CN104780546A - Dynamic interference coordination method - Google Patents
Dynamic interference coordination method Download PDFInfo
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- CN104780546A CN104780546A CN201410017291.5A CN201410017291A CN104780546A CN 104780546 A CN104780546 A CN 104780546A CN 201410017291 A CN201410017291 A CN 201410017291A CN 104780546 A CN104780546 A CN 104780546A
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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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Abstract
The invention discloses a dynamic interference coordination method. The method comprises the steps that adjacent cells are divided into a group, each cell divides half frequency band of a system frequency band and uses as an edge frequency band, and the edge frequency bands of adjacent cells are mutually orthometric; according to cell grouping, a first user is determined as an edge user, and a second user is determined as a first same group edge user; a second eNodeB, which the second user belongs to, sends uplink high interference sensitivity information (HII) and downlink relative narrowband tx power (RNTP) to a first eNodeB which the first user belongs to through an X2 port; and the first eNodeB receives the HII and RNTP sent by the second eNodeB through the X2 port, and the first user transmits data on the edge frequency band of the first eNodeB. The method not only can prevent interference, but also can guarantee stable capacity and higher resource use ratio of the system.
Description
Technical field
The application relates to communication technical field, more specifically, relates to a kind of method of dynamic interference coordination.
Background technology
LTE technology can be applicable to the various scenes comprising high ferro scene.Based on the high ferro covering system of LTE technology as wireless backhaul technology, support the high-speed multimedia transmission of car ground, the multiple business access such as 2G/3G and WiFi in compartment.
In view of the railway system the restriction of obtainable frequency spectrum resource, high ferro covers should adopt identical networking.Under identical networking scene, serious co-channel interference can be there is when two neighbor cells exist the train and close together split, or in community, have train to rest in cell boarder, and also have stronger interference between the train opened of adjacent area.At this moment need application of interference coordination technique effectively to evade interference, ensure the telecommunication service quality of user in train.
LTE system defines for up-downgoing interfere information mutual between base station (eNodeB), and up high interference susceptibility information (HII) and descending relative arrowband transmitted power (RNTP), transmit in load information message.HII indicates the interference sensitivity level of each Physical Resource Block (PRB), and wherein high interference susceptibility band reservation gives this Cell Edge User, and adjacent cell edge customer also avoids this frequency band as far as possible simultaneously.Whether the transmitting power that RNTP indicates each PRB to use exceedes this thresholding, wherein by the band reservation that do not limit power to edge customer, and adjacent area edge customer also avoids this frequency band as far as possible, realizes interference coordination with this, evades interference.
Cannot judge whether adjacent area exists interference source in traditional LTE system community, and only by judging whether this community user enters edge, if enter edge, limit it and using edge band.This method is inapplicable for high-speed railways, can cause the significant wastage of system resource.Because for high-speed railways, only have and just there is interference source when adjacent area has train to open or train rests on cell edge, otherwise interference source does not exist.When adjacent area does not have an interference source, this Cell Edge User is also limited in edge band, causes the waste of system resource.
Summary of the invention
The embodiment of the present invention proposes a kind of method of dynamic interference coordination, can avoid interference, and ensures again the capacity of system stability and higher resource utilization.
The technical scheme of the embodiment of the present invention is as follows:
A method for dynamic interference coordination, described method comprises:
Adjacent microzonation is divided into one group, and 1/2 frequency band of each microzonation subsystem frequency band is as edge band, and the edge band of neighbor cell is mutually orthogonal;
Be edge customer according to cell group determination first user, the second user for first with organizing edge customer;
Up high interference susceptibility information HII is sent to the first base station belonging to first user with descending relative arrowband transmitted power RNTP by X2 mouth by the second base station belonging to the second user;
First base station receives HII and RNTP of the second base station transmission by X2 mouth, and first user is at the edge band transmitting data of the first base station.
Described is edge customer according to cell group determination first user, and the second user is for comprising with group edge customer:
First user reports the difference of Serving cell A Reference Signal Received Power RSRP and adjacent cell B RSRP to be less than pre-determined threshold, then first user is edge customer; Otherwise, user centered by first user;
The difference of the second reporting of user Serving cell B RSRP and adjacent cell A RSRP is less than pre-determined threshold, then the second user is edge customer; Otherwise, the second user-center user.
Described HII and RNTP comprises: the PRB corresponding at the edge band filling in HII Shi Jiang community B is labeled as 1, and other PRB is labeled as 0; The PRB corresponding at the edge band filling in RNTP Shi Jiang community B is labeled as 1, and other PRB is labeled as 0.
HII and RNTP that the second base station that described first base station is received by X2 mouth sends, first user comprises at the edge band transmitting data of the first base station:
If the PRB that the edge band of HII small area B is corresponding is labeled as 1, then first user uses the ascending edge frequency band transmission data of the first base station; If the PRB that the edge band of RNTP small area B is corresponding is labeled as 1, then first user uses the descending edge band transmission data of the first base station.
Described method comprises further: non-flanged user in the second base station; The PRB that described HII and RNTP comprises the edge band of filling in HII Shi Jiang community B corresponding is labeled as 0, and other PRB is labeled as 0; The PRB filling in the edge band of RNTP Shi Jiang community B corresponding is labeled as 0, and other PRB is labeled as 0.
Described method comprises further:
If in HII information, the PRB that the edge band of community B is corresponding is labeled as 0, and first user uses the Whole frequency band transmit ascending data of the first base station; If in RNTP information, the PRB that the edge band of community B is corresponding is labeled as 0, and first user uses the Whole frequency band transmitting downlink data of the first base station.
Described method comprises further: user centered by first user, and first user uses the Whole frequency band transmission uplink/downlink data of the first base station.
As can be seen from technique scheme, in embodiments of the present invention adjacent microzonation is divided into one group, 1/2 frequency band of each microzonation subsystem frequency band is as edge band, and the edge band of neighbor cell is mutually orthogonal; Be edge customer according to cell group determination first user, the second user for first with organizing edge customer; HII and RNTP is sent to the first base station belonging to first user by X2 mouth by the second base station belonging to the second user; First base station receives HII and RNTP of the second base station transmission by X2 mouth, and first user is at the edge band transmitting data of the first base station.Because the edge band of neighbor cell is mutually orthogonal, when two users are respectively the edge customer with group, determine the edge band transmitting data of first user in the first base station according to HII and RNTP.Can avoid interference like this, when not with group edge customer, the capacity of system stability and higher resource utilization can be ensured again.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram of dynamic interference coordination;
Fig. 2 is Resourse Distribute schematic diagram.
Embodiment
Express clearly clear for making the object, technical solutions and advantages of the present invention, below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
In embodiments of the present invention, for this special application scenarios of high ferro, two neighbor cells are divided into one group, ensure that the utilance that system resource is higher, when making neighbor cell all there is edge customer, power system capacity can not decline.
X2 mouth HII and RNTP simultaneously utilizing LTE to define, not only transmit the edge band information of pre-planning, and impliedly whether transmission in good time exists the information of interference source, the band resource of edge customer is determined with this, both the interference between the train of adjacent area had effectively been avoided, when also making noiseless source, edge customer can use whole frequency band, greatly improves power system capacity and resource utilization.
Below there are two base stations, community A is made up of the first base station and first user, and community B is made up of the second base station and the second base station.Technical scheme of the present invention is described in detail below in conjunction with specific embodiment.
Embodiment one
Community A and community B divides into synchronously, and first user and the second user are at same group, and community A is the Serving cell of first user, and community B is first user adjacent cell; Community A is the adjacent cell of the second user, and community B is the Serving cell of the second user.First user is edge customer, and the second user is first with organizing edge customer.
See the method flow schematic diagram that accompanying drawing 1 is dynamic interference coordination, specifically comprise the following steps:
101, adjacent microzonation is divided into one group, 1/2 frequency band of each microzonation subsystem frequency band is as edge band, and the edge band of neighbor cell is mutually orthogonal.
For community banded under high ferro scene distribution, see accompanying drawing 2, divide two neighbor cells into one group, 1/2 frequency band of each microzonation subsystem frequency band is as edge band, and the edge band of Liang Ge community is mutually orthogonal.So just can avoid in same group, being in the interference between the first user of edge band and the second user.
102, be edge customer according to cell group determination first user, the second user for first with organizing edge customer.
Serving cell judges whether train enters cell edge, if train enters cell edge, is edge customer, otherwise centered by user.Concrete determination methods is the RSRP of Serving cell Reference Signal Received Power (RSRP) according to reporting of user and adjacent cell.Judge that whether the difference of the RSRP of Serving cell and adjacent cell is lower than pre-determined threshold, if then user is edge customer, and the adjacent cell of correspondence is labeled as the interfered cell of user; Otherwise centered by user.
Particularly, first user reports the difference of Serving cell A RSRP and adjacent cell B RSRP to be less than pre-determined threshold, then first user is edge customer; The difference of the second reporting of user community B RSRP and community A RSRP is less than pre-determined threshold, then the second user is edge customer.
Because the edge band of community A and community B is mutually orthogonal, the first user being in the edge band of community A does not then interfere with each other with the second user of the edge band being in community B, can normally work.
HII and RNTP is sent to the first base station belonging to first user by X2 mouth by the second base station 103, belonging to the second user; First base station receives HII and RNTP of the second base station transmission by X2 mouth, and first user is at the edge band transmitting data of the first base station.
When first user enters A edge, community and is defined as edge customer, because the second user is first with organizing edge customer, then community A triggers X2 mouth load information message to community B, carries up HII and descending RNTP.The PRB position mark that the edge band of the filling method Shi Jiang community B of HII is corresponding is 1(HII frequency band), other PRB are labeled as the non-HII frequency band of 0(); The PRB position mark that the edge band of the filling method Shi Jiang community B of RNTP is corresponding is 1(power not limited frequency band), other PRB are labeled as 0(power limited frequency band).
The edge band transmitting data of first user in the first base station is determined by HII and RNTP obtained in first base station.Namely corresponding according to the edge band of community B in HII PRB is labeled as 1, and first user uses the ascending edge frequency band transmission data of the first base station; PRB corresponding according to the edge band of community B in RNTP is labeled as 1, and first user uses the descending edge band transmission data of the first base station.
Embodiment two
In second base station during non-flanged user, namely the second user is the central user in the B of community, or the second user is switched to other community.
First user place Serving cell A triggers the load information message of X2 mouth to the second user affiliated subdistrict B, carries up HII and descending RNTP.The PRB position mark that whole available band of the filling method Shi Jiang community B of HII information are corresponding is the non-HII frequency band of 0(); The PRB position mark that whole available band of the filling method Shi Jiang community B of RNTP information are corresponding is 0(power limited frequency band).
Like this, first user just can use whole frequency band transmission uplink/downlink data of affiliated subdistrict A.Ensure the capacity of system stability and higher resource utilization
Embodiment three
If user centered by first user, then without the need to considering whether the second user is edge customer.Central user is close to Serving cell, and away from adjacent cell, the signal quality receiving Serving cell like this can be relatively good, and the interference being subject to adjacent cell is less, and the interference produced adjacent cell is also little, therefore can use whole frequency band.
First user can use whole available band of Serving cell A, and does not need HII and RNTP judging adjacent cell further.Centered by first user, the defining method of user is see 102.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a method for dynamic interference coordination, is characterized in that, described method comprises:
Adjacent microzonation is divided into one group, and 1/2 frequency band of each microzonation subsystem frequency band is as edge band, and the edge band of neighbor cell is mutually orthogonal;
Be edge customer according to cell group determination first user, the second user for first with organizing edge customer;
Up high interference susceptibility information HII is sent to the first base station belonging to first user with descending relative arrowband transmitted power RNTP by X2 mouth by the second base station belonging to the second user;
First base station receives HII and RNTP of the second base station transmission by X2 mouth, and first user is at the edge band transmitting data of the first base station.
2. the method for dynamic interference coordination according to claim 1, it is characterized in that, described is edge customer according to cell group determination first user, and the second user is for comprising with group edge customer:
First user reports the difference of Serving cell A Reference Signal Received Power RSRP and adjacent cell B RSRP to be less than pre-determined threshold, then first user is edge customer; Otherwise, user centered by first user;
The difference of the second reporting of user Serving cell B RSRP and adjacent cell A RSRP is less than pre-determined threshold, then the second user is edge customer; Otherwise, the second user-center user.
3. the method for dynamic interference coordination according to claim 1, it is characterized in that, described HII and RNTP comprises: the PRB corresponding at the edge band filling in HII Shi Jiang community B is labeled as 1, and other PRB is labeled as 0; The PRB corresponding at the edge band filling in RNTP Shi Jiang community B is labeled as 1, and other PRB is labeled as 0.
4. the method for dynamic interference coordination according to claim 3, is characterized in that, HII and RNTP that the second base station that described first base station is received by X2 mouth sends, and first user comprises at the edge band transmitting data of the first base station:
If the PRB that the edge band of HII small area B is corresponding is labeled as 1, then first user uses the ascending edge frequency band transmission data of the first base station; If the PRB that the edge band of RNTP small area B is corresponding is labeled as 1, then first user uses the descending edge band transmission data of the first base station.
5. the method for dynamic interference coordination according to claim 1, it is characterized in that, described method comprises further: non-flanged user in the second base station; The PRB that described HII and RNTP comprises the edge band of filling in HII Shi Jiang community B corresponding is labeled as 0, and other PRB is labeled as 0; The PRB filling in the edge band of RNTP Shi Jiang community B corresponding is labeled as 0, and other PRB is labeled as 0.
6. the method for dynamic interference coordination according to claim 5, it is characterized in that, described method comprises further:
If in HII information, the PRB that the edge band of community B is corresponding is labeled as 0, and first user uses the Whole frequency band transmit ascending data of the first base station; If in RNTP information, the PRB that the edge band of community B is corresponding is labeled as 0, and first user uses the Whole frequency band transmitting downlink data of the first base station.
7. the method for dynamic interference coordination according to claim 2, it is characterized in that, described method comprises further: user centered by first user, and first user uses the Whole frequency band transmission uplink/downlink data of the first base station.
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Cited By (1)
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