Methods and apparatus for communicating circuit switched voice data with a first cellular radio access network (RAN) and communicating voice over Internet protocol (VoIP) packets using session initiation protocol (SIP) with a second cellular RAN. The second cellular RAN does not support circuit switched voice communication.

Methods and apparatus for communicating circuit switched voice data with a first cellular radio access network (RAN) and communicating voice over Internet protocol (VoIP) packets using session initiation protocol (SIP) with a second cellular RAN. The second cellular RAN does not support circuit switched voice communication.

The present disclosure relates to base station and method for content synchronization when broadcasting data in a communications network. The base station comprises a receiver configured to receive data sequences and a transmitter configured to transmit content of the received data sequence. Each data sequence comprises a packet level sequence number and byte-numbered sequence numbers. The base station further comprises a processing circuitry configured to synchronize transmission with another base station of the content using said packet level sequence number and said byte-numbered sequence numbers.

A 3D MIMO based radio transmission method, comprising: establishing a communication connection between a base station pre-configured with an active antenna array and a user equipment terminal, and establishing a 3D MIMO channel model; when some active antennas in the active antenna array have failed, automatically reconfiguring the active antenna array to realise redundancy; and generating a 3D pre-coded matrix through the 3D MIMO channel model, so as to form a beam forming vector having a high resolution in two dimensions and obtain a multi-user multiplexing gain.

Systems and methods for handovers with simplified network topology are disclosed. In a first embodiment, a method is disclosed, comprising: at a coordinating gateway during a handover of a mobile device from a first base station to a second base station, receiving a first handover request from the first base station; discarding a first shared security key received in the first handover request; sending a tunnel switching request to a core network node; obtaining precursors for a second shared security key from the core network node in a response to the switching request; sending a second handover request to the second base station with the precursors to calculate the second shared security key for securing a data connection for the mobile device following the handover; deriving the second shared security key from the obtained precursors at the first base station; and deriving the second shared security key from the obtained precursors at the coordinating gateway.

A method includes determining configuration information of a preset data bearer, where the preset data bearer is used to transmit data, and the configuration information comprises a data transmission mode of data transmitted over a radio interface through the preset data bearer. The method also includes sending the configuration information of the preset data bearer to a mobile terminal before establishment of a radio resource control (RRC) connection to the mobile terminal is completed, where the configuration information of the preset data bearer is used by the mobile terminal to transmit data through the preset data bearer.

In accordance to embodiments, methods, devices, and systems for determining initial transmissions in grant-free transmissions are disclosed. A UE receives a resource configuration for grant-free (GF) transmissions. The resource configuration comprises a periodicity parameter (P), a repetition number (K), and a sequence of redundancy version (RV) numbers corresponding to one or more RV types. The periodicity parameter defines a period having K transmission occasions (TOs), and each of the KTOs is associated with one RV number in the sequence of RV numbers. The UE performs an initial GF transmission of data in a TO of the K TOs in the period defined by the periodicity parameter. The TO is associated with an RV number corresponding to RV0.

In an approach to managing transmission frequency for a plurality of edge devices of an interconnected distributed network, one or more computer processors determine a maximum writing frequency, MWF, for the interconnected distributed network; iteratively process values of data flow writing frequency, DFWF, for a plurality of edge devices of an interconnected distributed network in accordance with an optimization algorithm based on the MWF to identify a convergence in the values of DFWF, wherein each iteration of processing values comprises, at each edge device in the plurality of edge devices, determine a value of DFWF based on an associated utility function of the respective edge device, wherein the utility function is a measure of utility of the device as a function of DFWF; responsive to identifying convergence, determine the converged values of DFWF to be optimal values of DFWF for the plurality of edge devices.

The present disclosure is directed to method in a mobility management node and such a node for delivering data to a wireless communication device (WCD) served by the mobility management node, operating in a communication network comprising a network entity (NE) and a radio access network (RAN) node serving the WCD, the method comprises: obtaining capability information indicating whether the RAN node supports acknowledgement of a successful delivery of data to the WCD; receiving a data message sent by the NE comprising user data intended for the WCD; sending a control plane message comprising the user data to the RAN node for further delivery to the WCD; sending a response to the NE indicating the outcome of the data delivery.

To provide a communication procedure for data transmission and/or reception suitable to a CIoT terminal. In a communication control method of a terminal apparatus according to the present invention, a first data transmission and/or reception method is a method for transmitting and/or receiving user data by use of a Data Radio Bearer (DRB), a second data transmission and/or reception method is a method for transmitting and/or receiving user data a Signalling Radio Bearer (SRB), and the communication control method includes a step of changing the user data transmission and/or reception method from the first data transmission and/or reception method into the second data transmission and/or reception method, and a step of transmitting and/or receiving the user data to/from a core network by the second data transmission and/or reception method.