Method and apparatus for providing cellular telephone service to a macro-cell and pico-cell within a building using shared equipment

• US 5,946,622 A
• Filed: 11/19/1996
• Issued: 08/31/1999
• Est. Priority Date: 11/19/1996
• Status: Expired due to Term

• Current Assignee: Unwired Planet LLC (JP Morgan Chase & Co)
• Original Assignee: Ericsson, Inc. (Telefonaktiebolaget LM Ericsson)
• Inventors: Bojeryd, Nils Johan
• Primary Examiner(s): WOLFE JR, WILLIS RAY
• Application Number:
  US08/752,253
• Time in Patent Office: 1,015 Days
• Field of Search: 455/422, 455/426, 455/444, 455/446, 455/447, 455/448, 455/449
• US Class Current: 455/444
• 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 16/32 Hierarchical cell structures
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

The present invention is an apparatus and method for providing cellular telephone service to a pico-cell located within a building and extending cellular telephone service from a macro-cell located outside the building to inside the building. A first set of transceivers provide cellular telephone service to the macro-cell and a second set of transceivers provide cellular telephone service to the pico-cell. A series of combiners which combine multiple radio frequency signals into a single radio frequency signal and splitters which replicate a single radio frequency signal into multiple copies of the same radio frequency signal are used to connect both sets of transceivers to a common plurality of antennas located within the building.

Claims

1. An apparatus for providing cellular telephone service within a building comprising:

means for establishing cellular telephone service in a pico-cell located within the building, wherein the pico-cell is allocated use of a first group of frequencies;

means for extending cellular telephone service from a macro-cell located outside the building to inside the building, wherein the macro-cell is allocated use of a second group of frequencies;

a shared antenna located within the building for transmitting and receiving signals both on the first group of frequencies for the pico-cell located within the building and on the second group of frequencies for the macro-cell; and

means for integrating the pico-cell and macro-cell cellular telephone service onto the shared antenna located within the building.

2. The apparatus recited in claim 1, wherein the means for establishing cellular telephone service to the pico-cell located within the building comprises:

a base station connected to a cellular telephone network; and

a plurality of transceivers connected to the base station for communicating with the cellular telephone network and the plurality of transceivers further connected to the shared antenna located within the building for communicating with and providing pico-cell coverage to cellular telephones located within the building.

3. The apparatus recited in claim 1, wherein the means for extending cellular telephone service from the macro-cell located outside the building to inside the building comprises:

a base station connected to a cellular telephone network; and

a plurality of transceivers connected to the base station for communicating with the cellular telephone network, the plurality of transceivers further connected to an antenna located outside the building for communicating with and providing macro-cell coverage to cellular telephones located outside the building, and the plurality of transceivers further connected to the shared antenna located within the building for communicating with and providing macro-cell coverage to cellular telephones located within the building.

4. The apparatus recited in claim 1, wherein the means for extending cellular telephone service from the macro-cell located outside the building to inside the building comprises, a repeater communicating with a cellular telephone network via a remotely located base station, the repeater connected to the shared antenna located within the building for communicating with and providing macro-cell coverage to cellular telephones located within the building.

5. An apparatus for transmitting to cellular telephones located inside and outside a building comprising:

a first set of transceivers comprised of one or more transceivers connected to a cellular telephone network, each transceiver in the first set generating a transmitter output signal associated with a macro-cell located outside the building;

a second set of transceivers comprised of one or more transceivers connected to the cellular telephone network, each transceiver in the second set generating a transmitter output signal associated with a pico-cell located within the building;

a first combiner for combining the transmitter output signals from the first set to produce a first combined output signal;

a splitter for replicating the first combined output signal and creating a first and second copy of the first combined output signal, the first copy of the signal output to an antenna for providing macro-cell coverage outside the building; and

a second combiner for combining the transmitter output signals from the second set and the second copy of the first combined output signal to produce a second combined output signal output to an antenna located within the building for providing pico-cell coverage within the building and extending the macro-cell coverage into the building.

6. An apparatus for receiving transmissions from cellular telephones located inside and outside a building comprising:

an antenna located outside the building for receiving macro-cell transmissions from cellular telephones located outside the building;

an antenna located within the building for receiving macro-cell and pico-cell transmissions from cellular telephones located inside the building;

a combiner for combining the received transmissions from the antenna located outside the building and the received transmissions from the antenna located within the building, the combiner producing a combined output signal;

a splitter for replicating the combined output signal and creating a first and second copy of the combined output signal;

a first set of transceivers comprised of one or more transceivers connected to a cellular telephone network, the first set of transceivers receiving macro-cell transmissions from cellular telephones located outside and inside the building via the first copy of the combined output signal; and

a second set of transceivers comprised of one or more transceivers connected to a cellular telephone network, the second set of transceivers receiving pico-cell transmissions from cellular telephones located within the building via the second copy of the combined output signal.

7. An apparatus for transmitting to cellular telephones located inside a building comprising:

a repeater connected to a cellular telephone network via a remotely located base station, the repeater generating an output signal associated with a macro-cell located outside the building;

a set of transceivers comprised of one or more transceivers connected to a cellular telephone network, each transceiver in the set generating an output signal associated with a pico-cell located within the building; and

a combiner for combining the output signals from the repeater and set of transceivers to produce a combined output signal output to an antenna located within the building for providing pico-cell coverage within the building and extending the macro-cell coverage into the building.

8. An apparatus for receiving transmissions from cellular telephones located inside a building comprising:

an antenna located within the building for receiving macro-cell and pico-cell transmissions from cellular telephones located inside the building;

a splitter for reproducing the received transmissions from the antenna and creating a first and second copy of the received transmission;

a repeater connected to a cellular telephone network via a remotely located base station, the repeater receiving macro-cell transmissions from cellular telephones located inside the building via the first copy of the received transmissions; and

a set of transceivers comprised of one or more transceivers connected to a cellular telephone network, the set of transceivers receiving pico-cell transmissions from cellular telephones located within the building via the second copy of the combined output signal.

9. A method for transmitting to cellular telephones located inside and outside a building comprising the steps of:

combining transmitter outputs from each transceiver in a first set of transceivers associated with a macro-cell to produce a first combined output signal;

replicating the first combined output signal to produce a first and second copy of the first combined output signal;

transmitting the first copy of the first combined output signal to cellular telephones located outside the building associated with the macro-cell on an antenna located outside the building;

combining transmitter outputs from each transceiver in a second set of transceivers associated with a pico-cell and the second copy of the first combined output signal to produce a second combined output signal; and

transmitting the second combined output signal to cellular telephones located inside the building associated with the pico-cell and the macro-cell on an antenna located inside the building.

10. A method for receiving transmissions from cellular telephones located inside and outside a building comprising the steps of:

receiving macro-cell transmissions from cellular telephones located outside the building on an antenna located outside the building;

receiving macro-cell and pico-cell transmissions from cellular telephones located inside the building on an antenna located inside the building;

combining macro-cell transmissions received on the antenna located outside the building with macro-cell and pico-cell transmissions received on the antenna located inside the building to produce a combined output signal; and

replicating the combined output signal to produce a copy of the combined output signal for each transceiver in a first set of transceivers associated with the macro-cell and for each transceiver in a second set of transceivers associated with the pico-cell.