MIMO coverage over bi-directional leaky cables

Patent metadata

Field	Value
Publication number	US-9331374-B2
Application number	US-201113338522-A
Country	US
Kind code	B2
Filing date	Dec 28, 2011
Priority date	Dec 22, 2011
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

The invention relates to a wireless communications system for communicating with user equipment located inside a physical structure. The system comprise a node having at least two antenna ports and being adapted for wireless communication with the user equipment, and at least one leaky cable having two ends wherein each end of the at least one leaky cable is connected to one of the antenna ports of the node. The at least one leaky cable is provided at least partially inside the physical structure and being adapted for wireless communication over a radio channel with the user equipment.

First claim

The invention claimed is:

1. A wireless communications system for communicating with user equipment located inside a physical structure, comprising:
a node having at least two antenna ports and being adapted for wireless communication with said user equipment, and
at least one leaky cable having only two ends, the two ends comprising a first end and a second end located at opposing ends of said at least one leaky cable and said at least one leaky cable being a continuous cable,
wherein the first end of said at least one leaky cable is connected to one of said antenna ports of said node and the second end of said at least one leaky cable is connected to a different one of said antenna ports of said node, wherein said at least one leaky cable is provided at least partially inside said physical structure and being adapted for wireless communication over a communication channel with said user equipment, and
wherein the node is configured to feed said at least one leaky cable from both the first end and the second end.

2. The wireless communication system according to claim 1 , further comprising:
a first signal divider having at least two signal divider antenna ports and at least one signal divider node port connected to one of said at least two antenna ports of said node;
a second signal divider having at least two signal divider antenna ports and at least one signal divider node port connected to one of said at least two antenna ports of said node;
wherein the first end of said at least one leaky cable is connected, via one of said signal divider antenna ports of said first signal divider, to one of said antenna ports of said node and the second end of said at least one leaky cable is connected, via one of said signal divider antenna ports of said second signal divider, to a different one of said antenna ports of said node.

3. The wireless communication system according to claim 2 , wherein both ends of a first leaky cable is each connected to one of said signal divider antenna ports of said first signal divider, while both ends of a second leaky cable is each connected to one of said signal divider antenna ports of said second signal divider.

4. The wireless communication system according to claim 2 , wherein one end of a first leaky cable is connected to one of said signal divider antenna ports of said first signal divider while the other end of said first leaky cable is connected to one of said signal divider antenna ports of said second signal divider, and
one end of a second leaky cable is connected to one of said signal divider antenna ports of said first signal divider while the other end of said of said second leaky cable is connected to one of said signal divider antenna ports of said second signal divider.

5. The wireless communication system according to claim 1 , wherein the system is adapted for wireless multiple-input multiple-output communication with said user equipment.

6. The wireless communication system according to claim 1 , further comprising:
a first signal divider having at least two signal divider antenna ports and at least one signal divider node port connected to one of said at least two antenna ports of said node;
wherein the first end of said at least one leaky cable is connected, via one of said signal divider antenna ports of said first signal divider, to one of said antenna ports of said node, and the second end of said at least one leaky cable is connected, via one of said signal divider antenna ports of said first signal divider, to the same one of said antenna ports of said node.

7. A method for providing wireless communication between a node and user equipment located inside a physical structure, the method comprising:
configuring said node, having at least two antenna ports, for wireless communication with said user equipment,
configuring at least one leaky cable, having only two ends, the two ends comprising a first end and a second end located at opposing ends of said at least one leaky cable, for wireless communication and said at least one leaky cable being a continuous cable,
connecting the first end of said at least one leaky cable to one of said antenna ports of said node and connecting the second end of said at least one leaky cable to a different one of said antenna ports of said node,
providing said at least one leaky cable at least partially inside said physical structure, and
configuring said at least one leaky cable for wireless communication for over a communication channel with said user equipment, and
wherein the node is configured to feed said at least one leaky cable from both the first end and the second end.

8. The method according to claim 7 , further comprising:
connecting a first signal divider having at least two signal divider antenna ports and at least one signal divider node port to one of said at least two antenna ports of said node;
connecting a second signal divider having at least two signal divider antenna ports and at least one signal divider node port connected to one of said at least two antenna ports of said node; and
connecting the first end and the second end of said at least one leaky cable, via one of said signal divider antenna ports of one of said first signal divider and said second signal divider, to one of said antenna ports of said node.

9. The method according to claim 8 , further comprising:
connecting both ends of a first leaky cable to each of one of said signal divider antenna ports of said first signal divider; and
connecting both ends of a second leaky cable to each of one of said signal divider antenna ports of said second signal divider.

10. The method according to claim 9 , further comprising:
providing said first leaky cable and said second leaky cable in said physical structure such that they are deployed in parallel to each other to provide essentially the same indoor coverage.

11. The method according to claim 9 , further comprising:
providing said first leaky cable and said second leaky cable in said physical structure to provide indoor coverage of two separate areas in said physical structure.

12. The method according to claim 8 , further comprising:
connecting one end of a first leaky cable to one of said signal divider antenna ports of said first signal divider,
connecting the other end of said first leaky cable to one of said signal divider antenna ports of said second signal divider, and
connecting one end of a second leaky cable to one of said signal divider antenna ports of said first signal divider, and
connecting the other end of said of said second leaky cable to one of said signal divider antenna ports of said second signal divider.

13. The method according to claim 8 , further comprising:
adapting said node, said first and second signal dividers and said at least one leaky cable for wireless multiple-input multiple-output communication with said user equipment.

Assignees

• Coldrey Mikael
• Asplund Henrik
• Johansson Martin
• Nilsson Andreas
• Ericsson Telefon Ab L M

Inventors

• Coldrey Mikael
• Asplund Henrik
• Johansson Martin
• Nilsson Andreas

Classifications

• H01Q13/203 Primary

  Leaky coaxial lines · CPC title

• H04B7/0413 Primary

  MIMO systems · CPC title

• H01Q1/007 Primary

  specially adapted for indoor communication · CPC title

• H04B5/0018

  Electricity · mapped topic

• H04B5/28

  using the near field of leaky cables, e.g. of leaky coaxial cables · CPC title