Filing Information

Inventor(s)	Thierry Billon ·
Assignee(s)	None listed in document.  View assignee updates
Attorney/Agent(s)	Lee, Mann, Smith, McWilliams, Sweeney & Ohlson ·
Primary Examiner	Thanh Cong Le ·
Assistant Examiner	Lana Le ·
Application Number	US9486922
Filing date	07/13/2000
PCT 371 date	07/13/2000
Issue date	12/03/2002
Predicted expiration date	07/13/2020
U.S. Classifications	455/226.1  · 455/63  · 455/446  · 455/671  ·
International Classifications	--
Kind Code	B1
International Classifications	4552261 · 4552262 · 455 671 · 4552263 · 455446 · 455447 · 455450 · 455449 · 455 63 ·
PCT Application Number	WO20PCTFR9801951 - 09/11/1998
PCT Publication Number	WO199914968 - 03/25/1999
Foreign Priority	FR9711467 - 09/12/1997 ·

Patent Family

Abstract

A system for provisionally estimating the carrier-to-interference ratio of a terminal in a cellular mobile radio network which transmits sets of primary frequencies and sets of secondary frequencies and in which the rate of re-use of the sets of secondary frequencies is higher than that of the sets of primary frequencies. The system knows the level received by said terminal from a local cell (A1) to which it is connected. It also knows the levels (LB2, LC3, LD2, LE1, LG2, LF1) received by said terminal from adjoining cells (B2, C3, D2, E1, G2, F1). It selects a reference cell (B2) from said local cell and said adjoining cells, produces a potential noise by calculating the sum (N1) of the levels (LD2, LG2) received from the cells (D2, G2) using the same secondary frequencies as said reference cell (B2), and supplies said estimate in the reference cell (B2) by dividing the level received from said reference cell by the potential noise.

Independent Claims | See all claims (9)

1. 1. A system for provisionally estimating the carrier-to-interference ratio of a terminal in a cellular mobile radio network which transmits sets of primary frequencies and sets of secondary frequencies and in which the rate of re-use of the sets of secondary frequencies is higher than that of the sets of primary frequencies and each cell is identified by a primary color (A, B, C, . . . , G) and a secondary color (1, 2, 3) respectively corresponding to the set of primary frequencies and to the set of secondary frequencies which are allocated to it, the system being characterized in that, knowing the level received by said terminal from a local cell (1) to which it is connected and knowing the levels (LB2, LC3, LD2, LE1, LG2, LF1) received by said terminal from adjoining cells (B2, C3, D2, E1, G2, F1) of different primary color to that of said local cell (A1), the system selects a reference cell (B2) from said local cell and said adjoining cells, produces a potential noise including the sum (N1) of said levels (LD2, LG2) received from the cells (D2, G2) of the same secondary color as said reference cell (B2) without taking account of the level (LB2) received from that reference cell (B2), determines a noise level by summing said potential noise (N1) and a noise floor (P) subject to a weighting coefficient and supplies said provisional estimate of the carrier-to-interference ratio of the terminal in said reference cell (B2) by dividing the level received from that reference cell by said noise level.