Portable terminal equipment and mobile communication system

• US 20030220113A1
• Filed: 05/09/2003
• Published: 11/27/2003
• Est. Priority Date: 05/23/2002
• Status: Abandoned Application

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Oda, Toshiyuki
• Application Number:
  US10/434,979
• Publication Number:
  US 20030220113A1
• Time in Patent Office: Days
• US Class Current: 455/446
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 16/24 Cell structures

Abstract

This invention relates to a mobile communication system having a plurality of radio base stations which respectively form cells/sectors and communicate with mobile units existing in the cells/sectors. A mobile unit transmits, to a radio base station, information by which the position of the mobile unit can be estimated. A radio base station estimates the shape of a cell/sector formed by the radio base station on the basis of information transmitted from a mobile unit. If this system further includes a higher rank station which connects radio base stations, reporting the shape of a cell/sector estimated by a radio base station to the higher rank station will allow a plurality of radio base stations to share the shape of the cell/sector.

Claims

1. A mobile communication system including mobile units and a plurality of radio base stations which respectively form cells/sectors and communicate with said mobile units existing in the cells/sectors,

wherein said radio base station estimates a shape of the cell/sector formed by said radio base station on the basis of information transmitted from said mobile unit.

2. A system according to claim 1, wherein said mobile unit transmits, to said radio base station, information by which its position can be estimated.

3. A system according to claim 2, wherein said radio base station registers the position of said mobile unit on the basis of information transmitted from said mobile unit.

4. A system according to claim 1, further comprising a higher rank station which connects said plurality of radio base stations to each other, said radio base stations reporting the estimated shapes of the cells/sectors to said higher rank station.

5. A system according to claim 2, further comprising a higher rank station which connects said plurality of radio base stations to each other, said radio base stations reporting the estimated shapes of the cells/sectors to said higher rank station.

6. A system according to claim 3, further comprising a higher rank station which connects said plurality of radio base stations to each other, said radio base stations reporting the estimated shapes of the cells/sectors to said higher rank station.

7. A system according to claim 4, wherein said radio base station includes a hysteresis width in the shape of the cell/sector.

8. A system according to claim 5, wherein said radio base station includes a hysteresis width in the shape of the cell/sector.

9. A system according to claim 6, wherein said radio base station includes a hysteresis width in the shape of the cell/sector.

10. A system according to claim 2, wherein said radio base station estimates a shape of a cell/sector formed by said radio base station on the basis of a code determined for each of the sectors, which is transmitted from said mobile unit, and a reception level of the code.

11. A system according to claim 5, wherein said radio base station estimates a shape of a cell/sector formed by said radio base station on the basis of a code determined for each of the sectors, which is transmitted from said mobile unit, and a reception level of the code.

12. A system according to claim 8, wherein said radio base station estimates a shape of a cell/sector formed by said radio base station on the basis of a code determined for each of the sectors, which is transmitted from said mobile unit, and a reception level of the code.

13. A system according to claim 2, wherein said radio base station estimates a shape of a cell/sector formed by said radio base station on the basis of a transmission attenuation amount of a pilot channel in said mobile unit which is transmitted from said mobile unit.

14. A system according to claim 5, wherein said radio base station estimates a shape of a cell/sector formed by said radio base station on the basis of a transmission attenuation amount of a pilot channel in said mobile unit which is transmitted from said mobile unit.

15. A system according to claim 8, wherein said radio base station estimates a shape of a cell/sector formed by said radio base station on the basis of a transmission attenuation amount of a pilot channel in said mobile unit which is transmitted from said mobile unit.

16. A system according to claim 2, wherein said mobile unit estimates a position of said mobile unit on the basis of power control information transmitted from said radio base station, and transmits the position information to said radio base station, and said radio base station estimates a shape of a cell/sector formed by said radio base station on the basis of position information transmitted from said mobile unit.

17. A system according to claim 5, wherein said mobile unit estimates a position of said mobile unit on the basis of power control information transmitted from said radio base station, and transmits the position information to said radio base station, and said radio base station estimates a shape of a cell/sector formed by said radio base station on the basis of position information transmitted from said mobile unit.

18. A system according to claim 8, wherein said mobile unit estimates a position of said mobile unit on the basis of power control information transmitted from said radio base station, and transmits the position information to said radio base station, and said radio base station estimates a shape of a cell/sector formed by said radio base station on the basis of position information transmitted from said mobile unit.

19. A system according to claim 4, wherein said radio base station acquires a shape of a cell/sector reported to said higher rank station, and provides the acquired shape of the cell/sector to said mobile unit.

20. A system according to claim 5, wherein said radio base station acquires a shape of a cell/sector reported to said higher rank station, and provides the acquired shape of the cell/sector to said mobile unit.

21. A system according to claim 6, wherein said radio base station acquires a shape of a cell/sector reported to said higher rank station, and provides the acquired shape of the cell/sector to said mobile unit.

22. A system according to claim 4, wherein said mobile unit determines a frequency of processing to be performed when said mobile unit moves between cells/sectors on the basis of the shapes of the cells/sectors provided from said radio base station.

23. A system according to claim 5, wherein said mobile unit determines a frequency of processing to be performed when said mobile unit moves between cells/sectors on the basis of the shapes of the cells/sectors provided from said radio base station.

24. A system according to claim 6, wherein said mobile unit determines a frequency of processing to be performed when said mobile unit moves between cells/sectors on the basis of the shapes of the cells/sectors provided from said radio base station.

25. A system according to claim 4, wherein said mobile unit decreases a time and cycle for processing to be performed when said mobile unit moves between cells/sectors on the basis of the shapes of the cells/sectors provided from said radio base station.

26. A system according to claim 5, wherein said mobile unit decreases a time and cycle for processing to be performed when said mobile unit moves between cells/sectors on the basis of the shapes of the cells/sectors provided from said radio base station.

27. A system according to claim 6, wherein said mobile unit decreases a time and cycle for processing to be performed when said mobile unit moves between cells/sectors on the basis of the shapes of the cells/sectors provided from said radio base station.

28. A system according to claim 4, wherein said mobile unit decreases a time and cycle for processing to be performed when said mobile unit moves between cells/sectors, when determining that said mobile unit is moving at a constant velocity.

29. A system according to claim 5, wherein said mobile unit decreases a time and cycle for processing to be performed when said mobile unit moves between cells/sectors, when determining that said mobile unit is moving at a constant velocity.

30. A system according to claim 6, wherein said mobile unit decreases a time and cycle for processing to be performed when said mobile unit moves between cells/sectors, when determining that said mobile unit is moving at a constant velocity.

31. A system according to claim 19, wherein said mobile unit provides a shape of a cell/sector, provided from said radio base station, to another mobile unit.

32. A system according to claim 22, wherein said mobile unit provides a shape of a cell/sector, provided from said radio base station, to another mobile unit.

33. A system according to claim 25, wherein said mobile unit provides a shape of a cell/sector, provided from said radio base station, to another mobile unit.

34. A system according to claim 28, wherein said mobile unit provides a shape of a cell/sector, provided from said radio base station, to another mobile unit.

35. A system according to claim 7, wherein the hysteresis width is variable.

36. A system according to claim 8, wherein the hysteresis width is variable.

37. A system according to claim 9, wherein the hysteresis width is variable.

38. A system according to claim 35, wherein the variable hysteresis width is determined from variable data based on a season, temperature, or time and invariable data including topographical data.

39. A system according to claim 36, wherein the variable hysteresis width is determined from variable data based on a season, temperature, or time and invariable data including topographical data.

40. A system according to claim 37, wherein the variable hysteresis width is determined from variable data based on a season, temperature, or time and invariable data including topographical data.

41. A system according to claim 38, wherein the invariable data is determined while including special information indicating that said mobile unit is located in a building or underground.

42. A system according to claim 39, wherein the invariable data is determined while including special information indicating that said mobile unit is located in a building or underground.

43. A system according to claim 39, wherein the invariable data is determined while including special information indicating that said mobile unit is located in a building or underground.

44. A system according to claim 7, wherein said radio base station increases the hysteresis width under a condition in which fading tends to occur.

45. A system according to claim 8, wherein said radio base station increases the hysteresis width under a condition in which fading tends to occur.

46. A system according to claim 9, wherein said radio base station increases the hysteresis width under a condition in which fading tends to occur.