CN101854677A - Method and device for transmitting wireless signals - Google Patents
Method and device for transmitting wireless signals Download PDFInfo
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- CN101854677A CN101854677A CN200910081154A CN200910081154A CN101854677A CN 101854677 A CN101854677 A CN 101854677A CN 200910081154 A CN200910081154 A CN 200910081154A CN 200910081154 A CN200910081154 A CN 200910081154A CN 101854677 A CN101854677 A CN 101854677A
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- 230000010287 polarization Effects 0.000 claims description 56
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000001228 spectrum Methods 0.000 abstract description 13
- 238000004891 communication Methods 0.000 abstract description 3
- 238000005388 cross polarization Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 230000011664 signaling Effects 0.000 description 5
- 230000008054 signal transmission Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The embodiment of the invention provides a method and a device for transmitting wireless signals. The method and the device belong to the communication field. The method comprises a step of transmitting the wireless signals to a mobile station by adopting a first branch of a first cross-polarization antenna when the mobile station is in a marginal area of a service cell. The embodiment of the invention also provides a device and a system for transmitting the wireless signals. The method and the device have the advantages of improving capacity, improving spectrum efficiency and reducing interference.
Description
Technical field
The present invention relates to network communication field, relate in particular to method, device that a kind of wireless signal sends.
Background technology
Along with development of urbanization, travelling carriage in the city is more and more, make operator need in the city, build more website, as base station or relay station, cause the signal phase mutual interference between each website, by discovering, it is the principal element that signal disturbs that the signal of adjacent sectors disturbs, as based on OFDM (multiple access) (Orthogonal frequency division multiplex (address), OFDM (A)) wireless communication technology, it is adjacent with the interference of sector lap frequently, be that (Inter-cell interference is to influence edge travelling carriage throughput ICI) to presence of intercell interference, the key factor of whole sector capacity and spectrum efficiency.In order to reduce ICI, the method that prior art provides a kind of wireless signal to send, this method adopts partial frequency multiplexing to the cell edge travelling carriage, and (fractional frequency reuse, FFR) technology is carried out the wireless signal transmission, thereby reduces the interference of edge travelling carriage.
When realizing the scheme of prior art, the inventor finds that prior art has following technical problem:
Because the technical scheme that prior art provides adopts the FFR technology to carry out wireless signal to the edge travelling carriage and sends, so for the edge travelling carriage, difference according to multiplexing factor of n, to the assignable bandwidth of edge travelling carriage only is the 1/n of the assignable bandwidth of center travelling carriage, thereby cause the usable spectrum a resource shrinkage of system, spectrum efficiency is lower.
Summary of the invention
Method and device that embodiment of the present invention provides a kind of wireless signal to send, said method and device can make travelling carriage assignable bandwidth in edge identical with the assignable bandwidth of center travelling carriage, and can reduce presence of intercell interference, improve spectrum efficiency and capacity.
The method that the specific embodiment of the present invention provides a kind of wireless signal to send, this method comprises:
When travelling carriage is in the fringe region of Serving cell, adopt first branch of first cross polarised antenna that this travelling carriage is sent wireless signal;
Wherein, the polarization mode of this first branch, the polarization mode of second branch of second cross polarised antenna that adopts with travelling carriage to the fringe region that is in adjacent sub-district is different, and this first cross polarised antenna is served Serving cell, and this second cross polarised antenna is served adjacent sub-district.
The specific embodiment of the invention also provides a kind of dispensing device of wireless signal, and this device comprises:
Branch's acquiring unit, when being used to obtain travelling carriage to the fringe region that is in Serving cell and sending wireless signal the identification information of branch of first cross polarised antenna that should use, the polarization mode of the branch of second cross polarised antenna that the polarization mode of the branch of first cross polarised antenna that this institute should use and travelling carriage to the fringe region that is in adjacent sub-district adopt is different, wherein, this first cross polarised antenna is served Serving cell, and this second cross polarised antenna is served adjacent sub-district;
Branch's transmitting element is used for when this travelling carriage is in the fringe region of described Serving cell, uses the branch of this identification information sign that this travelling carriage is sent wireless signal.
By the above-mentioned technical scheme that provides as can be seen, when the technical scheme of the embodiment of the invention is in the fringe region of Serving cell when travelling carriage, adopt first branch of first cross polarised antenna that this travelling carriage is sent wireless signal, and keep the polarization mode of this first branch different with the polarization mode of this second branch, thereby reduced presence of intercell interference, because this method can the spectrum reuse factor be set to 1, make travelling carriage assignable bandwidth in edge identical, improved spectrum efficiency and capacity with the assignable bandwidth of center travelling carriage.
Description of drawings
The flow chart of the sending method of a kind of wireless signal that Fig. 1 provides for another embodiment of the present invention.
Fig. 2 is each regional signalling formula figure of site1 and site2.
The structure chart of the dispensing device of a kind of wireless signal that Fig. 3 provides for embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Below in conjunction with specific embodiments and the drawings the present invention is further explained.
The invention provides an embodiment, present embodiment provides a kind of sending method of wireless signal, the technology scene that present embodiment is realized is, dense city (Dense Urban), this method specifically can comprise: when travelling carriage is in the fringe region of Serving cell, adopt first branch of first cross polarised antenna that this travelling carriage is sent wireless signal; The polarization mode of second branch of second cross polarised antenna that the polarization mode of this first branch and travelling carriage to the fringe region that is in this neighbour sub-district adopt is different, above-mentioned first cross polarised antenna is served Serving cell, and above-mentioned second cross polarised antenna is served adjacent sub-district.
Above-mentioned Serving cell can be the sub-district at travelling carriage place, the Serving cell that above-mentioned adjacent sub-district can be adjacent with this Serving cell.
Optionally, know travelling carriage be in Serving cell fringe region method can for, calculate year dried make an uproar than (carrier to interference and noise ratio of travelling carriage in setting-up time, CINR) or signal to noise ratio (signal to noise ratio, SNR), as less than setting threshold value, know that then this travelling carriage is in fringe region.
Optionally, know that the method that travelling carriage is in the fringe region of Serving cell can also comprise: self the positional information that reports according to travelling carriage is known.
Optionally, when being in the fringe region of Serving cell when travelling carriage, first branch that adopts first cross polarised antenna is to before this travelling carriage transmission wireless signal, and this method can also comprise:
The polarization mode of above-mentioned first branch and above-mentioned second branch is set,, selects the polarization mode of above-mentioned first branch perhaps according to the polarization mode of above-mentioned second branch.
The concrete implementation of the above-mentioned polarization mode that first branch and second branch be set can for, the polarization mode of first branch is arranged to vertically, the polarization mode of second branch is arranged to level, can certainly be other mode, as the polarization mode of first branch being arranged to+45 degree, the polarization mode of second branch is arranged to-45 degree.
Above-mentioned polarization mode according to second branch select first branch polarization mode method can for, be vertical as the polarization mode of second branch, then can select polarization mode is first branch of level; Can certainly be by other selection mode, the specific embodiment of the invention is not limited to concrete method, only needs polarization mode different get final product of assurance according to first branch of the polarization mode selection of second branch here.
Above-mentioned steps can be finished by the base station, can certainly be finished by relay station.
When the method that one embodiment of the invention provides is in the fringe region of Serving cell when travelling carriage, adopt first branch of first cross polarised antenna that this travelling carriage is sent wireless signal, and keep the polarization mode of this first branch different with the polarization mode of this second branch, thereby reduced presence of intercell interference, because this method can the spectrum reuse factor be set to 1, make travelling carriage assignable bandwidth in edge identical, improved spectrum efficiency and capacity with the assignable bandwidth of center travelling carriage.
The present invention also provides another embodiment, present embodiment also provides a kind of sending method of wireless signal, travelling carriage in the present embodiment is that example describes with the travelling carriage, this method is to realize under the scene of OFDM (A), certainly under actual conditions, can also be other realization scene, as code division multiple access (Code Division Multiple Access, CDMA) technology or time division multiple access insert (Time Division Multiple Access, TDMA) technology is supposed to adopt horizontal polarization mode to carry out the signal transmission to the travelling carriage of adjacent cell edge region here; This method is finished by the base station, and in actual conditions, this method also can be finished by relay station.This method comprises the steps: as shown in Figure 1
Step 11, base station know that the signalling formula of the travelling carriage of adjacent cell edge region is a horizontal polarization mode;
Step 12, when the travelling carriage that is in Serving cell is positioned at fringe region, the base station is selected to adopt perpendicular polarization mode to carry out wireless signal to this travelling carriage according to above-mentioned horizontal polarization mode and is sent.
Below by Calculation Method the beneficial technical effects that further embodiment of this invention is brought is described, according to the Shannon capacity formula, to Gaussian channel, C=B*log
2(1+SNR); Calculate by reality, travelling carriage with respect to fringe region adopts the technical scheme of further embodiment of this invention to carry out the signal transmission, this SNR or CINR can improve 5～7dB, its bandwidth can keep B (bandwidth of supposing the travelling carriage of central area here is B), and the scheme of employing prior art, for the travelling carriage of fringe region, its capacity C=[B*log
2(1+SNR)]/n, wherein n is a frequency duplex factor as one, and after adopting the FFR technology, n must be greater than 1, so the capacity of another embodiment of the present invention is necessarily greater than capacity of the prior art, thereby improved capacity, because the distribution bandwidth of the travelling carriage of the fringe region of the method for further embodiment of this invention is identical with the distribution bandwidth of central area travelling carriage, so improved spectrum efficiency, and this method is different to the polarization mode that fringe region adopts with adjacent sub-district to the polarization mode that fringe region uses, thereby the signal that has reduced between the sub-district disturbs.
Be that example illustrates the concrete grammar of realizing the embodiment of the invention with two neighbor cells below, for the convenience of narrating, with two neighbor cells difference called afters, site1 and site2, each regional signalling formula of site1 and site2 as shown in Figure 2, as shown in Figure 2, for the travelling carriage of the central area of site1, adopt all branches of cross polarised antenna, be designated as: F1 * and F2 *; Wherein F1, F2 can represent the frequency that signal sends respectively, and " * " expression is adopted all branches of cross polarised antenna to carry out signal and sent; For the travelling carriage of the fringe region of site1, adopt a certain branch of cross polarised antenna, the polarization mode of this a certain branch can be designated as: F1 and F2 for-45 degree; For the travelling carriage of the central area of site2, adopt all branches of cross polarised antenna, be designated as: F1 * and F2 *; For the travelling carriage of the fringe region of site2, adopt the polarization mode different to carry out signal and send with site1, be equivalent to adopt the branch different to carry out signal and send with a certain branch, this polarization mode can be designated as: F1/ and F2/ for+45 degree.For frequency F1, because adopting different polarization modes to carry out signal, the travelling carriage of the fringe region of site1 and site2 sends, so its signal that can reduce between the neighbor cell disturbs, reduced presence of intercell interference, in like manner, for frequency F2, also can reduce the interference of minizone.And behind the employing said method, the CINR of the signal that the travelling carriage of the fringe region of site1 and site2 receives has bigger lifting, thereby has improved whole volume.
The specific embodiment of the invention also provides the signaling method in a kind of Serving cell, and this method comprises: adopt the different branches of cross polarised antenna to carry out signal to the different mobile stations in the Serving cell and send.Finish said method and can be the base station, can certainly be relay station.
Realize this method concrete mode can for, suppose to have travelling carriage A and travelling carriage B, the concrete mode that this method realizes is that the base station is adopted first branch of cross polarised antenna to carry out signal to travelling carriage A and sent, and adopts second branch of cross polarised antenna to carry out signal to travelling carriage B and sends.
Signaling method in the Serving cell that the specific embodiment of the invention provides sends owing to adopt the different branches of cross polarised antenna to carry out signal to the different mobile stations in the same services sub-district, thereby has avoided the signal between the different mobile stations to disturb.
The specific embodiment of the invention also provides a kind of dispensing device of wireless signal, and this installs as shown in Figure 3, comprises; Branch's acquiring unit 31, when being used to obtain travelling carriage to the fringe region that is in Serving cell and sending wireless signal the identification information of branch of first cross polarised antenna that should use, the polarization mode of the branch of second cross polarised antenna that the polarization mode of the branch of first cross polarised antenna that this institute should use and travelling carriage to the fringe region that is in adjacent sub-district adopt is different, wherein, this first cross polarised antenna is served Serving cell, and this second cross polarised antenna is served adjacent sub-district; Branch's transmitting element 32 is used for when this travelling carriage is in the fringe region of this Serving cell, uses the branch of this identification information sign that this travelling carriage is sent wireless signal.Optionally, this device can be positioned at the base station, can certainly be arranged in to continue the station.
Optionally, above-mentioned branch acquiring unit 31 specifically can comprise:
Branch's determining unit 312 is used for obtaining from memory cell 311 identification information of the branch of this first cross polarised antenna.
Optionally, above-mentioned branch acquiring unit 31 specifically can comprise:
Information acquisition unit 313 is used to obtain the polarization mode information of the branch of above-mentioned second cross polarised antenna that the travelling carriage of the fringe region that is in adjacent sub-district is adopted;
Branch's selected cell 314, polarization mode information according to the branch of this second cross polarised antenna, when selection sends wireless signal to the travelling carriage of the fringe region that is in Serving cell the identification information of the first cross polarised antenna branch that should use, wherein, the polarization mode of the branch of second cross polarised antenna that the polarization mode of the first cross polarised antenna branch that this institute should use and travelling carriage to the fringe region that is in adjacent sub-district adopt is different, wherein, first cross polarised antenna is served Serving cell, and second cross polarised antenna is served adjacent sub-district.
The identification information of the branch of first cross polarised antenna that institute should use when the branch's acquiring unit 31 in the device that the specific embodiment of the invention provides obtained the travelling carriage of the fringe region that is in Serving cell sent wireless signal, and guarantee that the polarization mode of branch of this first poliarizing antenna is different with polarization mode to the branch of second cross polarised antenna of the travelling carriage employing of the fringe region that is in adjacent sub-district; Branch's transmitting element 32 is used for when this travelling carriage is in the fringe region of this Serving cell, use the branch of this identification information sign that this travelling carriage is sent wireless signal, thereby reduced presence of intercell interference, because this method can the spectrum reuse factor be set to 1, make travelling carriage assignable bandwidth in edge identical, improved spectrum efficiency and capacity with the assignable bandwidth of center travelling carriage.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method can instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises one of step or its combination of method embodiment when carrying out.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
In sum, the technical scheme that the specific embodiment of the invention provides, it is identical with the assignable bandwidth of center travelling carriage to have the assignable bandwidth of the edge of making travelling carriage, thereby has improved the advantage of spectrum efficiency and capacity.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (7)
1. the method that sends of a wireless signal is characterized in that described method comprises:
When travelling carriage is in the fringe region of Serving cell, adopt first branch of first cross polarised antenna that described travelling carriage is sent wireless signal;
Wherein, the polarization mode of described first branch, the polarization mode of second branch of second cross polarised antenna that adopts with travelling carriage to the fringe region that is in adjacent sub-district is different, described first cross polarised antenna is served described Serving cell, and described second cross polarised antenna is served described adjacent sub-district.
2. method according to claim 1 is characterized in that, the fringe region that described travelling carriage is in Serving cell specifically comprises:
Make an uproar and when setting threshold value, determine that described travelling carriage is in the fringe region of Serving cell less than corresponding when carrying of described travelling carriage is dried than CINR or signal to noise ratio snr.
3. method according to claim 1 is characterized in that, when travelling carriage was in the fringe region of Serving cell, first branch that adopts first cross polarised antenna also comprised before the described travelling carriage transmission wireless signal described:
The polarization mode of described first branch and second branch is set;
Or, according to the polarization mode of described second branch, select described first branch.
4. the dispensing device of a wireless signal is characterized in that, described device comprises:
Branch's acquiring unit, when being used to obtain travelling carriage to the fringe region that is in Serving cell and sending wireless signal the identification information of branch of first cross polarised antenna that should use, the polarization mode of the branch of second cross polarised antenna that the polarization mode of the branch of described first cross polarised antenna that should use and travelling carriage to the fringe region that is in adjacent sub-district adopt is different, wherein, described first cross polarised antenna is served described Serving cell, and described second cross polarised antenna is served described adjacent sub-district;
Branch's transmitting element is used for when described travelling carriage is in the fringe region of described Serving cell, uses the branch of described identification information sign that described travelling carriage is sent wireless signal.
5. device according to claim 4 is characterized in that, described branch acquiring unit comprises:
Memory cell, when the described travelling carriage to the fringe region that is in Serving cell that is used to store setting sends wireless signal the identification information of branch of first cross polarised antenna that should use, wherein, the polarization mode of the branch of second cross polarised antenna that the polarization mode of the branch of described first cross polarised antenna that should use and travelling carriage to the fringe region that is in adjacent sub-district adopt is different, wherein, described first cross polarised antenna is served described Serving cell, and described second cross polarised antenna is served described adjacent sub-district;
Branch's determining unit is used for obtaining from described memory cell the identification information of the branch of described first cross polarised antenna.
6. device according to claim 4 is characterized in that, described branch acquiring unit comprises:
Information acquisition unit is used to obtain the polarization mode information of the branch of described second cross polarised antenna that the travelling carriage of the fringe region that is in adjacent sub-district is adopted;
Branch's selected cell, polarization mode information according to the branch of described second cross polarised antenna, when selection sends wireless signal to the travelling carriage of the fringe region that is in Serving cell the identification information of the first cross polarised antenna branch that should use, wherein, the polarization mode of the branch of second cross polarised antenna that the polarization mode of described the first cross polarised antenna branch that should use and travelling carriage to the fringe region that is in adjacent sub-district adopt is different, wherein, described first cross polarised antenna is served described Serving cell, and described second cross polarised antenna is served described adjacent sub-district.
7. according to any described device among the claim 4-6, it is characterized in that described device is positioned at base station or relay station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910081154.7A CN101854677B (en) | 2009-04-03 | 2009-04-03 | Method and device for transmitting wireless signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910081154.7A CN101854677B (en) | 2009-04-03 | 2009-04-03 | Method and device for transmitting wireless signals |
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| Publication Number | Publication Date |
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| CN101854677A true CN101854677A (en) | 2010-10-06 |
| CN101854677B CN101854677B (en) | 2014-08-13 |
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| CN200910081154.7A Expired - Fee Related CN101854677B (en) | 2009-04-03 | 2009-04-03 | Method and device for transmitting wireless signals |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104955054A (en) * | 2014-03-26 | 2015-09-30 | 普天信息技术有限公司 | Method for configuring polarization directions of base station antennae and terminal antennae |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6205337B1 (en) * | 1998-05-06 | 2001-03-20 | Alcatel Canada Inc. | Use of sectorized polarization diversity as a means of increasing capacity in cellular wireless systems |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104955054A (en) * | 2014-03-26 | 2015-09-30 | 普天信息技术有限公司 | Method for configuring polarization directions of base station antennae and terminal antennae |
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Granted publication date: 20140813 |