Method for code re-allocation in telecommunication systems, related system and computer product
AssigneeTelecom Italia S.p.A.
InventorsPaolo Goria, Claudio Guerrini, Nicola Pio Magnani
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Abstract
In a code division multiple access transmission system (CDMA), codes are generated according to a tree structure organized on a plurality of layers. Each re-allocation is considered as an access request to the system by a new user and the re-allocation codes are transmitted to each involved user through the respective re-allocation messages. Re-allocation messages to users having the same spreading factor (SF), and hence the same service bit-rate (kR) are substantially sent simultaneously, in order to reduce to a minimum the time required for the re-allocation operation.
Claims6
A method for re-allocating channeling codes associated to users in a code division multiple access transmission system, said users operating at least at two different service bit-rates, said codes being generated according to a tree structure organized on a plurality of layers, each layer being the identifier of a respective spreading factor and of a corresponding service bit-rate, the method comprising the steps of
- dispatching to each user involved in a code re-allocation a respective re-allocation message, characterized in that it comprises the step of simultaneously dispatching the re-allocation messages to the users operating with the same spreading factor;
- and
- dispatching the re-allocation message in a time sequential order starting from the re-allocation messages sent to the users with the respective higher spreading factor.
Dependencies are inferred from the claim text.