EP0838964A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method for self-calibration of a wireless communication system
Assignee: AT&T Wireless Services Inc
•
Filing: 1997-10-22
•
Granted: —
•
Expires: 2017-10-22
Abstract
Abstract Self RF engineering is made possible for a wireless communication system by adding to the self-configuration capability the ability to set autonomously the power levels of the system base stations. The same data is employed as in self configuration. A further improvement for systems using the IS 136 Air Interface Standard consists of the capability to collect the required data through the functionalities of the MAHO/MACA (Mobile Assisted Hand Off/Mobile Assisted Channel Assignment). Improved system-initialization procedures are presented.
Inventors
- 👤 Mathilde Benveniste
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 19:15
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/30; H04W52/36; H04W52/367; H04W16/00; H04W16/02; H04W16/04; H04W16/10; H04W24/00; H04W52/362; H04W52/38; H04W52/50; H04W16/06; H04W16/08; H04W16/24; H04W16/32; H04W24/08; H04W24/10; H04W28/00; H04W28/02; H04W28/06; H04W28/16; H04W52/06; H04W52/08; H04W72/00; H04W72/50; H04W72/54; H04W72/541; H04W84/00; H04W84/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
69 words
In a wireless -communications system having service areas partitioned
into a plurality of cells, wherein a set of communications channels are available for
allocation among cells, an improvement in said system, CHARACTERIZED BY: means for automatically setting the RF transmit power levels of base
stations associated with the cells based on signal strength and interference
measurements between mobiles and base stations, wherein said measurements are
collected by the system.
Claim 2
Dependent Claim
38 words
The system of claim 1 further including: means for setting the base station transmit power at minimum power
levels sufficient to provide adequate signal strength to the serving area of the base
station and meet operator specified requirements.
Claim 3
Dependent Claim
32 words
The system of claim 1 further including: means for employing the IS 136 Air Interface Standard; and means for collecting measurements through the use of MAHO/MACA
functionalities of the Air Interface Standard.
Claim 4
Dependent Claim
59 words
In a wireless communications system having service areas partitioned
into a plurality of cells and employing the IS 136 Air Interface Standard, wherein
serving signal and interference measurements collected by the system for use in
autonomous channel assignment, said system, CHARACTERIZED BY: means for collecting said measurements through the use of the
MAHO/MACA functionalities of the Air Interface System.
Claim 5
Dependent Claim
25 words
The wireless communications system of claim 4, further including: means for employing said measurements to automatically set RF
transmit power levels of the base stations.
Claim 6
Dependent Claim
80 words
In a wireless communications system having service areas partitioned
into a plurality of cells, wherein a set of communications channels are available for
allocation among said cells and efficient operation of the system relies on parameters
established based on data collected during system operation, said system, CHARACTERIZED BY: means for initiating system operation by specifying crude estimates of
said parameters; means for acquiring said data during system operation; and means for improving estimates of said parameters using said acquired
data.
Claim 7
Dependent Claim
19 words
The system of claim 6, including: means for using said parameters for determining the admissibility of a
channel assignment.
Claim 8
Dependent Claim
22 words
The system of claim 6, including: means for using said parameters for determining RF transmit levels of
base stations of the system.
Claim 9
Independent Claim
113 words
A method of setting the power levels of the base stations of a wireless
communications system, CHARACTERIZED BY the steps of: acquiring data on signal attenuations between mobiles and base stations
for a representative set of mobile locations; and setting initial RF power levels at minimal allowable values; and assigning each of said mobile locations to the base station delivering the
strongest signal; and selecting the mobile location with lowest received signal to leave
uncovered if coverage criteria can be met, or to yield the base station whose RF
power is increased by an increment; which step is repeated until the received signal at all said mobile locations meets the signal quality
requirement.
Claim 10
Dependent Claim
80 words
In a wireless communications system having service areas partitioned
into a plurality of cells wherein a set of communications channels are available for
allocation among said cells and the administration of channel assignments requires
the autonomous determination of channel assignment admissibility criteria based on
data collected during system operation, said system, CHARACTERIZED BY: means for initiating system operation by determining admissibility of a
channel; means for assignment of channels through the use of peer (base-station
to base-station) signal strength measurements.
Claim 11
Dependent Claim
113 words
In a wireless communications system having service areas partitioned
into a plurality of cells wherein a set of communications channels are available for
allocation among the cells and efficient operation of the system relies on parameters
estimated based on data consisting of signal strength and interference measurements
between base stations and mobiles, wherein said data is collected during system
operation, said system, CHARACTERIZED BY: means for initializing said parameters by specifying crude estimates of
said parameters; means for acquiring said data by moving operator-controlled mobiles,
engaged is calls, about the system serving area; means for improving estimates of said parameters using the acquired
data; and means for admitting customer mobiles into the system.
Claim 12
Dependent Claim
15 words
The system of claim 11 wherein said parameters determine the
admissibility of a channel assignment.
Claim 13
Dependent Claim
16 words
The system of claim 11 wherein said parameters determine RF
transmit levels of the base stations.
Claim 14
Dependent Claim
116 words
In a wireless communication system employing the IS 136 Air
Interface Standard and having service areas partitioned into a plurality of cells,
wherein a set of communications channels are available for allocation among said
cells and efficient operation of the system relies on parameters estimated based on
data consisting of signal strength and interference measurements between base
stations and mobiles, wherein said data is collected during system operation, said
system, CHARACTERIZED BY: means for initializing said parameters by specifying crude estimates of
said parameters; means for acquiring said data by moving operator-controlled mobiles
about the system serving area; means for improving estimates of said parameters using the acquired
data; and admitting customer mobiles into the system.
Claim 15
Dependent Claim
17 words
The wireless communications system of claim 14 wherein said
parameters determine the admissibility of a channel assignment.
Claim 16
Dependent Claim
20 words
The wireless communications system of claim 14 wherein said
parameters determine the Rf transmit power levels of the base stations.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.