Concept for bidirectional data transmission between a base station and a node

• US 9,247,539 B2
• Filed: 03/03/2014
• Issued: 01/26/2016
• Est. Priority Date: 09/02/2011
• Status: Active Grant

• Current Assignee: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forsching E.V.
• Original Assignee: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forsching E.V.
• Inventors: Bernhard, Josef, Kilian, Gerd
• Primary Examiner(s): Liu, Jung-Jen
• Application Number:
  US14/195,288
• Publication Number:
  US 20140192789A1
• Time in Patent Office: 694 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/0078 Timing of allocation
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames

Abstract

Embodiments of the present invention provide a base station including bidirectional data transmission to a node. The base station has a receiver for receiving a data packet transmitted by the node at a node transmission frequency, the node transmission frequency being derived from a frequency generator of the node. In addition, the base station has a determiner for determining the node transmission frequency based on the data packet received and for determining a deviation of the frequency generator of the node based on a frequency deviation between the determined node transmission frequency and a set node transmission frequency associated to the node. Furthermore, the base station has a transmitter for transmitting a data packet to the node at a base station transmission frequency, the transmitter for transmitting the data packet being configured to set the base station transmission frequency based on the determined deviation of the frequency generator of the node.

Claims

1. A base station comprising bidirectional data transmission to a node, comprising:

a receiver for receiving a data packet transmitted by the node at a node transmission point in time, the node transmission point in time being derived from a timer of the node;

a determiner for determining the node transmission point in time based on the data packet received and for determining a time deviation of the timer of the node based on a time deviation between the determined node transmission point in time and a set node transmission point in time associated to the node;

a transmitter for transmitting a data packet to the node, the data packet comprising the determined time deviation of the timer of the node or a correction value derived therefrom;

wherein the receiver for receiving the data packet transmitted by the node at the node transmission point in time is configured to receive a further data packet transmitted by the node at a further node transmission point in time, the further node transmission point in time being derived from the timer of the node;

wherein the determiner for determining the node transmission point in time is configured to determine the further node transmission point in time based on the further data packet, the determiner for determining the time deviation of the timer of the node being configured to determine a further time deviation between the determined further node transmission point in time and a further set node transmission point in time associated to the node and to determine a clock deviation of the timer of the node based on the time deviation and the further time deviation;

wherein the transmitter for transmitting the data packet to the node is configured to transmit the data packet to the node at the determined clock deviation of the timer or comprising a correction value derived therefrom; and

wherein the base station comprises a coordinator for coordinating the node configured to associate the set node transmission point in time to the node.

2. The base station in accordance with claim 1, wherein the transmitter for transmitting the data packet to the node is configured to transmit the data packet to the node for synchronization of a node receiving point in time at a base station transmission point in time or comprising a value derived therefrom.

3. The base station in accordance with claim 1, wherein the transmitter for transmitting the data packet is configured to transmit the data packet at a base station transmission point in time, the coordinator for coordinating the node being configured to not associate the base station transmission point in time to a node as the set node transmission point in time.

4. A system comprising bidirectional data transmission, comprising:

a base station in accordance with claim 1; and

a node, the node comprising a transmitter for transmitting the data packet to the base station at the node transmission point in time and a receiver for receiving the data packet from the base station, the transmitter for transmitting the data packet being configured to set the node transmission point in time to the set node transmission point in time based on the determined deviation of the timer or the correction value derived therefrom.

5. A method for bidirectional data transmission between a base station and a node, comprising:

receiving a data packet transmitted by the node at a node transmission point in time, the node transmission point in time being derived from a timer of the node;

determining the node transmission point in time based on the data packet received and determining a time deviation of the timer of the node based on a time deviation between the determined node transmission point in time and a set node transmission point in time associated to the node;

transmitting a data packet to the node, the data packet comprising the determined time deviation of the timer of the node and a correction value derived therefrom;

receiving a further data packet transmitted by the node at a further node transmission point in time, the further node transmission point in time being derived from the timer of the node;

determining the further node transmission point in time based on the further data packet and determining a further time deviation of the timer of the node based on a further time deviation between the determined further node transmission point in time and a further set node transmission point in time associated to the node;

determining a clock deviation of the timer of the node based on the time deviation and the further time deviation; and

wherein transmitting the data packet to the node comprises transmitting the data packet at the determined time deviation of the timer of the node or comprising a correction value derived therefrom;

coordinating the node, wherein coordinating the node comprises associating the set node transmission point in time to the node.

6. A non-transitory computer-readable medium having instructions stored thereon, wherein the instructions, when executed by a computer or a microprocessor, perform the method in accordance with claim 5.