Technique for performing a random access procedure over a radio interface

A method by a radio base station for performing a random access procedure over a radio interface, the method comprising:

• receiving, from a mobile terminal, a synchronization request for synchronization information;
• transmitting, to the mobile terminal based on the synchronization request, the synchronization information;
• receiving, from the mobile terminal and based on at least one uplink transmission parameter adjusted according to the synchronization information, a resource request for data transmission resources for uplink communications between the mobile terminal and the radio base station;
• and
• starting a synchronization timer in response to at least one of the reception of the synchronization request, the reception of the resource request, and a reception of uplink data, wherein the expiry of the synchronization timer has been set according to a prediction of a validity of the synchronization information.

A non-transitory computer readable recording medium storing a computer program product comprising program code portions that is executed on one or more computing devices to cause the one or more computing devices to:

• transmitting, to a radio base station, a synchronization request for synchronization information;
• receiving, from the radio base station, the synchronization information in response to the synchronization request;
• transmitting, based on at least one uplink transmission parameter adjusted in accordance with the synchronization information, a resource request for data transmission resources for uplink communications between the mobile terminal and the radio base station;
• and
• starting a synchronization timer in response to at least one of the reception of synchronization information and the transmission of data, wherein the expiry of the synchronization timer has been set according to a prediction of a validity of the synchronization information.

A mobile terminal for performing a random access procedure over a radio interface, the mobile terminal comprising:

• one or more processors coupled to a memory, the one or more processors configured to:
• transmit, to a radio base station, a synchronization request for synchronization information;
• receive, from the radio base station, the synchronization information in response to the synchronization request;
• transmit, based on at least one uplink transmission parameter adjusted in accordance with the synchronization information, a resource request for data transmission resources for uplink communications between the mobile terminal and the radio base station;
• and
• start a synchronization timer in response to at least one of the reception of synchronization information and the transmission of data, wherein the expiry of the synchronization timer has been set according to a prediction of a validity of the synchronization information.

A radio base station for performing a random access procedure over a radio interface, the base station comprising:

• one or more processors coupled to a memory, the one or more processors configured to:
• receive, from a mobile terminal, a synchronization request for synchronization information;
• transmit, to the mobile terminal based on the synchronization request, the synchronization information;
• receive, from the mobile terminal and based on at least one uplink transmission parameter adjusted according to the synchronization information, a resource request for data transmission resources for uplink communications between the mobile terminal and the radio base station;
• and
• start a synchronization timer in response to at least one of the reception of the synchronization request, the reception of the resource request, and a reception of uplink data, wherein the expiry of the synchronization timer has been set according to a prediction of a validity of the synchronization information.