FIELD: physics, computer engineering.
SUBSTANCE: invention relates to a network node and a method of identifying a serving GPRS support node of a mobile station performed in the network node. The method comprises the following steps: acquiring (301) a Temporary Link Layer Identifier, TLLI, and identifying (302) the serving GPRS support node (130) of the mobile station (140) by deriving the identification data of the serving GPRS support node (130) from the acquired (301) TLLI, wherein the TLLI is acquired (301) when the mobile station (140) accesses a circuit switched domain.
EFFECT: high efficiency in a wireless communication system.
26 cl, 7 dwg
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