CN102223210B - Method and device for adjusting block error rate - Google Patents

Abstract

The invention discloses a method for adjusting block error ratio. The method is used for realizing the adjustment on initial error block ratio, and further improves the veracity of the adjustment in a modulation coding mode. The method comprises the following steps of determining the QoS (Quality of Service) index of the current service of the user; judging whether the target initial block error rate (BLER) needs to be adjusted or not according to the determined QoS index; if so, carrying out the adjustment; and if not, keeping the current target initial BLER unchanged. The invention also discloses a device for implementing the method.

Description

A kind of method and device of adjusting Block Error Rate

Technical field

The present invention relates to the communications field, particularly relate to method and the device of adjusting Block Error Rate.

Background technology

In mobile communication system, during due to wireless fading channel, become, rapid fading can reach tens tens dB even in short-term, makes to exist in whole wireless communication procedure a large amount of uncertainties.For addressing this problem, and consider throughput and the reliability of system, in wireless communication system, introduced Adaptive Modulation and Coding technology (AMC, Adaptive Modulation Coding), its basic principle be according to the instantaneous state information self-adapting of channel change modulation coding mode (MCS, Modulation and Coding Scheme), thus under different channel statuss, obtain best throughput.In current AMC scheme, to set one or several fixing Initial Block Error Rate (BLER according to system emulation or the network planning or Optimization Experience mostly, block error ratio), then according to UE (User ' s Equipment, subscriber equipment), under current channel condition, for reaching the initial BLER of this UE, require the spectrum efficiency that can support to carry out adaptive selection MCS grade.

In prior art, the initial BLER of target is changeless.Present inventor finds, in this AMC mechanism, because receiving terminal channel conditions constantly changes, therefore the MCS grade that the channel information obtaining according to feedback or the base station measurement of UE and the initial BLER of target of setting select can not be completely and the channel conditions while carrying out transfer of data match, therefore, there will be actual while carrying out data receiver the Initial Block Error Rate of receiving terminal be not equal to the situation of the initial BLER of target of setting.If still select MCS grade according to the initial BLER of target, the MCS grade of selecting is not mated with current channel conditions, will affect data transmission quality or efficiency.

Summary of the invention

The embodiment of the present invention provides a kind of method and device of adjusting Block Error Rate, for realizing the adjustment to Initial Block Error Rate, and then improves the accuracy that modulation coding mode regulates.

A method of adjusting Block Error Rate, comprises the following steps:

Determine the service quality QoS index of user's current business;

According to definite QoS index, judge whether to need adjustment aim Initial Block Error Rate BLER, if so, adjust, otherwise keep the initial BLER of current goal constant.

For adjusting a device for Block Error Rate, comprising:

Measurement module, for determining the service quality QoS index of user's current business;

Adjusting module, for judging whether to need adjustment aim Initial Block Error Rate BLER according to definite QoS index, if so, adjusts, otherwise keeps the initial BLER of current goal constant.

The embodiment of the present invention, by the initial BLER of adjustment aim, selects more accurately MCS grade, thereby improves data transmission quality or efficiency.

Accompanying drawing explanation

Fig. 1 is the main method flow chart of adjusting Block Error Rate in the embodiment of the present invention;

Fig. 2 determines the method flow diagram of the time delay of eating dishes without rice or wine in the embodiment of the present invention;

Fig. 3 determines the method flow diagram of the packet loss of eating dishes without rice or wine in the embodiment of the present invention;

Fig. 4 is the initialized method flow diagram of the initial BLER of target in the embodiment of the present invention;

Fig. 5 is the structure chart installing in the embodiment of the present invention.

Embodiment

The embodiment of the present invention, by the initial BLER of adjustment aim, selects more accurately MCS grade, thereby improves data transmission quality or efficiency.

Referring to Fig. 1, the main method flow process of adjusting Block Error Rate in the present embodiment is as follows:

Step 101: service quality (QoS) index of determining user's current business.

Step 102: judge whether to need adjustment aim Initial Block Error Rate BLER according to definite QoS index, if so, adjust, otherwise keep the initial BLER of current goal constant.

In the present embodiment, QoS index comprises several factors, as comprised, eat dishes without rice or wine packet loss and the time delay of eating dishes without rice or wine.Packet loss and the time delay of eating dishes without rice or wine of eating dishes without rice or wine can be got instantaneous value, or average (or smooth value).Paper is determined the process of eat dishes without rice or wine packet loss and the time delay of eating dishes without rice or wine of user's current business below.

Referring to Fig. 2, in the present embodiment, determine that the method flow of the time delay of eating dishes without rice or wine is as follows:

Setting timing statistics window is T1, the actual transmissions time delay coboundary that the Data Radio Bearer of take is eated dishes without rice or wine in statistics a period of time as unit, and calculate its average delay.

Step 201: the actual propagation delay time of eating dishes without rice or wine in statistics T1 duration.Preferably, from the T1 duration apart from current time, start statistics.For the packet of correct reception, the RLC that makes a start (wireless link control) layer is the actual propagation delay time of eating dishes without rice or wine to the time delay of receiving end rlc layer; For the overtime packet of making a start, its time delay of eating dishes without rice or wine is according to the maximum allowable delay statistics of eating dishes without rice or wine; For the overtime packet of receiving terminal, according to the time delay of eating dishes without rice or wine of its reality, add up.

Step 202: the upper bound of determining the actual time delay of eating dishes without rice or wine.Concrete, all time delay values of eating dishes without rice or wine that obtain are sorted from small to large, form CDF (Cumulative Distribution Function, cumulative distribution function) curve, and the corresponding time delay of point of getting accumulated value y% (as being 95% or 98%) on this curve is as the actual coboundary reaching of the time delay of eating dishes without rice or wine in this period of time, is designated as PacketDelay _i.The present embodiment is follow-up by according to eating dishes without rice or wine the upper bound PacketDelay of actual time delay _ijudge whether to need the initial BLER of adjustment aim, make final definite initial BLER of target guarantee as far as possible the QoS demand of business, what if eated dishes without rice or wine, time delay was determined is less, affect the accuracy of the initial BLER of target, if excessive, such as getting maximum, do not there is generality, affect throughput of system.

Can also calculate the average of the actual time delay of eating dishes without rice or wine.Concrete, all statistical samples in this section of time T 1, calculate its linear average, are the average PktDelayAvg of the actual time delay of eating dishes without rice or wine _i.

Referring to Fig. 3, in the present embodiment, determine that the method flow of the packet loss of eating dishes without rice or wine is as follows:

Setting timing statistics window is T2, the actual packet loss that the Data Radio Bearer of take is eated dishes without rice or wine in the statistics T2 of unit duration.

Step 301: the packet loss of eating dishes without rice or wine in statistics T2 duration.In the T2 of time period nT2～(n+1), the packet loss η that eats dishes without rice or wine of carrying i _i(n) be: ${\mathrm{\η}}_i\left(n\right)=(1-\frac{N_{\mathrm{received}}}{N_{\mathrm{send}}+N_{\mathrm{timeout}}})\×100\%,$ Wherein, N in this period _receivedrLC SDU (Service Data Unit, the Service Data Unit) number correctly receiving for receiving terminal rlc layer reality; N _sendfor transmitting terminal in this period is at the RLC SDU number of transmission of eating dishes without rice or wine; N _timeoutfor in this period due to the congested RLC SDU number of making a start overtime causing of eating dishes without rice or wine, n is positive integer.

Step 302: the packet loss of eating dishes without rice or wine obtaining is carried out smoothly to the packet loss of eating dishes without rice or wine after obtaining smoothly.Concrete, pass through formula: $\left\{\begin{array}{c}{\mathrm{PacketLossRatio}}_i(n+1)=(1-\mathrm{\β})\·{\mathrm{PacketLossRatio}}_i\left(n\right)+\mathrm{\β}\·{\mathrm{\η}}_i\left(n\right)\\ {\mathrm{PacketLossRatio}}_i\left(0\right)=\mathrm{\σ}\end{array}\right.$ Carry out smoothly, wherein, PacketLossRatio _i(n) for carry the level and smooth later packet loss of eating dishes without rice or wine of i at time period n, its initial value is σ; The value of σ and QCI (QoS Class Indicator, the indication of QoS grade) the wrong bag of parameter packet loss (Packet Error Loss Rate, PELR), the load level of network is relevant, for example in the initial access of this carrying constantly, according to network load level, determine that the current packet loss coefficient of eating dishes without rice or wine is x, the PELR magnitude of this carrying is 10 ^-k, σ=x10 ^-k, the magnitude of σ is identical with the magnitude of PELR; β is smoothing factor, and span is 0～1.

Determine the packet loss of eating dishes without rice or wine (level and smooth after the packet loss of eating dishes without rice or wine) and the time delay of eating dishes without rice or wine (upper bound of the actual time delay of eating dishes without rice or wine) afterwards, according to the packet loss of eating dishes without rice or wine, judged whether to need adjustment aim Initial Block Error Rate BLER with the time delay of eating dishes without rice or wine.First according to eat dishes without rice or wine packet loss judgement or first according to eat dishes without rice or wine time delay judgement all can, below first to judge to illustrate the process of the initial BLER of adjustment aim according to the time delay of eating dishes without rice or wine.

First judge PacketDelay _iwhether+θ is less than PDB _Δ, wherein, PacketDelay _ifor the propagation delay time of eating dishes without rice or wine, the delay skew amount that θ is default, θ>=0 (span is 0～100ms), PDB _Δthe maximum delay allowing for eating dishes without rice or wine.What adopt due to the present embodiment is the upper bound of actual time delay of eating dishes without rice or wine, with PDB _Δin the time of relatively, there is certain side-play amount can make the actual time delay of eating dishes without rice or wine that is greater than the upper bound also can be less than PDB _Δ.And, PDB in the present embodiment _Δ=PDB-Δ _tpacket delay budget (Packet Delay Budget, PDB) packet that has defined this carrying is at UE and PCEF (Policy and Charging Enforcement Function, the coboundary of the propagation delay time allowing policy, billing enhancing functional entity), for supporting the data dispatch of link layer.Because PDB is the propagation delay time between PCEF and UE, during the maximum delay therefore considering to eat dishes without rice or wine to allow, preferably mode is the time delay between the layer 2 to PCEF of deduction base station, and the time delay between the layer 2 to PCEF of base station is designated as Δ _t(its typical value is 20ms).

If be less than, i.e. PacketDelay _i+ θ < PDB-Δ _t, judge whether the packet loss of eating dishes without rice or wine is less than packet loss and eats dishes without rice or wine to ensure target lower limit, if PacketLossRatio _i< (1-ε ₁) PktLS _{t arg et}, the initial BLER of current goal is raised to a default step delta _step(the typical value of step-length is 1% or 2%), wherein, PacketLossRatio _ifor Fig. 3 flow process is final obtain level and smooth after the packet loss of eating dishes without rice or wine, (1-ε ₁) PktLS _{t arg et}for packet loss eats dishes without rice or wine to ensure target lower limit, PktLS _{t arg et}for packet loss eats dishes without rice or wine to ensure targets threshold, ε ₁(representative value is 0.2) is default lower limit amplitude, Δ _stepand ε ₁be nonnegative real number.If PacketLossRatio _i> (1+ ε ₂) PktLS _{t arg et}, the initial BLER of current goal is lowered to m default step delta _step, m is default positive integer, span 1～5, and representative value is 2, (1+ ε ₂) PktLS _{t arg et}for packet loss eats dishes without rice or wine to ensure target first upper limit, ε ₂for the first default upper limit amplitude, its typical value is 0.1.The present embodiment is in order to guarantee as far as possible the stability of transmission quality and system, and the amplitude of downward is bigger, and the amplitude of rise is smaller.The packet loss of eating dishes without rice or wine is eated dishes without rice or wine to ensure target lower limit higher than packet loss and is less than packet loss and eats dishes without rice or wine to ensure in target first in limited time, keeps the initial BLER of current goal constant.

If be not less than, i.e. PacketDelay _i+ θ>=PDB-Δ _t, judge whether the packet loss of eating dishes without rice or wine is greater than packet loss and eats dishes without rice or wine to ensure target second upper limit, if PacketLossRatio _i> (1+ ε ₃) PktLS _{t are et}, according to default step delta _steplower the initial BLER of target, or preferably, according to packet loss eat dishes without rice or wine to ensure targets threshold, eat dishes without rice or wine average delay and the actual maximum transmission times allowing adjust the initial BLER of current goal.Concrete, pass through formula

adjust the initial BLER of current goal, wherein, BLER _{t arg et}for the initial BLER of target after adjusting, PktLS _{t arg et}for packet loss eats dishes without rice or wine to ensure targets threshold, the permission maximum transmission times summation of this configuration when p represents to configure autonomous retransmission (ARQ) and mixed automatic retransfer (HARQ), maximum transmission times when q is illustrated in the maximum delay that is no more than the permission of eating dishes without rice or wine, the minimum value in p and q represents the maximum retransmission of actual permission.If do not configure ARQ or HARQ, with q, be as the criterion, or p is made as to the value that is obviously greater than q.If PacketLossRatio _i< (1+ ε ₃) PktLS _{t arg et}, keep the initial BLER of current goal constant.

When the packet multiplexing to of a plurality of carryings transmission block, the initial BLER of current goal is the initial BLER of target of value minimum in the initial BLER of target corresponding to a plurality of carryings.

Wherein preferably, packet loss eats dishes without rice or wine to ensure that targets threshold is eat dishes without rice or wine packet loss coefficient and the wrong product that wraps packet loss (PELR), i.e. PktLS _{t arg et}=x * 10 ^-k, the x packet loss coefficient that represents to eat dishes without rice or wine, 10 ^-kfor the magnitude requirement of the PELR of current carrying, the magnitude of PELR requires to obtain by QCI index look-up table 1 corresponding to current business, and the example of a table 1 is as follows:

Table 1, standard QCI characteristic

In upper table, the implication of parameters is as follows:

Resource type (Resource Type) is used to indicate current bearer types and belongs to GBR (Guaranteed Bit Rate guarantees bit rate) or Non-GBR (non-assurance bit rate) business.

Priority (Priority) characterizes the data transmission grade of current carrying, and value is less more should first be dispatched.

Packet delay budget (Packet Delay Budget, PDB) packet that has defined this carrying is at UE and PCEF (Policy and Charging Enforcement Function, the coboundary of the propagation delay time allowing policy, billing enhancing functional entity), for supporting the data dispatch of link layer.

Wrong bag packet loss (Packet Error Loss Rate, PELR) has defined that transmitting terminal link layer is processed but receiving terminal the unsuccessful ratio coboundary that is delivered to IP (Internet Protocol, the Internet Protocol) bag on upper strata.The PELR index that it may be noted that QCI definition is only in magnitude, as in actual transmitting procedure 9 * 10 ^-2packet loss remain and meet 10 ^-2pELR require.

QoS grade indication (QCI) is QoS attribute-bit of carrying, its correspondence above-mentioned one group of QoS index request.

In above-mentioned QCI parameter, resource type is generally used for the receiving of wireless side and controls and scheduling; Priority is generally used for the processed strategy of scheduling; Packet loss is conventionally relevant to link layer configuration with time delay configuration, as determined configuration RLC (Radio Link control, wireless link control) pattern is UM (Unacknowledged Mode, without affirmation mode) or AM is (Acknowledgement Mode, affirmation mode), whether open ARQ (Automatic Repeat request, automatic repeat request) mechanism, HARQ (Hybrid ARQ, mix automatic repeat request) maximum retransmission, and the initialization of the initial BLER of target in the present embodiment and dynamically adjustment etc.

In the foundation or modification process of RB (radio bearer), the QCI sign of each carrying can be known in base station, and and then according to table 1, knows the QoS demand parameter of carrying.In this manner, when setting up or revising any RB for UE, the QoS demand of knowing all kinds of carryings that base station can both be real-time.As: when QCI grade of system access be 1 VoIP (Voice over Internet Protocol, IP speech; IP: Internet protocol) business, as shown in Table 1, its PDB is 100ms, it is 10 that packet loss requires ^-2.Because PDB is the propagation delay time between PCEF and UE, during the maximum delay therefore considering to eat dishes without rice or wine to allow, should deduct the time delay Δ between the layer 2 to PCEF of base station _t, the maximum transmitted time delay of eating dishes without rice or wine to allow is 100-Δ _tms, eats dishes without rice or wine to require the packet loss guaranteeing for being no more than 10 ^-2magnitude.

And for example: when FTP (File Transport Protocol, the file transfer protocol (FTP)) business that QCI grade of system access is 8, as shown in Table 1, its PDB is 300ms, packet loss requirement is 10 ^-6.Equally, eating dishes without rice or wine to need the maximum transmitted time delay guaranteeing is 300-Δ _tms, eats dishes without rice or wine to require the packet loss guaranteeing for being no more than 10 ^-6magnitude.

And for example, consider that the HARQ maximum transmission times of UE is p=4, a carrying that QCI grade is 3 of UE access simultaneously, its PDB=50ms, the time delay of eating dishes without rice or wine to allow is no more than 30ms, and according to eating dishes without rice or wine, maximum delay 30ms calculates; Now hypothesis through statistics obtain this be carried on for the previous period in the time delay of on average eating dishes without rice or wine of transfer of data be 15ms, in 30ms, can transmit twice at most, so q=2; Min{p now, q}=2, still supposes x=8, now the initial BLER of target is (8 * 10 ^-3) ^1/2=8.9%.

Mentioned the packet loss coefficient of eating dishes without rice or wine introducing when packet loss eats dishes without rice or wine to ensure targets threshold, the packet loss coefficient of eating dishes without rice or wine in the present embodiment is current load level index η _{pRB_ratio}function, as

tH wherein _low, TH _highfor the load thresholding of system, typical value is TH _low=0.3, TH _high=0.7.When system loading is lower, with lower PELR, ensure that target is (as 1 * 10 for the packet loss of eating dishes without rice or wine ^-k), to promote user's perception and the QoS of business; When system loading is overweight, take higher PELR as packet loss guarantee target is (as 8 * 10 ^-k), to support more number of users, larger capacity be provided.

The present embodiment provides the initial BLER of target has been carried out to the scheme of dynamically adjusting, and the prerequisite of adjustment is that the initial BLER of target exists initial value, and this initial value can rule of thumb be determined.The present embodiment is in order to make the initial BLER of target exist initial value more accurate, more meet business and QoS demand, according to the service quality rating of current business and default service quality rating and the corresponding relation of the initial BLER of target, determine that the initial BLER of target exists initial value.The initial value of the initial BLER of current goal is also determined according to one or more in the QCI grade of load level index, the packet loss coefficient of eating dishes without rice or wine, link layer configuration and carrying.

When initialization, owing to cannot obtaining the average delay of eating dishes without rice or wine, therefore with its minimum value HARQ RTT, replace; If can obtain the average delay of eating dishes without rice or wine, calculate by this parameter.The example of the initial value of the initial BLER of a kind of definite target is: PktDelayAvg _i=HARQ RTT, with this average, configures in conjunction with the RLC pattern of this carrying, the HARQ maximum transmission times that ARQ configures (whether opening ARQ function and ARQ maximum retransmission), affiliated UE the initial value that calculates the initial BLER of target.For example, suppose that this RB considers that the permission maximum transmission times summation after ARQ, HARQ is p time, and according to PktDelayAvg _i=HARQ RTT and PDB-Δ _tthe not overtime maximum transmission times of assurance that estimation obtains is q time, and the initial value of the initial BLER of target is

Referring to Fig. 4, in the present embodiment, the initialized method flow of the initial BLER of target is as follows:

Step 401: the load level index η that obtains current area _{pRB_ratio}, and determine the packet loss coefficient x that eats dishes without rice or wine.

Step 402: the HARQ maximum transmission times that is retrieved as current UE configuration.

Step 403: obtain the PELR of current carrying, and definite packet loss eats dishes without rice or wine to ensure targets threshold.

Step 404: obtain the rlc layer pattern configurations of current carrying, judge whether current data RB (radio bearer) adopts RLC AM pattern, if so, continues step 405, otherwise continue step 406.

Step 405: obtain PDB, the ARQ configuration of current carrying, and in conjunction with the HARQ maximum transmission times of UE, determine the actual maximum transmission times allowing.Wherein, it is relevant to ARQ configuration that rlc layer pattern configurations is actually, because only have RLC AM (acknowledgement Mode, affirmation mode) just can configure ARQ, other pattern can not configure ARQ.Continue step 407.

Step 406: obtain the PDB of current carrying, and in conjunction with the HARQ maximum transmission times of UE, determine the actual maximum transmission times allowing.Continue step 407.

Step 407: the maximum transmission times allowing according to reality and packet loss eat dishes without rice or wine to ensure that targets threshold determines the initial value of the initial BLER of target.

Repeat said process, until traveled through all Deta bearers of this UE.

In LTE system, the maximum transmission times of HARQ configuration Shi YiUEWei unit carries out, rather than carry out with the unit of being carried as, therefore,, in order to guarantee that the index of PDB parameter is met, need to readjust the actual maximum transmission times that can use of this carrying according to the PDB parameter of carrying.For example, the HARQ maximum transmitted of configuration UE is 4 times, and this UE has accessed a carrying that QCI grade is 3, its PDB=50ms, and the delay upper bound of eating dishes without rice or wine to allow is 50ms-Δ _t, and Δ _tnormally be more than or equal to 20ms, therefore, the maximum transmitted time delay of eating dishes without rice or wine to allow is no more than 30ms.For TDD (Time Division Duplex, time division duplex) system, the RTT of its HARQ is generally 10ms, so the HARQ the number of transmissions that this carrying can be born is 3, and the requirement that does not reach the maximum transmission times of UE configuration has just occurred the phenomenon of overtime packet loss.Therefore, in this case, should consider that its actual maximum transmission times that can allow is 3.

And for example, suppose that current system load is higher, select the coefficient of x=8, the target packet loss requirement of eating dishes without rice or wine is 8*10, because this service delay requires harsh, consider to be configured to RLC UM pattern, the initial BLER of target that this carrying can be set is 20%, can guarantee that in the scope of PDB delay requirement (HARQ the number of transmissions is no more than 3 times) reaches the packet loss requirement of eating dishes without rice or wine is 8*10 ^-3target.

By the flow process shown in Fig. 4, can obtain corresponding relation as shown in table 2.

Table 2

There is the corresponding relation shown in table 2, can, according to QCI index and packet loss coefficient x look-up table 2, directly obtain the initial value of the initial BLER of target.Table 2 should comprise the corresponding relation of the initial value of QCI index and all possible value of packet loss coefficient x and the initial BLER of target.UE index sign is used for identifying UE, and ropeway carrying-rope tendering is known for identification service.For one of a concrete UE definite business, rear 3 row in application table 2.

By above description, understood the implementation procedure of the initial BLER of adjustment aim, this process can be realized by device, below the internal structure of this device and function is introduced.

Referring to Fig. 5, in the present embodiment, for adjusting the device of Block Error Rate, comprise: measurement module 501 and adjusting module 502.

Measurement module 501 is for determining the service quality QoS index of user's current business.QoS index comprises eat dishes without rice or wine packet loss and the time delay of eating dishes without rice or wine.

Adjusting module 502, for judging whether to need adjustment aim Initial Block Error Rate BLER according to definite QoS index, is if so, adjusted, otherwise keeps the initial BLER of current goal constant.Concrete, adjusting module 502 is judged PacketDelay _i+ θ < PDB _Δ, and the packet loss of eating dishes without rice or wine is less than packet loss and eats dishes without rice or wine to ensure under target in limited time, and the initial BLER of current goal is raised to a default step-length; Wherein, PacketDelay _ifor the propagation delay time of eating dishes without rice or wine of radio bearer i, θ is default delay skew amount, θ>=0, PDB _Δthe time delay coboundary allowing for eating dishes without rice or wine.Adjusting module 502 is judged PacketDelay _i+ θ < PDB _Δ, and the packet loss of eating dishes without rice or wine is greater than packet loss and eats dishes without rice or wine to ensure in target first in limited time, the initial BLER of current goal is lowered to m default step-length, and m is default positive integer.Adjusting module 502 is judged the maximum delay that the propagation delay time of eating dishes without rice or wine is still less than the permission of eating dishes without rice or wine after raising default delay skew amount, and the packet loss of eating dishes without rice or wine eats dishes without rice or wine to ensure target lower limit higher than packet loss and be less than packet loss and eat dishes without rice or wine to ensure in target first in limited time, keep the initial BLER of current goal constant.Adjusting module 502 is judged the maximum delay that the propagation delay time of eating dishes without rice or wine is still not less than the permission of eating dishes without rice or wine after raising default delay skew amount, and the packet loss of eating dishes without rice or wine is greater than packet loss and eats dishes without rice or wine to ensure in target second in limited time, according to packet loss eat dishes without rice or wine to ensure targets threshold, eat dishes without rice or wine average delay and the actual maximum transmission times allowing adjust the initial BLER of current goal.Adjusting module 502 is judged the propagation delay time of eating dishes without rice or wine and after raising default delay skew amount, is still not less than the maximum delay that allows of eating dishes without rice or wine, and the packet loss of eating dishes without rice or wine is not more than packet loss and eats dishes without rice or wine to ensure in target second in limited time, keeps the initial BLER of current goal constant.

The maximum delay of preferably, eating dishes without rice or wine to allow is the poor of packet delay budget and network side time delay.

Adjusting module 502 passes through formula ${\mathrm{BLER}}_{t\arg \mathrm{et}}={\left({\mathrm{PktLS}}_{t\arg \mathrm{et}}\right)}^{\frac{1}{\min \{p,q\}}}$ Adjust the initial BLER of current goal, wherein, BLER _{t arg et}for the initial BLER of target after adjusting, PktLS _{t arg et}for packet loss eats dishes without rice or wine to ensure targets threshold, the permission maximum transmission times summation of this configuration when p represents to configure autonomous retransmission ARQ and mixed automatic retransfer HARQ, maximum transmission times when q is illustrated in the maximum delay that is no more than the permission of eating dishes without rice or wine, the minimum value in p and q represents the maximum retransmission of actual permission.Packet loss eats dishes without rice or wine to ensure that targets threshold is eat dishes without rice or wine packet loss coefficient and the wrong product that wraps packet loss PELR, and the packet loss coefficient of wherein eating dishes without rice or wine is the function of current load level index.

The initial value of the initial BLER of current goal is to determine according to the corresponding relation of the service quality rating of current business and default service quality rating and the initial BLER of target.

The initial value of the initial BLER of current goal is also determined according to one or more in the QCI grade of load level index, the packet loss coefficient of eating dishes without rice or wine, link layer configuration and carrying.When the packet multiplexing to of a plurality of carryings transmission block, the initial BLER of current goal is the initial BLER of target of value minimum in the initial BLER of target corresponding to a plurality of carryings.

The embodiment of the present invention, by the initial BLER of adjustment aim, selects more accurately MCS grade, thereby improves data transmission quality or efficiency.The embodiment of the present invention is mainly by packet loss and the initial BLER of time delay adjustment aim that eats dishes without rice or wine of eating dishes without rice or wine, to expect to obtain the initial BLER of most suitable target.And the embodiment of the present invention also limits the Rule of judgment of eat dishes without rice or wine packet loss and the time delay of eating dishes without rice or wine, to improve the accuracy of judgement.In order further to improve data transmission quality or efficiency, the embodiment of the present invention also provides the scheme of the initial BLER initial value of definite target, to obtain the initial BLER of target more accurately.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect completely.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code one or more.

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction of carrying out by the processor of computer or other programmable data processing device is produced for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame on computer or other programmable devices.

Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims (16)

1. a method of adjusting Block Error Rate, is characterized in that, comprises the following steps:

Determine the service quality QoS index of user's current business;

Judge PacketDelay _i+ θ < PDB _Δ, and the packet loss of eating dishes without rice or wine is less than packet loss and eats dishes without rice or wine to ensure under target in limited time, and the initial BLER of current goal is raised to a default step-length; Wherein, PacketDelay _ifor the propagation delay time of eating dishes without rice or wine of radio bearer, θ is default delay skew amount, θ>=0, PDB _Δthe time delay coboundary allowing for eating dishes without rice or wine;

Judge PacketDelay _i+ θ < PDB _Δ, and the packet loss of eating dishes without rice or wine is greater than packet loss and eats dishes without rice or wine to ensure in target first in limited time, the initial BLER of current goal is lowered to m default step-length, and m is default positive integer;

Judge PacketDelay _i+ θ < PDB _Δ, and the packet loss of eating dishes without rice or wine eats dishes without rice or wine to ensure target lower limit higher than packet loss and is less than packet loss and eat dishes without rice or wine to ensure in target first in limited time, keeps the initial BLER of current goal constant;

Judge PacketDelay _i+ θ>=PDB _Δ, and the packet loss of eating dishes without rice or wine is greater than packet loss and eats dishes without rice or wine to ensure in target second in limited time, according to packet loss eat dishes without rice or wine to ensure targets threshold, eat dishes without rice or wine average delay and the actual maximum transmission times allowing adjust the initial BLER of current goal;

Judge PacketDelay _i+ θ>=PDB _Δ, and the packet loss of eating dishes without rice or wine is not more than packet loss and eats dishes without rice or wine to ensure in target second in limited time, keeps the initial BLER of current goal constant.

2. the method for claim 1, is characterized in that, QoS index comprises eat dishes without rice or wine packet loss and the time delay of eating dishes without rice or wine.

3. the method for claim 1, is characterized in that, the maximum delay of eating dishes without rice or wine to allow is the poor of packet delay budget and network side time delay.

4. the method for claim 1, is characterized in that, comprises: pass through formula according to the step that packet loss eats dishes without rice or wine to ensure targets threshold, the maximum transmission times of eat dishes without rice or wine average delay and actual permission is adjusted the initial BLER of current goal adjust the initial BLER of current goal, wherein, BLER _targetfor the initial BLER of target after adjusting, PktLS _targetfor packet loss eats dishes without rice or wine to ensure targets threshold, the permission maximum transmission times summation of this configuration when p represents to configure autonomous retransmission ARQ and mixed automatic retransfer HARQ, maximum transmission times when q is illustrated in the maximum delay that is no more than the permission of eating dishes without rice or wine, the minimum value in p and q represents the maximum transmission times of actual permission.

5. method as claimed in claim 4, is characterized in that, packet loss eats dishes without rice or wine to ensure that targets threshold is eat dishes without rice or wine packet loss coefficient and the wrong product that wraps packet loss PELR, and the packet loss coefficient of wherein eating dishes without rice or wine is the function of current load level index.

6. the method for claim 1, is characterized in that, the initial value of the initial BLER of current goal is to determine according to the corresponding relation of the service quality rating of current business and default service quality rating and the initial BLER of target.

7. method as claimed in claim 6, is characterized in that, the initial value of the initial BLER of current goal is also determined according to one or more in the QCI grade of load level index, the packet loss coefficient of eating dishes without rice or wine, link layer configuration and carrying.

8. the method for claim 1, is characterized in that, when the packet multiplexing to of a plurality of carryings transmission block, the initial BLER of current goal is the initial BLER of target of value minimum in the initial BLER of target corresponding to a plurality of carryings.

9. for adjusting a device for Block Error Rate, it is characterized in that, comprising:

Measurement module, for determining the service quality QoS index of user's current business;

Adjusting module, for judging PacketDelay _i+ θ < PDB _Δ, and the packet loss of eating dishes without rice or wine is less than packet loss and eats dishes without rice or wine to ensure under target in limited time, and the initial BLER of current goal is raised to a default step-length; Wherein, PacketDelay _ifor the propagation delay time of eating dishes without rice or wine of radio bearer, θ is default delay skew amount, θ>=0, PDB _Δthe time delay coboundary allowing for eating dishes without rice or wine;

Judge PacketDelay _i+ θ < PDB _Δ, and the packet loss of eating dishes without rice or wine is greater than packet loss and eats dishes without rice or wine to ensure in target first in limited time, the initial BLER of current goal is lowered to m default step-length, and m is default positive integer;

Judge PacketDelay _i+ θ < PDB _Δ, and the packet loss of eating dishes without rice or wine eats dishes without rice or wine to ensure target lower limit higher than packet loss and is less than packet loss and eat dishes without rice or wine to ensure in target first in limited time, keeps the initial BLER of current goal constant;

Judge PacketDelay _i+ θ>=PDB _Δ, and the packet loss of eating dishes without rice or wine is greater than packet loss and eats dishes without rice or wine to ensure in target second in limited time, according to packet loss eat dishes without rice or wine to ensure targets threshold, eat dishes without rice or wine average delay and the actual maximum transmission times allowing adjust the initial BLER of current goal;

Judge PacketDelay _i+ θ>=PDB _Δ, and the packet loss of eating dishes without rice or wine is not more than packet loss and eats dishes without rice or wine to ensure in target second in limited time, keeps the initial BLER of current goal constant.

10. device as claimed in claim 9, is characterized in that, QoS index comprises eat dishes without rice or wine packet loss and the time delay of eating dishes without rice or wine.

11. devices as claimed in claim 9, is characterized in that, the maximum delay of eating dishes without rice or wine to allow is the poor of packet delay budget and network side time delay.

12. devices as claimed in claim 9, is characterized in that, according to packet loss eat dishes without rice or wine to ensure targets threshold, eat dishes without rice or wine average delay and the actual maximum transmission times allowing adjust the initial BLER of current goal and comprise: adjusting module passes through formula

adjust the initial BLER of current goal, wherein, BLER _targetfor the initial BLER of target after adjusting, PktLS _targetfor packet loss eats dishes without rice or wine to ensure targets threshold, the permission maximum transmission times summation of this configuration when p represents to configure autonomous retransmission ARQ and mixed automatic retransfer HARQ, maximum transmission times when q is illustrated in the maximum delay that is no more than the permission of eating dishes without rice or wine, the minimum value in p and q represents the maximum transmission times of actual permission.

13. devices as claimed in claim 12, is characterized in that, packet loss eats dishes without rice or wine to ensure that targets threshold is eat dishes without rice or wine packet loss coefficient and the wrong product that wraps packet loss PELR, and the packet loss coefficient of wherein eating dishes without rice or wine is the function of current load level index.

14. devices as claimed in claim 9, is characterized in that, the initial value of the initial BLER of current goal is to determine according to the corresponding relation of the service quality rating of current business and default service quality rating and the initial BLER of target.

15. devices as claimed in claim 14, is characterized in that, the initial value of the initial BLER of current goal is also determined according to one or more in the QCI grade of load level index, the packet loss coefficient of eating dishes without rice or wine, link layer configuration and carrying.

16. devices as claimed in claim 9, is characterized in that, when the packet multiplexing to of a plurality of carryings transmission block, the initial BLER of current goal is the initial BLER of target of value minimum in the initial BLER of target corresponding to a plurality of carryings.

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