Apparatus and method of processing handover of a mobile relay station in broadband wireless access (BWA) communication system using multihop relay scheme
First Claim
1. A communication method of a mobile relay station (MRS) in a cellular communication system, the method comprising:
- transmitting a handover request message including child node information to a serving base station (BS) when handover is required;
receiving a handover response message including an adjacent node list from the serving BS;
determining a handover target node based on information contained in the handover response message; and
transmitting a handover indication message including the target node to the serving BS.
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Accused Products
Abstract
An apparatus and method of processing handover of a mobile relay station (MRS) in a cellular communication system using a multihop relay scheme is provided. The handover processing method includes transmitting, by the MRS, a handover request message containing child node information to a serving BS when handover is required; making, by the serving BS, an adjacent node list by collecting handover-related information from adjacent nodes to which the MRS is able to be handed over when the handover request message is received; transmitting, by the serving BS, a handover response message containing the adjacent node list to the MRS; and determining, by the MRS, a handover target node based on information contained in the handover response message and transmitting a handover indication message containing the target node to the serving BS. By suggesting the handover method of the MRS in the multihop relay system, it is possible to provide uninterrupted communication to the MRS and its child node in the service area of the MRS.
97 Citations
63 Claims
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1. A communication method of a mobile relay station (MRS) in a cellular communication system, the method comprising:
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transmitting a handover request message including child node information to a serving base station (BS) when handover is required;
receiving a handover response message including an adjacent node list from the serving BS;
determining a handover target node based on information contained in the handover response message; and
transmitting a handover indication message including the target node to the serving BS. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A communication method of an MRS in a cellular communication system, the method comprising:
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receiving a handover response message containing an adjacent node list from a serving BS when handover is required;
determining a handover target node based on information contained in the handover response message; and
transmitting a handover indication message including the target node. - View Dependent Claims (15, 16, 17, 18)
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19. A communication method of a serving BS in a cellular communication system, the method comprising:
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receiving a handover request message containing child node information from an MRS when handover of the MRS is required;
making an adjacent node list by collecting handover-related information from adjacent nodes to which the MRS is able to be handed over when the handover request message is received;
transmitting a handover response message including the adjacent node list to the MRS; and
receiving a handover indication message including a handover target node from the MRS. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An MRS apparatus in a cellular communication system, comprising:
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a message generator which generates a handover request message containing child node information when handover is required;
a transmitter which converts the message generated at the message generator according to a prescribed wireless standard and sends the converted message via an antenna;
a message processor which extracts an adjacent node list from a handover response message received from a serving BS after the handover request message is transmitted; and
a handover processor which determines a handover target node based on the adjacent node list. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A BS apparatus in a cellular communication system, comprising:
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a handover processor which makes an adjacent node list by collecting handover-related information from adjacent nodes to which the MRS is able to be handed over when handover of the MRS is required;
a message generator which generates a handover response message containing the adjacent node list; and
a transmitter which processes the message generated at the message generator according to a prescribed wireless standard and transmits the processed message via an antenna. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. A handover processing method of an MRS in a cellular communication system, the method comprising:
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transmitting, by the MRS, a handover request message containing child node information to a serving BS when handover is required;
making, by the serving BS, an adjacent node list by collecting handover-related information from adjacent nodes to which the MRS is able to be handed over when the handover request message is received;
transmitting, by the serving BS, a handover response message containing the adjacent node list to the MRS; and
determining, by the MRS, a handover target node based on information contained in the handover response message and transmitting a handover indication message containing the target node to the serving BS. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63)
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Specification