Method and system for access and uplink power control for a wireless system having multiple transmit points

摘要

A method and system for access and uplink power control for a wireless system having multiple transmit points. In one aspect a method operating in a wireless network having a plurality of transmission points (TP) including a macro evolved Node B (eNB) and at least one low power node (LPN) having transmit power lower than that of the macro eNB, the method detecting, by the user equipment, a transmission point having a lowest path loss to the user equipment; and transmitting, by the user equipment, a physical random access channel (PRACH) preamble on a PRACH directed to the transmission points having the lowest path losses.

主权项

1. A method at a user equipment (UE) operating in a wireless network, the method comprising:
receiving, at the user equipment, information indicating a transmission point specific signal (TSS) for each of a plurality of transmission points (TPs) in the wireless network all having the same cell identifier, the plurality of TPs including a macro evolved Node B (eNB) and one or more low power nodes (LPNs) having transmit power lower than that of the macro eNB, each TSS uniquely identifying a transmission point (TP) in the plurality of TPs all having the same cell identifier; detecting, by the user equipment, a TP having a lowest path loss to the user equipment based on at least one transmission point specific signal received at the user equipment; and transmitting, by the user equipment, a physical random access channel (PRACH) preamble using a PRACH configuration associated with the transmission point having the lowest path loss, the PRACH configuration being at least one of a PRACH configuration for the macro eNB and a PRACH configuration for all of the one or more LPNs where the PRACH configuration for the macro eNB is configured in a different time, frequency, or both time and frequency resource from the PRACH configuration for all of the one or more LPNs.