Determining preamble sequences for random access

摘要

The present invention relates to a method and a communication network node for enabling auto-tuning of preamble sequences used during random access procedures when user equipments (18) are accessing a communication network system comprising radio base stations (15) each serving at least one cell (19) and with which said user equipments (18) are communicating on uplink (13) and downlink (12) channels. An initial set of RACH preamble sequences in one cell of a radio base station (15) and statistics on RACH usage and information on identified RACH preamble sequences potentially conflicting between neighbors of said radio base station (15) is collected. The collected statistics is used for optimizing said set of RACH preamble sequences, whereby the initial set of RACH preamble sequences is replaced with the optimized set of RACH preamble sequences.

主权项

1. A method of enabling auto-tuning of preamble sequences used during random access procedures, comprising:
using an initial set of random access channel preamble sequences in one cell of a radio base station; identifying potentially conflicting random access channel preamble sequences between neighbours of said radio base station; collecting statistics on random access channel usage and information on the identified random access channel preamble sequences potentially conflicting between neighbours of said radio base station; optimizing said set of random access channel preamble sequences using said collected statistics; and replacing said initial set of random access channel preamble sequences with said optimized set of random access channel preamble (RACP) sequences, wherein the initial set of RACP sequences includes at least one RACP sequence that is not included in the optimized set of RACP sequences and said radio base station is configured such that only the optimized set of random access channel preamble sequences is used in said cell as a result of the replacing step being performed.