Wireless device handover signalling
First Claim
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1. A method comprising:
- transmitting, by a first base station to a second base station and after making a handover decision for a wireless device, a first message comprising at least one parameter indicating the wireless device supports configuration of a plurality of cell groups;
receiving from the second base station at least one second message comprising first configuration parameters of a plurality of cells grouped into a first plurality of cell groups comprising a first cell group and a second cell group, wherein;
uplink transmission timing in the first cell group is derived employing a first cell in the first cell group; and
uplink transmission timing in the second cell group is derived employing a second cell in the second cell group; and
transmitting, to the wireless device, a third message comprising the first configuration parameters.
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Abstract
A first base station transmits, to a second base station and after making a handover decision for a wireless device, a first message. The first message comprises at least one parameter indicating the wireless device supports configuration of a plurality of cell groups. The first base station receives from the second base station a second message comprising first configuration parameters of a plurality of cells grouped into a first plurality of cell groups comprising a first cell group and a second cell group. The first base station transmits, to the wireless device, a third message comprising the first configuration parameters.
88 Citations
20 Claims
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1. A method comprising:
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transmitting, by a first base station to a second base station and after making a handover decision for a wireless device, a first message comprising at least one parameter indicating the wireless device supports configuration of a plurality of cell groups; receiving from the second base station at least one second message comprising first configuration parameters of a plurality of cells grouped into a first plurality of cell groups comprising a first cell group and a second cell group, wherein; uplink transmission timing in the first cell group is derived employing a first cell in the first cell group; and uplink transmission timing in the second cell group is derived employing a second cell in the second cell group; and transmitting, to the wireless device, a third message comprising the first configuration parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A first base station comprising:
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one or more processors; and memory storing instructions that, when executed, cause the first base station to; transmit, to a second base station and after making a handover decision for a wireless device, a first message comprising at least one parameter indicating the wireless device supports configuration of a plurality of cell groups; receive from the second base station at least one second message comprising first configuration parameters of a plurality of cells grouped into a first plurality of cell groups comprising a first cell group and a second cell group, wherein; uplink transmission timing in the first cell group is derived employing a first cell in the first cell group; and uplink transmission timing in the second cell group is derived employing a second cell in the second cell group; and transmit, to the wireless device, a third message comprising the first configuration parameters. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method for use in a wireless network, the method comprising:
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transmitting, by a first base station to a second base station and after making a handover decision for a wireless device, a first message comprising at least one parameter indicating the wireless device supports configuration of a plurality of cell groups; receiving, by the first base station from the second base station, at least one second message comprising first configuration parameters of a plurality of cells grouped into a first plurality of cell groups comprising a first cell group and a second cell group, wherein; uplink transmission timing in the first cell group is derived employing a first cell in the first cell group; and uplink transmission timing in the second cell group is derived employing a second cell in the second cell group; and receiving, by the wireless device from the first base station, a third message comprising the first configuration parameters. - View Dependent Claims (18, 19, 20)
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Specification