Wireless communications apparatus

• US 6,697,642 B1
• Filed: 07/19/2000
• Issued: 02/24/2004
• Est. Priority Date: 07/19/2000
• Status: Active Grant

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Thomas, David R.
• Primary Examiner(s): Tran, Sinh
• Assistant Examiner(s): Nguyen, David Q
• Application Number:
  US09/619,325
• Time in Patent Office: 1,315 Days
• Field of Search: 370/337, 370/347, 455/522, 455/574, 455/419, 455/90.1, 455/25, 342/374
• US Class Current: 455/562.1
• CPC Class Codes: H01Q 3/2605 Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity
• CPC Class Codes: H04L 1/0014 by adapting the source coding

Abstract

Apparatus for a wireless communication network, comprises: a directional beam antenna, an antenna controller for directing said directional beam antenna in an optimum signal quality beam direction, and coding means operable at two or more coding rates, to switch between said rates responsive to said controller changing said antenna beam direction.

Claims

1. Apparatus for a wireless communications network, comprising:

an antenna system capable of both omnidirectional and directional operation;

an antenna controller for directing said antenna system to operate with omnidirectional operation and, in response to said onmidirectional operation, directing said antenna system to operate in an optimum signal quality direction; and

coding means operable at two or more coding rates, and responsive to said antenna controller initiating a change in a direction of said antenna system to switch between said two or more coding rate.

2. Apparatus for a wireless communications network, the apparatus comprising:

an antenna system capable of both omnidirectional and directional operation;

an antenna controller for directing said antenna system to operate with omnidirectional operation and, in response to said onmidirectional operation, directing said antenna system to operate in an optimum signal quality direction;

means for determining a period of inactivity for said apparatus;

means for determining signal quality of a signal received during said period of inactivity; and

coding means operable at two or more coding rates and responsive to a determined signal quality to switch between said two or more coding rates.

3. Apparatus according to claim 2, further comprising:

a directional beam antenna; and

an antenna controller for directing said directional beam antenna in an optimum signal quality direction in accordance with said determined signal quality, said coding means responsive to said antenna controller initiating a change in said antenna beam direction to switch between said coding rates.

4. Apparatus according to claim 3, said signal received during said period of inactivity comprising a broadcast signal.

5. Apparatus according to claim 4, operable for a cellular radio communications system, said broadcast signal comprising a signal from a base station with which said apparatus is in primary communication.

6. Apparatus according to claim 4, operable for a cellular radio communications system, said broadcast signal comprising a signal from any one of one or more base stations for cells adjacent the cell defined by said base station with which said radio communication system is in primary communication.

7. Apparatus according to claim 2, wherein said period of inactivity comprises a period determined as being designated for the transmission and/or reception of redundant information.

8. Apparatus according to claim 2, operable for speech communication, said period of inactivity comprising non-active segments during transmission and/or reception of silence identity (SID) information.

9. Apparatus according to claim 8, said non-active segments comprising an empty frame and/or part thereof during transmission of SID frames.

10. Apparatus according to claim 2, operable to transmit data, said period of inactivity comprising a period subsequent to an end of data signal transmitted and/or received by a radio apparatus.

11. Apparatus according to claim 2, wherein said coding means is a speech coder.

12. Apparatus according to claim 11, said coding means being operable to switch to higher rate coding responsive to said antenna controller initiating directing said antenna beam towards said optimum signal quality direction.

13. Apparatus according to claim 11, operable to communicate a request to second wireless communications apparatus in communication with the said apparatus to utilize said higher rate coding responsive to said antenna controller initiating directing said antenna beam towards said optimum signal quality direction.

14. Apparatus according to claim 11, said coding means operable to switch to a higher rate coding mode responsive to a rate switch request communicated thereto from a second wireless communications apparatus.

15. Apparatus according to claim 11, said coding means operable to utilise a coding rate corresponding to a coding rate utilize by a second wireless communication apparatus in communication with the said apparatus.

16. Apparatus according to claim 11, further comprising motion sensing means, said coding means responsive to a signal from said motion sensing means indicative of motion of the said apparatus to inhibit said coding means switching or requesting switching of coding rates.

17. Apparatus according to claim 11, further comprising an orientation sensitive sensing means, said coding means responsive to a signal from said sensing means indicative of a change of orientation of the said apparatus to inhibit said coding means switching or requesting switching of coding rate.

18. Apparatus according to claim 16, said coding means responsive to a signal from said sensing means indicative of a sudden movement or change of orientation.

19. Apparatus according to claim 16, responsive to a signal from said sensing means indicative of said apparatus being stationary to switch or request switching between non-adjacent coding rates.

20. Apparatus for a wireless communication network, comprising:

an antenna system capable of both omnidirectional and directional operation;

an antenna controller for directing said antenna system to operate with omnidirectional operation and, in response to said onmidirectional operation, directing said antenna system to operate in an optimum signal quality direction;

coding means operable at two or more coding rates and responsive to control signals to switch between said two or more coding rates; and

a motion sensing means;

said coding means responsive to a signal from said motion sensing means indicative of a change of orientation of said apparatus to inhibit switching of said coding means between said two or more rates.

21. Apparatus for a wireless communication network, comprising:

an antenna system capable of both omnidirectional and directional operation;

an antenna controller for directing said antenna system to operate with omnidirectional operation and, in response to said onmidirectional operation, directing said antenna system to operate in an optimum signal quality direction;

coding means operable at two or more coding rates and responsive to control signals to request a transmitter in communication with said apparatus to switch between one of two or more coding rates; and

an orientation sensitive sensor;

said coding means responsive to a signal from said orientation sensitive senor indicative of a change of orientation of said apparatus to inhibit said request to said transmitter.

22. Apparatus for a wireless communication network, comprising:

an antenna system capable of both omnidirectional and directional operation;

an antenna controller for directing said antenna system to operate with omnidirectional operation and, in response to said onmidirectional operation, directing said antenna system to operate in an optimum signal quality direction;

coding means operable at two or more coding rates and responsive to control signals to switch between said two or more coding rates; and

motion sensing means;

said coding means responsive to a signal from said motion sensing means indicative of said apparatus being stationary to switch or request switching between non-adjacent coding rates.

23. A method for operating wireless apparatus having a directional beam antenna in a wireless communications network, the method comprising:

providing an antenna system capable of both omnidirectional and directional operation;

providing an antenna controller for directing said antenna system to operate with omnidirectional operation and, in response to said onmidirectional operation, directing said antenna system to operate in an optimum signal quality direction;

determining signal quality and initiating a change in antenna beam direction in accordance with said signal quality; and

switching between two or more coding rates for communications by said wireless apparatus responsive to said initiating a change in said antenna beam width.

25. A method according to claim 23, further comprising directing said directional beam antenna to an optimum beam direction in accordance with said signal quality;

and

switching between said two or more coding rates responsive to initiation of a change in antenna beam direction.

37. A method according to claim 23, further comprising utilising a coding rate utilised by a second wireless apparatus in communication with said wireless apparatus.

38. A method according to claim 23, further including switching between said coding rates in response to sensing movement of said wireless apparatus.

24. A method for operating wireless apparatus, comprising:

providing an antenna system capable of both omnidirectional and directional operation;

providing an antenna controller for directing said antenna system to operate with omnidirectional operation and, in response to said onmidirectional operation, directing said antenna system to operate in an optimum signal quality direction;

determining a period of inactivity for said apparatus;

determining signal quality of a signal received during said period of inactivity; and

switching between two or more coding rates for communications by said wireless apparatus responsive to a determined signal quality.

26. A method according to claim 24, said signal comprising a broadcast signal.

27. A method according to claim 26, operable for a cellular radio communications system, said broadcast signal comprising a signal from a base station with which said radio apparatus is in primary communication.

28. A method according to claim 26, operable for a cellular radio communications system, said broadcast signal comprising a signal from any one of one or more base stations for cells adjacent the cell defined by said base station with which said radio apparatus is in primary communication.

29. A method according to claim 28, further comprising determining and storing optimum beam directions for said signal from any one of one or more base stations, for utilisation during a subsequent hand-over operation to a one of said one or more base stations.

30. A method according to claim 24, further comprising determining a period designated for transmission and/or reception of redundant information for said radio apparatus.

31. A method according to claim 24, for speech communications, further comprising determining a non-active segment during transmission and/or reception of silence identity (SID) information.

32. A method according to claim 31, said non-active segment comprising empty frames and/or part thereof during transmission and/or reception of SID frames.

33. A method according to claim 24, for data communications, further comprising determining an end of data signal transmitted and/or received by said radio apparatus.

34. A method according to claim 24, further comprising switching to a higher rate speech coding for said directional beam antenna being directed in said optimum signal quality beam direction.

35. A method according to claim 34, further comprising requesting a second wireless apparatus in communication with said wireless apparatus to utilize said higher rate speech coding for said directional beam antenna being directed in said optimum signal quality beam direction.

36. A method according to claim 34, further comprising switching to said higher rate speech coding mode in response to receiving a rate switch request from a second wireless apparatus in communication with said wireless apparatus.