RANDOM ACCESS PROCEDURE AND RELATED APPARATUS

摘要

A new random access procedure is introduced that does not use a timing advance for the uplink timing but instead uses the downlink timing for uplink timing. This is particularly viable when the propagation delay is short, for example with local area cells having a coverage range less than some predetermined threshold. From the mobile terminal's perspective it obtains downlink timing for a cell, transmits a scheduling request SR in a contention-based uplink resource, and in response to receiving an uplink resource allocation it transmits in the allocated uplink resource using the downlink timing. The terminal can get the configuration for that contention-based uplink resource from system information. From the uplink resource the terminal and network determines a SR-RNTI, which the network uses to address the uplink resource allocation and the terminal uses to find a pre-defined search space in which to look for that uplink resource allocation.

主权项

1. A method for operating a wireless network, comprising:
utilizing a first random access procedure to connect users to cells of a first type, wherein the first random access procedure provides to the users connecting to cells of the first type a timing advance for finding uplink timing from a known downlink timing and the first type is characterized by having a coverage range greater than a predetermined threshold; and utilizing a second random access procedure to connect users to cells of a second type, wherein the second random access procedure utilizes known downlink timing for the uplink timing and the second type is characterized by having a coverage range less than a predetermined threshold.