Telefonaktiebolaget Lm Ericsson (publ)

Martin Bäckström

Anders P Larsson

Thomas Walldeen

Dick Sven Andersson

Ulf Olsson

Patrik Cerwall

David Bladsjö

Anders Larsson

The invention concerns methods, a device and computer program products for simplifying handover back to a restricted local access point from an unrestricted global access point as well as to a device implementing a restricted local access point for provision in a wireless network and a wireless network. In the network a restricted local access point hands over a mobile station to an unrestricted global access point and provides data enabling the restricted local access point to be identified as a candidate access point. A device for simplifying handover back determines that the restricted local access point is a candidate for further handover based on this data and informs the mobile station about the restricted local access point via the unrestricted glob access point. Thereby hand over may be considered also to the restricted local access point in addition to other surrounding access points.

Method and apparatus for providing access for a limited set of mobile stations to a restricted local access point

A voice-over-IP (VoIP) connection is established over a radio interface with a mobile radio station. A current radio condition for the VoIP connection is determined, and from that, a modulation and coding scheme (MCS) for a portion of the VoIP connection. A VoIP voice encoding mode for a portion of the VoIP connection is selected based on the determined modulation coding scheme. VoIP voice is then encoded into a number of VoIP encoded frames using the selected VoIP voice encoding mode which has an associated bit rate. An optimal number of VoIP encoded frames is included in a VoIP packet for transport over the VoIP connection given the selected voice encoding mode and the selected MCS. Other adjustments may be made to ensure robustness of the VoIP connection and/or to maximize capacity.

Enhanced VoIP media flow quality by adapting speech encoding based on selected modulation and coding scheme (MCS)

Handover in a wireless network back to a restricted local access point from an unrestricted global access point

A telecommunications network comprises a base station node () which provides plural sets of radio transmission resources () for communicating with mobile stations () in a cell (). At least one set () of radio transmission resources of the cell is a non-hopping set of radio transmission resources including a resource which may carry the BCCH, and other sets (-) of radio transmission resources of the cell are hopping sets of radio transmission resources. A base station controller () node schedules calls comprising voice over internet protocol packet flows on the non-hopping sets of radio transmission resources in accordance with capacity of the non-hopping set of radio transmission resources. When the non-hopping set of radio transmission resources lacks capacity for a further call with a mobile station, the base station controller () node requests that the call be changed from a voice over internet protocol packet flow to a circuit switched connection.

Connection type handover of voice over internet protocol call based on resource type

A method of processing user speech data for transmission to a participant or participants in a Push to talk Over Cellular (PoC) session over a cellular telephone network. The method comprises, detecting an initial period of silence in the initial talk burst of the session, and removing that period of silence from the speech data prior to replaying of the speech data to the or each other participant. These signal processing steps may be carried out at one of the initiating terminal, the receiving terminal, or the IMS core.

Reducing latency in push to talk services

A method and apparatus for providing a call circuit connection between a mobile station and a remote application host is disclosed. Once a call circuit connection is initially established between a mobile station and remote application host to enable data to transfer therebetween, the call circuit connection is monitored for detection of an idle condition. Upon detection of the idle condition, identifying information for the call circuit connection is stored, and a first portion of the call circuit connection is disconnected while maintaining a second portion of the connection. Upon a request for reconnection of the call circuit connection, the first portion of the call circuit connection is reestablished with the second portion to enable continued data transfer.

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Danderyd, Sweden

Martin Bäckström