CN1430429A - Interference reducing method of frequency dirision duplex and time dirision duplex multi carrier adjacent frequency time - Google Patents
Interference reducing method of frequency dirision duplex and time dirision duplex multi carrier adjacent frequency time Download PDFInfo
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- CN1430429A CN1430429A CN 01145111 CN01145111A CN1430429A CN 1430429 A CN1430429 A CN 1430429A CN 01145111 CN01145111 CN 01145111 CN 01145111 A CN01145111 A CN 01145111A CN 1430429 A CN1430429 A CN 1430429A
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Abstract
A method to reduce interference under adjacent frequency of frequency division duplex (FDD) multicarrierwave and time division duplex (TDD) multicarrierwave uses multiple shared public channel of carrierwave in TDD-CDMA system and uses the same pilot frequency channel for away from carrierware frequency of FDD-CDMA system including broadcast channel, paging channel and down pilot frequency channel, as well only utilizes intelligent antenna technique at each special channel to use original set carrierwave so as to make power of signal received by FDD base station from transmission of TDD base station be lowered. The adjacent frequency interference between two systems can be much reduced by the method, and the system capacity can be much increased.
Description
Technical field
The present invention relates to the mobile communication technology field, be under the situation of using smart antenna, during with the adjacent frequency of Frequency Division Duplexing (FDD) code division multiple access (FDD-CDMA) system, the method of falling interference of time-division duplex (TDD-CDMA) multicarrier system, when being time-division duplex multicarrier and two kinds of coexistence of systems of Frequency Division Duplexing (FDD), reduce the method for disturbing between them.
Background technology
Along with developing rapidly of global mobile communication business, the 3G (Third Generation) Moblie technology is just causing the concern that people are increasing.At present, the standard of the 3G (Third Generation) Moblie of being duly admitted by ITU has three: WCDMA, and cdma2000 and TD-SCDMA, wherein WCDMA and cdma2000 adopt Frequency Division Duplexing (FDD) (FDD) mode, and TD-SCDMA adopts time division duplex (TDD) mode.These three kinds of standards respectively have characteristics, can continue to use and be extensive use of in 3-G (Generation Three mobile communication system).
Intelligent antenna technology is a branch of 3G (Third Generation) Moblie technology, this technology is utilized Digital Signal Processing, produce the spatial orientation wave beam, make antenna main beam aim at the subscriber signal arrival direction, can reach the purpose of fully efficiently utilizing mobile subscriber's signal and deletion or suppressing interference signal.Intelligent antenna technology is confirmed as continuing to improve the primary study direction of 3G (Third Generation) Moblie capacity with other interference cancellation techniques.
But, cover simultaneously under the situation of a sub-district in time division duplex CDMA (TDD-CDMA) system and Frequency Division Duplexing (FDD) CDMA (FDD-CDMA) system, when TDD-CDMA is adjacent with FDD-CDMA system carrier frequency, the signal of TDD system base-station emission will produce extremely strong interference to the reception of FDD system base-station, have a strong impact on the service quality of FDD system.
Specifically, the TD-SCDMA Traffic Channel is used intelligent antenna technology, and the conclusion that draws by emulation is: owing to be narrow beam, can stand the adjacent interference volume frequently of FDD, topmost influence is the common signal channel part that can not adopt smart antenna.Therefore common signal channel is a theaomni-directional transmission in a sub-district, and the common signal channel of several TDD carrier frequency carries out theaomni-directional transmission, will produce serious disturbance to the reception of its adjacent FDD system.
Summary of the invention
When the objective of the invention is to design a kind of Frequency Division Duplexing (FDD) and time division duplex multi carrier adjacent frequency interference method falls, to reduce two kinds of interference between system.
Method of the present invention is to use under the smart antenna situation, under the situation of TDD-CDMA and two kinds of systems' while coverage cell of FDD-CDMA, when time division duplex multicarrier system and frequency division duplex system neighbour frequency, solves the adjacent frequency interference problem of FDD and TDD.
The technical scheme that realizes the object of the invention is such: fall interference method when a kind of Frequency Division Duplexing (FDD) and time division duplex multi carrier adjacent frequency, it is characterized in that:
Be to allow the shared common signal channel of a plurality of carrier waves in time-division duplex (TDD-CDMA) system, and allow this shared common signal channel use same carrier frequency away from Frequency Division Duplexing (FDD) code division multiple access (FDD-CDMA) system; With
Allow each dedicated channel of time-division duplex (TDD-CDMA) system, still utilize intelligent antenna technology to use original carrier frequency.
The shared common signal channel of a plurality of carrier waves in described time-division duplex (TDD-CDMA) system, be by time-division duplex (TDD-CDMA) system, carrier frequency according to Frequency Division Duplexing (FDD) code division multiple access (FDD-CDMA) system of while coverage cell, in time-division duplex (TDD-CDMA) system available frequencies scope of resource, choose channel away from Frequency Division Duplexing (FDD) code division multiple access (FDD-VDMA) system carrier frequency as common signal channel, for the dedicated channel of several use different carrier frequencies provides controlled function.
The shared common signal channel of a plurality of carrier waves in described time-division duplex (TDD-CDMA) system further comprises: allow all travelling carriages in the system use same carrier frequency to accept broadcasting and beep-page message earlier; Again by system according to wireless resource management algorithm, when travelling carriage carries out service access, dedicated channel transferred on the less carrier frequency of load in all carrier frequency.
The same channel away from Frequency Division Duplexing (FDD) (FDD) carrier frequency of described use is to use broadcast channel, paging channel and downlink pilot frequency channel.
Method of the present invention, proposed using under the smart antenna situation, with the adjacent TDD multicarrier system frequently of FDD, by allowing a plurality of carrier waves use a shared common signal channel, with only on each dedicated channel, utilize intelligent antenna technology to use original carrier frequency, just can make the FDD base station receive the power reduction of the signal of TDD base station, thereby reduce by two kinds of interference between system greatly, solve the adjacent interference problem frequently between two kinds of systems, be of value to the capacity of increase system.
Description of drawings
Fig. 1 is the shared common signal channel schematic diagram of multicarrier that adopts the inventive method
Embodiment
Referring to Fig. 1, technical scheme of the present invention has been mainly to solve and has used under the smart antenna situation, the interference problem when TDD multicarrier system and the neighbour of FDD system frequency.Its key problem in technology is to make the shared common signal channel of a plurality of carrier waves in the TDD system, and use same channel away from the FDD carrier frequency, as broadcast channel, it is shared that paging channel and downlink pilot frequency channel can be made multicarrier, its specific implementation process is: at first allow all travelling carriages (terminal equipment) in all systems all receive broadcasting and beep-page message on same frequency, and then by the load condition of system according to each carrier frequency, specify the Traffic Channel of the light relatively carrier frequency of another one load to travelling carriage, promptly by system according to wireless resource management algorithm, when travelling carriage carries out service access, dedicated channel transferred on the less carrier frequency of load in all carrier frequency; Only utilize intelligent antenna technology to use original carrier frequency on each dedicated channel, the power that just can make the FDD base station receive the TDD base station transmit signals reduces, thereby reduces by two kinds of interference between system greatly, increases the capacity of system.
The multicarrier system of TDD-CDMA shown in the figure (three), carrier frequency according to the FDD-CDMA system that covers simultaneously, in TDD-CDMA system available frequencies scope of resource, choose channel away from FDD-CDMA system carrier frequency as three common signal channels (to all travelling carriages) that carrier system is shared, for the dedicated channel (to a certain specific travelling carriage) of several use different carrier frequencies provides various controlled function.
In the TDD-CDMA system of this technology of use, each dedicated channel still uses the carrier frequency of former normal allocation to communicate, and utilizes the wave beam forming technology of smart antenna, for the adjacent dedicated channel frequently of use and FDD system provides narrower wave beam targetedly.According to the calculating of probability theory, can think that the wave beam forming that provides with FDD system adjacent dedicated channel frequently be to be provided smart antenna, the probability that covers the FDD system base-station is less, is that system can stand to the interference of its generation, can guarantee power system capacity.
Method of the present invention, be under the situation that time division duplex CDMA (TDD-CDMA) system and Frequency Division Duplexing (FDD) CDMA (FDD-CDMA) system cover simultaneously, TDD-CDMA multicarrier system, use smart antenna, when adjacent with FDD-CDMA system carrier frequency, for the signal of avoiding TDD system base-station emission produces strong jamming to the reception of FDD system base-station, and a solution of design.By in the TDD system, making the shared common signal channel of a plurality of carrier waves, and use same pilot channel away from the FDD carrier frequency, and only on each dedicated channel, utilize intelligent antenna technology to use original carrier frequency, the power that the TDD system base-station that the FDD system base-station is received transmits reduces, thereby reduces by two kinds of interference between system greatly.
Claims (4)
1. fall interference method when Frequency Division Duplexing (FDD) and time division duplex multi carrier adjacent frequency, it is characterized in that:
Be to allow the shared common signal channel of a plurality of carrier waves in time-division duplex (TDD-CDMA) system, and allow this shared common signal channel use same carrier frequency away from Frequency Division Duplexing (FDD) code division multiple access (FDD-CDMA) system; With
Allow each dedicated channel of time-division duplex (TDD-CDMA) system, still utilize intelligent antenna technology to use original carrier frequency.
2. when a kind of Frequency Division Duplexing (FDD) according to claim 1 and time division duplex multi carrier adjacent frequency interference method falls, it is characterized in that: the shared common signal channel of a plurality of carrier waves in described time-division duplex (TDD-CDMA) system, be by time-division duplex (TDD-CDMA) system, carrier frequency according to Frequency Division Duplexing (FDD) code division multiple access (FDD-CDMA) system of while coverage cell, in time-division duplex (TDD-CDMA) system available frequencies scope of resource, choose channel away from Frequency Division Duplexing (FDD) code division multiple access (FDD-CDMA) system carrier frequency as common signal channel, for the dedicated channel of several use different carrier frequencies provides controlled function.
3. when a kind of Frequency Division Duplexing (FDD) according to claim 1 and time division duplex multi carrier adjacent frequency interference method falls, it is characterized in that the shared common signal channel of a plurality of carrier waves in described time-division duplex (TDD-CDMA) system, further comprise: allow all travelling carriages in the system use same carrier frequency to accept broadcasting and beep-page message earlier; Again by system according to wireless resource management algorithm, when travelling carriage carries out service access, dedicated channel transferred on the less carrier frequency of load in all carrier frequency.
4. during according to claim 1 or 2 or 3 described a kind of Frequency Division Duplexing (FDD) and time division duplex multi carrier adjacent frequency interference method falls, it is characterized in that: the same channel away from Frequency Division Duplexing (FDD) (FDD) carrier frequency of described use is to use broadcast channel, paging channel and downlink pilot frequency channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01145111 CN1190089C (en) | 2001-12-30 | 2001-12-30 | Interference reducing method of frequency dirision duplex and time dirision duplex multi carrier adjacent frequency time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01145111 CN1190089C (en) | 2001-12-30 | 2001-12-30 | Interference reducing method of frequency dirision duplex and time dirision duplex multi carrier adjacent frequency time |
Publications (2)
| Publication Number | Publication Date |
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| CN1430429A true CN1430429A (en) | 2003-07-16 |
| CN1190089C CN1190089C (en) | 2005-02-16 |
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| CN 01145111 Expired - Fee Related CN1190089C (en) | 2001-12-30 | 2001-12-30 | Interference reducing method of frequency dirision duplex and time dirision duplex multi carrier adjacent frequency time |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006000135A1 (en) * | 2004-06-29 | 2006-01-05 | Zte Corporation | A method for adjusting dynamically subsidiary carrier frequency in the multiple carrier frequencies cell |
| WO2006029568A1 (en) * | 2004-09-13 | 2006-03-23 | Datang Mobile Communications Equipment Co., Ltd. | A method of multi-carrier time division duplex mobile communication system allocating radio resource |
| WO2007009292A1 (en) * | 2005-07-18 | 2007-01-25 | Zte Corporation | Downlink reception decision method applied to intelligent antenna |
| CN100372434C (en) * | 2004-09-08 | 2008-02-27 | 华为技术有限公司 | Configuration of special channel with multiple carrier frequency |
| CN100382641C (en) * | 2004-08-17 | 2008-04-16 | 中兴通讯股份有限公司 | Channel allocation method for multi-carrier CDMA system |
| CN100388855C (en) * | 2004-08-14 | 2008-05-14 | 中兴通讯股份有限公司 | Method for adjusting assistant carrier frequency dynamically in multi-carrier frequency cell |
| CN100421497C (en) * | 2005-09-29 | 2008-09-24 | 普天信息技术研究院 | Method for allocating multiple carrier-frequency domain |
| CN101888639A (en) * | 2010-06-30 | 2010-11-17 | 华为技术有限公司 | Method and device for controlling user equipment to reside in cell |
| CN101110630B (en) * | 2006-07-19 | 2011-06-29 | 鼎桥通信技术有限公司 | Method and apparatus for eliminating time slot signal disturbance of descending pilot frequency |
| WO2012079349A1 (en) * | 2010-12-16 | 2012-06-21 | 中兴通讯股份有限公司 | Method and system for restraining interference between neighboring frequency coexistent systems |
| CN102577455A (en) * | 2009-10-06 | 2012-07-11 | 株式会社Ntt都科摩 | Base station device and user device |
| CN111865840A (en) * | 2019-04-26 | 2020-10-30 | 中兴通讯股份有限公司 | Channel estimation method and device |
-
2001
- 2001-12-30 CN CN 01145111 patent/CN1190089C/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006000135A1 (en) * | 2004-06-29 | 2006-01-05 | Zte Corporation | A method for adjusting dynamically subsidiary carrier frequency in the multiple carrier frequencies cell |
| CN100388855C (en) * | 2004-08-14 | 2008-05-14 | 中兴通讯股份有限公司 | Method for adjusting assistant carrier frequency dynamically in multi-carrier frequency cell |
| CN100382641C (en) * | 2004-08-17 | 2008-04-16 | 中兴通讯股份有限公司 | Channel allocation method for multi-carrier CDMA system |
| CN100372434C (en) * | 2004-09-08 | 2008-02-27 | 华为技术有限公司 | Configuration of special channel with multiple carrier frequency |
| US8180354B2 (en) | 2004-09-13 | 2012-05-15 | China Academy Of Telecommunications Technology | Method for allocating radio resource in multi-carrier time division duplex mobile communication system |
| WO2006029568A1 (en) * | 2004-09-13 | 2006-03-23 | Datang Mobile Communications Equipment Co., Ltd. | A method of multi-carrier time division duplex mobile communication system allocating radio resource |
| CN101133571B (en) * | 2005-07-18 | 2012-05-30 | 中兴通讯股份有限公司 | Descending acceptance judging method used for intelligent antenna CDMA communication system |
| WO2007009292A1 (en) * | 2005-07-18 | 2007-01-25 | Zte Corporation | Downlink reception decision method applied to intelligent antenna |
| CN100421497C (en) * | 2005-09-29 | 2008-09-24 | 普天信息技术研究院 | Method for allocating multiple carrier-frequency domain |
| CN101110630B (en) * | 2006-07-19 | 2011-06-29 | 鼎桥通信技术有限公司 | Method and apparatus for eliminating time slot signal disturbance of descending pilot frequency |
| CN102577455A (en) * | 2009-10-06 | 2012-07-11 | 株式会社Ntt都科摩 | Base station device and user device |
| CN102577455B (en) * | 2009-10-06 | 2015-08-19 | 株式会社Ntt都科摩 | Base station apparatus and user's set |
| CN101888639A (en) * | 2010-06-30 | 2010-11-17 | 华为技术有限公司 | Method and device for controlling user equipment to reside in cell |
| CN101888639B (en) * | 2010-06-30 | 2013-04-24 | 华为技术有限公司 | Method and device for controlling user equipment to reside in cell |
| US8600389B2 (en) | 2010-06-30 | 2013-12-03 | Huawei Technologies Co., Ltd. | Method and apparatus for controlling user equipment's residing in a cell |
| WO2012079349A1 (en) * | 2010-12-16 | 2012-06-21 | 中兴通讯股份有限公司 | Method and system for restraining interference between neighboring frequency coexistent systems |
| CN102547730A (en) * | 2010-12-16 | 2012-07-04 | 中兴通讯股份有限公司 | Method and system for restraining interference between adjacent-channel coexisting systems |
| CN102547730B (en) * | 2010-12-16 | 2015-05-06 | 中兴通讯股份有限公司 | Method and system for restraining interference between adjacent-channel coexisting systems |
| CN111865840A (en) * | 2019-04-26 | 2020-10-30 | 中兴通讯股份有限公司 | Channel estimation method and device |
| CN111865840B (en) * | 2019-04-26 | 2024-02-23 | 中兴通讯股份有限公司 | Channel estimation method and device |
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|---|---|
| CN1190089C (en) | 2005-02-16 |
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