Method and apparatus for transmitting information within a communication system

• US 20040160916A1
• Filed: 02/14/2003
• Published: 08/19/2004
• Est. Priority Date: 02/14/2003
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Vukovic, Ivan, Odlyzko, Paul, Freeburg, Thomas A.
• Granted Patent: US 7,269,152 B2
• Time in Patent Office: Days
• US Class Current: 370/332
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0046 Code rate detection or code type detection H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/0075 Transmission of coding parameters to receiver H04L1/0023 takes precedence
• CPC Class Codes: H04W 36/16 Performing reselection for specific purposes
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 84/00 Network topologies

Abstract

A node within a communication system periodically broadcasts its interference status to neighboring nodes within the communication system. Additionally, the node receives an interference status from all neighboring nodes. If communication is desired with a neighboring node, the node accesses the stored table for the particular neighboring node and determines an optimal time for transmission to the neighboring node. This is accomplished by utilizing the table received from the neighboring node and determining the neighboring node'"'"'s optimal times for reception.

Claims

1. A method for transmitting information within a communication system, the communication system comprising a plurality of nodes communicating within a same frequency band, the method comprising the steps of:

monitoring for interference to determine an interference state comprising those time periods when a node can receive communications within the frequency band with little or no interference;

creating a table of the node'"'"'s interference state; and

broadcasting the node'"'"'s interference state to neighboring nodes within the communication system.

2. The method of claim 1 further comprising the steps of:

receiving a second table from a neighboring node, the second table comprising an interference state for the neighboring node;

determining, from the table, an optimal time to transmit to the neighboring node; and

transmitting information to the neighboring node during the determined time period.

3. The method of claim 1 wherein the step of monitoring for interference comprises the step of:

monitoring the frequency band to determine a time period where little or no activity occurs within the frequency band.

4. The method of claim 1 wherein the step of creating the table comprises the step of:

creating a table comprising available slots where interference and/or no interference occurs.

5. The method of claim 1 wherein the step of creating the table comprises the step of:

creating a table comprising optimal and/or sub-optimal time periods for reception.

6. The method of claim 1 wherein the step of broadcasting the node'"'"'s interference state comprises the step of broadcasting via over-the-air communication, the node'"'"'s interference state.

7. The method of claim 2 wherein the step of receiving the second table comprises the step of:

receiving a table comprising available slots where interference and/or no interference occurs.

8. The method of claim 2 wherein the step of receiving the second table comprises the step of:

receiving a table comprising optimal and/or sub-optimal time periods for reception.

9. The method of claim 2 wherein the step of transmitting information comprises the step of transmitting information within the frequency band.

10. An apparatus comprising:

a processor monitoring for interference within a frequency band and outputting a table comprising an interference state;

memory for storing the table; and

a transmitter, for transmitting the table to neighboring nodes within the communication system.

11. The apparatus of claim 10 further comprising:

a receiver, receiving a second table from a neighboring node, the second table comprising an interference state for the neighboring node, wherein the second table is additionally stored within the memory.

12. The apparatus of claim 10 wherein the table comprises available slots where interference and/or no interference occurs.

13. The apparatus of claim 10 wherein the table comprises optimal and/or sub-optimal time periods for reception.