FIELD: communications.
SUBSTANCE: to achieve the effect, a step is provided in which a first message is transmitted to the core network node, which includes the Transport Network Layer, TNL, address for the downlink tunnel. The method further includes receiving from the core network node a response message that includes an uplink transport layer UL address corresponding to a TNL address for a downlink tunnel.
EFFECT: possibility of identifying two tunnels, which were established in one session of the protocol data unit (PDU), to distinguish them into “first” and “additional”.
24 cl, 12 dwg, 5 tbl
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