Allocating resources in a wireless communication system

摘要

Loading information of an access node and a random access failure rate at the access node are determined, wherein the access node is using a first physical random access channel (PRACH) configuration index. Based on the comparison of the loading information to a loading criteria and the comparison of the random access failure rate to a failure rate criteria, a second PRACH configuration index is selected for the access node.

主权项

1. A method of allocating resources in a wireless communication system, comprising:
determining loading information of an access node and a random access failure rate at the access node, wherein the access node is using a first physical random access channel (PRACH) configuration index; comparing the loading information to a loading criteria, the loading information meeting the loading criteria when the loading information satisfies a physical resource block (PRB) utilization threshold; comparing the random access failure rate to a failure rate criteria, the random access failure rate meeting the failure rate criteria when a number of random access failures during a period of time is greater than or equal to a failure rate threshold; and selecting a second PRACH configuration index comprising fewer sub-frames allocated to a PRACH channel than the first PRACH configuration index from a group of PRACH configuration indices, the PRACH configuration indices enabling dynamic allocation of sub-frames to the PRACH channel, when the loading information meets the loading criteria and the random access failure rate does not meet the failure rate criteria.