Cellular communication system, apparatus and method for handover
First Claim
1. A method for handover of a wireless subscriber communication unit from a first base station to a second base station in a synchronous network, the method comprising at the first base station:
- sending a handover command message to the wireless subscriber communication unit conveying an identifier for the wireless subscriber communication unit to be used to identify the wireless subscriber communication unit, the handover being from the first base station to the second base station in the synchronous network;
sending an indication to the second base station, after sending the handover command message to the wireless subscriber communication unit, to indicate that the wireless subscriber communication unit is to be handed over to the second base station and to indicate that, from a perspective of the wireless subscriber communication unit, the wireless subscriber communication unit is ready to establish a connection to the second base station; and
forwarding data received from the wireless subscriber communication unit to the second base station.
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0 Petitions
Accused Products
Abstract
A method for handover of a wireless subscriber communication unit from a first base station to a second base station in a wireless network is described. The method comprises at the wireless subscriber communication unit receiving a handover command message from the first base station. At the first base station, the method comprises sending a scheduling request message to the second base station, in response to an acknowledgement message sent from the wireless subscriber communication unit. The method further comprises, at the second base station, scheduling, in response to the scheduling request message, at least one uplink scheduling resource (UL-SCH) for the wireless subscriber communication unit to transmit a handover (HO) confirmation message to the second base station; and receiving a handover confirmation message from the wireless subscriber communication unit on the at least one uplink scheduling resource (UL-SCH).
14 Citations
38 Claims
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1. A method for handover of a wireless subscriber communication unit from a first base station to a second base station in a synchronous network, the method comprising at the first base station:
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sending a handover command message to the wireless subscriber communication unit conveying an identifier for the wireless subscriber communication unit to be used to identify the wireless subscriber communication unit, the handover being from the first base station to the second base station in the synchronous network; sending an indication to the second base station, after sending the handover command message to the wireless subscriber communication unit, to indicate that the wireless subscriber communication unit is to be handed over to the second base station and to indicate that, from a perspective of the wireless subscriber communication unit, the wireless subscriber communication unit is ready to establish a connection to the second base station; and forwarding data received from the wireless subscriber communication unit to the second base station. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for handover of a wireless subscriber communication unit from a first base station to a second base station in a synchronous network, the method comprising at the second base station:
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sending a handover request acknowledgement message to the first base station conveying an identifier for the wireless subscriber communication unit to be used to identify the wireless subscriber communication unit, the handover being from the first base station to the second base station in the synchronous network; receiving an indication from the first base station after sending the handover request acknowledgement message to the first base station to indicate that the wireless subscriber communication unit is to be handed over to the second base station and to indicate that, from a perspective of the wireless subscriber communication unit, the wireless subscriber communication unit is ready to establish a connection to the second base station; and receiving from the first base station data received by the first base station from the wireless subscriber communication unit. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A base station capable of handover of a wireless subscriber communication unit to a second base station in a synchronous network, the base station comprising:
a transmitter configured to send a handover command message to the wireless subscriber communication unit conveying an identifier for the wireless subscriber communication unit to be used to identify the wireless subscriber communication unit, the handover being from the first base station to the second base station in the synchronous network; send an indication to the second base station after sending the handover command message to the wireless subscriber communication unit, to indicate that the wireless subscriber communication unit is to be handed over to the second base station and to indicate that, from a perspective of the wireless subscriber communication unit, the wireless subscriber communication unit is ready to establish a connection to the second base station; and forward data received from the wireless subscriber communication unit to the second base station. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A base station capable of receiving a communication handover of a wireless subscriber communication unit from a first base station in a synchronous network, the base station comprising:
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a transmitter configured to send a handover request acknowledgement message to the first base station conveying an identifier for the wireless subscriber communication unit to be used to identify the wireless subscriber communication unit, the handover being from the first base station to the second base station in the synchronous network; a receiver configured to receive an indication from the first base station, after sending the handover request acknowledgement message to the first base station, to indicate that the wireless subscriber communication unit is to be handed over to the second base station and to indicate that, from a perspective of the wireless subscriber communication unit, the wireless subscriber communication unit is ready to establish a connection to the second base station, and receive from the first base station data received by the first base station from the wireless subscriber communication unit. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A non-transitory computer readable medium encoded with a computer program for handover of a wireless subscriber communication unit from a first base station to a second base station in a synchronous network, the program, when loaded on a processor, causes the processor to execute a method comprising:
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sending a handover command message to the wireless subscriber communication unit conveying an identifier for the wireless subscriber communication unit to be used to identify the wireless subscriber communication unit, the handover being from the first base station to the second base station in the synchronous network; sending an indication to the second base station after sending the handover command message to the wireless subscriber communication unit, to indicate that the wireless subscriber communication unit is to be handed over to the second base station and to indicate that, from a perspective of the wireless subscriber communication unit, the wireless subscriber communication unit is ready to establish a connection to the second base station; and forwarding data received from the wireless subscriber communication unit to the second base station.
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38. A non-transitory computer readable medium encoded with a computer program for handover of a wireless subscriber communication unit from a first base station to a second base station in a synchronous network, the program, when loaded on a processor, causes the processor to execute a method comprising:
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sending a handover request acknowledgement message to the first base station conveying an identifier for the wireless subscriber communication unit to be used to identify the wireless subscriber communication unit, the handover being from the first base station to the second base station in the synchronous network; receiving an indication from the first base station, after sending the handover request acknowledgement message to the first base station, to indicate that the wireless subscriber communication unit is to be handed over to the second base station and to indicate that, from a perspective of the wireless subscriber communication unit, the wireless subscriber communication unit is ready to establish a connection to the second base station; and receiving from the first base station data received by the first base station from the wireless subscriber communication unit.
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Specification