System and method for extending a wireless communication coverage area of a cellular base transceiver station (BTS)

• US 8,842,525 B2
• Filed: 10/08/2009
• Issued: 09/23/2014
• Est. Priority Date: 10/08/2009
• Status: Active Grant

• Current Assignee: Clearwire Ip Holdings LLC (Deutsche Telekom AG)
• Original Assignee: Clearwire Ip Holdings LLC (Deutsche Telekom AG)
• Inventors: Kim, John Yongchae, Martire, Joe, Tran, Thuy Thomas
• Primary Examiner(s): Moore, Ian
• Assistant Examiner(s): WILLIAMS, JENEE LAUREN
• Application Number:
  US12/575,691
• Publication Number:
  US 20110085492A1
• Time in Patent Office: 1,811 Days
• Field of Search: 370/315, 370/317, 370/328, 370/329, 370/331, 370/338, 370/352, 455/7, 455/422.1, 455/434, 455/435.1, 455/443, 455/444, 455/445, 455/446, 455/447, 455/448
• US Class Current: 370/228
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

The present document describes a system and method for extending a wireless communication coverage area of a cellular wireless base station transceiver (BTS) to enable control signaling and identification of mobile stations not currently within a coverage area of an existing beamform antenna pattern of the BTS, for example. A cellular BTS may scan through dead zones of coverage areas provided by the BTS to identify mobile stations not within the coverage area of the BTS, but within a possible service area of the BTS. In addition, the BTS may receive a relaying control signal from a mobile station located within the coverage area of the BTS, and the signal will indicate a location of another mobile station not within the coverage area of the BTS but within the service area of the BTS. In either example, the BTS may attempt to provide a coverage area to the mobile station located in the control signaling dead zone, for example.

Claims

1. A method of extending a wireless communication coverage area of a cellular base transceiver station (BTS), comprising:

providing a beamformed coverage area pattern, the beamformed coverage area pattern indicating geographic areas over which control component communication and data traffic communication between a mobile station and the BTS is configured to occur, wherein the control component communication includes network synchronization signaling between the BTS and the mobile station for entry into a network;

while providing the beamformed coverage area pattern, the BTS scanning through areas by providing a temporary coverage area in the areas to which the BTS is configured to provide a coverage area and that are not included within the beamformed coverage area pattern, wherein the temporary coverage area results in a control beam pattern to provide a control component communication coverage area in a manner opposite of where the control component communication coverage is provided within the beamformed coverage area pattern;

identifying a second mobile station located within one of the areas to which the BTS is configured to provide the coverage area and that is not included within the beamformed coverage area pattern, wherein the second mobile station resides in the temporary coverage area that enables the control component communication; and

extending a beamformed coverage area to the second mobile station to enable control component communication and data traffic communication between the second mobile station and the BTS.

2. The method of claim 1, wherein scanning comprises the BTS uniformly broadcasting control component information.

3. The method of claim 1, wherein scanning comprises providing temporary coverage areas in a sequential manner to rotate a temporary coverage area through previous areas to which the BTS is configured to provide the coverage area and that are not included within the beamformed coverage area pattern.

4. The method of claim 1, further comprising performing the step of scanning periodically.

5. The method of claim 1, wherein identifying a mobile station within one of the areas to which the BTS is configured to provide the coverage area and that is not included within the beamformed coverage area pattern comprises receiving a network synchronization signal from the second mobile station.

6. The method of claim 1, wherein extending the beamformed coverage area to the second mobile station comprises providing a new beamformed coverage area pattern that enables control component communication and data traffic communication between the second mobile station and the BTS.

7. The method of claim 1, wherein extending the beamformed coverage area to the second mobile station comprises enlarging the beamformed coverage area pattern to a location of the second mobile station.

8. A non-transitory computer readable medium having stored therein instructions executable by a computing device to cause the computing device to perform the functions of:

providing a beamformed coverage area pattern, the beamformed coverage area pattern indicating geographic areas over which control component communication and data traffic communication between a mobile station and a cellular base transceiver station (BTS) is configured to occur, wherein the control component communication includes network synchronization signaling between the BTS and the mobile station for entry into a network;

while providing the beamformed coverage area pattern, causing the BTS to scan through areas by providing a temporary coverage area in the areas to which the BTS is configured to provide a coverage area and that are not included within the beamformed coverage area pattern, wherein the temporary coverage area results in a control beam pattern to provide a control component communication coverage area in a manner opposite of where the control component communication coverage is provided within the beamformed coverage area pattern;

identifying a second mobile station located within one of the areas to which the BTS is configured to provide the coverage area and that is not included within the beamformed coverage area pattern, wherein the second mobile station resides in the temporary coverage area that enables the control component communication; and

extending a beamformed coverage area to the second mobile station to enable control component communication and data traffic communication between the second mobile station and the BTS.

9. The non-transitory computer readable medium of claim 8, wherein the function of identifying the second mobile station located within one of the areas to which the BTS is configured to provide the coverage area and that is not included within the beamformed coverage area pattern further comprises:

receiving from a first mobile station located within the beamformed coverage area pattern, information broadcast by the second mobile station not located within the beamformed coverage area pattern indicating a location of the second mobile station.

10. The non-transitory computer readable medium of claim 9, wherein the functions further comprise:

making a determination of whether the second mobile station is located within a service area of the BTS; and

based on the determination, extending a beamformed coverage area to the second mobile station.