Patent ID: 8310919

Claim:
A method for obtaining feedback from one or more wireless subscriber communication unit(s) related to a broadcast service in a wireless communication system comprising at least one communication cell, the method comprising: transmitting a request message by a network controller to one or more wireless subscriber communication unit(s), wherein the request message comprises a broadcast service identifier for the broadcast service as well as an indication of a dedicated signature sequence to be used for a random access channel (RACH) preamble by the one or more wireless subscriber communication unit(s) for responding to the request message; receiving and processing the request message by a wireless subscriber communication unit; transmitting a layer-1 response signal by the wireless subscriber communication unit on a non-synchronized random access channel (RACH) in response to the request message, wherein said response signal is a RACH preamble comprising the dedicated signature sequence for the broadcast service; and detecting by the network controller the layer-1 response signal in a particular communication cell, and in response thereto, performing at least one of the following: (i) entering a point-to-multipoint broadcast mode of operation; and (ii) modifying a delivery of the broadcast service in that communication cell.