Wireless communication technique comprising multiple beacons in each communications superframe

• US 8,306,002 B2
• Filed: 12/28/2004
• Issued: 11/06/2012
• Est. Priority Date: 04/05/2004
• Status: Active Grant

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Ho, Jin-Meng
• Primary Examiner(s): Patel, Ajit
• Application Number:
  US11/023,690
• Publication Number:
  US 20050226203A1
• Time in Patent Office: 2,870 Days
• Field of Search: 370/254, 370/338, 370445-448, 370/255, 370/256, 370/257, 370/258, 370/310, 370/310.1, 370/310.2, 370/311, 370/312, 370/328, 370/329, 370/346, 370/349, 370/351, 370/352, 370/396, 370/398, 370/395.4, 370/395.41, 370/395.42, 370/395.5, 370/400, 370/401, 370/406, 370/407, 370/408, 370/409, 370/432, 370/449, 370/460, 370/461, 370/462, 370/469, 370/470, 370/471, 370/472, 370/473, 370/474, 370/475, 370/476
• US Class Current: 370/338
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00

Abstract

In accordance with various embodiments, multiple beacons are transmitted in each communication superframe within a wireless network. In accordance with one embodiment, for example, a method is disclosed that comprises transmitting a first beacon in a superframe and transmitting a second beacon in the superframe. The first beacon comprises wireless medium access information that specifies nodes that are to communicate across a wireless medium in that superframe. The second beacon also comprises wireless medium access information. The first and second beacons further specify a list of nodes that are to transmit the first beacons in subsequent superframes upon failure to receive the first beacon for a corresponding predetermined number of superframes.

Claims

1. A method, comprising:

a wireless transceiver of a primary node from a plurality of nodes transmitting a first beacon in a superframe, said first beacon comprising wireless medium access information that specifies the plurality of nodes that are to communicate across a wireless medium in said superframe, said wireless medium access information further specifying a first list of nodes that are to transmit first beacons in subsequent superframes upon missing said first beacons for a predetermined number of superframes; and

one or more secondary nodes transmitting a second beacon in said superframe, said second beacon also comprising said wireless medium access information.

2. The method of claim 1 wherein said wireless medium access information further comprises a list of nodes that are to transmit said second beacon in successive superframes and an order at which such nodes are to take turns to transmit said second beacons.

3. The method of claim 1 further comprising one or more nodes other than the primary and secondary nodes transmitting a third beacon in said superframe, said third beacon also comprising said wireless medium access information.

4. A method, comprising:

a wireless transceiver of one or more secondary nodes receiving a first beacon in a superframe, said first beacon comprising wireless medium access information that specifies a plurality of nodes that are to communicate across a wireless medium in said superframe, said wireless medium access information further specifying a first list of nodes that are to transmit first beacons in subsequent superframes upon missing said first beacons for a predetermined number of superframes; and

transmitting a second beacon in said superframe, said second beacon also comprising said wireless medium access information.

5. The method of claim 4 further comprising transmitting said first beacon.

6. The method of claim 4 wherein said wireless medium access information further comprises a second list of nodes that are to transmit said second beacons in successive superframes and an order at which such nodes are to turn turns to transmit said second beacons.

7. The method of claim 4 further comprising transmitting a third beacon in said superframe, said third beacon also comprising said wireless medium access information.

8. A method, comprising:

a wireless transceiver of a primary node transmitting a first beacon in a superframe, said first beacon comprising wireless medium access information that specifies a plurality of nodes that are to communicate across a wireless medium in said superframe, said wireless medium access information further specifying a first list of nodes that are to transmit first beacons in subsequent superframes upon missing said first beacons for a predetermined number of superframes; and

receiving a second beacon in said superframe, said second beacon also comprising said wireless medium access information.

9. The method of claim 8 wherein said wireless medium access information further comprises a second list of nodes that are to transmit said second beacons in successive superframes and an order at which such nodes are to take turns to transmit said second beacons.

10. A node operable in a wireless network, comprising:

host logic; and

a wireless transceiver coupled to said host logic, said wireless transceiver receives a first beacon within a superframe, said first beacon comprising wireless medium access information pertaining to said superframe, and said wireless transceiver transmits a second beacon within said superframe, said second beacon comprises wireless medium access information, wherein the wireless medium access information in the first and second beacons is identical, wherein said wireless transceiver waits for its turn to transmit the second beacon in a successive superframe.

11. The node of claim 10 wherein said wireless medium access information further comprises a second list of nodes that are to transmit said second beacons in successive superframes and an order at which such nodes are to take turns to transmit said second beacons.

12. A system, comprising:

a plurality of nodes, including a primary node and one or more secondary nodes,

wherein said primary node transmits in a superframe a first beacon comprising wireless medium access information specifying a plurality of nodes that are to access the wireless medium in said superframe, and wherein a node of said one or more secondary nodes transmits in said superframe a secondary beacon also

comprising said wireless medium access information, said wireless medium access information further specifying a first list of nodes that are to transmit first beacons in subsequent superframes upon missing said first beasons for a predetermined number of superframes.

13. The system of claim 12 wherein said wireless medium access information further comprises a second list of nodes that are to transmit said second beacons in successive superframes and an order at which such nodes are to take turns to transmit said second beacons.