Abstract: A method of reducing access time to a UTRAN in UMTS. Upon receipt of a preamble signature from a UE, the UTRAN determines whether the preamble signature is in current use. If the preamble signature corresponds to an available RACH, the UTRAN transmits a positive AICH to the UE. If the preamble signature corresponds to an RACH in current use, the UTRAN determines whether there is a signature corresponding to an available RACH. If all signatures are in use, the UTRAN transmits a negative AICH to the UE.

Abstract: A method and system for downlink channelization code allocation or assignment in a Universal Mobile Telecommunication System (UMTS) are presented. The method and system generate an optimal channelization or Orthogonal Variable Spreading Factor Orthogonal Variable Spreading Factor (OVSF) code to be assigned to a new channel through a route having the minimum influence while maintaining the existing or assigned OVSF codes. The inventive method and system leave reserved codes by managing generation and release of the OVSF codes. This prevents situations where the new channel cannot be assigned an OVSF code due to a lack of OVSF codes, even though there is enough available power and enough available channels.

Abstract: A method of reducing access time to a UTRAN in UMTS. Upon receipt of a preamble signature from a UE, the UTRAN determines whether the preamble signature is in current use. If the preamble signature corresponds to an available RACH, the UTRAN transmits a positive AICH to the UE. If the preamble signature corresponds to an RACH in current use, the UTRAN determines whether there is a signature corresponding to an available RACH. If all signatures are in use, the UTRAN transmits a negative AICH to the UE.

Abstract: A method and system for downlink channelization code allocation or assignment in a UMTS are presented. The method and system generate an optimal channelization or OVSF code to be assigned to a new channel through a route having the minimum influence while maintaining the existing or assigned OVSF codes. The inventive method and system leave reserved codes by managing generation and release of the OVSF codes. This prevents situations where the new channel cannot be assigned an OVSF code due to a lack of OVSF codes, even though there is enough available power and enough available channels.