Dual link handover
First Claim
1. A method of wireless communication, comprising:
- receiving a first data transmission from a source base station while in a medium access control (MAC) configuration, a radio link control (RLC) configuration, and a packet data convergence protocol (PDCP) configuration;
receiving a connection reconfiguration message associated with a handover from the source base station to a target base station;
applying a radio resource control (RRC) configuration based at least in part on the received connection reconfiguration message;
receiving a second data transmission from the source base station after receiving the connection reconfiguration message;
performing an access procedure with the target base station based at least in part on receiving the connection reconfiguration message;
determining whether the access procedure was successful; and
resetting the MAC configuration, resetting the RLC configuration, or reestablishing the PDCP configuration, or any combination thereof, based at least in part on a determination that the access procedure was successful.
1 Assignment
0 Petitions
Accused Products
Abstract
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive data from both a source base station and a target base station during handover. For example, the UE may refrain from resetting or reestablishing media access control (MAC) and packet data convergence protocol (PDCP) layer configurations until after a successful access procedure is performed with the target base station. In some cases, a single radio link control (RLC)/PDCP stack may be used during handover procedures. A source base station may, for example, forward data to a target base station after receiving a handover execution message. A UE may identify and resolve any duplicate data sent by both base stations during the transition. Additional signaling may be used (e.g., during the radio resource control (RRC) configuration) to indicate that a UE supports dual link handover.
64 Citations
45 Claims
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1. A method of wireless communication, comprising:
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receiving a first data transmission from a source base station while in a medium access control (MAC) configuration, a radio link control (RLC) configuration, and a packet data convergence protocol (PDCP) configuration; receiving a connection reconfiguration message associated with a handover from the source base station to a target base station; applying a radio resource control (RRC) configuration based at least in part on the received connection reconfiguration message; receiving a second data transmission from the source base station after receiving the connection reconfiguration message; performing an access procedure with the target base station based at least in part on receiving the connection reconfiguration message; determining whether the access procedure was successful; and resetting the MAC configuration, resetting the RLC configuration, or reestablishing the PDCP configuration, or any combination thereof, based at least in part on a determination that the access procedure was successful. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of wireless communication at a target base station, comprising:
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receiving, by the target base station, a handover prepare request from a source base station; receiving an access request from a wireless device; receiving a connection reconfiguration complete message from the wireless device based at least in part on the access request; and transmitting a handover execution message to the source base station based at least in part on the connection reconfiguration complete message. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An apparatus for wireless communication, comprising:
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means for receiving a first data transmission from a source base station while in a medium access control (MAC) configuration, a radio link control (RLC) configuration, and a packet data convergence protocol (PDCP) configuration; means for receiving a connection reconfiguration message associated with a handover from the source base station to a target base station; means for applying a radio resource control (RRC) configuration based at least in part on the received connection reconfiguration message; means for receiving a second data transmission from the source base station after receiving the connection reconfiguration message; means for performing an access procedure with the target base station based at least in part on receiving the connection reconfiguration message; means for determining whether the access procedure was successful; and means for resetting the MAC configuration, resetting the RLC configuration, or reestablishing the PDCP configuration, or any combination thereof, based at least in part on a determination that the access procedure was successful. - View Dependent Claims (21, 22, 23)
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24. An apparatus for wireless communication at a target base station, comprising:
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means for receiving, by the target base station, a handover prepare request from a source base station; means for receiving an access request from a wireless device; means for receiving a connection reconfiguration complete message from the wireless device based at least in part on the access request; and means for transmitting a handover execution message to the source base station based at least in part on the connection reconfiguration complete message. - View Dependent Claims (25, 26)
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27. An apparatus for wireless communication, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to; receive a first data transmission from a source base station while in a medium access control (MAC) configuration, a radio link control (RLC) configuration, and a packet data convergence protocol (PDCP) configuration; receive a connection reconfiguration message associated with a handover from the source base station to a target base station; apply a radio resource control (RRC) configuration based at least in part on the received connection reconfiguration message; receive a second data transmission from the source base station after receiving the connection reconfiguration message; perform an access procedure with the target base station based at least in part on receiving the connection reconfiguration message; determine whether the access procedure was successful; and reset the MAC configuration, reset the RLC configuration, or reestablish the PDCP configuration, or any combination thereof, based at least in part on a determination that the access procedure was successful. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. An apparatus for wireless communication at a target base station, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to; receive a handover prepare request from a source base station; receive an access request from a wireless device; receive a connection reconfiguration complete message from the wireless device based at least in part on the access request; and transmit a handover execution message to the source base station based at least in part on the connection reconfiguration complete message. - View Dependent Claims (38, 39, 40, 41, 42, 43)
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44. A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable to:
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receive a first data transmission from a source base station while in a medium access control (MAC) configuration, a radio link control (RLC) configuration, and a packet data convergence protocol (PDCP) configuration; receive a connection reconfiguration message associated with a handover from the source base station to a target base station; apply a radio resource control (RRC) configuration based at least in part on the received connection reconfiguration message; receive a second data transmission from the source base station after receiving the connection reconfiguration message; perform an access procedure with the target base station based at least in part on receiving the connection reconfiguration message; determine whether the access procedure was successful; and reset the MAC configuration, reset the RLC configuration, or reestablish the PDCP configuration, or any combination thereof, based at least in part on a determination that the access procedure was successful.
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45. A non-transitory computer-readable medium storing code for wireless communications at a target base station, the code comprising instructions executable to:
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receive, by the target base station, a handover prepare request from a source base station; receive an access request from a wireless device; receive a connection reconfiguration complete message from the wireless device based at least in part on the access request; and transmit a handover execution message to the source base station based at least in part on the connection reconfiguration complete message.
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Specification