Seamless mobility for 5g and lte systems and devices

Patent metadata

Field	Value
Publication number	US-2020128464-A1
Application number	US-201916584651-A
Country	US
Kind code	A1
Filing date	Sep 26, 2019
Priority date	May 29, 2015
Publication date	Apr 23, 2020
Grant date	—

Abstract

User equipment (UE), an enhanced NodeB (eNB) and method of reducing handover latency are generally described. The UE may transmit measurement feedback to the eNB based on control signals. The UE may receive a reconfiguration message from the eNB or another eNB to the UE is attached. The reconfiguration message may contain reconfiguration information indicating whether or not a physical layer or layer 2 of the UE is to be reconfigured and/or a security key is to be updated. The reconfiguration information may be dependent on whether the handover is between eNBs controlled by a same entity and/or whether the handover comprises an intra-frequency transition. The UE or eNB may initiate handover of the UE. During handover the UE may avoid physical layer or layer 2 reconfiguration or the security key update. The security key and data for the UE may be provided directly between the eNBs.

First claim

What is claimed is:

1 . An apparatus of user equipment (UE) comprising:
a transceiver arranged to communicate with a source enhanced NodeB (eNB) and a target eNB; and processing circuitry arranged to:
configure the transceiver to receive a reconfiguration message comprising reconfiguration information comprising at least one parameter indicating that physical layer and layer 2 reconfiguration and a security key update is to be avoided during handover; and
engage in handover from the source eNB to the target eNB free from physical layer and layer 2 reconfiguration and transmission of a security key to the target eNB, based on the reconfiguration message.

Assignees

• Intel Ip Corp

Inventors

• Zhang Yujian
• Fong Mo-Han
• Zong Pingping
• Davydov Alexei

Classifications

• H04W36/38

  by fixed network equipment · CPC title

• H04W84/045

  using private Base Stations, e.g. femto Base Stations, home Node B · CPC title

• H04W36/0027

  for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections · CPC title

• H04W36/18 Primary

  for allowing seamless reselection, e.g. soft reselection · CPC title

• H04W36/0055

  Transmission or use of information for re-establishing the radio link · CPC title