Method and apparatus to facilitate preventing interference as between base stations sharing carrier resources

• US 8,983,388 B2
• Filed: 08/13/2009
• Issued: 03/17/2015
• Est. Priority Date: 09/30/2008
• Status: Expired due to Fees

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Inventors: Han, Guang, Agrawal, Rajeev, Bedekar, Anand S.
• Primary Examiner(s): Pan, Yuwen
• Assistant Examiner(s): AYOTUNDE, AYODEJI O
• Application Number:
  US12/540,414
• Publication Number:
  US 20100081388A1
• Time in Patent Office: 2,042 Days
• Field of Search: 455/67.11, 455/63.1, 455/501, 455/59, 455/62, 455/63.3, 455/443, 455/450, 455/509, 370/329, 370/431
• US Class Current: 455/63.1
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/27 between access points

Abstract

A first base station communicates (102) with a second base station (wherein an ongoing communication cannot be handed over from the first base station to the second base station and wherein the first and second base station each employ, at least in part, a same set of carrier resources) to prevent interference by usage of the second base station with a user of the first base station. By one approach, this activity can be based, at least in part, upon receipt (101) of a message from an end user platform indicating that a carrier resource that is presently being used by the end user platform is being interfered with by the second base station. By another approach, this activity can take place prior to any actual such interference.

Claims

1. A method for use in preventing interference as between a first base station and a second base station, wherein an ongoing communication cannot be handed over from the first base station to the second base station and wherein the first and second base station each employ, at least in part, a same set of carrier resources, the method comprising:

at the first base station;

prior to any actual interference between the first base station and the second base station, communicating to the second base station at least one identified carrier resource that is not to be used by the second base station to thereby prevent interference by usage of the second base station with a user of the at least one identified carrier resource of the first base station in the ongoing communication; and

releasing the second base station from not using the at least one identified carrier resource when at least a predetermined amount of time passes without any reported interference from the second base station.

2. The method of claim 1 wherein the communicating comprises effecting the communication via at least one of:

a direct communication link between the first base station and the second base station;

an indirect communication link between the first base station and the second base station.

3. The method of claim 1 wherein the communicating comprises, at least in part:

receiving from the second base station information regarding carrier resource assignments that the second base station has received from yet other base stations;

using this information regarding carrier resource assignments when providing instructions to the second base station regarding carrier resources to avoid the interference.

8. The method of claim 1 wherein the first base station is a wide-area base station and the second base station is a small-area base station.

4. A base station comprising:

a plurality of transceivers configured to employ carrier resources in support of wireless communications for wireless end users;

a controller operably coupled to the plurality of transceivers and configured to prevent interference as between the base station and a second base station by, prior to any actual interference between the first base station and the second base station, communicating to the second base station at least one identified carrier resource that is not to be used by the second base station to thereby prevent interference by usage of the second base station with a user of the at least one identified carrier resource of the base station in the ongoing communication and to release the second base station from not using the at least one identified carrier resource when at least a predetermined amount of time passes without any reported interference from the second base station;

wherein an ongoing communication cannot be handed over from the first base station to the second base station and wherein the base station and the second base station each employ, at least in part, a same set of carrier resources.

5. The base station of claim 4 wherein the controller is configured to effect the communicating via at least one of:

a direct communication link between the base station and the second base station;

an indirect communication link between the first base station and the second base station.

6. A method for use in preventing interference as between a first base station and a second base station, wherein an ongoing communication cannot be handed over from the first base station to the second base station and wherein the first and second base station each employ, at least in part, a same set of carrier resources, the method comprising:

at the second base station;

receiving, from the first base station prior to any actual interference between the first base station and the second base station, a message comprising identification of at least one carrier resource that is not to be used by the second base station to prevent interference by usage of the second base station with a user of the at least one carrier resource of the first base station in the ongoing communication; and

receiving, from the first base station, a release from not using the at least one identified carrier resource when at least a predetermined amount of time passes without the first base receiving interference from the second base station.

7. The method of claim 6 further comprising:

determining whether the message has instructional content that conflicts with a protected status that the second base station is administratively permitted to accord to some, but not all, of its carrier resources.