CN104936301A - Downlink frequency selection scheduling method - Google Patents
Downlink frequency selection scheduling method Download PDFInfo
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- CN104936301A CN104936301A CN201410106931.XA CN201410106931A CN104936301A CN 104936301 A CN104936301 A CN 104936301A CN 201410106931 A CN201410106931 A CN 201410106931A CN 104936301 A CN104936301 A CN 104936301A
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- sinr
- mcs
- noise ratio
- cqi
- plus noise
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a downlink frequency selection scheduling method. The method comprises the following steps that A, a base station calculates a broadband signal to interference and noise ratio SINRMCS of user equipment; B, the base station converts sub-band difference channel quality indicator CQI reported by the user equipment into a signal to interference and noise ratio difference value deltaSINRsub of a corresponding sub-band; C, an equivalent signal to interference and noise ratio of each sub-band of the user equipment is calculated, wherein the equivalent signal to interference and noise ratio satisfies the following equation: SINRsub=SINRMCS+deltaSINRsub; D, according to the equivalent signal to interference and noise ratio of each sub-band of the user equipment, a modulation and coding strategy MCS in frequency selection scheduling is selected. By using the technical scheme in the invention, under various complex network layout conditions, downlink throughputs of a wideband communication system can be increased.
Description
Technical field
The application relates to wireless communication technology field, particularly relates to a kind of downlink frequency selection scheduling method.
Background technology
LTE system is super three generations (B3G, Beyond Third Generation) wide-band communication system, it provide more large transmission bandwidth and more high transfer rate, due to the increase of transmission bandwidth, the multidiameter delay impact be subject to increases thereupon, and transmission channel embodies frequency selectivity gain in whole bandwidth.In order to make full use of above characteristic, UE cycle (or aperiodic) property ground feedback channel quality can indicate (CQI, Channel Quality Indicator), and base station supports that the CQI reported with UE carries out frequency selective scheduling, maximum system throughput.Because LTE circumstance complication interference variations of arranging net affects the CQI accuracy that UE reports, base station down frequently selection scheduling performance is also affected, and thus throughput of system is also affected.
Summary of the invention
This application provides a kind of downlink frequency selection scheduling method, the downlink throughput capacity of wide-band communication system can be promoted under various complexity arranges net situation.
A kind of downlink frequency selection scheduling method that the embodiment of the present application provides, comprising:
The broadband Signal to Interference plus Noise Ratio SINR of A, base station calculating subscriber equipment
mCS;
The subband differential channel quality of user equipment to report instruction CQI is converted to the Signal to Interference plus Noise Ratio difference DELTA SINR of corresponding subband by B, base station
sub;
The equivalent Signal to Interference plus Noise Ratio of C, each subband of calculating subscriber equipment is SINR
sub=SINR
mCS+ Δ SINR
sub;
D, to select modulation in selection scheduling frequently and coding strategy MCS according to the equivalent Signal to Interference plus Noise Ratio of each subband of subscriber equipment.
Preferably, steps A comprises:
A1, base station side pass ACK/NACK information dynamic conditioning subscriber equipment broadband Signal to Interference plus Noise Ratio SINR according to subscriber equipment head
mCS;
The broadband CQI that A2, base station counting user equipment report, is converted to equivalent SINR thresholding SINR by broadband CQI statistical value
cQI;
A3, judge broadband Signal to Interference plus Noise Ratio SINR
mCSwith equivalent SINR thresholding SINR
cQIvariation tendency whether consistent, if unanimously, proceed to steps A 4, otherwise go to step B;
A4, according to described equivalent SINR thresholding SINR
cQIadjustment broadband Signal to Interference plus Noise Ratio SINR
mCS.
Preferably, steps A 1 comprises: subscriber equipment receives the Physical Downlink Shared Channel information transmitted first, if to this information feed back affirmative acknowledgement ACK, then to current broadband SINR
mCSraise a step up value Δ
up, i.e. SINR
mCS=SINR
mCS+ Δ
up; If to this PDSCH information feed back negative response NACK, then to current broadband SINR
mCSlower a decline step value Δ
down, i.e. SINR
mCS=SINR
mCS-Δ
down, wherein Δ
up/ Δ
down=bler/ (1-bler).
Preferably, described decline step value Δ
downspan be (0,1] dB.
Preferably, steps A 4 is: according to following formula adjustment broadband Signal to Interference plus Noise Ratio SINR
mCS:
SINR
mCS=SINR
mCS× alfa+SINR
cQI× (1-alfa), wherein alfa is filtering factor.
As can be seen from the above technical solutions, subband CQI reflects that frequency domain sub-band channel gain changes relatively, the equivalent Signal to Interference plus Noise Ratio of subband more adequately reflects the interference level of corresponding subband relative to broadband Signal to Interference plus Noise Ratio, thus adapt to transmission channel in wide-band communication system in whole bandwidth, embody the feature of frequency selectivity gain, be adapted at various complexity and arrange net and promote the downlink throughput capacity of wide-band communication system in situation.
Accompanying drawing explanation
The downlink frequency selection scheduling method flow schematic diagram that Fig. 1 provides for the application;
The realization flow schematic diagram of the downlink frequency selection scheduling method that the preferred embodiment that Fig. 2 is the application provides.
Embodiment
There is the CQI accuracy that variable effect UE reports in the downlink frequency selection scheduling method consideration LTE system interference level that the application provides, and acquired subband differential CQI reflection frequency domain sub-band channel gain changes relatively, therefore the broadband CQI designing a kind of statistical tracking UE channel changes, to avoid the impact of external disturbance change on the CQI accuracy that UE reports, report subband differential CQI to carry out frequency selection scheduling in conjunction with UE simultaneously, be adapted at various complexity and arrange net in situation and promote downlink throughput capacity.
The downlink frequency selection scheduling method flow that the application provides as shown in Figure 1, comprises the steps:
Step 101: the broadband Signal to Interference plus Noise Ratio SINR of base station counting user equipment
mCS;
Step 102: the subband differential CQI of user equipment to report is converted to the Signal to Interference plus Noise Ratio difference DELTA SINR of corresponding subband by base station
sub;
Step 103: the equivalent Signal to Interference plus Noise Ratio calculating each subband of subscriber equipment is SINR
sub=SINR
mCS+ Δ SINR
sub;
Step 104: according to the modulation in the equivalent Signal to Interference plus Noise Ratio selection frequency selection scheduling of each subband of subscriber equipment and coding strategy MCS.
For making the know-why of technical scheme, feature and technique effect clearly, below in conjunction with specific embodiment, technical scheme is described in detail.
The realization flow of the downlink frequency selection scheduling method that the preferred embodiment of the application provides as shown in Figure 2, comprises the steps:
Step 201: base station side passes ACK/NACK information dynamic conditioning broadband Signal to Interference plus Noise Ratio SINR according to user head
mCS.
Another embodiment of the application provides a kind of dynamic conditioning broadband Signal to Interference plus Noise Ratio SINR
mCSexecution mode:
User receives Physical Downlink Shared Channel (PDSCH) information transmitted first, if to this information feed back affirmative acknowledgement (ACK), then to current broadband SINR
mCSraise a step up value Δ
up, i.e. SINR
mCS=SINR
mCS+ Δ
up; And if to this PDSCH information feed back negative response NACK, then to current broadband SINR
mCSlower a decline step value Δ
down, i.e. SINR
mCS=SINR
mCS-Δ
down, wherein Δ
up/ Δ
down=bler/ (1-bler).Decline step value Δ
downbetter span be (0,1] dB.
Step 202: the broadband CQI that base station statistics UE reports, is converted to equivalent SINR thresholding SINR by broadband CQI statistical value
cQI.
Cycle (or aperiodic) the broadband CQI that base station side reports UE adds up (can add up the broadband CQI in certain time interval T or add up the N number of broadband CQI reported continuously), converts thereof into the thresholding SINR of corresponding demodulation SINR after obtaining statistical value again
cQI.
Those skilled in the art should know, the thresholding SINR of broadband CQI and demodulation SINR
cQIbetween have the corresponding relation determined.A kind of simple implementation is: the thresholding SINR preserving broadband CQI and demodulation SINR in base station side
cQImapping table, base station side obtains broadband CQI statistical value average out to M in certain time interval T, then inquires about the thresholding SINR that mapping table obtains corresponding demodulation SINR
cQI.
Step 203: judge broadband Signal to Interference plus Noise Ratio SINR
mCSwith equivalent SINR thresholding SINR
cQIvariation tendency whether consistent, if unanimously, i.e. SINR
mCSfor ascendant trend and SINR
cQIbe greater than SINR
mCS, or SINR
mCSfor downward trend and SINR
cQIbe less than SINR
mCSproceed to step 204, otherwise perform step 205.
Step 204: according to described equivalent SINR information adjustment SINR
mCS.
Another embodiment of the application gives a kind of adjustment SINR
mCSspecific implementation: according to following formula adjustment SINR
mCS,
SINR
mCS=SINR
mCS× alfa+SINR
cQI× (1-alfa), wherein alfa is filtering factor, can arrange.
Step 205: according to the SINR of current acquisition
mCSwith the subband differential CQI structure subband SINR that UE reports
mCSfor frequency selection scheduling.Be specially: the poor Δ SINR first subband differential CQI being converted to corresponding Signal to Interference plus Noise Ratio
sub, the equivalent Signal to Interference plus Noise Ratio calculating each subband is afterwards SINR
sub=SINR
mCS+ Δ SINR
sub, select for the MCS in frequency selection scheduling.
The foregoing is only the preferred embodiment of the application; not in order to limit the protection range of the application; within all spirit in technical scheme and principle, any amendment made, equivalent replacements, improvement etc., all should be included within scope that the application protects.
Claims (5)
1. a downlink frequency selection scheduling method, is characterized in that, comprising:
The broadband Signal to Interference plus Noise Ratio SINR of A, base station calculating subscriber equipment
mCS;
The subband differential channel quality of user equipment to report instruction CQI is converted to the Signal to Interference plus Noise Ratio difference DELTA SINR of corresponding subband by B, base station
sub;
The equivalent Signal to Interference plus Noise Ratio of C, each subband of calculating subscriber equipment is SINR
sub=SINR
mCS+ Δ SINR
sub;
D, to select modulation in selection scheduling frequently and coding strategy MCS according to the equivalent Signal to Interference plus Noise Ratio of each subband of subscriber equipment.
2. method according to claim 1, is characterized in that, steps A comprises:
A1, base station side pass ACK/NACK information dynamic conditioning subscriber equipment broadband Signal to Interference plus Noise Ratio SINR according to subscriber equipment head
mCS;
The broadband CQI that A2, base station counting user equipment report, is converted to equivalent SINR thresholding SINR by broadband CQI statistical value
cQI;
A3, judge broadband Signal to Interference plus Noise Ratio SINR
mCSwith equivalent SINR thresholding SINR
cQIvariation tendency whether consistent, if unanimously, proceed to steps A 4, otherwise go to step B;
A4, according to described equivalent SINR thresholding SINR
cQIadjustment broadband Signal to Interference plus Noise Ratio SINR
mCS.
3. method according to claim 2, is characterized in that, steps A 1 comprises: subscriber equipment receives the Physical Downlink Shared Channel information transmitted first, if to this information feed back affirmative acknowledgement ACK, then to current broadband SINR
mCSraise a step up value Δ
up, i.e. SINR
mCS=SINR
mCS+ Δ
up; If to this PDSCH information feed back negative response NACK, then to current broadband SINR
mCSlower a decline step value Δ
down, i.e. SINR
mCS=SINR
mCS-Δ
down, wherein Δ
up/ Δ
down=bler/ (1-bler).
4. method according to claim 3, is characterized in that, described decline step value Δ
downspan be (0,1] dB.
5. method according to claim 2, is characterized in that, steps A 4 is: according to following formula adjustment broadband Signal to Interference plus Noise Ratio SINR
mCS:
SINR
mCS=SINR
mCS× alfa+SINR
cQI× (1-alfa), wherein alfa is filtering factor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410106931.XA CN104936301B (en) | 2014-03-21 | 2014-03-21 | A kind of downlink frequency selection scheduling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410106931.XA CN104936301B (en) | 2014-03-21 | 2014-03-21 | A kind of downlink frequency selection scheduling method |
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|---|---|
| CN104936301A true CN104936301A (en) | 2015-09-23 |
| CN104936301B CN104936301B (en) | 2019-04-26 |
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| CN201410106931.XA Expired - Fee Related CN104936301B (en) | 2014-03-21 | 2014-03-21 | A kind of downlink frequency selection scheduling method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113709813A (en) * | 2021-09-03 | 2021-11-26 | 上海中兴易联通讯股份有限公司 | Method and system for combining NR small base station base bands |
| WO2022012609A1 (en) * | 2020-07-15 | 2022-01-20 | 华为技术有限公司 | Measurement feedback method and apparatus |
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| CN101043291A (en) * | 2006-03-20 | 2007-09-26 | 华为技术有限公司 | Feedback control method, apparatus and transceiver in OFDM system |
| KR20090051998A (en) * | 2007-11-20 | 2009-05-25 | 삼성전자주식회사 | Apparatus and method for reporting channel quality indicator in wireless communication system |
| US20090147865A1 (en) * | 2007-12-07 | 2009-06-11 | Jianzhong Zhang | Uplink feedback for supporting MIMO operation in the LTE downlink |
| JP2010200038A (en) * | 2009-02-25 | 2010-09-09 | Kyocera Corp | Radio base station and radio communication method |
| CN102611666A (en) * | 2011-01-25 | 2012-07-25 | 中国移动通信集团公司 | Outer loop link adaptive implementation method and device |
-
2014
- 2014-03-21 CN CN201410106931.XA patent/CN104936301B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101043291A (en) * | 2006-03-20 | 2007-09-26 | 华为技术有限公司 | Feedback control method, apparatus and transceiver in OFDM system |
| KR20090051998A (en) * | 2007-11-20 | 2009-05-25 | 삼성전자주식회사 | Apparatus and method for reporting channel quality indicator in wireless communication system |
| US20090147865A1 (en) * | 2007-12-07 | 2009-06-11 | Jianzhong Zhang | Uplink feedback for supporting MIMO operation in the LTE downlink |
| JP2010200038A (en) * | 2009-02-25 | 2010-09-09 | Kyocera Corp | Radio base station and radio communication method |
| CN102611666A (en) * | 2011-01-25 | 2012-07-25 | 中国移动通信集团公司 | Outer loop link adaptive implementation method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022012609A1 (en) * | 2020-07-15 | 2022-01-20 | 华为技术有限公司 | Measurement feedback method and apparatus |
| CN113709813A (en) * | 2021-09-03 | 2021-11-26 | 上海中兴易联通讯股份有限公司 | Method and system for combining NR small base station base bands |
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|---|---|
| CN104936301B (en) | 2019-04-26 |
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