CN101174881A - Pilot signal emission system - Google Patents
Pilot signal emission system Download PDFInfo
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- CN101174881A CN101174881A CNA2006101378056A CN200610137805A CN101174881A CN 101174881 A CN101174881 A CN 101174881A CN A2006101378056 A CNA2006101378056 A CN A2006101378056A CN 200610137805 A CN200610137805 A CN 200610137805A CN 101174881 A CN101174881 A CN 101174881A
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- frequency
- carrier frequency
- pilot
- pilot signal
- uplink synchronous
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Abstract
The present invention provides a pilot signal emitter comprising an uplink synchronous carrier frequency setting module; M frequency point collections are chosen from N networks of frequency points as the uplink pilot frequency point candidate collection, a first frequency point is chosen out as the uplink synchronous carrier frequency; N and M are natural numbers and M is less than N; a main carrier frequency setting module which is used for taking the left (N minus M) frequency point collections as the non-uplink pilot frequency point candidate collections and b frequency point is chosen as the main carrier frequency; an auxiliary carrier frequency setting module which is used for choosing the auxiliary carrier frequency except for the frequency points a and b; a pilot emitting module which utilizes the downlink pilot signal of the main carrier frequency and the uplink synchronous carrier frequency to emit the uplink pilot signal. The present invention realizes the following beneficial effects that the interference of the downlink pilot signal on the uplink pilot signal of the mobile terminal can be prevented and the synchronous function of the mobile terminal frame is not affected; the success rate of uplink synchronization is increased, the cell radius is added and the antenna correction is optimized.
Description
Technical field
The present invention relates to the communications field, and relate more particularly to a kind of pilot signal emission system.
Background technology
According to the regulation of 3GPP (third generation partner program) standard, after downlink synchronous pilot frequency time slot DwPTS, be protection GP and uplink synchronous pilot time slot UpPTS at interval to TDD (1.28M spreading rate) frame structure.The base station is when receiving the uplink synchronous pilot tone of mobile phone emission, and the downlink synchronous pilot frequency of mobile phone emission before may reflect by this base station after emission and receive.In addition, also received through after a while propagation with the downlink synchronous pilot frequency of frequently adjacent cell base station emission by the base station.These down-bound pilot frequency signal can cause interference to the uplink synchronous of mobile phone.
Introduced the scheme of N frequency in TD-SCDMA (TD SDMA access) lining.Each sub-district is transmitting downstream synchronizing signal on main carrier frequency only all, and simultaneously, uplink synchronous is also only carried out on main carrier frequency.Because the main carrier frequency of each sub-district may be different, so this has alleviated the interference of descending pilot frequency to descending pilot frequency to a certain extent.But because same carrier can be by a plurality of sub-districts as main carrier frequency, so descending pilot frequency still exists the interference of ascending pilot frequency.
The N frequency improvement project in a nearly step is, makes transmitting downstream synchronizing signal on the main carrier frequency of sub-district, and uplink synchronous is only launched on assistant carrier frequency.But in this scheme, the assistant carrier frequency of this sub-district may be the main carrier frequency of other sub-district, so descending pilot frequency still exists the interference of ascending pilot frequency.
In addition, also the Blanking scheme of useful descending pilot frequency solves the scheme of descending pilot frequency to the interference problem of ascending pilot frequency.According to so a kind of typical scenario, the base station is according to the parity of subframe numbers alternately emission or transmitting downstream pilot signal not.Only allow portable terminal emission uplink synchronous signature in the subframe of transmitting downstream pilot tone not.But this scheme is because of transmitting downstream pilot signal not in the subframe of half, and the frame synchronization performance of portable terminal is affected.
Therefore, need a kind ofly can solve the affected technical scheme of frame synchronization that above-mentioned down-bound pilot frequency signal is disturbed uplink pilot signal and portable terminal.
Summary of the invention
Main purpose of the present invention is to provide a kind of scheme that is used to launch uplink pilot signal and down-bound pilot frequency signal, and it can overcome owing to the defective of correlation technique and the not enough down-bound pilot frequency signal interference uplink pilot signal that causes and the affected problem of frame synchronization of portable terminal.
To achieve these goals, the invention provides a kind of pilot signal emission system, comprise: the uplink synchronous carrier frequency is provided with module, the set of choosing M frequency in the networking of N frequency is as ascending pilot frequency frequency Candidate Set, and therefrom select first frequency as the uplink synchronous carrier frequency, wherein, N and M are natural number and M＜N; Main carrier frequency is provided with module, and the set of the frequency of the residue N-M in the networking as non-ascending pilot frequency frequency Candidate Set, and is therefrom chosen frequency b as main carrier frequency; Assistant carrier frequency is provided with module, selects other assistant carrier frequency in the carrier frequency except frequency a and frequency b; And the pilot transmission module, use main carrier frequency transmitting downstream pilot signal, and use uplink synchronous carrier frequency emission uplink pilot signal.
Wherein, emission system broadcast on main carrier frequency, the portable terminal in the using system broadcast notifying cell is emission uplink synchronous signature on the uplink synchronous carrier frequency only.
In networking is under the situation of single carrier frequency networking, makes all sub-districts use frequency f
1Emission system broadcast and descending pilot frequency, and make each sub-district will be different from frequency f respectively
1Frequency as the uplink synchronous frequency of this sub-district, wherein, the uplink synchronous frequency of each sub-district can be identical or different.Portable terminal in each sub-district is emission uplink synchronous signature on the uplink synchronous frequency only.
In this case, a transceiver is only used in the base station, and transceiver is at frequency f
1Transmitting downstream business, system broadcast message and descending pilot frequency, reception uplink service are monitored the ascending pilot frequency signature on the uplink synchronous frequency.
Pass through technique scheme, the present invention has realized following beneficial effect: avoided the interference of down-bound pilot frequency signal to the portable terminal uplink pilot signal, and do not influence the net synchronization capability of portable terminal frame, improved the success rate of uplink synchronous, increase radius of society and optimized the antenna correction, in addition, the present invention is identical with existing 3GPP technical specification, so it implements effectively simple.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the pilot signal transmitting method of the embodiment of the invention; And
Fig. 2 is the block diagram according to the pilot signal emission system of the embodiment of the invention.
Embodiment
Describe the present invention below with reference to the accompanying drawings in detail.
Fig. 1 is the flow chart that illustrates according to the pilot signal transmitting method of the embodiment of the invention.Pilot signal transmitting method may further comprise the steps: step S102, and the set of choosing M frequency in the networking of N frequency is as ascending pilot frequency frequency Candidate Set, and therefrom selects frequency a as the uplink synchronous carrier frequency, and wherein, N and M are natural number and M＜N; Step S104 as non-ascending pilot frequency frequency Candidate Set, and therefrom chooses frequency b as main carrier frequency with the set of the frequency of the residue N-M in the networking; Step S106 selects other assistant carrier frequency in the carrier frequency except frequency a and frequency b; And step S108, use main carrier frequency transmitting downstream pilot signal, and use uplink synchronous carrier frequency emission uplink pilot signal.
Should be noted in the discussion above that above-mentioned steps only is exemplary, and be not used in restriction the present invention, for example, can select non-ascending pilot frequency frequency Candidate Set earlier, select ascending pilot frequency frequency Candidate Set then, as long as can realize effect of the present invention, can carry out various changes to above-mentioned steps.
Except frequency a and frequency b, other a N-2 frequency is assistant carrier frequency.
Wherein, go up the emission system broadcast at main carrier frequency (frequency b), the portable terminal in the using system broadcast notifying cell is emission uplink synchronous signature on the uplink synchronous carrier frequency only.
Like this, down-bound pilot frequency signal is used different frequencies respectively with uplink pilot signal, and down-bound pilot frequency signal can not disturbed uplink pilot signal.
For example, four frequencies are being arranged, that is, and frequency f
1, f
2, f
3, f
4Situation under, in step S102, select frequency f
4Form ascending pilot frequency frequency Candidate Set frequency, and in step S104, select frequency f
1, f
2, f
3Form non-ascending pilot frequency frequency Candidate Set, then in three sector A, B of a base station, C:
Sector A frequency f
1Do main carrier frequency, system broadcast message and descending pilot frequency are at f
1Last emission, frequency f
4Do the ascending pilot frequency frequency, frequency f
2, f
3, f
4It all is assistant carrier frequency.
Sector B frequency f
2Do main carrier frequency, system broadcast message and descending pilot frequency are at f
2Last emission, frequency f
4Do the ascending pilot frequency frequency, frequency f
1, f
3, f
4It all is assistant carrier frequency.
Sector C frequency f
3Do main carrier frequency frequently, system broadcast message and descending pilot frequency are at f
3Last emission, frequency f
4Do the ascending pilot frequency frequency, frequency f
1, f
2, f
4It all is assistant carrier frequency.
Different code characters is used in these three sectors, like this, though the use of the uplink synchronous that the portable terminal in the different sector is initiated signature is identical frequency, in different code characters, can not be confused.
In networking is under the situation of single carrier frequency networking, makes all sub-districts use frequency f
1Emission system broadcast and descending pilot frequency, and make each sub-district will be different from frequency f respectively
1Frequency as the uplink synchronous frequency of this sub-district, wherein, the uplink synchronous frequency of each sub-district can be identical or different.Portable terminal in each sub-district is emission uplink synchronous signature on the uplink synchronous frequency only.
In this case, the base station can two transceivers, and only use a transceiver, and transceiver is at frequency f
1Last transmitting downstream business, system broadcast message and descending pilot frequency, reception uplink service are monitored the ascending pilot frequency signature on the uplink synchronous frequency.
Fig. 2 is the block diagram that illustrates according to the pilot signal emission system of the embodiment of the invention.As shown in Figure 2, pilot signal emission system 200 comprises: the uplink synchronous carrier frequency is provided with module 202, and the set of choosing M frequency in the networking of N frequency is as ascending pilot frequency frequency Candidate Set, and therefrom selects first frequency as the uplink synchronous carrier frequency, wherein, N and M are natural number and M＜N; Main carrier frequency is provided with module 204, and the set of the frequency of the residue N-M in the networking as non-ascending pilot frequency frequency Candidate Set, and is therefrom chosen frequency b as main carrier frequency; Assistant carrier frequency is provided with module 206, selects other assistant carrier frequency in the carrier frequency except frequency a and frequency b; And pilot transmission module 208, use main carrier frequency transmitting downstream pilot signal, and use uplink synchronous carrier frequency emission uplink pilot signal.
Wherein, all right emission system broadcast on main carrier frequency, the portable terminal in the using system broadcast notifying cell is emission uplink synchronous signature on assistant carrier frequency only.
For example, four frequencies are being arranged, that is, and frequency f
1, f
2, f
3, f
4Situation under, the uplink synchronous carrier frequency selects module 202 to select frequency f
4Form ascending pilot frequency frequency Candidate Set frequency, and main carrier frequency selects module 204 to select frequency f
1, f
2, f
3Form non-ascending pilot frequency frequency Candidate Set, then in three sector A, B of a base station, C:
Sector A frequency f
1Do main carrier frequency, system broadcast message and descending pilot frequency are at f
1Last emission, frequency f
4Do the ascending pilot frequency frequency, frequency f
2, f
3, f
4It all is assistant carrier frequency.
Sector B frequency f
2Do main carrier frequency, system broadcast message and descending pilot frequency are at f
2Last emission, frequency f
4Do the ascending pilot frequency frequency, frequency f
1, f
3, f
4It all is assistant carrier frequency.
Sector C frequency f
3Do main carrier frequency frequently, system broadcast message and descending pilot frequency are at f
3Last emission, frequency f
4Do the ascending pilot frequency frequency, frequency f
1, f
2, f
4It all is assistant carrier frequency.
Different code characters is used in these three sectors, like this, though the use of the uplink synchronous that the portable terminal in the different sector is initiated signature is identical frequency, in different code characters, can not be confused.
In networking is under the situation of single carrier frequency networking, makes all sub-districts use frequency f
1Emission system broadcast and descending pilot frequency, and make each sub-district will be different from frequency f respectively
1Frequency as the uplink synchronous frequency of this sub-district, wherein, the uplink synchronous frequency of each sub-district can be identical or different.Portable terminal in each sub-district is emission uplink synchronous signature on the uplink synchronous frequency only.
In this case, a transceiver is only used in the base station, and transceiver is monitored the ascending pilot frequency signature at frequency f1 transmitting downstream business, system broadcast message and descending pilot frequency, reception uplink service on the uplink synchronous frequency.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a pilot signal emission system is characterized in that, comprising:
The uplink synchronous carrier frequency is provided with module, and the set of choosing M frequency in the networking of N frequency is as ascending pilot frequency frequency Candidate Set, and therefrom selects first frequency as the uplink synchronous carrier frequency, and wherein, N and M are natural number and M＜N;
Main carrier frequency is provided with module, and the set of the frequency of the residue N-M in the described networking as non-ascending pilot frequency frequency Candidate Set, and is therefrom chosen frequency b as main carrier frequency;
Assistant carrier frequency is provided with module, selects other assistant carrier frequency in the carrier frequency except described frequency a and frequency b; And
The pilot transmission module is used described main carrier frequency transmitting downstream pilot signal, and uses described uplink synchronous carrier frequency emission uplink pilot signal.
2. pilot signal emission system according to claim 1 is characterized in that, described pilot transmission module emission system broadcast on described main carrier frequency.
3. pilot signal emission system according to claim 2 is characterized in that, uses the portable terminal in the described system broadcast message notifying cell only to launch the uplink synchronous signature on described uplink synchronous carrier frequency.
4. pilot signal emission system according to claim 1 is characterized in that, is under the situation of single carrier frequency networking in described networking, makes all sub-districts use frequency f
1Emission system broadcast and descending pilot frequency, and make each sub-district will be different from frequency f respectively
1Frequency as the uplink synchronous frequency of this sub-district.
5. pilot signal emission system according to claim 4 is characterized in that, the described uplink synchronous frequency in each district can be identical or different.
6. pilot signal emission system according to claim 4 is characterized in that, the portable terminal in each sub-district is emission uplink synchronous signature on described uplink synchronous frequency only.
7. pilot signal emission system according to claim 4 is characterized in that, a transceiver is only used in the base station, and described transceiver is at described frequency f
1Transmitting downstream business, system broadcast message and descending pilot frequency, reception uplink service are monitored the ascending pilot frequency signature on described uplink synchronous frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101378056A CN101174881A (en) | 2006-11-01 | 2006-11-01 | Pilot signal emission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101378056A CN101174881A (en) | 2006-11-01 | 2006-11-01 | Pilot signal emission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101174881A true CN101174881A (en) | 2008-05-07 |
Family
ID=39423179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101378056A Withdrawn CN101174881A (en) | 2006-11-01 | 2006-11-01 | Pilot signal emission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101174881A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010069259A1 (en) * | 2008-12-17 | 2010-06-24 | 华为技术有限公司 | A carrier wave converging method in a fdd system and a device thereof, and a method for obtaining upward/downward channels reciprocity and a device thereof |
| CN102546136A (en) * | 2008-12-17 | 2012-07-04 | 华为技术有限公司 | Carrier aggregation method and device in frequency division duplex (FDD) |
| CN102598752A (en) * | 2008-06-04 | 2012-07-18 | 诺基亚公司 | Interference avoidance on common channels in uncoordinated network deployments with flexible spectrum use |
-
2006
- 2006-11-01 CN CNA2006101378056A patent/CN101174881A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102598752A (en) * | 2008-06-04 | 2012-07-18 | 诺基亚公司 | Interference avoidance on common channels in uncoordinated network deployments with flexible spectrum use |
| WO2010069259A1 (en) * | 2008-12-17 | 2010-06-24 | 华为技术有限公司 | A carrier wave converging method in a fdd system and a device thereof, and a method for obtaining upward/downward channels reciprocity and a device thereof |
| CN102546136A (en) * | 2008-12-17 | 2012-07-04 | 华为技术有限公司 | Carrier aggregation method and device in frequency division duplex (FDD) |
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| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |