Uncoordinated microwave paths in coordinated frequency bands

• US 8,326,314 B1
• Filed: 05/23/2011
• Issued: 12/04/2012
• Est. Priority Date: 02/13/2006
• Status: Active Grant

• Current Assignee: Wireless Strategies, Inc.
• Original Assignee: Wireless Strategies, Inc.
• Inventors: Mulcay, Michael
• Primary Examiner(s): Hu, Jinsong
• Assistant Examiner(s): Elhag, Magdi
• Application Number:
  US13/113,878
• Time in Patent Office: 561 Days
• Field of Search: 455/454, 455/63.1, 455/63.3, 455/63.4, 455/67.15, 455/67.13, 455/114.2, 455/426.1, 455/426.2, 455446-449
• US Class Current: 455/454
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

A system is described. The system includes a fixed microwave path pair between a first site and a second site and an additional microwave path between the first site and a third site. A transceiver portion of the first site and a transceiver portion of the second site are configured to transmit on the fixed microwave path pair on TDD-FDD reversed paired frequencies. The transceiver portion of the first site is configured to transmit to the transceiver portion of the third site on one frequency of the paired frequencies using the side lobe radiation of an antenna at the first site.

Claims

1. A method for operating an uncoordinated microwave path in coordinated frequency bands, comprising:

in a safe area defined by and including the union of a first coordination area of a first base station at a first site and a second coordination area of a second base station at a second site,

operating a first coordinated microwave path from the first base station to the second base station on a frequency pair using frequency division duplex-time division duplex (FDD-TDD);

operating a second coordinated microwave path from the second base station to the first base station on the frequency pair using FDD-TDD such that a first frequency and a second frequency of the frequency pair cause co-channel interference within the safe area, the co-channel interference increased sufficiently that a foreign transceiver cannot operate on a different coordinated microwave path on the first frequency or the second frequency in the safe area without being subjected to or causing interference greater than a permissible level; and

transmitting on an uncoordinated microwave path operating with time division duplex (TDD) from a transceiver portion of the first base station to a transceiver portion at a third site located in the safe area on the first and/or second frequency using a side lobe of an antenna of the first base station.

2. The method of claim 1, wherein the co-channel interference is such that no foreign transceiver can operate on a different coordinated microwave path on the first frequency or the second frequency in the safe area without being subjected to or causing interference greater than the permissible level.

3. The method of claim 1, wherein transmitting on an uncoordinated microwave path from the transceiver portion of the first base station to the transceiver portion at the third site includes transmitting on the first frequency and the second frequency.

4. The method of claim 1, wherein the transceiver portion at the third site is configured to operate as an access point or laptop for a personal area network, a wireless local area network, or a wireless metropolitan area network.

5. A method for operating an uncoordinated microwave path in coordinated frequency bands, comprising:

in a safe area defined by and including the union of a first coordination area of a first base station at a first site and a second coordination area of a second base station at a second site, wherein a first coordinated microwave path is operated from the first base station to the second base station on a frequency pair using frequency division duplex-time division duplex (FDD-TDD) and a second coordinated microwave path is operated from the second base station to the first base station on the frequency pair using FDD-TDD such that a first frequency and a second frequency of the frequency pair cause co-channel interference within the safe area, the co-channel interference increased sufficiently that a foreign transceiver cannot operate on a different coordinated microwave path on the first frequency or the second frequency in the safe area without being subjected to or causing interference greater than a permissible level,

transmitting on an uncoordinated microwave path operating with time division duplex (TDD) from a transceiver portion at a third site located in the safe area to a transceiver portion of the first base station on the first and/or second frequency using a side lobe of an antenna of the first base station.

6. The method of claim 5, wherein the co-channel interference is such that no foreign transceiver can operate on a different coordinated microwave path on the first frequency or the second frequency in the safe area without being subjected to or causing interference greater than the permissible level.

7. The method of claim 5, wherein transmitting on an uncoordinated microwave path from the transceiver portion at the third site to the transceiver portion of the first base station includes transmitting on the first frequency and the second frequency.

8. The method of claim 5, wherein the transceiver portion at the third site is configured to operate as an access point or laptop for a personal area network, a wireless local area network, or a wireless metropolitan area network.

9. An auxiliary station comprising:

a transceiver portion located in a safe area defined by and including the union of a first coordination area of a first base station at a first site and a second coordination area of a second base station at a second site, the safe area being subject to co-channel interference created by transmitting from the first base station and the second base station on a first frequency and a second frequency using frequency division duplex-time division duplex (FDD-TDD), the co-channel interference increased sufficiently that a foreign transceiver cannot operate on a different coordinated microwave path on the first frequency or the second frequency in the safe area without being subjected to or causing interference greater than a permissible level, the transceiver portion configured to transmit to and receive from a transceiver portion of the first base station on an uncoordinated microwave path operating with time division duplex (TDD) on the first frequency and/or a second frequency using a side lobe of an antenna of the first base station.

10. The auxiliary station of claim 9, wherein the transceiver portion is configured to transmit and receive on the first frequency and the second frequency.

11. The auxiliary station of claim 9, wherein the transceiver portion is configured to operate as an access point or laptop for a personal area network, a wireless local area network, or a wireless metropolitan area network.

12. A first base station comprising:

a transceiver portion at a first site configured to transmit to and receive from a transceiver portion of a second base station at a second site on a coordinated microwave path pair on a first frequency and a second frequency using frequency division duplex-time division duplex (FDD-TDD), the transceiver portion of the first base station further configured to transmit to and receive from a transceiver portion at a third site on an uncoordinated microwave path operating with time division duplex (TDD) on the first frequency and/or second frequency using a side lobe of an antenna of the first base station, the third site located in a safe area, the safe area defined by and including the union of a first coordination area of the first base station and a second coordination area of the second base station, the safe area being subject to co-channel interference created by transmitting from the first base station and the second base station on the first frequency and the second frequency, the co-channel interference increased sufficiently that a foreign transceiver cannot operate on a different coordinated microwave path on the first frequency or the second frequency in the safe area without being subjected to or causing interference greater than a permissible level.

13. The first base station of claim 12, wherein the co-channel interference is such that no foreign transceiver can operate on a different coordinated microwave path on the first frequency or the second frequency in the safe area without being subjected to or causing interference greater than the permissible level.

14. The first base station of claim 12, wherein the transceiver portion at the first site is configured to transmit and receive on the first frequency and the second frequency.