초록 ▼

The present invention relates to a method for co-ordination of uplink scrambling codes between different radio network controllers (21) and the assignment of such codes to radio connections (27) of user equipments (26) in a code division multiple access (CDMA) communication system. The invention als

The present invention relates to a method for co-ordination of uplink scrambling codes between different radio network controllers (21) and the assignment of such codes to radio connections (27) of user equipments (26) in a code division multiple access (CDMA) communication system. The invention also relates to methods for creating a starting vector used to generate said scrambling codes. According to the invention, a unique subset of scrambling codes is dedicated to each radio network controller (21) by assigning an offset vector (212). Initial starting vectors (215) are composed by concatenating the offset vector (212) and the binary representation of a determining value (216) within the size range of the dedicated code subset. An idle starting vector is selected, e.g., by using a one-dimensional array (217) containing a status bit for each scrambling code and by using the array index (213) as determining value (216).

대표청구항 ▼

1. A method for assigning a unique scrambling code sequence to user equipment within the coverage area of one of a plurality of radio base station in a CDMA-based communication system, in which each radio base station is communicating with one of a plurality of radio network controllers,comprising d

1. A method for assigning a unique scrambling code sequence to user equipment within the coverage area of one of a plurality of radio base station in a CDMA-based communication system, in which each radio base station is communicating with one of a plurality of radio network controllers,comprising dedicating a unique subset of scrambling code sequences to each code handling unit, determining the scrambling code sequence from the subset and assigning the scrambling code sequence to the radio connection of the user equipment within the coverage area of a radio base station connected to the radio network controller, dedicating said subset by assigning an offset vector as the first vector of a continuous succession of initial starting vectors that are used to generate the scrambling code sequences of said subset, and determining a scrambling code sequence by determining an initial starting vector that is used to generate said scrambling code sequence.