Communication timing control arrangement and method thereof

• US 6,028,849 A
• Filed: 04/18/1997
• Issued: 02/22/2000
• Est. Priority Date: 04/18/1997
• Status: Expired due to Term

• Current Assignee: ST-Ericcson SA (Telefonaktiebolaget LM Ericsson)
• Original Assignee: VLSI Technology, Inc. (Koninklijke Philips N.V.)
• Inventors: Van Der Tuijn, Roland, Niot, Francois
• Primary Examiner(s): Nguyen, Chau
• Assistant Examiner(s): RAO, SEEMA SRINIVAS
• Application Number:
  US08/844,266
• Time in Patent Office: 1,040 Days
• Field of Search: 370/277, 370/280, 370/318, 370/336, 370/337, 370/345, 370/350, 370/509, 370/514, 370/347, 370/311, 455/38.3, 455/343, 455/502, 455/574
• US Class Current: 370/280
• CPC Class Codes: H04B 7/2671 Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
• CPC Class Codes: H04J 3/0602 Systems characterised by the synchronising information used
• CPC Class Codes: H04W 56/0085 detecting a given structure in the signal

Abstract

A radio controller arrangement for controlling communication signal timing in a duplex radio-frequency TDMA radio includes a TDMA timer that generates a receive timing signal and a microprocessor circuit. The microprocessor circuit commands the TDMA timer to activate the radio to receive a signal and converts the signal into packets having synchronization and data fields. The TDMA timer synchronizes a beginning of a data collection operation to the synchronization field and locates the beginning of the data field based on the end of the synchronization field. The TDMA timer collects data from the data field until it detects the end of the data field. The TDMA timer then commands deactivation of the radio. The radio controller arrangement may be incorporated into a communication device or used in connection with a method for controlling communication signal timing.

Claims

1. For use in a duplex radio-frequency TDMA radio having receive signals communicated in contiguously arranged packets, a radio controller arrangement for controlling communication signal timing, comprising:

a TDMA timer generating a receive timing signal;

a radio-frequency receiver; and

a microprocessor circuit including at least one processor and a program instruction set arranged to be accessed and executed by the processor to command the TDMA timer to

activate the radio-frequency receiver,

synchronize a beginning of a data collection operation to a synchronization field of a packet received by the radio-frequency receiver,

determine a beginning of a data field of the received packet as a function of an end of the synchronization field,

collect data from the data field and detect an end of the data field, and

command deactivation of the radio-frequency receiver after detecting the end of the data field.

2. A radio controller arrangement, according to claim 1, further comprising a memory for storing the program instruction set.

3. A radio controller arrangement, according to claim 1, further comprising a memory, configured and arranged to store sets of radio signal level data.

4. A radio controller arrangement, according to claim 3, further comprising a latching arrangement, configured and arranged to store one of the sets of radio signal level data.

5. A radio controller arrangement, according to claim 3, wherein the radio controller arrangement is configured and arranged to generate an output signal as a function of a set of radio signal level data.

6. A radio controller arrangement, according to claim 3, wherein the memory comprises a portion configured and arranged to maintain an idle state on a time slot.

7. A radio controller arrangement, according to claim 6, further comprising a counter, operatively coupled to the portion and configured and arranged to count sets of radio signal level data retrieved from the portion.

8. A communication device, comprising:

a TDMA timing circuit generating a receive timing signal;

a radio-frequency receiver; and

a microprocessor circuit including a microprocessor and a program instruction set arranged to be accessed and executed by the microprocessor to command the TDMA timing circuit to

respond to the received timing signal by activating the radio-frequency receiver,

synchronize a beginning of a data collection operation to a synchronization field of a packet received by the radio-frequency receiver,

determine a beginning of a data field of the received packet as a function of an end of the synchronization field,

collect data from the data field at least until an end of the data field is detected, and

respond to detecting the end of the data field by commanding deactivation of the radio-frequency receiver.

9. A communication device, according to claim 8, further comprising a memory for storing the program instruction set.

10. A communication device, according to claim 8, further comprising a memory, configured and arranged to store sets of radio signal level data.

11. A communication device, according to claim 10, further comprising a latching arrangement, configured and arranged to store one of the sets of radio signal level data.

12. A communication device, according to claim 10, wherein the radio controller arrangement is configured and arranged to generate an output signal as a function of a set of radio signal level data.

13. A communication device, according to claim 10, wherein the memory comprises a portion, configured and arranged to maintain an idle state on a time slot.

14. A communication device, according to claim 13, further comprising a counter, configured and arranged to count sets of radio signal level data retrieved from the portion.

15. For use in a duplex radio-frequency TDMA radio having receive signals communicated in contiguously arranged packets, a method for controlling communication signal timing, the method comprising:

using a TDMA timing circuit to generate receive timing signals;

activating a radio-frequency receiver in response to the receive timing signal;

synchronizing a beginning of a data collection operation of the TDMA timing circuit to a synchronization field of a packet received by the radio-frequency receiver;

using the TDMA timing circuit to determine a beginning of a data field of the received packet as a function of an end of the synchronization field;

using the TDMA timing circuit to collect data from the data field at least until an end of the data field is detected; and

responding to detecting the end of the data field by commanding deactivation of the radio-frequency receiver.

16. A method for controlling communication signal timing, according to claim 15, further comprising storing a program instruction set in a memory.

17. A method for controlling communication signal timing, according to claim 15, further comprising storing sets of radio signal level data in a memory.

18. A method for controlling communication signal timing, according to claim 17, further comprising generating an output signal as a function of a set of radio signal level data.

19. A method for controlling communication signal timing, according to claim 15, further comprising maintaining an idle state on a time slot using a portion of a memory.

20. A method for controlling communication signal timing, according to claim 19, further comprising maintaining a count of sets of data retrieved from the portion of the memory.

21. For use in a duplex radio-frequency TDMA radio having receive signals communicated in contiguously arranged packets, a microprocessor arrangement for controlling communication signal timing, comprising:

at least one processor; and

a program instruction set arranged to be accessed and executed by the processor to command the TDMA timing circuit to

activate the radio-frequency receiver,

synchronize a beginning of a data collection operation to a synchronization field of a packet received by the radio-frequency receiver,

determine a beginning of a data field of the received packet as a function of an end of the synchronization field,

collect data from the data field and detect an end of the data field, and

command deactivation of the radio-frequency receiver after detecting the end of the data field.

22. For use in a duplex radio-frequency TDMA radio having receive signals communicated in contiguously arranged packets, a radio controller arrangement for controlling communication signal timing, comprising:

means for generating receive timing signals;

means for activating a radio-frequency receiver in response to the receive timing signal;

means for synchronizing a beginning of a data collection operation to a synchronization field of a packet received by the radio-frequency receiver;

means for determining a beginning of a data field of the received packet as a function of an end of the synchronization field;

means for collecting data from the data field at least until an end of the data field is detected; and

means for responding to detecting the end of the data field by commanding deactivation of the radio-frequency receiver.

23. For use in a duplex radio-frequency TDMA radio having receive signals communicated in contiguously arranged packets, a radio controller arrangement for controlling communication signal timing, comprising:

a timing signal generator, configured and arranged to generate a receive timing signal;

a receiver activator, configured and arranged to activate a radio-frequency receiver in response to the receive timing signal;

a synchronizer, configured and arranged to synchronize a beginning of a data collection operation of the timing signal generator to a synchronization field of a packet received by the radio-frequency receiver;

a data collector, configured and arranged to

determine a beginning of a data field of the received packet as a function of an end of the synchronization field,

collect data from the data field at least until an end of the data field is detected, and

command deactivation of the radio-frequency receiver after detecting the end of the data field.