CN104244340B - A kind of transmission method of CRE biases and base station - Google Patents
A kind of transmission method of CRE biases and base station Download PDFInfo
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- CN104244340B CN104244340B CN201310242977.XA CN201310242977A CN104244340B CN 104244340 B CN104244340 B CN 104244340B CN 201310242977 A CN201310242977 A CN 201310242977A CN 104244340 B CN104244340 B CN 104244340B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The embodiment of the invention discloses a kind of transmission method and device of CRE biases, this method includes：First base station determines CRE bias of the first community to second community；The first community is the cell under the first base station, and the second community is the cell under the second base station, and the first community and the second community are adjacent cell；The first community is sent to second base station to the CRE biases of the second community by first base station, and the first community determines CRE bias of the second community to adjacent cell to the CRE biases of the second community for second base station.The embodiment of the present invention can reduce the generation of pingpong phenomenons when UE passes through cell extension region.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of transmission method of CRE biases and base station.
Background technology
In heterogeneous network（HetNet, Heterogeneous Network）In, with macrocell（macro cell）With it is pico-
Cellular cell（pico cell）Exemplified by the scene of shared frequency spectrum, due to pico cell and macro cell transmission power difference
It is larger, typically it is respectively 30 decibels of millis（dBm）Watt and 46dBm watts, therefore, the user equipment in pico cell（UE, User
Equipment）On Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) is received
By the severe jamming from macro cell the Physical Downlink Control Channel performance in pico cell can be caused low during data
Under.
When pico cell introduce cell range extension（CRE,Cell Range Expansion）During technology, pico cell
In PDCCH performance will more deteriorate.For example, in cell range expansion technique, leaned on when UE moves to from Macro cell
During nearly Pico cell, in order to effectively mitigate impact of the data traffic to macrocell, macro base station belonging to Macro cell can be with
UE is allowed to be linked into earlier in the micro-base station belonging to Pico cell by deviant in setting control switching.This CRE technologies
Equivalent to the coverage for expanding Pico cell, this subregion of expansion is referred to as Pico cell cell extension area
Domain, this deviant are properly termed as CRE bias of the micro-base station to the macro base station.
In the prior art, UE during cell extension region by easily producing table tennis（pingpong）The phenomenon of switching, from
And UE communication quality is influenceed, waste networked communication resource.
The content of the invention
Transmission method and the base station of a kind of CRE biases are provided in the embodiment of the present invention, UE can be reduced and pass through cell
The generation of pingpong phenomenons during extended area, UE communication quality is improved, reduces the waste of networked communication resource.
First aspect of the embodiment of the present invention provides a kind of transmission method of CRE biases, including：First base station determines first
CRE bias of the cell to second community；The first community is the cell under the first base station, and the second community is the
Cell under two base stations, the first community and second community cell adjacent each other；First base station is small by described first
Area is sent to second base station, CRE of the first community to the second community to the CRE biases of the second community
Bias determines CRE bias of the second community to adjacent cell for second base station.
Based in a first aspect, in the first possible implementation of first aspect, methods described also includes：Described first
Identification information is sent to second base station by base station, and the identification information is used to determine the first community.
Second aspect of the embodiment of the present invention, there is provided a kind of transmission method of CRE biases, including：Second base station receives the
CRE bias of the first community that one base station is sent to second community；The first community is the cell under the first base station,
The second community is the cell under second base station, and the first community and the second community are neighbor cell；It is described
Second base station determines the second community to adjacent cell the CRE biases of the second community according to the first community
CRE biases.
Based on second aspect, in the first possible implementation of second aspect, methods described also includes：Described second
Base station receives identification information, and the identification information is used to determine the adjacent cell.
The third aspect of the embodiment of the present invention, there is provided a kind of first base station, including：Determining unit, for determining that first is small
CRE bias of the area to second community；The first community is the cell under the first base station, and the second community is second
Cell under base station, the first community and the second community are neighbor cell；Transmitting element, for by the first community
Second base station is sent to the CRE deviants of the second community, the first community is inclined to the CRE of the second community
Put value and determine CRE bias of the second community to adjacent cell for second base station.
Based on the third aspect, in the first possible implementation of the third aspect, the transmitting element is additionally operable to mark
Know information and be sent to second base station, the identification information is used to determine the first community.
The fourth aspect of the embodiment of the present invention, there is provided a kind of second base station, including:Receiving unit, for receiving the first base
The first community sent stand to the CRE biases of second community；The first community is the cell under the first base station, described
Second community is the cell under second base station, and the first community and the second community are adjacent cell；It is it is determined that single
Member, for determining CRE of the second community to adjacent cell to the CRE biases of the second community according to the first community
Bias.
Based on fourth aspect, in the first possible implementation of fourth aspect, the receiving unit is additionally operable to receive
Identification information, the identification information are used to determine the adjacent cell.
Using technical scheme provided in an embodiment of the present invention, base station may be referred to what adjacent cell was set to cell under the base station
CRE biases set under the base station cell to the CRE biases of adjacent cell, the cell extension area of UE cells under by the base station
It can reduce during domain because of the CRE biases that cell under other base stations is set and caused pingpong phenomenons.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Figure 1A is macrocell and the CRE schematic diagrames of Microcell；
CRE schematic diagrames of the Figure 1B between micro-base station and adjacent macro base station；
Fig. 2 is a kind of schematic flow sheet of the transmission method of CRE biases；
Fig. 3 is macrocell to the schematic diagram after the CRE biases adjustment of Microcell；
Fig. 4 is Microcell to the schematic diagram after the CRE biases adjustment of macrocell；
Fig. 5 is a kind of structural representation of first base station；
Fig. 6 is a kind of structural representation of first base station；
Fig. 7 is a kind of schematic flow sheet of the transmission method of CRE biases；
Fig. 8 is a kind of structural representation of second base station；
Fig. 9 is a kind of structural representation of second base station.
Embodiment
In order that UE being switched in Target cell as early as possible in moving process, introduce cell range expansion technique.
For example, macrocell and the CRE schematic diagrames of Microcell as shown in Figure 1A, UE carries out business transmission in macrocell, as UE is moved
Dynamic, UE moves closer to Microcell, and in order to mitigate load and the service traffics in macrocell, macro base station receives the micro- of micro-base station transmission
Cell determines whether UE being switched in Microcell as early as possible to the CRE biases of macrocell according to the CRE biases.
UE may be switched to Microcell by macro base station according to Microcell to the CRE biases of macrocell, because macrocell is to Microcell
CRE biases set it is unreasonable, be switched to Microcell in UE, micro-base station but judges that the UE fall into macrocell
Cell extension region in, cause micro-base station that UE is switched back into macro base station again, then macro base station may again according to Microcell to grand
UE is switched to Microcell by the CRE biases of cell, is toggled repeatedly successively and is produced pingpong phenomenons, causes UE can not
It is normally carried out communication service.
For another example referring to the CRE schematic diagrames between the micro-base station shown in Figure 1B and adjacent macro base station.Assuming that Microcell is to grand
CRE that cell A CRE biases are determined as illustrated, and Microcell to CRE is not present between macrocell B, then UE is according to figure
When UE paths in 1B are moved, UE handoff procedure is：Microcell is switched to from macrocell A, macrocell is switched to from micro-base station
B, Microcell is switched to from macrocell B, and macrocell B is switched to from Microcell, so as to generate pingpong phenomenons.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Whole description, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The first base station of the embodiment of the present invention and the second base station can be respectively：The base station of evolution（eNB）, base station（Node
B）, base station（BS）, base station sending station（BTS）, access point（AP）Deng；The UE can be access terminal（access
terminal）, access point（access point）, personal digital assistant（PDA）, portable computer（laptop）Deng.First base
Standing can be macro base station or be micro-base station, and the second base station can be macro base station or be micro-base station.
Wherein, in following embodiment of the present invention, alleged CRE biases can be the absolute value of CRE biases, here
It is not intended to limit.
The embodiment of the present invention, a kind of transmission method of CRE biases is on the one hand provided, such as the biography that Fig. 2 is the CRE biases
The schematic flow sheet of transmission method, this method include herein below.
Step 201, first base station determines CRE bias of the first community to second community；The first community is described
Cell under first base station, the second community are the cell under the second base station, and the first community is with the second community
Adjacent cell.
Step 202, the first community is sent to described by the first base station to the CRE biases of the second community
Second base station, the first community determine that described second is small to the CRE biases of the second community for second base station
CRE bias of the area to the adjacent cell of second community.
Alternatively, first community can be carried and asked in mobility change by first base station to the CRE biases of second community
Ask and the second base station is sent in message.New field can be increased on the basis of existing mobility changes request message to realize,
Such as shown in table 1, add eNB（Pico）Moving parameter（Mobility Parameters）This field.First community is to
The CRE biases of two cells can be carried by the field.
Table 1
In step 201, the first community that first base station determines can be by network to the CRE biases of second community
Management system issues or first base station is inclined to the CRE of first community according to the adjacent cell of the first community received
Put what value was configured.The adjacent cell of first community, can be that second community can also be in addition to second community, first small
Other adjacent cells in area.
In step 202, the adjacent cell of second community can be first community or in addition to first community,
Other adjacent cells of two cells.
In embodiments of the present invention, the second base station the CRE biases of second community will be determined according to first community the
Two cells issue first base station to the CRE biases of first community so that first base station is according to second community to first community
CRE biases are adjusted to first community to the CRE biases of second community, and first base station is by first community to second community
CRE biases adjustment result issue the second base station so that the second base station further optimizes CRE of the second community to first community
Bias, reduced as far as possible so as to reach because CRE biases set unreasonable caused pingpong phenomenons.
As a kind of optional implementation, the second base station determines according to first community to the CRE biases of second community
When two cells are to the CRE biases of the adjacent cell of second community, it can include：
Second base station determines CRE of the second community to first community according to first community to the CRE biases of second community
Second community is set to and second community pair by bias, the second base station to the CRE biases of other adjacent cells of second community again
The CRE biases of first community are identical.It is inclined to the CRE of second community according to first community in the second base station as an example
Putting value determines second community to during the CRE biases of first community, causing first community to second community as much as possible
Cell extension region and second community it is minimum to the cell extension region lap of first community.As shown in Figure 3 is grand small
Area is to the schematic diagram after the CRE biases adjustment of Microcell.Macrocell is compared with the cell extension region lap of Microcell
Figure 1A is smaller, UE after Microcell is switched to, due to macrocell the CRE of Microcell is reduced UE be not easy to be switched to again it is grand small
Qu Zhong, it is possible thereby to reduce pingpong phenomenons of the UE in macrocell and Microcell.Therefore, because after network design, it is grand small
The coverage of area and Microcell is just decided under ideal conditions, if macrocell becomes big to the CRE biases of Microcell,
Then Microcell needs to diminish to the CRE of macrocell biasing, is only possible to ensure that the scope in cell extension region diminishes or constant, so that
Obtaining pingpong phenomenons will not increase.Further, after Microcell as shown in Figure 4 is to the CRE biases adjustment of macrocell
Schematic diagram.By the identical to macrocell A CRE biases with Microcell of CRE bias setting of the Microcell to macrocell B, make
UE is obtained when by the cell extension region of Microcell, handoff procedure is to switch to Microcell from macrocell A, is switched from Microcell
To macrocell B, compared with Figure 1B, the generation of pingpong phenomenons will be greatly reduced.
Alternatively, the above method also includes：Step 203, identification information is sent to second base by the first base station
Stand, the identification information is used to determine the first community.
Alternatively, the identification information can include the public land mobile network belonging to the first community
（PublicLandMobileNetwork, PLMN）.In the case of shared frequency spectrum, that is, first community or second community can
Multiple PLMN can be belonged to.A usual operator at least corresponds to a PLMN.For example, first community had not only belonged to A operators but also belonged to
In B operators.Second base station can specifically judge that second community is carried out to first community CRE biases according to identification information
It is the first community for second community and which PLMN for being directed to which PLMN during setting.For example, it may be under A operators
Two cells are to the second community under the CRE biases of the first community under A operators or A operators under B operators
First community CRE biases or B operators under second community it is inclined to the CRE of the first community under A operators
Shifting value.Field corresponding to carrying first network mark can further be increased on the basis of table 1：Serving PLMN, so as to
Obtain the mobility change appealing structure shown in table 2.
Table 2
The embodiment of the present invention is on the one hand, there is provided a kind of first base station 500, the first base station can be performed as corresponding to Fig. 2
Embodiment of the method in action performed by first base station, such as the structural representation that Fig. 5 is the first base station, the first base station bag
Include：
Determining unit 510, for determining CRE bias of the first community to second community；The first community is described
Cell under first base station, the second community are the cell under the second base station, and the first community is with the second community
Adjacent cell；
Transmitting element 520, for the first community to be sent into described second to the CRE deviants of the second community
Base station, the first community determine the second community pair to the CRE biases of the second community for second base station
The CRE biases of adjacent cell.
Alternatively, transmitting element is additionally operable to identification information being sent to second base station, and the identification information is used for true
The fixed first community.
The first community that determining unit 510 determines can be by under NMS to the CRE biases of second community
Send out or first base station is set according to the adjacent cell of the first community received to the CRE biases of first community
Put.
The embodiment of the present invention on the one hand, there is provided a kind of first base station 600, the first base station can as corresponding to Fig. 2 method
Action in embodiment performed by first base station, such as the structural representation that Fig. 6 is the first base station, the first base station includes：Place
Manage device 610, memory 620, transceiver 630 and bus 640；Processor 610, memory 620, transceiver 630 pass through bus 640
It is connected with each other.Memory 620 may include high-speed RAM memory, it is also possible to also including nonvolatile memory（non-
volatile memory）, a for example, at least magnetic disk storage.The bus 640 can be divided into address bus, data/address bus
Or controlling bus etc..For ease of representing, only represented in Fig. 6 with a thick line, it is not intended that an only bus or a species
The bus of type.
Memory 620, for depositing program code.Processor 610 is used to perform the program code.The program code is used for
Realize that following action includes：
Determine CRE bias of the first community to second community；The first community is the cell under the first base station,
The second community is the cell under the second base station, and the first community and the second community are adjacent cell；By described in
First community is sent to second base station to the CRE biases of the second community, and the first community is small to described second
The CRE biases in area determine CRE bias of the second community to adjacent cell for second base station.
Alternatively, the program code, which is additionally operable to realization, includes：Identification information is sent to second base station, mark letter
Cease for determining first community.
Using technical scheme provided in an embodiment of the present invention, base station may be referred to what adjacent cell was set to cell under the base station
CRE biases set under the base station cell to the CRE biases of adjacent cell, the cell extension area of UE cells under by the base station
It can reduce during domain because of the CRE biases that cell under other base stations is set and caused pingpong phenomenons.
The embodiment of the present invention is on the other hand, there is provided a kind of transmission method of cell range extension CRE biases, such as Fig. 7 institutes
A kind of schematic flow sheet of the transmission method of the CRE biases shown, this method include herein below.
Step 701, the second base station receives first community that first base station sends to the CRE biases of second community, and this
One cell is the cell under first base station, and second community is the cell under the second base station, and first community and second community are adjacent
Cell.
Step 702, the second base station determines the second community to neighbour the CRE biases of second community according to first community
The CRE biases of cell.
In a step 702, adjacent cell can be first community or go out outside first community, second community
Other adjacent cells.Second base station determines CRE of the second community to adjacent cell according to first community to the CRE biases of second community
The process of bias, it was described in detail in preceding method embodiment, repeated no more here, and can refer to the side as corresponding to Fig. 2
Method embodiment.
Alternatively, the above method can also include step 703, and the second base station receives identification information, and the identification information is used for
Determine adjacent cell.The identification information can be the PLMN belonging to the adjacent cell of second community.In the case where network spectrum is shared,
One adjacent cell of second community or second community, may belong to multiple PLMN.Under normal circumstances, an operator is corresponding extremely
A few PLMN.Second base station can go out second community is under which PLMN or which operator according to identification information judgment
The setting that the CRE biases of adjacent cell are carried out.The adjacent cell that second community might as well be assumed is first community, then the second base station can root
Go out the setting for the CRE biases that second community is carried out to the first community under PLMN1, or second community according to identification information judgment
The setting carried out to the first community under PLMN2.
The embodiment of the present invention provided one kind the second base station 800, the structural representation of the second base station 800 as shown in Figure 8,
Second base station 800 can perform the action performed by the second base station, second base station in embodiment of the method as corresponding to Fig. 7
800 include：Receiving unit 810, for receiving CRE bias of the first community to second community of first base station transmission；It is described
First community is the cell under the first base station, and the second community is the cell under second base station, and described first is small
Area and the second community are adjacent cell；Determining unit 820, for according to the first community to the second community
CRE biases determine CRE bias of the second community to adjacent cell.
Alternatively, the receiving unit is additionally operable to receive the identification information that the first base station is sent, the identification information
For determining the adjacent cell.
The embodiment of the present invention also provides one kind the second base station 900, the structural representation of the second base station 900 as shown in Figure 9,
Second base station 900 can perform the action performed by the second base station, second base station in embodiment of the method as corresponding to Fig. 7
900 include：Processor 910, memory 920, transceiver 930 and bus 940；Processor 910, memory 920, transceiver 930
It is connected with each other by bus 940.Memory 920 may include high-speed RAM memory, it is also possible to also including nonvolatile memory
（non-volatile memory）, a for example, at least magnetic disk storage.The bus 940 can be divided into address bus, data
Bus or controlling bus etc..For ease of representing, only represented in Fig. 9 with a thick line, it is not intended that an only bus or one
The bus of type.
Memory 920 is used to store computer program code, and processor 910 is used to perform the computer program code.
The computer program code is used to realize that following action includes：The first community of first base station transmission is received to second
The CRE biases of cell；The first community is the cell under the first base station, and the second community is second base station
Under cell, the first community and the second community are adjacent cell；It is small to described second according to the first community
The CRE biases in area determine CRE bias of the second community to adjacent cell.
Alternatively, above computer program code is additionally operable to realize：Identification information is received, the identification information is used to determine
The adjacent cell.
Using technical scheme provided in an embodiment of the present invention, base station may be referred to what adjacent cell was set to cell under the base station
CRE biases set under the base station cell to the CRE biases of adjacent cell, the cell extension area of UE cells under by the base station
It can reduce during domain because of the CRE biases that cell under other base stations is set and caused pingpong phenomenons.
It is required that those skilled in the art can be understood that the technology in the embodiment of the present invention can add by software
The mode of general hardware platform realize.Based on such understanding, the technical scheme in the embodiment of the present invention substantially or
Say that the part to be contributed to prior art can be embodied in the form of software product, the computer software product can be deposited
Storage is in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are causing a computer equipment（Can be with
It is personal computer, server, or network equipment etc.）Perform some part institutes of each embodiment of the present invention or embodiment
The method stated.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiments.It is real especially for system
For applying example, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is referring to embodiment of the method
Part explanation.
The embodiments of the present invention described above are not intended to limit the scope of the present invention.It is any in the present invention
Spirit and principle within the modifications, equivalent substitutions and improvements made etc., should be included in the scope of the protection.
Claims (8)
- A kind of 1. transmission method of cell range extension CRE biases, it is characterised in that including：First base station determines CRE bias of the first community to second community；The first community is under the first base station Cell, the second community are the cell under the second base station, and the first community and the second community are adjacent cell；The first community is sent to second base station, institute by the first base station to the CRE biases of the second community State first community determines the second community to adjacent cell the CRE biases of the second community for second base station CRE biases.
- 2. according to the method for claim 1, it is characterised in that also include：Identification information is sent to second base station by the first base station, and the identification information is used to determine that described first is small Area.
- A kind of 3. transmission method of cell range extension CRE biases, it is characterised in that including:Second base station receives CRE bias of the first community to second community of first base station transmission；The first community is institute State the cell under first base station, the second community is the cell under second base station, the first community and described second Cell is adjacent cell；Second base station determines the second community to neighbour the CRE biases of the second community according to the first community The CRE biases of cell.
- 4. according to the method for claim 3, it is characterised in that also include：Second base station receives identification information, and the identification information is used to determine the adjacent cell.
- A kind of 5. first base station, it is characterised in that including：Determining unit, for determining CRE bias of the first community to second community；The first community is the first base station Under cell, the second community is the cell under the second base station, and the first community and the second community are adjacent small Area；Transmitting element, for the first community to be sent into second base station, institute to the CRE deviants of the second community State first community determines the second community to adjacent cell the CRE biases of the second community for second base station CRE biases.
- 6. first base station according to claim 5, it is characterised in thatThe transmitting element is additionally operable to identification information being sent to second base station, and the identification information is used to determining described the One cell.
- A kind of 7. second base station, it is characterised in that including：Receiving unit, for receiving CRE bias of the first community to second community of first base station transmission；The first community For the cell under the first base station, the second community is the cell under second base station, the first community with it is described Second community is adjacent cell；Determining unit, for determining the second community pair to the CRE biases of the second community according to the first community The CRE biases of adjacent cell.
- 8. the second base station according to claim 7, it is characterised in thatThe receiving unit is additionally operable to receive the identification information that the first base station is sent, and the identification information is used for described in determination Adjacent cell.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310242977.XA CN104244340B (en) | 2013-06-18 | 2013-06-18 | A kind of transmission method of CRE biases and base station |
| PCT/CN2014/077996 WO2014201932A1 (en) | 2013-06-18 | 2014-05-21 | Method for transmitting cre offset value and base station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310242977.XA CN104244340B (en) | 2013-06-18 | 2013-06-18 | A kind of transmission method of CRE biases and base station |
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| CN104244340B true CN104244340B (en) | 2018-03-06 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102300284A (en) * | 2011-09-21 | 2011-12-28 | 华为技术有限公司 | Network access method for micro base station and micro base station |
| CN102958124A (en) * | 2011-08-31 | 2013-03-06 | 上海贝尔股份有限公司 | Method and device for switching user equipment into second cell from first cell |
| CN103139890A (en) * | 2011-12-01 | 2013-06-05 | 株式会社Ntt都科摩 | Method of adjusting community coverage area in communication system, base station and low-power node |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8515427B2 (en) * | 2010-06-28 | 2013-08-20 | Qualcomm Incorporated | Resource utilization measurements for heterogeneous networks |
| CN103096334B (en) * | 2011-11-08 | 2016-09-21 | 华为技术有限公司 | Determine the method and device on cell extension biasing border |
-
2013
- 2013-06-18 CN CN201310242977.XA patent/CN104244340B/en active Active
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- 2014-05-21 WO PCT/CN2014/077996 patent/WO2014201932A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102958124A (en) * | 2011-08-31 | 2013-03-06 | 上海贝尔股份有限公司 | Method and device for switching user equipment into second cell from first cell |
| CN102300284A (en) * | 2011-09-21 | 2011-12-28 | 华为技术有限公司 | Network access method for micro base station and micro base station |
| CN103139890A (en) * | 2011-12-01 | 2013-06-05 | 株式会社Ntt都科摩 | Method of adjusting community coverage area in communication system, base station and low-power node |
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| WO2014201932A1 (en) | 2014-12-24 |
| CN104244340A (en) | 2014-12-24 |
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