Two-way paging uplink infrastructure

• US 6,097,931 A
• Filed: 08/20/1997
• Issued: 08/01/2000
• Est. Priority Date: 08/20/1997
• Status: Expired due to Term

• Current Assignee: Hanger Solutions, LLC (IP Investments Group LLC)
• Original Assignee: Wireless Online, Inc.
• Inventors: Karmi, Yair, Harel, Haim, Zorman, Ilan, Weiss, Anthony J.
• Primary Examiner(s): Urban, Edward F.
• Application Number:
  US08/915,479
• Time in Patent Office: 1,077 Days
• Field of Search: 455/562, 455/458, 455/38.1, 455/561, 455/276.1, 455/277.1, 455/277.2, 455/278.1, 340/825.44, 343/848
• US Class Current: 340/7.21
• CPC Class Codes: H04B 7/086 using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming

Abstract

A substitute for the uplink infrastructure associated with typical two-way paging protocols. Instead of employing a microcellular arrangement of paging receiver sites, wherein each cell is served by its own receiver site, multiple cells are serviced from a single receiver site. The operation of the protocol need not be modified. A region surrounding the single receiver site is divided into angular sectors. Each angular sector has an associated beam of a multi-element antenna array. The sectors represent the cells used by prior art two-way paging infrastructure. This approach substantially reduces the cost of constructing and operating a two-way pager infrastructure.

Claims

1. A method for operating the uplink portion of a two-way paging network comprising the steps of:

providing a plurality of receivers at a receiver site, each said receiver coupled to a selected beam of a plurality of beams, said plurality of beams being divided among at least three multi-element arrays comprising dipoles over a ground plane, each array defining at least seven beams and substantially covering one-third of a horizontal circular region surrounding said receiver site, said plurality of beams dividing said region into sectors reached by individual ones of said plurality of beams; and

employing said receivers to receive messages transmitted from a plurality of pagers via said plurality of beams.

2. The method of claim 1 wherein said employing step comprises:

receiving signals from said region via a plurality of elements of said multi-element antenna array;

feeding said signals from said elements into a beamforming network that generates an output corresponding to each of said plurality of beams, each said output being coupled to a receiver; and

extracting messages from said plurality of beams.

3. The method of claim 2 wherein said beamforming network comprises:

a circuit implementing Fast Fourier Transforms (FFTs) of said plurality of beams; and

two to eight dipoles for each element operatively coupled to said circuit to produce a Butler network radiation pattern operating in accordance with a Taylor Line-Source procedure.

4. The method of claim 1 wherein said two-way paging protocol is Reflex™

.

5. The method of claim 1 wherein said two-way paging protocol is Inflexion™

.

6. In a two-way paging network, a receiver system comprising:

a plurality of receivers at a receiver site; and

a beamforming network, each output of said beamforming network being coupled to one of said plurality of receivers, each input of said beamforming network being coupled to an element of a multi-element antenna array;

so that each said receiver is coupled to a selected beam of a plurality of beams, said plurality of beams divided among three multi-element arrays arranged in a triangle, each multi-element array comprising dipoles over a ground plane and substantially covering one-third of a horizontal circular region surrounding said receiver site, each multi-element array defining at least seven beams and said plurality of beams dividing said region into sectors reached by individual ones of said plurality of beams.

7. The receiver system of claim 6 further comprising:

said multi-element antenna array.

8. The receiver system of claim 6 wherein said beamforming network comprises:

a circuit configured to implement Fast Fourier Transforms (FFT) of said plurality of beams; and

two to eight dipoles for each element operatively coupled to said circuit to produce a Butler network radiation pattern operating in accordance with a Taylor Line-Source procedure.

9. The receiver system of claim 6 wherein said two-way paging protocol is Reflex™

.

10. The receiver system of claim 6 wherein said two-way paging protocol is Inflexion™

.