Although they are shown to be related in the film, Reileen Kawahara is not related to Kovacs in the books.
The events of AC:R occur one year after the deaths of Quellchrist Falconer and Takeshi's sister. (08:57 into the movie). AC:R is a prequel to season one of Altered Carbon.
The entirety of this film takes place on the Planet Latimer.