Simplified PRACH procedure using speculative random access response

摘要

The present invention relates to method and arrangement in cellular mobile communication systems, in particular for handling of a physical random access channel for example in a Long Term Evolution communication network. By sending to at least one user equipment, UE, in a communication network cell an un-solicited speculative random access response, RAR, message comprising information relating to at least one of pre-amble identifier, allocated UE identifier, and uplink resource allocation data for L2/L3 message, it is possible to reduce the complexity of the access node, e.g. an eNodeB.

主权项

1. A network infrastructure access device in a wireless telecommunications network serving a wireless communication cell, wherein the device comprises:
at least one processor; at least one receiving unit; and at least one transmitting unit, wherein the at least one processor is arranged to:
send, using the transmitting unit, to at least one UE in the cell, a speculative random access response (RAR) message comprising a preamble identifier based on detection of a presence of the preamble from a signal on a physical random access channel (PRACH) signal received using the receiving unit from the at least one UE, wherein the preamble identifier is determined independent of an identity of a preamble transmitted by the at least one UE to the network infrastructure access device; andreceive, using the receiving unit, an L2/L3 message from the at least one UE comprising an allocated UE identifier and an UE identity.