CN102761876B - Two net common mode method and system - Google Patents
Two net common mode method and system Download PDFInfo
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- CN102761876B CN102761876B CN201110103980.4A CN201110103980A CN102761876B CN 102761876 B CN102761876 B CN 102761876B CN 201110103980 A CN201110103980 A CN 201110103980A CN 102761876 B CN102761876 B CN 102761876B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
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Abstract
The invention discloses a kind of two net common mode method and system, by CDMA Signal averaging on LTE/LTE-A signal; And on the frequency spectrum of CDMA and LTE/LTE-A Signal averaging, the LTE/LTE-A signal maximum reception PSD on restriction overlapped resource.Of the present invention pair of net common mode technology can realize LTE/LTE-A and CDMA common carrier frequency, effectively improve wireless frequency spectrum efficiency and the availability of frequency spectrum that cdma network takies, efficiently solve the frequency spectrum resource waste problem brought at the protection interval between the low and different system of the 3G availability of frequency spectrum, decrease the transmission channel number of RRU simultaneously, make to support that multiple network becomes possibility with single channel RRU, also there is the effect reducing construction cost and hardware manufacturing cost in other conventional common mode schemes simultaneously, and make 3G smooth evolution drop to minimum to the work risk of LTE/LTE-A and enforcement difficulty.
Description
Technical field
The present invention relates to the communications field, be specifically related to two net common mode method and system.
Background technology
Along with the development of wireless broadband communication technology and improving constantly of user's request, radio spectrum resources is as a kind of non-renewable resources, precious all the more.OFDM (OFDM, OrthogonalFrequencyDivisionMultiplexing) technology is with its spectrum efficiency height and realize simple feature, drastically increases spectrum efficiency.At present, Long Term Evolution (LTE, LongTermEvolution) system and senior LTE (LTE-A, LTEAdvanced) system all have employed OFDM technology.
But, code division multiple access (CDMA) technology as 3G system basis and be widely adopted, also by long-time running.And the spectrum efficiency of the code division multiplexing that 3G system adopts (CDM) technology is lower than OFDM, thus the excellent low-frequency band of a large amount of wireless performances shared by 3G system cannot be used effectively.
Common common mode scheme is all absorbed in reduction construction cost and hardware manufacturing cost, as: colocation site, altogether antenna feeder, cascode (RRU frequently, RadioRemoteUnite) and base band (BBU, BaseBandUnite) etc., but for spectrum efficiency then without any contribution.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of two net common mode method and system, to improve the wireless frequency spectrum efficiency and the availability of frequency spectrum that cdma network takies.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of two net common mode method, comprising: by code division multiple access CDMA Signal averaging on Long Term Evolution LTE/ senior Long Term Evolution LTE-A signal; On the frequency spectrum of CDMA and LTE/LTE-A Signal averaging, the LTE/LTE-A signal maximal received power spectrum density PSD on restriction overlapped resource.
Described by the process of CDMA Signal averaging on LTE/LTE-A signal, comprising: determine CDMA and LTE/LTE-A band system band stacked system.
The method of described CDMA and the LTE/LTE-A of determination band system band stacked system is: establish LTE/LTE-A upstream band ULBW, downstream bands DLBW, and CDMA forward link frequency band FLBW, reverse link frequency band RLBW; Described FLBW and RLBW is superimposed upon on one of LTE/LTE-A or two frequency bands, guarantees that FLBW and RLBW is not overlapping.
The method be superimposed upon by described FLBW and RLBW on one of LTE/LTE-A or two frequency bands is: be superimposed upon on the DLBW of LTE/LTE-A by the FLBW of CDMA, the RLBW of CDMA is superimposed upon on the ULBW of LTE/LTE-A, or the RLBW of CDMA is superimposed upon on the DLBW of LTE/LTE-A, the FLBW of CDMA is superimposed upon on the ULBW of LTE/LTE-A, or the frequency band of CDMA is all superimposed upon on the ULBW of LTE/LTE-A, or the frequency band of CDMA is all superimposed upon on the DLBW of LTE/LTE-A.
The method of the maximum reception of the LTE/LTE-A signal on described restriction overlapped resource PSD is: set LTE/LTE to receive PSD as PSDRxL, the PSD of cdma system is PSDRxC, and the signal detecting threshold of cdma system is SINRC, then:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein InterferenceMargin is Cell Interference Margin;
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin.
A kind of two net common mode system, comprises CDMA and LTE/LTE-A frequency band stacked system determining unit, LTE/LTE-A power control unit; Wherein,
Described CDMA and LTE/LTE-A frequency band stacked system determining unit, for by CDMA Signal averaging at LTE/LTE-A signal;
Described LTE/LTE-A power control unit, for the frequency spectrum at CDMA and LTE/LTE-A Signal averaging, the LTE/LTE-A signal maximum reception PSD on restriction overlapped resource.
Described CDMA and LTE/LTE-A frequency band stacked system determining unit, during by CDMA Signal averaging on LTE/LTE-A signal, specifically for determining CDMA and LTE/LTE-A band system band stacked system.
Described CDMA and LTE/LTE-A frequency band stacked system determining unit, when determining CDMA and LTE/LTE-A band system band stacked system, specifically for: ULBW, DLBW of establishing LTE/LTE-A, and FLBW, RLBW of CDMA; Described FLBW and RLBW is superimposed upon on one of LTE/LTE-A or two frequency bands, guarantees that FLBW and RLBW is not overlapping.
Described CDMA and LTE/LTE-A frequency band stacked system determining unit, when described FLBW and RLBW being superimposed upon on one of LTE/LTE-A or two frequency bands, specifically for: the FLBW of CDMA is superimposed upon on the DLBW of LTE/LTE-A, the RLBW of CDMA is superimposed upon on the ULBW of LTE/LTE-A, or the RLBW of CDMA is superimposed upon on the DLBW of LTE/LTE-A, the FLBW of CDMA is superimposed upon on the ULBW of LTE/LTE-A, or the frequency band of CDMA is all superimposed upon on the ULBW of LTE/LTE-A, or the frequency band of CDMA is all superimposed upon on the DLBW of LTE/LTE-A.
Described LTE/LTE-A power control unit, when limiting the LTE/LTE-A signal maximum reception PSD on overlapped resource, specifically for: set LTE/LTE to receive PSD as PSDRxL, the PSD of cdma system is PSDRxC, the signal detecting threshold of cdma system is SINRC, then:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein InterferenceMargin is Cell Interference Margin;
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin.
Visible in sum, no matter be method or system, of the present invention pair of net common mode technology can realize LTE/LTE-A and CDMA common carrier frequency, effectively improve wireless frequency spectrum efficiency and the availability of frequency spectrum that cdma network takies, efficiently solve the frequency spectrum resource waste problem brought at the protection interval between the low and different system of the 3G availability of frequency spectrum, decrease the transmission channel number of RRU simultaneously, make to support that multiple network becomes possibility with single channel RRU, also there is the effect reducing construction cost and hardware manufacturing cost in other conventional common mode schemes simultaneously, and make 3G smooth evolution drop to minimum to the work risk of LTE/LTE-A and enforcement difficulty.
Accompanying drawing explanation
Fig. 1 is the TD SDMA (TD-SCDMA) of the embodiment of the present invention and the common carrier frequency schematic diagram of LTE common mode;
Fig. 2 is the WCDMA of the embodiment of the present invention or the common carrier frequency schematic diagram of CDMA1x and LTE-A common mode;
Fig. 3 is the common carrier frequency schematic diagram of CDMA and the LTE-A common mode of the embodiment of the present invention;
Fig. 4 is CDMA and the LTE-A common mode system schematic of the embodiment of the present invention;
Fig. 5 is two net common mode general flow charts of the embodiment of the present invention.
Embodiment
In order to improve the service efficiency of the wireless frequency spectrum that cdma network takies, reduce Multi net voting with the hardware spending under coverage condition and construction cost, can by CDMA Signal averaging on LTE/LTE-A signal, realize the common carrier frequency design of CDMA and LTE/LTE-A, make cdma system and LTE/LTE-A system can share identical frequency spectrum, improve spectrum efficiency and the availability of frequency spectrum, take into account the advantage of conventional common mode method simultaneously.And, utilize that cdma system spreading gain is high, input Signal to Interference plus Noise Ratio (SINR, SignalInterferenceandNoiseratio) feature that thresholding is low, on the frequency spectrum of CDMA and LTE/LTE-A Signal averaging, LTE/LTE-A signal maximal received power spectrum density (PSD on restriction overlapped resource, PowerSpectrumDensity), to ensure that cdma system can proper communication.
Specifically, following steps can be performed:
Step one, determines CDMA and LTE/LTE-A band system band stacked system;
If LTE/LTE-A upstream band (ULBW) ULBW1, ULBW2 ..., ULBWm; Downstream bands (DLBW) DLBW1, DLBW2 ..., DLBWn; And CDMA forward link frequency band (FLBW), reverse link frequency band (RLBW) is same frequency band for TD-SCDMA, FLBW and RLBW;
Be superimposed upon by FLBW and RLBW on one of LTE/LTE-A or two frequency bands, guarantee that FLBW and RLBW is not overlapping, accompanying drawing 1 to 3 gives 3 kinds of stacked systems;
Step 2, the signal maximum reception PSD on restriction LTE/LTE-A and CDMA Signal averaging place frequency band;
If it is PSDRxL (unit is dBm) that LTE/LTE receives PSD, the PSD of cdma system is PSDRxC (unit is dBm), and the signal detecting threshold of cdma system is SINRC (unit is dB), then:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein InterferenceMargin is Cell Interference Margin, belongs to existing parameter in existing wireless system.
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin.
Below in conjunction with drawings and Examples, present invention is described.
Embodiment one,
The present embodiment is for CDMA and LTE common mode, and cdma system can be WCDMA, CDMA1x, TD-SCDMA etc. herein, and concrete steps are described below:
Step one, determines CDMA and LTE system frequency band stacked system;
If LTE is upstream band ULBW, downstream bands DLBW; And CDMA forward link frequency band FLBW, reverse link frequency band RLBW, be same frequency band for TD-SCDMA, FLBW and RLBW;
Be superimposed upon by FLBW and RLBW on one of LTE or two frequency bands, guarantee that FLBW and RLBW is not overlapping, accompanying drawing 1,2 gives 2 kinds of stacked systems;
Step 2, the signal maximum reception PSD on restriction LTE and CDMA Signal averaging place frequency band;
If it is PSDRxL (unit is dBm) that LTE receives PSD, the PSD of cdma system is PSDRxC (unit is dBm), and the signal detecting threshold of cdma system is SINRC (unit is dB), then:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein InterferenceMargin is Cell Interference Margin, belongs to existing parameter in existing wireless system.
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin.
It should be noted that, the FLBW of CDMA is still superimposed upon on the DLBW of LTE/LTE-A by preferred stacked system, the RLBW of CDMA is superimposed upon on the ULBW of LTE/LTE-A, or the frequency band of CDMA is all superimposed upon (because the load of LTEUL is generally lower than DL, its UL has power control mechanism) on the ULBW of LTE/LTE-A.
Embodiment two,
The present embodiment is for CDMA and LTE-A common mode, and cdma system can be WCDMA, CDMA1x, TD-SCDMA etc. herein, and concrete steps are described below:
Step one, determines CDMA and lte-a system frequency band stacked system;
If LTE-A is upstream band ULBW1, ULBW2 ..., ULBWm; Downstream bands DLBW1, DLBW2 ..., DLBWn; And CDMA forward link frequency band FLBW, reverse link frequency band RLBW, be same frequency band for TD-SCDMA, FLBW and RLBW;
Be superimposed upon by FLBW and RLBW on one of LTE-A or two frequency bands, guarantee that FLBW and RLBW is not overlapping, Fig. 3 gives a kind of stacked system;
Step 2, the signal maximum reception PSD on restriction LTE-A and CDMA Signal averaging place frequency band;
If it is PSDRxL (unit is dBm) that LTE-A receives PSD, the PSD of cdma system is PSDRxC (unit is dBm), and the signal detecting threshold of cdma system is SINRC (unit is dB), then:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein InterferenceMargin is Cell Interference Margin, belongs to existing parameter in existing wireless system.
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin.
Embodiment three
The present embodiment, for CDMA and LTE/LTE-A common mode, describes a kind of CDMA and LTE/LTE-A common mode system, and as shown in Figure 4, its composition is described below:
CDMA and LTE/LTE-A frequency band stacked system determining unit 401, for determining CDMA and LTE/LTE-A frequency band stacked system, is described as follows with CDMA Signal averaging the most at last on LTE/LTE-A signal:
If LTE/LTE-A is upstream band ULBW1, ULBW2 ..., ULBWm; Downstream bands DLBW1, DLBW2 ..., DLBWn; And CDMA forward link frequency band FLBW, reverse link frequency band RLBW, be same frequency band for TD-SCDMA, FLBW and RLBW;
FLBW and RLBW is superimposed upon one or two frequency bands of LTE/LTE-A, guarantee that FLBW and RLBW is not overlapping, accompanying drawing 1 to 3 gives 3 kinds of stacked systems;
LTE/LTE-A power control unit 402, for the frequency spectrum at CDMA and LTE/LTE-A Signal averaging, the LTE/LTE-A signal maximum reception PSD on restriction overlapped resource.Specifically:
If it is PSDRxL (unit is dBm) that LTE/LTE receives PSD, the PSD of cdma system is PSDRxC (unit is dBm), and the signal detecting threshold of cdma system is SINRC (unit is dB), then:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein InterferenceMargin is Cell Interference Margin, belongs to existing parameter in existing wireless system.
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin.
When practical application, wireless heterogeneous networks (RRC) functional entity of LTE/LTE-A is according to the determined GSM frequency band embedded location of CDMA and LTE/LTE-A frequency band stacked system determining unit 401, the frequency domain position of configuration associated wireless channel, avoids LTE/LTE-A and GSM band overlapping and causes inter-system interference.
Visible in conjunction with above each embodiment, the of the present invention pair of net common mode operation thinking can represent flow process as shown in Figure 5, and this flow process comprises the following steps:
Step 510: by CDMA Signal averaging on LTE/LTE-A signal.
Step 520: on the frequency spectrum of CDMA and LTE/LTE-A Signal averaging, the LTE/LTE-A signal maximum reception PSD on restriction overlapped resource.
It should be noted that, not life period sequencing between step 510 and step 520, wherein first arbitrary step can carry out, or two steps are carried out simultaneously.
Visible in sum, no matter be method or system, of the present invention pair of net common mode technology can realize LTE/LTE-A and CDMA common carrier frequency, effectively improve wireless frequency spectrum efficiency and the availability of frequency spectrum that cdma network takies, efficiently solve the frequency spectrum resource waste problem brought at the protection interval between the low and different system of the 3G availability of frequency spectrum, decrease the transmission channel number of RRU simultaneously, make to support that multiple network becomes possibility with single channel RRU, also there is the effect reducing construction cost and hardware manufacturing cost in other conventional common mode schemes simultaneously, and make 3G smooth evolution drop to minimum to the work risk of LTE/LTE-A and enforcement difficulty.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (8)
1. a two net common mode method, it is characterized in that, the method comprises:
By code division multiple access CDMA Signal averaging on Long Term Evolution LTE/ senior Long Term Evolution LTE-A signal; Have on the frequency spectrum of overlapped resource at CDMA and LTE/LTE-A Signal averaging, limit the LTE/LTE-A signal maximal received power spectrum density PSD on described overlapped resource; Wherein,
The method of the maximum reception of the LTE/LTE-A signal on described restriction overlapped resource PSD is:
If it is PSDRxL that LTE/LTE-A receives PSD, the PSD of cdma system is PSDRxC, and the signal detecting threshold of cdma system is SINRC, then:
PSDRxC-PSDRxL–Noise>＝SINRC+InterferenceMargin；
Wherein InterferenceMargin is Cell Interference Margin;
That is: PSDRxL<=PSDRxC – Noise – SINRC-InterferenceMargin.
2. method according to claim 1, is characterized in that, described by the process of CDMA Signal averaging on LTE/LTE-A signal, comprising: determine CDMA and LTE/LTE-A band system band stacked system.
3. method according to claim 2, is characterized in that, the method for described CDMA and the LTE/LTE-A of determination band system band stacked system is:
If LTE/LTE-A is upstream band ULBW, downstream bands DLBW, and CDMA forward link frequency band FLBW, reverse link frequency band RLBW;
Described FLBW and RLBW is superimposed upon on one of LTE/LTE-A or two frequency bands, guarantees that FLBW and RLBW is not overlapping.
4. method according to claim 3, is characterized in that, the method be superimposed upon by described FLBW and RLBW on of LTE/LTE-A or two frequency bands is:
The FLBW of CDMA is superimposed upon on the DLBW of LTE/LTE-A, the RLBW of CDMA is superimposed upon on the ULBW of LTE/LTE-A, or the RLBW of CDMA is superimposed upon on the DLBW of LTE/LTE-A, the FLBW of CDMA is superimposed upon on the ULBW of LTE/LTE-A, or the frequency band of CDMA is all superimposed upon on the ULBW of LTE/LTE-A, or the frequency band of CDMA is all superimposed upon on the DLBW of LTE/LTE-A.
5. a two net common mode system, it is characterized in that, this system comprises CDMA and LTE/LTE-A frequency band stacked system determining unit, LTE/LTE-A power control unit; Wherein,
Described CDMA and LTE/LTE-A frequency band stacked system determining unit, for by CDMA Signal averaging at LTE/LTE-A signal;
Described LTE/LTE-A power control unit, for the frequency spectrum at CDMA and LTE/LTE-A Signal averaging, the LTE/LTE-A signal maximum reception PSD on restriction overlapped resource; Wherein,
Described LTE/LTE-A power control unit, when limiting the LTE/LTE-A signal maximum reception PSD on overlapped resource, specifically for:
If it is PSDRxL that LTE/LTE-A receives PSD, the PSD of cdma system is PSDRxC, and the signal detecting threshold of cdma system is SINRC, then:
PSDRxC-PSDRxL–Noise>＝SINRC+InterferenceMargin；
Wherein InterferenceMargin is Cell Interference Margin;
That is: PSDRxL<=PSDRxC – Noise – SINRC-InterferenceMargin.
6. system according to claim 5, is characterized in that, described CDMA and LTE/LTE-A frequency band stacked system determining unit, during by CDMA Signal averaging on LTE/LTE-A signal, specifically for determining CDMA and LTE/LTE-A band system band stacked system.
7. system according to claim 6, is characterized in that, described CDMA and LTE/LTE-A frequency band stacked system determining unit, when determining CDMA and LTE/LTE-A band system band stacked system, specifically for:
If ULBW, DLBW of LTE/LTE-A, and FLBW, RLBW of CDMA;
Described FLBW and RLBW is superimposed upon on one of LTE/LTE-A or two frequency bands, guarantees that FLBW and RLBW is not overlapping.
8. system according to claim 7, is characterized in that, described CDMA and LTE/LTE-A frequency band stacked system determining unit, when described FLBW and RLBW being superimposed upon on one of LTE/LTE-A or two frequency bands, specifically for:
The FLBW of CDMA is superimposed upon on the DLBW of LTE/LTE-A, the RLBW of CDMA is superimposed upon on the ULBW of LTE/LTE-A, or the RLBW of CDMA is superimposed upon on the DLBW of LTE/LTE-A, the FLBW of CDMA is superimposed upon on the ULBW of LTE/LTE-A, or the frequency band of CDMA is all superimposed upon on the ULBW of LTE/LTE-A, or the frequency band of CDMA is all superimposed upon on the DLBW of LTE/LTE-A.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110103980.4A CN102761876B (en) | 2011-04-25 | 2011-04-25 | Two net common mode method and system |
| PCT/CN2011/081729 WO2012146021A1 (en) | 2011-04-25 | 2011-11-03 | Dual network common mode method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110103980.4A CN102761876B (en) | 2011-04-25 | 2011-04-25 | Two net common mode method and system |
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| Publication Number | Publication Date |
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| CN102761876A CN102761876A (en) | 2012-10-31 |
| CN102761876B true CN102761876B (en) | 2016-02-24 |
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| CN201110103980.4A Expired - Fee Related CN102761876B (en) | 2011-04-25 | 2011-04-25 | Two net common mode method and system |
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| WO (1) | WO2012146021A1 (en) |
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| CN105763232A (en) * | 2014-12-15 | 2016-07-13 | 华为技术有限公司 | Communication device and communication system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210405A (en) * | 1997-07-14 | 1999-03-10 | 三菱电机株式会社 | Mobilt communication system |
| CN1993919A (en) * | 2004-06-04 | 2007-07-04 | 高通股份有限公司 | Multiplexing of w-cdma and OFDM signal in a wireless communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070232349A1 (en) * | 2006-04-04 | 2007-10-04 | Jones Alan E | Simultaneous dual mode operation in cellular networks |
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- 2011-04-25 CN CN201110103980.4A patent/CN102761876B/en not_active Expired - Fee Related
- 2011-11-03 WO PCT/CN2011/081729 patent/WO2012146021A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210405A (en) * | 1997-07-14 | 1999-03-10 | 三菱电机株式会社 | Mobilt communication system |
| CN1993919A (en) * | 2004-06-04 | 2007-07-04 | 高通股份有限公司 | Multiplexing of w-cdma and OFDM signal in a wireless communication system |
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| WO2012146021A1 (en) | 2012-11-01 |
| CN102761876A (en) | 2012-10-31 |
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