Contention-free Access in Wireless Communication System

摘要

A contention-free activation/deactivation mechanism in PRACH, which allows dynamic allocation of the contention-free and contention-based preambles. This allows contention-free preambles which have been allocated to a UE to be revoked once contention-free operation is no longer needed, or cannot be supported due to a shortage of preambles. In one embodiment, a terminal is configured (S12) with a contention-free preamble by specific signalling, and thereafter monitors periodic broadcasts (S14) indicating the set of contention-free preambles; if the configured preamble is within the set (S16, “Y”), the preamble is activated for contention-free operation (S18); otherwise (S16, “N”), the preamble is deactivated and the terminal should follow the contention-based procedure (S20).

主权项

1. A wireless communication method for use in a wireless communication system comprising a base station communicating with at least one terminal, the method comprising:
the base station configuring said terminal with a preamble signature to be used for transmission of a preamble in a contention-free random access procedure; and the base station, by subsequent signalling, dynamically activating and/or deactivating the use by said terminal of said preamble signature in said contention-free random access procedure.