Dynamic control of cellular radio communication system resources

• US 6,507,569 B1
• Filed: 04/16/1999
• Issued: 01/14/2003
• Est. Priority Date: 10/18/1996
• Status: Expired due to Term

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Crichton, Paul
• Primary Examiner(s): Le, Thanh Cong
• Assistant Examiner(s): Gantt, Alan T.
• Application Number:
  US09/284,676
• Time in Patent Office: 1,369 Days
• Field of Search: 370/329, 370/330, 370/341, 370/431, 370/468, 455/63, 455/67.3
• US Class Current: 370/329
• CPC Class Codes: H04W 16/04 Traffic adaptive resource partitioning
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 4/24 Accounting or billing
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS
• CPC Class Codes: H04W 8/18 Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

Abstract

A method of optimising the operation of a cellular radio communication system in which the demands made by users of the system are monitored and resources are allocated to the users accordingly.

Claims

1. A method of optimizing the operation of a cellular radio communication system, comprising:

monitoring the positions of services used and frequency of calls made by user stations within cells in a region of the cellular radio communication;

establishing a dynamic user profile data base related thereto;

varying the characteristics of the cells in the said region of the radio communication system in response to data derived from the user profile data base so as to allocate resources to the cells as a function of the demands made by the user stations within the cells;

monitoring the level of interference within the cells in the said region of the cellular radio communication system;

producing an interference probability distribution function related thereto; and

routing calls to avoid those cells in which the level of interference is highest.

2. A method according to claim 1 further comprising:

producing a location probability distribution function for specific users of the cellular radio communication system; and

initially routing incoming calls for those users of the system to cells where the probability distribution function indicates they are most likely to be.

3. A method according to claim 2 wherein handover sequences for the cells are recorded in the user profile data base, the method further comprising initiating handover simultaneously with the reception by a base transceiver station of the cells concerned of a request for service involving a specified user of the system in those cells

4. A method according to claim 1 further comprising determining from data held in the user profile data base the optimum allocation of radio frequency and size of cell for individual users of the cellular radio communication system.

5. A method according to claim 4 further comprising modifying a size of a particular cell of the system in response to information derived from the user profile data store relating to a movement of the specified user of the system associated with that cell.

6. A method according to claim 5 further comprising determining when a particular cell is not in use and reducing the power output of the base transceiver unit of that cell during the period for which the cell is unused.

12. A cellular radio communication system according to claim 1 wherein a number of contiguous personal cells are encompassed by an overlay cell and communications between the central transceiver station the cells with the overlay cell are passed through the overlay cell.

13. A cellular radio communication system according to claim 12 further comprising a facility for amalgamating personal cells to form a group cell.

7. A cellular radio communication system comprising:

a base service transceiver station, serving a region of the cellular radio communication system;

a central transceiver station in communication with the base service station;

a plurality of subsidiary transceiver units in communication with the central transceiver station;

a user station in communication with an associated subsidiary transceiver to form a cell of the cellular radio communication system; and

wherein the base service transceiver station comprises a central processing unit adapted to and frequency of calls made by the user stations in the said region of the cellular radio communication system at regular intervals, store data relating thereto in a user profile data store and produce operating signals adapted to cause the central transceiver station to vary the characteristics of the cells in the said region of the cellular radio communication system in response to the operating signals so as to allocate resources to the cells as a function of the demands made by the user stations within the cells of the cellular radio communication system, monitor the level of interference within the cells in the said region of the cellular radio communication system, produce an interference probability distribution function related thereto; and

route calls to avoid those cells in which the level of interference is highest.

8. A cellular radio communication system according to claim 7 wherein the operating signals produced by the base service transceiver station cause the central transceiver station to vary the size of/and the number of traffic channels available within the cells of the region of the cellular radio communication system.

9. A cellular radio communication system according to claim 7 wherein the central control transceiver station communicates with the subsidiary transceiver units via radio frequency links.

10. A cellular radio communication system according to claim 7 wherein the central transceiver station is linked to the subsidiary transceiver units by land lines.

11. A cellular radio communication system according to claim 7 wherein a single user station is associated with a subsidiary transceiver unit to form a personal cell within the radio communication system.