Method and apparatus for transmitting information within a communication system

• US 7,269,152 B2
• Filed: 02/14/2003
• Issued: 09/11/2007
• Est. Priority Date: 02/14/2003
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Vukovic, Ivan, Odlyzko, Paul, Freeburg, Thomas A.
• Primary Examiner(s): Kizou; Hassan
• Assistant Examiner(s): Ahmed; Salman
• Application Number:
  US10/366,860
• Publication Number:
  US 20040160916A1
• Time in Patent Office: 1,670 Days
• Field of Search: 370/280, 370/314, 370/468, 455/296, 455/63.1, 455/67.11
• 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 both optimal and suboptimal time periods for reception within the frequency band wherein the optimal and sub-optimal time periods for reception varies according the node'"'"'s interference state;

broadcasting the node'"'"'s interference state to a plurality of neighboring nodes within the communication system;

receiving a second table from at least one of the plurality of neighboring nodes, the second table being broadcast by the neighbor node to other nodes in the communication system, the second table comprising an interference state and both the optimal and sub-optimal time periods for reception within the frequency band for the neighboring node;

determining, from the second table, a time to transmit to the neighboring node wherein the time can be selected from one of the optimal time and the suboptimal time periods for reception within the frequency band obtained from the second table; and

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

2. 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.

3. 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.

4. 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.

5. The method of claim 1 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.

6. The method of claim 1 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.

7. The method of claim 1 wherein the step of transmitting information comprises the step of transmitting information within the frequency band.

8. The method of claim 1 wherein the table further comprises power control information.

9. The method of claim 1 further comprising updating the table by entering updated interference states and updated optimal and/or sub-optimal time periods.

10. An apparatus comprising:

a processor monitoring for interference within a frequency band and outputting a table comprising an interference state and both optimal and suboptimal time periods within the frequency band for reception wherein the optimal and suboptimal time periods within the frequency band for reception varies according the node'"'"'s interference state;

memory for storing the table;

a transmitter, for transmitting the table to a plurality of neighboring nodes within a communication system; and

a receiver, receiving a second table from at least one of the neighboring nodes, the neighboring node broadcasting the second table to other nodes in the communication system, the second table comprising an interference state and both the optimal and sub-optimal time periods within the frequency band of reception for the neighboring node, wherein the second table is additionally stored within the memory, and

wherein the processor determines a time to transmit to one of the neighboring nodes from selected from among the optimal and suboptimal time periods within the frequency band obtained from the second table.

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

12. The apparatus of claim 10 wherein the table further comprises power control information.

13. The apparatus of claim 10 wherein the processor continues monitoring for interference to output the table with updated interference states and optional and/or sub-optimal time periods.