Method of using sub-rate slots in an ultrawide bandwidth system

• US 20030199272A1
• Filed: 03/11/2003
• Published: 10/23/2003
• Est. Priority Date: 03/11/2002
• Status: Active Grant

• Current Assignee: North Star Innovations Inc. (Wi-LAN Inc.)
• Original Assignee: Freescale Semiconductor, Inc. (NXP Semiconductors NV)
• Inventors: Shvodian, William M., Odman, Knut T., Montano, Sergio T.
• Granted Patent: US 7,127,254 B2
• Time in Patent Office: Days
• US Class Current: 455/434
• CPC Class Codes: H04J 3/1647 Subrate or multislot multiplexing
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02

Abstract

A method is provided to pass information in a wireless network. The available channel time in the network is first divided into a plurality of sequential superframes. Some devices may need to transmit during every superframe, but others will only need to transmit during a fraction of the superframes. These devices are assigned sub-rate time slots in the superframes at sub-rates that must be a power of two. In other words, they can only be assigned sub-rate time slots every second superframe, every fourth superframe, every eighth superframe, etc. This allows the sub-rate time slots to be spread more evenly throughout the plurality of sequential superframes, and minimizes the amount of overlap possible.

Claims

1. A method of passing information in a wireless network, comprising:

dividing an available channel time in the wireless network into a plurality of sequential superframes;

transmitting first signals from a first device only during one out of every K₁ sequential superframes; and

transmitting second signals from a second device only during one out of every K₂ sequential superframes, wherein K₁ and K₂ are each chosen from the set consisting of powers of two.

2. A method of passing information in a wireless network, as recited in claim 1, wherein the first and the second devices do not ever transmit signals during the same superframe.

3. A method of passing information in a wireless network, as recited in claim 1, wherein each superframe has a limited number of sub-rate time slots, and wherein the first and second signals are transmitted in the sub-rate time slots.

4. A method of passing information in a wireless network, comprising:

dividing an available channel time in the wireless network into a plurality of sequential superframes; and

transmitting first through Nth signals from first through Nth devices, respectively, only during one out of every K₁ to K_N sequential superframes, respectively, wherein K₁ to K_N are each integers chosen from the set consisting of powers of two.

5. A method of passing information in a wireless network, as recited in claim 4,

wherein

$\frac{1}{K_1}+\frac{1}{K_2}+\dots$



 

+1KN<

1,

and

wherein no two of the first through Nth devices transmit signals during the same superframe.

6. A method of passing information in a wireless network, as recited in claim 4,

wherein

$\frac{1}{K_1}+\frac{1}{K_2}+\dots$

+1KN<

J,

and

wherein no more than J of the first through Nth devices transmit signals during the same superframe, and

wherein J is an integer greater than 1.

7. A method of passing information in a wireless network, as recited in claim 4, wherein each superframe has a limited number of sub-rate time slots, and wherein the first through N^th signals are transmitted in the sub-rate time slots.