Methods and arrangements for establishing a radio connection in a communication system

摘要

This invention pertains in general to the field of establishment of radio connection in a communication system. More particularly the invention relates to establishing a radio connection in a communication system. By broadcasting Random Access Channel related system information, user equipments can send a RACH request and receive a set of DL demodulation reference signals associated with a DL control channel.

主权项

1. A method, in a first Radio Base Station (RBS), for communicating radio connection establishment information using Orthogonal Frequency Division Multiplexing (OFDM) to a plurality of User Equipment (UE), the method comprising:
broadcasting system information on a Broadcast Channel (BCH) using a Multicast Broadcast Single Frequency Network (MBSFN) radio transmission format to the plurality of UEs, wherein the system information is related to establishing a radio connection between the first RBS and at least one UE out of the plurality of UEs, and wherein the broadcasting is performed synchronously in time with broadcasting the same system information on BCH using MBSFN radio transmission format by at least a second RBS; receiving a radio connection establishment request from a UE of the plurality of UEs; performing measurements of the radio connection establishment request as received from the UE; sending information related to the measurements of the radio connection establishment request to the second RBS or a central controller; obtaining a set of Downlink (DL) demodulation reference signals associated with a DL control channel for the UE; transmitting, to the UE, a radio connection establishment response comprising the set of DL demodulation reference signals associated with the DL control channel.