1. 5 November 20071 Overview of Proposed Femtocell Architecture Alternatives presented at the 3GPP2 Femto Workshop Airvana 5 November 2007 cdma2000® is the trademark for the technical nomenclature for certain specifications and standards of the Organizational Partners (OPs) of 3GPP2. The contributor grants a free, irrevocable license to 3GPP2 and its Organizational Partners to incorporate text or other copyrightable material contained in the contribution and any modifications thereof in the creation of 3GPP2 publications; to copyright and sell in Organizational Partner's name any Organizational Partner's standards publication even though it may include all or portions of this contribution; and at the Organizational Partner's sole discretion to permit others to reproduce in whole or in part such contribution or the resulting Organizational Partner's standards publication. The contributor is also willing to grant licenses under such contributor copyrights to third parties on reasonable, non-discriminatory terms and conditions for purpose of practicing an Organizational Partner’s standard which incorporates this contribution. This document has been prepared by the Contributor to assist the development of specifications by 3GPP2. It is proposed to the Committee as a basis for discussion and is not to be construed as a binding proposal on the Contributor. The contributor specifically reserves the right to amend or modify the material contained herein and to any intellectual property of the contributor other than provided in the copyright statement above.

2. 5 November 20072 Femtocell Architecture Alternatives 1x Circuit Services 1x and HRPD Packet Data Services

3. 5 November 20073 1x Circuit Service Architecture Alternatives Legacy-based Architecture –Security Gateway (FNG) –Femtocell generates A1/A2p –A1/A2p interface terminates on MSCe, which interfaces to the ANSI-41 core network SIP/IMS-based Architecture –Security Gateway (FNG) –Femtocell generates SIP/IMS; talks to IMS core network –Convergence Server (CSRV) acts as gateway between SIP/IMS and legacy circuit (ANSI-41) core networks SIP-based Architecture with Call Manager Gateway –Security Gateway (FNG) –Femtocell generates SIP; talks to Call Manager –Call Manager acts as gateway from SIP to legacy A1/A2 circuit –Circuit services provided by MSC via A1/A2 interfaces

4. 5 November 20074 Typical Femto Architectures for Legacy Circuit Services (Legacy Technology-based Approach) Femtocell Public Internet Legacy Circuit Network Femto Network Gateway Legacy Controller (e.g., MSCe) Legacy Circuit Protocols (e.g., ANSI-41) HLR MSC Legacy Controller Protocols Tunneled in IP (e.g., A1/A2p) Device Requesting Legacy Circuit Service (e.g., 1x Voice) Mux/ Demux Proxy

5. 5 November 20075 Typical Femto Architectures for Legacy Circuit Services (SIP/IMS-based Approach) Femtocell Public Internet Legacy Circuit Network Femto Network Gateway Convergence Server (CSRV) Legacy Circuit Protocols (e.g., ANSI-41) HLR MSC SIP Device Requesting Legacy Circuit Service (e.g., 1x Voice) Operator’s SIP/IMS Network SIP MGW RTP

6. 5 November 20076 Typical Femto Architectures for SIP-based Architecture with Call Manager Gateway Femtocell Public Internet Legacy Circuit Network Femto Network Gateway Call Manager A1/A2 HLR MSC SIP Device Requesting Legacy Circuit Service (e.g., 1x Voice)

7. 5 November 20077 1x and HRPD Packet Data Architecture Alternatives PCF + PDSN –Security Gateway (FNG) –PCF Concentrator –Use existing A10/A11 to PDSN from each Femtocell PDST + FNG –Security Gateway (FNG) –Current PDSN functions divided between Femtocell and FNG

8. 5 November 20078 PCF + PDSN Architecture EV-DO EV-DO Phone 1x Phone 1xRTT SeGW PCF Concentrator IP Core Network HA IPSec Tunnel(s) (M-)IP PDSN PPP/A10/A11 PPP/A10/A11/IPSec PPP/A10/A11

9. 5 November 20079 PDST + FNG Architecture EV-DO EV-DO Phone 1x Phone 1xRTT Femto Network Gateway (FNG) IP Core Network HA IPSec Tunnel(s) (M-)IP