PRACH-based proximity detection
First Claim
Patent Images
1. 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;
modifying operation of the DPN in response to the proximity; and
monitoring, by the DPN, for a set of root sequences associated with at least one base station in a neighbor list at the DPN, wherein the set of root sequences are located in the PRACH transmissions from the one or more UEs, wherein the determining comprises;
determining the proximity of the UE based on a receive power of the PRACH transmission associated with a detected set of root sequences associated with one of the at least one base station in the neighbor list.
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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.
24 Citations
26 Claims
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1. A method of wireless communication, comprising:
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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; modifying operation of the DPN in response to the proximity; and monitoring, by the DPN, for a set of root sequences associated with at least one base station in a neighbor list at the DPN, wherein the set of root sequences are located in the PRACH transmissions from the one or more UEs, wherein the determining comprises; determining the proximity of the UE based on a receive power of the PRACH transmission associated with a detected set of root sequences associated with one of the at least one base station in the neighbor list. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus configured for wireless communication, comprising:
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at least one processor; and a memory coupled to the at least one processor, wherein the at least one processor is configure; to enter a reduced power mode at a dynamic power node (DPN); to monitor, by 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; to modify operation of the DPN in response to the proximity; and to monitor, by the DPN, for a set of root sequences associated with at least one base station in a neighbor list at the DPN, wherein the set of root sequences are located in the PRACH transmissions from the one or more UEs, wherein the configuration of the at least one processor to determine comprises configuration; to determine the proximity of the UE based on a receive power of the PRACH transmission associated with a detected set of root sequences associated with one of the at least one base station in the neighbor list. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus configured for wireless communication, comprising:
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means for entering a reduced power mode at a dynamic power node (DPN); means for monitoring, by the DPN, for physical random access channel (PRACH) transmissions from one or more user equipments (UEs) proximate to the DPN; means for detecting a plurality of candidate PRACH transmissions; means for combining the plurality of candidate PRACH transmissions at the DPN to determine a detected PRACH transmission from a UE; means for determining, by the DPN, a proximity of the UE based on the detected PRACH transmission; means for modifying operation of the DPN in response to the proximity; and means for to monitor, by the DPN, for a set of root sequences associated with at least one base station in a neighbor list at the DPN, wherein the set of root sequences are located in the PRACH transmissions from the one or more UEs, wherein the means for determining comprise; means for determining the proximity of the UE based on a receive power of the PRACH transmission associated with a detected set of root sequences associated with one of the at least one base station in the neighbor list. - View Dependent Claims (22, 23, 24)
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25. A non-transitory computer-readable medium having program code recorded thereon, the program code comprising program code for causing a computer:
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to enter a reduced power mode at a dynamic power node (DPN); to monitor, 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; to modify operation of the DPN in response to the proximity; and to monitor, by the DPN, for a set of root sequences associated with at least one base station in a neighbor list at the DPN, wherein the set root sequences are located in the PRACH transmissions from the one more UEs, wherein the program code for causing the computer to determine comprises program code for causing the computer; to determine the proximity of the UE based on a receive power of the PRACH transmission associated with a detected set of root sequences associated with one of the at least one base station in the neighbor list. - View Dependent Claims (26)
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Specification