公开(公告)号：JPH11150755A

公开(公告)日：1999-06-02

申请号：JP22734098

申请日：1998-08-11

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HALEEM MOHAMED ABDUL ,  CHIH-LIN I

IPC: H04W16/10 ,  H04W16/14 ,  H04Q7/36 ,  H04L12/28 ,  H04Q7/22 ,  H04Q7/24 ,  H04Q7/26 ,  H04Q7/30

Abstract: PROBLEM TO BE SOLVED: To avoid mutual interference between short distance wireless application (indoor) and outdoor mobile application by specifying prescribed numbers of channels excluded from the micro cell of a high-order system. SOLUTION: The prescribed numbers of channels are excluded from the micro cell of the high-order system to superimpose on the cell of a low-order system and the channels are allocated to the low-order system or scanned and caught by an independent low-order system. The channels to be excluded are regularly selected so as to satisfy deterministically one of the following conditions: satisfying both of condition group expressions I and II, not satisfying the expression I but satisfying the expression II and not satisfying the expression II but satisfying the expression I. In the expression I, Nmin is the minimum number of channels usable for the low-order system, P is a set consisting of cells which have the possibility to interfere with the low-order system, and Ei is a set consisting of channels to be excluded from a micro cell (i). In the expression II, ϕ is an empty set and Ω is a set consisting of micro cells belonging to a normal cluster.

公开(公告)号：JPH11136746A

公开(公告)日：1999-05-21

申请号：JP22733998

申请日：1998-08-11

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HALEEM MOHAMED ABDUL ,  CHIH-LIN I

IPC: H04W16/10 ,  H04W16/14 ,  H04Q7/36 ,  H04Q7/22 ,  H04Q7/24 ,  H04Q7/26 ,  H04Q7/30

Abstract: PROBLEM TO BE SOLVED: To avoid mutual interference between a short distance wireless application and an outdoor mobile application by diffusively selecting the prescribed number of channels which are removed at random in more than one macro cells of a high-order system with a specified condition. SOLUTION: The prescribed number of channels are removed from more than one macro cells in the high-order system, which are overlapped with more than one cells in a low-order system. Thus, the removed channel is allocated to an autonomous low-order system or the channels are scanned and acquired by the low-order system. The prescribed number of channels which are removed are diffusively selected at random in more than one macro cells of the high- order system so that they statistically satisfy the condition of a formula I and a formula II. In the formula I, P is an arbitrary set constituted of three adjacent cells. In the formula II, ϕ an idle set and Ω is the set constituted of the cells belonging to a normal raster.

公开(公告)号：CA2243790A1

公开(公告)日：1999-02-15

申请号：CA2243790

申请日：1998-07-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： I CHIH-LIN ,  HALEEM MOHAMED ABDUL

IPC: H04W16/10 ,  H04W16/14 ,  H04Q7/36 ,  H04Q7/30

Abstract: Co-Existence Dynamic Channel Assignment (DCA) techniques for overlay macrocellular systems facilitate the coexistence of embedded autonomous underlay microcellular (e.g., indoor) systems. The co-existence of the two syste ms without excessive mutual interference is achieved through systematic determinist ic exclusion of predefined subsets of the universal channel set from the dynamic assignment to the overlay macrocells. The sets of channels are made available to the underlay systems. The exclusion is done with minimal DCA performance degradation . Multiple deterministic exclusions methods are described.

公开(公告)号：CA2243802A1

公开(公告)日：1999-02-15

申请号：CA2243802

申请日：1998-07-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HALEEM MOHAMED ABDUL ,  I CHIH-LIN

IPC: H04W16/10 ,  H04W16/14 ,  H04Q7/36

Abstract: Co-Existence Dynamic Channel Assignment (DCA) techniques for overlay macrocellular systems facilitate the coexistence of embedded autonomous underlay microcellular (e.g., indoor) systems. The Co-existence of the two syste ms without excessive mutual interference is achieved through statistical systematic exclusion of predefined subsets of the universal channel set from the dynamic assignment to the overlay macrocells. The sets of channels are made available to the underlay systems. The exclusion is done with minimal DCA performance degradation . Multiple exclusions methods are described.