PC5 groupcast messages with selected system information
AssigneeKYOCERA Corporation
InventorsHenry Chang, Masato Fujishiro
Life of this patent
Estimating the term…
Abstract
A relay user equipment (UE) device transmits selected system information in a PC5 groupcast message, where the selected system information is a subset of system information received from a cell at the relay UE device. A remote UE device receiving the PC5 groupcast message with the selected system information obtains at least system information for accessing the cell where such system information may not be available directly from the cell. The remote UE device manages relay selection/reselection at least partially based on the selected system information.
Claims14
A remote user equipment (UE) device comprising:
- a receiver configured to receive a first PC5 groupcast message and a second PC5 groupcast message, the first PC5 groupcast message transmitted from a first candidate relay UE and comprising first selected system information that is a portion of first relay-received system information received at the first candidate relay UE from a first cell, the second PC5 groupcast message transmitted from a second candidate relay UE and comprising second selected system information that is a portion of second relay-received system information received at the second candidate relay UE from a second cell, wherein the first selected system information comprises first selected Minimum System Information (MSI) that is a portion of MSI transmitted by the first cell and the second selected system information comprises second selected MSI that is a portion of MSI transmitted by the second cell;
- and
- a controller configured to select, from the first candidate relay UE and the second candidate relay and at least partially based on the first selected system information and the second selected system information, a relay UE for UE-to-Network (U2N) communication.
A remote user equipment (UE) device comprising:
- a receiver configured to receive a first PC5 groupcast message and a second PC5 groupcast message, the first PC5 groupcast message transmitted from a first candidate relay UE and comprising first selected system information that is a portion of first relay-received system information received at the first candidate relay UE from a first cell, the second PC5 groupcast message transmitted from a second candidate relay UE and comprising second selected system information that is a portion of second relay-received system information received at the second candidate relay UE from a second cell;
- and
- a controller configured to select, from the first candidate relay UE and the second candidate relay and at least partially based on the first selected system information and the second selected system information, a relay UE for UE-to-Network (U2N) communication, wherein the controller is configured to, when the remote UE device is a member of a groupcast group, refrain from using pre-configuration system information for a cell, the controller configured to place the receiver in active receiving state at an active ON time when a PC5 groupcast message is transmitted to a plurality of UE devices in the groupcast group, the PC5 groupcast message comprising selected system information for the cell,
- the receiver configured to receive the PC5 groupcast message from a relay UE device without an established PC5-RRC link to the relay UE device, the selected system information obtained by the relay UE device from the cell.
Dependencies are inferred from the claim text.