CN101516139B - Method for concentrated distribution of a plurality of base station precoders - Google Patents
Method for concentrated distribution of a plurality of base station precoders Download PDFInfo
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- CN101516139B CN101516139B CN2008100083155A CN200810008315A CN101516139B CN 101516139 B CN101516139 B CN 101516139B CN 2008100083155 A CN2008100083155 A CN 2008100083155A CN 200810008315 A CN200810008315 A CN 200810008315A CN 101516139 B CN101516139 B CN 101516139B
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Abstract
The invention discloses a method for the concentrated distribution of a plurality of base station precoders. The method comprises the following steps that: when a terminal has an access to a base station, the base station reports the position information and the service priority information of the terminal to a multi-base-station dispatcher; the base station reports the feedback information of the terminal to the multi-base-station dispatcher at regular time, and the feedback information of the terminal comprises the interfered condition of the terminal; the multi-base-station dispatcher analyzes and determines the interfered condition of the terminal according to the feedback information of the terminal, and sets out and transmits dispatching information according to the interfered condition of the terminal, the position information and the service priority information; and the base station adjusts the antenna transmitting direction or transmitting strength in time according to the dispatching information. The technical proposal of the invention improves the transmission rate of the terminal in an overlapped area covered by two or more base stations.
Description
Technical field
The present invention relates to a kind of mobile communication technology, specifically, relate to the method for the precoder of a plurality of base stations of a kind of concentrated distribution.
Background technology
Precoding (precoder) technology is the technology of the present software control antenna transmit direction that adopts; Through with multiple-input and multiple-output (MIMO; Multiple-Input Multiple-Out-put) a plurality of antennas in the system transmit and pre-coding matrix multiplies each other; Can change the aerial radiation direction, make the terminal on certain specific direction obtain bigger received power.
Under multi-input multi-output system, in the adaptive pre-encoding of low complex degree (precoding) method,, a kind of adaptive pre-encoding scheme with low complex degree has been proposed to intersymbol interference that exists in the multiple-input and multiple-output fading channel and multipath interference problem.This scheme has been placed precoder respectively and based on the receiver of zero forcing algorithm at transmitting terminal and receiving terminal.Like this, receiver is given transmitting terminal with feedback of channel information when carrying out equilibrium decoding, and transmitting terminal just can select to send the number and the pre-coding matrix of subcarrier thereupon, accomplishes adaptive pre-encoding.This scheme can effectively reduce the error rate of system; Simulation result shows, when the error rate is 10～3, under the transmitting channel information condition of unknown; The signal to noise ratio of this scheme than channel information known based on the high 1.3dB of least mean-square error pre-coding scheme, and complexity reduces greatly.
But the decreased performance of cell edge is still a great difficult problem.The use of MIMO technology can improve the data transfer rate of center of housing estate, but is difficult to improve the performance of cell edge.Cell edge is because signal interference ratio is lower; Be difficult to support the multithread transmission; Therefore the antenna amount that adopts along with system increases, and the performance of center of housing estate possibly improve constantly, but the performance of cell edge is difficult to improve; Also be difficult in cell edge in the operable high-order modulating of center of housing estate and use, cause the performance difference of center of housing estate and cell edge increasing.
Precoding technique can not solve the decreased performance problem of cell edge fully; At cell edge; The overlapping region covered in a plurality of base stations, if close on the space, a plurality of terminal, transmit direction is adjusted to the direction at these terminals respectively in the base station of communication with it; At this point the mobile phone under other base stations of giving in district causes serious interference on the contrary, reduces the speed at terminal, edge zone greatly.
Summary of the invention
The technical problem that the present invention solved provides the method for the precoder of a plurality of base stations of a kind of concentrated distribution, has increased to be in the transmission rate that two or more base stations cover the terminal in overlapping area.
Technical scheme is following:
The method of the precoder of a plurality of base stations of a kind of concentrated distribution, step comprises:
(1) when base station access by terminal, the base station is to the positional information and the service priority information of many base station dispatchers reporting terminal;
(2) base station is regularly to many base station dispatchers reporting terminal feedback information, and this terminal feedback information comprises the disturbed condition that said terminal receives; Said many base station dispatchers are according to the suffered disturbed condition in said terminal, and positional information and service priority information are formulated and sent schedule information to the base station;
(3) scheduling strategy or antenna for base station transmit direction to the terminal are in time adjusted according to schedule information in the base station.
Further, in the step (1), said terminal feedback information comprises pilot strength information, channel quality indication, the sequence number of preferable cell and the sequence number of candidate cell.
Further, in the step (2), cover overlapping areas if two terminals that communicate with two base stations respectively all are in two base stations, said many base station dispatchers are judged the priority at terminal, increase the dispatcher meeting at the high terminal of priority.
Further, in the step (2), if the priority at the said terminal that is interfered is identical, said many base station dispatchers are judged the handling capacity at the terminal that is interfered, increase the dispatcher meeting at the high terminal of handling capacity.
Further, in the step (2), if the handling capacity at the terminal that is interfered is identical, said many base station dispatchers are adjusted the precoder of base station, make the antenna transmit direction of said base station stagger each other.
The present invention distributes through the precoder of many base station dispatchers to a plurality of base stations; Make to be in a plurality of terminals that two or more base stations cover overlapping area, and then reduce and be in the interference that two or more base stations cover the suffered adjacent base station in the terminal in overlapping area by the different precoder of base station assigns.
Description of drawings
Fig. 1 is an application scenarios sketch map of the present invention.
Embodiment
With reference to the accompanying drawings, the preferred embodiments of the present invention are done detailed description.
As shown in Figure 1, four base stations are assigned precoder respectively, and each precoder receives the control of many base station dispatchers, and these many base station dispatchers are responsible for carrying out centralized dispatching with its precoder that is connected, thus the transmit direction of each antenna for base station of centralized control.
After the terminal receives the interference of adjacent base station among the figure, to the terminal feedback information of many base station dispatcher feedbacks; The schedule information that many base station dispatchers issue to the target precoder.Many base station dispatchers not only can the centralized dispatching precoder, and other base station resource also can centralized dispatching.
With reference to the accompanying drawings, the process to many base station dispatchers centralized dispatching precoder elaborates.
Step 1: when base station access by terminal, the base station is to the positional information and the service priority information of many base station dispatchers reporting terminal.
Step 2: the base station is regularly to many base station dispatchers reporting terminal feedback information, and this terminal feedback information comprises pilot strength information and CQI (channel quality indication Channel Quality Indicator).Many base station dispatchers are according to the terminal feedback information analysis and confirm the suffered interference in terminal, formulate and issue schedule information according to positional information and service priority information.
Step 3: the schedule information that send according to many base station dispatchers the base station is in time adjusted the scheduling strategy at terminal or the transmit direction of antenna for base station.
If two terminal UE 1 and UE2 are in the overlapping region of base station BS 1 and base station BS 2 at this moment, UE1 has set up with BS1 and has been connected, and UE2 has set up with BS2 and has been connected; BS1 is through precoding, and the antenna transmit direction changes, and makes the power of the BS1 that UE1 receives increase, and UE2 has been caused interference, and same, UE1 has also received the interference of BS2.
UE1 that many base station dispatchers report according to BS1 and BS2 and positional information and the disturbed condition of UE2 are judged UE1 and UE2 and are received the interference from BS2 and BS 1 just respectively; Many base station dispatchers are judged the priority of UE1 and UE2, increase the dispatcher meeting at the high terminal of priority.If the priority of UE1 and UE2 is identical, many base station dispatchers are judged the handling capacity of UE1 and UE2, increase the dispatcher meeting at the high terminal of handling capacity.
If the handling capacity of UE1 and UE2 is also identical, many base station dispatchers adjust to the precoder that BS1 and BS2 point to UE1 and UE2 respectively, make the antenna transmit direction stagger each other, disturb and reduce.
Claims (5)
1. method of concentrate distributing the precoder of a plurality of base stations, step comprises:
(1) when base station access by terminal, the base station is to the positional information and the service priority information of many base station dispatchers reporting terminal; Each base station assigns has precoder, and each precoder is controlled by many base station dispatchers;
(2) base station is regularly to many base station dispatchers reporting terminal feedback information, and this terminal feedback information comprises the disturbed condition that said terminal receives; Said many base station dispatchers are according to the suffered disturbed condition in said terminal, and positional information and service priority information are formulated and sent schedule information to the base station;
(3) scheduling strategy or antenna for base station transmit direction to the terminal are in time adjusted according to schedule information in the base station.
2. the method for the precoder of a plurality of base stations of concentrated distribution as claimed in claim 1 is characterized in that, in the step (2), said terminal feedback information comprises pilot strength information, channel quality indication, the sequence number of preferable cell and the sequence number of candidate cell.
3. the method for the precoder of a plurality of base stations of concentrated distribution as claimed in claim 1; It is characterized in that; In the step (2); If two terminals that communicate with two base stations respectively all are in two base stations and cover overlapping areas, said many base station dispatchers are judged the priority at terminal, increase the dispatcher meeting at the high terminal of priority.
4. the method for the precoder of a plurality of base stations of concentrated distribution as claimed in claim 3; It is characterized in that; In the step (2); If the priority at the said terminal that is interfered is identical, said many base station dispatchers are judged the handling capacity at the terminal that is interfered, increase the dispatcher meeting at the high terminal of handling capacity.
5. the method for the precoder of a plurality of base stations of concentrated distribution as claimed in claim 4; It is characterized in that; In the step (2); If the handling capacity at the terminal that is interfered is identical, said many base station dispatchers are adjusted the precoder of base station, make the antenna transmit direction of said base station stagger each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100083155A CN101516139B (en) | 2008-02-22 | 2008-02-22 | Method for concentrated distribution of a plurality of base station precoders |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100083155A CN101516139B (en) | 2008-02-22 | 2008-02-22 | Method for concentrated distribution of a plurality of base station precoders |
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| Publication Number | Publication Date |
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| CN101516139A CN101516139A (en) | 2009-08-26 |
| CN101516139B true CN101516139B (en) | 2012-04-18 |
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| CN2008100083155A Expired - Fee Related CN101516139B (en) | 2008-02-22 | 2008-02-22 | Method for concentrated distribution of a plurality of base station precoders |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998415B (en) * | 2010-10-29 | 2014-01-29 | 北京邮电大学 | Interference self-avoidance substation site selection method of TD-LTE (TD-SCDMA Long Term Evolution) system |
| CN103580782B (en) | 2012-07-24 | 2017-10-17 | 华为技术有限公司 | The base band processing device and wireless communication system of wireless communication system |
| JP6369317B2 (en) * | 2014-12-15 | 2018-08-08 | ソニー株式会社 | Information processing apparatus, communication system, information processing method, and program |
| EP3852453B1 (en) * | 2018-12-20 | 2023-09-27 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Resource scheduling |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470145A (en) * | 2000-10-10 | 2004-01-21 | ˹���ķ��Ź�˾ | Medium access control for orthogonal frequency-division multiple-access (OFDMA) cellular networks |
| CN1756409A (en) * | 2004-09-28 | 2006-04-05 | 大唐移动通信设备有限公司 | Dynamic channel distributing method for realizing cross time slot based on intelligent antenna |
| CN1777062A (en) * | 2004-11-16 | 2006-05-24 | 戴闽鲁 | Inter-base-station time synchronizing relation and TDD cochannel inter ference base station determining method |
| CN1881867A (en) * | 2005-06-17 | 2006-12-20 | 华为技术有限公司 | Method for eliminating interference between cells |
| CN101030802A (en) * | 2007-02-05 | 2007-09-05 | 北京邮电大学 | Wireless multi-skip trunk network combining method for supporting multimedium broadcasting service |
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- 2008-02-22 CN CN2008100083155A patent/CN101516139B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470145A (en) * | 2000-10-10 | 2004-01-21 | ˹���ķ��Ź�˾ | Medium access control for orthogonal frequency-division multiple-access (OFDMA) cellular networks |
| CN1756409A (en) * | 2004-09-28 | 2006-04-05 | 大唐移动通信设备有限公司 | Dynamic channel distributing method for realizing cross time slot based on intelligent antenna |
| CN1777062A (en) * | 2004-11-16 | 2006-05-24 | 戴闽鲁 | Inter-base-station time synchronizing relation and TDD cochannel inter ference base station determining method |
| CN1881867A (en) * | 2005-06-17 | 2006-12-20 | 华为技术有限公司 | Method for eliminating interference between cells |
| CN101030802A (en) * | 2007-02-05 | 2007-09-05 | 北京邮电大学 | Wireless multi-skip trunk network combining method for supporting multimedium broadcasting service |
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| CN101516139A (en) | 2009-08-26 |
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