UPLINK SCRAMBLING DURING RANDOM ACCESS

摘要

The technology described in this case facilitates random access by a user terminal with a radio base station. A user terminal determines one of a first type of uplink scrambling sequences and generates a random access message using the determined one of the first type of uplink scrambling sequences. The random access message is transmitted to the base station. The user terminal receives from the base station a second, different type of uplink scrambling sequence and uses it for subsequent communication with the radio base station. For example, the first uplink scrambling sequences may be specifically associated with the radio base station's cell area or a random access radio channel associated with the radio base station, but they are not specifically assigned to any user terminal, and the second uplink scrambling sequence may be selected from a second set of uplink scrambling sequences specifically assignable to individual user terminals.

主权项

1. A method implemented in a user terminal for accessing a radio channel, the method comprises:
transmitting a first message to a radio base station, wherein the first message includes a random access preamble, and wherein the first message is transmitted using a random access channel radio resource; receiving a second message from the radio base station, wherein the second message indicates an identified radio resource and a user terminal identifier; determining a first uplink scrambling sequence based on the user terminal identifier included in the second message; transmitting a third message to the radio base station, wherein the third message includes a user terminal identity, and wherein the third message is transmitted over the identified radio resource, and wherein the third message is scrambled using the determined first uplink scrambling sequence; and receiving a fourth message from the radio base station, wherein the fourth message includes a user terminal identity.