CN107135481B - The resource allocation methods and device of remote radio unit common community - Google Patents
The resource allocation methods and device of remote radio unit common community Download PDFInfo
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- CN107135481B CN107135481B CN201710346276.9A CN201710346276A CN107135481B CN 107135481 B CN107135481 B CN 107135481B CN 201710346276 A CN201710346276 A CN 201710346276A CN 107135481 B CN107135481 B CN 107135481B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0289—Congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiment of the invention discloses a kind of resource allocation methods of remote radio unit common community and devices.This method comprises: being total to the physical site in cell for radio frequency remote unit RRU, detect whether that user terminal is in the edge of the signal cover for the RRU that the physical site includes；If having detected the resource allocation for the RRU that user terminal is in the edge, only includes by the physical site to the user terminal in the edge.The resource allocation methods and device of the remote radio unit common community of the embodiment of the present invention can be improved the capacity that RRU is total to cell, and then reduce business obstruction.
Description
Technical field
The present invention relates to mobile communication technology field more particularly to a kind of resource allocation sides of remote radio unit common community
Method and device.
Background technique
Remote Radio Unit (Radio Remote Unit, RRU) is total to cellular technology and is developed based on distribution-type base station architecture,
It is zoomed out by RRU, multiple set of locations under a baseband processing unit (Building Base band Unit, BBU) are physically
It adheres to different sites separately, logically belongs to the same cell.
Currently, RRU, which is total to cellular technology, is mainly used in three scenes, high-speed rail covering scene, tunnel coverage scene and interior
Covering scene.
For high-speed rail covering scene, when entering RRU there are two above train and being total to cell, RRU is total in cell
RRU sends control information and business information to the user terminal of all trains simultaneously, i.e., the user terminal of all trains shares RRU
Resource in cell altogether.Due to resource sharing, it is easy to business be caused to be blocked.In addition, if train is located at the edge that RRU is total to cell
(i.e. cell switching spike zone), a large amount of hand off signaling can also occupy the resource that RRU is total in cell, also result in business resistance
Plug.
To sum up, there are problems that business obstruction in the prior art.
Summary of the invention
The embodiment of the present invention provides the resource allocation methods and device of a kind of remote radio unit common community, can reduce industry
Business obstruction.
On the one hand, the embodiment of the invention provides a kind of resource allocation methods of remote radio unit common community, method packets
It includes:
It is total to the physical site in cell for RRU, detects whether that user terminal is in the RRU that the physical site includes
The edge of signal cover；
If having detected the resource allocation for the RRU that user terminal is in the edge, only includes by the physical site to place
User terminal in the edge.
On the other hand, the embodiment of the invention provides a kind of resource allocation device of remote radio unit common community, devices
It include: detection module and distribution module, wherein
Detection module has detected whether that user terminal is in the physical station for being total to the physical site in cell for RRU
The edge of the signal cover for the RRU that point includes；
Distribution module, in the case where detection module has detected that user terminal is in the edge, only by the physics
The resource allocation for the RRU that website includes gives the user terminal in the edge.
It is small altogether to can be improved RRU for the resource allocation methods and device of the remote radio unit common community of the embodiment of the present invention
The capacity in area, and then reduce business obstruction.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, for those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 shows the first stream of the resource allocation methods of remote radio unit common community provided in an embodiment of the present invention
Journey schematic diagram；
Fig. 2 shows second of streams of the resource allocation methods of remote radio unit common community provided in an embodiment of the present invention
Journey schematic diagram；
Fig. 3 shows the first knot of the resource allocation device of remote radio unit common community provided in an embodiment of the present invention
Structure schematic diagram；
Fig. 4 shows second of knot of the resource allocation device of remote radio unit common community provided in an embodiment of the present invention
Structure schematic diagram.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below, in order to make mesh of the invention
, technical solution and advantage be more clearly understood, with reference to the accompanying drawings and embodiments, the present invention is further retouched in detail
It states.It should be understood that specific embodiment described herein is only configured to explain the present invention, it is not configured as limiting the present invention.
To those skilled in the art, the present invention can be real in the case where not needing some details in these details
It applies.Below the description of embodiment is used for the purpose of better understanding the present invention to provide by showing example of the invention.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
Fig. 1 shows the first stream of the resource allocation methods of remote radio unit common community provided in an embodiment of the present invention
Journey schematic diagram.It may include:
S101: being total to the physical site in cell for RRU, detects whether that user terminal is in the physical site and includes
The edge of the signal cover of RRU.
S102: if having detected the resource allocation for the RRU that user terminal is in the edge, only includes by the physical site
To the user terminal for being in the edge.
Illustratively, it is illustrated by taking current high-speed rail private network planning as an example.
Current high-speed rail private network is planned to RRU and is distributed construction, and the linear chain structure of RRU along high-speed rail railway, multiple
RRU merges into a RRU and is total to cell, it is generally the case that 8-12 RRU merges into a RRU and be total to cell.
Merged assuming that a RRU is total to cell by 12 RRU, wherein 12 RRU be respectively RRU1, RRU2, RRU3,
RRU4, RRU5, RRU6, RRU7, RRU8, RRU9, RRU10, RRU11 and RRU12.Wherein, two RRU are a physical site.
It includes 6 physical sites that then a RRU is total to cell altogether, respectively physical site 1, physical site 2, physical site 3, physical site
4, physical site 5 and physical site 6, wherein physical site 1 includes RRU1 and RRU2, and physical site 2 includes RRU3 and RRU4,
Physical site 3 includes RRU5 and RRU6, and physical site 4 includes RRU7 and RRU8, and physical site 5 includes RRU9 and RRU10, physics
Website 6 includes RRU11 and RRU12.
By taking physical site 1 as an example, for physical site 1, detect whether that user terminal is in physical site 1 and includes
The edge of the signal cover of RRU1 and RRU2.
Assuming that the user terminal for detecting on train A is in the edge of the signal cover of RRU1 and RRU2, then only will
The resource allocation of RRU1 and RRU2 is to the user terminal on train A, not by the resource allocation of RRU3 to RRU12 on train A
User terminal.User terminal of the i.e. only RRU1 and RRU2 on train A sends control information and business information.
It is non-zero by the power adjustment of RRU1 and RRU2 specifically, can be zero by the power adjustment of RRU3 to RRU12,
Specifically, can be power maximum value by the power adjustment of RRU1 and RRU2.At this point, RRU3-RRU12 no signal exports, RRU1
There is signal output with RRU2.Guarantee the resource for only enabling RRU1 and RRU2.
Specifically, the embodiment of the present invention detects whether that user terminal is in the signal for the RRU that the physical site includes
The edge of coverage area may include:
The Doppler frequency shift between user terminal and the physical site is calculated in real time；
According to the Doppler frequency shift being calculated in real time, detect whether that user terminal is in the edge.
Specifically, the Doppler frequency shift that the foundation of the embodiment of the present invention is calculated in real time, has detected whether user terminal
In the edge, may include:
The size of the absolute value of the absolute value and target Doppler frequency displacement for the Doppler frequency shift being calculated more in real time,
In, target Doppler frequency displacement is the Doppler's frequency precalculated with movement speed identical with user terminal at the edge
It moves；
If the absolute value for the Doppler frequency shift being calculated in real time is greater than the absolute value of target Doppler frequency displacement, detect
User terminal is in except signal cover；
If the absolute value for the Doppler frequency shift being calculated in real time is equal to the absolute value of target Doppler frequency displacement, detect
User terminal is in edge；
If the absolute value for the Doppler frequency shift being calculated in real time is less than the absolute value of target Doppler frequency displacement, detect
User terminal is within signal cover.
Specifically, calculating Doppler frequency shift is the prior art, the embodiment of the present invention does not repeat it herein.Work as user
When terminal moving direction is identical with Electromagnetic Wave Propagation direction (user terminal is mobile towards physical site), Doppler frequency shift is positive
Value；When user terminal moving direction and contrary Electromagnetic Wave Propagation (user terminal is mobile far from physical site direction),
Doppler frequency shift is negative value.
Illustratively, it is assumed that the edge of the signal cover for the RRU that physical site includes and the angle of RRU antenna are
10°。
It is 2GHz (Gigahertz) with carrier frequency, the movement speed of 300Km/h (kilometer per hour) precalculates to obtain
Target Doppler frequency displacement absolute value be 547Hz (hertz).
When train is apart from physical site infinity, can regard the angle between train and RRU antenna as at this time is 0 °.When
When train is mobile to physical site with the speed of 300Km/h, Doppler frequency shift is 555Hz at this time.
When the absolute value for the Doppler frequency shift being calculated in real time is greater than 547Hz, and is less than or equal to 555Hz, train exists
Except signal cover.
When the absolute value for the Doppler frequency shift being calculated in real time is equal to 547Hz, train is in signal cover
Edge.
When the absolute value for the Doppler frequency shift being calculated in real time be less than 547Hz when, train be in signal cover it
It is interior.
The control information and business information for the user terminal on RRU independent bearing train for including due to physical site, when
There are two trains to go in the same direction and when two trains are not in same signal cover, it is double that RRU is total to cell capacity, in turn
Reduce business obstruction.
Fig. 2 shows second of streams of the resource allocation methods of remote radio unit common community provided in an embodiment of the present invention
Journey schematic diagram.On the basis of embodiment illustrated in fig. 2 embodiment shown in Fig. 1 of the present invention, increase S103 after S102: if place
User terminal in the edge is in except the signal cover for the RRU that the physical site includes, and discharges the money of the RRU
Source.
In practical applications, there are more trains while being in same signal cover.Usual this feelings
Condition is more common in railway station or is equipped with the section of a plurality of tracks.
Assuming that the signal that a certain moment train A, train B and train C are in RRU1 and RRU2 that physical site 1 includes covers
Within the scope of lid.
When train A, train B and train C are in except the signal cover of RRU1 and RRU2 (i.e. train A, train B
The signal cover of RRU1 and RRU2 are sailed out of with train C) when, discharge the resource of RRU1 and RRU2.If train A, train B
It is within the signal cover of RRU1 and RRU2 with any one train in tri- trains of train C, does not then discharge RRU1
With the resource of RRU2.
Specifically, the resource of the release of the embodiment of the present invention RRU, may include: by the power adjustment of the RRU is zero.
It illustratively, is zero by the power adjustment of RRU1 and RRU2.At this point, RRU1 and RRU2 no signal exports, realize
The release of the resource of RRU1 and RRU2.
It should be noted that above-mentioned be illustrated by taking current high-speed rail private network planning as an example, only of the invention one is specific
Example, and do not constitute a limitation of the invention.
The resource allocation methods of the remote radio unit common community of the embodiment of the present invention can be improved the appearance that RRU is total to cell
Amount, and then reduce business obstruction.
Corresponding with above-mentioned embodiment of the method, the embodiment of the present invention also provides a kind of money of remote radio unit common community
Source distributor.
As shown in figure 3, Fig. 3 shows the resource allocation device of remote radio unit common community provided in an embodiment of the present invention
The first structural schematic diagram.It may include: detection module 301 and distribution module 302, wherein
Detection module 301 has detected whether that user terminal is in the object for being total to the physical site in cell for RRU
The edge of the signal cover for the RRU that reason website includes；
Distribution module 302, for only will in the case where detection module 301 has detected that user terminal is in the edge
The resource allocation for the RRU that the physical site includes gives the user terminal in the edge.
Illustratively, it is illustrated by taking current high-speed rail private network planning as an example.
Current high-speed rail private network is planned to RRU and is distributed construction, and the linear chain structure of RRU along high-speed rail railway, multiple
RRU merges into a RRU and is total to cell, it is generally the case that 8-12 RRU merges into a RRU and be total to cell.
Merged assuming that a RRU is total to cell by 12 RRU, wherein 12 RRU be respectively RRU1, RRU2, RRU3,
RRU4, RRU5, RRU6, RRU7, RRU8, RRU9, RRU10, RRU11 and RRU12.Wherein, two RRU are a physical site.
It includes 6 physical sites that then a RRU is total to cell altogether, respectively physical site 1, physical site 2, physical site 3, physical site
4, physical site 5 and physical site 6, wherein physical site 1 includes RRU1 and RRU2, and physical site 2 includes RRU3 and RRU4,
Physical site 3 includes RRU5 and RRU6, and physical site 4 includes RRU7 and RRU8, and physical site 5 includes RRU9 and RRU10, physics
Website 6 includes RRU11 and RRU12.
By taking physical site 1 as an example, for physical site 1, detect whether that user terminal is in physical site 1 and includes
The edge of the signal cover of RRU1 and RRU2.
Assuming that the user terminal for detecting on train A is in the edge of the signal cover of RRU1 and RRU2, then only will
The resource allocation of RRU1 and RRU2 is to the user terminal on train A, not by the resource allocation of RRU3 to RRU12 on train A
User terminal.User terminal of the i.e. only RRU1 and RRU2 on train A sends control information and business information.
It is non-zero by the power adjustment of RRU1 and RRU2 specifically, can be zero by the power adjustment of RRU3 to RRU12,
Specifically, can be power maximum value by the power adjustment of RRU1 and RRU2.At this point, RRU3-RRU12 no signal exports, RRU1
There is signal output with RRU2.Guarantee the resource for only enabling RRU1 and RRU2.
Optionally, the detection module 301 of the embodiment of the present invention may include: computational submodule and detection sub-module (in figure
It is not shown), wherein
Computational submodule, for calculating the Doppler frequency shift between user terminal and physical site in real time；
Detection sub-module, for having detected whether that user terminal is in and being somebody's turn to do according to the Doppler frequency shift being calculated in real time
Edge.
Optionally, the detection sub-module of the embodiment of the present invention, specifically can be used for:
The size of the absolute value of the absolute value and target Doppler frequency displacement for the Doppler frequency shift being calculated more in real time,
In, target Doppler frequency displacement is the Doppler's frequency precalculated with movement speed identical with user terminal at the edge
It moves；
If the absolute value for the Doppler frequency shift being calculated in real time is greater than the absolute value of target Doppler frequency displacement, detect
User terminal is in except signal cover；
If the absolute value for the Doppler frequency shift being calculated in real time is equal to the absolute value of target Doppler frequency displacement, detect
User terminal is in edge；
If the absolute value for the Doppler frequency shift being calculated in real time is less than the absolute value of target Doppler frequency displacement, detect
User terminal is within signal cover.
Specifically, calculating Doppler frequency shift is the prior art, the embodiment of the present invention does not repeat it herein.Work as user
When terminal moving direction is identical with Electromagnetic Wave Propagation direction (user terminal is mobile towards physical site), Doppler frequency shift is positive
Value；When user terminal moving direction and contrary Electromagnetic Wave Propagation (user terminal is mobile far from physical site direction),
Doppler frequency shift is negative value.
Illustratively, it is assumed that the edge of the signal cover for the RRU that physical site includes and the angle of RRU antenna are
10°。
It is 2GHz (Gigahertz) with carrier frequency, the movement speed of 300Km/h (kilometer per hour) precalculates to obtain
Target Doppler frequency displacement absolute value be 547Hz (hertz).
When train is apart from physical site infinity, can regard the angle between train and RRU antenna as at this time is 0 °.When
When train is mobile to physical site with the speed of 300Km/h, Doppler frequency shift is 555Hz at this time.
When the absolute value for the Doppler frequency shift being calculated in real time is greater than 547Hz, and is less than or equal to 555Hz, train exists
Except signal cover.
When the absolute value for the Doppler frequency shift being calculated in real time is equal to 547Hz, train is in signal cover
Edge.
When the absolute value for the Doppler frequency shift being calculated in real time be less than 547Hz when, train be in signal cover it
It is interior.
The control information and business information for the user terminal on RRU independent bearing train for including due to physical site, when
There are two trains to go in the same direction and when two trains are not in same signal cover, it is double that RRU is total to cell capacity, in turn
Reduce business obstruction.
Fig. 4 shows second of knot of the resource allocation device of remote radio unit common community provided in an embodiment of the present invention
Structure schematic diagram.On the basis of embodiment illustrated in fig. 4 embodiment shown in Fig. 3 of the present invention, increases resource release module 303, be used for
In the case where the user terminal in the edge is in except the signal cover for the RRU that the physical site includes, release
Put the resource of the RRU.
In practical applications, there are more trains while being in same signal cover.Usual this feelings
Condition is more common in railway station or is equipped with the section of a plurality of tracks.
Assuming that the signal that a certain moment train A, train B and train C are in RRU1 and RRU2 that physical site 1 includes covers
Within the scope of lid.
When train A, train B and train C are in except the signal cover of RRU1 and RRU2 (i.e. train A, train B
The signal cover of RRU1 and RRU2 are sailed out of with train C) when, discharge the resource of RRU1 and RRU2.If train A, train B
It is within the signal cover of RRU1 and RRU2 with any one train in tri- trains of train C, does not then discharge RRU1
With the resource of RRU2.
Optionally, the resource release module 303 of the embodiment of the present invention, specifically can be used for:
The feelings except the signal cover for the RRU that the physical site includes are in the user terminal in the edge
It is zero by the power adjustment of the RRU under condition.
It illustratively, is zero by the power adjustment of RRU1 and RRU2.At this point, RRU1 and RRU2 no signal exports, realize
The release of the resource of RRU1 and RRU2.
It should be noted that above-mentioned be illustrated by taking current high-speed rail private network planning as an example, only of the invention one is specific
Example, and do not constitute a limitation of the invention.
The resource allocation device of the remote radio unit common community of the embodiment of the present invention can be improved the appearance that RRU is total to cell
Amount, and then reduce business obstruction.
It should be clear that the invention is not limited to specific configuration described above and shown in figure and processing.
For brevity, it is omitted here the detailed description to known method.In the above-described embodiments, several tools have been described and illustrated
The step of body, is as example.But method process of the invention is not limited to described and illustrated specific steps, this field
Technical staff can be variously modified, modification and addition after understanding spirit of the invention, or suitable between changing the step
Sequence.
Functional block shown in structures described above block diagram can be implemented as hardware, software, firmware or their group
It closes.When realizing in hardware, it may, for example, be electronic circuit, specific integrated circuit (ASIC), firmware appropriate, insert
Part, function card etc..When being realized with software mode, element of the invention is used to execute program or the generation of required task
Code section.Perhaps code segment can store in machine readable media program or the data-signal by carrying in carrier wave is passing
Defeated medium or communication links are sent." machine readable media " may include any medium for capableing of storage or transmission information.
The example of machine readable media includes electronic circuit, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), soft
Disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..Code segment can be via such as internet, inline
The computer network of net etc. is downloaded.
It should also be noted that, the exemplary embodiment referred in the present invention, is retouched based on a series of step or device
State certain methods or system.But the present invention is not limited to the sequence of above-mentioned steps, that is to say, that can be according in embodiment
The sequence referred to executes step, may also be distinct from that the sequence in embodiment or several steps are performed simultaneously.
The above description is merely a specific embodiment, it is apparent to those skilled in the art that,
For convenience of description and succinctly, the system, module of foregoing description and the specific work process of unit can refer to preceding method
Corresponding process in embodiment, details are not described herein.It should be understood that scope of protection of the present invention is not limited thereto, it is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or substitutions,
These modifications or substitutions should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of resource allocation methods of remote radio unit common community, which is characterized in that the described method includes:
It is total to the physical site in cell for radio frequency remote unit RRU, has detected whether that user terminal is in the physical site
The edge of the signal cover for the RRU for including；
If having detected that user terminal is in the edge, only the resource allocation of the RRU is given to the use in the edge
Family terminal；Wherein,
The edge for detecting whether user terminal and being in the signal cover for the RRU that the physical site includes, comprising:
The Doppler frequency shift between user terminal and the physical site is calculated in real time；
According to the Doppler frequency shift, detect whether that user terminal is in the edge；Wherein,
It is described according to the Doppler frequency shift, detected whether that user terminal is in the edge, comprising:
Compare the size of the absolute value of the Doppler frequency shift and the absolute value of target Doppler frequency displacement, wherein the target is more
General Le frequency displacement is the Doppler frequency shift precalculated with movement speed identical with the user terminal at the edge；
If the absolute value of the Doppler frequency shift is greater than the absolute value of the target Doppler frequency displacement, detect that the user is whole
End is except the signal cover；
If the absolute value of the Doppler frequency shift is equal to the absolute value of the target Doppler frequency displacement, detect that the user is whole
End is in the edge；
If the absolute value of the Doppler frequency shift is less than the absolute value of the target Doppler frequency displacement, detect that the user is whole
End is within the signal cover.
2. the method according to claim 1, wherein being in institute in described only give the resource allocation of the RRU
After the user terminal for stating edge, the method also includes:
If the user terminal in the edge is in except the signal cover, the money of the RRU is discharged
Source.
3. according to the method described in claim 2, it is characterized in that, the resource of the release RRU, comprising:
Power adjustment by the RRU is zero.
4. a kind of resource allocation device of remote radio unit common community, which is characterized in that described device include: detection module and
Distribution module, wherein
The detection module has detected whether user terminal for being total to the physical site in cell for radio frequency remote unit RRU
The edge of the signal cover for the RRU for including in the physical site；
The distribution module, for only will in the case where the detection module has detected that user terminal is in the edge
The resource allocation of the RRU gives the user terminal in the edge；Wherein,
The detection module, comprising: computational submodule and detection sub-module, wherein
The computational submodule, for calculating the Doppler frequency shift between user terminal and the physical site in real time；
The detection sub-module, for having detected whether that user terminal is in the edge according to the Doppler frequency shift；Its
In,
The detection sub-module, is specifically used for:
Compare the size of the absolute value of the Doppler frequency shift and the absolute value of target Doppler frequency displacement, wherein the target is more
General Le frequency displacement is the Doppler frequency shift precalculated with movement speed identical with the user terminal at the edge；
If the absolute value of the Doppler frequency shift is greater than the absolute value of the target Doppler frequency displacement, detect that the user is whole
End is except the signal cover；
If the absolute value of the Doppler frequency shift is equal to the absolute value of the target Doppler frequency displacement, detect that the user is whole
End is in the edge；
If the absolute value of the Doppler frequency shift is less than the absolute value of the target Doppler frequency displacement, detect that the user is whole
End is within the signal cover.
5. device according to claim 4, which is characterized in that described device further include: resource release module, in institute
It states in the case that the user terminal in the edge is in except the signal cover, discharges the resource of the RRU.
6. device according to claim 5, which is characterized in that the resource release module is specifically used for:
In the case where the user terminal in the edge is in except the signal cover, by the RRU
Power adjustment be zero.
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| CN103688585A (en) * | 2013-06-07 | 2014-03-26 | 华为技术有限公司 | Signal transmission method and device for multi-RRU co-cell |
| CN105208568A (en) * | 2015-10-26 | 2015-12-30 | 中国铁路总公司 | Frequency planning method applied to LTE-R system based on distributed base station |
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