Various aspects of the present disclosure relate to a UE that receives a group RRC release message that is based on a group mobility configuration, the group RRC release message intended for communication to a group of multiple UEs. The UE can switch to a RRC inactive state based in part on a determination that a RRC connection suspend configuration directed to the UE is included in the group RRC release message. The UE can switch to a RRC idle state based in part on a determination that the RRC connection suspend configuration is not included in the group RRC release message. A network entity can generate the group RRC release message with the group mobility configuration, and the group RRC release message is intended for communication to the group of multiple UEs. The network entity can then transmit the group RRC release message to the group of multiple UEs.

Various aspects of the present disclosure relate to a user equipment (UE) that receives first control signaling indicating position information associated with a non-terrestrial station (NTS), the position information including an altitude of the NTS, a distance between the NTS and the apparatus, and/or an indication of a timing delay between the NTS and the apparatus. The UE also receives second control signaling indicating a first configuration identifying a first reference signal occasion. The UE determines a temporal range of an expected reference signal time difference duration based in part on the position information and the first configuration, and receives a reference signal during the temporal range of the expected reference signal time difference duration.

Various aspects of the present disclosure relate to a location server that transmits a control signaling request to a NTS in a non-terrestrial network, the control signaling requesting an entity type of the NTS, and ephemeris data associated with the NTS. The location server may transmit a control signaling request to a non-terrestrial network configuration entity in the non-terrestrial network, the control signaling requesting an identifier of the NTS, an entity type of the non-terrestrial network configuration entity, and/or a number of non-terrestrial network nodes communicatively connected to the non-terrestrial network configuration entity. The location server receives a control signaling response from the NTS and/or the non-terrestrial network configuration entity, the control signaling response indicating configuration parameter values. The location server then configures positioning assistance data for positioning a UE based in part on the configuration parameter values received in the control signaling response.

A method and device for transmitting and receiving signals in a wireless communication system according to an embodiment of the present invention receive Random Access Channel (RACH) configurations, and transmit random access preambles on a specific RACH occasion (RO) on the basis of the RACH configurations. The number of reference points in a cell is derived on the basis of the number of the RACH configurations, and the reference points can have respective initial Timing Advance (TA) values for the RACH process.

Various arrangements for performing dynamic resource blanking on a cellular network to prevent satellite communication interference are provided. Interference modelling can be provided by a satellite operator that operates a satellite. A cellular network can receive orbital data for the satellite. Based upon the orbital data for the satellite and the interference modelling, the cellular network can blank physical resource blocks (PRBs) for uplink communication with various base stations.

A mobile relay apparatus includes a first signal reception unit, a storage unit, and a second signal transmission unit. The first signal reception unit receives a first signal wirelessly transmitted by a first communication apparatus. The storage unit stores waveform data indicating a waveform of the first signal. The second signal transmission unit wirelessly transmits a second signal indicating the waveform data stored in the storage unit at a timing at which communication with the second communication apparatus is possible. The second communication apparatus includes a second signal reception unit, a second signal reception processing unit, and a first signal reception processing unit. The second signal reception unit receives a second signal. The second signal reception processing unit performs processing of receiving the second signal to acquire waveform data. The first signal reception processing unit performs processing of receiving the first signal indicated by the waveform data to acquire data set in the first signal by the first communication apparatus.

The present specification relates to an apparatus and method for performing random access. This specification discloses a method for performing random access by a terminal in a non-terrestrial network system, the method comprising the steps of: performing a search for a cell of a non-terrestrial network on the basis of a synchronization signal block transmitted from a non-terrestrial network node; after the search for the cell is completed, receiving, from the non-terrestrial network node, random access-related information about the cell of the non-terrestrial network; generating a random access preamble on the basis of a frequency resource area of a random access channel related to the cell of the non-terrestrial network; and transmitting the generated random access preamble to the non-terrestrial network node. Performance degradation can be reduced when random access is performed in a non-terrestrial network system.

A communication method and a communication apparatus are provided. In the communication method provided in embodiments of this application, a first device determines a first link resource, where the first link resource is used for sending information to a first terminal by the first device; and the first device determines a second link resource, where the second link resource is used, by the first device, for receiving information sent by a second terminal, where the first link resource has a same frequency resource as the second link resource.

Satellites provide connectivity in remote and rural areas as well as providing applications and services elsewhere on earth and in space. Existing satellite networks will be increasingly augmented by ultra-dense deployments of interconnected satellites providing low Earth orbit (LEO) constellations. However, such satellites only offer short-term line-of-sight access requiring ongoing handovers during the duration of a terminal’s access. Accordingly, to exploit these LEO constellations the inventors have established methodologies exploiting distributed massive multiple-input multiple-output technology for a user terminal to be connected to a cluster of LEO satellites. Further, distributed joint power allocation and handover management techniques are outlined for improving the power allocation and handover management processes in a cross-layer manner such that enhanced network throughput and reduced handover rate are provided whilst taking into account quality-of-service demands of terminals and the power capabilities of the LEO satellites.

A relay apparatus includes a reception unit, a storage unit, and a transmission unit. The reception unit receives data wirelessly transmitted by a first communication apparatus through a plurality of first antennas. The storage unit wirelessly transmits the data received by the reception unit to a second communication apparatus through a plurality of second antennas. The second communication apparatus includes a relay data reception unit. The relay data reception unit receives data wirelessly transmitted by the relay apparatus through a plurality of third antennas.