CN102186264A - Remote radio unit and remote ratio method - Google Patents
Remote radio unit and remote ratio method Download PDFInfo
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- CN102186264A CN102186264A CN2011100907655A CN201110090765A CN102186264A CN 102186264 A CN102186264 A CN 102186264A CN 2011100907655 A CN2011100907655 A CN 2011100907655A CN 201110090765 A CN201110090765 A CN 201110090765A CN 102186264 A CN102186264 A CN 102186264A
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Abstract
The invention claims a remote radio unit (RRU) and a remote ratio method. The RRU comprises an uplink frequency mixer, a downlink orthogonal modulator, and a local vibration generator which is connected with the uplink frequency mixer and the downlink orthogonal modulator; the uplink frequency mixer is used for receiving an uplink simulative radio frequency signal, performing down-conversion to the uplink simulative radio frequency signal according to the local vibration frequency provided by the local vibration frequency mixer, acquiring an uplink intermediate-frequency simulative signal, and sending the intermediate-frequency simulative signal to an uplink intermediate-frequency band-pass filter; the downlink orthogonal modulator is used for receiving a downlink simulative intermediate-frequency signal, performing up-conversion to the downlink simulative intermediate-frequency signal according to the local vibration frequency provided by the local vibration generator, acquiring a downlink simulative radio frequency signal, and sending the downlink simulative radio frequency signal to a downlink adjustable gain amplifier; and the local vibration generator is used for providing two frequency ranges of local vibration frequency for the uplink frequency mixer and the downlink orthogonal modulator. When the scheme provided by the invention is adopted, the multiplexing of the local vibration generator is realized, and the cost of the RRU is reduced.
Description
Technical field
The present invention relates to mobile communication technology, relate in particular to Remote Radio Unit (RRU, Remote Radio Unit) and radio frequency remote method.
Background technology
At present, in TD-SCDMA system and time-division Long Term Evolution (TD-LTE, Time Division-Long Term Evolution) system etc., RRU commonly used and baseband processing unit (BBU, Base Band Unit) are formed the distributed base station framework.Fig. 1 is existing RRU structural representation.RRU can be placed on any place as required, is the center with a base station, by laying a plurality of RRU, forms the sub-honeycomb net of the single base station of a baseband pool and a plurality of Remote Radio Unit formation, can effectively solve to cover and capacity problem.
Referring to Fig. 1, comprise at least among the existing RRU: upstream mixer 1105, descending quadrature modulator 1111, power splitter 1115, derailing switch 1116, local oscillator generator 1117 and local oscillator generator 1118;
Upstream mixer 1105 is used to receive up analog radio-frequency signal, according to the local frequency that power splitter 1115 provides up analog radio-frequency signal is carried out down-conversion, obtains up analog intermediate frequency signal and sends to up if bandpas filter;
Descending quadrature modulator 1111 is used to receive descending analog if signal, according to the local frequency that power splitter 1115 provides descending analog if signal is carried out up-conversion, obtains descending analog radio-frequency signal and sends to descending variable gain amplifier;
Derailing switch 1116 is used for the frequency range according to the RRU current application, and power splitter 1115 is connected to corresponding local oscillator generator;
Power splitter 1115 is used for the local frequency from local oscillator generator is offered upstream mixer 1105 and descending quadrature modulator 1111.
This RRU is applicable to two frequency ranges, each frequency range has the local frequency of oneself, the up analog radio-frequency signal that local frequency is used for 1105 pairs of receptions of upstream mixer carries out down-conversion, and the descending analog if signal that is used for 1111 pairs of receptions of descending quadrature modulator carries out up-conversion.The frequency range that RRU is suitable for for example is two frequency ranges in the following frequency range: F-band: 1880MHz-1920MHz, A frequency range: 2010MHz-2025MHz, E frequency range: 2300MHz-2400MHz etc.
Suppose that two band tables that RRU is suitable for are shown frequency range A and frequency range B, the local frequency that the corresponding local oscillator generator 1116 of frequency range A provides, the local frequency that the corresponding local oscillator generator 1117 of frequency range B provides; If that the RRU current application is frequency range A, then switch is placed to be connected with local oscillator generator 1116, if that the RRU current application is frequency range section B, then switch is placed to be connected with local oscillator generator 1117.The local frequency that local oscillator generator can provide has certain scope, during practice, selects a frequency to offer upstream mixer 1105 and descending quadrature modulator 1111 through switch 1116 and power splitter 1115 from this scope at random.
The mode that upstream mixer 1105 and descending quadrature modulator 1111 carry out frequency translation has two kinds, and a kind of is low local oscillator mapping mode, and a kind of is high local oscillator mapping mode, and this dual mode passes through following formulate:
Low local oscillator mode: LO+IF=RF;
High local oscillator mode: LO-IF=RF.
Wherein, RF represents radio frequency signal frequency, and IF represents the intermediate-freuqncy signal frequency, and LO represents local frequency; The spectrum diagram of this dual mode is seen Fig. 2 (a) and 2 (b).Suppose that RRU adopts low local oscillator mode to carry out frequency translation, then upstream mixer 1105 receives up analog radio-frequency signal, adopt low local oscillator mode that up analog radio-frequency signal is carried out down-conversion, obtain up analog intermediate frequency signal, the frequency of this up analog intermediate frequency signal is: the frequency that the local frequency that deducts power splitter 1115 and provide with the frequency of up analog radio-frequency signal obtains; Descending quadrature modulator receives descending analog if signal, adopt low local oscillator mode that descending analog if signal is carried out up-conversion, obtain descending analog radio-frequency signal, the frequency of this descending analog radio-frequency signal is: add the frequency that local frequency that power splitter 1115 provides obtains with the frequency of descending analog if signal.
RRU shown in Figure 1 also comprises multi-frequency band radio-frequency band pass filter 1101, circulator 1102, up low noise amplifier (LNA, Low Noise Amplifier) 1103, up radio frequency band filter 1104, up if bandpas filter 1106, up variable gain amplifier 1107, analog to digital converter (ADC, Analog to Digital Converter) 1108, digital to analog converter (DAC, Digital to AnalogConverter) 1109, descending if bandpas filter 1110, descending variable gain amplifier 1112, downlink radio frequency band pass filter 1113 and descending PA1114.
Wherein, multi-frequency band radio-frequency band pass filter 1101 receives the up analog radio-frequency signal from antenna, carry out sending circulator 1102 to after the filtering, and, receive from the descending analog radio-frequency signal of circulator 1102 and send antenna to.
Circulator 1102 receives from the up analog radio-frequency signal of multi-frequency band radio-frequency band pass filter 1101 and sends up LNA 1103 to, and, receive from the descending analog radio-frequency signal of the amplification of descending PA 1114 and send multi-frequency band radio-frequency band pass filter 1101 to.
The up analog radio-frequency signal that up LNA 1103 receives from circulator 1102 sends up radio frequency band filter 1104 to after amplifying.
The up analog radio-frequency signal that up radio frequency band filter 1104 receives from the amplification of up LNA 1103 carries out sending upstream mixer 1105 to after the filtering.
Upstream mixer 1105 is used to receive up analog radio-frequency signal, according to the local frequency that power splitter 1115 provides up analog radio-frequency signal is carried out down-conversion, obtains up analog intermediate frequency signal and sends to up if bandpas filter 1106.
The up analog intermediate frequency signal that up if bandpas filter 1106 receives from upstream mixer 1105 carries out sending up variable gain amplifier 1107 to after the filtering.
The filtered up analog intermediate frequency signal that up variable gain amplifier 1107 receives from up if bandpas filter 1106 carries out sending to ADC 1108 after the gain-adjusted.
The up analog if signal that ADC 1108 receives from up variable gain amplifier 1107 carries out obtaining the upstream digital intermediate-freuqncy signal and sending to baseband processing unit after the analog-to-digital conversion.
DAC1109 receives the descending digital medium-frequency signal from baseband processing unit, carries out obtaining descending analog if signal and sending to descending if bandpas filter 1110 after the digital-to-analogue conversion.
The descending analog if signal that descending if bandpas filter 1110 receives from DAC 1109 carries out sending descending quadrature modulator 1111 to after the filtering.
Descending quadrature modulator 1111 is used to receive descending analog if signal, according to the local frequency that power splitter 1115 provides descending analog if signal is carried out up-conversion, obtains descending analog radio-frequency signal and sends to descending variable gain amplifier 1112.
The descending analog radio-frequency signal that descending variable gain amplifier 1112 receives from descending quadrature modulator 1111 carries out sending to downlink radio frequency band pass filter 1113 after the gain-adjusted.
Downlink radio frequency band pass filter 1113 receives from the descending analog radio-frequency signal after the gain-adjusted of descending variable gain amplifier 1112, carries out sending descending PA1114 to after the filtering.
Descending PA1114 receives the filtered descending analog radio-frequency signal from downlink radio frequency band pass filter 1113, sends circulator 1102 after amplifying to.
Existing scheme is provided with two local oscillator generators in RRU, and in conjunction with derailing switch and power splitter, two frequency ranges that are suitable for for RRU provide local frequency respectively, and it is embodied as high.
Summary of the invention
The invention provides a kind of RRU, this RRU can realize the multiplexing of local oscillator generator, reduces the cost of RRU.
The invention provides a kind of radio frequency remote method, this method can realize the multiplexing of local oscillator generator, reduces the cost of RRU.
A kind of RRU, this RRU comprise upstream mixer, descending quadrature modulator, and a local oscillator generator that is connected with described descending quadrature modulator with described upstream mixer respectively;
Described upstream mixer is used to receive up analog radio-frequency signal, according to the local frequency that local oscillator generator provides up analog radio-frequency signal is carried out down-conversion, obtains up analog intermediate frequency signal and sends to up if bandpas filter;
Described descending quadrature modulator is used to receive descending analog if signal, according to the local frequency that local oscillator generator provides descending analog if signal is carried out up-conversion, obtains descending analog radio-frequency signal and sends to descending variable gain amplifier;
Described local oscillator generator is used to upstream mixer and descending quadrature modulator that the local frequency of two frequency ranges is provided; Being defined as of described local oscillator generator: low-frequency range is adopted high local oscillator mode, high band is adopted low local oscillator mode, calculate the local frequency scope of two frequency ranges respectively, whether the local oscillator scope of judging two frequency ranges is identical or approximate, if the local oscillator generator of local frequency scope of then selecting to comprise described two frequency ranges is as the local oscillator generator of described Remote Radio Unit.
A kind of radio frequency remote method, this method adopts high local oscillator mode, high band is adopted low local oscillator mode low-frequency range, calculate the local frequency scope of two suitable frequency ranges of Remote Radio Unit respectively, whether the local oscillator scope of judging two frequency ranges is identical or approximate, if the local oscillator generator of local frequency scope of then selecting to comprise described two frequency ranges is as the local oscillator generator of described Remote Radio Unit; This method comprises:
Upstream mixer receives up analog radio-frequency signal, and the local frequency signal that provides according to local oscillator generator carries out down-conversion to up analog radio-frequency signal, obtains up analog intermediate frequency signal and sends to up if bandpas filter;
Descending quadrature modulator receives descending analog if signal, according to the local frequency that local oscillator generator provides descending analog if signal is carried out up-conversion, obtains descending analog radio-frequency signal and sends to descending variable gain amplifier.
From such scheme as can be seen, the present invention has replaced power splitter, derailing switch and two local oscillator generators among the prior art RRU with a local oscillator generator, has realized the multiplexing of local oscillator generator, has reduced the cost of RRU.
Description of drawings
Fig. 1 is the structural representation of existing RRU;
Fig. 2 a is the spectrum diagram of high local oscillator conversion among the RRU;
Fig. 2 b is the spectrum diagram of low local oscillator conversion among the RRU;
Fig. 3 is the structural representation of RRU of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
The present invention has replaced power splitter, derailing switch and two local oscillator generators among the prior art RRU with a local oscillator generator, has realized the multiplexing of local oscillator generator, thereby, reduce the cost of RRU.Referring to Fig. 3, be the structural representation of RRU of the present invention, this RRU comprises at least: upstream mixer 2105, descending quadrature modulator 2111 with and a local oscillator generator 2115 being connected with descending quadrature modulator 2111 with upstream mixer 2105 respectively;
Descending quadrature modulator 2111 is used to receive descending analog if signal, according to the local frequency that local oscillator generator 2115 provides descending analog if signal is carried out up-conversion, obtains descending analog radio-frequency signal and sends to descending variable gain amplifier;
The present invention provides local frequency with a local oscillator generator for two frequency ranges, when selecting local oscillator generator 2115: for the local frequency scope of the local frequency scope that makes low-frequency range and high band close as far as possible, low-frequency range is adopted high local oscillator mode, high band is adopted low local oscillator mode, calculate the local frequency scope of two frequency ranges respectively; Whether the local oscillator scope of judging two frequency ranges then is identical or approximate, if the local oscillator generator of local frequency scope of then selecting to comprise described two frequency ranges is as the local oscillator generator 2115 of described Remote Radio Unit.
Whether the local oscillator scope of judging two frequency ranges is identical or approximate, can be specially: deduct minimum local frequency with the highest local frequency in the local oscillator scope of two frequency ranges, obtain subtraction value, if subtraction value is less than set point, then the local oscillator scope of two frequency ranges is identical or approximate, otherwise the local oscillator scope of two frequency ranges is inequality or approximate.
Low local oscillator mode and high local oscillator mode can adopt following formulate:
Low local oscillator mode: LO+IF=RF;
High local oscillator mode: LO-IF=RF.
Wherein, RF represents radio frequency signal frequency, and IF represents the intermediate-freuqncy signal frequency, and LO represents local frequency; The spectrum diagram of this dual mode is seen Fig. 2 (a) and 2 (b).
Be used to judge the whether identical or approximate set point of local oscillator scope of two frequency ranges, can be according to the actual conditions setting, usually, the highest frequency in the local oscillator scope that local oscillator generator can provide and the difference of low-limit frequency are less than 200MHZ, therefore, this set point can be taken as 200MHZ.
For example, for the A frequency range of TD-SCDMA: 2010MHz-2025MHz and E frequency range: 2300MHz-2400MHz, the intermediate-freuqncy signal frequency IF of these two frequency range correspondences is identical, is 138.24MHz; The A frequency range is adopted high local oscillator mode, calculate its local frequency scope: 2148.24MHz-2163.24MHz, the E frequency range is adopted low local oscillator mode, calculate its local frequency scope: 2161.76MHz-2261.76MHz; These two frequency ranges are 2148.24MHz-2261.76MHz to the range of needs of local frequency, and the difference of highest frequency and low-limit frequency is 113.52MHz only, and less than 200MHz, existing local oscillator generator can satisfy this demand.
RRU shown in Figure 3 also comprises multi-frequency band radio-frequency band pass filter 2101, circulator 2102, up LNA2103, up radio frequency band filter 2104, up if bandpas filter 2106, up variable gain amplifier 2107, ADC2108, DAC2109, descending if bandpas filter 2210, descending variable gain amplifier 2112, downlink radio frequency band pass filter 2113 and descending PA2114.
Wherein, multi-frequency band radio-frequency band pass filter 2101 receives the up analog radio-frequency signal from antenna, carry out sending circulator 2102 to after the filtering, and, receive from the descending analog radio-frequency signal of circulator 2102 and send antenna to.
Circulator 2102 receives from the up analog radio-frequency signal of multi-frequency band radio-frequency band pass filter 2101 and sends up LNA 2103 to, and, receive from the descending analog radio-frequency signal of the amplification of descending PA 2114 and send multi-frequency band radio-frequency band pass filter 2101 to.
The up analog radio-frequency signal that up LNA 2103 receives from circulator 2102 sends up radio frequency band filter 2104 to after amplifying.
The up analog radio-frequency signal that up radio frequency band filter 2104 receives from the amplification of up LNA 2103 carries out sending upstream mixer 2105 to after the filtering.
The up analog intermediate frequency signal that up if bandpas filter 2106 receives from upstream mixer 2105 carries out sending up variable gain amplifier 2107 to after the filtering.
The filtered up analog intermediate frequency signal that up variable gain amplifier 2107 receives from up if bandpas filter 2106 carries out sending to ADC 2108 after the gain-adjusted.
The up analog if signal that ADC 2108 receives from up variable gain amplifier 2107 carries out obtaining the upstream digital intermediate-freuqncy signal and sending to baseband processing unit after the analog-to-digital conversion.
DAC2109 receives the descending digital medium-frequency signal from baseband processing unit, carries out obtaining descending analog if signal and sending to descending if bandpas filter 2110 after the digital-to-analogue conversion.
The descending analog if signal that descending if bandpas filter 2110 receives from DAC2109 carries out sending descending quadrature modulator 2111 to after the filtering.
The descending analog radio-frequency signal that descending variable gain amplifier 2112 receives from descending quadrature modulator 2111 carries out sending to downlink radio frequency band pass filter 2113 after the gain-adjusted.
Downlink radio frequency band pass filter 2113 receives from the descending analog radio-frequency signal after the gain-adjusted of descending variable gain amplifier 2112, carries out sending descending PA2114 to after the filtering.
Descending PA2114 receives the filtered descending analog radio-frequency signal from downlink radio frequency band pass filter 2113, sends circulator 2102 after amplifying to.
The present invention also provides and has adopted the Remote Radio Unit of Fig. 3 to carry out the method that radio frequency zooms out, this method adopts high local oscillator mode, high band is adopted low local oscillator mode low-frequency range, calculate the local frequency scope of two suitable frequency ranges of Remote Radio Unit respectively, whether the local oscillator scope of judging two frequency ranges is identical or approximate, if the local oscillator generator of local frequency scope of then selecting to comprise described two frequency ranges is as the local oscillator generator of described Remote Radio Unit; This method comprises:
Upstream mixer receives up analog radio-frequency signal, and the local frequency signal that provides according to local oscillator generator carries out down-conversion to up analog radio-frequency signal, obtains up analog intermediate frequency signal and sends to up if bandpas filter;
Descending quadrature modulator receives descending analog if signal, according to the local frequency that local oscillator generator provides descending analog if signal is carried out up-conversion, obtains descending analog radio-frequency signal and sends to descending variable gain amplifier.
The following formulate of described low local oscillator mode: LO+IF=RF; The following formulate of described high local oscillator mode: LO-IF=RF;
Wherein, RF represents radio frequency signal frequency, and IF represents the intermediate-freuqncy signal frequency, and LO represents local frequency.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (6)
1. a Remote Radio Unit is characterized in that, described Remote Radio Unit comprises upstream mixer, descending quadrature modulator, and a local oscillator generator that is connected with described descending quadrature modulator with described upstream mixer respectively;
Described upstream mixer is used to receive up analog radio-frequency signal, according to the local frequency that local oscillator generator provides up analog radio-frequency signal is carried out down-conversion, obtains up analog intermediate frequency signal and sends to up if bandpas filter;
Described descending quadrature modulator is used to receive descending analog if signal, according to the local frequency that local oscillator generator provides descending analog if signal is carried out up-conversion, obtains descending analog radio-frequency signal and sends to descending variable gain amplifier;
Described local oscillator generator is used to upstream mixer and descending quadrature modulator that the local frequency of two frequency ranges is provided; Being defined as of described local oscillator generator: low-frequency range is adopted high local oscillator mode, high band is adopted low local oscillator mode, calculate the local frequency scope of two frequency ranges respectively, whether the local oscillator scope of judging two frequency ranges is identical or approximate, if the local oscillator generator of local frequency scope of then selecting to comprise described two frequency ranges is as the local oscillator generator of described Remote Radio Unit.
2. Remote Radio Unit as claimed in claim 1, it is characterized in that described Remote Radio Unit also comprises multi-frequency band radio-frequency band pass filter, circulator, up low noise amplifier LNA, up radio frequency band filter, up if bandpas filter, up variable gain amplifier and ADC;
The multi-frequency band radio-frequency band pass filter is used to receive the up analog radio-frequency signal from antenna, carries out sending circulator to after the filtering;
Circulator is used to receive from the up analog radio-frequency signal of multi-frequency band radio-frequency band pass filter and sends up LNA to;
Up LNA is used to receive the up analog radio-frequency signal from circulator, sends up radio frequency band filter after amplifying to;
Up radio frequency band filter is used to receive the up analog radio-frequency signal from the amplification of up LNA, carries out sending upstream mixer to after the filtering;
Up if bandpas filter is used to receive the up analog intermediate frequency signal from upstream mixer, carries out sending up variable gain amplifier to after the filtering;
Up variable gain amplifier is used to receive the filtered up analog intermediate frequency signal from up if bandpas filter, carries out sending to analog to digital converter ADC after the gain-adjusted;
ADC is used to receive the up analog if signal from up variable gain amplifier, carries out obtaining the upstream digital intermediate-freuqncy signal and sending to baseband processing unit after the analog-to-digital conversion.
3. system as claimed in claim 2 is characterized in that, this system also comprises digital to analog converter DAC, descending if bandpas filter, descending variable gain amplifier, downlink radio frequency band pass filter and downlink power amplifier PA;
Digital to analog converter DAC is used to receive the descending digital medium-frequency signal from baseband processing unit, carries out obtaining descending analog if signal and sending to descending if bandpas filter after the digital-to-analogue conversion;
Descending if bandpas filter is used to receive the descending analog if signal from DAC, carries out sending descending quadrature modulator to after the filtering;
Descending variable gain amplifier is used to receive the descending analog radio-frequency signal from descending quadrature modulator, carries out sending to the downlink radio frequency band pass filter after the gain-adjusted;
The downlink radio frequency band pass filter is used to receive the descending analog radio-frequency signal from after the gain-adjusted of descending variable gain amplifier, carries out sending descending PA to after the filtering;
Descending PA is used to receive the filtered descending analog radio-frequency signal from the downlink radio frequency band pass filter, sends circulator to after amplifying;
Circulator also is used to receive from the descending analog radio-frequency signal of the amplification of descending PA and sends the multi-frequency band radio-frequency band pass filter to;
The multi-frequency band radio-frequency band pass filter also is used to receive from the descending analog radio-frequency signal of circulator and sends antenna to.
4. one kind is used the described Remote Radio Unit of claim 1 to carry out the method that radio frequency zooms out, it is characterized in that, low-frequency range is adopted high local oscillator mode, high band is adopted low local oscillator mode, calculate the local frequency scope of two suitable frequency ranges of Remote Radio Unit respectively, whether the local oscillator scope of judging two frequency ranges is identical or approximate, if the local oscillator generator of local frequency scope of then selecting to comprise described two frequency ranges is as the local oscillator generator of described Remote Radio Unit; This method comprises:
Upstream mixer receives up analog radio-frequency signal, and the local frequency signal that provides according to local oscillator generator carries out down-conversion to up analog radio-frequency signal, obtains up analog intermediate frequency signal and sends to up if bandpas filter;
Descending quadrature modulator receives descending analog if signal, according to the local frequency that local oscillator generator provides descending analog if signal is carried out up-conversion, obtains descending analog radio-frequency signal and sends to descending variable gain amplifier.
5. method as claimed in claim 4 is characterized in that, the following formulate of described low local oscillator mode: LO+IF=RF; The following formulate of described high local oscillator mode: LO-IF=RF;
Wherein, RF represents radio frequency signal frequency, and IF represents the intermediate-freuqncy signal frequency, and LO represents local frequency.
6. as claim 4 or 5 described methods, it is characterized in that, whether the described local oscillator scope of judging two frequency ranges identical or approximate comprising: deduct minimum local frequency with the highest local frequency in the local oscillator scope of two frequency ranges, obtain subtraction value, if subtraction value is less than set point, then the local oscillator scope of two frequency ranges is identical or approximate, otherwise the local oscillator scope of two frequency ranges is inequality or approximate.
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| CN102932029A (en) * | 2012-09-20 | 2013-02-13 | 中国联合网络通信集团有限公司 | Long term evolution (LTE) indoor distribution system and double-path frequency conversion equipment and method thereof |
| CN103107966A (en) * | 2013-01-16 | 2013-05-15 | 华为技术有限公司 | Method, device and base station system for radio-frequency signal transceiving |
| CN104219020A (en) * | 2013-05-31 | 2014-12-17 | 中兴通讯股份有限公司 | Method and system for processing IQ data of radio-frequency remote unit and radio remote unit |
| CN105577123A (en) * | 2015-12-17 | 2016-05-11 | 北京锐安科技有限公司 | Up-conversion circuit |
| US9432063B2 (en) | 2013-01-16 | 2016-08-30 | Huawei Technologies Co., Ltd. | Radio frequency signal transceiving and processing method, device, and base station system |
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Application publication date: 20110914 |