Radio communication system

• US 6,064,661 A
• Filed: 07/31/1997
• Issued: 05/16/2000
• Est. Priority Date: 12/05/1995
• Status: Expired due to Term

• Current Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Benn, Howard Peter
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): VANDERPUYE, KENNETH N
• Application Number:
  US08/875,650
• Time in Patent Office: 1,020 Days
• Field of Search: 370/329, 370/330, 370/331, 370/328, 370/332, 370/333, 370/321, 370/336, 370/347, 455/447, 455/436, 455/437, 455/439, 455/442, 455/443, 455/444
• US Class Current: 370/329
• CPC Class Codes: H04W 16/32 Hierarchical cell structures
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A radio communications system that utilizes multiple cells to provide radio communication services to a plurality of mobile stations. In the cells that service high concentrations of mobile stations within a very small geographic area, such as large office buildings, there are provided a plurality of radio frequency capsules within the geographic area serviced by the cell. In addition to having a base site for providing Broadcast Control Channel(BCCH), the cell contains multiple RF capsules for transmitting and receiving traffic channels as well as receiving Random Access Channel(RACH) bursts from a plurality of mobile stations in a portion of the geographic area serviced by the base site. The RF capsules do not provide a BCCH, rather the BCCH is provided by a microcell transceiver that is servicing the particular cell.

Claims

1. A radio communication system comprising:

a first base station for providing radio communication services to a plurality of mobile stations located within a first geographic area, said first base station transmitting a broadcast control channel (BCCH) for said first geographic area;

at least a first capsule located within said first geographic area for transmitting traffic channels and receiving traffic channels and random access channels (RACH) to and from said plurality of mobile stations, said at least first capsule for providing coverage over at least a first portion of said first geographic area and configured to receive the RACH from the first of said plurality of mobile stations at a quality level; and

a controller comprising

first means for monitoring a communication quality of a first traffic channel, the first traffic channel having at least a first frequency and a first timeslot, second means for monitoring the communication quality of the first traffic channel through a second capsule, means, responsive to the first and second means for monitoring, for switching assignment of the traffic channel from the first capsule to the second capsule while maintaining the first frequency and the first timeslot of the traffic channel, and

a matrix indicating, using said quality level, a propagation loss between said at least first capsule and the first of said plurality of mobile stations, the controller allocating said at least first capsule to the first of said plurality of mobile stations.

2. The radio communication system in accordance with claim 1 wherein the second capsule is located within said first geographic area for providing coverage over at least a second portion of said first geographic area, and wherein said first portion of said first geographic area and said second portion of said first geographic area may overlap significantly.

3. The radio communication system in accordance with claim 2 wherein a first mobile station is transmitting on a first radio frequency during a first timeslot and a second mobile station is transmitting on the same first radio frequency and the same first timeslot within the first geographic area.