CN105744568A - Method and device of flow control for reducing RLC (Radio Link Control) layer data retransmission - Google Patents

Method and device of flow control for reducing RLC (Radio Link Control) layer data retransmission Download PDF

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Publication number
CN105744568A
CN105744568A CN201410742260.6A CN201410742260A CN105744568A CN 105744568 A CN105744568 A CN 105744568A CN 201410742260 A CN201410742260 A CN 201410742260A CN 105744568 A CN105744568 A CN 105744568A
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CN
China
Prior art keywords
time period
tdelay
viub
flow control
vuu
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CN201410742260.6A
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Chinese (zh)
Inventor
刘志斌
刘银磊
李军
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ZTE Corp
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ZTE Corp
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Priority to CN201410742260.6A priority Critical patent/CN105744568A/en
Priority to PCT/CN2015/090171 priority patent/WO2016090986A1/en
Publication of CN105744568A publication Critical patent/CN105744568A/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints

Abstract

The present invention discloses a method and device of flow control for reducing RLC (Radio Link Control) layer data retransmission. The method comprises: determining the time period of downlink business data buffer memory average time Tdelay of UE, and regulating flow control according to a presetting rule according to the time period. Prior to the time period of the Tdelay of the UE, the method also comprises: setting a plurality of time periods in advance according to the downlink data business performance, and recording the Tdelay. Besides, the present invention further discloses a device of flow control for reducing RLC layer data retransmission. The method and device of flow control for reducing RLC (Radio Link Control) layer data retransmission are able to reduce unnecessary data retransmission, greatly reduce the number of occurrence of the RLC layer out-of-order problem, improve the download performance and greatly lift the user experience.

Description

A kind of flow control method reducing the re-transmission of wireless spread-spectrum technology rlc layer data and device
Technical field
The present invention relates to wireless communication field, one reduces flow control methods and the device that wireless spread-spectrum technology RLC (RadioLinkControl, wireless spread-spectrum technology) layer data retransmits especially.
Background technology
At 3GPP (the3rdGenerationPartnerProject, third generation partner program) in agreement, RNC (RadioNetworkController, radio network controller) send UE (UserEquipment to NodeB (base station) periodically by fixing frame format, subscriber equipment) capability requests frame, after NodeB receives capability requests frame, the capability distribution frame of a set form can be returned immediately, handling capacity distribution frame, next RNC is known that needs to send great data volume within a certain period of time to this UE.Issue the ability distribution frame sign of RNC namely to flow the size of control and just determine UE download performance under wireless environment at that time, simultaneously because the bandwidth resources of RNC to NodeB are fixing, other user performance of community at UE place can be impacted so the size of stream control is likely to.And flow control algorithm is different possibly for each equipment commercial city, current industry main flow is the flow control algorithm adopting tubbiness, this algorithm supposes that the UE data buffer area of NodeB is a bucket, from the RNC data buffer storage given bucket, how much controls RNC according to the data of dress in bucket and issues speed.And this flow control algorithm seems excessively extensive, possibility can meet the point-to-point transmission requirement of current NodeB to UE reluctantly, but in the technology for R11 agreement and follow-up evolution, by it is possible that there is multiple NodeB to send the scene of data to same UE simultaneously, if at this moment also adopting extensive style stream control, then may pile up due to NodeB data volume and too much cause that RLC (RadioLinkControl, wireless spread-spectrum technology) layer is out of order, finally cause hydraulic performance decline.
Summary of the invention
The present invention proposes a kind of stream prosecutor case reducing the re-transmission of wireless spread-spectrum technology rlc layer data, solves flow-control coarse, decreases unnecessary data transmission and retransmits, greatly reduces the out of order problem of rlc layer simultaneously and occur.
First aspect, the present invention proposes a kind of method reducing the re-transmission of wireless spread-spectrum technology rlc layer data.
First, it is determined that the time period residing for user equipment (UE) downlink service data buffer memory Tdelay average time；
Preferably, before judging the time period residing for user equipment (UE) downlink service data buffer memory Tdelay average time, NodeB record described Tdelay, and pre-set three time periods according to downstream data traffic performance, respectively:
Time period one: described Tdelay, less than ideal time section minima, at this time thinks that the factor fluctuations such as wireless environment may result in UE buffer data size and cause descending performance issue not；
Preferably, Tdelay is [0,60ms]；
Time period two: described Tdelay falls between ideal in section；
Preferably, Tdelay is [60ms, 100ms]；
Time period three: described Tdelay, more than ideal time section maximum, at this time just illustrates that the data volume of NodeB buffer memory is too much, it is possible to rlc layer can be caused out of order, affect Consumer's Experience；
Preferably, Tdelay is [100ms,～].
Secondly, according to the residing time, adjust flow-control according to pre-defined rule.
Preferably, pre-defined rule adjustment flow-control includes determining initial flow control Viub according to radio interface rate Vuu in the scheduled time and described Tdelay.
Preferably, according to the different time, initial flow control Viub calculates according to following formula and obtains:
Time period one: according to formula Y=K1X+a1Trying to achieve initial flow control Viub, wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K1It is the slope corresponding with the time period one, a1It is the constant corresponding with the time period one；
Time period two: according to formula Y=K2X+a2Trying to achieve initial flow control Viub, wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K2It is the slope corresponding with the time period two, a2It it is time period two corresponding constant；
Time period three: according to formula Y=K3X+a3Trying to achieve initial flow control Viub, wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K3It is the slope corresponding with the time period three, a3What the time period three was corresponding is constant.
Second aspect, the present invention provides a kind of and reduces the flow control apparatus that rlc layer retransmits, including:
Judge module, it is judged that the time period residing for UE downlink service data buffer memory Tdelay average time；
Adjusting module, according to the residing time period, adjusts flow-control according to pre-defined rule.
Preferably, described judge module also includes arranging module, pre-sets respectively time period one three time periods, described Tdelay less than ideal time section minima according to downstream data traffic performance；Time period two, described Tdelay fall into ideal time section；Time three, described Tdelay are more than ideal time section maximum.
Logging modle, records described Tdelay, judges the time period residing for data buffer storage Tdelay average time for judge module.
Preferably, the time period included residing for radio interface rate Vuu in the setting time and described Tdelay according to pre-defined rule adjustment flow-control determines initial flow control Viub.
Preferably, initial flow control Viub calculates according to following formula and obtains:
Time period one: according to formula Y=K1X+a1Trying to achieve initial flow control Viub, wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K1It is the slope corresponding with the time period one, a1It it is time period one corresponding constant；
Time period two: according to formula Y=K2X+a2Trying to achieve initial flow control Viub, wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K2It is the slope corresponding with the time period two, a2It it is time period two corresponding constant；
Time period three: according to formula Y=K3X+a3Trying to achieve initial flow control Viub, wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K3It is the slope corresponding with the time period three, a3It it is time period three corresponding constant.
The present invention is adjusted by this stream control that becomes more meticulous, and namely saves broadband resource, decreases the transmission of unnecessary data and retransmits, greatly reduce the out of order problem of rlc layer simultaneously and occur, improve download performance, the significant increase user experience of user.
Figure of description
In order to be illustrated more clearly that the embodiment of the present invention or existing technical scheme in the art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below.
Fig. 1 is that the present invention is a kind of reduces the flow control method schematic diagram that wireless spread-spectrum technology rlc layer data retransmit；
Fig. 2 is the flow chart of the embodiment of the present invention；
Fig. 3 is that a kind of of the present invention reduces the flow control apparatus schematic diagram that wireless spread-spectrum technology rlc layer data retransmit；
Fig. 4 is that a kind of of the present invention reduces the functional arrangement flowing control dress stream control adjustment that wireless spread-spectrum technology rlc layer data retransmit.
Detailed description of the invention
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail.Should be appreciated that preferred embodiment described below is merely to illustrate and explains the present invention, be not intended to limit the present invention
Being the method schematic diagram of the present invention shown in Fig. 1, the method comprises the following steps: first, it is determined that the time period residing for UE downlink service data buffer memory average time；Secondly, according to the residing time period, adjust flow-control according to pre-defined rule.
Fig. 2 is the schematic flow sheet of the embodiment of the present invention: as it can be seen,
S201: persistently to being sent to the packet of UE at the NodeB radio interface rate Vuu being recorded and counting in the scheduled time；
S202: continued to remember the average time of data buffer storage by base station, judge the time period residing for data buffer storage average time according to data buffer storage Tdelay average time, respectively data buffer storage average time fall into ideal time section, data buffer storage average time average time more than ideal time section maximum less than ideal time section minima, data buffer storage；
S203: residing for described Tdelay be the time period one if judging, according to formula Y=K1X+a1Trying to achieve initial flow control Viub, wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K1It is slope, a1It it is time period one corresponding constant；
S204: residing for described Tdelay be the time period two if judging, according to formula Y=K2X+a2Trying to achieve initial flow control Viub, wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K2It is slope, a2It it is time period two corresponding constant；
S205: residing for described Tdelay be the time period three if judging, according to formula Y=K3X+a3Trying to achieve initial flow control Viub, wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K3It is slope, a3It it is time period three corresponding constant；
S206: calculate Viub, and notify RNC in the way of ability distribution is auspicious.Handling capacity distribution frame, next RNC is known that needs to send great data volume within a certain period of time to this UE；
S207: this flow control terminates.
Fig. 3 is assembly of the invention schematic diagram.As it can be seen, this device includes four modules.First it is that module is set, pre-sets multiple time period according to the performance of downstream data traffic；Next to that logging modle, record data buffer storage Tdelay average time；Have is judge module again, it is judged that the time residing for UE downlink service data buffer memory average time；It is finally adjusting module, according to the residing time, adjusts flow-control according to pre-defined rule.
Fig. 4 is that the functional schema that stream control adjusts is intended to, suppose that vertical coordinate Viub/Vuu*100 is y as shown in Figure 4, abscissa Tdelay is x, and the slope of each oblique line is k, then three parameters relationships of these 3 times can be converted into y=kx+a (constant) and carry out self-adaptative adjustment.Self-adaptative adjustment is by judging that the data buffer storage at Tdelay place triggers and carries out the adjustment of initial flow control Viub average time.When UE needs to obtain downlink service data, its data flow is from download server → RNC (RadioNetworkController, radio network controller) → NodeB (base station) → UE, the data traffic size of this link is mainly controlled by NodeB scheduler.When UE accesses network and proceeds by PS (data service) business, HSDPA (HighSpeedDownlinkPacketAccess, high-speed slender body theory) scheduler wireless channel environment residing for the ability level of UE, UE, the community residing for UE Radio Resource situation etc. estimate at this time downstream rate between NodeB to UE, this downstream rate is commonly referred to radio interface rate Vuu.Scheduler determines the speed size Viub of RNC to NodeB, i.e. initial flow control according to this speed, can be 1.5～2 times of Vuu to ensure that UE has enough data distributings, initial flow rate controlling rate to be greater than Vuu, Viub.This speed is distributed frame as initial ability and is told RNC by NodeB.The essence of stream control is for the Vuu in nearest a period of time of UE in fact, controls the Viub in following a period of time.So, this technology is mainly according to nearest Vuu, and UE data dynamically adjust Viub size the average time of buffer memory within the NodeB most a recent period of time.
Described above illustrate and describes a preferred embodiment of the present invention, but as previously mentioned, it is to be understood that the present invention is not limited to form disclosed herein, it is not to be taken as the eliminating to other embodiments, and can be used for other combinations various, amendment and environment, and in invention contemplated scope described herein, can be modified by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change are without departing from the spirit and scope of the present invention, then all should in the protection domain of claims of the present invention.

Claims (9)

1. one kind is reduced the flow control method that wireless spread-spectrum technology rlc layer data retransmit, it is characterised in that described method includes:
Judge the time period residing for user equipment (UE) downlink service data buffer memory Tdelay average time；
According to the residing time period, adjust flow-control according to pre-defined rule.
2. the method for claim 1, it is characterised in that before judging the time period residing for UE downlink service data buffer memory Tdelay average time, described method also includes:
Performance according to downstream data traffic pre-sets multiple time period；
Record described Tdelay.
3. method as claimed in claim 1 or 2, it is characterised in that the time period residing for described judgement UE downlink service data buffer memory Tdelay average time includes: time period one, described Tdelay are less than ideal time section minima；Time period two, described Tdelay fall into ideal time section；Time period three, described Tdelay are more than ideal time section maximum.
4. the method for claim 1, it is characterised in that the described time period included residing for radio interface rate Vuu in the scheduled time and described Tdelay according to pre-defined rule adjustment flow-control determines initial flow control Viub.
5. method as claimed in claim 4, it is characterised in that described each time period initial flow control Viub calculates according to following formula and obtains:
Time period one: according to formula Y=K1X+a1 tries to achieve initial flow control Viub, and wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K1Being the slope corresponding with the time period one, a1 is the constant corresponding with the time period one；
Time period two: according to formula Y=K2X+a2 tries to achieve initial flow control Viub, wherein Y2Viub/Vuu, Vuu radio interface rate, Viub initial flow control, X is Tdelay, K2Being the slope corresponding with the time period two, a2 is the constant corresponding with the time period two；
Time period three: according to formula Y=K3X+a3 tries to achieve initial flow control Viub, and wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K3Being the slope corresponding with the time period three, what a3 was corresponding with the time period three is constant.
6. one kind is reduced the flow control apparatus that wireless spread-spectrum technology rlc layer data retransmit, it is characterised in that described device includes:
Judge module, it is judged that the time period residing for user equipment (UE) downlink service data buffer memory Tdelay average time；
Adjusting module, according to the residing time period, adjusts flow-control according to pre-defined rule.
7. device as claimed in claim 6, it is characterised in that described judgment means also includes:
Module is set, pre-sets multiple time period according to the performance of downstream data traffic, respectively the time period one, described Tdelay is less than ideal time section minima；Time period two, described Tdelay fall into ideal time section；Stage three, described Tdelay are more than ideal time section maximum.
Logging modle, records described Tdelay, judges the time period residing for described Tdelay for judge module.
8. device as claimed in claim 6, it is characterised in that adjusting module, according to the residing time period, the stage included residing for radio interface rate Vuu in the scheduled time and described Tdelay according to pre-defined rule adjustment flow-control determines initial flow control Viub.
9. device as claimed in claim 9, it is characterised in that described initial flow control Viub calculates according to following formula and obtains:
Time period one: according to formula Y=K1X+a1 tries to achieve initial flow control Viub, and wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K1Being slope, a1 is the constant corresponding with the time period one；
Time period two: according to formula Y=K2X+a2 tries to achieve initial flow control Viub, wherein Y2Viub/Vuu, Vuu radio interface rate, Viub initial flow control, X is Tdelay, K2Being slope, a2 is the constant corresponding with the time period two；
Time period three: according to formula Y=K3X+a3 tries to achieve initial flow control Viub, and wherein Y is Viub/Vuu, Vuu radio interface rate, and Viub initial flow control, X is Tdelay, K3Being slope, a3 is the constant corresponding with the time period three.
CN201410742260.6A 2014-12-08 2014-12-08 Method and device of flow control for reducing RLC (Radio Link Control) layer data retransmission Withdrawn CN105744568A (en)

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CN201410742260.6A CN105744568A (en) 2014-12-08 2014-12-08 Method and device of flow control for reducing RLC (Radio Link Control) layer data retransmission
PCT/CN2015/090171 WO2016090986A1 (en) 2014-12-08 2015-09-21 Traffic control method and apparatus for reducing radio link control (rlc) layer data retransmission

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CN201410742260.6A CN105744568A (en) 2014-12-08 2014-12-08 Method and device of flow control for reducing RLC (Radio Link Control) layer data retransmission

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Citations (5)

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Publication number Priority date Publication date Assignee Title
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WO2009058085A2 (en) * 2007-11-01 2009-05-07 Telefonaktiebolaget L M Ericsson (Publ) Efficient flow control in a radio network controller (rnc)
CN101489263A (en) * 2009-03-03 2009-07-22 华为技术有限公司 Data transmission controlling method, apparatus and system
CN101516109A (en) * 2008-02-21 2009-08-26 大唐移动通信设备有限公司 Method, system and device for controlling flow
CN102387540A (en) * 2010-08-30 2012-03-21 普天信息技术研究院有限公司 Flow control method of Iub port

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1937594A (en) * 2006-11-13 2007-03-28 华为技术有限公司 Method and device for allocating cache quene threshold, and its flow control method and device
WO2009058085A2 (en) * 2007-11-01 2009-05-07 Telefonaktiebolaget L M Ericsson (Publ) Efficient flow control in a radio network controller (rnc)
CN101516109A (en) * 2008-02-21 2009-08-26 大唐移动通信设备有限公司 Method, system and device for controlling flow
CN101489263A (en) * 2009-03-03 2009-07-22 华为技术有限公司 Data transmission controlling method, apparatus and system
CN102387540A (en) * 2010-08-30 2012-03-21 普天信息技术研究院有限公司 Flow control method of Iub port

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Application publication date: 20160706