CN103220682A - Antenna selection method and device in data transmission process - Google Patents
Antenna selection method and device in data transmission process Download PDFInfo
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- CN103220682A CN103220682A CN2012100168357A CN201210016835A CN103220682A CN 103220682 A CN103220682 A CN 103220682A CN 2012100168357 A CN2012100168357 A CN 2012100168357A CN 201210016835 A CN201210016835 A CN 201210016835A CN 103220682 A CN103220682 A CN 103220682A
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Abstract
The invention provides an antenna selection method and device in the data transmission process. According to the quality of received signals, antennas for sending data and receiving data are selected. The antenna selection method and device can ensure transmission performance of a system.
Description
Technical field
The present invention relates to the data transmission technology in the mobile communication system, antenna selecting method when particularly relating to transfer of data and device.
Background technology
In communication system, can adopt the scheme of distributed Base Band Unit (BBU)+wireless remote unit (RRU) to carry out networking.The number of RRU can be adjusted according to the footprint size of single subdistrict.Specific embodiment is referring to accompanying drawing 1.Comprise 4 RRU under a BBU in the accompanying drawing 1, the covering of different RRUs belongs to same sub-district.Like this, compare, just can enlarge the coverage of single subdistrict, and then can reduce the switching times of UE, reduce cutting off rate, increase user's communications and experience with the networking plan of single RRU.Simultaneously, owing to reduce the number used BBU, the also cost that can reduce to arrange net for operator.
For the UE in the high-speed railway communication system, because the high-speed mobile of train, correspondingly the translational speed of UE is very fast, in the identical time, therefore UE need pass through a plurality of different sub-districts, needs frequent carry out Cell searching and switching, to guarantee the continuous communiction of UE.Distributed BBU+RRU scheme is particularly useful in the private network communication system, for example aims at the high ferro private network communication system that the telex network demand on the train is set up.The number of RRU under BBU can be selected as required.
For the wireless channel of high-speed railway communication system, because the construction of train rail does not have bigger radian, and openr around the railway, so the transmission of wireless signal is mostly based on direct projection directly.Like this, for base station and UE, when transfer of data, use single antenna to carry out transfer of data and be better than the mode of using multi-antenna emission diversity.Therefore, UE can select one in the sectorized antennas to carry out transmission of uplink data; The base station can select the part antenna of part RRU or RRU to carry out the transmission of downlink data.
At present, when selecting antenna to transmit, UE adopts the mode of selecting at random to realize usually, and the mode that this is selected at random and not being suitable in the high ferro communication system.Main cause is, owing to the high-speed mobile of UE, its different antennae sends data to the time that reaches the base station different RRUs, and also the possibility gap is bigger, like this in the high ferro communication system, use different antennas can cause the path loss difference of signal, and then influence the quality of received signal.The antenna that the mode that employing is selected is at random selected to be used to send then can't be guaranteed the transmission performance of selected antenna, thereby can not guarantee the transmission performance of uplink and downlink.
Summary of the invention
In view of this, antenna selecting method and device when main purpose of the present invention is to provide a kind of transfer of data can be guaranteed the transmission performance of system.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
Antenna selecting method during a kind of transfer of data, this method may further comprise the steps:
When the network equipment need carry out the transmission of data,, select to be used to send the antenna of data according to the quality of received signal.
Antenna selection apparatus during a kind of transfer of data is characterized in that this device comprises:
The antenna selected cell is used for when the network equipment need carry out the transmission of data, according to the quality of received signal, selects to be used to send the antenna of data.
In sum, antenna selecting method and device that the present invention proposes by according to received signal quality, select to be used to send the antenna of data and reception data, can guarantee the transmission performance of system.
Description of drawings
Fig. 1 is a distributed BBU+RRU networking schematic diagram in the prior art;
Fig. 2 is the method flow schematic diagram of the embodiment of the invention one;
Fig. 3 is the apparatus structure schematic diagram of the embodiment of the invention one;
Fig. 4 belongs to the sight schematic diagram of same sub-district for the received signal of the different sectorized antennas of UE;
Fig. 5 belongs to the sight schematic diagram of different districts for the received signal of the different sectorized antennas of UE.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Core concept of the present invention is: for the base station, select the part antenna of part RRU or RRU to carry out the transmission of downlink data, can reduce the energy consumption of network, and then reach energy-conservation effect, can control the interference to neighbor cell simultaneously.For UE, its different antennae sends data to the time that reaches the base station different RRUs, and also the possibility gap is bigger, like this, uses different antennas can cause the path loss difference of signal, and then influences the quality of received signal.Based on above-mentioned consideration, the present invention will carry out the selection of antenna according to the received signal quality of antenna.So, transmission can be guaranteed, thereby the transmission performance of system can be guaranteed at the good enterprising line data of antenna of transmission performance.
Fig. 2 is the schematic flow sheet of the embodiment of the invention one, and as shown in Figure 2, this method mainly comprises:
This step is when specific implementation, and the antenna that the selective reception signal quality is good is used for the transmission and the reception of data, to guarantee reliability of data transmission, improves data transmission performance.
Preferably, when the network equipment (being base station or UE) in the time that the transmission of data need being carried out, select to be used to send the antenna of data according to the received signal quality of last subframe; When the network equipment need carry out the reception of data, select to be used to receive the antenna of data according to the received signal quality of current subframe, further, in order to reduce the processing delay of hardware, also can select to be used to receive the antenna of data based on the received signal quality of last descending sub frame.
In actual applications, when the described network equipment is UE, the received signal that the received signal that can distinguish the different sectorized antennas of UE belongs to the different sectorized antennas of sight of same sub-district (as shown in Figure 4) and UE belongs to the sight (as shown in Figure 5) of different districts, realize the selection of described antenna, concrete grammar is as follows:
1) select to be used to send data antenna concrete grammar can for:
As shown in Figure 4, when the received signal of the different sectorized antennas of described UE belonged to same sub-district, described UE can adopt following three kinds of methods to select to be used to send the antenna of data.
Method one: described UE selects the best conduct of measurement result of the received signal of antenna to be used to send the antenna of data from transmitting antenna.
Method two: described UE judges that whether the difference of measurement result of received signal of the measurement result of received signal of other transmitting antennas except that the current antenna that is used to send data and the current antenna that is used to send data is greater than presetting first threshold, if, the best current antenna that is used to send data of conduct of the measurement result of selective reception signal from described other transmitting antennas then, otherwise, the current antenna that is used to send data is not changed.
Method three: described UE judges whether other transmitting antennas except that the current antenna that is used to send data satisfy pre-conditioned, if, the best current antenna that is used to send data of conduct of the measurement result of selective reception signal from the transmitting antenna that satisfies described condition then, otherwise, the current antenna that is used to send data is not changed, describedly pre-conditionedly be: the measurement result of the received signal of this antenna is better than the measurement result of the received signal of the current antenna that is used to send data, and the duration reaches the second default threshold value.
As shown in Figure 5, when the received signal of the different sectorized antennas of described UE belongs to different sub-district, the antenna that described selection is used for sending is: described UE selects to belong to the reception antenna of its current persistent district as the described antenna that is used to send data from described transmitting antenna.
2) select to be used to receive data antenna concrete grammar can for:
When the received signal of the different sectorized antennas of described UE belonged to same sub-district, the antenna that described selection is used for receiving data is: described UE was from described reception antenna, and the antenna of selective reception signal energy maximum is as the antenna that is used to receive data; Perhaps all described reception antennas are defined as being used to receive the antenna of data.
Here need to prove, when all described reception antennas are defined as being used to receive the antenna of data, in follow-up data demodulation process, can adopt following method to receive the demodulation of data:
Described UE is with the ratio of the signal to noise ratio of the described reception antenna merging ratio as aerial signal, the received signal of described reception antenna is merged, with the received signal after merging as carrying out the demodulated received signal; Perhaps, described UE respectively with the received signal of described reception antenna as being used to carry out the demodulated received signal, and carry out corresponding demodulation, from the correct result of described demodulation, select one as current reception data.
When the received signal of the different sectorized antennas of described UE belonged to different sub-district, the antenna that described selection is used to receive data was: the reception antenna that described UE will belong to its current persistent district is defined as being used to receive the antenna of data.
Here, for the upstream data transmission of UE, before switching, use the sectorized antennas of pointing to present sub-district to carry out transmission of uplink data; After switching, use the sectorized antennas of pointing to the another one sub-district to carry out transmission of uplink data.Like this,, and guaranteed the signal quality of switching cell, therefore guaranteed success rate for switching because the overlapping region of two sub-districts is bigger.
In actual applications, when the described network equipment was the base station, the antenna that described selection is used to send data is: the transmitting antenna of the described RRU of described base station selected upstream data. signals energy maximum was defined as being used to send the antenna of data.
The antenna that described selection is used to receive data is: the reception antenna of the RRU of described base station selected received signal energy maximum is as the antenna that is used to receive data; Perhaps, select the reception antenna of all RRU of described base station as being used to receive the antenna of data.
Here, when the reception antenna conduct of all RRU that select the base station is used to receive the antenna of data, can adopt following two kinds of methods to receive the demodulation of data:
Described base station is with the ratio of the signal to noise ratio of current all RRU merging ratio as aerial signal, the received signal of described RRU is merged, with the received signal after merging as carrying out the demodulated received signal; Perhaps, the received signal of each RRU respectively as being used to carry out the demodulated received signal, and is carried out corresponding demodulation, from the correct result of described demodulation, select one as current reception data.
By technique scheme as can be seen, the embodiment of the invention one is to select the measured antenna of matter to carry out the sending and receiving of data according to signal receiving quality as far as possible, so can guarantee the performance of transfer of data.Need to prove, in actual applications,, can carry out multi-user's scheduling, to guarantee in single subframe, the having only data of unique user to send and receive by the mode of time-division for a plurality of users of a sub-district.
In addition, private network communication system for high-speed railway, UE can be the onboard system on the train (be that passenger and onboard system on the train carries out information interaction, information interaction is carried out in onboard system and railway base station along the line), and its sectorized antennas is the antenna that train exterior is installed.
Antenna selection apparatus when Fig. 3 is a kind of transfer of data, this device mainly comprises as shown in Figure 3:
The antenna selected cell is used for according to received signal quality, selecting the antenna that is used to send data and receives data when the network equipment need carry out the transmission of data and receive.
Preferably, described antenna selected cell is further used for when the network equipment need carry out the transmission of data, according to the received signal quality of last subframe, selects to be used to send the antenna of data.
Preferably, described antenna selected cell is further used for when the network equipment need carry out the reception of data, according to the received signal quality of current subframe or last subframe, selects to be used to receive the antenna of data.
Preferably, it is under the situation of UE that described antenna selected cell can be further used at the described network equipment, when the received signal of the different sectorized antennas of described UE belongs to different districts, from described transmitting antenna, select to belong to the reception antenna of its current persistent district as the described antenna that is used to send data; When the received signal of the different sectorized antennas of described UE belongs to same sub-district, from transmitting antenna, select the best conduct of measurement result of the received signal of antenna to be used to send the antenna of data; Perhaps, whether the difference of measurement result of received signal of judging the measurement result of received signal of other transmitting antennas except that the current antenna that is used to send data and the current antenna that is used to send data is greater than presetting first threshold, if, the best current antenna that is used to send data of conduct of the measurement result of selective reception signal from described other transmitting antennas then, otherwise, the current antenna that is used to send data is not changed; Perhaps, judge whether other transmitting antennas except that the current antenna that is used to send data satisfy pre-conditioned, if, then from the transmitting antenna that satisfies described condition, the current antenna that is used to send data of conduct that the measurement result of selective reception signal is best, otherwise, the current antenna that is used to send data is not changed, describedly pre-conditionedly be: the measurement result of the received signal of this antenna is better than the measurement result of the received signal of the current antenna that is used to send data, and the duration reaches the second default threshold value.
Preferably, described antenna selected cell can be further used for being specially under the situation of UE at the described network equipment, when the received signal of the different sectorized antennas of described UE belongs to different districts, the reception antenna that will belong to its current persistent district is defined as being used to receive the antenna of data, when the received signal of the different sectorized antennas of described UE belongs to same sub-district, from described reception antenna, the antenna of selective reception signal energy maximum is as the antenna that is used to receive data; Perhaps, with all described reception antennas of described UE as the antenna that is used to receive data.
Preferably, described antenna selected cell can be further used for being specially under the situation of base station at the described network equipment, the transmitting antenna of the described RRU of selection upstream data. signals energy maximum is as the antenna that is used to send data, the reception antenna of the RRU of selective reception signal energy maximum is as the antenna that is used to receive data, perhaps, select the reception antenna of all RRU of described base station as being used to receive the antenna of data.
In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. the antenna selecting method a during transfer of data is characterized in that this method may further comprise the steps:
When the network equipment need carry out the transmission of data and receive,, select the antenna that is used to send data and receives data according to received signal quality.
2. method according to claim 1 is characterized in that, described method further comprises:
The described network equipment is user terminal UE;
When the received signal of the different sectorized antennas of described UE belongs to different districts, the antenna that described selection is used for sending data is: described UE selects to belong to the reception antenna of its current persistent district as the described antenna that is used to send data from described transmitting antenna;
When the received signal of the different sectorized antennas of described UE belonged to same sub-district, the antenna that described selection is used to send data was:
Described UE selects the best conduct of measurement result of the received signal of antenna to be used to send the antenna of data from transmitting antenna; Perhaps
Described UE judges that whether the difference of measurement result of received signal of the measurement result of received signal of other transmitting antennas except that the current antenna that is used to send data and the current antenna that is used to send data is greater than presetting first threshold, if, the best current antenna that is used to send data of conduct of the measurement result of selective reception signal from described other transmitting antennas then, otherwise, the current antenna that is used to send data is not changed; Perhaps
Described UE judges whether other transmitting antennas except that the current antenna that is used to send data satisfy pre-conditioned, if, the best current antenna that is used to send data of conduct of the measurement result of selective reception signal from the transmitting antenna that satisfies described condition then, otherwise, the current antenna that is used to send data is not changed, describedly pre-conditionedly be: the measurement result of the received signal of this antenna is better than the measurement result of the received signal of the current antenna that is used to send data, and the duration reaches the second default threshold value.
3. method according to claim 1 is characterized in that, described method further comprises:
The described network equipment is user terminal UE;
When the received signal of the different sectorized antennas of described UE belonged to different districts, the antenna that described selection is used to receive data was: the reception antenna that described UE will belong to its current persistent district is defined as being used to receive the antenna of data;
When the received signal of the different sectorized antennas of described UE belonged to same sub-district, the antenna that described selection is used to receive data was:
Described UE is from described reception antenna, and the antenna of selective reception signal energy maximum is as the antenna that is used to receive data; Perhaps,
Described UE with all described reception antennas as the antenna that is used to receive data.
4. method according to claim 1 is characterized in that, described method further comprises:
The described network equipment is the base station, and the antenna that described selection is used to send data is:
The transmitting antenna of the described RRU of described base station selected upstream data. signals energy maximum is as the antenna that is used to send data;
The antenna that described selection is used to receive data is:
The reception antenna of the RRU of described base station selected received signal energy maximum is as the antenna that is used to receive data; Perhaps, select the reception antenna of all RRU of described base station as being used to receive the antenna of data.
5. method according to claim 1 is characterized in that,
When the network equipment need carry out the transmission of data,, select to be used to send the antenna of data according to the received signal quality of last subframe.
6. method according to claim 1 is characterized in that,
When the network equipment need carry out the reception of data,, select to be used to receive the antenna of data according to the received signal quality of current subframe or last subframe.
7. the antenna selection apparatus a during transfer of data is characterized in that this device comprises:
The antenna selected cell is used for according to received signal quality, selecting the antenna that is used to send data and receives data when the network equipment need carry out the transmission of data and receive.
8. device according to claim 7, it is characterized in that, it is under the situation of user terminal UE that described antenna selected cell is further used at the described network equipment, when the received signal of the different sectorized antennas of described UE belongs to different districts, from described transmitting antenna, select to belong to the reception antenna of its current persistent district as the described antenna that is used to send data; When the received signal of the different sectorized antennas of described UE belongs to same sub-district, from transmitting antenna, select the best conduct of measurement result of the received signal of antenna to be used to send the antenna of data; Perhaps, whether the difference of measurement result of received signal of judging the measurement result of received signal of other transmitting antennas except that the current antenna that is used to send data and the current antenna that is used to send data is greater than presetting first threshold, if, the best current antenna that is used to send data of conduct of the measurement result of selective reception signal from described other transmitting antennas then, otherwise, the current antenna that is used to send data is not changed; Perhaps, judge whether other transmitting antennas except that the current antenna that is used to send data satisfy pre-conditioned, if, the best current antenna that is used to send data of conduct of the measurement result of selective reception signal from the transmitting antenna that satisfies described condition then, otherwise, the current antenna that is used to send data is not changed, describedly pre-conditionedly be: the measurement result of the received signal of this antenna is better than the measurement result of the received signal of the current antenna that is used to send data, and the duration reaches the second default threshold value.
9. device according to claim 7, it is characterized in that, it is under the situation of UE that described antenna selected cell is further used at the described network equipment, when the received signal of the different sectorized antennas of described UE belongs to different sub-district, the reception antenna that will belong to its current persistent district is defined as being used to receive the antenna of data, when the received signal of the different sectorized antennas of described UE belongs to same sub-district, from described reception antenna, the antenna of selective reception signal energy maximum is as the antenna that is used to receive data; Perhaps, with all described reception antennas of described UE as the antenna that is used to receive data.
10. device according to claim 7, it is characterized in that, it is under the situation of base station that described antenna selected cell is further used at the described network equipment, the transmitting antenna of the described RRU of selection upstream data. signals energy maximum is as the antenna that is used to send data, the reception antenna of the RRU of selective reception signal energy maximum is as the antenna that is used to receive data, perhaps, select the reception antenna of all RRU of described base station as being used to receive the antenna of data.
11. device according to claim 7 is characterized in that, described antenna selected cell is further used for when the network equipment need carry out the transmission of data, according to the received signal quality of last subframe, selects to be used to send the antenna of data.
12. device according to claim 7 is characterized in that, described antenna selected cell is further used for when the network equipment need carry out the reception of data, according to the received signal quality of current subframe or last subframe, selects to be used to receive the antenna of data.
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| CN201210016835.7A CN103220682B (en) | 2012-01-18 | 2012-01-18 | Antenna selecting method when transfer of data and device |
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| CN201210016835.7A CN103220682B (en) | 2012-01-18 | 2012-01-18 | Antenna selecting method when transfer of data and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105407506A (en) * | 2014-09-16 | 2016-03-16 | 成都鼎桥通信技术有限公司 | RRU uplink data receiving and processing method and apparatus |
| WO2018145529A1 (en) * | 2017-02-10 | 2018-08-16 | 京信通信系统（中国）有限公司 | Data transmission method and device |
| WO2021204097A1 (en) * | 2020-04-05 | 2021-10-14 | Transferfi Pte. Ltd. | Channel learning and power transmission in wireless power networks |
| CN115103426A (en) * | 2022-06-10 | 2022-09-23 | 中信科移动通信技术股份有限公司 | Energy-saving control method and device for indoor multi-mode base station |
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| CN1322413A (en) * | 1998-12-21 | 2001-11-14 | 诺基亚网络有限公司 | Data transmission method and radio system |
| CN101867945A (en) * | 2010-05-31 | 2010-10-20 | 北京交通大学 | High-speed railway mobile network covering method based on distributed antenna and fixed switching channel |
| JP2011188497A (en) * | 2010-03-10 | 2011-09-22 | Fujitsu Ltd | Electric power distribution system and method |
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| CN1322413A (en) * | 1998-12-21 | 2001-11-14 | 诺基亚网络有限公司 | Data transmission method and radio system |
| JP2011188497A (en) * | 2010-03-10 | 2011-09-22 | Fujitsu Ltd | Electric power distribution system and method |
| CN101867945A (en) * | 2010-05-31 | 2010-10-20 | 北京交通大学 | High-speed railway mobile network covering method based on distributed antenna and fixed switching channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105407506A (en) * | 2014-09-16 | 2016-03-16 | 成都鼎桥通信技术有限公司 | RRU uplink data receiving and processing method and apparatus |
| CN105407506B (en) * | 2014-09-16 | 2019-03-01 | 成都鼎桥通信技术有限公司 | A kind of the upstream data receiving handling method and device of RRU |
| WO2018145529A1 (en) * | 2017-02-10 | 2018-08-16 | 京信通信系统（中国）有限公司 | Data transmission method and device |
| WO2021204097A1 (en) * | 2020-04-05 | 2021-10-14 | Transferfi Pte. Ltd. | Channel learning and power transmission in wireless power networks |
| CN115103426A (en) * | 2022-06-10 | 2022-09-23 | 中信科移动通信技术股份有限公司 | Energy-saving control method and device for indoor multi-mode base station |
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| CN103220682B (en) | 2016-05-11 |
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