Method of managing time slots in a wireless network through the use of contention groups

• US 20030137993A1
• Filed: 01/22/2003
• Published: 07/24/2003
• Est. Priority Date: 01/22/2002
• Status: Abandoned Application

• Current Assignee: Freescale Semiconductor, Inc. (NXP Semiconductors NV)
• Original Assignee: Freescale Semiconductor, Inc. (NXP Semiconductors NV)
• Inventors: Odman, Knut T.
• Application Number:
  US10/347,824
• Publication Number:
  US 20030137993A1
• Time in Patent Office: Days
• US Class Current: 370/468
• CPC Class Codes: H04L 67/04 specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
• CPC Class Codes: H04L 69/28 Timers or timing mechanisms used in protocols
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 4/08 User group management
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 74/02 Hybrid access
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A method is provided for passing management frames between a network coordinator and a plurality of devices during a plurality of repeating superframes. The superframes are divided into repeating groups of consecutive superframes that form a superframe cycle. Each superframe has a set number of management time slots in it, which number can change. This creates a number of unique management time slots in each superframe cycle based on the number of superframes per cycle and the number of management time slots per superframe. The devices are assigned to a number of contention groups equal to the total number of management time slots in a superframe cycle. Each contention group is assigned a unique management time slot, and each device can only send management requests to the coordinator during the unique management time slot assigned to its contention group. Contention groups may have zero or one device in them.

Claims

1. A method of passing management frames between a coordinator and a plurality of devices during a plurality of repeated superframes, comprising:

dividing the plurality of superframes into repeating groups of L consecutive superframes;

forming M management time slots in each of the L consecutive superframes, such that N unique management time slots are created in the L consecutive superframes, where N is equal to L times M;

dividing the plurality of devices into N contention groups;

assigning each of the N contention groups to one of the N unique management time slots;

allowing an individual device from the plurality of devices to send management requests to a network coordinator only during the unique management time slot to which the contention group that the individual device is a member of is assigned,

wherein L and M are integers greater than 0, N is an integer greater than 1.

2. A method of passing management frames between a coordinator and a plurality of devices during a plurality of repeated superframes, as recited in claim 1, wherein each of the N contention groups has no more than one more of the plurality of devices assigned to it than any other of the N contention groups.

3. A method of passing management frames between a coordinator and a plurality of devices during a plurality of repeated superframes, as recited in claim 1, wherein L is between 1 and 16.

4. A method of passing management frames between a coordinator and a plurality of devices during a plurality of repeated superframes, as recited in claim 1, wherein M is between 1 and 8.

5. A method of passing management frames between a coordinator and a plurality of devices during a plurality of repeated superframes, as recited in claim 1, wherein N is between 1 and 64.

6. A method of passing management frames between a coordinator and a plurality of devices during a plurality of repeated superframes, as recited in claim 1, wherein the management time frames are uplink management time frames, used for passing signals from one of the plurality of devices to the network coordinator.

7. A method of passing management frames between a coordinator and a plurality of devices during a plurality of repeated superframes, as recited in claim 1, wherein each of the L repeated superframes further comprises downlink management time slots, used for passing signals from the network coordinator to each of the plurality of devices.