Method and arrangement in a telecommunications system

A method, in a base station of a wireless communication system, for scheduling resources to a mobile terminal through a random access channel (RACH) procedure, said method comprising:

• receiving a service request from the mobile terminal via a random access preamble on a RACH uplink;
• allocating an initial resource to the mobile terminal for receiving a terminal buffer status report in return;
• and
• upon receiving a subsequent service request from the mobile terminal via the RACH, the subsequent service request including an indicator of a change of a present buffer status of a present buffer content of a mobile terminal buffer as compared to a previous buffer status of a previous buffer content of the mobile terminal buffer, allocating further uplink resources to the mobile terminal.

A base station configured for scheduling resources to a mobile terminal through a random access channel (RACH) procedure, said base station comprising:

• a processor unit;
• a memory unit;
• and
• a communication interface;
• wherein the processor unit is arranged to store a copy of a buffer status report (BSR) in the memory unit;
• wherein the processor unit is further arranged to grant an initial resource to the mobile terminal upon receipt of a first service request initiated via a first RACH procedure;
• and
• wherein the processor unit is further arranged to allocate uplink resources for data transmissions to the mobile terminal based on receipt of a second service request, initiated via a second RACH procedure, the second service request indicating a change of a present buffer status of a present buffer content of a mobile terminal buffer as compared to a previous buffer status of a previous buffer content of the mobile terminal buffer.

A mobile terminal configured for indicating a service request for resource allocation to a base station scheduler through a random access channel (RACH) procedure in a communication system, said mobile terminal comprising:

• a memory configured to store a previous buffer status of a previous buffer content;
• a processor unit, including:
• a data transmit buffer configured for buffering data to be transmitted in the communication system;
• a comparator configured for comparing a present buffer status of a present buffer content of a mobile terminal buffer with the previous buffer status of the previous buffer content;
• and
• a service request triggering mechanism configured for sending a single bit message on a random access channel to the base station scheduler, for triggering the base station scheduler to assign uplink resources for data transmission, when a change of the present buffer status is detected at said comparison;
• and
• a communication interface operatively associated with the processor unit.