Base station interference control using timeslot resource management

• US 7,555,300 B2
• Filed: 12/17/2004
• Issued: 06/30/2009
• Est. Priority Date: 10/25/2002
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Scheinert, Stefan, Bender, Daniel M.
• Primary Examiner(s): Appiah; Charles N
• Assistant Examiner(s): AJIBADE AKONAI, OLUMIDE
• Application Number:
  US11/016,705
• Publication Number:
  US 20080130593A1
• Time in Patent Office: 1,656 Days
• Field of Search: 455/450, 455/451, 455/452.1, 455/452.2, 455/453, 455/454, 455/464, 455/561, 455/522, 455/62, 455/502, 455/509, 455/512, 455/513, 455/514, 455/560, 455/447, 455/63.1, 455/63.3, 455/67.11, 455/67.13, 370/318, 370/321, 370/337, 370/347, 370/326, 370/336, 370/442
• US Class Current: 455/450
• CPC Class Codes: H04W 8/30 Network data restoration; Network data reliability; Network data fault tolerance
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A personal base station configured to connect to the Internet and establish a small area of wireless coverage including means for controlling interference with neighboring personal base stations using a timeslot management mechanism. Timeslot management mechanisms include timeslot interference detection, timeslot power reduction, timeslot allocation, timeslot offset calibration, and timeslot synchronization management that minimizes the number of frequencies required to control inter-cell interference between neighboring personal base stations.

Claims

1. A personal base station configured to connect to the Internet and establish a small area of wireless coverage comprising:

means for controlling interference with neighboring personal base stations using a timeslot management mechanism that is configured to add and delete timeslots by selecting non-interfering timeslots for future service requests, to manage timeslot power by decreasing power on interfering timeslots and increasing power on non-interfering timeslots, and to synchronize timeslots with neighboring personal base stations to avoid interference associated with timeslot frequency drift, wherein interference is tracked using a short-term interference database and a long-term interference database, and further wherein the personal base station at least partially populates the short-term interference database and/or the long-term interference database while operating in a mobile station mode, the short-term interference database to track interference caused by mobile services provided by neighboring personal base stations and the long-term interference database to be populated utilizing information obtained from a Broadcast Control Channel (BCCH) while the personal base station is on mobile station mode by detecting interfering neighboring personal base stations on one or more time slots, wherein cell framing is recalibrated so that interference is detected in a different time slot.

2. A personal base station as claimed in claim 1, wherein the timeslot management mechanism comprises selecting non-interfering timeslots for mobile service requests.

3. A personal base station as claimed in claim 1, wherein the timeslot management mechanism comprises decreasing power on interfering timeslots while increasing power on non-interfering time slots.

4. A personal base station as claimed in claim 1, wherein the timeslot management mechanism comprises offsetting its broadcast control channel to avoid interference with neighboring broadcast control channels.

5. A personal base station as claimed in claim 1, wherein the timeslot management mechanism comprises synchronizing TDMA timeslots with those of neighboring PBS units to avoid interference problems associated with timeslot frequency drift.

6. A personal base station as claimed in claim 1, and further comprising an interference database for tracking-TCH and BCCH timeslot interference with neighboring personal base stations.