_ is greater than 0, equal to less than half Tbrta up step in order to achieve Coarse Fine combined effect

,而I Tbeta—down—step 丁- T^eta—up—step,T^eta—down—small—step 丁- T^eta—up—small—step, , And I Tbeta-down-step D - T ^ eta-up-step, T ^ eta-down-small-step-butoxy - T ^ eta-up-small-step,

以达到快降慢升的效 Slow down in order to achieve fast rise effect

果O If O

[0062] 参见图1,图1为本发明Iub 口流量自适应修正的流控方法的流程图。 [0062] Referring to FIG. 1, FIG. 1 is a flowchart of an adaptive flow control method of correcting the Iub interface traffic invention. 具体步骤包括: These steps include:

[0063] 步骤101,Node B收到流控事件,记录本次的流控事件的类型,缓存量和用户PQ队列的空口速率Ratepg QUt。 [0063] Step 101, Node B receive the flow control event, the recording of this type of flow control event, the buffer size and the air interface user rate of the PQ Ratepg QUt.

[0064] 步骤102,根据本次流控事件的类型、以及本次缓存量和前次缓存量的大小来判断是否调整Tbeta,如果是,执行步骤103,否则执行步骤104.[0065] 步骤103,调整并记录Tbeta的值。 [0064] Step 102, the current is determined according to the type of flow control event, and the current buffer size and the size of the buffer amount of the previous adjustment Tbeta whether, and if so, step 103 is performed, otherwise step 104. [0065] Step 103 , and adjust the recorded values ​​Tbeta.

[0066] 步骤104,直接记录Tbeta的值。 [0066] Step 104, the value Tbeta recorded directly. [0067] 步骤105,对正常流控事件,用记录的Tbeta的值和RatePQ—_的值计算本次流控向RNC请求的缓存量,执行流控过程。 [0067] Step 105, normal flow control event, the flow control is calculated using this value and the RatePQ-_ Tbeta recording request to the RNC buffer size, flow control procedure performed.

[0068] 下面以一个具体的实施例,来详细说明本发明。 [0068] In the following a specific embodiment, the present invention will be described in detail.

[0069] 参见图2,图2为本发明具体实施例1ub 口流量自适应修正的流控方法的流程图。 [0069] Referring to FIG. 2, FIG. 2 is a flowchart of an adaptive flow control method according to the correction flow port 1ub particular embodiment the invention. 具体步骤包括: These steps include:

[0070] 步骤200,Node B收到流控事件,记录当前流控类型,当前缓存量,是否存在紧急数据,用户PQ队列的空口速率。 [0070] Step 200, Node B receive the flow control event, the flow control type recording current, the current buffer amount, presence or absence of urgent data, air interface user rate queue PQ.

[0071] 步骤201,判断流控事件类型,如果是下限流控,执行步骤202 ;如果是上限流控时,执行步骤206 ;如果是正常流控,执行步骤207。 [0071] Step 201, the flow control event type is determined, if the lower limit of the flow control, step 202 is performed; if it is the upper limit of the flow control, the step 206 is performed; if it is a normal flow control, step 207 is executed.

[0072] 步骤202,判断最近一次缓存量减少的原因是否是正常调度,如果是,执行步骤203,否则执行步骤215。 [0072] Step 202 determines that the factor of reduction last buffer amount is a normal scheduling, if so, step 203 is performed, otherwise step 215 is performed.

[0073]少骤 203,调整Tbeta,Tbeta — Tbeta+Tbeta—up—step。 [0073] less arrest 203, adjustment Tbeta, Tbeta - Tbeta + Tbeta-up-step.

[0074] 触发下限流控时,若PQ最近一次缓存量减少的原因为正常调度,则说明Iub 口速 [0074] When the lower trigger flow control, when the last buffer amount PQ decrease is attributable to the normal schedule, then the Iub interface speed

率不能满足调度算法的需求,因此需加大Iub 口速率,向上调整Tbeta值,使Tbeta = Tbeta+Tbeta_ Rate can not meet the needs of the scheduling algorithm, and therefore need to increase the rate of the Iub interface, to adjust the value up Tbeta the Tbeta = Tbeta + Tbeta_

up_step0 up_step0

[0075] 步骤204,判断调整后的Tbeta是否小于0,如果是,执行步骤205,否则执行步骤215。 [0075] Step 204, Tbeta determines the adjustment is less than 0. If yes, step 205 is executed, otherwise, step 215 is performed.

[0076] 步骤205,强制调整后的Tbeta等于O。 [0076] Step 205, Tbeta the adjustment force equal to O.

[0077] 若向上调整Tbeta值后,Tbeta仍然小于0,则强制Tbeta值为O ;若向上调整Tbeta值后,Tbeta大于等于0,则维持调整后的Tbrta。 [0077] If the upward adjustment value Tbeta, Tbeta is still less than 0, the force Tbeta is O; if the value is adjusted upward Tbeta, Tbeta than or equal to 0, Tbrta adjusted is maintained.

[0078] 步骤206,当流控类型为上限流控或者数据紧急,且相邻前一子帧不存在紧急数据时,调整 [0078] Step 206, when the upper limit of the flow control type flow control or emergency data, the emergent data and the absence of an adjacent previous subframe, adjusting

Tbeta,Tbeta ^beta ^beta down step ° Tbeta, Tbeta ^ beta ^ beta down step °

[0079] 触发上限流控时,说明Iub 口速率已经超过调度算法的需求,数据开始在队列缓存中堆积,此时应当降低Iub 口速率,向下调整Tbrta的值。 When [0079] the upper trigger flow control described Iub interface rate has exceeded demand scheduling algorithm, the data cache start up in the queues, the Iub interface rate should be reduced at this time, the adjustment value Tbrta downward.

[0080] 若本子帧,队列数据达到紧急状态,且相邻前一子帧不存在紧急的数据,说明调度算法长时间没有调度本队列,因此需要降低Iub 口速率,向下调整Tbrta的值。 [0080] If this subframe, the queue data reaches a state of emergency, urgent data is not present and an adjacent previous subframe, the scheduling algorithm described the present time no scheduling queue, it is necessary to reduce the Iub interface rate adjustment value Tbrta downward.

[0081] 上述两种情况都需要向下调整Tbrta的值,使 [0081] Both cases require downward adjustments Tbrta value of the

Tbeta Tbeta-Tbeta_down—step 0 Tbeta Tbeta-Tbeta_down-step 0

[0082] 步骤207,判断缓存量是否大于缓存高低判决门限,如果是,执行步骤208,否执行步骤212。 [0082] Step 207 determines whether the buffer amount is greater than the decision threshold level cache, and if so, step 208 is performed, otherwise step 212 is performed.

[0083] 步骤208,判断上次流控命令是否为下限流控,如果是,执行步骤211,否则执行步骤209。 [0083] Step 208 determines whether the last command for the flow control flow control limit, if yes, step 211 is performed, otherwise, step 209 is executed.

[0084]当周期流控时,触发了正常流控,且缓存量位于缓存高低判决门限与上限之间,而上次流控命令为下限流控时,说明上次流控后,经过一段时间,队列缓存量上涨到缓存高低判决门限以上了,此时可以适当降低Iub 口速率,向下微调Tbrta值。 [0084] When the flow control cycle, triggering the normal stream control, and the amount of buffer in the cache and the level of the decision threshold between the upper limit and the lower limit of the last flow control command for the flow control, flow control instructions after the last, after a period of time , the amount of queue buffer cache to rise to the level of the decision threshold, then the Iub interface may be suitably reduced rate, downward trim Tbrta value.

[0085] 步骤209,上次流控为正常流控,判断当时缓存量是否位于缓存高低判决门限与下限之间,如果是,执行步骤211,否则执行210。 [0085] Step 209, the last normal flow control flow control, it is determined whether the amount of buffer in the cache when the level decision between the lower threshold and, if yes, perform step 211, otherwise, execute 210.

[0086] 当周期流控时,触发了正常流控,且缓存量位于缓存高低判决门限与上限之间,而上次流控命令也为正常流控,但是上次流控时,缓存量位于缓存高低判决门限与下限之间,说明上次流控后,经过一段时间,队列缓存上涨到缓存量高低判决门限以上了,此时可以适当降低Iub 口速率,向下微调Tbrta值。 [0086] When the flow control cycle, triggering the normal flow control, and the amount of cache in the cache level of the decision threshold between the upper limit, while the last flow control command is also normal flow control, but the last time the flow control, the amount of cache located cache and the level of the decision threshold between a lower, indicating the last flow control, over time, the amount of buffer queue buffer up to the level above the decision threshold, then the Iub interface may be suitably reduced rate, downward trim Tbrta value.

[0087] 步骤210,上次流控为正常流控,且当时缓存量位于缓存高低判决门限和上限之间之间,判断此时的缓存量是否大于上次缓存量,如果是,执行步骤211,否则执行步骤215。 [0087] Step 210, the last normal flow control flow control, and when the buffer amount is in the cache and the level of the decision threshold between an upper limit, the determination at this time is greater than the last buffer amount of the buffer size, if so, step 211 is performed otherwise, step 215 is performed.

[0088] 当周期流控时,触发了正常流控,且缓存量位于缓存高低判决门限与上限之间,而上次流控命令为正常流控,但触发上次流控时队列缓存量位于缓存高低判决门限和上限之间,且此时的队列缓存量大于上次流控时的队列缓存量,说明,上次流控后,经过一段时间,队列缓存仍旧位于缓存高低判决门限以上,且一定程度地上涨,此时,可以适当降低Iub 口速率,向下微调Tbrta值。 [0088] When the flow control cycle, triggering the normal stream control, and the amount of buffer in the cache and the level of the decision threshold between the upper limit, the last command is a normal flow control flow control, but the amount of queue buffer is located at the last trigger flow control between the cache and the upper decision threshold level, and at this time the queue buffer in the queue buffer amount is greater at the previous flow control instructions, the last flow control, over time, the cache queue buffer is still located above the level of the decision threshold, and up to a certain extent, this case can be appropriately reduced Iub interface rate, downward trim Tbrta value.

[0089]少骤 211,调整Tbeta, Tbeta — Tbeta_Tbeta—d()wn—small—step。 [0089] less arrest 211, adjustment Tbeta, Tbeta - Tbeta_Tbeta-d () wn-small-step.

[0090] 当经过判断,需要对Tbrta值向下微调时,使 [0090] When the determination elapsed, the need for fine adjustment Tbrta downward to

Tbeta Tbeta-Tbeta—down—small—step ° Tbeta Tbeta-Tbeta-down-small-step °

[0091] 步骤212,上次流控命令为正常流控,判断当时的缓存量是否位于缓存高低判决门限和上限之间,如果是,执行步骤214,否则执行步骤213。 [0091] Step 212, the last normal flow control flow control command, then determining whether the amount of buffer in the cache and the level of the decision threshold between the upper limit, if yes, step 214 is performed, otherwise step 213 is performed.

[0092] 当周期流控时,触发了正常流控,且缓存量位于缓存高低判决门限和下限之间,而上次流控命令为正常流控,且触发上次流控时,队列缓存位于缓存高低判决门限和上限之间,说明,上次流控后,经过一段时间,队列缓存量由缓存高低判决门限以上下降到缓存高低判决门限以下,此时,可以适当增大Iub 口速率,向上微调Tbrta值。 When [0092] When the flow control cycle, triggering the normal stream control, and the amount of buffer in the cache and the level between the lower decision threshold, the flow control command is the last normal flow control, flow control and the last trigger, located in the queue buffer between the decision threshold level cache and an upper limit, indicating that, after the last flow control, over time, the cache queue buffer level decreased from above the decision threshold level of the decision threshold to the cache, this time can be appropriately increased Iub interface rate, up trimming Tbrta value.

[0093] 步骤213,上次流控命令为正常流控,且当时的缓存量位于缓存高低判决门限和下限之间,判断此时的缓存量是否小于上次流控的缓存量,如果是,执行步骤214,否则执行步骤215。 [0093] Step 213, the last command is a normal flow control flow control, and then the amount of buffer is in the cache and the level of the decision threshold between a lower limit, it is determined at this time is smaller than the amount of cache the last buffer amount of the flow control, and if so, step 214 is performed, otherwise step 215 is performed.

[0094] 当周期流控时,触发了正常流控,且缓存量位于缓存高低判决门限和下限之间,而上次流控命令为正常流控,且触发上次流控时,队列缓存同样位于缓存高低判决门限和下限之间,但此时的队列缓存小于上次流控时的队列缓存,说明,上次流控后,经过一段时间,队列缓存始终位于缓存高低判决门限以下,且有一定程度地下降,此时,可适当增大Iub 口 When [0094] When the flow control cycle, triggering the normal stream control, and the amount of buffer in the cache and the level between the lower decision threshold, the flow control command is the last normal flow control, flow control and trigger the last, the same queue buffer It is in the cache and the level between the lower decision threshold, but this time the buffer queue is less than at the previous queue buffer flow control instructions, the last flow control, over time, always in the queue buffer cache level decision threshold, and there dropped to a certain extent, this time can be appropriately increased Iub interface

速率,向上微调Tbeta值。 Rate, up Tbeta trim value.

[0095]少骤 214,调整Tbeta,Tbeta — Tbeta+Tbeta—up—small—step。 [0095] less arrest 214, adjustment Tbeta, Tbeta - Tbeta + Tbeta-up-small-step.

[0096] 当经过判断,需要对Tbrta值向上微调时,使 [0096] When the determination elapsed, the need for trimming upward Tbrta value, so that

Tbeta Tbeta+Tbeta—up—small—step 0 Tbeta Tbeta + Tbeta-up-small-step 0

[0097]步骤 215,Node B 记录Tbeta 的值。 [0097] Step 215, Node B Tbeta the recorded values.

[0098] 当不需要调整Tbeta时,Node B将Tbeta直接记录,当需要调整Tbeta时,Node B将调整后的Tbrta记录,以备需要向RNC请求缓存量时,提供Tbrta来计算索要的数据量。 [0098] When no adjustment Tbeta, the Node B Tbeta recorded directly, when required to adjust Tbeta, Tbrta Node B after recording the adjustments needed to prepare a request to the RNC when the amount of buffer, calculates the amount of data provided Tbrta it demanded by .

[0099] 除了上文提到的调整Tbeta的情况,其它情况均不做Tbrta调整,直接记录原先的Tbeta的值。 [0099] In addition to the case of the above-mentioned adjustment Tbeta, Tbrta do not otherwise adjust the value of the original Tbeta directly recorded.

[0100] 步骤216,对于正常流控事件,Node B用记录的Tbeta计算向RNC请求的缓存量,执行流控过程。 [0100] Step 216, for normal flow control event, Node B with the buffer size computation request to the RNC Tbeta record, perform flow control procedure.

[0101] 用记录的Tbrta计算向RNC请求的缓存量的方法为: [0101] The method for calculating the buffer size to RNC Tbrta requested record is:

[0102] Bnodeb need — Ratepg outX (TFC period+Tbeta),其中Tbeta 为Node B 记录的Tbetat, [0102] Bnodeb need - Ratepg outX (TFC period + Tbeta), wherein the Node B is recorded Tbeta Tbetat,

[0103] 本发明用调整的Tbeta计算正常流控时向RNC请求缓存量,对于上下限流控时流量请求同现有技术处理方法一致,不在本发明要解决的问题之内。 [0103] When the present invention is used to adjust the flow control of normal Tbeta request to the RNC buffer size, the flow rate for the same flow control request with the upper and lower prior art processing method, the problem is not to be solved by the present invention.

[0104] 综上所述,在本发明正常流控操作中,Node B收到流控事件,向RNC请求缓存量的计算公式中,引入了Tbrta ;以最近的流控事件、缓存状态、前后两次缓存大小的比较,以及缓存量和缓存高低判决门限的比较来进行动态地调整Tbrta参数,并将其值记录,向RNC请求缓存量时用记录的Tbrta计算索要的缓存量,使对流控命令的调整符合空口速率的要求,弥补流控的误差,提高流控的准确度,降低用户缓存抖动程度和缓存上下限触发的频率。 [0104] In summary, in the normal operation of flow control according to the present invention, Node B receive the flow control event, the buffer amount RNC requests are calculated, introducing a Tbrta; to the most recent flow control event, the buffer state, before and after comparison of the two cache size, cache and buffer size, and comparing the level of the decision threshold to be dynamically adjusted Tbrta parameter, and its value is recorded when the recording request to the RNC Tbrta calculates the amount of cache request buffer amount of control of convection adjustment command line with the requirements of air interface rate, to compensate the error of the flow control, improve the accuracy of flow control, reduce the frequency and level of the user the jitter buffer cache limit triggering.

[0105] 以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明保护的范围之内。 [0105] The foregoing is only preferred embodiments of the present invention but are not intended to limit the present invention, all within the spirit and principle of the present invention, any changes made, equivalent substitutions and improvements should be included within the scope of protection of the present invention.

Claims (3)

1.一种Iub 口流量自适应修正的流控方法,其特征在于,该方法预先设置调整索要缓存量因子Tbeta,基站Node B收到流控事件后,执行如下步骤: A、记录本次的流控事件的类型,缓存量和用户优先级PQ队列的空口速率Ratepe wt ; B、根据本次流控事件的类型、以及本次缓存量和前次缓存量的大小来判断是否调整Tbeta,如果是,执行步骤C,否则直接记录Tbrta的值,执行步骤D ; C、调整并记录Tbrta的值; D、对于正常流控事件,Node B用记录的Tbeta和Ratepiujut的值计算本次流控向无线网络控制器RNC请求的缓存量,执行流控过程; 其中Tbrta为大于等于O或小于O的数; 其中,当所述步骤B中本次流控事件的类型为下限流控,当最近一次缓存量减少的原因为正常调度时,调整Tbrta ;所述步骤C中调整Tbrta的方法为:Tbrta=Tbrta+Tbrta—up—stop ; 所述步骤A中进一步包括记录是否存在紧 Fluidic adaptive correction 1. A flow Iub interface, characterized in that the method is set in advance to adjust the amount of factor Tbeta cache request, the base station Node B receives the flow control event, perform the following steps: A, this is recorded type flow control event, the buffer size and the user priority rate of air interface PQ queues Ratepe wt; B, to determine the type of this flow control event, and the current buffer size and the size of the last buffer amount of whether to adjust Tbeta, if It is performed step C, and otherwise the value Tbrta direct recording, step D; C, adjusted and recorded values ​​Tbrta of; D, for normal flow control event, the value Tbeta Node B recording and Ratepiujut calculating this flow control to buffer amount radio network controller RNC requests, execution control process; O wherein Tbrta equal to or greater than the number of less than O; wherein, when the type of the step B of this flow control to limit the flow control event, when the last the decrease of the amount of buffer normally scheduled when adjusting Tbrta; method in the step C is adjusted Tbrta: Tbrta = Tbrta + Tbrta-up-stop; said step a further comprises the record exists tight 数据;当所述步骤B中本次流控事件的类型为上限流控或者存在数据紧急,且相邻前一子帧不存在紧急数据时,调整Tbeta ;所述步骤C 中调整Tbeta 的方法为=Tbeta=Tbeta-Tbeta down step ; 所述方法进一步包括:预先设置高低缓存判决门限,其介于缓存上限和缓存下限之间; 当所述步骤B中本次流控事件的类型为正常流控,缓存量在缓存高低判决门限与上限之间,且上次流控为下限流控时,调整Tbrta;当所述步骤B中本次流控事件的类型为正常流控,缓存量在缓存高低判决门限与上限之间,上次流控为正常流控,且上次缓存量位于高低判决门限与下限之间时,调整Tbrta;当所述步骤B中本次流控事件的类型为正常流控,缓存量在缓存高低判决门限与上限之间,上次流控为正常流控,上次缓存量位于高低判决门限与上限之间,且此时缓存量大于上次流控时的缓存量时,调 Transactions; type when the step B of this flow control to limit the flow control event, or the presence of data in emergency, when a sub-frame before the present data is not urgent and adjacent to, adjusting Tbeta; method in the step C is adjusted Tbeta = Tbeta = Tbeta-Tbeta down step; said method further comprising: previously setting the decision threshold level cache, a cache interposed between the upper and lower limits cache; when the type of the step B of this flow control to the normal flow control event , an amount of buffer between the threshold and the upper limit judgment level cache, and last flow control flow control to the lower limit, adjustment Tbrta; when the type of the step B of this flow control to the normal flow control event, the buffer size level cache and between the upper decision threshold, the last normal flow control flow control, the last time and the amount of buffer is located between the high and low limit threshold decision, adjust Tbrta; when the type of the step B of this flow control to the normal flow of events control, limit the amount of buffer in the buffer level of the decision threshold between the upper and the last flow control to the normal flow control, the last buffer amount is within the level of the decision threshold between the upper limit, and at this time the buffer amount is greater at the time of the last buffer flow control when, tune 整Tbrta ;所述步骤C中调整Tbeta的方法为•Tbet Tbeta Tbeta—down—small—step » 当所述步骤B中本次流控事件的类型为正常流控,缓存量在缓存高低判决门限与下限之间,上次流控命令为正常流控,且上次流控缓存量位于高低判决门限和上限之间时,调整Tbeta ;当所述步骤B中收到的流控事件为正常流控,缓存量在缓存高低判决门限与下限之间,上次流控命令为正常流控,上次流控缓存量位于高低判决门限和下限之间,且此时缓存量小于上次流控缓存量时,调整Tbrta ;所述步骤C中调整Tbrta的方法为:Tbeta=Tbeta+Tbrta—up—small—step » 其中, Tbeta—up_small_step 大于0且小于等于Tbeta—up_step 的一半»Tbeta—down—small_step大于0且小于等于Tbrta—d_—ste;p的一半。 Whole Tbrta; method in the step C adjusted to Tbeta • Tbet Tbeta Tbeta-down-small-step »type when the step B of this flow control to the normal flow control event, the buffer size and the buffer threshold level decision It is between the lower limit, the previous control command is a normal stream flow control, flow control and the last buffer amount is within the level of the decision threshold between the upper limit and adjusted Tbeta; flow control event is received when the step B is a normal flow control , an amount of buffer between the buffer level of the decision threshold and the lower limit, the previous command is a normal flow control flow control, the last amount of the flow control buffer located between the level of the decision threshold and a lower limit, and at this time the buffer amount is less than the last buffer amount of the flow control when adjusting Tbrta; method in the step C is adjusted Tbrta: Tbeta = Tbeta + Tbrta-up-small-step »wherein, Tbeta-up_small_step greater than 0 and less than or equal to one half of Tbeta-up_step» Tbeta-down-small_step greater than 0 and less than or equal to Tbrta-d_-ste; half of p.
2.根据权利要求1所述的方法,其特征在于,所述方法中预先设置Tbrta初始值为0,设定Tbrta的上限值为Tbrtauplimit,且此上限值大于0,设定Tbeta的下限值为Tbrta—d_—limit,且此下限值小于0,Tbeta的上、下限值的绝对值小于流控周期TFej)CTi()d的值,当Tbeta的值变化时,使的Tbrta值在上下限范围内,否则取边界值。 2. The method according to the claim 1, characterized in that the method Tbrta preset initial value is 0, the upper limit value is set Tbrta Tbrtauplimit, and this upper limit is greater than 0, the set Tbeta limit is Tbrta-d_-limit, and this lower limit is less than 0, the Tbeta absolute value is smaller than the lower limit of the flow control period TFej) CTi () d value when the value change Tbeta make the Tbrta within a lower limit on the value, otherwise, it is a boundary value.
3.根据权利要求1或2所述的方法,其特征在于,所述步骤D中计算本次流控向RNC请求的缓存量的方法为:Bn— = Ratepg outX (Trcj)OTi()d+Tbrta),其中,Tpc period为流控周期。 3. The method of claim 1 or claim 2, characterized in that, in this method the amount of buffer flow control request to the RNC in the step D is calculated as: Bn- = Ratepg outX (Trcj) OTi () d + Tbrta), wherein, Tpc period of flow control periods.
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