Method and device for identifying neighboring pseudorandom number confusion

1. A method for identifying a confusion of neighboring pseudo numbers, comprising:

obtaining a first location information when a mobile station establishes a call with a reference base station where a reference sector is located, and a second location information after establishing a handover, in a process of said call, with a neighboring base station where a valid non-reference sector is located; and

when a deviation between said first location information and said second location information is larger than a threshold and said mobile station drops the call after establishing the handover, determining that the confusion of the neighboring pseudo numbers exists in said neighboring base station.

2. The method as claimed in claim 1 , wherein,

the step of obtaining said first location information comprises:

obtaining a first reference distance between said mobile station and said reference base station; and

determining the first location information of said mobile station according to said first reference distance and a sector azimuth of said reference sector.

3. The method as claimed in claim 2 , wherein,

when the number of valid non-reference sectors is 1, the step of obtaining said second location information comprises:

obtaining a second reference distance between said mobile station and said neighboring base station; and

determining the second location information of said mobile station according to said first reference distance, said second reference distance, and sector lobe angles of said reference sector and/or said valid non-reference sector.

4. The method as claimed in claim 3 , wherein, the step of obtaining said second location information further comprises:

if the number of said valid non-reference sectors is 1, obtaining a circle 1 by taking said reference base station as a centre and said first reference distance as a radius; obtaining a circle 2 by taking said neighboring base station as a centre and said second reference distance as a radius; and determining a valid node of said circle 1 and said circle 2 as the second location information of said mobile station; and

wherein the step of determining said valid node comprises:

if said circle 1 and said circle 2 are separated, a straight line of two centres of two circles intersects with said circle 1 and said circle 2 respectively, virtual intersections are P 1 and P 2 , and said virtual intersection P 1 and said virtual intersection P 2 are located in the sector lobe angle of the reference sector, then determining that said valid node is at a mid location of said virtual intersection P 1 and said virtual intersection P 2 ;

if said circle 1 and said circle 2 are tangent, a point of tangency is P 3 , and said point of tangency P 3 is located in the sector lobe angle of said reference sector, then determining that said valid node is at a location of said point of tangency P 3 ; or

if said circle 1 and said circle 2 intersect, intersections are P 3 and P 4 , and if said intersection P 3 is in the sector lobe angle of said reference sector, while said intersection P 4 is not in the sector lobe angle of said reference sector, then determining that said valid node is at a location of said intersection P 3 ; if both said intersection P 3 and said intersection P 4 are in the sector lobe angle of said reference sector, said intersection P 3 is in the sector lobe angle of said valid non-reference sector, while said intersection P 4 is not in the sector lobe angle of said valid non-reference sector, then determining that said valid node is at the location of said intersection P 3 ; and if both said intersection P 3 and said intersection P 4 are in the sector lobe angles of said reference sector and said valid non-reference sector, then determining that said valid node is at a mid location of said intersection P 3 and said intersection P 4 .

5. The method as claimed in claim 3 , wherein,

when the number of said valid non-reference sectors is at least 2, the step of obtaining said second location information comprises:

obtaining valid intersections of said reference sector with the valid non-reference sectors and a alternate sector in said neighboring base station respectively; and

determining the second location information of said mobile station according to location information of the obtained valid intersections.

6. The method as claimed in claim 5 , wherein said threshold is determined by following values, comprising: a distance from said mobile station to half of the sector lobe angle of said reference sector; and/or an average distance of distances from said mobile station to all the valid intersections.

7. The method as claimed in claim 4 , wherein,

when the number of said valid non-reference sectors is at least 2, the step of obtaining said second location information comprises:

obtaining valid intersections of said reference sector with the valid non-reference sectors and a alternate sector in said neighboring base station respectively; and

determining the second location information of said mobile station according to location information of the obtained valid intersections.

8. The method as claimed in claim 7 , wherein said threshold is determined by following values, comprising: a distance from said mobile station to half of the sector lobe angle of said reference sector; and/or an average distance of distances from said mobile station to all the valid intersections.

9. An apparatus for identifying a confusion of neighboring pseudo numbers, comprising:

an obtaining module, which is configured to: obtain a first location information when a mobile station establishes a call with a reference base station where a reference sector is located, and a second location information after establishing a handover, in a process of said call, with a neighboring base station where a valid non-reference sector is located; and

a determining module, which is configured to: determine that the confusion of the neighboring pseudo numbers exists in said neighboring base station when a deviation between said first location information and said second location information is larger than a threshold and said mobile station drops the call after establishing the handover.

10. The apparatus as claimed in claim 9 , wherein said obtaining module comprises:

a first obtaining unit, which is configured to: obtain a first reference distance between said mobile station and said reference base station; and

a first determining unit, which is configured to: determine said first location information of said mobile station according to said first reference distance and a sector azimuth of said reference sector.

11. The apparatus as claimed in claim 10 , wherein said obtaining module further comprises:

a second obtaining unit, which is configured to: obtain a second reference distance between said mobile station and said neighboring base station; and

a second determining unit, which is configured to: determine said second location information of said mobile station according to said first reference distance, said second reference distance, and sector lobe angles of said reference sector and/or said valid non-reference sector.

12. The apparatus as claimed in claim 11 , wherein

said second determining unit is configured to: if the number of said valid non-reference sectors is 1, obtain a circle 1 by taking said reference base station as a centre and said first reference distance as a radius; obtain a circle 2 by taking said neighboring base station as a centre and said second reference distance as a radius, and determine a valid node of said circle 1 and said circle 2 as the second location information of said mobile station; and

wherein said valid node is determined as the following ways:

if said circle 1 and said circle 2 are separated, a straight line of two centres of two circles intersects with said circle 1 and said circle 2 respectively, virtual intersections are P 1 and P 2 , and said virtual intersection P 1 and said virtual intersection P 2 are located in the sector lobe angle of the reference sector, then determining that said valid node is at a mid location of said virtual intersection P 1 and said virtual intersection P 2 ;

if said circle 1 and said circle 2 are tangent, a point of tangency is P 3 , and said point of tangency P 3 is located in the sector lobe angle of said reference sector, then determining that said valid node is at a location of said point of tangency P 3 ; or

if said circle 1 and said circle 2 intersect, intersections are P 3 and P 4 , and if said intersection P 3 is in the sector lobe angle of said reference sector, while said intersection P 4 is not in the sector lobe angle of said reference sector, then determining that said valid node is at a location of said intersection P 3 ; if both said intersection P 3 and said intersection P 4 are in the sector lobe angle of said reference sector, said intersection P 3 is in the sector lobe angle of said valid non-reference sector, while said intersection P 4 is not in the sector lobe angle of said valid non-reference sector, then determining that said valid node is at the location of said intersection P 3 ; and if both said intersection P 3 and said intersection P 4 are in the sector lobe angles of said reference sector and said valid non-reference sector, then determining that said valid node is at a mid location of said intersection P 3 and said intersection P 4 .

13. The apparatus as claimed in claim 11 , wherein said second determining unit is configured to:

when the number of said valid non-reference sectors is at least 2, obtain valid intersections of said reference sector with the valid non-reference sector and a alternate sector in said neighboring base station respectively; and determine the second location information of said mobile station according to location information of the obtained valid intersections.

14. The apparatus as claimed in claim 13 , wherein said threshold is determined by following values, comprising: a distance from said mobile station to half of the sector lobe angle of said reference sector; and/or an average distance of distances from said mobile station to all the valid intersections.

15. The apparatus as claimed in claim 12 , wherein said second determining unit is configured to:

when the number of said valid non-reference sectors is at least 2, obtain valid intersections of said reference sector with the valid non-reference sector and a alternate sector in said neighboring base station respectively; and determine the second location information of said mobile station according to location information of the obtained valid intersections.

16. The apparatus as claimed in claim 15 , wherein said threshold is determined by following values, comprising: a distance front said mobile station to half of the sector lobe angle of said reference sector; and/or an average distance of distances from said mobile station to all the valid intersections.