Method and apparatus for integration of a wireless communication system with a cable television system

• US 5,839,052 A
• Filed: 02/08/1996
• Issued: 11/17/1998
• Est. Priority Date: 02/08/1996
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Wheatley, Charles E. III, Dean, Richard F., Weaver, Lindsay A. Jr.
• Primary Examiner(s): GRANT, CHRISTOPHER C
• Application Number:
  US08/600,103
• Time in Patent Office: 1,013 Days
• Field of Search: 348/7, 348/12, 348/13, 455/5.1, 455/4.2, 455/6.1, 455/6.2, 455/6.3, 455/400, 455/401, 455/403, 455/423, 455/561, 455/562, 455/524, 455/66, 455/436, 455/440, 455/444, 455/446, 455/447, 455/448 , 455/449
• US Class Current: 725/106
• CPC Class Codes: H04B 2203/5441 Wireless systems or telephone
• CPC Class Codes: H04B 2203/5487 cables
• CPC Class Codes: H04B 3/54 Systems for transmission via power distribution lines
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04N 7/10 Adaptations for transmission by electrical cable H04N7/12 takes precedence
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 36/185 using make before break
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels

Abstract

The present invention is a method and apparatus for integrating a personal communication system with a cable television plant. A set of radio antenna devices (RAD) are connected to the cable plant. The RADs provide frequency conversion and power control of signal received from the cable plant for wireless transmission to the remote units. The RADs also provide power control and frequency conversion of wireless signals received from the remote units for transmission by the RADs onto the cable plant. In addition to the functions of standard base stations and centralized controller, the CATV base station must also compensate for gain variations in the cable plant. The downstream power control is regulated by a RAD reference signal which can be hidden within the CDMA signal for maximum efficiency. The upstream power control is regulated by an upstream gain reference signal which is individually transmitted by each RAD on the upstream link.

Claims

1. An apparatus for providing a communication coverage areas throughout a communication system comprising a cable television plant comprising:

a series of radio antenna devices (RADs) spaced along a cable each of said series of RADs having a cable input and a cable output and a wireless input and a wireless output, wherein each of said series of RADs receives input forward link communication signals and a RAD reference signal from said cable through said cable input and provides output forward link communication signals through said wireless output and receives input reverse link communication signals through said wireless input and provides output reverse link communication signal and upstream gain reference signal through said cable output; and

a headend processor coupled to said cable having a base station, said base station having a set of demodulation elements programmably coupled to at least one of a plurality of said series of RADs;

wherein said RAD reference signal has an absolute value dependent upon a loss between said headend processor and each one of said series of RADs and wherein each one of said series of RADs uses said absolute value of said RAD reference signal to set a power level of said output forward link communication signals.