CN100352174C - Method for controlling RF switch inversion according to SCDMA signal strength - Google Patents
Method for controlling RF switch inversion according to SCDMA signal strength Download PDFInfo
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- CN100352174C CN100352174C CNB2005100184631A CN200510018463A CN100352174C CN 100352174 C CN100352174 C CN 100352174C CN B2005100184631 A CNB2005100184631 A CN B2005100184631A CN 200510018463 A CN200510018463 A CN 200510018463A CN 100352174 C CN100352174 C CN 100352174C
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Abstract
The present invention relates to a method for controlling RF switch inversion according SCDMA signal strength in an SCDMA repeater. The SCDMA repeater mainly comprises an SCDMA signal radio frequency amplification unit, a signal intensity detecting unit and a central processing unit, wherein the SCDMA signal radio frequency amplification unit completes the amplification of uplink and downlink SCDMA signals; the signal strength detecting unit detects the transmitting signal intensity of the SCDMA base station; the central processing unit controls the RF switch according to the test result of signal intensity and corresponding algorithm to realize uplink and downlink channel inversion of the SCDMA repeater. In the SCDMA repeater, with the detection of the SCDMA signal intensity and the intelligent process of the central processing unit, the present invention achieves the goal of controlling the RF switch exactly and avoids the performance deterioration of the SCDMA system.
Description
Technical field
The present invention relates to a kind of method of in big well-informed SCDMA repeater, controlling RF switch inversion according to SCDMA intensity.
Background technology
The overlay area of which kind of radio communication all will produce weak signal area and blind area, and to some remote districts and the few blind area of number of users, it is too high to set up the base station cost, infrastructure is also complicated, provide for this reason a kind of cost low, set up simply, cost-effective equipment one repeater that but has the small base station function is necessary.Therefore, important role is being played the part of in the SCDMA repeater in the SCDMA network.
Because the SCDMA system is the work of TDD mode, so the SCDMA repeater needs a control signal come radio-frequency (RF) switch in the control appliance, finishes the up-downgoing of radio-frequency channel is switched.Existing SCDMA repeater is just simply by detecting the up-downgoing switching that SCDMA base station down signal strength signal intensity realizes the repeater radio-frequency channel, its method is: when base station transmit signals intensity was higher than certain level value, the repeater radiofrequency signal was switched to down channel; Otherwise the repeater radiofrequency signal is switched to up channel.But because the time-delay of signal strength detection, the repeater down channel is opened more late than the moment of actual signal arrival constantly, causes the descending SCDMA signal through the repeater to sustain damage, thereby the SCDMA systematic function is reduced.Adopt the SCDMA repeater that this method switches can not cascade operation in actual engineering, otherwise SCDMA systematic function rapid deterioration, even can not work fully.
Summary of the invention
The objective of the invention is in order to overcome the above-mentioned defective that prior art exists, a kind of method of controlling RF switch inversion in the SCDMA repeater according to the SCDMA signal strength signal intensity is provided, this method can solve in use the SCDMA repeater, problems such as the control of up-downgoing RF switch inversion is accurate inadequately, switch time-delay occur, avoid the mis-behave of SCDMA system.
Technical scheme of the present invention is: a kind of method of controlling RF switch inversion in big well-informed SCDMA repeater according to SCDMA intensity, described SCDMA repeater mainly comprises SCDMA signal RF amplifying unit, signal strength detection unit and central processing unit, the RF switch inversion method is: SCDMA signal RF amplifying unit amplifies the SCDMA signal of uplink and downlink, sends to SCDMA repeater and antenna-feedback system; The signal strength detection unit carries out intensity detection to the SCDMA base station transmit signals, and testing result is sent to central processing unit; Central processing unit is controlled realization SCDMA repeater uplink and downlink channel with corresponding algorithm to radio-frequency (RF) switch according to the signal strength detection result and is switched.Because the SCDMA system is the system of time division duplex work, in the cycle of 10ms, up channel and the down channel 5ms that works respectively, and the switching of up channel and down channel realizes by signal strength detection unit, central processing unit and switching control section; According to the signal strength detection result, central processing unit judges that the SCDMA network is to be in descending time slot, still is in ascending time slot, carries out the uplink and downlink of SCDMA radio frequency amplifying unit simultaneously and switches control, and concrete steps are as follows:
(1) be in state 1 behind the system boot, radio-frequency (RF) switch is closed the uplink and downlink channel;
(2) the signal strength detection unit constantly detects the signal strength signal intensity of SCDMA base station, and judges that whether it is greater than the thresholding of setting;
(3) if the signal strength signal intensity of SCDMA base station greater than setting thresholding, thinks that then the SCDMA network is to be in descending time slot, central processing unit control radio-frequency (RF) switch is opened the downlink radio frequency channel, and the timer zero clearing also picks up counting;
(4) judge that whether the timer time is greater than 5ms-τ
1, τ wherein
1It is the lead sum of signal strength detection time delay and radio-frequency (RF) switch;
(5) if the timer time greater than 5ms-τ
1, then system transfers to state 3, thinks that the SCDMA network is in ascending time slot, and central processing unit control radio-frequency (RF) switch is closed the downlink radio frequency channel, opens up radio-frequency channel, and timer zero clearing simultaneously also picks up counting;
(6) judge that whether the timer time is greater than 5ms;
(7) if the timer time greater than 5ms, then system transfers to state 4, thinks that the SCDMA network is in descending time slot, central processing unit control radio-frequency (RF) switch is closed up radio-frequency channel, opens the downlink radio frequency channel, timer zero clearing simultaneously also picks up counting;
(8) the signal strength detection unit constantly detects the signal strength signal intensity of SCDMA base station, and judges that whether the timer time is greater than τ
2, τ wherein
2Be the system protection time interval, its span is 390.625 μ s～5ms;
(9) when the timer time more than or equal to τ
2The time, and the signal strength signal intensity of SCDMA base station is less than setting thresholding, thinks that then SCDMA base station fault or synchronization slot make mistakes, system transfers to state 1;
(10) if at guard time τ
2In detect the SCDMA base station signal strength signal intensity greater than setting thresholding, then system transfers to state 2.Wherein state 1 is the initial condition after starting shooting, and state 2 is for opening the state of downlink radio frequency channel, and state 3 is that the timer time is greater than 5ms-τ
1State, state 4 are the state of timer time greater than 5ms.
The present invention has avoided the SCDMA system performance degradation for the SCDMA repeater provides certain radio-frequency (RF) switch lead.Simultaneously because the SCDMA repeater can cascade, make that networking is convenient in the actual engineering.
Description of drawings
Fig. 1 uses block diagram for the SCDMA repeater.
Fig. 2 is a SCDMA repeater theory diagram.
Fig. 3 is a SCDMA repeater Based Intelligent Control RF switch inversion flow chart.
Embodiment
In conjunction with Fig. 1, Fig. 2, Fig. 3, the concrete course of work in SCDMA repeater of coming the Based Intelligent Control RF switch inversion according to signal strength signal intensity is described.The SCDMA repeater mainly comprises SCDMA signal RF amplifying unit, signal strength detection unit and central processing unit.The time-delay of supposing signal strength detection is 50 μ s, τ
1Value is 190 μ s, τ
2Value is 1ms, and signal strength threshold is-50dBm that then the course of work of SCDMA repeater is as follows:
(1) be in state 1 behind the system boot, radio-frequency (RF) switch is closed the up-downgoing channel;
(2) the signal strength detection unit constantly detects the signal strength signal intensity of SCDMA base station, and judges that it is whether greater than-50dBm;
(3) if the signal strength signal intensity of SCDMA base station greater than-50dBm, thinks that then the SCDMA network is to be in descending time slot, central processing unit control radio-frequency (RF) switch is opened the downlink radio frequency channel, and the timer zero clearing also picks up counting;
(4) judge that whether the timer time is greater than 4810 μ s;
(5) if the timer time greater than 4810 μ s, then system transfers to state 3, thinks that the SCDMA network is in ascending time slot, closes the downlink radio frequency channel, central processing unit control radio-frequency (RF) switch is opened up radio-frequency channel, timer zero clearing simultaneously also picks up counting;
(6) judge that whether the timer time is greater than 5ms;
(7) if the timer time greater than 5ms, then system transfers to state 4, thinks that the SCDMA network is in descending time slot, closes up radio-frequency channel, central processing unit control radio-frequency (RF) switch is opened the downlink radio frequency channel, timer zero clearing simultaneously also picks up counting;
(8) the signal strength detection unit constantly detects the signal strength signal intensity of SCDMA base station, and judges that whether the timer time is greater than 1ms;
(9) when timer time during more than or equal to 1ms, and the signal strength signal intensity of SCDMA base station is less than-50dBm, thinks that then SCDMA base station fault or synchronization slot make mistakes, and system transfers to state 1;
(10) if the signal strength signal intensity that in 1ms, detects the SCDMA base station greater than-50dBm, then system transfers to state 2.Carry out periodic duty.Wherein state 1 is the initial condition after starting shooting, and state 2 is for opening the state of downlink radio frequency channel, and state 3 is that the timer time is greater than 5ms-τ
1State, state 4 are the state of timer time greater than 5ms.
Claims (1)
1, a kind ofly in big well-informed SCDMA repeater, controls the RF switch inversion method according to SCDMA intensity, described SCDMA repeater, mainly comprise SCDMA signal RF amplifying unit, signal strength detection unit and central processing unit, the RF switch inversion method is: SCDMA signal RF amplifying unit amplifies the SCDMA signal of uplink and downlink, sends to SCDMA repeater and antenna-feedback system; The signal strength detection unit carries out intensity detection to the SCDMA base station transmit signals, and testing result is sent to central processing unit; Central processing unit is controlled realization SCDMA repeater uplink and downlink channel with corresponding algorithm to radio-frequency (RF) switch according to the signal strength detection result and is switched, and the concrete steps of described RF switch inversion method are as follows:
(1) be in state 1 behind the system boot, radio-frequency (RF) switch is closed the uplink and downlink channel;
(2) the signal strength detection unit constantly detects the signal strength signal intensity of SCDMA base station, and judges that whether it is greater than the thresholding of setting;
(3) if the signal strength signal intensity of SCDMA base station greater than setting thresholding, thinks that then the SCDMA network is to be in descending time slot, central processing unit control radio-frequency (RF) switch is opened the downlink radio frequency channel, and the timer zero clearing also picks up counting;
(4) judge that whether the timer time is greater than 5ms-τ
1, τ wherein
1It is the lead sum of signal strength detection time delay and radio-frequency (RF) switch;
(5) if the timer time greater than 5ms-τ
1, then system transfers to state 3, thinks that the SCDMA network is in ascending time slot, and central processing unit control radio-frequency (RF) switch is closed the downlink radio frequency channel, opens up radio-frequency channel, and timer zero clearing simultaneously also picks up counting;
(6) judge that whether the timer time is greater than 5ms;
(7) if the timer time greater than 5ms, then system transfers to state 4, thinks that the SCDMA network is in descending time slot, central processing unit control radio-frequency (RF) switch is closed up radio-frequency channel, opens the downlink radio frequency channel, timer zero clearing simultaneously also picks up counting;
(8) the signal strength detection unit constantly detects the signal strength signal intensity of SCDMA base station, and judges that whether the timer time is greater than τ
2, τ wherein
2Be the system protection time interval, its span is 390.625 μ s～5ms;
(9) when the timer time more than or equal to τ
2The time, and the signal strength signal intensity of SCDMA base station is less than setting thresholding, thinks that then SCDMA base station fault or synchronization slot make mistakes, system transfers to state 1;
(10) if at guard time τ
2In detect the SCDMA base station signal strength signal intensity greater than setting thresholding, then system transfers to state 2, the initial condition of state 1 after wherein for start, state 2 is for opening the state of downlink radio frequency channel, state 3 is that the timer time is greater than 5ms-τ
1State, state 4 are the state of timer time greater than 5ms.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100184631A CN100352174C (en) | 2005-03-28 | 2005-03-28 | Method for controlling RF switch inversion according to SCDMA signal strength |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100184631A CN100352174C (en) | 2005-03-28 | 2005-03-28 | Method for controlling RF switch inversion according to SCDMA signal strength |
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| CN1665151A CN1665151A (en) | 2005-09-07 |
| CN100352174C true CN100352174C (en) | 2007-11-28 |
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| US8554136B2 (en) | 2008-12-23 | 2013-10-08 | Waveconnex, Inc. | Tightly-coupled near-field communication-link connector-replacement chips |
| KR20150041653A (en) | 2012-08-10 | 2015-04-16 | 키사, 아이엔씨. | Dielectric coupling systems for ehf communications |
| US9374154B2 (en) | 2012-09-14 | 2016-06-21 | Keyssa, Inc. | Wireless connections with virtual hysteresis |
| CN104937769B (en) | 2012-12-17 | 2018-11-16 | 凯萨股份有限公司 | Modular electronic equipment |
| WO2014149107A1 (en) | 2013-03-15 | 2014-09-25 | Waveconnex, Inc. | Ehf secure communication device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1266559A (en) * | 1998-03-20 | 2000-09-13 | 株式会社东芝 | Radio transmitter/receiver, high-frequency radio receiver, and control unit |
| EP1361666A1 (en) * | 2001-01-29 | 2003-11-12 | NEC Corporation | Time division multiplexing connection transceiver and its receiving automatic gain control method |
| CN1514554A (en) * | 2002-12-31 | 2004-07-21 | 深圳市中兴通讯股份有限公司 | Diversity device used on TDD mobile communication system |
| CN1588812A (en) * | 2004-07-22 | 2005-03-02 | 武汉虹信通信技术有限责任公司 | Method for controlling radio frequency switch changeover according to PHS signal |
-
2005
- 2005-03-28 CN CNB2005100184631A patent/CN100352174C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1266559A (en) * | 1998-03-20 | 2000-09-13 | 株式会社东芝 | Radio transmitter/receiver, high-frequency radio receiver, and control unit |
| EP1361666A1 (en) * | 2001-01-29 | 2003-11-12 | NEC Corporation | Time division multiplexing connection transceiver and its receiving automatic gain control method |
| CN1514554A (en) * | 2002-12-31 | 2004-07-21 | 深圳市中兴通讯股份有限公司 | Diversity device used on TDD mobile communication system |
| CN1588812A (en) * | 2004-07-22 | 2005-03-02 | 武汉虹信通信技术有限责任公司 | Method for controlling radio frequency switch changeover according to PHS signal |
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| CN1665151A (en) | 2005-09-07 |
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Assignee: Shenzhen Hongyuan Communication Limited Liability Company Assignor: Wuhan Hongxin Communication Technology Co., ltd. Contract fulfillment period: 2009.3.16 to 2019.3.16 contract change Contract record no.: 2009440000231 Denomination of invention: Method for controlling RF switch inversion according to SCDMA signal strength Granted publication date: 20071128 License type: Exclusive license Record date: 2009.4.7 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.3.16 TO 2019.3.16; CHANGE OF CONTRACT Name of requester: SHENZHEN CITY HONGYUAN COMMUNICATION CO.,LTD. Effective date: 20090407 |
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Granted publication date: 20071128 |