CN102457991B - Base station equipment - Google Patents
Base station equipment Download PDFInfo
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- CN102457991B CN102457991B CN201010514972.4A CN201010514972A CN102457991B CN 102457991 B CN102457991 B CN 102457991B CN 201010514972 A CN201010514972 A CN 201010514972A CN 102457991 B CN102457991 B CN 102457991B
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- Prior art keywords
- frequency
- base station
- local oscillator
- station equipment
- transmitter
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- 230000010355 oscillation Effects 0.000 claims abstract description 22
- 238000001228 spectrum Methods 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000010295 mobile communication Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The invention discloses base station equipment, which comprises a transmitter and a receiver, wherein the transmitter comprises a digital-to-analog converter and an intermediate-frequency transmitter; a first local oscillator is connected between the digital-to-analog converter and the intermediate-frequency transmitter in the transmitter; and the intermediate-frequency transmitter in the transmitter and the receiver share a second local oscillator. According to the base station equipment disclosed by the invention, the first local oscillator is introduced between the digital-to-analog converter and the intermediate-frequency transmitter in the transmitter, and the intermediate-frequency transmitter and the receiver share the second local oscillator, thereby ensuring that the base station can flexibly support different duplex systems by adjusting the oscillation frequency of the first local oscillator and the oscillation frequency of the second local oscillator and further the utilization rate of a frequency spectrum of the system is improved.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of base station equipment.
Background technology
Existing mobile communication system can be divided into FDD (FrequencyDivision Duplexing according to the difference of duplex mode, Frequency Division Duplexing (FDD)) system and TDD (Time Division Duplexing, time division duplex) system, wherein, the receive path of FDD system and transmission channel adopt different frequencies, and the receive path of TDD system and transmission channel adopt identical frequency.
Due to the difference of duplex mode, there is larger difference in the transceiver designs of FDD system and TDD system.The up-downgoing frequency spectrum of typical TDD system base station is identical, the rf frequency signal that transmitter and receiver uses same local oscillator to send, as shown in Figure 1.And the up-downgoing frequency spectrum of typical FDD system base station is different, and spaced, the frequency signal that transmitter and receiver can not use identical local oscillator to send, the general radio-frequency (RF) local oscillator adopting two different frequencies, as shown in Figure 2.
Realizing in process of the present invention, inventor finds prior art, and at least there are the following problems:
Typical TDD system transceiver and typical FDD system transceiver all cannot support TDD and FDD two kinds of duplex modes simultaneously, make base station transceiver cannot in the system of different duplex mode flexible Application.
Summary of the invention
The object of the present invention is to provide a kind of base station equipment, to support the system of different duplex mode, for this reason, the present invention adopts following technical scheme:
A kind of base station equipment, comprise transmitter and receiver, described transmitter comprises digital to analog converter and MF transmitter, the digital to analog converter in described transmitter and be connected to the first local oscillator between MF transmitter, and the MF transmitter in described transmitter and described receiver share the second local oscillator.
The above embodiment of the present invention, because introduce the first local oscillator between the digital to analog converter and MF transmitter of base station transmitter, and MF transmitter and receiver share the second local oscillator, thus the frequency of oscillation of adjustment first local oscillator and the second local oscillator can be passed through, enable base station support different duplex systems flexibly, improve the availability of frequency spectrum of system.
Accompanying drawing explanation
Fig. 1 is the structural representation of typical TDD system base station of the prior art;
Fig. 2 is the structural representation of typical FDD system base station of the prior art;
Fig. 3 to Figure 12 is respectively the schematic diagram of the various up-downgoing frequency range configurations that the embodiment of the present invention provides;
Figure 13 is the base station equipment structure schematic diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the present invention, carry out clear, complete description to the technical scheme in the present invention, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
In existing TDD system, uplink band and band downlink are identical.When TDD system and FDD system mixed deployment; usually reserved boundary belt between TDD frequency range and FDD frequency range; disturb to avoid the up-downgoing between different system; wherein; boundary belt between FDD uplink band and TDD frequency range is low side boundary belt, and the boundary belt between FDD band downlink and TDD frequency range is high-end boundary belt.
For improving the availability of frequency spectrum of communication system, the embodiment of the present invention proposes a kind of uplink band and the asymmetric mobile communication system of band downlink.So-called uplink band and band downlink symmetry, refer to that uplink band is identical with the bandwidth of band downlink, and point coincides.Other situations except uplink band and band downlink symmetry are asymmetric, that is, the bandwidth of uplink band and band downlink is not etc., and/or the central point of uplink band does not overlap with the central point of band downlink.
Uplink band in the embodiment of the present invention and the asymmetric mobile communication system of band downlink comprise offsetTDD system, and the up-downgoing frequency range start-stop scope of this offset TDD system is incomplete same, and up-downgoing frequency range has overlap.
Fig. 3 shows the up-downgoing frequency range configuration of a kind of typical offset TDD system that the embodiment of the present invention proposes, wherein, TDD band downlink (the TDD DL in figure) utilizes former high-end boundary belt adjacent with FDD band downlink (the FDD DL in figure), owing to there is not interference at crossed slot between the two, thus can coexist; TDD uplink band (the TDD UL in figure) utilizes former low side boundary belt adjacent with FDD uplink band (the FDD UL in figure), owing to also there is not interference at crossed slot between the two, thus can coexist.Because above-mentioned frequency range configuration mode only needs, at one-sided reserved boundary belt, to improve the availability of frequency spectrum.
Offset TDD also comprises other several similar spectrum allocation may modes, and Fig. 4 to Figure 11 respectively illustrates other several similar spectrum allocation may modes, wherein:
As shown in Figure 4, the bandwidth of up-downgoing frequency range is still identical, but the intermediate frequency of uplink band is no longer alignd with the intermediate frequency of band downlink, but has side-play amount a, and the central point of uplink band does not overlap with the central point of band downlink.
As shown in Figure 5, not etc., the HFS (right side) showing as DL does not have side-play amount c relative to UL to up-downgoing band bandwidth, and the low frequency part of UL has side-play amount b relative to DL, b is not equal to c, and the central point of uplink band does not overlap with the central point of band downlink.
As shown in Figure 6, up-downgoing band bandwidth not etc., band downlink expansion (also can regard uplink band as to shrink), and the point coincides of the central point of uplink band and band downlink.
As shown in Figure 7, up-downgoing band bandwidth not etc., uplink band expansion (also can regard band downlink as to shrink), and the central point of uplink band does not overlap with the central point of band downlink.
As shown in Figure 8, up-downgoing band bandwidth not etc., do not expand, and has 1 discontinuous point in the frequency shared by band downlink by band downlink.
As shown in Figure 9, up-downgoing band bandwidth is equal, and uplink band is expanded, and has 1 discontinuous point in the frequency shared by uplink band.
As shown in Figure 10, up-downgoing band bandwidth not etc., does not have 2 discontinuous points in the frequency shared by band downlink.
As shown in figure 11, up-downgoing band bandwidth not etc., respectively have 1 discontinuous point, and discontinuous point does not overlap completely in the frequency shared by up-downgoing frequency range.Certainly, in other execution mode of the present invention, the discontinuous point in the frequency shared by up-downgoing frequency range also can not exclusively overlap.
In uplink band in the embodiment of the present invention and the asymmetric mobile communication system of band downlink, the frequency shared by up-downgoing frequency range can also not have lap, and namely uplink band and band downlink do not overlap, as shown in figure 12.This up-downgoing frequency range configuration mode can be applicable to TDD system, also can be applied to FDD system.When being applied to TDD system, adopt the time slot configuration mode of typical TDD system, downstream transmission need meet time synchronized, and the width of up-downgoing frequency range does not require equal; When being applied to FDD system, up-downgoing bin width must be equal.
For uplink band and the asymmetric situation of band downlink of the mobile communication system in the embodiment of the present invention, it is no matter typical TDD system transceiver architecture as shown in Figure 1, still typical FDD system transceiver architecture as shown in Figure 2, all cannot support TDD and FDD two kinds of duplex modes simultaneously, more cannot support the spectrum allocation may mode of the offset TDD that the embodiment of the present invention provides.For this reason, embodiments provide one and can support TDD and FDD two kinds of duplex modes simultaneously, and the base station equipment of the spectrum allocation may mode of the offset TDD that the embodiment of the present invention can be supported to provide.
As shown in figure 13, the base station equipment that the embodiment of the present invention provides can comprise transmitter 10, receiver 20, radio-frequency (RF) front-end circuit 30 and antenna 40.Wherein, transmitter 10 can comprise digital processing element 11, DAC (Digital to Analog Converter, digital to analog converter) 12 and MF transmitter 13.Be connected to local oscillator 1 between DAC 12 in above-mentioned transmitter 10 and MF transmitter 13, MF transmitter 13 and receiver 20 share local oscillator 2, and wherein, local oscillator 1 can adopt low frequency local oscillator, and local oscillator 2 can adopt intermediate frequency local oscillator.
The frequency of oscillation of local oscillator 1 and local oscillator 2 is respectively:
f
1＝f
DL-f
UL........................[1]
f
2＝f
UL..............................[2]
Wherein, the frequency of oscillation of local oscillator 1 is f
1, the frequency of oscillation of local oscillator 2 is f
2, f
uLfor up (reception) centre frequency of base station, f
dLduring for descending (transmitting) centre frequency.Generally, the frequency of oscillation of local oscillator 1 is lower than the frequency of oscillation of local oscillator 2; Certainly, the frequency of oscillation of local oscillator 1 also can greater than or equal to the frequency of oscillation of local oscillator 2.
According to the uplink and downlink works frequency requirement adjustment f of base station
1and f
2value, above-mentioned base station can be made can to support typical TDD system and FDD system, also can support the uplink band that the embodiment of the present invention proposes and the asymmetric mobile communication system of band downlink.Particularly, f is worked as
1=0, i.e. f
dL=f
uLtime, typical TDD system can be supported in above-mentioned base station; Work as f
1≠ 0, i.e. f
dL≠ f
uLtime, uplink band and the asymmetric mobile communication system of band downlink can be supported in above-mentioned base station; Work as f
1when being greater than FDD system bandwidth, FDD system can be supported in above-mentioned base station, the frequency of oscillation f of local oscillator 1
1for the up-downgoing spectrum duplex interval of FDD system, that is, descending (transmitting) centre frequency of FDD system and the difference of up (reception) centre frequency.
Can find out according to the base station equipment that the embodiment of the present invention provides, because introduce local oscillator 1 between the DAC and MF transmitter of base station transmitter, and MF transmitter and receiver share local oscillator 2, thus can by adjusting the frequency of oscillation of local oscillator 1 and local oscillator 2, base station is enable to support various uplink band and the asymmetric mobile communication system of band downlink flexibly, improve the availability of frequency spectrum of system, and typical TDD system and FDD system can be supported, different duplex systems can be supported flexibly.For traditional technical scheme, the transformation complexity of the embodiment of the present invention to base station is less, and transformation difficulty is lower.Certainly, the arbitrary product implementing embodiments of the invention might not need to reach above-described all advantages simultaneously.
It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprising some instructions in order to make a station terminal equipment (can be mobile phone, personal computer, server, or the network equipment etc.) perform method described in each embodiment of the present invention.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should look protection scope of the present invention.
Claims (9)
1. a base station equipment, comprise transmitter and receiver, described transmitter comprises digital to analog converter and MF transmitter, it is characterized in that, digital to analog converter in described transmitter and the frequency mixer between MF transmitter are connected to the first local oscillator, and the MF transmitter in described transmitter and described receiver share the second local oscillator;
The frequency of oscillation of described first local oscillator is f
1=f
dL-f
uL, the frequency of oscillation of described second local oscillator is f
2=f
uL;
Wherein, f
1for the frequency of oscillation of described first local oscillator, f
2for the frequency of oscillation of described second local oscillator, f
uLfor the receiving center frequency of described base station equipment, f
dLfor the transmission center frequency values of described base station equipment.
2. base station equipment as claimed in claim 1, is characterized in that, the frequency of oscillation of described first local oscillator is lower than the frequency of oscillation of described second local oscillator.
3. base station equipment as claimed in claim 1, it is characterized in that, described base station equipment is applied to uplink band and the asymmetric communication system of band downlink.
4. base station equipment according to claim 3, is characterized in that, not etc., and/or the central point of uplink band does not overlap with the central point of band downlink for the bandwidth of described uplink band and band downlink.
5. the base station equipment according to claim 3 or 4, is characterized in that, described uplink band has at least one discontinuous point; Or,
Described band downlink has at least one discontinuous point; Or,
Described uplink band and at least one discontinuous point of each tool of band downlink.
6. the base station equipment according to claim 3 or 4, is characterized in that, described uplink band and band downlink respectively have a discontinuous point, and discontinuous point overlaps.
7. the base station equipment according to claim 3 or 4, is characterized in that, described uplink band and band downlink do not overlap.
8. base station equipment as claimed in claim 1, it is characterized in that, described base station equipment is applied to TDD system, and the frequency of oscillation of described first local oscillator is 0, and the frequency of oscillation of described second local oscillator is the operating frequency of described base station equipment in TDD system.
9. base station equipment as claimed in claim 1, it is characterized in that, described base station equipment is applied to FDD system, and the frequency of oscillation of described first local oscillator is greater than FDD system bandwidth, and the frequency of oscillation of described first local oscillator is the up-downgoing spectrum duplex interval of FDD system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010514972.4A CN102457991B (en) | 2010-10-14 | 2010-10-14 | Base station equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010514972.4A CN102457991B (en) | 2010-10-14 | 2010-10-14 | Base station equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102457991A CN102457991A (en) | 2012-05-16 |
| CN102457991B true CN102457991B (en) | 2015-05-27 |
Family
ID=46040476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010514972.4A Expired - Fee Related CN102457991B (en) | 2010-10-14 | 2010-10-14 | Base station equipment |
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| Country | Link |
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| CN (1) | CN102457991B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104540155B (en) * | 2014-12-15 | 2018-11-16 | 大唐移动通信设备有限公司 | A kind of base station frequency method of adjustment and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5890051A (en) * | 1997-11-19 | 1999-03-30 | Ericsson Inc. | On-channel transceiver architecture in a dual band mobile phone |
| WO2008050940A2 (en) * | 2006-10-26 | 2008-05-02 | Electronics And Telecommunications Research Institute | Wireless transceiver system for supporting dual mode |
| US20080119145A1 (en) * | 2006-11-21 | 2008-05-22 | Samsung Electronics Co., Ltd. | Hybrid duplex apparatus and method for supporting low-complexity terminal in wireless communication system |
-
2010
- 2010-10-14 CN CN201010514972.4A patent/CN102457991B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5890051A (en) * | 1997-11-19 | 1999-03-30 | Ericsson Inc. | On-channel transceiver architecture in a dual band mobile phone |
| WO2008050940A2 (en) * | 2006-10-26 | 2008-05-02 | Electronics And Telecommunications Research Institute | Wireless transceiver system for supporting dual mode |
| US20080119145A1 (en) * | 2006-11-21 | 2008-05-22 | Samsung Electronics Co., Ltd. | Hybrid duplex apparatus and method for supporting low-complexity terminal in wireless communication system |
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| Publication number | Publication date |
|---|---|
| CN102457991A (en) | 2012-05-16 |
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Granted publication date: 20150527 |
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