FIELD: radio engineering, communication.
SUBSTANCE: invention relates to mobile communication. The technical result is achieved due to integration of collaboration session control with the session detection. The request for transfer of collaboration session control comprising the information on the current session is transmitted before session control transfer from one WTRU to another WTRU. The information on the current session can comprise the information on media flows and devices involved in the session. The response on media data control transfer is transmitted in response to the transfer request.
EFFECT: system optimisation and error tracking when transferring between the user devices (UE) (IUT) of collaboration session control and information on session between WTRUs.
15 cl, 7 dwg
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