Method and apparatus for controlling communications of data from multiple base stations to a mobile station in a communication system

• US 20030129989A1
• Filed: 10/18/2002
• Published: 07/10/2003
• Est. Priority Date: 01/08/2002
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Tiedemann, Edward G. Jr., Gholmieh, Aziz, Gaal, Peter
• Granted Patent: US 7,711,363 B2
• Time in Patent Office: Days
• US Class Current: 455/452.1
• CPC Class Codes: H04B 2201/70703 using multiple or variable rates
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04J 13/0048 Walsh
• CPC Class Codes: H04J 13/18 Allocation of orthogonal codes
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/0066 Parallel concatenated codes
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters

Abstract

An apparatus and method provides for controlling communications from multiple base stations to a mobile station in a communication system. A mobile station transmitter transmits from the mobile station channel quality indicator data of a first base station. The data is covered with Walsh code assigned to the first base station. A base station receiver receives the transmission of the channel quality indicator data of the first base station. The mobile station transmitter punctures the transmission of the channel quality indicator data of the first base station with null channel quality indicator data, and covers the null channel quality data with Walsh code assigned to a second base station of the multiple base stations to indicate a desire to switch a source of transmission of traffic data from the first base station to the second base station.

Claims

1. A method for controlling communications from multiple base stations to a mobile station in a communication system, comprising:

transmitting channel quality indicator data of a first base station of said multiple base stations on a reverse link channel quality indicator channel, covered with Walsh code assigned to said first base station;

puncturing said transmitting channel quality indicator data of said first base station with null channel quality indicator data, and covering said null channel quality data with Walsh code assigned to a second base station of said multiple base stations;

transmitting said punctured transmission to said first base station to indicate a desire to switch a source of transmission of traffic data, for said mobile station, from said first base station to said second base station.

2. The method as recited in claim 1 further comprising:

switching said source of transmission of traffic data from said first base station to said second base station.

3. The method as recited in claim 2 further comprising:

receiving a traffic data transmission from said second base station.

4. The method as recited in claim 1 further comprising:

receiving a traffic data transmission from said first base station.

5. The method as recited in claim 1 wherein said puncturing is for a duration of at least one time frame consisting of a plurality of time slots.

6. The method as recited in claim 5 wherein said puncturing includes using at least one of said plurality of time slots.

7. The method as recited in claim 1 further comprising:

selecting said second base station for said source of transmission of traffic data.

8. A method for controlling communications from multiple base stations to a mobile station in a communication system, comprising:

receiving, at a first base station of said multiple base stations, from said mobile station channel quality indicator data of said first base station on a reverse link channel quality indicator channel, covered with Walsh code assigned to said first base station;

receiving punctured transmission of said channel quality indicator data of said first base station with null channel quality indicator data, and covered said null channel quality data with Walsh code assigned to a second base station of said multiple base stations to indicate a desire to switch a source of transmission of traffic data, for said mobile station, from said first base station to said second base station.

9. The method as recited in claim 8 further comprising:

switching said source of transmission of traffic data from said first base station to said second base station.

10. The method as recited in claim 9 further comprising:

transmitting traffic data from said second base station.

11. The method as recited in claim 8 further comprising:

transmitting traffic data from said first base station.

12. The method as recited in claim 8 wherein said punctured transmission is for a duration of at least one time frame consisting of a plurality of time slots.

13. The method as recited in claim 12 wherein said punctured transmission includes using at least one of said plurality of time slots.

14. The method as recited in claim 8 further comprising:

selecting said second base station for said source of transmission of traffic data.

15. A method for controlling communications from multiple base stations to a mobile station in a communication system, comprising:

transmitting, from said mobile station, channel quality indicator data of a first base station of said multiple base stations on a reverse link channel quality indicator channel, covered with Walsh code assigned to said first base station;

receiving, at said first base station, from said mobile station, said transmission of said channel quality indicator data of said first base station on said reverse link channel quality indicator channel, covered with Walsh code assigned to said first base station;

puncturing said transmitting channel quality indicator data of said first base station with null channel quality indicator data, and covering said null channel quality data with Walsh code assigned to a second base station of said multiple base stations;

transmitting, from said mobile station, said punctured transmission to said first base station to indicate a desire to switch a source of transmission of traffic data from said first base station to said second base station;

receiving said punctured transmission of said channel quality indicator data of said first base station with null channel quality indicator data, and covered said null channel quality data with Walsh code assigned to said second base station of said multiple base stations;

switching said source of transmission of traffic data from said first base station to said second base station.

16. The method as recited in claim 15 further comprising:

receiving a traffic data transmission from said first base station.

17. The method as recited in claim 15 further comprising:

receiving a traffic data transmission from said second base station.

18. The method as recited in claim 15 wherein said punctured transmission is for a duration of at least one time frame consisting of a plurality of time slots.

19. The method as recited in claim 18 wherein said punctured transmission includes using at least one of said plurality of time slots.

20. The method as recited in claim 15 further comprising:

selecting said second base station for said source of transmission of traffic data.

21. An apparatus for controlling communications from multiple base stations to a mobile station in a communication system, comprising:

a transmitter for transmitting channel quality indicator data of a first base station of said multiple base stations on a reverse link channel quality indicator channel, covered with Walsh code assigned to said first base station, for puncturing said transmitting channel quality indicator data of said first base station with null channel quality indicator data, and covering said null channel quality data with Walsh code assigned to a second base station of said multiple base stations, for transmitting said punctured transmission to said first base station to indicate a desire to switch a source of transmission of traffic data, for said mobile station, from said first base station to said second base station.

22. The apparatus as recited in claim 21 further comprising:

a controller for switching said source of transmission of traffic data from said first base station to said second base station.

23. The apparatus as recited in claim 21 further comprising:

a receiver for receiving a traffic data transmission from said second base station.

24. The apparatus as recited in claim 21 further comprising:

a receiver for receiving a traffic data transmission from said first base station.

25. The apparatus as recited in claim 21 wherein said puncturing is for a duration of at least one time frame consisting of a plurality of time slots.

26. The apparatus as recited in claim 25 wherein said puncturing includes using at least one of said plurality of time slots.

27. The apparatus as recited in claim 21 further comprising:

means for selecting said second base station for said source of transmission of traffic data.

33. The apparatus as recited in claim 22 wherein said punctured transmission includes using at least one of said plurality of time slots.

28. An apparatus for controlling communications from multiple base stations to a mobile station in a communication system, comprising:

a receiver for receiving, at a first base station of said multiple base stations, from said mobile station channel quality indicator data of said first base station on a reverse link channel quality indicator channel, covered with Walsh code assigned to said first base station, for receiving punctured transmission of said channel quality indicator data of said first base station with null channel quality indicator data, and covered said null channel quality data with Walsh code assigned to a second base station of said multiple base stations to indicate a desire to switch a source of transmission of traffic data, for said mobile station, from said first base station to said second base station.

29. The apparatus as recited in claim 28 further comprising:

a controller for switching said source of transmission of traffic data from said first base station to said second base station.

30. The apparatus as recited in claim 29 further comprising:

a transmitter for transmitting traffic data from said second base station.

31. The apparatus as recited in claim 28 further comprising:

a transmitter for transmitting traffic data from said first base station.

32. The apparatus as recited in claim 28 wherein said punctured transmission is for a duration of at least one time frame consisting of a plurality of time slots.

34. The apparatus as recited in claim 28 further comprising:

means for selecting said second base station for said source of transmission of traffic data.

35. An apparatus for controlling communications from multiple base stations to a mobile station in a communication system, comprising:

a mobile station transmitter for transmitting, from said mobile station, channel quality indicator data of a first base station of said multiple base stations on a reverse link channel quality indicator channel, covered with Walsh code assigned to said first base station;

a base station receiver for receiving, at said first base station, from said mobile station, said transmission of said channel quality indicator data of said first base station on said reverse link channel quality indicator channel, covered with Walsh code assigned to said first base station;

said mobile station transmitter further for puncturing said transmitting channel quality indicator data of said first base station with null channel quality indicator data, and covering said null channel quality data with Walsh code assigned to a second base station of said multiple base stations, and for transmitting, from said mobile station, said punctured transmission to said first base station to indicate a desire to switch a source of transmission of traffic data from said first base station to said second base station;

said base station receiver further for receiving said punctured transmission of said channel quality indicator data of said first base station with null channel quality indicator data, and covered said null channel quality data with Walsh code assigned to said second base station of said multiple base stations;

a controller for switching said source of transmission of traffic data from said first base station to said second base station.

36. The apparatus as recited in claim 35 further comprising:

a mobile station receiver for receiving a traffic data transmission from said first base station.

37. The apparatus as recited in claim 35 further comprising:

a mobile station receiver for receiving a traffic data transmission from said second base station.

38. The apparatus as recited in claim 35 wherein said punctured transmission is for a duration of at least one time frame consisting of a plurality of time slots.

39. The apparatus as recited in claim 38 wherein said punctured transmission includes using at least one of said plurality of time slots.

40. The apparatus as recited in claim 35 further comprising:

means for selecting said second base station for said source of transmission of traffic data.