CN104780546B - A kind of method of dynamic interference coordination - Google Patents
A kind of method of dynamic interference coordination Download PDFInfo
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- CN104780546B CN104780546B CN201410017291.5A CN201410017291A CN104780546B CN 104780546 B CN104780546 B CN 104780546B CN 201410017291 A CN201410017291 A CN 201410017291A CN 104780546 B CN104780546 B CN 104780546B
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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
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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- Computer Networks & Wireless Communication (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
A kind of method of dynamic interference coordination, the described method includes：Adjacent cell is divided into one group, as edge band, the edge band of neighbor cell is mutually orthogonal for 1/2 frequency band of each cell dividing system frequency band；It is grouped according to cell and determines that the first user is edge customer, second user is to be first with group edge customer；Uplink high interference sensitivity information HII and downlink are sent to the affiliated first base station of the first user by the second base station belonging to second user by X2 mouthfuls with respect to narrowband transmit power RNTP；The HII and RNTP that first base station is received the second base station and sent by X2 mouthfuls, the first user is in the edge band transmitting data of first base station.After the embodiment of the present invention, interference had not only been avoided that, but also ensure the capacity of system stabilization and higher resource utilization.
Description
Technical field
This application involves field of communication technology, more particularly, to a kind of method of dynamic interference coordination.
Background technology
LTE technologies can be applied to the various scenes including high ferro scene.Based on LTE technologies as wireless backhaul technology
High ferro covering system, with supporting vehicle high-speed multimedia transmission, the multiple business such as 2G/3G and WiFi access in compartment.
In view of the railway system can be obtained the limitation of frequency spectrum resource, high ferro covering preferably uses identical networking.In same frequency group
Under net scene, when two neighbor cells there are split train and it is closer to the distance when can there are serious co-channel interference, Huo Zhe little
There is train to rest in cell boarder in area, stronger interference is also had between the train opened with adjacent area.At this moment need to apply
Interference coordination technique effectively is evaded interference, ensures the telecommunication service quality of user in train.
LTE system is defined for base station（eNodeB）Between interaction uplink and downlink interference information, uplink high interference susceptibility
Information（HII）With downlink with respect to narrowband transmit power（RNTP）, transmitted in load information message.HII instructions are every
A Physical Resource Block（PRB）Interference sensitivity level, wherein high interference susceptibility frequency band keeps for this Cell Edge User, together
When adjacent cell edge customer also avoid the frequency band as far as possible.Whether transmission power to be used is more than to be somebody's turn to do by each PRB of RNTP instructions
Thresholding, wherein edge customer will not be kept for the frequency band that power limits, and adjacent area edge customer also avoids the frequency as far as possible
Band realizes interference coordination with this, evades interference.
Adjacent area can not be judged in traditional LTE system cell with the presence or absence of interference source, and only by judging this community user
Whether into edge, it is limited if into edge and uses edge band.This method is inapplicable, meeting for high-speed railways
Cause the significant wastage of system resource.Because for high-speed railways, only when adjacent area have train open or train rest on it is small
Just there are interference source during area edge, otherwise interference source is not present.This Cell Edge User is also limited in when adjacent area does not interfere with source
Edge band causes the waste of system resource.
The content of the invention
The embodiment of the present invention proposes a kind of method of dynamic interference coordination, has not only been avoided that interference, but also ensures what system was stablized
Capacity and higher resource utilization.
The technical solution of the embodiment of the present invention is as follows：
A kind of method of dynamic interference coordination, the described method includes：
Adjacent cell is divided into one group, 1/2 frequency band of each cell dividing system frequency band is adjacent as edge band
The edge band of cell is mutually orthogonal；
It is grouped according to cell and determines that the first user is edge customer, second user is to be first with group edge customer；
The second base station belonging to second user by X2 mouthfuls by uplink high interference sensitivity information HII and downlink with respect to narrowband
Transmit power RNTP is sent to the affiliated first base station of the first user；
The HII and RNTP that first base station is received the second base station and sent by X2 mouthfuls, the first user is on the side of first base station
Edge frequency band transmitting data.
Described be grouped according to cell determines that the first user is edge customer, and second user is to include with group edge customer:
The difference of first reporting of user serving cell A Reference Signal Received Power RSRP and adjacent cell B RSRP is less than pre- gating
Limit, then the first user is edge customer；Otherwise, the first user-center user；
Second user reports the difference of serving cell B RSRP and adjacent cell A RSRP to be less than pre-determined threshold, then second user is
Edge customer；Otherwise, user centered on second user.
The HII and RNTP include：It is other when filling in HII by the corresponding PRB of the edge band of cell B labeled as 1
PRB is labeled as 0；When filling in RNTP by the corresponding PRB of the edge band of cell B labeled as 1, other PRB are labeled as 0.
The HII and RNTP that the first base station is sent by the second base station of X2 mouthfuls of receptions, the first user is in first base station
Edge band transmitting data include：
If the corresponding PRB of the edge band of cell B is labeled as 1 in HII, the first user uses the uplink side of first base station
Edge frequency band transmission data；If the corresponding PRB of the edge band of cell B is labeled as 1 in RNTP, the first user uses first base station
Downlink edge band transmission data.
The method is further included：Non-flanged user in second base station；The HII and RNTP will when including filling in HII
The corresponding PRB of edge band of cell B is labeled as 0, and other PRB are labeled as 0；By the edge band of cell B when filling in RNTP
Corresponding PRB is labeled as 0, and other PRB are labeled as 0.
The method is further included：
If in HII information, for the corresponding PRB of edge band of cell B labeled as 0, the first user is complete using first base station
Frequency band transmission upstream data；If in RNTP information, labeled as 0, the first user uses the by the corresponding PRB of edge band of cell B
The Whole frequency band transmission downlink data of one base station.
The method is further included：First user-center user, the first user are passed using the Whole frequency band of first base station
Defeated uplink/downlink data.
As can be seen that adjacent cell is divided into one group in embodiments of the present invention from above-mentioned technical proposal, each
For 1/2 frequency band of cell dividing system frequency band as edge band, the edge band of neighbor cell is mutually orthogonal；It is grouped according to cell
The first user is determined as edge customer, second user is to be first with group edge customer；The second base station belonging to second user passes through
HII and RNTP are sent to the affiliated first base station of the first user by X2 mouthfuls；First base station receives the second base station by X2 mouthfuls and sends
HII and RNTP, the first user is in the edge band transmitting data of first base station.Since the edge band of neighbor cell is mutual
It is orthogonal, when two users are respectively the edge customer with group, determine the first user on the side of first base station according to HII and RNTP
Edge frequency band transmitting data.It had so both been avoided that interference, and when not with group edge customer, and can ensure the appearance that system is stablized
Amount and higher resource utilization.
Description of the drawings
Fig. 1 is the method flow schematic diagram of dynamic interference coordination；
Fig. 2 is resource allocation schematic diagram.
Specific embodiment
It must be more clearly understood to express the object, technical solutions and advantages of the present invention, below in conjunction with the accompanying drawings and specifically
The present invention is further described in more detail for embodiment.
In embodiments of the present invention, for this special application scenarios of high ferro, two neighbor cells are divided into one group,
It ensure that the higher utilization rate of system resource so that there are during edge customer, power system capacity will not decline for neighbor cell.
The X2 mouth HII and RNTP defined simultaneously using LTE not only transmit the edge band information of pre-planning, but also implicit
Ground transfers the information with the presence or absence of interference source in due course, and the band resource of edge customer is determined with this, both effectively avoids adjacent area
Interference between train but also entire frequency band can be used in edge customer during noiseless source, greatly improves power system capacity and money
Source utilization rate.
Below with there are two base stations, cell A is made of first base station and the first user, cell B is by the second base station and
Two base stations are formed.With reference to the specific embodiment technical solution that the present invention will be described in detail.
Embodiment one
Cell A divides into synchronous with cell B, and at same group, the service that cell A is the first user is small for the first user and second user
Area, cell B are first user's adjacent cell；Cell A is the adjacent cell of second user, and cell B is the serving cell of second user.The
One user is edge customer, and second user is to be first with group edge customer.
It is the method flow schematic diagram of dynamic interference coordination referring to attached drawing 1, specifically includes following steps：
101st, adjacent cell is divided into one group, 1/2 frequency band of each cell dividing system frequency band as edge band,
The edge band of neighbor cell is mutually orthogonal.
It is distributed for the cell of banding under high ferro scene, referring to attached drawing 2, divides two neighbor cells into one group, Mei Ge little
For 1/2 frequency band of Division band system band as edge band, the edge band of two cells is mutually orthogonal.It thus can be to avoid
With the interference being in group between the first user of edge band and second user.
102nd, it is grouped according to cell and determines that the first user is edge customer, second user is to be first with group edge customer.
Serving cell judges that train is edge customer if train enters cell edge, otherwise whether into cell edge
Centered on user.Specific determination methods are the serving cell Reference Signal Received Power according to reporting of user（RSRP）And adjacent cell
RSRP.Judge whether the difference of serving cell and the RSRP of adjacent cell are less than pre-determined threshold, if then user is edge customer, and
Corresponding adjacent cell is labeled as to the interfered cell of user；Otherwise user centered on.
Specifically, the difference of the first reporting of user serving cell A RSRP and adjacent cell B RSRP is less than pre-determined threshold, then and the
One user is edge customer；The difference of second user reporting subdistrict B RSRP and cell A RSRP is less than pre-determined threshold, then second uses
Family is edge customer.
Since the edge band of cell A and cell B are mutually orthogonal, the first user and the place of the edge band in cell A
It does not interfere with each other then, can work normally in the second user of the edge band of cell B.
103rd, HII and RNTP are sent to the first base belonging to the first user by the second base station belonging to second user by X2 mouthfuls
It stands；The HII and RNTP that first base station is received the second base station and sent by X2 mouthfuls, the first user is in the edge band of first base station
Transmitting data.
When the first user enters cell A edges and is determined as edge customer, due to second user to be first with group edge
User, then cell A to cell B trigger X2 mouthful load information message, carrying uplink HII and downlink RNTP.HII's fills out
Write method be by the corresponding PRB position marks of the edge band of cell B be 1（HII frequency bands）, other PRB are labeled as 0（Non- HII frequencies
Band）；The filling method of RNTP be by the corresponding PRB position marks of the edge band of cell B be 1（The unrestricted frequency band of power）,
His PRB is labeled as 0（Power limited frequency band）.
First base station determines that the first user transmits number on the edge band of first base station by the HII and RNTP of acquisition
According to.According to the corresponding PRB of edge band of cell B labeled as 1 i.e. in HII, the first user uses the uplink side of first base station
Edge frequency band transmission data；According to the corresponding PRB of edge band of cell B labeled as 1 in RNTP, the first user uses the first base
The downlink edge band transmission data stood.
Embodiment two
In second base station during non-flanged user, i.e., second user is switched to for the central user in cell B or second user
Other cells.
The load information that serving cell A where first user triggers X2 mouthfuls to second user affiliated subdistrict B disappear
Breath carries uplink HII and downlink RNTP.The filling method of HII information is that whole available bands of cell B are PRB corresponding
Tagging is 0（Non- HII frequency bands）；The filling method of RNTP information is by the corresponding PRB positions mark of whole available bands of cell B
It is denoted as 0（Power limited frequency band）.
In this way, the first user can use whole frequency band transmission uplink/downlink data of affiliated subdistrict A.Guarantee system is steady
Fixed capacity and higher resource utilization
Embodiment three
If the first user-center user, it need not consider whether second user is edge customer.Central user is from service
Cell is nearer, and from adjacent cell farther out, and the signal quality for so receiving serving cell can be relatively good, be subject to the interference of adjacent cell compared with
Small, the interference generated to adjacent cell is also small, therefore can use whole frequency bands.
Whole available bands of serving cell A can be used in first user, and need not determine whether adjacent cell HII and
RNTP.The definite method of first user-center user is referring to 102.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modifications, equivalent replacements and improvements are made should be included in the protection of the present invention
Within the scope of.
Claims (5)
- A kind of 1. method of dynamic interference coordination, which is characterized in that the described method includes：Adjacent cell is divided into one group, 1/2 frequency band of each cell dividing system frequency band is as edge band, neighbor cell Edge band it is mutually orthogonal；It is grouped according to cell and determines that the first user is edge customer, second user is to be first with group edge customer；The second base station belonging to second user is sent uplink high interference sensitivity information HII and downlink with respect to narrowband by X2 mouthfuls Power RNTP is sent to the affiliated first base station of the first user；The HII and RNTP include：When filling in HII by the edge of cell B The corresponding Physical Resource Block PRB of frequency band is labeled as 1, and other PRB are labeled as 0；When filling in RNTP by the edge band of cell B Corresponding PRB is labeled as 1, and other PRB are labeled as 0；The cell B is the serving cell of second user；The HII and RNTP that first base station is received the second base station and sent by X2 mouthfuls, the first user is in the edge of first base station frequency Band transmitting data；Including：If the corresponding PRB of the edge band of cell B is labeled as 1 in HII, the first user uses the ascending edge frequency of first base station Band transmission data；If the corresponding PRB of the edge band of cell B is labeled as 1 in RNTP, the first user is used under first base station Row edge band transmits data.
- 2. the method for dynamic interference coordination according to claim 1, which is characterized in that described to determine first according to cell grouping User is edge customer, and second user is to include with group edge customer:The difference of first reporting of user serving cell A Reference Signal Received Power RSRP and adjacent cell B RSRP is less than pre-determined threshold, Then the first user is edge customer；Otherwise, the first user-center user；Second user reports the difference of serving cell B RSRP and adjacent cell A RSRP to be less than pre-determined threshold, then second user is edge User；Otherwise, user centered on second user.
- 3. the method for dynamic interference coordination according to claim 1, which is characterized in that the method is further included：Second Non-flanged user in base station；The corresponding PRB of the edge band of cell B is labeled as 0 when the HII and RNTP includes filling in HII, Other PRB are labeled as 0；By the corresponding PRB of the edge band of cell B labeled as 0 when filling in RNTP, other PRB are labeled as 0。
- 4. the method for dynamic interference coordination according to claim 3, which is characterized in that the method is further included：If in HII information, for the corresponding PRB of edge band of cell B labeled as 0, the first user uses the Whole frequency band of first base station Transmit upstream data；If in RNTP information, for the corresponding PRB of edge band of cell B labeled as 0, the first user uses the first base The Whole frequency band transmission downlink data stood.
- 5. the method for dynamic interference coordination according to claim 2, which is characterized in that the method is further included：First User-center user, the first user transmit uplink/downlink data using the Whole frequency band of first base station.
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| JP5222793B2 (en) * | 2009-06-05 | 2013-06-26 | 株式会社日立製作所 | Wireless communication system, base station and terminal |
| JP5504753B2 (en) * | 2009-08-26 | 2014-05-28 | 富士通株式会社 | Base station, communication system and communication method |
| CN102065549A (en) * | 2009-11-16 | 2011-05-18 | 中国移动通信集团公司 | Interference management method and system in wireless layering network and base station |
| CN102088780B (en) * | 2009-12-03 | 2013-11-06 | 电信科学技术研究院 | Method and base station for avoiding signal interference in hierarchical network |
| CN101815301A (en) * | 2010-03-17 | 2010-08-25 | 华为技术有限公司 | Interference coordination method, system and apparatus |
| CN102271337B (en) * | 2010-06-03 | 2015-09-16 | 中兴通讯股份有限公司 | The processing method of Inter-Cell Interference Coordination information and device |
| KR101750824B1 (en) * | 2010-06-07 | 2017-07-04 | 삼성전자주식회사 | Apparatus and method for controlling interference in hierarchical cell structure wireless communication system |
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| WO2012103717A1 (en) * | 2011-06-28 | 2012-08-09 | 华为技术有限公司 | Method, processor and base station for frequency band resource allocation |
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