CN101964987A - Multi-user space division judgment method and equipment - Google Patents
Multi-user space division judgment method and equipment Download PDFInfo
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- CN101964987A CN101964987A CN2009100898095A CN200910089809A CN101964987A CN 101964987 A CN101964987 A CN 101964987A CN 2009100898095 A CN2009100898095 A CN 2009100898095A CN 200910089809 A CN200910089809 A CN 200910089809A CN 101964987 A CN101964987 A CN 101964987A
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Abstract
The invention discloses a multi-user space division judgment method and multi-user space division judgment equipment. The method comprises the following steps of: determining a remote radio unit (RRU) to which each user belongs and determining that different users belonging to the RRU can be subjected to space division; and further, determining whether users belonging to the same RRU can be subjected to the space division or not according to the arrival angle of each user. By implementing the method and the equipment, the space division judgment of the users still can be performed under the conditions of extending the coverage area of a cell in outdoor environment and increasing the number of the RRUs, so that the capacity of a system is improved.
Description
Technical field
The present invention relates to wireless communication technology, particularly a kind of multi-user space divides determination methods and equipment.
Background technology
In present existing mobile communication system, basic resource units is generally frequency resource, time resource and sign indicating number resource, based on these basic frequency spectrum resources, can carry out FDM (Frequency Division Mutiplexing, frequency division multiplexing), TDM (Time Division Multiplexing, time division multiplexing), the combination of CDMA (Code Division Multiple Access, code division multiple access) or several multiplex modes.SDM (Space Division Multiplex, space division multiplexing) is meant and on the basis of above multiplex mode basic resource units is carried out multiplexing form.The introducing space division multiplexing is exactly the Radio Resource for the more efficient use preciousness.
TD-SCDMA (Time Division Synchronized Code Division Multiple Access, the time-division synchronous CDMA system) mobile communication system uplink and downlink link adopts identical frequency, it is approximate identical that the space covariance matrix of uplink downlink can be thought, this means that the space covariance matrix that estimates from up link can be used for the wave beam forming of down link.
In outdoor empty the branch, whether can the empty judgement that divides for the user, be based on DOA (Direction Of Arrival, the angle of arrival) angle and carry out.
In practice, can define the isolation between the user, it has reacted the reusable degree between two users.Isolation is big more, disturbs more little when then two users are multiplexing.And define isolation matrix between all users.The method of calculating isolation is as follows:
When investigating the isolation of user DOA, directly with the difference of two users DOA estimated result isolation as the user.If the DOA estimated result of user i is θ
i, the DOA estimated result of user j is θ
j, user i then, the isolation between the j is:
The judgement of above-mentioned isolation is to belong to the judgement of carrying out under the situation of same set of smart antenna at different user.Increase along with demand, have the many covers smart antenna that belongs to same sub-district in some specific regions, be RRU (Radio Remote Unit, Remote Radio Unit), many cover RRU can cover different zones, increase the coverage of sub-district, many cover RRU can send and receive processing simultaneously to the signal in this sub-district, when upstream data is handled, before decoding, the detection signal of the same subscriber of a plurality of base stations of receiving merged and obtain diversity gain, when downlink data was handled, a plurality of base stations sent signal to same terminal and obtain diversity gain.Adopt a BBU (BaseBand Unit, baseband processing unit) to support the mode of a plurality of RRU to carry out the transmitting-receiving of signal in the present TD-SCDMA network, can increase the coverage of sub-district like this, obtain diversity gain.In the sub-district that many cover RRU are arranged, if also will support the multi-user space offshoot program, improve the capacity of sub-district, just need to consider how to judge whether multi-user space branch condition satisfies, and needs to give the determination methods that makes new advances.Yet the deficiencies in the prior art are, at present not under many RRU situation, to whether satisfying the judgement scheme of empty branch condition.
Summary of the invention
The invention provides a kind of multi-user space branch determination methods and equipment, increase under the situation of RRU number, can not carry out the empty problem of judging of dividing in order under outdoor environment, to enlarge the coverage of sub-district in the solution prior art.
A kind of multi-user space branch determination methods is provided in the embodiment of the invention, has comprised the steps:
Determine the RRU of each user attaching;
Determine emptyly to divide between the different user of ownership RRU.
Preferably, when determining the RRU of each user attaching, determine according to the quality information of each user on each RRU.
Preferably, described quality information comprises: RSCP (Received Signal Code Power, received signal code power) and/or SNR (Signal-to-Noise Ratio, signal to noise ratio);
When determining, comprising according to the quality information of each user on each RRU:
Determine each user's a RRU, the RRU under the RSCP of the maximum that a described RRU is each user and/or the SNR;
Determine each user's the 2nd RRU, described the 2nd RRU is for to be no more than the RSCP of first threshold value and/or the 2nd RRU under the SNR with the RSCP of maximum and/or the difference of SNR;
The RRU and the 2nd RRU that determine each user are this user's ownership RRU.
Preferably, when determining the RRU of each user attaching, determine when satisfying one of following condition or its combination:
Have new access the user, the user that stops to insert arranged, the user that moves to another RRU overlay area is arranged, arrive Preset Time apart from determined last time time.
Preferably, further comprise:
For the user of the same RRU of ownership, determine whether and emptyly to divide according to each user's DOA angle.
Preferably, determine whether and can emptyly divide, comprising according to each user's DOA angle:
Obtain user's channel estimating according to each user's uplink channel information;
Obtain each user's DOA angle according to channel estimating;
The isolation of determining each user is
Wherein, the DOA estimated result of user i is θ
i, the DOA estimated result of user j is θ
j
Determine that isolation is greater than can emptyly dividing between the user of second threshold value.
A kind of multi-user space branch judgment device also is provided in the embodiment of the invention, has comprised:
Belong to determination module, be used for determining the RRU of each user attaching;
The first empty judge module that divides is used for determining can emptyly dividing between the different user of ownership RRU.
Preferably, described ownership determination module is further used for determining according to the quality information of each user on each RRU when determining the RRU of each user attaching.
Preferably, described quality information comprises: RSCP and/or SNR;
Described ownership determination module comprises:
First determining unit is used for determining each user's a RRU, the RRU that the RSCP of the maximum that a described RRU be each user and/or SNR are affiliated;
Second determining unit is used for determining each user's the 2nd RRU, and described the 2nd RRU is for to be no more than the RSCP of first threshold value and/or the 2nd RRU under the SNR with the RSCP of maximum and/or the difference of SNR;
The 3rd determining unit is used for determining that each user's a RRU and the 2nd RRU are this user's ownership RRU.
Preferably, described ownership determination module is further used for determining the RRU of each user attaching when satisfying one of following condition or its combination:
Have new access the user, the user that stops to insert arranged, the user that moves to another RRU overlay area is arranged, arrive Preset Time apart from determined last time time.
Preferably, further comprise:
The second empty judge module that divides is used for the user for the same RRU of ownership, determines whether and can emptyly divide according to each user's DOA angle.
Preferably, the described second empty judge module that divides comprises:
Channel estimating unit is used for obtaining according to each user's uplink channel information user's channel estimating;
The angle acquiring unit is used for obtaining according to channel estimating each user's DOA angle;
The isolation determining unit is used for determining that each user's isolation is
Wherein, the DOA estimated result of user i is θ
i, the DOA estimated result of user j is θ
j
The empty judging unit that divides is used for determining that isolation is greater than can emptyly dividing between the user of second threshold value.
Beneficial effect of the present invention is as follows:
In the invention process, behind the RRU that determines each user attaching, just determine emptyly to divide between the different user of ownership RRU.
Further, for the user of the same RRU of ownership, determine whether and emptyly to divide according to each user's DOA angle.
Since proposed in the scheme that provides of the embodiment of the invention judge according to quality information that the user who belongs to different RRUs judges whether can empty scheme of dividing, on this basis, can also further judge the empty scheme of dividing of the user who belongs to same RRU accurately in conjunction with the DOA angle information.Therefore make the present invention under outdoor environment, enlarge the coverage of sub-district and increase under the situation of RRU number, still can carry out user's sky branch judgment processing, improved the capacity of system.
Description of drawings
Fig. 1 divides determination methods implementing procedure schematic diagram for multi-user space in the embodiment of the invention;
Fig. 2 divides the judgment device structural representation for multi-user space in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
In the invention process, under the situation of many cover RRU,, can at first judge in the ownership of each RRU and distinguish RRU, can emptyly divide for the user who belongs to different RRUs according to the user in order to judge whether satisfy empty branch condition between the different user; Then, further,, judge whether and emptyly to divide according to angle information again for the user who belongs to same RRU.Describe below.
Fig. 1 divides determination methods implementing procedure schematic diagram for multi-user space, as shown in the figure, can comprise the steps: when carrying out the judgement of sky branch
Concrete enforcement to above-mentioned steps describes below.
When implementation step 101, can determine according to the quality information of each user on each RRU.
Concrete, quality information can comprise: RSCP and/or SNR;
Then when determining, can comprise according to the quality information of each user on each RRU:
Determine each user's a RRU, the RRU under the RSCP of the maximum that a described RRU is each user and/or the SNR;
Determine each user's the 2nd RRU, described the 2nd RRU is for to be no more than the RSCP of first threshold value and/or the 2nd RRU under the SNR with the RSCP of maximum and/or the difference of SNR;
The RRU and the 2nd RRU that determine each user are this user's ownership RRU.
The execution mode of the quality information judgement RRU ownership of measuring on each RRU according to each user is described with example below.
Quality information is that example describes with RSCP, when selecting other quality informations for use, presses the principle among the embodiment, chooses the relevant parameters value and implements to get final product.
If being Γ 1, the first threshold value, first threshold value of judging specifically can determine according to emulation or test result in the enforcement.Principle is when the decay difference of two RRU reaches Γ 1dB, just can satisfy two empty conditions of dividing of the user on the RRU.
The number of supposing RRU is N, at each user UE
iThe RSCP of each RRU that measures
I, j, i=1......M wherein, j=1......N, M are number of users, N is the RRU number.
The judgement of the one RRU is to UE
i, find out the affiliated RRU of its maximum RSCP, this is the RRU of UE ownership;
The judgement of the 2nd RRU is when judging whether also to belong to other RRU simultaneously, according to maximum RSCP and RSCP
I, jDifference and the first threshold value Γ 1 relatively, if be higher than thresholding, UE is described then
iDo not belong to j RRU, otherwise just belong to j RRU.
In the enforcement, when determining the RRU of each user attaching, determine when satisfying one of following condition or its combination: have new access the user, the user that stops to insert arranged, the user that moves to another RRU overlay area is arranged, arrive Preset Time apart from determined last time time.
In concrete the enforcement, when judging the RRU ownership, can set up a matrix table, as shown in the table:
| RRU1 | RRU2 | RRU3 | RRU4 | |
| UE1 | √ | × | × | × |
| UE2 | × | √ | × | × |
| UE3 | × | × | √ | √ |
| UE4 | √ | √ | × | × |
Suppose M=N=4." √ " represent this user attaching in RRU, " * " expression do not belong to.
Then by table as seen, UE1 can divide with UE2, UE3 are empty, and UE2 can divide with UE1, UE3 are empty, and UE3 can be with UE1, UE2, UE4 is empty divides, UE4 can with the empty branch of UE3.
Then can safeguard the attaching information matrix table, make it real-time update, the user that concrete can be new access, the user that stops to insert is arranged, just upgrade when the user who moves to another RRU overlay area is arranged, can also preset update time, just upgrade to the default time, the renewal Preset Time of matrix table can be to be undertaken by each subframe, also at interval L sub-frame update once, L is determined by emulation or test result.Criterion is exactly that the user who belongs to the different RRUs overlay area can do empty the branch.
Further, for the user of the same RRU of ownership, can also determine whether according to each user's DOA angle and can emptyly divide.That is,, can also further judge each user's who belongs to same RRU DOA angle,, also can carry out the sky branch if satisfy empty branch condition for determine by ownership RRU can not the empty user who divides.
In concrete the enforcement, can above-mentioned judgement user after the different RRUs ownership, judge further according to the DOA angle information whether sky divides between the user again.Such as belonging to RRU1 as user 1, user 2 belongs to RRU2, and after these two users' pairings, if the aerial array among the RRU1 is done figuration to UE1, and UE2 is when being positioned at the figuration direction at UE1 place, and can increase the interference to UE2 this moment.So can compare in the DOA angle of RRU1 and RRU2 calculating respectively to user 1 and user 2, can emptyly divide if differential seat angle greater than threshold value Γ 2, is then thought, otherwise think that the interference meeting is bigger, do not advise empty the branch.Wherein threshold value Γ 2 can determine according to emulation or test result.
Therefore, in the enforcement, determine whether and can emptyly divide, can comprise according to each user's DOA angle:
Obtain user's channel estimating h according to each user's uplink channel information
i, h
j
Obtain each user's DOA angle according to channel estimating;
The isolation of determining each user is
Wherein, the DOA estimated result of user i is θ
i, the DOA estimated result of user j is θ
j
Determine that isolation is greater than can emptyly dividing between the user of second threshold value.
Concrete, the different user that belongs to same RRU is judged empty branch condition according to the angle information of measuring.If two users do not belong to same RRU simultaneously, then think and satisfy empty condition of dividing, can directly carry out sky and divide, if belong to same RRU, also need further to judge, judge whether and can emptyly divide according to the DOA angle of calculating separately exactly.
In concrete the enforcement, can obtain the empty user's of branch channel estimating h respectively according to user's uplink channel information
i, h
j, the DOA that utilizes this channel estimating to obtain each user estimates that the DOA estimated result of establishing user i is θ
i, the DOA estimated result of user j is θ
j, user i then, the isolation between the j is:
If judging second threshold value is that Γ 3, the second threshold values can be determined according to emulation or test result.If above-mentioned isolation, thinks then that user i and j can carry out sky and divide greater than thresholding Γ 3, divide otherwise can not carry out sky.
Based on same inventive concept, a kind of multi-user space branch judgment device also is provided in the embodiment of the invention, because the principle that judgment device is dealt with problems is similar to multi-user space branch determination methods, so the enforcement of judgment device can repeat part and not give unnecessary details referring to the enforcement of method.
Fig. 2 divides the judgment device structural representation for multi-user space, as shown in the figure, can comprise in the judgment device:
Belong to determination module 201, be used for determining the RRU of each user attaching;
The first empty judge module 202 that divides is used for determining can emptyly dividing between the different user of ownership RRU.
In the enforcement, after ownership determination module 201 was determined the RRU of each user attaching, the first empty branch judge module 202 just can be determined to belong between the different user of RRU and can emptyly divide.
In the enforcement, the ownership determination module can also be further used for determining according to the quality information of each user on each RRU when determining the RRU of each user attaching.
Quality information can comprise: RSCP and/or SNR;
Then belong in the determination module and can comprise:
First determining unit is used for determining each user's a RRU, the RRU that the RSCP of the maximum that a described RRU be each user and/or SNR are affiliated;
Second determining unit is used for determining each user's the 2nd RRU, and described the 2nd RRU is for to be no more than the RSCP of first threshold value and/or the 2nd RRU under the SNR with the RSCP of maximum and/or the difference of SNR;
The 3rd determining unit is used for determining that each user's a RRU and the 2nd RRU are this user's ownership RRU.
In the enforcement, the ownership determination module can also be further used for determining the RRU of each user attaching when satisfying one of following condition or its combination:
Have new access the user, the user that stops to insert arranged, the user that moves to another RRU overlay area is arranged, arrive Preset Time apart from determined last time time.
For the user of the same RRU of ownership, can also determine whether according to each user's DOA angle and can emptyly divide.That is, can further include in the judgment device:
The second empty judge module 203 that divides is used for the user for the same RRU of ownership, determines whether and can emptyly divide according to each user's DOA angle.
In the enforcement, the second empty judge module that divides can comprise:
Channel estimating unit is used for obtaining according to each user's uplink channel information user's channel estimating;
The angle acquiring unit is used for obtaining according to channel estimating each user's DOA angle;
The isolation determining unit is used for determining that each user's isolation is
Wherein, the DOA estimated result of user i is θ
i, the DOA estimated result of user j is θ
j
The empty judging unit that divides is used for determining that isolation is greater than can emptyly dividing between the user of second threshold value.
For the convenience of describing, the each several part of the above device is divided into various modules with function or the unit is described respectively.Certainly, when enforcement is of the present invention, can in same or a plurality of softwares or hardware, realize the function of each module or unit.
By the foregoing description as can be known, provide determination methods and the equipment that multi-user space divides under a kind of outdoor environment in the embodiment of the invention.
Further proposed to judge the user attaching of different RRUs, thereby carried out empty scheme of dividing according to quality information.
Further, also proposed the user who belongs to same RRU is judged the empty scheme of dividing of user according to the DOA angle information.
Since proposed in the scheme that provides of the embodiment of the invention judge according to quality information that the user who belongs to different RRUs judges whether can empty scheme of dividing, on this basis, can also further judge the empty scheme of dividing of the user who belongs to same RRU accurately in conjunction with the DOA angle information.Therefore make the present invention under outdoor environment, enlarge the coverage of sub-district and increase under the situation of RRU number, still can carry out user's sky branch judgment processing, improved the capacity of system.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. a multi-user space divides determination methods, it is characterized in that, comprises the steps:
Determine the radio frequency remote unit RRU of each user attaching;
Determine emptyly to divide between the different user of ownership RRU.
2. the method for claim 1 is characterized in that, when determining the RRU of standby family ownership, determines according to the quality information of each user on each RRU.
3. method as claimed in claim 2 is characterized in that, described quality information comprises: received signal code power RSCP and/or signal to noise ratio snr;
When determining, comprising according to the quality information of each user on each RRU:
Determine each user's a RRU, the RRU under the RSCP of the maximum that a described RRU is each user and/or the SNR;
Determine each user's the 2nd RRU, described the 2nd RRU is for to be no more than the RSCP of first threshold value and/or the 2nd RRU under the SNR with the RSCP of maximum and/or the difference of SNR;
The RRU and the 2nd RRU that determine each user are this user's ownership RRU.
4. the method for claim 1 is characterized in that, when determining the RRU of each user attaching, determines when satisfying one of following condition or its combination:
Have new access the user, the user that stops to insert arranged, the user that moves to another RRU overlay area is arranged, arrive Preset Time apart from determined last time time.
5. as the arbitrary described method of claim 1 to 4, it is characterized in that, further comprise:
For the user of the same RRU of ownership, determine whether and emptyly to divide according to each user's angle of arrival DOA angle.
6. method as claimed in claim 5 is characterized in that, determines whether and can emptyly divide according to each user's DOA angle, comprising:
Obtain user's channel estimating according to each user's uplink channel information;
Obtain each user's DOA angle according to channel estimating; The isolation of determining each user is
Wherein, the DOA estimated result of user i is θ
i, the DOA estimated result of user j is θ
j
Determine that isolation is greater than can emptyly dividing between the user of second threshold value.
7. a multi-user space divides judgment device, it is characterized in that, comprising:
Belong to determination module, be used for determining the RRU of each user attaching;
The first empty judge module that divides is used for determining can emptyly dividing between the different user of ownership RRU.
8. judgment device as claimed in claim 7 is characterized in that, described ownership determination module is further used for determining according to the quality information of each user on each RRU when determining the RRU of each user attaching.
9. judgment device as claimed in claim 8 is characterized in that, described quality information comprises: RSCP and/or SNR;
Described ownership determination module comprises:
First determining unit is used for determining each user's a RRU, the RRU that the RSCP of the maximum that a described RRU be each user and/or SNR are affiliated;
Second determining unit is used for determining each user's the 2nd RRU, and described the 2nd RRU is for to be no more than the RSCP of first threshold value and/or the 2nd RRU under the SNR with the RSCP of maximum and/or the difference of SNR;
The 3rd determining unit is used for determining that each user's a RRU and the 2nd RRU are this user's ownership RRU.
10. judgment device as claimed in claim 7 is characterized in that, described ownership determination module is further used for determining the RRU of each user attaching when satisfying one of following condition or its combination:
Have new access the user, the user that stops to insert arranged, the user that moves to another RRU overlay area is arranged, arrive Preset Time apart from determined last time time.
11. as the arbitrary described judgment device of claim 7 to 10, it is characterized in that, further comprise:
The second empty judge module that divides is used for the user for the same RRU of ownership, determines whether and can emptyly divide according to each user's DOA angle.
12. judgment device as claimed in claim 11 is characterized in that, the described second empty judge module that divides comprises:
Channel estimating unit is used for obtaining according to each user's uplink channel information user's channel estimating;
The angle acquiring unit is used for obtaining according to channel estimating each user's DOA angle;
The isolation determining unit is used for determining that each user's isolation is
Wherein, the DOA estimated result of user i is θ
i, the DOA estimated result of user j is θ
j
The empty judging unit that divides is used for determining that isolation is greater than can emptyly dividing between the user of second threshold value.
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| CN102958145A (en) * | 2011-08-17 | 2013-03-06 | 中兴通讯股份有限公司 | Method and device for implementing uplink space-division multiple access |
| CN103249053A (en) * | 2012-02-09 | 2013-08-14 | 中兴通讯股份有限公司 | Dispatching and service configuration method and device of user equipment |
| CN103841596A (en) * | 2012-11-22 | 2014-06-04 | 中兴通讯股份有限公司 | Method and apparatus for determining UE ownership AP |
| CN105472721A (en) * | 2014-09-11 | 2016-04-06 | 上海贝尔股份有限公司 | Interference coordination method used for base station |
| CN106959443A (en) * | 2017-02-27 | 2017-07-18 | 中国人民解放军空军工程大学 | A kind of low angle target DOA estimation method and device based on spatial diversity matrix reconstruction |
| CN108370558A (en) * | 2015-12-15 | 2018-08-03 | 华为技术有限公司 | Information source determines method, resource allocation methods and device |
| CN109152048A (en) * | 2017-06-27 | 2019-01-04 | 中国移动通信有限公司研究院 | A kind of space division multiplexing method, base station and computer readable storage medium |
| WO2019170119A1 (en) * | 2018-03-07 | 2019-09-12 | 中兴通讯股份有限公司 | Signal processing method, multi-stage distributed antenna system and storage medium |
| WO2021227592A1 (en) * | 2020-05-12 | 2021-11-18 | 中兴通讯股份有限公司 | Spectrum sharing method, electronic device, and storage medium |
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