Multi-donor booster operation and system

• US 5,218,715 A
• Filed: 01/15/1991
• Issued: 06/08/1993
• Est. Priority Date: 01/15/1991
• Status: Expired due to Term

• Current Assignee: Allen Telecom LLC (CommScope Holding Company, Inc.)
• Original Assignee: Orion Industries Incorporated
• Inventors: Bowen, William A., Evans, Michael W., Leslie, Samuel A.
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): BELZER, CHRISTINE
• Application Number:
  US07/641,173
• Time in Patent Office: 875 Days
• Field of Search: 455/9, 455/15, 455/17, 455/33, 379/60, 375/4
• US Class Current: 455/15
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 36/0085 Hand-off measurements
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

A system and method for handing back a movable transceiver to a different cell site from the original cell site includes circuitry for sensing signals from the movable transceiver which are transmitted on a modified frequency as well as circuitry for translating those signals back to their originally assigned frequencies without changing the detected field strength of the signal, in combination with circuitry for forwarding the translated signals to the different cell site for hand-off evaluation. The method includes sensing the received signals, translating the received signals to an originally assigned frequency based on either a fixed offset or other provided information concerning the translation along with a step of continually updating those frequencies which are to be retranslated.

Claims

1. A system for providing an improved hand-off capability for a movable transceiver between a donor and a target cell site where coverage of one of the cell sites if enhanced by a frequency-translation type booster associated with the donor cell site and the movable transceiver is communicating with the donor cell site via the booster, the system comprising:

means, coupled to the target cell site, for detecting translated communications between the movable transceiver and the booster;

means, coupled to said detecting means, for translating a detected communication, previously translated by the booster from an original frequency assigned by the donor cell to a second frequency assigned by the booster, back to the original frequency; and

means coupled to said translating means, for forwarding the back-translated communication to the target cell site.

2. A system as in claim 1 including means, located in part at the booster and in-part at the translating means, for passing information related to enhanced communications from the booster to said means.

3. A system as in claim 1 with said translating means including at least one adjustable, intermediate frequency amplifier means.

4. A system as in claim 1 including means, coupled to said translating means, for controlling said translating.

5. A system for providing an improved hand-off capability for a movable transceiver between a donor and a target cell site where the movable transceiver operates on a donor assigned frequency, and where coverage of one of the cell sites is enhanced by a frequency-translation type booster associated with the donor cell site and the movable transceiver is communicating with the donor cell site via the booster, the system comprising:

circuitry coupled to the target cell site, for detecting frequency translated communications between the movable transceiver and the booster;

amplifier circuitry for translating a detected communication, previously translated by the booster, back to a donor cell assigned frequency; and

a coupler for forwarding the back-translated communication to the target cell site.

6. A system as in claim 5 including circuitry located in part at the booster and in-part at the translating means, for passing information related to enhanced communications from the booster to said means.

7. A system as in claim 5 with said translating circuitry including at least one adjustable, intermediate frequency amplifier means.

8. A system as in claim 5 including a microprocessor coupled to said translating means, for controlling said translating.

9. A system as in claim 5 wherein said amplifier circuitry translates each said detected communication a predetermined amount.

10. An apparatus for facilitating a hand-off, between a donor cell site and a target cell site, of a movable transceiver located in a region serviced by a frequency transferring booster coupled to the donor cell where the transceiver is communicating with the booster on a booster assigned translated frequency, and the booster is communicating with the donor cell site on a donor site assigned frequency, the apparatus comprising:

means for receiving a translated frequency communication from the movable transceiver;

means for translating the received communication to the donor site assigned frequency; and

means for sending said translated communication to the target cell site.

11. An apparatus as in claim 10 with said translating means including adjustable frequency amplifier means coupled to means for controlling said translation.

12. An apparatus as in claim 10 with said translating means including means for maintaining a selected parameter of the received communication at a received value during said translation.

13. An apparatus as in claim 12 with said maintaining means including a unity gain amplifier.

14. An apparatus as in claim 10 including means for receiving translation related information from the booster.

15. An apparatus as in claim 14 with said receiving means including a selected antenna.

16. A method of transferring control of a movable transceiver in communication with a booster, from a first, fixed, transceiver with a first coverage area extended by the booster, to a second fixed transceiver with a second coverage area which is overlapped, in part, by an area of coverage of the booster, the method comprising:

detecting a radio transmission from the movable transceiver to the booster on a frequency assigned by the booster;

translating the detected transmission to a frequency originally assigned thereto by the first, fixed, transceiver; and

transferring a representation of the translated transmission to the second transceiver for evaluation.

17. A method as in claim 16 including sending translating related control information from the booster.

18. A method as in claim 16 including storing a translating related frequency off-set.

19. A method as in claim 16 wherein the detected signal has a parameter with a measurable value and including in the translating step, maintaining the value of the parameter of the detected transmission.

20. A method as in claim 16 including storing a plurality of representations of signals.

21. A method as in claim 20 including forming a list of frequencies to be translated.