Prach-based proximity detection
AssigneeQUALCOMM Incorporated
InventorsAlan Barbieri, Hao Xu, Vikas Jain, Durga Prasad Malladi, Awaiz Ahmad Khan, Samatha Kotla, Balwinderpal Sachdev
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Abstract
Improvements to signaling procedures for use in physical random access channel (PRACH)-based proximity detection are disclosed. Signaling and signaling processes from a serving base station may trigger a more efficient and reliable transmission of PRACH from related user equipment (UE). At the dynamic power nodes (DPNs) monitoring for such PRACH-based proximity, features are disclosed which establish neighbor lists for more efficient management of detection and proximity activation.
Claims30
A method of wireless communication, comprising:
- transmitting, from a serving base station, a signal to a mobile device served by the serving base station, wherein the signal triggers periodic physical random access channel (PRACH) transmission from the mobile device.
A method of wireless communication, comprising:
- entering a reduced power mode at a dynamic power node (DPN);
- monitoring, by the DPN, for physical random access channel (PRACH) transmissions from one or more user equipments (UEs) proximate to the DPN;
- detecting a plurality of candidate PRACH transmissions;
- combining the plurality of candidate PRACH transmissions at the DPN to determine a detected PRACH transmission from a UE;
- determining, by the DPN, a proximity of the UE based on the detected PRACH transmission;
- and
- modifying operation of the DPN in response to the proximity.
An apparatus configured for wireless communication, comprising:
- at least one processor;
- and
- a memory coupled to the at least one processor,
- wherein the at least one processor is configured:
- to transmit, from a serving base station, a signal to a mobile device served by the serving base station, wherein the signal triggers periodic physical random access channel (PRACH) transmission from the mobile device.
An apparatus configured for wireless communication, comprising:
- at least one processor;
- and
- a memory coupled to the at least one processor,
- wherein the at least one processor is configured:
- to enter a reduced power mode at a dynamic power node (DPN);
- monitoring, by the DPN, for physical random access channel (PRACH) transmissions from one or more user equipments (UEs) proximate to the DPN;
- to detect a plurality of candidate PRACH transmissions;
- to combine the plurality of candidate PRACH transmissions at the DPN to determine a detected PRACH transmission from a UE;
- to determine, by the DPN, a proximity of the UE based on the detected PRACH transmission;
- and
- to modify operation of the DPN in response to the proximity.
Dependencies are inferred from the claim text.