CN101572941B - Signal transmission method based on multiple antennae and device - Google Patents
Signal transmission method based on multiple antennae and device Download PDFInfo
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- CN101572941B CN101572941B CN2009100865778A CN200910086577A CN101572941B CN 101572941 B CN101572941 B CN 101572941B CN 2009100865778 A CN2009100865778 A CN 2009100865778A CN 200910086577 A CN200910086577 A CN 200910086577A CN 101572941 B CN101572941 B CN 101572941B
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Abstract
The embodiment of the invention provides a signal transmission method based on multiple antennae, belonging to the field of communication. The method mainly comprises: channel quality information of amobile station (MS) is acquired; a launching mode of MIMO which is supported by the MS and suitable for different scenes is determined according to the channel quality information of the MS for signa l transmission. The embodiment of the invention also provides a signal transmission device based on the multiple antennae. The method and the device have the advantages of improving the transmission performance and capacity of the signal at any position of a subdistrict.
Description
Technical field
The present invention relates to the communications field, relate in particular to signal transmission technology based on many antennas.
Background technology
The present age, the development trend of mobile communcations system was in order to provide high-speed data transmission to the mobile subscriber, make under user's what state in office all can enjoy abundanter multimedia service, no matter its state be in static, at a slow speed or in the high-speed motion.All can enjoy abundanter multimedia service in order to make under user's what state in office, prior art provides a kind of many input and output (Multiple-input Multiple-output, MIMO) technology, the channel quality information that this technology basis reports (Channel quality information, CQI) selection matrix Matrix A or Matrix B carry out the signal transmission; And after adopting the MIMO technology, can improve the transmission performance and the capacity of signal significantly.The signalling formula of the MIMO technology that prior art provides is single relatively, can't satisfy in any position of sub-district and all can improve the transmission performance of signal and the requirement of capacity.
Summary of the invention
It is a kind of based on many antenna signal sending method and device that embodiment of the present invention provides, and all can improve the transmission performance and the transmission capacity of signal in any position of sub-district.
It is a kind of based on many antenna signal sending method that the specific embodiment of the present invention provides, and described method comprises: obtain the channel quality information of mobile station MS, wherein said MS supports many input and output MIMO beam forming BF radiation pattern;
When the channel quality information of the MS that obtains during less than set point, determine to carry out the signal transmission according to the channel quality information of the described MS that obtains based on the radiation pattern of MIMO, wherein said radiation pattern based on MIMO comprises the combination of MIMO BF and matrix M atrix A, perhaps the combination of MIMO BF and Matrix B;
Wherein, channel quality information and the setting threshold of described MS compared, transmit if the channel quality information that obtains smaller or equal to first setting threshold, adopts MIMO BF and the combination of matrix M atrix A to carry out signal; If the channel quality information that obtains greater than first setting threshold, then adopts MIMO BF to carry out the signal transmission; When the channel quality information that obtains during more than or equal to second setting threshold, if the order information RI that obtains more than or equal to the 3rd setting threshold less than the 4th setting threshold, adopt the combination of MIMO BF and Matrix B to carry out the signal transmission, wherein, described second setting threshold is greater than described first setting threshold.
The specific embodiment of the invention also provides a kind of sender unit based on many antennas, it is characterized in that, described device comprises:
Acquiring unit is used to obtain the channel quality information of MS, and wherein said MS supports many input and output MIMO beam forming BF radiation pattern;
Determining unit, when being used for channel quality information at MS less than set point, the channel quality information of the MS that obtains according to described acquiring unit is determined to carry out the signal transmission based on the radiation pattern of MIMO, wherein said radiation pattern based on MIMO comprises the combination of MIMO BF and matrix M atrix A, perhaps the combination of MIMO BF and Matrix B;
Described determining unit is determined to carry out the signal transmission based on the radiation pattern of MIMO according to the channel quality information of MS and the corresponding relation of radiation pattern, wherein: if the channel quality information that obtains smaller or equal to first setting threshold, adopts the combination of MIMO BF and matrix M atrix A to carry out the signal transmission; If the channel quality information that obtains greater than first setting threshold, then adopts MIMO BF to carry out the signal transmission; When the channel quality information that obtains during more than or equal to second setting threshold, if the order information RI that obtains more than or equal to the 3rd setting threshold less than the 4th setting threshold, adopt the combination of MIMO BF and Matrix B to carry out the signal transmission, described second setting threshold is greater than described first setting threshold.
A kind of base station, this base station comprise above-mentioned sender unit based on many antennas.
By the above-mentioned technical scheme that provides as can be seen, the technical scheme of the embodiment of the invention all can improve the transmission performance of signal and the advantage of transmission capacity owing to adopted the combination of MIMO BF or MIMO and Matrix A or Matrix B to carry out the signal transmission so it has in any position of sub-district.
Description of drawings
A kind of flow chart that Fig. 1 provides for one embodiment of the invention based on many antenna signal sending method;
The structure chart of a kind of sender unit based on many antennas that Fig. 2 provides for the specific embodiment of the invention.
Embodiment
It is a kind of based on many antenna signal sending method that embodiment of the present invention provides, this method mainly comprises: knowing mobile radio station (Mobile Station, when MS) supporting MIMO, obtain the channel quality information of MS,, determine to carry out the signal transmission during at this channel quality information that obtains based on the MIMO radiation pattern according to the channel quality information of the MS that obtains less than set point; Wherein the radiation pattern based on MIMO comprises MIMO beam forming BF mode, perhaps, MIMO (Beam forming, BF) with the combination of matrix M atrix A, perhaps, the combination of MIMO BF and Matrix B.
Above-mentioned channel quality information can be multiple information, as being carrier-in-interference noise ratio (Carrier-to-interference-and-noise ratio, CINR), the embodiment of the invention does not limit this, as long as this channel quality information can reflect channel quality condition.
Wherein, above-mentioned set point can be set according to actual conditions, and for example when channel quality information CINR, this set point can be 20dB, can certainly be other numerical value, and the specific embodiment of the invention does not limit this concrete value.
When the position change of MS in the sub-district, the channel quality information of MS also may change, this method can be adjusted into the combination of MIMO BF or MIMO BF and Matrix A or Matrix B with the radiation pattern of signal transmission according to the channel quality information of MS, thereby the transmission performance and the capacity of signal all can be improved in any position that is implemented in the sub-district.
For the method that the specific embodiment of the invention provides better is described, existing the present invention will be described in detail with embodiment in conjunction with the accompanying drawings.
The specific embodiment of the invention provides an embodiment, it is a kind of based on many antenna signal sending method that this embodiment provides, suppose that the radiation pattern that MS supports is: MIMO BF, matrix M atrix A and Matrix B, wherein the concrete definition of MIMO BF, Matrix A and Matrix B and description can repeat no more referring to the associated description among the agreement 802.16e herein.As shown in Figure 1, this method can comprise:
Step 11, obtain the channel quality information of MS;
When channel quality information is CINR, the acquisition methods of this channel quality information can for: according to the CINR information of this MS feedback, the number of the CINR of statistics MS feedback, when the CINR number of this MS feedback reaches first preset value, calculate the mean value of first preset value CINR, as channel quality information, this first preset value can be set according to actual needs with this mean value.The method that a period of time is added up in this method employing of adding up according to feedack is carried out data statistics, this makes that adjacent data variation several times is little, court verdict is identical, do not need to carry out the mutual of signaling this moment between BS and the MS, can think that promptly the maintenance present mode is constant, therefore can effectively lower the signaling interaction times between BS and the MS.
The acquisition methods of this channel quality information can also for, the CINR value of averaging that will obtain in the first setting-up time section is calculated, as channel quality information, the above-mentioned first setting-up time section can be set according to actual needs with this mean value.
In addition, the acquisition methods of this channel quality information can also for: with the minimum value among the CINR of the MS of setting-up time section feedback as channel quality information; Also can for the minimum value among the preset value CINR as channel quality information.
Step 12, when the channel quality information of MS during less than set point, determine to carry out the signal transmission according to the channel quality information of the MS that obtains based on the MIMO radiation pattern.
The method of performing step 12 is specifically as follows:
When the channel quality information of MS during, with the channel quality information of the MS that obtains and setting threshold relatively, determine that according to comparative result the radiation pattern of MIMO BF carries out the signal transmission less than set point.
This setting threshold can be 1 value, also can be a plurality of values, and when the radiation pattern of determining was the combined transmit mode, as MIMO BF+Matrix A or Matrix B, this setting threshold can be for a plurality of.
Particularly, can determine radiation pattern in the following manner based on MIMO:
The channel quality information of supposing MS is CINR, supposes that first setting threshold here is CINRA, then can determine the MIMO radiation pattern of MS in the following manner, thereby carries out the signal transmission:
This CINRA can get 3dB, also can be 4dB or the like, and concrete value can be set according to actual needs.
A) if the channel quality information CINR of the MS that obtains and be less than or equal to CINR A then can adopt MIMO BF+Matrix A to carry out the signal transmission.
When adopting MIMO BF+Matrix A to carry out the signal transmission, owing to adopt two kinds of signalling formulas simultaneously in carving at the same time, so transmit different packets by two kinds of send modes in can carving at the same time, thereby increased the transmission quantity of packet, improved transmission performance and capacity.And when adopting MIMO BF+MatrixA, when the BF channel estimating is inaccurate, increases and adopt diversity transmission means Matrix A, the transmission of conjugated signal on the time domain can be increased, thereby the reliability of system transmissions can be improved.
B) if the channel quality information of the MS that obtains greater than CINR A, then can adopt MIMO BF to carry out the signal transmission.
Further, if the channel quality information CINR of the MS that obtains during greater than CINR A, also can determine the radiation pattern based on MIMO in the following manner:
As the CINR that obtains during greater than the second setting threshold CINRB, the order information RI of the MS that obtains, wherein, CINRB can that is to say CINR A＜CINR B＜set point greater than CINR A, and the value of CINRB is specifically as follows 12dB, 13dB, 14dB or the like; In the specific embodiment of the invention value of CINR B setting threshold is not enumerated one by one, its concrete value can be set according to actual needs.
If the channel quality information CINR of the MS that obtains is more than or equal to CINR B, and the RI value that satisfies MS simultaneously during more than or equal to the 3rd setting threshold RI A and less than the 4th setting threshold RI B (wherein, the value of RI A, RI B concrete respectively can for: 1,2, perhaps also can be 1.1,1.5), can adopt MIMOBF+Matrix B to carry out the signal transmission.When adopting MIMO BF+Matrix B to carry out the signal transmission, owing to adopt two kinds of signalling formulas simultaneously in carving at the same time, transmit different packets by two kinds of send modes in can carving at the same time, thereby increased the transmission quantity of packet, improved transmission performance and capacity.
If the channel quality information CINR of the MS that obtains is during less than CINR B and greater than CINR A, perhaps, if the channel quality information CINR of the MS that obtains is more than or equal to CINR B, and the RI value of MS is during less than the 3rd setting threshold RI A, perhaps, if the channel quality information CINR of the MS that obtains is more than or equal to CINRB, and the RI value of MS can adopt MIMO BF radiation pattern to carry out signal and transmit during greater than the 4th setting threshold RI B.
Need to prove that the channel quality information obtain manner of MS can repeat no more with reference to the description of front in the present embodiment herein; Above-mentioned setting threshold is all less than set point.
Optionally, above-mentioned steps 12 can also realize in the following way, set the value of MS channel quality information and the corresponding relation of radiation pattern, determine radiation pattern according to this corresponding relation, here suppose that channel quality information is CINR, when being 4dB as setting CINR, corresponding radiation pattern is, MIMO BF can certainly have other corresponding relation.Its concrete corresponding relation can be shown in table 1, table 2:
Table 1
| CINR (dB) | Radiation pattern |
| 1 | MIMO?BF+Matrix?A |
| 2 | MIMO?BF+Matrix?A |
| 3 | MIMO?BF+Matrix?A |
| 4 | MIMO?BF |
| 5 | MIMO?BF |
| 6 | MIMO?BF |
| 7 | MIMO?BF |
| 8 | MIMO?BF |
| 9 | MIMO?BF |
| 10 | MIMO?BF |
| 11 | MIMO?BF |
| 12 | MIMO?BF |
| 13 | MIMO?BF |
| 14 | MIMO?BF |
| 15 | MIMO?BF |
| 16 | MIMO?BF |
| 17 | MIMO?BF |
| 18 | MIMO?BF |
| 19 | MIMO?BF |
| 20 | MIMO?BF |
Table 2
| CINR (dB) | RI | Radiation pattern |
| 12 | 0.8 | MIMO?BF |
| 13 | 0.9 | MIMO?BF |
| 14 | 1 | MIMO?BF |
| 15 | 1.1 | MIMO?BF |
| 16 | 1.2 | MIMO BF+MatrixB |
| 17 | 1.4 | MIMO BF+MatrixB |
| 18 | 1.6 | MIMO BF+MatrixB |
The value of the channel quality information of present embodiment by obtaining MS, and the value of the channel quality information of this MS that obtains compared with preset threshold or search the corresponding radiation pattern of this value according to the value and the corresponding relation of the channel quality information of the MS that obtains, and determine the radiation pattern of MIMO, thereby the transmission performance and the capacity of signal have been realized all improving in any position of sub-district according to comparative result or lookup result.
Need to prove, in the method for the embodiment of the invention, can be when the MS access network, obtain the ability information of this MS, judge according to this ability information whether MS supports MIMO BF radiation pattern, if this MS supports MIMO BF radiation pattern, then can determine to carry out the mode that signal sends by above-mentioned method to MS.
The specific embodiment of the invention also provides a kind of sender unit based on many antennas, and this installs as shown in Figure 2, can comprise: acquiring unit 21, be used to obtain the channel quality information of MS, and wherein MS supports many input and output MIMO beam forming BF radiation pattern; Determining unit 22 is used at this channel quality information that obtains during less than set point, and the channel quality information of this MS that obtains according to acquiring unit 21 determines that the MIMO radiation pattern carries out the signal transmission; Wherein should comprise MIMO beam forming BF mode based on the radiation pattern of MIMO, perhaps, the combination of MIMO BF and matrix M atrix A, perhaps, the combination of MIMO BF and Matrix B.The concrete value of above-mentioned set point can be referring to the description among the method embodiment.
Optionally, determining unit 22 specifically can comprise: comparison module 221 is used for channel quality information and the setting threshold of this MS are compared; Determination module 222 is used for determining to determine to carry out the signal transmission based on the radiation pattern of MIMO according to comparative result according to the comparative result of comparison module 221.Wherein concrete definite mode can not given unnecessary details referring to the associated description in the above-mentioned steps 12 herein.
Optionally, above-mentioned determining unit 22 also is used for determining to carry out the signal transmission based on the radiation pattern of MIMO according to the channel quality information of MS and the corresponding relation of radiation pattern.
The specific embodiment of the invention provides a kind of sender unit based on many antennas, obtain the channel quality information of MS by acquiring unit 21 after, determine the radiation pattern that MS supports by determining unit 22 according to this MS channel quality information, thereby realized all improving the transmission performance and the capacity of signal in any position of sub-district based on MIMO.
Above-mentioned sender unit based on many antennas can be positioned at the base station.
In sum, the technical scheme that the specific embodiment of the invention provides has in any position of sub-district and all can improve the transmission performance of signal and the advantage of 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 (5)
1. one kind based on many antenna signal sending method, it is characterized in that described method comprises:
Obtain the channel quality information of mobile station MS, wherein said MS supports many input and output MIMO beam forming BF radiation pattern;
When the channel quality information of the MS that obtains during less than set point, determine to carry out the signal transmission according to the channel quality information of the described MS that obtains based on the radiation pattern of MIMO, wherein said radiation pattern based on MIMO comprises the combination of MIMO BF and matrix M atrix A, perhaps the combination of MIMO BF and Matrix B;
Wherein, channel quality information and the setting threshold of described MS compared, transmit if the channel quality information that obtains smaller or equal to first setting threshold, adopts MIMO BF and the combination of matrix M atrix A to carry out signal; If the channel quality information that obtains greater than first setting threshold, then adopts MIMO BF to carry out the signal transmission;
When the channel quality information that obtains during more than or equal to second setting threshold, if the order information RI that obtains more than or equal to the 3rd setting threshold less than the 4th setting threshold, adopt the combination of MIMO BF and Matrix B to carry out the signal transmission, wherein, described second setting threshold is greater than described first setting threshold.
2. method according to claim 1 is characterized in that, the definite radiation pattern based on MIMO of the channel quality information of the MS that described basis is obtained carries out the signal transmission and comprises:
According to the channel quality information of MS and the corresponding relation of radiation pattern, determine to carry out the signal transmission based on the radiation pattern of MIMO.
3. the sender unit based on many antennas is characterized in that, described device comprises:
Acquiring unit is used to obtain the channel quality information of MS, and wherein said MS supports many input and output MIMO beam forming BF radiation pattern;
Determining unit, when being used for channel quality information at MS less than set point, the channel quality information of the MS that obtains according to described acquiring unit is determined to carry out the signal transmission based on the radiation pattern of MIMO, wherein said radiation pattern based on MIMO comprises the combination of MIMO BF and matrix M atrix A, perhaps the combination of MIMO BF and Matrix B;
Described determining unit is determined to carry out the signal transmission based on the radiation pattern of MIMO according to the channel quality information of MS and the corresponding relation of radiation pattern, wherein:
If the channel quality information that obtains smaller or equal to first setting threshold, adopts the combination of MIMO BF and matrix M atrix A to carry out the signal transmission; If the channel quality information that obtains greater than first setting threshold, then adopts MIMO BF to carry out the signal transmission;
When the channel quality information that obtains during more than or equal to second setting threshold, if the order information RI that obtains more than or equal to the 3rd setting threshold less than the 4th setting threshold, adopt the combination of MIMO BF and Matrix B to carry out the signal transmission, described second setting threshold is greater than described first setting threshold.
4. device according to claim 3 is characterized in that, described determining unit comprises:
Comparison module is used for channel quality information and the setting threshold of described MS are compared;
Determination module is used for determining to carry out the signal transmission based on the radiation pattern of MIMO according to the comparative result of described comparison module.
5. a base station is characterized in that, this base station comprises as claim 3 or 4 described sender units based on many antennas.
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| CN102104406B (en) * | 2009-12-22 | 2014-07-02 | 中兴通讯股份有限公司 | Method and system for switching beam forming and MIMO (Multi-Input Multi-Output) beam forming |
| CN104283620A (en) * | 2013-07-10 | 2015-01-14 | 中兴通讯股份有限公司 | Communication method utilizing reconfigurable antennas and terminal |
| CN110247961A (en) * | 2019-05-28 | 2019-09-17 | 国网江苏省电力有限公司电力科学研究院 | A kind of mixed communication method and system applied to electric power Internet of Things |
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