Mixed Mobile Communication System of Asynchronous Communication Network and Synchronous Communication Network Having Handover Function of Mobile Communication Terminal, and Handover Method in the Same
First Claim
1. A mobile communication system in which an asynchronous mobile communication system, including a node B, a radio network controller (RNC) and an asynchronous Mobile Switching Center (MSC), and a synchronous mobile communication system, including a Base Transceiver Station (BTS), a Base Station Controller (BSC) and a synchronous MSC, coexist, the mobile communication system enabling handover of a Dual Band Dual Mode (DBDM) mobile communication terminal, capable of communicating with the asynchronous and synchronous systems, during voice communication, reception alerting, or waiting for a response after origination of a call, wherein:
- the asynchronous and synchronous MSCs are connected to each other via an Interworking Interoperability Function (IIF), and are connected to a Dual stack Home Location Register (D-HLR);
the D-HLR stores and manages asynchronous subscription and synchronous subscription information of the mobile communication terminal; and
the IIF stores and manages the synchronous mobile communication system information, receives the synchronous subscription information of the mobile communication terminal from the D-HLR at a request of the asynchronous MSC for handover, transmits the synchronous system information and the synchronous subscription information of the mobile communication terminal to the synchronous MSC and receives a response from the synchronous MSC, thereby setting up a relay line between the asynchronous MSC and the synchronous MSC, and requests the asynchronous MSC to release a wireless connection when the mobile communication terminal and the synchronous mobile communication system are connected to each other and notification of completion of the handover is provided by the synchronous MSC.
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Accused Products
Abstract
In the mobile communication system, asynchronous and synchronous Mobile Switching Centers (MSCs) are interconnected via an Interworking Interoperability Function (HF), and are connected to a Dual stack Home Location Register (D-HLR). The D-HLR stores and manages asynchronous subscription and synchronous subscription information of the mobile communication terminal. The HF stores and manages the synchronous mobile communication system information, receives the synchronous subscription information of the mobile communication terminal from the D-HLR, transmits synchronous system information and the synchronous subscription information of the mobile communication terminal to the synchronous MSC and receives a response from the synchronous MSC, and requests the asynchronous MSC to release a wireless connection when the mobile communication terminal and the synchronous mobile communication system are interconnected and notification of completion of the handover is provided.
19 Citations
23 Claims
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1. A mobile communication system in which an asynchronous mobile communication system, including a node B, a radio network controller (RNC) and an asynchronous Mobile Switching Center (MSC), and a synchronous mobile communication system, including a Base Transceiver Station (BTS), a Base Station Controller (BSC) and a synchronous MSC, coexist, the mobile communication system enabling handover of a Dual Band Dual Mode (DBDM) mobile communication terminal, capable of communicating with the asynchronous and synchronous systems, during voice communication, reception alerting, or waiting for a response after origination of a call, wherein:
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the asynchronous and synchronous MSCs are connected to each other via an Interworking Interoperability Function (IIF), and are connected to a Dual stack Home Location Register (D-HLR); the D-HLR stores and manages asynchronous subscription and synchronous subscription information of the mobile communication terminal; and the IIF stores and manages the synchronous mobile communication system information, receives the synchronous subscription information of the mobile communication terminal from the D-HLR at a request of the asynchronous MSC for handover, transmits the synchronous system information and the synchronous subscription information of the mobile communication terminal to the synchronous MSC and receives a response from the synchronous MSC, thereby setting up a relay line between the asynchronous MSC and the synchronous MSC, and requests the asynchronous MSC to release a wireless connection when the mobile communication terminal and the synchronous mobile communication system are connected to each other and notification of completion of the handover is provided by the synchronous MSC. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A handover method for performing handover of a DBDM mobile communication terminal, capable of communicating with asynchronous and synchronous mobile communication systems, during voice communication, or reception alerting, or while waiting for a response after origination of a call in a mobile communication system in which the asynchronous mobile communication system, including a node B, a radio network controller (RNC) and an asynchronous MSC, and the synchronous mobile communication system, including a BTS, a BSC and a synchronous MSC, coexist, the asynchronous and synchronous MSCs being connected to each other via an IIF, the asynchronous and synchronous MSCs being connected to a D-HLR, the method comprising the steps of:
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the RNC transmitting a handover request message to the asynchronous MSC at a request of the mobile communication terminal for handover; the asynchronous MSC transmitting a request message to the IIF; the IIF requesting and receiving subscriber information of the mobile communication terminal from the D-HLR; the IIF directing the synchronous MSC to perform handover, and the synchronous MSC requesting handover to the BSC/BTS; the BTS/BSC assigning a forward traffic channel to the mobile communication terminal, and transmitting a response message for the handover request to the synchronous MSC; the synchronous MSC transmitting a response message for the handover direction to the IIF, and the IIF transmitting a response message for the handover request to the asynchronous MSC, thereby setting up a relay line between the asynchronous MSC and the synchronous MSC; the asynchronous MSC reporting completion of assignment of resources for handover to the RNC; the RNC directing the mobile communication terminal to perform handover via the node B; the mobile communication terminal switching to a mode for connecting to the synchronous mobile communication system; the IIF transmitting an access signal to the asynchronous MSC; the mobile communication terminal transmitting frames and a preamble to the BTS/BSC via a reverse traffic channel and reporting completion of the handover to the BTS/BSC; the BTS/BSC reporting the completion of the handover to the synchronous MSC, the MSC notifying the IIF of the completion of the handover; and the IIF requesting the asynchronous MSC to release the connection, and the connection between the asynchronous MSC and the node B/RNC being released. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification