Layered wireless communication system and method

• US 6,081,719 A
• Filed: 08/19/1998
• Issued: 06/27/2000
• Est. Priority Date: 08/19/1998
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Gilliland, Dennis W., Bielat, David J., Picha, Dean M.
• Primary Examiner(s): CANGIALOSI, SALVATORE A
• Application Number:
  US09/136,238
• Time in Patent Office: 678 Days
• Field of Search: 455/444, 455/448, 455/449, 455/456, 455/445, 455/458, 455/434, 455/453
• US Class Current: 455/449
• CPC Class Codes: H04W 16/32 Hierarchical cell structures
• CPC Class Codes: H04W 36/04 Reselecting a cell layer in multi-layered cells

Abstract

A layered wireless communication system (100) uses "coverage zones, i.e., coverage cells (102-108) and traffic zones," i.e., traffic cells (110-122). The traffic cells (110-122) do not require a broadcast channel carrier. In accordance with the present invention, when a call request is received (202) within one of coverage cells (102-108), either originated by a mobile or terminating with a mobile, a determination is made (208) as to whether the call can be handled by one of the traffic channel carriers within a traffic cell (110-122). If the call can be served by one of these traffic channel carriers, an assignment of the particular traffic channel carrier to service the call is made (214). Otherwise, the call is assigned a traffic channel carrier assigned to one of coverage cells (102-108).

Claims

1. A layered wireless communication system comprising:

a plurality of coverage cells, each coverage cell including a broadcast channel for directing traffic channels assignment in a plurality of traffic cells

wherein each traffic cell having only traffic channels and excluding broadcast channels, the plurality of traffic cells overlapping the plurality of coverage cells and at least one of the plurality of traffic cells overlapping at least two of the plurality of coverage cells, and whereby a call request is received by one of the plurality of coverage cells via an associated broadcast channel which directs a traffic channel assignment selected from one of the plurality of traffic cells when a mobile is located within one of the plurality of traffic cells.

2. The layered wireless communication system of claim 1 wherein the traffic channel is assigned from one of the plurality of coverage cells when the mobile is not located within one of the traffic cells.

3. The layered wireless communication system of claim 1, the traffic channel selected from a plurality of traffic channel resources.

4. The layered wireless communication system of claim 3, a traffic carrier is simultaneously used in a first of the plurality of coverage cells and a second of the plurality of coverage cells.

5. The layered wireless communication system of claim 1, comprising a mobile location device arranged to detect a location of a mobile within the layered wireless communication system and with respect to the plurality of coverage cells and the plurality of traffic cells.

6. The layered wireless communication system of claim 1, the location device comprising:

a location matrix, the location matrix providing an upper service bound and a lower service bound of a coverage cell relative to each traffic cell.

7. The layered wireless communication system of claim 1, each of the plurality of coverage cells having a coverage cell transmission power and each of the plurality of traffic cells having a traffic cell transmission power, each coverage cell transmission power exceeding each traffic cell transmission power.

8. The layered wireless communication system of claim 1, each of the plurality of coverage cells having a coverage cell area, and each of the plurality of traffic cells having a traffic cell area, each coverage cell area being greater than each traffic cell area.

9. The layered wireless communication system of claim 8, comprising an aggregate coverage area including the coverage cell area of each of the plurality of coverage cells.