A serving base station transmits to a target base station a first message comprising a parameter indicating whether a wireless device supports an enhanced physical downlink control channel (ePDCCH). The serving base station receives from the target base station a second message comprising parameters indicating: a configuration of a subset of subframes in which first radio resources of a first ePDCCH are configured; and a starting OFDM symbol of the first ePDCCH in the subset of subframes. The serving base station transmits a third message to the wireless device comprising the configuration information of the first ePDCCH.

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4.sup.th-Generation (4G) communication system such as Long Term Evolution (LTE). The present invention relates to a method and apparatus for anchoring of a terminal in a wireless communication system. The method for anchoring the terminal in the wireless communication system may include receiving attribute information indicating whether at least one gateway operating as an anchor for at least one default Packet Data Network (PDN) connection supports session persistence, detecting a new flow generated by an application, determining whether a further PDN connection is required for the flow on the basis of the attribute information indicating whether at least one gateway supports session persistence, and if no further PDN connection is required for the flow, using an Internet Protocol (IP) address allocated by the at least one gateway as a source IP address of the flow.

A method and apparatus for performing switching control between uplink (UL) and sidelink (SL) in a wireless communication system is provided. A user equipment (UE) receives control information for a transmission direction of a specific type of communication from a network, and determines one of the UL or the SL as the transmission direction of the specific type of communication based on the control information. The specific type of communication may correspond to vehicle-to-everything (V2X) communication.

A system for converging fifth generation (5G) communication systems for supporting higher data rates beyond fourth generation (4G) systems with a technology for Internet of things (IoT) is provided. The communication method and system may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A system is provided for determining system information validity by acquiring and storing a first system information block and other system information, including information on a public land mobile network (PLMN) identity and a value tag, and determining whether the stored system information is valid for the cell. As another example, a terminal and base station are provided for performing beam failure detection and a recovery procedure using first and second configuration information for beam failure recovery (BFR) and if failure is detected, initiating a first random access (RA) procedure and if second configuration information is received while the first RA procedure is ongoing, terminating the first RA procedure and initiating a second RA procedure based on the second configuration information.

A UE and a method for handling a cell reselection procedure are provided. The method receives, from a camped cell, information related to the cell reselection procedure. The method determines whether the camped cell operates on a first frequency range for a Non-Terrestrial Network (NTN) operation. The method performs a measurement, for the cell reselection procedure for selecting a suitable cell, based on the information related to the cell reselection procedure after determining that the camped cell operates on the first frequency range for the NTN operation.

Wireless communications systems and methods related to system information communications and decoding are provided. In one embodiment, a wireless communication device receives one or more known bits. The wireless communication device receives a first encoded information block. The wireless communication device decodes the first encoded information block to generate a first information block based on the one or more known bits. In one embodiment, a wireless communication device receives a first encoded information block including a first bit pattern. The wireless communication device receives a second encoded information block including a second bit pattern. The wireless communication device jointly decodes the first encoded information block and the second encoded information block based on an assumption that a difference between the first bit pattern and the second bit pattern is within a subset of a plurality of bit-change patterns.

A method and apparatus for accessing a random access channel (RACH) during handover are disclosed. A handover procedure is initiated and a maximum handover interruption timer is activated. A dedicated preamble is transmitted in an attempt to access the RACH on a condition that the dedicated preamble is reserved in a current random access opportunity and the maximum handover interruption timer has not expired. A contention-based preamble is transmitted in an attempt to access the RACH on a condition that a dedicated preamble is not reserved in a current random access opportunity. If the maximum handover interruption timer has expired, a contention-based preamble is transmitted in an attempt to access the RACH.

A wireless device triggers a sidelink scheduling request (SR) procedure based on sidelink data becoming available while operating in a first sidelink resource allocation mode. The wireless device determines a failure of the sidelink SR procedure based on determining a non-configuration or a deactivation of a resource for transmission of a SR of the sidelink SR procedure, and switches to a second sidelink resource allocation mode in response to the failure of the sidelink SR procedure.

Methods, apparatuses, and systems for wireless communications are described. A base station may send a message with configuration parameters to a wireless device, and the configuration parameters may be for at least two different types of carriers used for communications.

The invention relates to an improved handover procedure for a mobile terminal. Under control of the target base station, the mobile terminal is to perform a handoff to a target base station, wherein it is to be configured for communication with the target base station via a target radio cell comprising a downlink carrier and an uplink carrier. The mobile terminal receives a handoff command message for the handoff to the target base station including a handoff execution condition as trigger for executing handoff to the target base station. Then, the mobile terminal determines, based on the received handoff execution condition, whether or not the mobile terminal is to trigger execution of the handoff to the target base station. In case the mobile terminal determines that it is to trigger execution of the handoff to the target base station, the mobile terminal executes the handoff to the target base station.