UMTS Architecture Evolution Principles
TS 23.121Rel-4Core Network3GIntermediate
Specifies evolution of GSM platform to UMTS, covering service requirements, roaming support, signaling systems, and interfaces for Release 99.
Protocol Definition
Document Type
Technical Specification
Network Layer
CoreNetwork
Subcategory
Architecture
Business Impact
High
Key Technologies
UMTSGPRSATMGTPSCCP
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View the complete text of 3GPP TS 23.121 with table of contents and cross-references.