Handover techniques
First Claim
1. A cellular radio system for operation over an area covered by a plurality of cells, in any of which cells calls may be associated with a mobile equipment, wherein for interference reduction purposes each cell is allocated a respective control channel which is applicable when the equipment is stationary in that cell, wherein a number of cells which are adjacent to one another constitute a group of cells, there being at least one said group of cells, and including means to monitor the movement of the equipment and means whereby in the event of one said call associated with the mobile equipment and when the mobile equipment is moving at speed through said group of cells, the adjacent cells constituting the one said group of cells are allocated a common control channel whereby handover of the mobile equipment moving between the adjacent cells constituting the one said group of cells is facilitated.
4 Assignments
0 Petitions
Accused Products
Abstract
In a cellular radio system including a plurality of cells (e.g. cell sectors or micro cells) (4, 5, 8, 9, 10, 11) each normally using a respective channel for interference reduction purposes, a number of the cells are arranged in groups (6) and in the event of a cell associated with equipment moving within a group (6), all cells (4, 5, 8, 9, 10, 11) of that group use a common channel whereby to facilitate handover between them.
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Citations
13 Claims
- 1. A cellular radio system for operation over an area covered by a plurality of cells, in any of which cells calls may be associated with a mobile equipment, wherein for interference reduction purposes each cell is allocated a respective control channel which is applicable when the equipment is stationary in that cell, wherein a number of cells which are adjacent to one another constitute a group of cells, there being at least one said group of cells, and including means to monitor the movement of the equipment and means whereby in the event of one said call associated with the mobile equipment and when the mobile equipment is moving at speed through said group of cells, the adjacent cells constituting the one said group of cells are allocated a common control channel whereby handover of the mobile equipment moving between the adjacent cells constituting the one said group of cells is facilitated.
- 8. A handover technique for use with a cellular radio system operating over an area covered by a plurality of cells, in any of which cells calls can be associated with a mobile equipment, which radio system is such that for interference reduction purposes each cell is allocated a respective control channel which is applicable when the equipment is stationary in that cell, and such that a number of said cells which are adjacent to one another constitutes a group of cells, there being at least one said group of cells, the handover technique including the steps of monitoring the movement of the equipment in order to determine when handover between the cells of one said group of cells is required in the event of a said call associated with the mobile equipment and when the mobile equipment is moving at speed through the one said group of cells, and in that event allocating a common control channel to all of the adjacent cells of the one said group of cells whereby to facilitate said handover.
Specification