Apparatus and methods for facilitating simulcasting and de-simulcasting in a distributed antenna system

• US 8,688,131 B2
• Filed: 05/01/2012
• Issued: 04/01/2014
• Est. Priority Date: 10/14/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Soriaga, Joseph B., Lott, Christopher Gerard, Attar, Rashid Ahmed Akbar, Salvi, Rohan
• Primary Examiner(s): ROSE, KERRI M
• Application Number:
  US13/461,439
• Publication Number:
  US 20130094454A1
• Time in Patent Office: 700 Days
• Field of Search: 370/252, 370/328, 370/329, 370/343, 370/344, 370/400, 370/401, 370/431, 370463-465, 370/468, 455445-447, 455/450, 455/451
• US Class Current: 455/447
• CPC Class Codes: H04B 7/0691 using subgroups of transmit antennas
• CPC Class Codes: H04B 7/12 Frequency diversity
• CPC Class Codes: H04W 16/12 Fixed resource partitioning
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

An RF connection matrix may include first and second carrier-specific RF connection matrix modules. The first carrier-specific RF connection matrix module can be adapted to route a first downlink transmission to one or more remote antenna units for transmission on a first carrier. The second carrier-specific RF connection matrix module can be adapted to route a second downlink transmission to one or more remote antenna units for transmission on a second carrier. Methods for facilitating simulcasting and de-simulcasting may include receiving a signal associated with a sector ID, which signal includes a first downlink transmission for a first carrier and a second downlink transmission for a second carrier. The first downlink transmission can be routed to one or more remote antenna units for transmission on the first carrier. The second downlink transmission can be routed to one or more remote antenna units for transmission on the second carrier.

Claims

1. An RF connection matrix employable with a distributed antenna system, the RF connection matrix comprising:

a first carrier-specific RF connection matrix module adapted to route a first downlink transmission to one or more remote antenna units for transmission on a first carrier, wherein the first carrier-specific RF connection matrix module is adapted to simulcast the first downlink transmission on the first carrier over a first group of two or more remote antenna units employing a sector identity (ID); and

a second carrier-specific RF connection matrix module adapted to route a second downlink transmission to one or more remote antenna units for transmission on a second carrier, wherein the second carrier-specific RF connection matrix module is adapted to simulcast the second downlink transmission on the second carrier over a second group of two or more remote antenna units employing the sector ID, wherein at least one remote antenna unit of the second group differs from the remote antenna units of the first group.

2. The RF connection matrix of claim 1, further comprising:

at least one carrier separation filter communicatively coupled to the first and second carrier-specific RF connection matrix modules, the at least one carrier separation filter adapted to;

receive a signal associated with a sector identity (ID), the signal including downlink transmissions for at least the first carrier and the second carrier;

convey downlink transmissions for the first carrier to the first carrier-specific RF connection matrix module; and

convey downlink transmissions for the second carrier to the second carrier-specific RF connection matrix module.

3. The RF connection matrix of claim 1, further comprising:

at least one carrier combine filter associated with a respective remote antenna unit and communicatively coupled to the first carrier-specific RF connection matrix module and to the second carrier-specific RF connection matrix module.

4. The RF connection matrix of claim 1, wherein the first carrier-specific RF connection matrix module and the second carrier-specific RF connection matrix module are adapted to simulcast downlink transmissions over the plurality of remote antenna units, wherein at least one of the remote antenna units is positioned so that a coverage area associated with the at least one remote antenna unit is not adjacent to a coverage area associated with any of the other remote antenna units of the plurality.

5. A method operational on an RF connection matrix, comprising:

receiving a signal associated with a sector identity (ID), the signal including a first downlink transmission for transmission on a first carrier and a second downlink transmission for transmission on a second carrier;

routing the first downlink transmission to a first group of two or more remote antenna units for simulcasting the first downlink transmission on the first carrier over the first group of two or more remote antenna units employing the sector identity (ID); and

routing the second downlink transmission to a second group of two or more remote antenna units for simulcasting the second downlink transmission on the second carrier over the second group of two or more remote antenna units employing the sector ID, wherein at least one remote antenna unit of the second group differs from the remote antenna units of the first group.

6. The method of claim 5, further comprising:

conveying the first downlink transmission for the first carrier to a first carrier-specific RF connection matrix module; and

conveying the second downlink transmission for the second carrier to a second carrier-specific RF connection matrix module.

7. The method of claim 5, further comprising:

combining the first downlink transmission and the second downlink transmission into a signal for at least substantially simultaneous transmission by a remote antenna unit.

8. The method of claim 5, wherein routing the first downlink transmission to one or more remote antenna units comprises:

simulcasting the first downlink transmission over a plurality of remote antenna units, wherein at least one of the remote antenna units is positioned so that a coverage area associated with the at least one remote antenna unit is not adjacent to a coverage area associated with any of the other remote antenna units of the plurality.

9. The method of claim 5, wherein routing the second downlink transmission to one or more remote antenna units comprises:

simulcasting the second downlink transmission over a plurality of remote antenna units, wherein at least one of the remote antenna units is positioned so that a coverage area associated with the at least one remote antenna unit is not adjacent to a coverage area associated with any of the other remote antenna units of the plurality.

10. An RF connection matrix, comprising:

means for receiving a signal associated with a sector identity (ID), the signal including a first downlink transmission for transmission on a first carrier and a second downlink transmission for transmission on a second carrier;

means for routing the first downlink transmission to a first group of two or more remote antenna units for simulcasting the first downlink transmission on the first carrier over the first group of two or more remote antenna units employing the sector identity (ID); and

means for routing the second downlink transmission to a second group of two or more remote antenna units for simulcasting the second downlink transmission on the second carrier over the second group of two or more remote antenna units employing the sector ID, wherein at least one remote antenna unit of the second group differs from the remote antenna units of the first group.

11. The RF connection matrix of claim 10, further comprising:

means for conveying the first downlink transmission for the first carrier to a first carrier-specific RF connection matrix module; and

means for conveying the second downlink transmission for the second carrier to a second carrier-specific RF connection matrix module.

12. The RF connection matrix of claim 10, further comprising:

means for combining the first downlink transmission and the second downlink transmission into a signal for at least substantially simultaneous transmission by a remote antenna unit.

13. The RF connection matrix of claim 10, wherein routing the first downlink transmission to one or more remote antenna units comprises:

simulcasting the first downlink transmission over a plurality of remote antenna units, wherein at least one of the remote antenna units is positioned so that a coverage area associated with the at least one remote antenna unit is not adjacent to a coverage area associated with any of the other remote antenna units of the plurality.

14. The RF connection matrix of claim 10, wherein routing the second downlink transmission to one or more remote antenna units comprises:

simulcasting the second downlink transmission over a plurality of remote antenna units, wherein at least one of the remote antenna units is positioned so that a coverage area associated with the at least one remote antenna unit is not adjacent to a coverage area associated with any of the other remote antenna units of the plurality.

15. A non-transitory machine-readable medium comprising instructions operational on an RF connection matrix, which when executed by a processor causes the processor to:

receive a signal associated with a sector identity (ID), the signal including a first downlink transmission for transmission on a first carrier and a second downlink transmission for transmission on a second carrier;

route the first downlink transmission to a first group of two or more remote antenna units for simulcasting the first downlink transmission on the first carrier over the first group of two or more remote antenna units employing the sector identity (ID); and

route the second downlink transmission to a second group of two or more remote antenna units for simulcasting the second downlink transmission on the second carrier over the second group of two or more remote antenna units employing the sector ID, wherein at least one remote antenna unit of the second group differs from the remote antenna units of the first group.

16. The non-transitory machine-readable medium of claim 15, further comprising instructions operational on an RF connection matrix to cause the processor to:

convey the first downlink transmission for the first carrier to a first carrier-specific RF connection matrix module; and

convey the second downlink transmission for the second carrier to a second carrier-specific RF connection matrix module.

17. The non-transitory machine-readable medium of claim 15, further comprising instructions operational on an RF connection matrix to cause the processor to:

combine the first downlink transmission and the second downlink transmission into a signal for at least substantially simultaneous transmission by a remote antenna unit.