Telefonaktiebolaget Lm Ericsson (publ)

Joakim Åkesson

Paul Schliwa-Bertling

Magnus Tränk

Thorsten Lohmar

Henrik Enbuske

Alexander Vesely

Ali El Essaili

Jörg Huschke

Dung Pham Van

Martin Van Der Zee

Yunpeng Zang

Kenneth Balck

Maciej Muehleisen

Micael Martell

Salvador Hinarejos Fernandez

John Camilo Solano Arenas

Jinyang Xie

Jie Ling

Erik Stare

Sanne Stijve

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.

Adaptive service areas for multicast session continuity

Disclosed herein is a method performed by an IOPS application function, AF, to provide a group communication service. The method comprises: establishing an IOPS MBMS bearer, the IOPS MBMS bearer being an MBMS bearer within a MBSFN area served by one or more radio access nodes that are operating in an IOPS mode of operation; discovering one or more UEs via an IOPS discovery procedure; sending to the one or more UEs, an MBMS bearer announcement for the IOPS MBMS bearer.

MBMS support on IOPS

In accordance with particular embodiments, a method, performed by a control node, for multimedia broadcast multicast service, MBMS, bearer setup in a group communications system comprises activating and announcing an MBMS bearer to the client nodes. The MBMS bearer is independent of any particular group of client nodes. The method also includes obtaining a call setup message for a group call from a first client node of the client nodes. The method additionally includes broadcasting a connect message for the group call to at least one other client node of the client nodes in response to having received the call setup message. In accordance with certain embodiments, a method, performed by a client node, for MBMS bearer setup in a group communications system comprises obtaining a service announcement of an MBMS bearer from a control node. The MBMS bearer is independent of any particular group of client nodes. The method additionally includes providing a call setup message for a group call to the control node in response thereto.

MBMS bearer setup in a group communications system

Disclosed herein is a method for reporting existence of an isolated radio access network and a wireless device and a radio base station for performing the method. The method comprises: performing communications in an isolated radio access network, the isolated radio access network being a radio access network provided by one or more first radio base stations that do not have connectivity to a centralized core network of a cellular communications network; attaching to a second radio base station, the second radio base station having connectivity to the core network; and providing, to a centralized communications server via the second radio base station, one or more messages that inform the centralized communications server of the existence of the isolated radio access network.

Isolated E-UTRAN operations for public safety (IOPS) awareness with multimedia broadcast multicast services (MBMS)

A mobile device () subscribes to receive messages targeted to a first geographical area (-A), e.g., a first tile or area of a grid for geocasting. The mobile device () also subscribes to receive messages targeted to a second geographical area (-B), e.g., a second tile or area of the grid for geocasting. The mobile device () notably does this such that the mobile device () is simultaneously subscribed to receive messages targeted to the first geographical area (-A) and to receive messages targeted to the second geographical area (-B).

Geographical area message distribution

Systems and methods for auto creation of Multicast-Broadcast Single Frequency Network (MBSFN) areas are disclosed. In some embodiments, systems and methods are disclosed for providing different MBSFN area pattern types for different cell coverage and density conditions for better resource usage. In some embodiments, systems and methods are disclosed for providing tools to a customer to plan MBSFN broadcast areas and to automatically generate MBSFN Hexagon areas and allocate a proper MBSFN area pattern for the MBSFN Hexagon areas to avoid manual configuration of the MBSFN area for each cell. In some embodiments, systems and methods are disclosed for providing a solution to help network operators to remote set MBSFN areas' configuration to a network wide Radio Access Network (RAN). In some embodiments, systems and methods are disclosed for providing tools to present cells, cell range, MBSFN area locations, and configurations and enhanced or evolved Node Bs' (eNBs') relationship.

MBSFN area patterns to automatically handle resource allocations without conflict

A method, by a control node, for MBMS bearer handling comprises activating and announcing a first MBMS bearer for supporting floor control in a group call to client nodes of the group call. The method additionally includes activating and announcing at least one second MBMS bearer for supporting media transmission in the group call. The floor control and the media transmission are supported on separate MBMS bearers for the group call. A method, by a client node for MBMS bearer handling comprises obtaining a broadcast service announcement of a first MBMS bearer for supporting floor control in a group call from a control node of the group call. The method additionally includes obtaining a broadcast service announcement of at least one second MBMS bearer for supporting media transmission in the group call from the control node. The floor control and the media transmission are supported on separate MBMS bearers for the group call.

MBMS bearer handling in a group communications system

There is provided mechanisms for service interruption reporting of a multicast bearer for group communications. A method is performed by a client node. The method comprises obtaining instruction from a control node of the multicast bearer, where the instruction instructs whether or not the client node is to report service interruption of the multicast bearer. The method comprises detecting service interruption of the multicast bearer. The method comprises selectively reporting the service interruption to the control node in accordance with the instruction.

Service interruption reporting

The disclosure relates to methods at a wireless communication system, a wireless communication device, a network communication node, and a control node, respectively, for bearer control in a wireless communication system (). Specifically, the method comprises determining (S), by the WCD or the network communication node, whether the number of radio bearers concurrently active for the WCD is at least one of equal to a threshold value and above the threshold value. If the threshold is reached, then the WCD or the network communication node transmits (S), towards the control node (), a first status message indicative of that the number of radio bearers concurrent active has reached the threshold value. The first status message is received by the control node and in response to the reception (S) of the message the control node determines (S), based on the first status message, whether an MBMS bearer is to be activated. Further, when it is determined (S) that the MBMS bearer is to be activated, the control node activates (S) the MBMS bearer. Corresponding computer programs, computer program products, arrangements, and devices are also disclosed.

Mitigation of shortage of unicast bearers in a wireless communication system

There is provided mechanisms for paging at least one client node in a group communications system. A method is performed by a control node of the group communications system. The method comprises obtaining a need for paging the at least one client node in the group communications system. The method comprises transmitting a paging message for the at least one client node on a multimedia broadcast multicast service (MBMS) bearer to the at least one client node. There is also provided a control node configured to perform such a method. There is also provided mechanisms for receiving paging in a group communications system.

Paging in a group communications system

A method for a public information system, adapted for broadcasting a message in a first wireless access network. The first wireless access network is arranged to, at least partly, overlap one or more further wireless access networks. The method comprises initiating a modified support announcement by the first wireless access network. The modified support announcement configured to announce support for the further wireless access networks by comprising network identifiers associated with the further wireless access networks, whereby a wireless device associated with a further wireless access network is prompted to connect to the first wireless access network, and initiating broadcasting of the message over the first wireless access network, whereby said wireless device may receive the message over the first wireless access network.

Public information system

There is provided mechanisms for multimedia broadcast multicast service (MBMS) bearer handling in a group communications system. A method is performed by a control node. The method comprises obtaining a need for a new MBMS bearer to be activated. The method comprises activating the new MBMS bearer. The method comprises announcing MBMS bearer identity and complementary service announcement information of the new MBMS bearer on an already announced MBMS bearer, thereby announcing the new MBMS bearer.

Growing community of inventors

Landvetter, Sweden

Joakim Åkesson