Method of operating a media access controller having pseudo-static guaranteed time slots

• US 7,593,422 B2
• Filed: 08/13/2003
• Issued: 09/22/2009
• Est. Priority Date: 01/03/2002
• Status: Expired due to Fees

• Current Assignee: North Star Innovations Inc. (Wi-LAN Inc.)
• Original Assignee: Freescale Semiconductor, Inc. (NXP Semiconductors NV)
• Inventors: Shvodian, William M.
• Primary Examiner(s): Ngo, Ricky
• Assistant Examiner(s): Mui, Gary
• Application Number:
  US10/639,778
• Publication Number:
  US 20040114563A1
• Time in Patent Office: 2,232 Days
• Field of Search: 370/338, 370/321, 370/328, 370/329, 370/336, 370/442, 370/445, 370/447, 370/314, 455/41.2, 455/11.1
• US Class Current: 370/442
• CPC Class Codes: H04B 7/2612 Arrangements for wireless medium access control, e.g. by allocating physical layer transmission capacity H04B7/2615 - H04B7/2643 take precedence; provision for broadband connection H04Q11/0478
• CPC Class Codes: H04B 7/2659 for data rate control
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02

Abstract

A transmitter and a receiver are both initially assigned a starting time slot from a plurality of active time slots in a superframe structure. A controller sends instructions to the transmitter and receiver during a first superframe. These instruct the transmitter to transmit signals during an ending time slot in one or more unused time intervals in the superframes. If the transmitter receives these instructions, it immediately begins transmitting in the ending time slot. If the receiver receives the instructions, it listens for the signals during both the starting active time slot and the ending active time slot for a set number of consecutive superframes after the first superframe. If the receiver does not receive the instructions, it listens for the signals during the entire superframe until it hears instructions in a new superframe. If the transmitter misses more than the set number of superframes, it stops transmitting.

Claims

1. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in superframes having a plurality of active time slots and one or more unassigned time intervals, the transmitter and the receiver both being initially assigned to a staffing time slot chosen from the plurality of active time slots, comprising:

sending instructions from a controller to both the transmitter and the receiver during a first superframe, the instructions instructing the transmitter to transmit signals during an ending time slot formed in the one or more unassigned time intervals;

receiving the instructions at the receiver during the first superframe; and

listening for the signals at the receiver during both the staffing active time slot and the ending time slot during n consecutive superframes after the first superframe,

wherein n is an integer greater than zero.

2. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in a superframe having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 1, further comprising transmitting the signals from the transmitter during the staffing time slot during at least one of the n consecutive superframes.

3. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in a superframe having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 2, further comprising:

receiving the instructions at the transmitter during one of the n consecutive superframes; and

transmitting the signals from the transmitter during the ending time slot in at least one of the n consecutive superframes.

4. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in a superframe having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 1, further comprising:

receiving the instructions at the transmitter during the first superframe; and

transmitting the signals from the transmitter during the ending time slot in each of the n consecutive superframes.

5. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in a superframe having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 1, further comprising listening for the signals at the receiver during the ending active time slot during all later superframes after the n consecutive superframes.

6. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in a superframe having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 1, wherein the instructions are placed inside of a beacon within the first superframe.

7. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in a superframe having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 1, further comprising sending the instructions from the controller to both the transmitter and the receiver in each of the n consecutive superframes.

8. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in a superframe having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 7, wherein the instructions are placed inside of n respective beacons within the n consecutive superframes.

9. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in a superframe having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 1, wherein the transmitter and receiver are ultrawide bandwidth devices.

10. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in a superframe having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 1, wherein n is between 1 and 8.

11. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in a superframe having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 1, wherein n is 4.

12. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in superframes having a plurality of active time slots and one or more unassigned time intervals, the transmitter and the receiver both being initially assigned to a staffing time slot chosen from the plurality of active time slots, comprising:

sending instructions from a controller to both the transmitter and the receiver during a first superframe, the instructions instructing the transmitter to transmit signals during an ending time slot formed in the one or more unassigned time intervals;

receiving the instructions at the transmitter during the first superframe;

transmitting the signals from the transmitter during the ending time slot in n consecutive superframes after the first superframe; and

listening for the signals at the receiver during all of the active time slots and unassigned time intervals during at least one of the n consecutive superframes,

wherein n is an integer greater than zero.

13. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in a superframe having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 12, further comprising:

receiving the instructions at the receiver during one of the n consecutive superframes; and

listening for the signals at the receiver during both the starting active time slot and the ending active time slot during at least one of the n consecutive superframes after the first superframe.

14. A method of controlling a transmitter and a receiver to adjust transmitting and receiving times in a superframe having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 12, wherein the transmitter and receiver are ultrawide bandwidth devices.

15. A method of controlling a receiver in a wireless network using superframes having a plurality of active time slots and one or more unassigned time intervals, the receiver being initially assigned to a staffing time slot chosen from the plurality of active time slots, comprising:

receiving instructions from a controller at the receiver in a first superframe, the instructions instructing the receiver to receive signals during an ending time slot formed in the one or more unassigned time intervals; and

listening for the signals at the receiver during both the staffing time slot and the ending time slot during n consecutive superframes after the first superframe,

wherein n is an integer greater than zero.

16. A method of controlling a receiver in a wireless network using superframes having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 15, wherein n is between 1 and 8.

17. A method of controlling a receiver in a wireless network using superframes having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 15, wherein n is 4.

18. A method of controlling a transmitter in a wireless network using superframes having a plurality of active time slots and one or more unassigned time intervals, the transmitter being initially assigned to a staffing time slot chosen from the plurality of active time slots, comprising:

determining whether the transmitter received instructions from a controller in a first superframe, the instructions instructing the transmitter to transmit signals during an ending time slot formed in one of the one or more unassigned time intervals;

transmitting the signals during the ending time slot if the transmitter did receive the instructions in the first superframe; and

transmitting the signals during the staffing time slot if the transmitter did not receive the instructions in the first superframe, and if the transmitter has not missed receiving previous instructions in m consecutive immediately previous superframes,

wherein m is an integer greater than or equal to 3.

19. A method of controlling a transmitter in a wireless network using superframes having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 18, further comprising entering an error mode if the transmitter did not receive the instructions in the first superframe, and if the transmitter has missed receiving previous instructions in m consecutive immediately previous superframes.

20. A method of controlling a transmitter in a wireless network using superframes having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 18, wherein m is between 3 and 7.

21. A method of controlling a transmitter in a wireless network using superframes having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 18, wherein m is 3.

22. A method of controlling a transmitter in a wireless network using superframes having a plurality of active time slots and one or more unassigned time intervals, as recited in claim 18, wherein the ending time slot is formed entirely in the one of the one or more unassigned time intervals.