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US 10,834,760 B2Granted
Mobility enhancement with channel state information reference signals (CSI-RS)
AssigneeQUALCOMM Incorporated
InventorsHaitong Sun, Wanshi Chen, Heechoon Lee, Kambiz Azarian Yazdi, Tingfang Ji, Peter Gaal
Life of this patent
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Abstract
Certain aspects may help enhance mobility of a UE, for example, utilizing downlink and/or uplink reference signals to assist in locating and/or handing over a UE in a cell with multiple transmit reception points (TRPs).
Claims11
A method for wireless communications by a user equipment (UE), comprising:
- measuring one or more cell specific channel state information reference signals (CSI-RSs) including a cell identifier (ID), after exiting a reduced power state;
- transmitting an uplink reference signal to a first transmit receive point (TRP) in the cell;
- receiving signaling from the network, based on the uplink reference signal, of an indication of a second TRP for handover of the UE, wherein the signaling of the indication of the second TRP for handover comprises using a physical downlink control channel (PDCCH) scrambled by both an ID of the UE and the cell ID;
- and
- monitoring for another PDCCH from the second TRP.
2 more elements
A method for wireless communications by a first transmit receive point (TRP) in a cell of a network, comprising:
- transmitting one or more cell specific channel state information reference signals (CSI-RSs) including an identifier (ID) of the cell, discoverable by a user equipment (UE) upon exiting a reduced power state;
- receiving an uplink reference signal from the UE;
- and
- transmitting, to the UE, signaling of an indication of a second TRP for handover of the UE based on the uplink reference signal, wherein the signaling of the indication of the second TRP for handover comprises using a physical downlink control channel (PDCCH) scrambled by both an ID of the UE and the ID of the cell.
1 more element
Dependencies are inferred from the claim text.