MOBILE COMMUNICATION SYSTEM, SGW, TERMINAL, METHOD OF RECEIVING MOBILE COMMUNICATION SYSTEM, METHOD OF RECEIVING SGW AND METHOD OF RECEIVING TERMINAL Russian patent published in 2018 - IPC H04W36/12 

FIELD: radio engineering and communications.

SUBSTANCE: invention relates to mobile communication. Mobile communication system includes UE (45), MME (25), SGSN (27) and SGW (15). SGW (15) includes a device to send a downlink data notification message to the MME (25) and SGSN (27) when the ISR is active in UE (45), MME (25), SGSN (27) and SGW (15), and when the bearer modification request message is received from another MME (35) or another SGSN (37) other than those mentioned MME (25) and SGSN (27), resend the downlink data notification message to only another MME (35) or another SGSN (37) sending the bearer modification request message.

EFFECT: technical result is to ensure a reliable reception of the downlink data packet that is sent during the UE movement.

12 cl, 12 dwg