# US 2009/0270102 A1 · Mobile terminal and network device for providing handover service

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- Number: US 2009/0270102 A1
- Document ID: US20090270102A1
- Status: Published application
- Kind: A1
- Application number: 12/190,390
- Filed: 2008-08-12
- Published: 2009-10-29
- Earliest claimed: 2008-04-23
- Assignees: Samsung Electronics Co., Ltd.; Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
- Inventors: Xiaoyu LIU; Su Won LEE; Marius-lulian CORICI; Alin Florindor MURARASU; Stefan ARBANOWSKI
- Web page: https://patentgrep.com/patent/US20090270102A1

## CPC

- H04W 36/362: {Conditional handover}
- H04W 80/08: Upper layer protocols {(network arrangements or communication protocols for networked applications H04L67/00)}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A mobile terminal and a network device for providing a handover service are provided. A mobile terminal includes a transmission unit to transmit a request message for handover information to a network device, and a receiving unit to receive a response message including the handover information from the network device, wherein the request message and the response message are transceived by an application layer protocol.

## Claims

### Claim 1

A mobile terminal comprising:
a transmission unit to transmit a request message for handover information to a network device; and
a receiving unit to receive a response message including the handover information from the network device,
wherein the request message and the response message are transceived by an application layer protocol.

### Claim 2 (depends on 1)

The mobile terminal of claim 1, wherein the transmission unit repeatedly transmits the request message, and the receiving unit receives the response message corresponding to each of the transmitted request messages.

### Claim 3 (depends on 2)

The mobile terminal of claim 2, wherein the request message includes an expiration time value with respect to a time of receiving the response message, and the expiration time value corresponds to 0.

### Claim 4 (depends on 1)

The mobile terminal of claim 1, wherein the transmission unit transmits the request message once, and the receiving unit repeatedly receives at least one response message corresponding to the transmitted request message.

### Claim 5 (depends on 4)

The mobile terminal of claim 4, wherein the transmission unit transmits, to the network device, a stop message to stop receiving the response message.

### Claim 6 (depends on 1)

The mobile terminal of claim 1, further comprising:
an interface unit to connect the receiving unit and the transmission unit with a device to perform a handover function.

### Claim 7 (depends on 1)

The mobile terminal of claim 1, wherein a handover corresponds to a Media Independent Handover (MIH).

### Claim 8 (depends on 1)

The mobile terminal of claim 1, wherein the application layer protocol corresponds to a mobility support protocol.

### Claim 9 (depends on 1)

The mobile terminal of claim 1, wherein the application layer protocol corresponds to a Session Initiation Protocol (SIP).

### Claim 10 (depends on 9)

The mobile terminal of claim 9, wherein the SIP provides an SIP event service, and
the transmission unit transmits the request message using an SIP SUBSCRIBE request.

### Claim 11 (depends on 9)

The mobile terminal of claim 9, wherein the SIP provides an SIP presence service, and
the transmission unit transmits the request message using an SIP PUBLISH request.

### Claim 12 (depends on 9)

The mobile terminal of claim 9, wherein the receiving unit receives the response message using an SIP NOTIFY request.

### Claim 13 (depends on 5)

The mobile terminal of claim 5, wherein the application layer protocol corresponds to an SIP,
the SIP provides an SIP presence service, and
the transmission unit transmits the stop message using an SIP SUBSCRIBE request.

### Claim 14 (depends on 1)

The mobile terminal of claim 1, wherein the handover information includes at least one of events, commands, and information, which are related to handover defined in an Institute of Electrical and Electronics Engineers (IEEE) 802.21.

### Claim 15

A network device comprising:
a receiving unit to receive a request message for handover information from at least one mobile terminal; and
a transmission unit to transmit a response message including the handover information to the at least one mobile terminal,
wherein the request message and the response message are transceived by an application layer protocol.

### Claim 16 (depends on 15)

The network device of claim 15, wherein the receiving unit repeatedly receives the request message, and the transmission unit transmits the response message corresponding to each of the received request messages.

### Claim 17 (depends on 15)

The network device of claim 15, wherein the receiving unit receives the request message once, and the transmission unit repeatedly transmits at least one response message corresponding to the received request message.

### Claim 18 (depends on 15)

The network device of claim 15, wherein, where the transmission unit receives a stop message to stop transmission of the response message, the transmission unit stops the transmission of the response message to the at least one mobile terminal.

### Claim 19 (depends on 15)

The network device of claim 15, further comprising:
an interface unit to connect the receiving unit and the transmission unit with a device to perform a handover function.