ALCAP-Less AAL2 Channel Establishment
Original Publication Date: 2002-May-29
Included in the Prior Art Database: 2002-May-29
In 3GPP UMTS Systems, AAL2 (ATM Adaptation Layer Type 2) connections are used on the Iu-CS, Iur, and Iub interfaces for transport of UMTS user data. The standardized way to establish AAL2 ATM Channels (hereafter referred to as AAL2 channels) is thru the use of the AAL2 Type 2 Signalling Protocol (aka ALCAP - Access Link Control Application Part). It has not been possible in the past to establish AAL2 channels without using ALCAP, at least in a standards compliant manner. There is a need to establish AAL2 channels without using ALCAP and actual implementations have used proprietary means to accomplish this. However these proprietary mechanisms are not standards compliant and implementations using the known proprietary mechanisms will not work with implementations that do support the standardized method. This paper proposes a method that can establish AAL2 channels without using ALCAP in a standards compliant manner which then allows compatibility with implementations using existing 3GPP standards (assuming implementation supporting ALCAP less method also supports standardized ALCAP).