Method for reducing latency of wireless data packet delivery

• US 9,113,485 B2
• Filed: 04/22/2009
• Issued: 08/18/2015
• Est. Priority Date: 04/22/2008
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Chintalapudi, Krishna Kant, Venkatraman, Lakshmi
• Primary Examiner(s): Yao, Kwang B
• Assistant Examiner(s): LOO, JUVENA W
• Application Number:
  US12/428,021
• Publication Number:
  US 20090323716A1
• Time in Patent Office: 2,309 Days
• Field of Search: 370310-330
• US Class Current: 1/1
• CPC Class Codes: H04W 74/0841 with collision treatment
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A wireless data transmission method includes providing a plurality of radio frequency transmitters. A receiver is provided to receive transmissions from the transmitters. A data format including a plurality of transmission time slots is defined. Each of the transmitters is caused to independently select one of the time slots. The transmitters are used to transmit the transmissions to the receiver in the independently selected time slots.

Claims

1. A wireless data transmission method comprising:

providing a plurality of radio frequency transmitters;

providing a plurality of receivers to receive transmissions from the transmitters;

configuring each of the receivers to receive the transmissions on a respective one of a plurality of frequency channels;

defining a data format including a plurality of transmission time slots;

causing each of the transmitters to independently select one of the time slots and one of the frequency channels; and

using the transmitters to transmit the transmissions to the receiver in the independently selected time slots and the independently selected frequency channels,

wherein, if at least two of the transmitters conflict by transmitting the transmission in a same one of the independently selected time slots and in a same one of the independently selected frequency channels, the method comprises the further step of using the conflicting transmitters to re-transmit the transmissions to the receiver, and

wherein the method comprises the further step of transmitting acknowledgement codes from the receiver to non-conflicting ones of the transmitters.

2. The method of claim 1 wherein the acknowledgement codes are transmitted to only ones of the non-conflicting transmitters from which the transmissions have been successfully received by the receiver.

3. A wireless data transmission method comprising:

providing a plurality of radio frequency transmitters;

providing a plurality of receivers to receive transmissions from the transmitters;

configuring each of the receivers to receive the transmissions on a respective one of a plurality of frequency channels;

defining a data format including a plurality of transmission time slots;

causing each of the transmitters to independently select one of the time slots and one of the frequency channels; and

using the transmitters to transmit the transmissions to the receiver in the independently selected time slots and the independently selected frequency channels,

wherein, if at least two of the transmitters conflict by transmitting the transmission in a same one of the independently selected time slots and in a same one of the independently selected frequency channels, the method comprises the further step of using the conflicting transmitters to re-transmit the transmissions to the receiver, and

wherein the method comprises the further step of causing each of the conflicting transmitters to at least one of independently re-select one of the time slots and independently re-select one of the frequency channels, the conflicting transmitters being used to re-transmit the transmissions to the receiver in at least one of the independently re-selected time slots and the independently re-selected frequencies.

4. A wireless data transmission method comprising:

providing a plurality of radio frequency transmitters;

providing a plurality of receivers to receive transmissions from the transmitters;

configuring each of the receivers to receive the transmissions on a respective one of a plurality of frequency channels;

defining a data format including a plurality of transmission time slots;

causing each of the transmitters to independently select one of the time slots and one of the frequency channels; and

using the transmitters to transmit the transmissions to the receiver in the independently selected time slots and the independently selected frequency channels,

wherein the time slots are selected by the transmitters such that the selected times are substantially evenly distributed over a time period.