Wireless communication system

Patent metadata

Field	Value
Publication number	US-9455764-B2
Application number	US-201414529459-A
Country	US
Kind code	B2
Filing date	Oct 31, 2014
Priority date	May 2, 2007
Publication date	Sep 27, 2016
Grant date	Sep 27, 2016

Abstract

A method for communication includes transmitting a first uplink message from a first remote node ( 200, 300, 400 ) to a central node ( 100 ) in a wireless communication system according to a first frequency hopping scheme, and transmitting a second uplink message from a second remote node to the central node in the wireless communication system according to a second frequency hopping scheme, different from the first scheme. Both the first and the second uplink messages are received and processed at the central node.

First claim

The invention claimed is:

1. A method for communication in a wireless communication system comprising at least a first node and a second node, the method comprising:
defining an antenna switching function of the first node, the antenna switching function specifying, for each antenna of a plurality of antennas of the first node, a corresponding time slot in which the antenna will receive transmissions;
selecting, by the second node, a favored antenna from among the plurality of antennas of the first node, the favored antenna being favored by the second node for receiving, by the first node, transmissions transmitted from the second node to the first node;
responsive to the selecting, by the second node, of the favored antenna from among the plurality of antennas of the first node, selecting, by the second node, a favored time slot, the favored time slot corresponding to the selected favored antenna, in accordance with the antenna switching function of the first node;
and responsive to the selecting, by the second node, of the favored time slot, transmitting a message from the second node to the first node during the favored time slot, thereby causing receipt of the message by the favored antenna at the first node,
wherein selecting the favored antenna comprises evaluating respective scores of the antennas of the first node, and evaluating the respective scores comprises evaluating a quality of a respective propagation channel between the second node and each of the antennas, and evaluating the quality of the respective propagation channel comprises evaluating signal quality parameters measured by the second node when receiving an acknowledgment transmitted via each of the antennas.

2. The method according to claim 1 , wherein evaluating the respective scores comprises evaluating a history of successful receptions via each of the antennas.

3. The method according to claim 1 , wherein the signal quality parameters comprise a received signal level.

4. The method according to claim 1 , wherein evaluating the quality of the respective propagation channel comprises measuring signal quality parameters at the first node when receiving transmissions from the second node, and incorporating a value of the measured signal quality parameters within the ACK reply for use in computing the respective scores at the second node.

5. The method according to claim 4 , wherein the signal quality parameters comprise a received signal level.

6. A method for communication in a wireless communication system comprising at least a first node and a second node, the method comprising:
defining an antenna switching function of the first node, the antenna switching function specifying, for each first antenna of a plurality the first antennas of the first node, a corresponding time slot in which the first antenna will receive transmissions;
selecting, by the second node, for each first antenna of the plurality of the first antennas of the first node, a corresponding favored second antenna from among a plurality of second antennas of the second node for transmitting transmissions that will be received via the first antenna;
for a given time slot, ascertaining, by the second node, a time slot-specific first antenna of the plurality the first antennas which will receive transmissions during the given time slot in accordance with the antenna switching function of the first node;
responsive to the ascertaining of the time slot-specific first antenna, ascertaining, by the second node, the corresponding favored second antenna for transmitting transmissions which will be received via the time slot-specific first antenna;
transmitting, by the second node, during the given time slot, a message to the selected first antenna of the first node via the corresponding favored second antenna of the second nod,
wherein selecting the favored second antenna comprises evaluating respective scores of the second antennas of the second node, and evaluating the respective scores comprises evaluating a quality of a respective propagation channel between the first node and each of the second antennas, and evaluating the quality of the respective propagation channel comprises evaluating signal quality parameters measured by the first node when receiving an acknowledgment transmitted via each of the second antennas.

7. The method according to claim 6 , wherein transmitting the message comprises forwarding an uplink message.

8. A wireless communication system for communicating in a wireless communication system, the system comprising:
a first node, comprising a plurality of antennas and having a predefined antenna switching function associated therewith, which antenna switching function specifies, for each of the plurality of the antennas, a corresponding time slot in which the antenna will receive transmissions;
and a second node operative:
to select a favored antenna from among the plurality of antennas of the first node, the favored antenna being favored by the second node for receiving, by the first node, transmissions transmitted from the second node to the first node;
responsive to the selecting, by the second node, of the favored antenna from among the plurality of antennas of the first node, to select a favored time slot, the favored time slot corresponding to the selected favored antenna, in accordance with the antenna switching function of the first node;
and responsive to the selecting, by the second node, of the favored time slot, to transmit a message to the first node during the favored time slot, thereby causing receipt of the message by the favored antenna at the first node,
wherein the second node is further operative to select the favored antenna by evaluating respective scores of the antennas of the first node, in which evaluating the respective scores comprises evaluating a quality of a respective propagation channel between the second node and each of the antennas, and in which evaluating the quality of the respective propagation channel comprises evaluating signal quality parameters measured by the second node when receiving an acknowledgment transmitted via each of the antennas.

9. The system according to claim 8 , wherein evaluating the respective scores comprises evaluating a history of successful receptions via each of the antennas.

10. The system according to claim 8 , wherein the signal quality parameters comprise a received signal level.

11. The system according to claim 8 , wherein evaluating the quality of the respective propagation channel comprises measuring signal quality parameters at the first node when receiving transmissions from the second node, and incorporating a value of the measured signal quality parameters within the ACK reply for use in computing the respective scores at the second node.

12. The system according to claim 11 , wherein the signal quality parameters comprise a received signal level.

13. A wireless communication system for communicating in a wireless communication system, the system comprising:
a first node, comprising a plurality of first antennas and having a predefined antenna switching function associated therewith, which antenna switching function specifies, for each first antenna of the plurality of first antennas, a corresponding time slot in which the first antenna will receive transmissions;
and a second node comprising a plurality of second antennas, and operative to:
select, for each first antenna of the plurality of the first antennas of the first node, a corresponding favored second antenna from among the plurality of second antennas for transmitting transmissions that will be received via the first antenna;
for a given time slot, to ascer

Assignees

• Tyco Fire & Security Gmbh

Inventors

• Mushkin Mordechai
• Zigdon Shimon
• Ratner Miri
• Harif David

Classifications

• H04B7/0808

  comparing all antennas before reception · CPC title

• H04W72/542

  using measured or perceived quality · CPC title

• H04B1/71635

  Transmitter aspects (H04B1/7174 takes precedence) · CPC title

• H04B1/7183

  Synchronisation · CPC title

• H04B1/713 Primary

  using frequency hopping · CPC title