Femtocell architecture in support of voice and data communications
Methods and systems for providing voice and date services in a femtocell wireless network. The proposed approach integrates IWLAN architecture into femtocell architecture by introducing a gateway to serve both IWLAN and femtocell users. The proposed approach handles the voice and data in a different way so that it enhances the data handling efficiency while re-using existing MSC investment. The proposed approach carries the data traffic from a femtocell base station to the gateway in native IP packet, instead of encapsulating them in 3G data, thus enhancing the efficiency and performance for the data traffic. The data traffic can then be sent to GGSN or directly to packet data network. The approach tunnels voice traffic to MSC through the gateway as in conventional Iu-CS approach.
1. A radio access network, comprising:
a femtocell base station; and
a wireless gateway;
wherein data payload between said femtocell base station and said gateway is transmitted directly over IPsec, without the support of GTP as defined over Iu-ps, and said femtocell base station handles control traffic in substantially the same way as it handles data traffic.
2. The network of claim 1 , wherein said gateway has the TTG (tunnel terminating gateway) functionality to route the payload to GGSN.
3. The network of claim 1 , wherein said femtocell station relays voice traffic from a user equipment over a Iu-CS interface to said gateway.
4. The network of claim 1 , wherein said femtocell station handles voice traffic from a user equipment the same way as 3G voice services and without CC to SIP translation function.
5. The network of claim 1 , wherein said gateway forwards Iu-CS traffic from said femtocell station to a Mobile Switching Center.
6. The network of claim 1 , wherein said femtocell station terminates Uu radio interface signaling from a wireless handset and strips IP payload to be sent to said gateway directly inside a IPsec, instead of encapsulating it inside a Iu-PS and sending it inside IPsec.
7. The network of claim 1 , wherein said gateway, upon receipt of an IP payload from said femtocell station, encapsulates said payload to send over a Gn interface to a GGSN.
8. The method of claim 1 , wherein said gateway routes said data payload from said femtocell station directly to a destination public data network without encapsulation.