Point to multipoint cell plan and migration
The present invention relates to cell plans and cell plan changes in point to multipoint systems (PMP). A cell plan arrangement is provided comprising cells having four 90° sectors to which individual sector at least one of four orthogonal channels, such as channels distinguished by two frequencies and two polarisations, are allocated. A method is furthermore provided allowing gradual sector-by-sector migration into a 45° sector cell plan. The cell plan offers advantageous carrier to interference ration (C/I) improvements.
Telefonaktiebolaget L M Ericsson (Publ)
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Martin Nils Anna Barbro Ulrika
Johansson Engstrom