CN1780169A - Method for adjusting transmissive signalling power of re-transmissive request system automatically - Google Patents
Method for adjusting transmissive signalling power of re-transmissive request system automatically Download PDFInfo
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Abstract
A method for regulating the signal emitting power of automatic retransmission request (ARQ) system includes such steps as configuring the working interval of retransmission probability, retransmission probability satistic by base station in each transmission interval, sending power regulating command to mobile station, and regulating the emitting power of up channel.
Description
Technical field
The present invention relates to communication technical field, be specifically related to the method for the automatic repeat requests of a kind of adjustment system transmit signal power.
Background technology
In data communication system, normal ARQ (repeat requests automatically) technology that adopts is carried out error control, this technology adds certain redundancy ratio special envoy in the information of emission it has certain error detecing capability, carry out error detection at receiving terminal to received signal according to the rule of correspondence, and the error detection result is formed answer signal feed back to transmitting terminal, transmitting terminal thinks have that group information of mistake to retransmit according to answer signal with receiving terminal, till code character does not have error code.The code character that sends if make a start has the ability of error correction and error detection simultaneously, then is called HAQR (mixing automatic repeat requests).
At present, WCDMA (Wideband Code Division Multiple Access (WCDMA)) system covers and the contradiction of capacity in order to solve better, eliminate and disturb, the elevator system capacity, satisfy the customer service demand, in the follow-up developments of WCDMA, produced many new technologies, such as, HSDPA (high speed downlink packet access) and EUL (up enhancing) technology.In HSDPA and EUL with HARQ as one of its key technology.
In the WCDMA ascending reinforcement system, increased and be used to carry the DPCH E-DPDCH (ascending reinforced special channel) that sends data message, the power setting of this channel and DPCCH (up Dedicated Control Channel) interchannel has a biasing, be the ratio of the transmitting power of the transmitting power of E-DPDCH and DPCCH, this biasing is relevant with the transformat that E-DPDCH adopts, and the transmitting power of E-DPDCH need be determined according to this bias.Usually, being provided with of this power bias need be along with the variation of channel condition is revised.
In up enhancement techniques, owing to consider the forward compatibility of version, up enhancing channel still can adopt traditional power control techniques.Power control is the key technology of cdma system, and main purpose is to overcome near-far interference, reduction average transmit power, reduces to disturb between system with in the system.Along with the variation of channel condition, according to quality objective, normally the BLER of Traffic Channel (Block Error Rate) adjusts the target signal to noise ratio value that inner-loop power control uses at a slow speed by the recipient.Actual signal to noise ratio and target signal to noise ratio that the while recipient measures the data of reception compare, and indicate transmit leg to regulate in view of the above fast and send signal power, guarantee that snr of received signal converges to the desired value that outer shroud is provided with.In EUL, outer shroud mainly is to adjust by the quality objective of E-DPDCH, and interior ring mainly carries out rapid adjustment based on the measurement SIR (signal to noise ratio) of DPCCH.Because the performance of outer shroud and interior ring assurance mechanism all is based on dedicated channel, the performance that strengthens dedicated channel can only guarantee by suitable power bias.
Usually, the correction of this power bias is mainly undertaken by RNC (radio network controller), be that NodeB (base station) reports the Trch BLER (transmission block Block Error Rate) of E-DPDCH, just passes metrical informations such as BLER and the number of transmissions to RNC according to the demodulation result of up E-DPDCH, RNC determines new power bias amount with reference to these metrical informations, and notice Node B and UE (travelling carriage).UE is known this power bias and is determined the transmitting power of E-DPDCH according to it from RNC.This correcting mode to power bias needs RNC to participate in, and owing to need determine that make that the time delay of metrical information is bigger, accuracy is low by the metrical information of NodeB, and realize complicated.
Summary of the invention
The purpose of this invention is to provide a kind of method of adjusting automatic repeat requests system transmit signal power, by RNC power bias is revised the shortcoming that accuracy is low, realize complexity to overcome in the prior art, the accuracy of raising system transmit signal power makes system obtain best throughput of system.
For this reason, the invention provides following technical scheme:
A kind of method of adjusting automatic repeat requests system transmit signal power, described system comprises radio network controller, base station and travelling carriage, described method comprises:
The operation interval of A, configuration retransmission probability;
B, carry out retransmission probability statistics by described base station at each Transmission Time Interval by predetermined way;
C, issue power adjustment commands to described travelling carriage according to the operation interval and the described retransmission probability statistical value of described retransmission probability;
D, described travelling carriage are according to the up enhancing channel transmitting power of described power adjustment commands correction.
Described steps A is specially:
Set the operation interval of described retransmission probability;
By described radio network controller the operation interval of the retransmission probability of described setting is sent to described base station.
Described predetermined way comprises:
Retransmission probability in the statistics scheduled time; And/or
Statistics sends the retransmission probability of predetermined number packet.
The statistic processes of retransmission probability is specially among the described step B:
Described base station obtains the retransmission probability statistical value according to the new bag indication information in the packet that receives.
The statistic processes of retransmission probability is specially among the described step B:
The packet that described base station demodulate reception arrives;
Obtain the retransmission probability statistical value according to erroneous packets number after the demodulation.
Described step C comprises:
C1, described base station are in the size of the operation interval of more described retransmission probability statistical value of each Transmission Time Interval and retransmission probability;
C2, in predetermined period, issue power adjustment commands to described travelling carriage according to comparative result.
Described step C2 comprises:
Prescribe a time limit less than the following of described operation interval when described retransmission probability statistical value, issue the power decreasing order to described travelling carriage;
Prescribe a time limit greater than going up of described operation interval when described retransmission probability statistical value, issue power to described travelling carriage and raise order;
When described retransmission probability statistical value is in described operation interval, issues to described travelling carriage and not adjust order.
Described step D is specially: described travelling carriage raises described up enhancing channel transmitting power after receiving predetermined rise order continuously.
Described step D is specially: described travelling carriage is reduced described up enhancing channel transmitting power after receiving a predetermined down command continuously.
Described method also comprises:
The data re-transmission power of up enhancing channel is less than the rate of just passing on Gong when adopting soft merging demodulate reception data.
By above technical scheme provided by the invention as can be seen, the present invention is in the ARQ system, by NodeB the data retransmission probability is added up, the situation of change of monitoring UE emission data re-transmission probability, and, do not need the participation of RNC according to the power bias of the up enhancing channel of statistics calculation control UE, realize simple, owing to reduced the propagation delay time of metrical information, therefore improved the accuracy of power bias correction; UE dynamically adjusts up enhancing channel transmitting power by the power control commands that NodeB passes down, makes retransmission probability converge to best operation interval, thereby can make system obtain best throughput, has further improved power system capacity.
Description of drawings
Fig. 1 is the course of work schematic diagram of ARQ in the prior art;
Fig. 2 is the flow chart of the inventive method.
Embodiment
Core of the present invention is in the ARQ system, the data retransmission probability is added up according to the data message of the UE that receives by NodeB oneself, and according to the power bias of the up enhancing channel of the operation interval calculation control UE of the retransmission probability of statistics and RNC configuration, and issue corresponding power adjustment commands to UE according to result of calculation, UE adjusts order according to this and changes up enhancing channel transmitting power, makes retransmission probability converge to best operation interval.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
The present technique field personnel know, ARQ (automatically repeat requests) just requires a kind of transmission mechanism of retransmitting when being a data transmission fails.Under the wireless transmission environment; interchannel noise and because the decline that brings of mobility and other users' interference make channel transmission quality relatively poor; in order to guarantee communication quality; just must be protected the data grouping; FEC (forward error correction coding) is mainly adopted in this protection, i.e. the extra overhead bit of transmission in grouping.
Its course of work is as shown in Figure 1:
Transmitting terminal UE (travelling carriage) sends data to receiving terminal NodeB (base station), after NodeB receives data, these data is carried out demodulation.After demodulation,, then send out ACK (affirmation) signal to UE if NoedB thinks that the data that receive are errorless, after ack signal arrives UE, UE thinks that NodeB has correctly received last data, so start new data transmission procedure according to the ack signal that receives; If NodeB thinks that the data that receive have the mistake that can not correct after receiving data after testing, then send out NACK (not confirming) signal to UE.After the NACK signal arrived UE, UE thought that Node B does not have the correct last data that receive, so retransmit last data according to the NACK signal that receives.
UE can learn the number of transmissions of the data block that sends according to the feedback information of Node B, therefore, in the present invention, UE is at every turn when Node B sends data, whether the capital transmission comprises these data at least is the new bag indication of new data, therefore, Node B adds up according to new bag indication the carrying out retransmission probability that UE uploads.Retransmission probability has been arranged, Node B just can be according to this statistical value and by the operation interval of RNC to the retransmission probability of its configuration, and just the span of Pei Zhi retransmission probability is come the transmitting power of the E-DPDCH (special physical data channel for upload enhance) of calculation control UE.
With reference to Fig. 2, Fig. 2 is the realization flow figure of the inventive method, may further comprise the steps:
At first, in step 201: the operation interval of configuration retransmission probability, promptly RNC (radio network controller) is by the working range of message informing Node B retransmission probability, for example: 10%-20%.
The configuration of retransmission probability is relevant with the design of whole system, for example, whether adopts soft merging.
Then, enter step 202: carry out the retransmission probability statistics by Node B at each TTI (Transmission Time Interval) by predetermined way.Described predetermined way can be the retransmission probability in the statistics scheduled time; It also can be the retransmission probability that statistics sends the predetermined number packet; Also can be that this dual mode uses together.
Statistical method as previously described, the new bag indication of uploading according to UE or judge according to demodulation result whether the data that receive correct, and then statistics retransmission probability.
Such as, the retransmission probability in the statistics scheduled time, can add up in the following manner:
(1) new bag indication the carrying out retransmission probability statistics of uploading according to UE
In the new bag indication nearest a period of time of statistics of uploading according to UE, 10s for example, UE sends the sum of old bag, adds up the sum of the packet that UE during this period of time sends, and the ratio of the two is the statistical value of the retransmission probability that the new bag indication of uploading according to UE draws.
(2) whether correctly receive according to the demodulation result judgment data of Node B and carry out the retransmission probability statistics
Add up the overall budget number that nearest a period of time receives mistake according to demodulation result, and the overall budget number of interior during this period of time Node B reception data, the ratio of the two is the statistical value of the retransmission probability that whether correctly receives and then draw according to the demodulation result judgment data.
The present technique field personnel know; in up enhancement techniques; though UE has set up E-UL (uplink enhanced link); but the data that this link need send may be interrupted; when perhaps having data to upload; Node B does not allow to upload according to the loading condition of system, therefore, the situation that UE does not have data upload occurs through regular meeting.In this case, though UE does not upload data, Node B still can judge it is whether UE has data to send by the indication of control channel.
Consider above-mentioned reason, the present invention also can obtain retransmission probability by the packet of statistics transmission predetermined number.Such as, after Node B receives 1000 packets, add up the erroneous packets number in these 1000 packets, thereby obtain the retransmission probability that UE sends these 1000 packets.Like this, just can avoid in one section official hour, the overall budget number that UE sends is seldom the time, makes statistics produce situation than mistake.
Above-mentioned these two kinds of statisticals also can use simultaneously, when the overall budget number that UE sends in Node B monitors certain period is relatively more even, based on the retransmission probability in the statistics scheduled time; The overall budget number that UE sends in Node B monitors certain period sends the retransmission probability of predetermined number packet seldom the time based on statistics.Perhaps when all satisfying predetermined conditions, the retransmission probability of dual mode statistics just the transmitting power of uplink enhanced link is adjusted.
Retransmission probability has been arranged, and Node B just can be according to the transmitting power of E-DPDCH of the retransmission probability value calculation control UE of oneself statistics.
So enter step 203: the base station relatively retransmits the size of the operation interval of probability statistics value and retransmission probability at each Transmission Time Interval.
Then, in predetermined period, issue power adjustment commands according to comparative result to UE.Can in each TTI (Transmission Time Interval), issue the adjustment order according to comparative result; In order to reduce the signaling consumption of down order, Node B not necessarily will issue power adjustment commands at each TTI, can in predetermined several TTI, issue once adjustment order according to comparative result, for example, can regard several TTI as one-period, in this cycle, comparative result in each TTI can be different, at this moment, then need the retransmission probability in whole cycle is assessed, promptly calculate the retransmission probability in this cycle, the operation interval to this retransmission probability value and retransmission probability compares again, judges whether that according to comparative result needs adjust the up enhancing channel transmitting power of UE.
If the retransmission probability statistical value is prescribed a time limit less than the following of retransmission probability operation interval, enter step 204: issue the power decreasing order to UE;
Prescribe a time limit greater than going up of retransmission probability operation interval when the retransmission probability statistical value, enter step 205: issue power to UE and raise order;
When the retransmission probability statistical value is in the retransmission probability operation interval, enter step 206: issue to UE and do not adjust order.
After UE receives mentioned order, enter step 207: according to the up enhancing channel transmitting power of power adjustment commands correction.
When UE receives down command, predetermined step delta 1 of downward modulation on the transmitting power basis that sets in advance; When UE receives the rise order, on the transmitting power basis that sets in advance, raise a predetermined step delta 2; When UE receives uncomfortable order, keep the former transmitting power that sets in advance constant.
For example, the transmitting power that sets in advance is Pn, and then adjusted power P n ' satisfies following relation:
Wherein, Δ 1 and Δ 2 are the number greater than zero, and concrete numerical value can be determined by emulation.
UE can promptly do corresponding adjustment according to this order to the E-DPDCH channel transmitting power after whenever receiving an adjustment order; Also can after receiving predetermined rise order continuously, raise the E-DPDCH channel transmitting power again, or after receiving a predetermined down command continuously, reduce the E-DPDCH channel transmitting power again.
For example, UE receives that at each TTI is adjusted an order, and UE is processed in units adjustment order with 5 TTI, and for 4 TTI in front, UE does not all adjust to transmitting power no matter receive rise or down command; When the 5th TTI, transmitting power is done corresponding adjustment according to the adjustment order of receiving.
The present technique field personnel know, the E-DPDCH channel transmitting power of UE is pre-configured, and the transmitting power of physical channel can be identical when the transmitting power of physical channel was with re-transmission during initial transmission, also can be different.It is exactly on this pre-configured power basis that the adjustment order that UE issues according to Node B adjusts accordingly the E-DPDCH channel transmitting power, increases or reduces.
If consider the recipient's that soft merging brings in the HARQ technology gain, when adjusting, can make full use of this gain, change adjusting range.
For example, suppose that the gain that soft merging brings is P
0, then can be with above-mentioned power redjustment and modification:
Wherein, Δ
0Be and P
0A relevant numerical value, this value need be determined by emulation equally.
Like this, the gain that brings in conjunction with soft merging, can make because channel condition changes the control that causes more reasonable, system be changed satisfying to make in the scope of retransmission probability in the best under the situation that receptivity requires, further the throughput of enhanced system up enhancing channel transmitting power.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (10)
1, a kind of method of adjusting automatic repeat requests system transmit signal power, described system comprises radio network controller, base station and travelling carriage, it is characterized in that, described method comprises:
The operation interval of A, configuration retransmission probability;
B, carry out retransmission probability statistics by described base station at each Transmission Time Interval by predetermined way;
C, issue power adjustment commands to described travelling carriage according to the operation interval and the described retransmission probability statistical value of described retransmission probability;
D, described travelling carriage are according to the up enhancing channel transmitting power of described power adjustment commands correction.
2, the method for the automatic repeat requests of adjustment according to claim 1 system transmit signal power is characterized in that described steps A is specially:
Set the operation interval of described retransmission probability;
By described radio network controller the operation interval of the retransmission probability of described setting is sent to described base station.
3, the method for the automatic repeat requests of adjustment according to claim 1 system transmit signal power is characterized in that described predetermined way comprises:
Retransmission probability in the statistics scheduled time; And/or
Statistics sends the retransmission probability of predetermined number packet.
4, according to the method for claim 1 or the automatic repeat requests of 3 described adjustment system transmit signal power, it is characterized in that the statistic processes of retransmission probability is specially among the described step B:
Described base station obtains the retransmission probability statistical value according to the new bag indication information in the packet that receives.
5, according to the method for claim 1 or the automatic repeat requests of 3 described adjustment system transmit signal power, it is characterized in that the statistic processes of retransmission probability is specially among the described step B:
The packet that described base station demodulate reception arrives;
Obtain the retransmission probability statistical value according to erroneous packets number after the demodulation.
6, the method for the automatic repeat requests of adjustment according to claim 1 system transmit signal power is characterized in that described step C comprises:
C1, described base station are in the size of the operation interval of more described retransmission probability statistical value of each Transmission Time Interval and retransmission probability;
C2, in predetermined period, issue power adjustment commands to described travelling carriage according to comparative result.
7, the method for the automatic repeat requests of adjustment according to claim 6 system transmit signal power is characterized in that described step C2 comprises:
Prescribe a time limit less than the following of described operation interval when described retransmission probability statistical value, issue the power decreasing order to described travelling carriage;
Prescribe a time limit greater than going up of described operation interval when described retransmission probability statistical value, issue power to described travelling carriage and raise order;
When described retransmission probability statistical value is in described operation interval, issues to described travelling carriage and not adjust order.
8, the method for the automatic repeat requests of adjustment according to claim 7 system transmit signal power is characterized in that described step D is specially: described travelling carriage raises described up enhancing channel transmitting power after receiving predetermined rise order continuously.
9, the method for the automatic repeat requests of adjustment according to claim 7 system transmit signal power is characterized in that described step D is specially: described travelling carriage is reduced described up enhancing channel transmitting power after receiving a predetermined down command continuously.
10, the method for the automatic repeat requests of adjustment according to claim 1 system transmit signal power is characterized in that described method also comprises:
The data re-transmission power of up enhancing channel is less than the rate of just passing on Gong when adopting soft merging demodulate reception data.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997638B (en) * | 2009-08-19 | 2013-04-24 | 华为技术有限公司 | Method and device for determining parameters used for detecting hybrid automatic repeat request-acknowledgement (HARQ-ACK) signals |
| WO2015061994A1 (en) * | 2013-10-30 | 2015-05-07 | 华为技术有限公司 | Method and equipment for convergence of outer loop power control |
| CN104812044A (en) * | 2014-01-23 | 2015-07-29 | 华为技术有限公司 | Transmission control method, user equipment and base station |
| CN108155967A (en) * | 2016-12-05 | 2018-06-12 | 中国移动通信有限公司研究院 | The transmission method and device of sensing data, sensor, gateway and system |
| CN108650038A (en) * | 2018-05-08 | 2018-10-12 | 商派软件有限公司 | The method and system of regional network quality is judged with the retransmission rate of data packet |
| CN113711514A (en) * | 2019-04-23 | 2021-11-26 | 松下电器（美国）知识产权公司 | Base station, terminal and communication method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6738370B2 (en) * | 2001-08-22 | 2004-05-18 | Nokia Corporation | Method and apparatus implementing retransmission in a communication system providing H-ARQ |
| CN1213557C (en) * | 2001-09-25 | 2005-08-03 | 华为技术有限公司 | Link self adaptation method based on self adaptation coded modulation and automatic retransmission request |
| CN1155182C (en) * | 2001-09-27 | 2004-06-23 | 华为技术有限公司 | Power control method based on mixed automatic retransmission mechanism |
| KR100876765B1 (en) * | 2002-05-10 | 2009-01-07 | 삼성전자주식회사 | Apparatus for retransmitting data in mobile communication system and method thereof |
| US20040190485A1 (en) * | 2003-03-24 | 2004-09-30 | Khan Farooq Ullah | Method of scheduling grant transmission in a wireless communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997638B (en) * | 2009-08-19 | 2013-04-24 | 华为技术有限公司 | Method and device for determining parameters used for detecting hybrid automatic repeat request-acknowledgement (HARQ-ACK) signals |
| WO2015061994A1 (en) * | 2013-10-30 | 2015-05-07 | 华为技术有限公司 | Method and equipment for convergence of outer loop power control |
| CN104812044A (en) * | 2014-01-23 | 2015-07-29 | 华为技术有限公司 | Transmission control method, user equipment and base station |
| CN108155967A (en) * | 2016-12-05 | 2018-06-12 | 中国移动通信有限公司研究院 | The transmission method and device of sensing data, sensor, gateway and system |
| CN108155967B (en) * | 2016-12-05 | 2020-04-14 | 中国移动通信有限公司研究院 | Method and device for transmitting sensing data, sensor, gateway and system |
| CN108650038A (en) * | 2018-05-08 | 2018-10-12 | 商派软件有限公司 | The method and system of regional network quality is judged with the retransmission rate of data packet |
| CN113711514A (en) * | 2019-04-23 | 2021-11-26 | 松下电器（美国）知识产权公司 | Base station, terminal and communication method |
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