CN100463378C - Channel rate adjusting method for packet data service of general mobile communication system - Google Patents
Channel rate adjusting method for packet data service of general mobile communication system Download PDFInfo
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Abstract
The invention discloses a channel rate adjustment method of moving communication system sectionalization data service, which comprises the following steps: measuring buffer area data bulk of wireless links inlay; deciding whether the buffer area data bulk is bigger than upper data threshold; adjusting the channel rate on the upper goal channel rate if the buffer area data bulk is bigger than upper data threshold; deciding whether the buffer area data bulk is smaller than downward datathreshold; adjusting the channel rate to downward goal channel rate, if the buffer area data bulk is smaller than downward datathreshold; going to check data bulk if buffer area data bulk isn't smaller than downward datathreshold. The invention reduces the signaling cost of current scheme, which improves the system resource availability.
Description
Technical field
The present invention relates to wireless communication field, particularly a kind of channel rate adjusting method of packet data service of general mobile communication system.
Background technology
At UMTS (Universal Mobile Telecommunications System, universal mobile telecommunications system) in, for example, WCDMA (Wide-band Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) (the Frequency Division Duplex of the FDD in, Frequency Division Duplexing (FDD)), 3.84McpsTDD (Time Division Duplex, time division duplex) and TD_SCDMA (Time Division SynchronousCDMA, Time Division-Synchronous Code Division Multiple Access) in, can use the data service of multiple transmission channel service packet, down direction for example, can use DCH (Dedicated Channel, dedicated channel), FACH (ForwardAccess Channel, forward access channel), DSCH (Downlink Shared Channel, DSCH Downlink Shared Channel) and HS-DSCH (High Speed DownlinkShared Channel, high speed descending sharing channel).Wherein FACH, DSCH and HS-DSCH can be shared with time division way by a plurality of users, and DCH is exclusively enjoyed by unique user.Realization situation and channel selection strategy according to system are determined the concrete channel that uses.
Because Packet Service has the burst feature, the buffer area data volume fluctuation is bigger, and when using DCH to serve for it, the channel speed of original allocation may be not suitable for continuing to use.Be assurance user's QoS (Qualityof Service, quality of service), and improve resource utilization ratio, generally speaking,, need the rise channel speed when buffer area data volume becomes for a long time from few; When buffer area data volume by after a little while changeable, need the downward modulation channel speed.
The method of channel speed adjustment in the prior art is: a DCH speed set R is set
S={ R
1, R
2... R
n, each speed is pressed from little arrival sequence arrangement in the set; Set simultaneously and raise data volume thresholding, downward modulation data volume thresholding, trigger regularly thresholding and retention time thresholding.If the current service speed of certain user is R
i(1≤i≤n), at first measure R LC (Radio Link Control, Radio Link control) buffer area data volume TV (TrafficVolume).When detecting the TV value greater than described rise data volume thresholding, start and trigger timer Time-to-trigger, the duration of this timer, if the TV value is less than or equal to described rise data volume thresholding, then Time-to-trigger stops timing, and zero clearing; Exceed the triggering time gate in limited time when the time of Time-to-trigger operation, then trigger speed and raise request; Start retention time timer Pending-time-after-trigger simultaneously, be no more than described retention time running time during thresholding, trigger the condition that speed raises, also do not report even satisfy once more at Pending-time-after-trigger; Surpass described retention time during thresholding when Pending-time-after-trigger running time, Pending-time-after-trigger stops timing, and zero clearing.
The process that speed is reduced and the process of rise are similar, when detecting the TV value less than downward modulation data volume thresholding, start and trigger timer Time-to-trigger, if Time-to-trigger exceeds regularly thresholding of triggering running time, then trigger the speed downward modulation; Start retention time timer Pending-time-after-trigger simultaneously, when exceeding the retention time running time, Pending-time-after-trigger stops timing and zero clearing during thresholding, otherwise,, do not report even satisfy the condition that triggers the speed downward modulation once more yet.The main effect of Pending-time-after-trigger is that restriction reports number of times, reduces signaling consumption.
Need explanation, work as R
i=R
nThe time, system does not carry out speed and raises, and works as R
i=R
1The time, system does not carry out the speed downward modulation.Time-to-trigger and the Pending-time-after-trigger that reduces that be in harmonious proportion on the speed can establish different timing thresholdings.
Prior art is passed through a data volume thresholding, two regularly adjustment of the common control channel speed of thresholding.Generally determine the reasonable value of three thresholdings by Computer Simulation.Because three thresholdings have multiple compound mode, feasible search more complicated and the difficulty of optimizing threshold value.
In addition, when existing scheme is carried out the speed adjustment, generally only limit at set R
SIn carry out between adjacent speed, when buffer area data volume increases sharply, often carry out repeatedly speed continuously and raise, because the speed adjustment process has a fixed response time, increase signaling consumption on the one hand, also limited the improvement of Packet Service throughput and delay performance on the other hand.And this time delay is generally a hundreds of millisecond, and data quantity transmitted be can not ignore during this.
Summary of the invention
The problem to be solved in the present invention provides a kind of channel rate adjusting method of packet data service of general mobile communication system, and prior art speed is adjusted complexity and speed is adjusted the big defective of time delay to overcome:
For addressing the above problem, the invention provides a kind of channel rate adjusting method of packet data service of general mobile communication system, comprising:
A, measurement radio link layer buffer area data volume;
B, judge that whether described buffer area data volume raises data threshold greater than speed, if then change step C, otherwise change step D;
C, channel speed directly adjusted to raise destination channel speed, flow process finishes;
D, judge described buffer area data volume whether less than speed downward modulation data threshold, if then change step e, otherwise change steps A;
E, channel speed directly or is step by step adjusted to downward modulation destination channel speed.
Step C replaces with: start first timer, and judge whether raise destination channel selects success, if select successfully, channel speed is directly adjusted to rise destination channel speed.
Step C further comprises:
F, with the buffer area data volume classification, and the setting rise destination channel rate set corresponding with buffer area data volumes at different levels;
G, according to the buffer area data volume of described measurement, in described rise destination channel rate set, select and raise destination channel speed.
Step e replaces with: after starting second timer, channel speed directly or is step by step adjusted to downward modulation destination channel speed.Described speed raises data threshold and is determined by current channel speed, rise destination channel speed, rise channel speed time delay and rise scale factor.
Described speed downward modulation data threshold is determined by current channel speed, downward modulation channel speed time delay and downward modulation scale factor.
Described rise scale factor is greater than 0.
Judge that whether described buffer area data volume greater than the specific implementation that speed raises data threshold is: subscriber equipment judges that whether buffer area data volume is greater than speed rise data threshold; Channel speed is directly adjusted to the specific implementation that raises destination channel speed is: radio network controller (RNC) and subscriber equipment are directly adjusted to channel speed and are raised destination channel speed.
Judge that whether described buffer area data volume is that subscriber equipment judges that whether described buffer area data volume is less than speed downward modulation data threshold less than the specific implementation of speed downward modulation data threshold; The specific implementation of channel speed directly or step by step being adjusted to downward modulation destination channel speed is: RNC and subscriber equipment directly or are step by step adjusted to downward modulation destination channel speed with channel speed.
Compared with prior art, the present invention has the following advantages:
Can directly adjust to only speed when speed of the present invention is adjusted, reduce existing scheme continuously adjustable signaling consumption, improve usage factor of system resource, can improve simultaneously and adjust the deterioration of time delay service feature.Raise scale factor β by control
UpWith downward modulation scale factor β
DownValue, can between the time delay/throughput performance of signaling consumption, resource utilization and Packet Service, obtain rational compromise, and when obtaining the optimal value of thresholding by emulation, this programme can shorten the search time of optimal value.
Description of drawings
Fig. 1 is a basic principle flow chart of the present invention;
Fig. 2 is the flow chart that up direction channel speed of the present invention is adjusted.
Embodiment
Below we will be in conjunction with the accompanying drawings, optimum implementation of the present invention is described in detail.At first it is to be noted, the implication of the term of using among the present invention, words and claim can not only only limit to its literal and common implication and go to understand, also comprise the implication and the notion that into conform to technology of the present invention, this is because we are as the inventor, to suitably provide the definition of term, so that the most appropriate description is carried out in our invention.Therefore, the configuration that provides in this explanation and the accompanying drawing is first-selected embodiment of the present invention, rather than will enumerates all technical characteristics of the present invention.We will recognize to also have the various equivalent scheme or the modifications that can replace our scheme.
Illustrate that at first can be applied to the base station among the present invention sends the down direction of information to wireless terminal, or send the up direction of information by wireless terminal to the base station.
Basic principle of the present invention comprises as shown in Figure 1:
Step s101 measures the radio link layer buffer area data volume.Up buffer area data volume is measured and is finished and report radio network controller (RNC) by UE (subscriber equipment), and downlink data measurement amount is finished by radio network controller (RNC) (Radio Net Controller, radio network controller) inside.
Step s102 judges whether described buffer area data volume raises data threshold greater than speed, if then change step s103, otherwise change step s104.Described speed raises data threshold and can obtain by the following method: establishing the adjustment process duration (promptly raising the channel speed time delay) of raising channel speed is T
D, this value is main relevant with the disposal ability of system, can obtain by metering system; Before the adjustment of rise channel speed was finished, the user used original channel speed service; If the current channel speed that uses of user is R
i(
1≤ i≤n), and scale factor β is raised in definition
UpUse TV
Ij_upExpression is adjusted R with channel speed from Ri
j(the data volume thresholding during 1≤i＜j≤n), TV
Ij_upDetermine by formula (1):
TV
ij_up＝T
D·R
i+β
up·T
D·R
j (1)
Wherein, β
UpT
DDetermined channel speed to be adjusted into R
jAfter, the buffering area remaining data uses R
jThe minimum time that transmission needs.In the formula (1),, can use different rise scale factor β at different destination channel speed
Upβ
UpValue and professional time delay, throughput requires and expectation obtains resource utilization ratio relevant, generally speaking, β
UpValue should guarantee data volume thresholding that (1) formula calculates greater than 0, and it is high more to raise destination channel speed, it is big more that speed raises data threshold.In order to ensure still having data to need transmission behind the channel of adjusting to higher rate, advise β
UpValue greater than 0; β
UpOptimal value can obtain by emulation.
Step s103 directly adjusts to only rise destination channel speed with channel speed; Described only rise destination channel speed is determined according to the data volume in system's regulations speed ability and the buffering area.In addition, because power and/or code channel resource cause raising failure inadequately, in very short time, carry out reporting the second time there is no need; Trigger to report also in the speed adjustment process in addition and there is no need, therefore, can when triggering rise, start first timer Pending-time-after-trigger1, if the timing time of this timer is greater than the first default timing thresholding, then stop timing and zero clearing, change step s101, otherwise, new targeted rate adjustment do not triggered.Therefore, can avoid the unnecessary signaling consumption that brings that reports.Wherein generally greater than the time delay of speed adjustment process, the time delay that still is not more than the speed adjustment process is also passable for the first timing thresholding.
Whether step s104 judges described buffer area data volume less than speed downward modulation data threshold, if then change step s105, otherwise change step s101; Described speed downward modulation data threshold can obtain by the following method: setting the adjustment process duration (promptly reducing the channel speed time delay) of transferring channel speed is T
D, this value is main relevant with the disposal ability of system, can obtain by metering system; Before the adjustment of downward modulation channel speed was finished, the user used original channel speed service; If the current channel speed that uses of user is R
i(1≤i≤n), and definition downward modulation scale factor β
DownUse T
Vi, k_downExpression with channel speed from R
iBe lowered to R
k(the data volume thresholding during 1≤k＜i≤n), TV
I, k_downQu Shuai is determined by formula (2):
TV
i，k_down＝β
down·T
D·R
i (2)
Wherein, β
DownT
DDetermined timing under the triggering speed, the buffering area remaining data uses R
iThe maximum time that transmission needs.β
DownValue and professional time delay, throughput requires and expectation obtains resource utilization ratio relevant, in order to utilize current channel as far as possible fully, suggestion β
DownValue between 0,1.
Step s105, with channel speed directly or classification adjust to downward modulation destination channel speed.By the definite downward modulation data volume thresholding TV of formula (2)
I, k_downOnly relevant with current channel speed, therefore must the prior targeted rate of determining downward modulation.Usually can adopt classification (comprise step by step or bypass the immediate leadership) downward modulation or directly be lowered to minimum speed limit R
iDifferent according to type of service and feature, dual mode respectively has pluses and minuses, professional and the email business for the WWW of two-forty, because it is very short that data arrive the duration in the burst, timing or downward modulation back generally do not have new data and arrive under the speed in the short time, adopt that directly to be lowered to minimum speed limit relatively good; For the WWW business of middle low rate, following timing has new data and arrives, and employing is reduced relatively good step by step.In addition, start second timer Pending-time-after-trigger2 simultaneously adjusting to downward modulation destination channel speed, if the timing time of this timer is greater than the second default timing thresholding, then stop timing and zero clearing, change step s101, otherwise, new targeted rate adjustment do not triggered.Therefore, to avoid the unnecessary signaling consumption that brings that reports.Wherein the second timer thresholding generally greater than the time delay of speed adjustment process, also can use by the time delay that still is not more than the speed adjustment process.
The present invention is described in detail below in conjunction with execution mode, and this patent is applicable to uplink and downlink simultaneously, and different is that upstream data measurement amount is finished and reported RNC by UE, and downlink data measurement amount is finished by RNC inside.Be example with the up direction below, the concrete implementation of this programme is described, as shown in Figure 2:
Step 201: algorithm parameter initialization.Determine user's initial channel speed, last mediation downward modulation scale factor, and according to above-mentioned formula (1), (2) calculating radio link layer buffer area data volume thresholding.Determine the first timing thresholding of first timer Pending_time_after_trigger1 simultaneously.This process is finished by RNC, and by measurement control order notice UE.
Step 202:UE measures radio link layer buffer area data volume TV.
Step 203: whether detect the TV value greater than TV
I, i+1_up, i.e. the judgment data amount data volume thresholding when speed is raised one-level whether is if change step 204; If not, change step 208.
Step 204: trigger 4A, UE reports RNC with current TV value, and described 4A is an information interactive process; At current channel speed is R
i(ordinary circumstance of 1＜i＜n) is if present rate is flank speed R
n, system does not carry out speed and raises, and does not promptly respond 4A.RNC can dispose UE accordingly by measurement control order.
Step 205: after triggering 4A, start first timer Pending_time_after_trigger1;
Step 206: the TV value of utilizing UE to report, calculate and satisfy TV TV
I, j_upThe destination channel rate set.RNC therefrom selects the maximum target channel speed that can support according to system's available resources and UE ability.
Step 207:RNC judges whether present channel selects success.When system does not have resource to support any bigger transmission rate, will cause and select failure.If judged result is for being commentaries on classics step 211; Otherwise change step 212.
Whether step 208:UE detects the TV value less than TV
I, 1_down, promptly check the trigger condition that whether satisfies the speed downward modulation.If change step 209; If not, change step 202.
Step 209: trigger 4B, UE reports RNC with current buffer area data volume, and described 4B is an information interactive process; At current channel speed is R
i(ordinary circumstance of 1＜i＜n) is if present rate is minimum speed limit R
1, system does not carry out the speed downward modulation, does not promptly respond 4B.
Step 210: after triggering 4B, start second timer Pending_time_after_trigger2.
Step 211: carry out concrete speed adjustment process.This process is finished jointly by RNC and UE, relates generally to physical channel and process such as reshuffles.
Step 212: judge whether first and second timer is overtime.If, change step 213, change step 212 if not, continue to wait for and judge.
Step 213: judge that whether the user is because of total data end of transmission or other abnormal conditions end service.If not, change step 202; If change step 214.
Step 214: the user has stopped service, withdraws from this flow process.
In addition, for WWW business, the email business (and business of similar characteristics) of two-forty (more than the 128kbps), method of the present invention can be improved time delay and throughput performance.For example, for having only two stage speed R
Min, R
MaxSituation, the user uses R when initial
MinData in the above-mentioned professional burst arrived in the extremely short time, the total amount of data that the burst of representing to investigate with V arrives.From existing business model, the V value is generally bigger, can cause existing scheme and this patent scheme all to trigger the speed adjustment.If the threshold value of existing scheme 4A Time_to_trigger is T
4A, it is T that speed is adjusted time delay
D, the data transmission delay when adopting the scheme of having now is about:
Adopt the data transmission delay when of the present invention to be about:
Reduced with respect to existing scheme time delay
Owing to reduced time delay, can transmit more data within a certain period of time, therefore also improved throughput performance.
For the WWW business of low rate (16kbps is following), the data arrival process is slower, is fit to adopt the low-rate channel transmission, and two kinds of scheme performance differences are little.For the WWW business of middle speed (32kbps and 64kbps), the thresholding value correlation that whether triggers speed adjustment and data arrival process and two kinds of schemes is bigger, and performance comparison need be determined by emulation.Raise scale factor β by control
UpWith downward modulation scale factor β
DownValue.Can between the time delay/throughput performance of signaling consumption, resource utilization and Packet Service, obtain rational compromise.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (9)
1. the channel rate adjusting method of a packet data service of general mobile communication system is characterized in that, comprising:
A, measurement radio link layer buffer area data volume;
B, judge that whether described buffer area data volume raises data threshold greater than speed, if then change step C, otherwise change step D;
C, channel speed directly adjusted to raise destination channel speed, flow process finishes;
D, judge described buffer area data volume whether less than speed downward modulation data threshold, if then change step e, otherwise change steps A;
E, channel speed directly or is step by step adjusted to downward modulation destination channel speed.
2. the channel rate adjusting method of packet data service of general mobile communication system according to claim 1 is characterized in that step C replaces with:
Start first timer and judge whether raise destination channel selects success,, channel speed is directly adjusted to raised destination channel speed as if selecting successfully.
3. the channel rate adjusting method of packet data service of general mobile communication system according to claim 1 is characterized in that step C further comprises:
F, with the buffer area data volume classification, and the setting rise destination channel rate set corresponding with buffer area data volumes at different levels;
G, according to the buffer area data volume of described measurement, in described rise destination channel rate set, select and raise destination channel speed.
4. the channel rate adjusting method of packet data service of general mobile communication system according to claim 1 is characterized in that step e replaces with:
After starting second timer, channel speed directly or is step by step adjusted to downward modulation destination channel speed.
5. the channel rate adjusting method of packet data service of general mobile communication system according to claim 1, it is characterized in that described speed raises data threshold and determined by current channel speed, rise destination channel speed, rise channel speed time delay and rise scale factor.
6. the channel rate adjusting method of packet data service of general mobile communication system according to claim 1 is characterized in that, described speed downward modulation data threshold is determined by current channel speed, downward modulation channel speed time delay and downward modulation scale factor.
7. as the channel rate adjusting method of packet data service of general mobile communication system as described in the claim 5, it is characterized in that described rise scale factor is greater than 0.
8. the channel rate adjusting method of packet data service of general mobile communication system according to claim 1 is characterized in that, judges that whether described buffer area data volume greater than the specific implementation that speed raises data threshold is:
Subscriber equipment judges whether buffer area data volume raises data threshold greater than speed;
Channel speed is directly adjusted to the specific implementation that raises destination channel speed is:
Radio network controller (RNC) and subscriber equipment are directly adjusted to channel speed and are raised destination channel speed.
9. the channel rate adjusting method of packet data service of general mobile communication system according to claim 1 is characterized in that, judges that whether described buffer area data volume less than the specific implementation of speed downward modulation data threshold is:
Subscriber equipment judges that whether described buffer area data volume is less than speed downward modulation data threshold;
The specific implementation of channel speed directly or step by step being adjusted to downward modulation destination channel speed is:
RNC and subscriber equipment directly or are step by step adjusted to downward modulation destination channel speed with channel speed.
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| CN101207435B (en) * | 2006-12-18 | 2011-05-25 | 中兴通讯股份有限公司 | Method for modulating down special channel speed |
| CN101207417B (en) * | 2006-12-18 | 2012-05-23 | 中兴通讯股份有限公司 | Method for modulating up special channel speed |
| WO2010038590A1 (en) * | 2008-10-02 | 2010-04-08 | 日本電気株式会社 | Radio base station, scheduling system, allocation control method, and recording medium |
| CN101969669B (en) * | 2009-07-27 | 2013-02-13 | 电信科学技术研究院 | Method, system and device for adjusting data volume |
| CN102474896B (en) * | 2009-08-17 | 2016-06-01 | 上海贝尔股份有限公司 | The apparatus and method controlled for downlink traffic in mobile terminal, relay station and relay management equipment |
| CN102158317B (en) * | 2011-05-17 | 2013-08-21 | 中国电子科技集团公司第二十八研究所 | Delay control method of open loop narrow-band channel |
| CN103716114B (en) * | 2012-09-28 | 2018-02-23 | 华为技术有限公司 | Parameter setting method, terminal and base station in data transmission service |
| CN105813140A (en) * | 2014-12-29 | 2016-07-27 | 中兴通讯股份有限公司 | Resource allocation regulation and control method and resource allocation regulation and control device |
| CN108770023A (en) * | 2018-06-12 | 2018-11-06 | Oppo广东移动通信有限公司 | Wireless communication transmission method, device, mobile terminal and computer read/write memory medium |
| CN109614302A (en) * | 2018-11-28 | 2019-04-12 | 华为技术服务有限公司 | Service rate method of adjustment and device, relevant device |
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