"This standard provides the specification for the interface which coincides with the Refe rence Point ""Ater"" defined in the TR45 Network Reference Model shown in [I-2]. The scope of this standard includes the following topics: Descriptions of the specified functional capabilities that provide wireless telecommun16 ications services across the BS-BS interface as defined in the TR45 Network Ref erence Model; Descriptions of the division of responsibility of the functions provided between the source BS and the target BS@ without prescribing specific implementations; Descriptions of the BS-BS interface standard that support DS-41 and cdma2000 1 systems. Purpose The purpose of this document is to provide the standard for interfacing a Base Station (BS) with one or more BSs. This document defines the functional capabilities@ including services and features@ of the specified interface. These services and features are the defining characteristics that are the basis for the overall system standard. 1 cdma2000is the trademark for the technical nomenclature for certain specifications and standards of the Organizational Partners (OPs) of 3GPP2. Geographically (and as of the date of publication)@ cdma2000 is a registered trademark of the Telecommunications Industry Association (TIA-USA) in the United States."