Method and apparatus for reliable intersystem handoff in a cdma system

Of communication network, network user (155) (150) and communication via at least base station by the remote unit. The communication network a control through the first mobile switching centre of the first group of base station (102) housing (100) and a control by a second mobile switching centre of the second set of base station (108) housing (112). The network - comprising controlled and uses a first pseudo-random noise code claims a service a first mobile switching centre (100) for providing a base station to the first transfer area of covering (102D). The first transfer area of covering limited by a first system for mobile first switching centre (100) is controlled (102) and a subsystem (108) edge of the mobile switching centre (112) is controlled. The network - comprising controlled by the mobile switching centre (112) and said first and pseudo-random noise code in time displaces the first and second pseudo-random noise code to providing service the channel providing a base station to the first transfer area (108D). The remote unit (155) is into the first transfer area of covering is of the subsystem is or (is of a first transfer area of coverage and subsystem, for providing base station to the remote unit (155) is providing service.