QUALCOMM Incorporated
Inter-cell coordination of random access channel transmission

Abstract:

Methods, systems, and devices for wireless communications are described. In some cases, inter-cell interference may occur for one or more random access channel (RACH) transmissions. To mitigate the inter-cell interference, one or more based stations may use inter-cell coordination to exchange configuration information associated with RACH procedures. Accordingly, each base station may select cell-specific RACH configurations to mitigate the inter-cell interference based on the exchanged configuration information and transmit the cell-specific RACH configurations to user equipments (UEs) served by each base station. In some cases, each base station and the corresponding UEs may use the cell-specific RACH configurations for a two-step RACH procedure that includes a first RACH message transmitted from a UE to the base station and a second RACH message transmitted from the base station to the UE. As described herein, the cell-specific RACH configurations may differ by at least one parameter to avoid the inter-cell interference.