Point-to-multipoint mobile radio transmission

Abstract

A method of operating a mobile communication system-supporting data transmission between a mobile station (MS) and a network in a number of different packet data protocols (PDPs) including a point-to-multipoint-multicast (PTM-M) protocol. PDP data is formatted and unformatted by a sub-network dependent convergence protocol (SNDCP) according to the PDP of data. The PDP is identified to the SNDCP by a protocol identifier transmitted between the network and the mobile station. In order to allow a MS to receive a PTM-M in an IDLE state, a unique protocol identifier is permanently assigned to PTM-M transmissions whilst other identifiers are dynamically assigned to other PDPs by the network.

1 . Method comprising:
 storing a permanently allocated protocol identifier in a mobile communication device;   identifying a matching protocol identifier in a transmission from a mobile communication network to the mobile communication device after powering on the device but before the mobile communication network becomes aware of the device due to the device operating in an IDLE state; and   in response to the identifying step, the mobile communication device receiving and processing the transmission.   
     
     
         2 . A method of operating a mobile communication device comprising the steps of
 receiving a transmission from a mobile communication network wherein the network is unaware of the communication device due to the communication device operating in an IDLE state;   processing the transmission; and   after the processing step, establishing communication between the communication device and the network so that the communication device becomes known to the network and so that the network is capable of tracking the device.   
     
     
         3 . A mobile communication device comprising:
 a stored identification code for receiving and processing a transmission from a transmitter in a mobile communication network wherein the mobile communication network is unaware of the device due to the device operating in an IDLE state, the transmission containing a code matching the stored identification code.   
     
     
         4 . A mobile communication device comprising:
 at least two modes of operation including a first mode, wherein the device is tracked by a mobile communication network due to the device operating in a STANDBY state, and a second mode, wherein the mobile communication network is unaware of the device due to the device operating in an IDLE state; and   a stored identification code for receiving and processing a transmission from the mobile communication network when the device is operating in the second mode, the receiving and processing step performed only if the transmission contains an identification code matching the stored identification code.   
     
     
         5 . A mobile communication device comprising:
 a first mode of operation wherein the device is in a STANDBY state and is capable of being tracked by a mobile communication network;   a second mode of operation wherein the device is in an IDLE state and is not known to the mobile communication network;   memory for storing a first type identification code dynamically allocated by the network and provided by the network to the device for identifying and processing a first type transmission from the network, the first type transmission specifically intended for the device when the device is in the first mode of operation; and   the memory also for storing a second type identification code permanently allocated by the network, the second type identification code for identifying and processing a second type transmission from the network when the device is in the second mode of operation.