CN102271390A - Method and system for controlling outer loop power - Google Patents
Method and system for controlling outer loop power Download PDFInfo
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- CN102271390A CN102271390A CN2011102183906A CN201110218390A CN102271390A CN 102271390 A CN102271390 A CN 102271390A CN 2011102183906 A CN2011102183906 A CN 2011102183906A CN 201110218390 A CN201110218390 A CN 201110218390A CN 102271390 A CN102271390 A CN 102271390A
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Abstract
The invention discloses a method and system for controlling an outer loop power. The method comprises steps of: obtaining an uplink packet error rate within the threshold of a current modulating and coding scheme; adjusting the threshold of the current modulating and coding scheme according to the packet error rate; and adjusting the outer loop power according to the adjusted threshold of the modulating and coding scheme. According to the technical scheme, a method and system for controlling the outer loop power more rationally are provided.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of control method and system of exterior ring power.
Background technology
In wireless communications environment, for overcome the wireless signal slow fading to the influence of signal, prevent that power from unrealistically comparing rising, satisfying reduce under the situation of communication quality as far as possible transmitting power etc. all needs introduce power control.At present, what generally adopt is by adjusting signal to noise ratio (the Carrier to Interference and Noise Ratio of up channel, CINR) value is adjusted exterior ring power, yet, OFDM (Orthogonal Frequency Division Multiple Access, OFDMA) a plurality of Modulation and Coding Scheme (Modulation and Coding Scheme is arranged in the communication system, MCS), for each MCS independent thresholding is arranged all, directly adjusting the CINR value will make the thresholding of each MCS all be subjected to identical influence, if all MCS adjust simultaneously in the ofdma communication system, then can't satisfy the channel condition of each terminal simultaneously, such as, for the reasonable terminal of channel condition, may there be certain waste in its transmitting power, and has increased in the reverse sector to a certain extent and the co-channel interference between the sector.
Summary of the invention
The invention provides a kind of more reasonably control method and the system of exterior ring power.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of control method of exterior ring power comprises:
Obtain the up Packet Error Ratio under the thresholding of current Modulation and Coding Scheme;
Adjust the thresholding of described current Modulation and Coding Scheme according to described Packet Error Ratio;
Thresholding according to adjusted Modulation and Coding Scheme is adjusted exterior ring power.
The step of adjusting the thresholding of described current Modulation and Coding Scheme according to described Packet Error Ratio comprises: whether judge described Packet Error Ratio greater than presetting first threshold, if described Packet Error Ratio greater than described first threshold, then improves the thresholding of described current Modulation and Coding Scheme; Judge that whether described Packet Error Ratio is less than the second default threshold value, if described Packet Error Ratio less than described second threshold value, then reduces the thresholding of described current Modulation and Coding Scheme; Described first threshold is greater than described second threshold value.
The step of adjusting the thresholding of described current Modulation and Coding Scheme according to described Packet Error Ratio also comprises: whether the adjusted value of judging the thresholding of the Modulation and Coding Scheme that adds up surpasses default maximum adjusting range, if then adjust the thresholding of described current Modulation and Coding Scheme according to described default maximum adjusting range.
The step of the up Packet Error Ratio under the described thresholding that obtains current Modulation and Coding Scheme comprises:
The total number of the upstream data bag in the statistics predetermined period under the thresholding of described current Modulation and Coding Scheme and the number of misdata bag;
Calculate described Packet Error Ratio according to the total number of the upstream data bag that draws of statistics and the number of described misdata bag in the described predetermined period.
Before adjusting the thresholding of described current Modulation and Coding Scheme, also comprise according to described Packet Error Ratio:
Whether total number of judging the upstream data bag that statistics draws in the described predetermined period reaches first preset value, and whether described predetermined period reaches second preset value;
If the both reaches, then change the treatment step of adjusting the thresholding of described current Modulation and Coding Scheme according to described Packet Error Ratio over to;
Otherwise, the total number of the upstream data bag under the thresholding of the described current Modulation and Coding Scheme of then continuation accumulative total and the number of misdata bag, and upgrade described Packet Error Ratio according to the total number of the upstream data bag after the accumulative total and the number of misdata bag, adjust the thresholding of described current Modulation and Coding Scheme according to the Packet Error Ratio after upgrading.
Whether total number of the upstream data bag that statistics draws in judging described predetermined period reaches first preset value, and whether described predetermined period reaches before second preset value, also comprise: judge that whether described Packet Error Ratio is greater than the 3rd threshold value, if, then directly improve the thresholding of described current Modulation and Coding Scheme according to described Packet Error Ratio, described the 3rd threshold value is greater than described first threshold; If not, then change total number of judging upstream data bag in the described predetermined period over to and whether reach first preset value, and whether described predetermined period reaches the treatment step of second preset value.
Described Packet Error Ratio is that the head of upstream data bag passes Packet Error Ratio.
(Hybrid Automatic Repeat Request, HARQ) unit obtains the thresholding described first biography Packet Error Ratio down of current Modulation and Coding Scheme by mixing automatic repeat requests.
A kind of control system of exterior ring power comprises Packet Error Ratio acquiring unit, thresholding adjustment unit and exterior ring power adjustment unit, wherein,
Described Packet Error Ratio acquiring unit is used to obtain the up Packet Error Ratio under the thresholding of current Modulation and Coding Scheme;
Described thresholding adjustment unit is used for adjusting according to the described Packet Error Ratio that described Packet Error Ratio acquiring unit obtains the thresholding of described current Modulation and Coding Scheme;
Described exterior ring power adjustment unit is used for adjusting exterior ring power according to the thresholding of the adjusted Modulation and Coding Scheme of described thresholding adjustment unit.
Whether described thresholding adjustment unit specifically is used to judge described Packet Error Ratio greater than presetting first threshold, if described Packet Error Ratio greater than described first threshold, then improves the thresholding of described current Modulation and Coding Scheme; Judge that whether described Packet Error Ratio is less than the second default threshold value, if described Packet Error Ratio less than described second threshold value, then reduces the thresholding of described current Modulation and Coding Scheme; Described first threshold is greater than described second threshold value.
Described thresholding adjustment unit is used to also to judge whether the adjusted value of thresholding of the Modulation and Coding Scheme of accumulative total surpasses default maximum adjusting range, if then adjust the thresholding of described current Modulation and Coding Scheme according to described default maximum adjusting range.
Described Packet Error Ratio acquiring unit specifically is used to add up the total number of the upstream data bag under the described current Modulation and Coding Scheme thresholding in the predetermined period and the number of misdata bag; Calculate described up Packet Error Ratio according to the total number of described upstream data bag and the number of described misdata bag.
Described thresholding adjustment unit is adjusted described current Modulation and Coding Scheme thresholding according to described Packet Error Ratio before, described thresholding adjustment unit is used to also judge whether total number of adding up the upstream data bag that draws in the described predetermined period reaches first preset value, and whether described predetermined period reaches second preset value; If then described thresholding adjustment unit is used for adjusting described current Modulation and Coding Scheme thresholding according to described Packet Error Ratio; If not, then described Packet Error Ratio acquiring unit is used to continue the total number of the upstream data bag under the described current Modulation and Coding Scheme thresholding of accumulative total and the number of misdata bag, and upgrading described Packet Error Ratio according to the total number of the upstream data bag after the accumulative total and the number of misdata bag, described thresholding adjustment unit is used for adjusting described current Modulation and Coding Scheme thresholding according to the Packet Error Ratio after upgrading.
Whether total number of judging the upstream data bag that statistics draws in the described predetermined period at described thresholding adjustment unit reaches first preset value, and whether described predetermined period reaches before second preset value, described thresholding adjustment unit is used to also judge that whether described Packet Error Ratio is greater than the 3rd threshold value, if, then directly improve described current Modulation and Coding Scheme MCS thresholding according to described Packet Error Ratio, described the 3rd threshold value is greater than described first threshold; If not, then described thresholding adjustment unit is used to also judge whether total number of upstream data bag in the described predetermined period reaches first preset value, and whether described predetermined period reaches second preset value.
The head that described Packet Error Ratio acquiring unit specifically is used to obtain the upstream data bag under the thresholding of current Modulation and Coding Scheme passes Packet Error Ratio.
Described Packet Error Ratio acquiring unit is for mixing automatic repeat requests unit, and the head that the automatic repeat requests of described mixing unit is used to obtain the upstream data bag under the thresholding of current Modulation and Coding Scheme passes Packet Error Ratio.
The invention provides a kind of control method and system of exterior ring power, adjust the thresholding of current Modulation and Coding Scheme, adjust exterior ring power according to the thresholding of adjusted Modulation and Coding Scheme again according to the up Packet Error Ratio under the thresholding of current Modulation and Coding Scheme.The present invention has realized the independent adjustment to single MCS thresholding, compared to existing technology, to the unified mode of adjusting of all MCS thresholdings in the system, more reasonable, simultaneously by adjusting the MCS thresholding and then having limited the scope of terminal transmit power indirectly, avoided direct adjustment transmitting power, cause and adjust frequent and the uppity defective of scope, for channel status terminal preferably, under the prerequisite that does not influence user experience, reduced the transmitting power of this terminal, also reduced in the reverse sector and the co-channel interference between the sector simultaneously.
Description of drawings
Fig. 1 is the flow chart of the control method of a kind of exterior ring power of the embodiment of the invention;
Fig. 2 is the flow chart of the control method of a kind of exterior ring power of another embodiment of the present invention;
Fig. 3 is the frame diagram of the control system of a kind of exterior ring power of the embodiment of the invention.
Embodiment
In conjunction with the accompanying drawings the present invention is described in further detail below by embodiment.
Fig. 1 is the flow chart of the control method of a kind of exterior ring power of the embodiment of the invention, please refer to Fig. 1:
S11, obtain the up Packet Error Ratio under the thresholding of current Modulation and Coding Scheme;
S12, adjust the thresholding of described current Modulation and Coding Scheme according to described Packet Error Ratio;
S13, adjust exterior ring power according to the thresholding of adjusted Modulation and Coding Scheme.
Fig. 2 is the flow chart of the control method of a kind of exterior ring power of another embodiment of the present invention, please refer to Fig. 2:
Up first total number and the first number that passes the misdata bag that passes packet in S21, the HARQ statistics predetermined period under the current MCS thresholding; Wherein, the first total number that passes packet refers to total number of data packets for transmission first, does not comprise the number of the packet of re-transmission; The first number that passes the misdata bag refers to the number of the packet that transmission first just makes a mistake;
S22, calculate the up first Packet Error Ratio that passes according to up first total number and the first number that passes the misdata bag that passes packet in this predetermined period; First biography Packet Error Ratio refers to first, and transmission accounts for the probability of data packets for transmission sum first with regard to the packet that makes a mistake;
S23, whether judge in this predetermined period the first Packet Error Ratio that passes, if then first to pass Packet Error Ratio too high in explanation, needs in time to adjust the MCS thresholding, enters step S26, if not, then enters step S24 greater than the 3rd threshold value;
S24, judge whether the up first total number that passes packet that statistics draws in this predetermined period reaches first preset value (judging whether to satisfy condition 1), and whether this predetermined period reaches second preset value (judging whether to satisfy condition 2), if the both reaches, then enter step S25, as long as have one not satisfy among both, then enter step S21, continue up first total number and the first number that passes the misdata bag that passes packet under the current MCS thresholding of accumulative total;
Whether S25, judgement head pass Packet Error Ratio greater than presetting first threshold, if, then enter step S26, if not, enter step S27;
S26, improve the thresholding of current MCS by default step-length, preferred step-length is 1dB, enters step S210;
Whether S27, judgement head pass Packet Error Ratio less than the second default threshold value, if, then enter step S28, if not, enter step S29;
S28, reduce the thresholding of current MCS by default step-length, preferred step-length is 1dB, enters step S210;
S29, abandon the thresholding of current MCS is adjusted, enter step S213;
S210, judge accumulative total the adjusted value of MCS thresholding whether greater than default maximum adjusting range, if, then enter step S211, if not, enter step S212;
S211, reduce the size of this adjusted value, readjust current MCS thresholding, make the adjusted value of accumulative total not exceed default maximum adjusting range, enter step S212 according to default maximum adjusting range;
S212, adjust exterior ring power, enter step 213 according to adjusted MCS thresholding;
S213, end.
Wherein the 3rd threshold value is greater than first threshold, and first threshold is greater than second threshold value, and the method for adjusting exterior ring power according to adjusted MCS thresholding adopts prior art.
Present embodiment also comprises a kind of control system of exterior ring power, and this system comprises Packet Error Ratio acquiring unit, thresholding adjustment unit and exterior ring power adjustment unit, and wherein, the Packet Error Ratio acquiring unit is used to obtain the up Packet Error Ratio under the thresholding of current Modulation and Coding Scheme; The thresholding adjustment unit is used for adjusting according to the described Packet Error Ratio that described Packet Error Ratio acquiring unit obtains the thresholding of described current Modulation and Coding Scheme; The exterior ring power adjustment unit is used for adjusting exterior ring power according to the thresholding of the adjusted Modulation and Coding Scheme of described thresholding adjustment unit.
Fig. 3 is the frame diagram of the control system of a kind of exterior ring power of the embodiment of the invention, please refer to Fig. 3:
A kind of control system of exterior ring power comprises Packet Error Ratio acquiring unit 31, thresholding adjustment unit 32 and exterior ring power adjustment unit 33, wherein,
Packet Error Ratio acquiring unit 31 is used to obtain the up Packet Error Ratio under the current MCS thresholding, specifically is used to add up the total number of the upstream data bag under the current MCS thresholding in the predetermined period and the number of misdata bag; Calculate described up Packet Error Ratio according to the total number of described upstream data bag and the number of described misdata bag.
Further, Packet Error Ratio acquiring unit 31 is HARQ, and HARQ is used to obtain the up first Packet Error Ratio that passes under the current Modulation and Coding Scheme MCS thresholding.
Thresholding adjustment unit 32 is used for adjusting according to the Packet Error Ratio that Packet Error Ratio acquiring unit 31 obtains the thresholding of current MCS, whether specifically is used to judge Packet Error Ratio greater than presetting first threshold, if Packet Error Ratio greater than first threshold, then improves the thresholding of current MCS; Whether judge Packet Error Ratio less than the second default threshold value, if Packet Error Ratio less than second threshold value, then reduces the thresholding of current MCS, wherein first threshold is greater than second threshold value.
Further, thresholding adjustment unit 32 is used to also to judge whether the adjusted value of thresholding of the Modulation and Coding Scheme of accumulative total surpasses default maximum adjusting range, if then adjust the thresholding of described current Modulation and Coding Scheme according to described default maximum adjusting range.
Further, before thresholding adjustment unit 32 is adjusted the thresholding of current MCS according to Packet Error Ratio, thresholding adjustment unit 32 is used to also judge that Packet Error Ratio acquiring unit 31 adds up total number of the upstream data bag that draws and whether reach first preset value in this predetermined period, and whether this predetermined period reaches second preset value; If then thresholding adjustment unit 32 is used for adjusting according to this Packet Error Ratio the thresholding of current MCS; If not, then Packet Error Ratio acquiring unit 31 also is used to continue the total number of the upstream data bag under the current MCS thresholding of accumulative total and the number of misdata bag, and according to the total number of the upstream data bag after the accumulative total and the number renewal Packet Error Ratio of misdata bag, thresholding adjustment unit 32 is used for adjusting according to the Packet Error Ratio after upgrading the thresholding of current MCS.
Further, in order to tackle the too high situation of Packet Error Ratio transience, whether total number of the upstream data bag that statistics draws in judging this predetermined period reaches first preset value, and whether this predetermined period reaches before second preset value, thresholding adjustment unit 32 is used to also judge that whether Packet Error Ratio is greater than the 3rd threshold value, if then thresholding adjustment unit 32 directly improves the thresholding of current MCS according to this Packet Error Ratio; If not, then thresholding adjustment unit 32 is used to also judge whether total number of upstream data bag in this predetermined period reaches first preset value, and whether this predetermined period reaches second preset value.
Exterior ring power adjustment unit 33 is used for adjusting exterior ring power according to the thresholding of thresholding adjustment unit 32 adjusted MCS.
Present embodiment, wherein the 3rd threshold value is greater than first threshold, and first threshold is greater than second threshold value, and the method for adjusting exterior ring power according to adjusted MCS thresholding adopts prior art.
Above content be in conjunction with concrete execution mode to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (15)
1. the control method of an exterior ring power is characterized in that, comprising:
Obtain the up Packet Error Ratio under the thresholding of current Modulation and Coding Scheme;
Adjust the thresholding of described current Modulation and Coding Scheme according to described Packet Error Ratio;
Thresholding according to adjusted Modulation and Coding Scheme is adjusted exterior ring power.
2. the method for claim 1, it is characterized in that, the step of adjusting the thresholding of described current Modulation and Coding Scheme according to described Packet Error Ratio comprises: judge that whether described Packet Error Ratio is greater than presetting first threshold, if described Packet Error Ratio greater than described first threshold, then improves the thresholding of described current Modulation and Coding Scheme; Judge that whether described Packet Error Ratio is less than the second default threshold value, if described Packet Error Ratio less than described second threshold value, then reduces the thresholding of described current Modulation and Coding Scheme; Wherein, described first threshold is greater than described second threshold value.
3. the described method of claim 2, it is characterized in that, the step of adjusting the thresholding of described current Modulation and Coding Scheme according to described Packet Error Ratio also comprises: whether the adjusted value of judging the thresholding of the Modulation and Coding Scheme that adds up surpasses default maximum adjusting range, if then adjust the thresholding of described current Modulation and Coding Scheme according to described default maximum adjusting range.
4. the method for claim 1 is characterized in that, the step of the up Packet Error Ratio under the described thresholding that obtains current Modulation and Coding Scheme comprises:
The total number of the upstream data bag in the statistics predetermined period under the thresholding of described current Modulation and Coding Scheme and the number of misdata bag;
Calculate described Packet Error Ratio according to the total number of the upstream data bag that draws of statistics and the number of described misdata bag in the described predetermined period.
5. method as claimed in claim 4 is characterized in that, before adjusting the thresholding of described current Modulation and Coding Scheme according to described Packet Error Ratio, also comprises:
Whether total number of judging the upstream data bag that statistics draws in the described predetermined period reaches first preset value, and whether described predetermined period reaches second preset value;
If the both reaches, then change the treatment step of adjusting the thresholding of described current Modulation and Coding Scheme according to described Packet Error Ratio over to;
Otherwise, then continue the total number of the upstream data bag under the thresholding of the described current Modulation and Coding Scheme of accumulative total and the number of misdata bag, and upgrade described Packet Error Ratio according to the total number of the upstream data bag after the accumulative total and the number of misdata bag.
6. method as claimed in claim 5, it is characterized in that, whether total number of the upstream data bag that statistics draws in judging described predetermined period reaches first preset value, and whether described predetermined period reaches before second preset value, also comprise: whether judge described Packet Error Ratio greater than the 3rd threshold value, if then directly improve the thresholding of described current Modulation and Coding Scheme according to described Packet Error Ratio, wherein, described the 3rd threshold value is greater than described first threshold; If not, then change total number of judging upstream data bag in the described predetermined period over to and whether reach first preset value, and whether described predetermined period reaches the treatment step of second preset value.
7. as each described method of claim 1 to 6, it is characterized in that described Packet Error Ratio is that the head of upstream data bag passes Packet Error Ratio.
8. the control system of an exterior ring power is characterized in that, comprises Packet Error Ratio acquiring unit, thresholding adjustment unit and exterior ring power adjustment unit, wherein,
Described Packet Error Ratio acquiring unit is used to obtain the up Packet Error Ratio under the thresholding of current Modulation and Coding Scheme;
Described thresholding adjustment unit is used for adjusting according to the described Packet Error Ratio that described Packet Error Ratio acquiring unit obtains the thresholding of described current Modulation and Coding Scheme;
Described exterior ring power adjustment unit is used for adjusting exterior ring power according to the thresholding of the adjusted Modulation and Coding Scheme of described thresholding adjustment unit.
9. system as claimed in claim 8, it is characterized in that, whether described thresholding adjustment unit specifically is used to judge described Packet Error Ratio greater than presetting first threshold, if described Packet Error Ratio greater than described first threshold, then improves the thresholding of described current Modulation and Coding Scheme; Judge that whether described Packet Error Ratio is less than the second default threshold value, if described Packet Error Ratio less than described second threshold value, then reduces the thresholding of described current Modulation and Coding Scheme; Described first threshold is greater than described second threshold value.
10. system as claimed in claim 9, it is characterized in that, described thresholding adjustment unit is used to also to judge whether the adjusted value of thresholding of the Modulation and Coding Scheme of accumulative total surpasses default maximum adjusting range, if then adjust the thresholding of described current Modulation and Coding Scheme according to described default maximum adjusting range.
11. system as claimed in claim 8 is characterized in that, described Packet Error Ratio acquiring unit specifically is used to add up the total number of the upstream data bag under the described current Modulation and Coding Scheme thresholding in the predetermined period and the number of misdata bag; Calculate described up Packet Error Ratio according to the total number of described upstream data bag and the number of described misdata bag.
12. system as claimed in claim 11, it is characterized in that, described thresholding adjustment unit is adjusted described current Modulation and Coding Scheme thresholding according to described Packet Error Ratio before, described thresholding adjustment unit is used to also judge whether total number of adding up the upstream data bag that draws in the described predetermined period reaches first preset value, and whether described predetermined period reaches second preset value; If the both reaches, then described thresholding adjustment unit is used for adjusting described current Modulation and Coding Scheme thresholding according to described Packet Error Ratio; If not, then described Packet Error Ratio acquiring unit is used to continue the total number of the upstream data bag under the described current Modulation and Coding Scheme thresholding of accumulative total and the number of misdata bag, and upgrades described Packet Error Ratio according to the total number of the upstream data bag after the accumulative total and the number of misdata bag.
13. system as claimed in claim 12, it is characterized in that, whether total number of judging the upstream data bag that statistics draws in the described predetermined period at described thresholding adjustment unit reaches first preset value, and whether described predetermined period reaches before second preset value, described thresholding adjustment unit is used to also judge that whether described Packet Error Ratio is greater than the 3rd threshold value, if, then directly improve described current Modulation and Coding Scheme thresholding according to described Packet Error Ratio, wherein, described the 3rd threshold value is greater than described first threshold; If not, then described thresholding adjustment unit is used to also judge whether total number of upstream data bag in the described predetermined period reaches first preset value, and whether described predetermined period reaches second preset value.
14., it is characterized in that the head that described Packet Error Ratio acquiring unit specifically is used to obtain the upstream data bag under the thresholding of current Modulation and Coding Scheme passes Packet Error Ratio as each described system of claim 8 to 13.
15. system as claimed in claim 14, it is characterized in that, described Packet Error Ratio acquiring unit is for mixing automatic repeat requests unit, and the head that the automatic repeat requests of described mixing unit is used to obtain the upstream data bag under the thresholding of current Modulation and Coding Scheme passes Packet Error Ratio.
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