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Wenyu Liu, liuwenyu@huawei Jie Xu, xuj@huawei Huawei Technologies Co.,Ltd.

Summary of using FBSC for handoff from DO to 1x. Wenyu Liu, liuwenyu@huawei.com Jie Xu, xuj@huawei.com Huawei Technologies Co.,Ltd. A call transfer solution No modification to 1x RAN and other 1x network entities No A16 interface required. Key points of FBSC method.

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Wenyu Liu, liuwenyu@huawei Jie Xu, xuj@huawei Huawei Technologies Co.,Ltd.

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  1. Summary of using FBSC for handoff from DO to 1x Wenyu Liu, liuwenyu@huawei.com Jie Xu, xuj@huawei.com Huawei Technologies Co.,Ltd.

  2. A call transfer solution No modification to 1x RAN and other 1x network entities No A16 interface required Key points of FBSC method

  3. IWGW shall be located in the home network of user. FBSC shall be located in the visited network, and one local network needs only one FBSC. FBSC and IWGW

  4. Step 1: FBSC receives the 1x origination message from HAT; Step 2: FBSC sends the CM Service Request message to 1x MSC through A1/A1p interface; Step 3: After the CS call is established, FBSC initiates an inter-BSC handoff to transfer the call to real 1x BSC; Step 4: IWGW updates the bearer of OEP; Key steps of FBSC method

  5. Through SIP message: HAT discovers the FBSC address via the DHCP server when it accesses to DO network; HAT sends SIP message to FBSC through IMS network containing the FBSC address; How FBSC receives the origination message

  6. All messages between FBSC and HAT are sent through IMS network. Many methods to build confidence between FBSC and IMS network, similar to P-CSCF to I-CSCF. Security

  7. FBSC finds IX CELL ID A static table located in FBSC is shown as below: FBSC can find the 1x cell id by looking up the table

  8. Call transfer solution Origination call solution MS’s software updating solution Same point with A16 solution

  9. FBSC: 1xBSC and other entities need not to be modified. A16: 1xBSC needs to be modified and a new interface to DO RAN needs to be added to 1xBSC Difference from A16 solution

  10. FBSC: CSNA message is not necessary for one of our methods. A16: CSNA message needs to be supported by MS and DO RAN. Difference from A16 solution

  11. FBSC : WLAN and DO can use same solution A16: WLAN and DO use different solutions Difference from A16 solution

  12. Network Deployment Simplicity FBSC : No DO RAN and 1x BSC upgrading needed One local network only uses one FBSC Only 1 connection required between DO(FBSC) and 1x MSC A16: Each DO RAN and 1x BSC shall be upgraded Many connections (e.g. E1s) required between DO and 1X BSCs Difference from A16 solution

  13. Thanks

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