Adaptive service areas for multicast session continuity
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsJoakim Åkesson, Erik Stare, Jie Ling
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Abstract
Systems and methods are disclosed herein for providing adaptive service areas for multicast session continuity. Embodiments of a method performed by a radio access node in a Radio Access Network (RAN) are disclosed. Such embodiments introduce mobility of User Equipments (UEs) participating in a multicast/broadcast service, which is managed by the RAN. This means that the broadcast area will dynamically adapt as participating UEs move and/or radio conditions change.
Claims29
A method performed by a first radio access node in a Radio Access Network, RAN, for providing adaptive service areas in a multicast transmission session, the method comprising:
- participating in a multicast transmission session for a service, comprising a multicast stream currently transmitted at least by the first radio access node to one or more User Equipment, UE, in a first cell;
- providing, when a RAN decision is made to include cells of the first radio access node in the transmission of the service, a preparation notification to a second radio access node neighboring the first radio access node to prepare for mobility of the one or more UE to the neighbor second radio access node, the preparation notification comprising session information to prepare for the multicast transmission session for the service;
- and
- deciding to include the second radio access node in the multicast transmission session, deciding to include the second radio access node in the multicast transmission session being based on a radio condition in the RAN comprising the first radio access node and the second radio access node, the radio condition including a signal strength for a UE having a Temporary Mobile Group Identity, TMGI, associated with the multicast transmission session.
A method performed by a second radio access node in a Radio Access Network, RAN, for adaptively joining a multicast stream, the method comprising:
- receiving, when a RAN decision is made to include cells of the first radio access node in the transmission of the service, a preparation notification from a neighboring first radio access node in the RAN to prepare for mobility of one or more UE from the neighbor first radio access node, the preparation notification comprising session information to prepare for a multicast transmission session for a service having a multicast stream transmitted at least by the first radio access node to said one or more UE in a first cell;
- joining the multicast transmission session using the session information;
- transmitting the multicast stream for the service to one or more User Equipment, UE, in a second cell of the second radio access node;
- and
- deciding to include the second radio access node in the multicast transmission session, deciding to include the second radio access node in the multicast transmission session being based on a radio condition in the RAN comprising the first radio access node and the second radio access node, the radio condition including a signal strength for a UE having a Temporary Mobile Group Identity, TMGI, associated with the multicast transmission session.
A radio access node in a cellular Radio Access Network, RAN, for adaptively changing multicast areas in a multicast transmission session, the radio access node comprising:
- a radio interface;
- and
- processing circuitry configured cause the radio access node to:
- participate in a multicast transmission session for a service, comprising a multicast stream currently transmitted at least by the first radio access node to one or more User Equipment, UE, in a first cell;
- provide, when a RAN decision is made to include cells of the first radio access node in the transmission of the service, a preparation notification to a second radio access node neighboring the first radio access node to prepare for mobility of the one or more UE to the neighbor second radio access node, the preparation notification comprising session information to prepare for the multicast transmission session for the service;
- and
- decide to include the second radio access node in the multicast transmission session, deciding to include the second radio access node in the multicast transmission session being based on a radio condition in the RAN comprising the first radio access node and the second radio access node, the radio condition including a signal strength for a UE having a Temporary Mobile Group Identity, TMGI, associated with the multicast transmission session.
Dependencies are inferred from the claim text.