CN102075982B - Method and device for determining interference source - Google Patents

Method and device for determining interference source Download PDF

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Publication number
CN102075982B
CN102075982B CN 200910238734 CN200910238734A CN102075982B CN 102075982 B CN102075982 B CN 102075982B CN 200910238734 CN200910238734 CN 200910238734 CN 200910238734 A CN200910238734 A CN 200910238734A CN 102075982 B CN102075982 B CN 102075982B
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China
Prior art keywords
interference
target cell
user terminal
rscp
determining
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CN 200910238734
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Chinese (zh)
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CN102075982A (en
Inventor
梁双春
方媛
周猛
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中国移动通信集团设计院有限公司
中国移动通信集团公司
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Priority to CN 200910238734 priority Critical patent/CN102075982B/en
Publication of CN102075982A publication Critical patent/CN102075982A/en
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Publication of CN102075982B publication Critical patent/CN102075982B/en

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Abstract

The invention discloses a method and device for determining an interference source. The method comprises the following steps of: firstly, obtaining an RSCP (Received Signal Code Power) and an ISCP (Interference on Signal Code Power) of an uplink time slot, which respectively correspond to each subscriber terminal and are contained in a target cell; then, determining the interferences of adjacent cells on the target cell and the interference in the cell according to the obtained RSCP and the ISCP of the uplink time slot, which respectively correspond to each subscriber terminal; and then determining the interference source in the target cell according to the determined interferences of adjacent cells and the interference in the cell. By adopting the technical scheme of the invention, the condition whether network optimization on a communication system is performed or not can not be determined because the interference source of each cell in a communication system can not be determined in the prior art, such problem can be solved in the invention.

Description

Determine method and the device of interference source

Technical field

The present invention relates to communication technical field, particularly a kind of method of definite interference source and device.

Background technology

Along with synchronous code division multiple access (TD-SCDMA of time-division, Time Division-Synchronous Code Division Multiple Access) the continuous expansion of system Construction, the raising of system performance becomes the key job in the network optimization, interference is larger for the impact of the runnability of TD-SCDMA system, may cause higher cutting off rate, therefore also may dwindle the coverage of TD-SCDMA system, overcome the importance that interference in the TD-SCDMA system just becomes the network optimization.

The interference of TD-SCDMA system is mainly the multiple access that causes because of code division multiple access and disturbs, multiple access disturbs can be divided into again in the residential quarter and disturbs and presence of intercell interference, disturb in the residential quarter and be: for each user in Target cell, the interference that the signal of other users in this Target cell causes this user's signal; Presence of intercell interference is: for each user in Target cell, and the interference that the signal of the user in other residential quarters causes this user's signal.Presence of intercell interference comprises adjacent cell to be disturbed, namely for each user in Target cell, and the interference that the signal of the user in the residential quarter adjacent with this Target cell causes this user's signal, the presence of intercell interference that the user is subject to is mainly adjacent cell and disturbs.Wherein disturb sum in Target cell in the suffered residential quarter of each user, be in this Target cell suffered residential quarter and disturb, in Target cell, the suffered adjacent cell of each user is disturbed sum, is the suffered adjacent cell interference of this Target cell.

If the interference that Target cell is subject to is mainly in the residential quarter and disturbs, the interference source of this Target cell is just to disturb in the residential quarter so, disturbs if the interference that Target cell is subject to is mainly adjacent cell, and the interference source of this Target cell is that adjacent cell is disturbed so.

The smart antenna that the TD-SCDMA system adopts and associated detection technique can be realized inhibitory action preferably to disturbing in the residential quarter of each residential quarter, but the inhibition ability that adjacent cell is disturbed a little less than, therefore the interference source in certain residential quarter is that adjacent cell is disturbed, the i.e. interference that is subject to of this residential quarter is mainly adjacent cell when disturbing, and need to be optimized processing to network.

exist many method of testings that the runnability of communication system is monitored in prior art, for example dial quality test (CQT, Call Quality Test), automatic drive test system etc., but existing method of testing can only be after the runnability of monitoring out communication system be relatively poor, utilize the decline of various analysis means analyzing communication system performance whether to be caused by interference, and can not determine out the interference source of each residential quarter, for example can not determine out that the suffered interference in certain residential quarter is mainly to disturb in adjacent cell interference or residential quarter, therefore just can not determine also that whether communication system being carried out the network optimization processes.

Summary of the invention

The embodiment of the present invention provides a kind of method and device of definite interference source, can not determine the interference source of each residential quarter in communication system in order to solve prior art, causes the problem of whether communication system being carried out the network optimization of can not determine.

Embodiment of the present invention technical scheme is as follows:

A kind of method of definite interference source, the method comprising the steps of: each user terminal that the acquisition Target cell comprises is received signal code power RSCP and the Interference Signal Code Power ISCP of corresponding ascending time slot respectively; According to each user terminal that obtains RSCP and the ISCP of corresponding ascending time slot respectively, determine that the suffered adjacent cell of this Target cell is disturbed and the residential quarter in interference; Disturb in above-mentioned adjacent cell interference and residential quarter and determine respectively in the following way:

I othercell = Σ i = 1 N ( ISCP i - ( 1 - β ) Σ j = 1 , j ≠ i N RSCP j ) N

I intracell = ( 1 - β ) Σ i = 1 N RSCP i N

Wherein, I OthercellFor adjacent cell is disturbed;

I IntracellFor disturbing in the residential quarter;

β is the joint-detection factor;

N is the quantity of user terminal in this Target cell;

RSCP iRSCP for ascending time slot corresponding to i user terminal in this Target cell;

RSCP jRSCP for ascending time slot corresponding to j user terminal in this Target cell;

ISCP iISCP for ascending time slot corresponding to i user terminal in this Target cell;

And according to disturbing in the adjacent cell interference of determining and residential quarter, determine the interference source of this Target cell.

Preferably, each user terminal that the acquisition Target cell comprises is RSCP and the ISCP of corresponding ascending time slot respectively, specifically comprises: each user terminal that the acquisition Target cell comprises reports respectively the measurement report of universal land radio access web UTRAN; Each user terminal that comprises for this Target cell from the measurement report of this user terminal of obtaining, is determined RSCP and the ISCP of the ascending time slot that this user terminal is corresponding.

Preferably, according to disturbing in the adjacent cell interference of determining and residential quarter, determine the interference source of this Target cell, specifically comprise: according to disturbing in the adjacent cell interference of determining and residential quarter, determine the interference ratio of disturbing in adjacent cell interference and residential quarter; The interference ratio of determining and the defined threshold of presetting are compared; If the interference ratio that relatively obtains determining is greater than default defined threshold, the interference source of confirming this Target cell is that adjacent cell is disturbed; And if the interference ratio that relatively obtains determining is not more than default defined threshold, the interference source of confirming this Target cell is to disturb in the residential quarter.

Preferably, described method also comprises: disturb if the interference source of determining is adjacent cell, determine Network Optimization Strategy; And according to the Network Optimization Strategy of determining, carry out the network optimization and process.

Preferably, described Target cell is the residential quarter in TDS-CDMA system.

A kind of device of definite interference source comprises: obtain the unit, be used for obtaining each user terminal that Target cell comprises received signal code power RSCP and the Interference Signal Code Power ISCP of corresponding ascending time slot respectively; The first determining unit is used for according to obtaining each user terminal that the unit obtains RSCP and the ISCP of corresponding ascending time slot respectively, determine that the suffered adjacent cell of this Target cell is disturbed and the residential quarter in interference; Disturb in described adjacent cell interference and residential quarter and determine respectively in the following way:

I othercell = Σ i = 1 N ( ISCP i - ( 1 - β ) Σ j = 1 , j ≠ i N RSCP j ) N

I intracell = ( 1 - β ) Σ i = 1 N RSCP i N

Wherein, I OthercellFor adjacent cell is disturbed; I IntracellFor disturbing in the residential quarter; β is the joint-detection factor; N is the quantity of user terminal in this Target cell; RSCP iRSCP for ascending time slot corresponding to i user terminal in this Target cell; RSCP jRSCP for ascending time slot corresponding to j user terminal in this Target cell; ISCP iISCP for ascending time slot corresponding to i user terminal in this Target cell; The second determining unit for disturbing in the adjacent cell interference of determining according to the first determining unit and residential quarter, is determined the interference source of this Target cell.

Preferably, obtain the unit and specifically comprise: obtain subelement, be used for obtaining the measurement report that each user terminal that Target cell comprises reports respectively universal land radio access web UTRAN; First determines subelement, is used for each user terminal of comprising for this Target cell, from the measurement report that obtains this user terminal that subelement obtains, determines RSCP and the ISCP of the ascending time slot that this user terminal is corresponding.

Preferably, the second determining unit specifically comprises: second determines subelement, for disturbing in the adjacent cell interference of determining according to the first determining unit and residential quarter, determines the interference ratio of disturbing in adjacent cell interference and residential quarter; Relatively subelement, be used for determining that with second the subelement interference ratio of determining and the defined threshold of presetting compare; Confirm subelement, be used for relatively obtaining second when determining interference ratio that subelement determines greater than default defined threshold at subelement relatively, the interference source of confirming this Target cell is that adjacent cell is disturbed, and relatively obtaining second when determining that interference ratio that subelement is determined is not more than default defined threshold at subelement relatively, the interference source of confirming this Target cell is the interference residential quarter in.

Preferably, described device also comprises: the 3rd determining unit is used for determining Network Optimization Strategy when the interference source that the second determining unit is determined is the adjacent cell interference; The optimization process unit for the Network Optimization Strategy of determining according to the 3rd determining unit, carries out the network optimization and processes.

In embodiment of the present invention technical scheme, at first obtain each user terminal that Target cell comprises RSCP and the ISCP of corresponding ascending time slot respectively, then distinguish RSCP and the ISCP of corresponding ascending time slot according to each user terminal that obtains, determine that the suffered adjacent cell of this Target cell is disturbed and the residential quarter in interference, again according to disturbing in the adjacent cell interference of determining and residential quarter, determine the interference source of this Target cell, so just can determine whether that communication system is carried out the network optimization to be processed according to the interference source of determining.

Description of drawings

Fig. 1 is in the embodiment of the present invention, determines the method flow schematic diagram of interference source;

Fig. 2 is in the embodiment of the present invention, determines the apparatus structure schematic diagram of interference source.

Embodiment

Embodiment of the present invention technical scheme main realized principle, embodiment and the beneficial effect that should be able to reach is at length set forth below in conjunction with each accompanying drawing.

As shown in Figure 1, in the embodiment of the present invention, determine the method flow diagram of interference source, its concrete processing procedure is as follows:

Step 11, each user terminal that the acquisition Target cell comprises is the received signal code power (RSCP of corresponding ascending time slot respectively, Received Signal Code Power) and Interference Signal Code Power (ISCP, Interference Signal Code Power);

In the embodiment of the present invention, if need to determine the interference source of residential quarter A, residential quarter A is just Target cell.

Distinguish corresponding ascending time slot for each user terminal that Target cell comprises, the RSCP of this time slot is in this time slot, DPCH (DPCH, Dedicated Physical Channel), Physical Random Access Channel (PRACH, Physical Random Access Channel), some signal code powers of receiving on the physical channel such as Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel).

For ascending time slot corresponding to each user terminal difference that Target cell comprises, the ISCP of this time slot is in this time slot, the interference in the upper reception signal of measuring of intermediate code (Midamble Code).

Obtain in the embodiment of the present invention each user terminal that Target cell comprises respectively the RSCP of corresponding ascending time slot and ISCP can but be not limited to realize by following manner:

At first obtain each user terminal that Target cell comprises and report respectively universal land radio access web (UTRAN, Universal Terrestrial Radio Access Network) measurement report, the corresponding ascending time slot of each user terminal, the RSCP and the ISCP that have all comprised ascending time slot corresponding to this user terminal in the measurement report that each user terminal sends, then each user terminal that comprises for this Target cell, from the measurement report that this user terminal that obtains sends, determine RSCP and the ISCP of the ascending time slot that this user terminal is corresponding.

Step 12, according to each user terminal that obtains RSCP and the ISCP of corresponding ascending time slot respectively, determine that the suffered adjacent cell of this Target cell is disturbed and the residential quarter in interference;

Can but be not limited to by following manner determine respectively that adjacent cell is disturbed and the residential quarter in disturb:

I othercell = Σ i = 1 N ( ISCP i - ( 1 - β ) Σ j = 1 , j ≠ i N RSCP j ) N

I intracell = ( 1 - β ) Σ i = 1 N RSCP i N

Wherein, I OthercellFor adjacent cell is disturbed; I IntracellFor disturbing in the residential quarter; β is the joint-detection factor; N is the quantity of user terminal in this Target cell; RSCP iRSCP for ascending time slot corresponding to i user terminal in this Target cell; RSCP jRSCP for ascending time slot corresponding to j user terminal in this Target cell; ISCP iISCP for ascending time slot corresponding to i user terminal in this Target cell.

Step 13 is disturbed and presence of intercell interference according to the adjacent cell of determining, and determines the interference source of this Target cell.

Wherein, disturb and presence of intercell interference is determined the interference source of this Target cell according to the adjacent cell determined, can but be not limited to following process:

At first according to disturbing in the adjacent cell interference of determining and residential quarter, determine the interference ratio of interference in adjacent cell interference and residential quarter, the interference ratio of determining and the defined threshold of presetting are compared, if the interference ratio that relatively obtains determining is greater than default defined threshold, the interference source of confirming this Target cell is that adjacent cell is disturbed, if the interference ratio that relatively obtains determining is not more than default defined threshold, the interference source of confirming this Target cell is to disturb in the residential quarter.

Wherein the afore mentioned rules threshold value can but be not limited to 1, if defined threshold is 1, so in the embodiment of the present invention, can directly the adjacent cell of determining be disturbed and the residential quarter in disturb and compare, will be larger as interference source.

The interference ratio of disturbing in adjacent cell interference and residential quarter is determined by following manner:

s = I othercell I intracell = Σ i = 1 N ( ISCP i - ( 1 - β ) Σ j = 1 , j ≠ i N RSCP j ) ( 1 - β ) Σ i = 1 N RSCP i

For example, Target cell is residential quarter 1, RSCP and ISCP according to each ascending time slot in residential quarter 1, determining the interference ratio s that disturbs in the suffered adjacent cell interference in residential quarter 1 and residential quarter is 1.5, think that the interference that residential quarter 1 is subject to is mainly the adjacent cell interference, the interference source that can confirm so residential quarter 1 is that adjacent cell is disturbed;

If RSCP and ISCP according to each ascending time slot in residential quarter 1, determining the interference ratio s that disturbs in the suffered adjacent cell interference in residential quarter 1 and residential quarter is 0.95, think that the interference that residential quarter 1 is subject to is mainly interference in the residential quarter, the interference source that can confirm so residential quarter 1 is to disturb in the residential quarter.

If it is that adjacent cell is disturbed that step 13 is determined the interference source of Target cell, can also further carry out the network optimization to communication system and process, be specially:

At first determine Network Optimization Strategy, then according to the Network Optimization Strategy of determining, carry out the network optimization and process.

Wherein, Network Optimization Strategy can but be not limited to: distribute respectively different frequencies for the edge customer of each residential quarter adjacent from this Target cell.

In the embodiment of the present invention, Target cell can but be not limited to residential quarter in the TD-SCDMA system, for example, can also be Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wide-band Code Division Multiple Access) residential quarter in system, or be the residential quarter in OFDM access (OFDMA, Orthogonal Frequency Division Multiplexing Access) system.

By above-mentioned processing procedure as can be known, in embodiment of the present invention technical scheme, at first obtain each user terminal that Target cell comprises RSCP and the ISCP of corresponding ascending time slot respectively, then distinguish RSCP and the ISCP of corresponding ascending time slot according to each user terminal that obtains, determine that the suffered adjacent cell of this Target cell is disturbed and the residential quarter in interference, again according to disturbing in the adjacent cell interference of determining and residential quarter, determine the interference source of this Target cell, so just can determine whether that communication system is carried out the network optimization to be processed according to the interference source of determining.

Accordingly, the embodiment of the present invention also provides a kind of device of definite interference source, as shown in Figure 2, comprise obtaining unit 21, the first determining unit 22, the second determining unit 23, wherein:

Obtain unit 21, be used for obtaining each user terminal that Target cell comprises RSCP and the ISCP of corresponding ascending time slot respectively;

The first determining unit 22 is used for according to obtaining each user terminal that unit 21 obtains RSCP and the ISCP of corresponding ascending time slot respectively, determine that the suffered adjacent cell of this Target cell is disturbed and the residential quarter in interference;

The second determining unit 23 for disturbing in the adjacent cell interference of determining according to the first determining unit 22 and residential quarter, is determined the interference source of this Target cell.

Preferably, obtain unit 21 and comprise that specifically obtaining subelement and first determines subelement, wherein:

Obtain subelement, be used for obtaining the measurement report that each user terminal that Target cell comprises reports respectively UTRAN;

First determines subelement, is used for each user terminal of comprising for this Target cell, from the measurement report that obtains this user terminal that subelement obtains, determines RSCP and the ISCP of the ascending time slot that this user terminal is corresponding.

Preferably, the second determining unit 23 comprises that specifically second determines subelement, comparison subelement and confirm subelement, wherein:

Second determines subelement, for disturbing in the adjacent cell interference of determining according to the first determining unit and residential quarter, determines the interference ratio of disturbing in adjacent cell interference and residential quarter;

Relatively subelement, be used for determining that with second the subelement interference ratio of determining and the defined threshold of presetting compare;

Confirm subelement, be used for relatively obtaining second when determining interference ratio that subelement determines greater than default defined threshold at subelement relatively, the interference source of confirming this Target cell is that adjacent cell is disturbed, and relatively obtaining second when determining that interference ratio that subelement is determined is not more than default defined threshold at subelement relatively, the interference source of confirming this Target cell is the interference residential quarter in.

Preferably, said apparatus also comprises the 3rd determining unit and optimization process unit, wherein:

The 3rd determining unit is used for determining Network Optimization Strategy when the interference source that the second determining unit 23 is determined is the adjacent cell interference;

The optimization process unit for the Network Optimization Strategy of determining according to the 3rd determining unit, carries out the network optimization and processes.

Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.

Claims (9)

1. the method for a definite interference source, is characterized in that, comprising:
Each user terminal that the acquisition Target cell comprises is received signal code power RSCP and the Interference Signal Code Power ISCP of corresponding ascending time slot respectively;
According to each user terminal that obtains RSCP and the ISCP of corresponding ascending time slot respectively, determine that the suffered adjacent cell of this Target cell is disturbed and the residential quarter in interference; Disturb in described adjacent cell interference and residential quarter and determine respectively in the following way:
I othercell = Σ i = 1 N ( ISCP i - ( 1 - β ) Σ j = 1 , j ≠ i N RSCP j ) N
I intracell = ( 1 - β ) Σ i = 1 N RSCP i N
Wherein, I OthercellFor adjacent cell is disturbed;
I IntracellFor disturbing in the residential quarter;
β is the joint-detection factor;
N is the quantity of user terminal in this Target cell;
RSCP iRSCP for ascending time slot corresponding to i user terminal in this Target cell;
RSCP jRSCP for ascending time slot corresponding to j user terminal in this Target cell;
ISCP iISCP for ascending time slot corresponding to i user terminal in this Target cell; And
According to disturbing in the adjacent cell interference of determining and residential quarter, determine the interference source of this Target cell.
2. the method for definite interference source as claimed in claim 1, is characterized in that, each user terminal that the acquisition Target cell comprises is RSCP and the ISCP of corresponding ascending time slot respectively, specifically comprises:
Each user terminal that the acquisition Target cell comprises reports respectively the measurement report of universal land radio access web UTRAN;
Each user terminal that comprises for this Target cell from the measurement report of this user terminal of obtaining, is determined RSCP and the ISCP of the ascending time slot that this user terminal is corresponding.
3. the method for definite interference source as claimed in claim 1, is characterized in that, according to disturbing in the adjacent cell interference of determining and residential quarter, determines the interference source of this Target cell, specifically comprises:
According to disturbing in the adjacent cell interference of determining and residential quarter, determine the interference ratio of disturbing in adjacent cell interference and residential quarter;
The interference ratio of determining and the defined threshold of presetting are compared;
If the interference ratio that relatively obtains determining is greater than default defined threshold, the interference source of confirming this Target cell is that adjacent cell is disturbed; And
If the interference ratio that relatively obtains determining is not more than default defined threshold, the interference source of confirming this Target cell is to disturb in the residential quarter.
4. the method for definite interference source as claimed in claim 1, is characterized in that, described method also comprises:
Disturb if the interference source of determining is adjacent cell, determine Network Optimization Strategy; And
According to the Network Optimization Strategy of determining, carry out the network optimization and process.
5. as the method for 1~4 described definite interference source of arbitrary claim, it is characterized in that, described Target cell is the residential quarter in TDS-CDMA system.
6. the device of a definite interference source, is characterized in that, comprising:
Obtain the unit, be used for obtaining each user terminal that Target cell comprises received signal code power RSCP and the Interference Signal Code Power ISCP of corresponding ascending time slot respectively;
The first determining unit is used for according to obtaining each user terminal that the unit obtains RSCP and the ISCP of corresponding ascending time slot respectively, determine that the suffered adjacent cell of this Target cell is disturbed and the residential quarter in interference; Disturb in described adjacent cell interference and residential quarter and determine respectively in the following way:
I othercell = Σ i = 1 N ( ISCP i - ( 1 - β ) Σ j = 1 , j ≠ i N RSCP j ) N
I intracell = ( 1 - β ) Σ i = 1 N RSCP i N
Wherein, I OthercellFor adjacent cell is disturbed; I IntracellFor disturbing in the residential quarter; β is the joint-detection factor; N is the quantity of user terminal in this Target cell; RSCP iRSCP for ascending time slot corresponding to i user terminal in this Target cell; RSCP jRSCP for ascending time slot corresponding to j user terminal in this Target cell; ISCP iISCP for ascending time slot corresponding to i user terminal in this Target cell;
The second determining unit for disturbing in the adjacent cell interference of determining according to the first determining unit and residential quarter, is determined the interference source of this Target cell.
7. the device of definite interference source as claimed in claim 6, is characterized in that, obtains the unit and specifically comprise:
Obtain subelement, be used for obtaining the measurement report that each user terminal that Target cell comprises reports respectively universal land radio access web UTRAN;
First determines subelement, is used for each user terminal of comprising for this Target cell, from the measurement report that obtains this user terminal that subelement obtains, determines RSCP and the ISCP of the ascending time slot that this user terminal is corresponding.
8. the device of definite interference source as claimed in claim 6, is characterized in that, the second determining unit specifically comprises:
Second determines subelement, for disturbing in the adjacent cell interference of determining according to the first determining unit and residential quarter, determines the interference ratio of disturbing in adjacent cell interference and residential quarter;
Relatively subelement, be used for determining that with second the subelement interference ratio of determining and the defined threshold of presetting compare;
Confirm subelement, be used for relatively obtaining second when determining interference ratio that subelement determines greater than default defined threshold at subelement relatively, the interference source of confirming this Target cell is that adjacent cell is disturbed, and relatively obtaining second when determining that interference ratio that subelement is determined is not more than default defined threshold at subelement relatively, the interference source of confirming this Target cell is the interference residential quarter in.
9. the device of definite interference source as claimed in claim 6, is characterized in that, described device also comprises:
The 3rd determining unit is used for determining Network Optimization Strategy when the interference source that the second determining unit is determined is the adjacent cell interference;
The optimization process unit for the Network Optimization Strategy of determining according to the 3rd determining unit, carries out the network optimization and processes.
CN 200910238734 2009-11-23 2009-11-23 Method and device for determining interference source CN102075982B (en)

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CN104602269B (en) * 2013-10-30 2018-09-04 中国移动通信集团北京有限公司 A kind of uplink interference localization method and system

Citations (2)

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Publication number Priority date Publication date Assignee Title
CN1618247A (en) * 2002-01-25 2005-05-18 艾利森电话股份有限公司 Method for interference source identification
CN1798414A (en) * 2004-12-23 2006-07-05 华为技术有限公司 Method for locating interference source in up going route

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1618247A (en) * 2002-01-25 2005-05-18 艾利森电话股份有限公司 Method for interference source identification
CN1798414A (en) * 2004-12-23 2006-07-05 华为技术有限公司 Method for locating interference source in up going route

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