Microcell layout having directional and omnidirectional antennas defining a rectilinear layout in a building

• US 5,564,121 A
• Filed: 08/18/1994
• Issued: 10/08/1996
• Est. Priority Date: 08/18/1994
• Status: Expired due to Term

• Current Assignee: RPX Clearinghouse LLC (RPX Corporation)
• Original Assignee: Northern Telecom Limited (Nortel Networks Corporation)
• Inventors: Chow, Peter E., Karim, Ali K., Fung, Victor
• Primary Examiner(s): FAILE, ANDREW I
• Application Number:
  US08/292,275
• Time in Patent Office: 782 Days
• Field of Search: 455/33.1, 455/33.2, 455/33.3, 455/33.4, 455/53.1, 455/54.1, 455/54.2, 455/56.1, 455/51.2, 455/63, 455/277.1, 455/277.2, 455/272, 455/129, 379/59, 379/58, 379/63, 370/24, 370/29, 370/36, 342/368, 342/371
• US Class Current: 455/25
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 16/12 Fixed resource partitioning
• CPC Class Codes: H04W 16/24 Cell structures
• CPC Class Codes: H04W 16/32 Hierarchical cell structures

Abstract

A radio communication system is provided wherein radio coverage building blocks are used to provide uniform radio coverage to rectilinear floor layouts of buildings. The building blocks are comprised of directional and omnidirectional antennas which are applied to rectangular and irregular layouts. Each building block is divided into multiple small zones and each zone is covered by an antenna. Each antenna in the building block is connected to the same base station through a low loss coupling matrix and all antennas transmit and receive simultaneously. The directional antennas are located near the boundary of the service area. An omnidirectional or directional antenna at the center of the zone may be used to fill the rest of the area.

Claims

1. A radio communication system for providing a radio communication service within a predetermined rectangular region, the system comprising:

a radio transceiver being operable to communicate on a radio channel;

an array of antennas, the array comprising a plurality of directional antennas, each directional antenna being disposed at a respective location on a boundary of the rectangular region and being aimed inwardly of the boundary; and

a coupler for coupling said radio transceiver to each antenna of the antenna array, such that said radio transceiver can communicate on said radio channel using all of the antennas of the antenna array simultaneously.

2. A radio communication system as defined in claim 1, wherein the respective location of each directional antenna is a respective corner of the rectangular region.

3. A radio communication system as defined in claim 2, wherein the array comprises an additional antenna disposed centrally in the rectangular region.

4. A radio communication system as defined in claim 3, wherein the additional antenna is an omnidirectional antenna.

5. A radio communication system as defined in claim 1, wherein the coupler comprises at least one attenuator for adjusting a transmission power of a radio signal transmitted by an antenna of the array.

6. A radio communication system as defined in claim 1, further comprising an additional array of antennas for providing the radio communication service to an additional rectangular region, the coupler being operable to couple said radio transceiver to each antenna of the additional antenna array, such that said radio transceiver can communicate on said radio channel using all antennas of both antenna arrays simultaneously.

7. A method for operating a radio communication system to provide a radio communication service within a predetermined rectangular region, the method comprising:

providing a radio transceiver being operable to communicate on a radio channel;

providing an array of antennas, the array comprising a plurality of directional antennas, each directional antenna being disposed at a respective location on a boundary of the rectangular region and being aimed inwardly of the boundary;

coupling said radio transceiver to each antenna of the antenna array; and

operating said radio transceiver to communicate on said radio channel, said radio channel using all of the antennas of the antenna array simultaneously.

8. A method as defined in claim 7, wherein the directional antennas are provided at respective corners of the rectangular region.

9. A method as defined in claim 8, further comprising providing an additional antenna at a location which is centrally disposed in the rectangular region and coupling each radio transceiver to the additional antenna.