293 results about "Cellular communication systems" patented technology

Systems and methods for carrier configuration and scheduling for Subband Full Duplex (SBFD) operation in cellular communications system are disclosed. In one embodiment, a method performed by a User Equipment (UE) comprises receiving, from a network node, information that configures one or more subbands within a bandwidth of a carrier for subband full duplex operation. The received information comprises first information that configures a cell-specific Time Division Duplexing (TDD) symbol pattern for the carrier, wherein the TDD symbol pattern comprises a set of symbols. The received information further comprises second information that configures, for each symbol from at least a subset of the set of symbols within the TDD symbol pattern, one or more subbands for subband full duplex operation within the symbol. The method further comprises operating in accordance with the received information.

Systems and methods related to authorization in a cellular communications system. In one embodiment, a method performed by a Network Function (NF) comprises sending, to another network function, information that indicates whether a particular type of authorization is required per Public Land Mobile Network (PLMN) for a particular NF service instance associated with the NF. In one embodiment, the other network function is a Network Repository Function (NRF). In one embodiment, the information is comprised in a NF profile of the NF. In one embodiment, the particular type of authorization is Oauth2-based authorization.

A cellular communication system supports a Network Relay Function (140) for managing the indirect connections. A mobile device (110) may send a request message to a relay device (120), the request message including a relay service code (associated with a set of privacy sensitive PDU session parameters). The relay device receives the request message and sends a transfer request message to the cellular communication system indicating a request to transfer data via an indirect connection and including the requested relay service code. The Network Relay Function receives the transfer request message, determines a different relay service code to be used instead of the requested relay service code; and sends a transfer response message including the different relay service code in an encrypted manner that allows it to be decrypted by the mobile device, but not the relay device; and forwarding by the relay device the encrypted different relay service code to the mobile device in a response to the request message.

Systems and methods for controlling the use of a network slice in a core network of a cellular communications system are disclosed. In one embodiment, a method comprises, at a first Network Function (NF) in a core network of a cellular communications system, sending, to a second NF associated with a first network slice, a first message that initiates transfer of one or more Protocol Data Unit (PDU) sessions of a User Equipment (UE) from the first network slice to a second network slice. The method further comprises, at the second NF, receiving the first message from the first NF and sending, toward the UE, a session management message that causes the transfer of the one or more PDU sessions of the UE from the first network slice to the second network slice.

Apparatuses, systems, and methods for a framework for user consent delivery and utilization in cellular communication systems. An access and mobility management function (AMF) of a network may obtain, from a user data management (UDM), user consent information via a user consent parameter included in a structured data type. The AMF may provide, to a base station of the network, the user consent information via a user consent information element. The user consent information element may be associated with at least one data type and the at least one data type may include radio link failure (RLF) information sharing consent and / or user location information sharing consent. The user consent information element may be included in any of an initial context setup request message, a user equipment (UE) context modification request message, and / or a handover request message.

Systems and methods are disclosed that related to Distributed Machine Learning (DML) or Federated Learning (FL) in core network of a mobile or cellular communications system. In one embodiment, a method performed by a server Network Data Analytics Function (NWDAF) for selecting one or more client NWDAFs comprises transmitting, to each of a set of client NWDAFs, a preparation request for DML or FL and receiving, from each of at least some of the set of client NWDAFs, a response to the preparation request for DML or FL. The method further comprises selecting one or more client NWDAFs based on the responses to the preparation requests for DML or FL. In this manner, the network is enabled to support DML or FL operations.

Systems and methods related to enhanced paging in a cellular communications system are disclosed. In one embodiment, a method performed by a User Equipment (UE) for paging monitoring comprises receiving an enhanced paging configuration from a network node, the enhanced paging configuration comprising a parameter that defines a number of paging occasions within a paging frame as one of a set of predefined values comprising at least one value that is greater than 4. The method further comprises monitoring for a paging message in accordance with the enhanced paging configuration. In this manner, paging configuration is enhanced to facilitate network energy savings and / or reduced impact on UE power savings.

The disclosure relates to a communication method for converging an IoT technology with a 5G communication system for supporting a higher data transfer rate beyond the 4G system; and a system therefor. The disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail business, security and safety services, etc.), based on 5G communication technologies and IoT-related technologies. A method and terminal are provided. The method includes receiving first sidelink control information (SCI) and first data corresponding to the first SCI, the first SCI including first priority information, receiving second SCI and second data corresponding to the second SCI, the second SCI including second priority information, identifying whether first feedback information associated with the first data or second feedback information associated with the second data is transmitted based on the first priority information or the second priority information when a resource for the first feedback information and a resource for the second feedback information are overlapped, and transmitting one of the first feedback information or the second feedback information which is associated with higher priority.

Systems and methods are disclosed herein for Quality of Experience (QoE) measurements handling at overload in a Radio Access Network (RAN) of a cellular communications system. In one embodiment, a method performed by a first RAN node for handling QoE measurement configuration and / or reporting during RAN overload comprises performing one or more actions related to one or more aspects of QoE measurement configuration, QoE measurement reporting, or both QoE measurement configuration and QoE measurement reporting that mitigate an RAN overload condition. In one embodiment, performing the one or more actions comprises performing one or more actions related to transfer of one or more aspects of QoE measurement configuration from the first RAN node to a second RAN node, transfer of one or more aspects of QoE measurement reporting from the first RAN node to the second RAN node, or both.

The invention discloses a method for selecting a node working mode of a cellular-free NAFD system in a low-altitude three-dimensional coverage scene, and belongs to the technical field of network communication. The method comprises the following steps: modeling a non-cellular communication system in a low-altitude three-dimensional coverage scene; analyzing a signal transmission model; analyzing the downlink spectral efficiency of the system using the RZF precoding; analyzing the spectrum efficiency of the uplink using the MMSE receiver; modeling is carried out on the optimization problem of the solved RRU working mode selection; and solving the optimization problem by using a deep Q-learning algorithm to obtain the uplink and downlink working modes suitable for all nodes. According to the invention, in a cellular network-assisted full-duplex communication system in a low-altitude three-dimensional coverage scene, proper node uplink and downlink working modes can be selected, the large downlink problem of an unmanned aerial vehicle user in the low-altitude three-dimensional coverage scene is effectively solved, resource waste is avoided, and possibility is provided for further development of a cellular network-free network in the low-altitude three-dimensional coverage scene.

This disclosure relates to performing data communication while in an inactive state in a cellular communication system.

A communication control method is used in a cellular communication system. The communication control method includes receiving, by a communication apparatus, from a relay node, a failure occurrence notification indicating occurrence of a failure in a backhaul link between the relay node and a parent node of the relay node, and starting, by the communication apparatus, a timer defining a time to wait for recovery from the failure in response to receiving the failure occurrence notification.

The described technology is generally directed towards network slice pre-configuration for cellular communication systems, including 5G and subsequent generation cellular communication systems. Network equipment can be preconfigured to identify whether a network slice identifier included in a network communication belongs to a group of network slice identifiers. If so, the network equipment can process the network communication either according to a network slice rule that corresponds specifically to the network slice identifier, or according to a default group network slice rule for the group to which the network slice identifier belongs. Different groups of network slice identifiers can be associated with different sets of group network slice rules which can be arranged to reduce the work of setting up network slice identifiers in various network slicing scenarios.

A cellular base station (BS) which transmits more flexible downlink control information (DCI) to the UE, and a UE capable of receiving and processing a received DCI message. The DCI message may have a DCI format of 0_1 or 0_2 and further may comprise an UL-SCH set to 0, a CSI request field of all 0s and an SRS request field having a nonzero value. The DCI message may indicate to the UE that the UE should: 1) transmit an aperiodic SRS corresponding to SRS request; and 2) that the UE should not transmit on the PUSCH. The DCI may include existing fields that specify either a slot offset or beam information useable when transmitting the aperiodic SRS. The base station may also generate a DCI message with an SRS trigger that is targeted to a plurality of UEs in a group, or a plurality of groups of UEs, for greater efficiency.

In an aspect, a communication control method is used in a cellular communication system. The communication control method includes transmitting, by a distributed unit (DU) to a central unit (CU), resource information regarding a resource used in a user equipment during an RACH-less handover, and transmitting, by the central unit to the user equipment, a handover command including the resource information.

A wireless terminal of a cellular telecommunication system communicates with a first cell served by a mobile base station relay. The wireless terminal comprises receiver circuitry and processor circuitry. The receiver circuitry is configured to receive, from the first cell, a reconfiguration message comprising second cell information including a cell identity and an operating frequency of a second cell and an indication indicating whether or not the first cell will be replaced by the second cell. The processor circuitry is configured to: (1) perform, based on the reconfiguration message, a handover procedure to handover to the second cell, and (2) perform a cell selection procedure in a case that the handover procedure fails. During the cell selection procedure, the first cell is not considered as a candidate in a case that the indication indicates that the first cell will be replaced by the second cell.

A communication control method according to one aspect is a communication control method used in a cellular communication system. The communication control method includes transmitting, at a base station to a user equipment, a conditional reconfiguration including permission information representing whether connection by RACH-less handover is permitted per target cell.

This disclosure relates to performing beam failure recovery during an inter-cell connection involving a UE in communication with one or more base stations in a cellular communication system. In various embodiments, a user equipment determines one or more beam failures by monitoring one or more reference signals transmitted by one or more base stations, where the UE is connected to the one or more base stations. The UE further performs candidate beam detection by monitoring at least one candidate reference signal that is transmitted by one or more candidate base stations, where at least one candidate base station (a first candidate base station) is different from the one or more base stations to which the UE was previously communicating. The UE selects the first candidate base station based on the candidate beam detection, and transmits a beam failure recovery request (BFRQ) message to the first candidate base station based on the selection.

Systems and methods for Phase Tracking Reference Signal (PTRS) to Demodulation Reference Signal (DMRS) association when two or more Transmission Configuration Indication (TCI) states are indicated for a Physical Downlink Shared Channel (PDSCH) transmission in a cellular communications system are disclosed. In one embodiment, a method performed by a WCD comprises receiving a Physical Downlink Control Channel (PDCCH) comprising Downlink Control Information (DCI) that indicates two Transmission Configuration Indication (TCI) states for a PDSCH transmission to the WCD and DMRS ports within a single Code Division Multiplexing (CDM) group. The method further comprises determining a PTRS port to DMRS port association for the PDSCH transmission, wherein a single PTRS port is used for the PDSCH transmission and determining the PTRS port to DMRS port association comprises determining that the single PTRS port is associated with a lowest indexed DMRS port in the DMRS ports indicated in the DCI.

Systems and methods are disclosed that relate to position assistance information in a Terrestrial Network (TN) cell that is used to obtain a position estimate of a User Equipment (UE) for use when performing an action(s) with respect to an Non-Terrestrial Network (NTN) cell(s). In one embodiment, a method performed by a UE for obtaining an estimate of a position of the UE in a cellular communications system comprises receiving position assistance information from a TN node on a TN cell and obtaining a position of the UE based on the position assistance information. The method further comprises performing one or more actions with respect to one or more NTN cells, based on the position of the UE obtained based on the position assistance information. In this manner, the UE is enabled to obtain a valid position estimate which can be used to perform action(s) on NTN cell(s) without delay.

A cellular base station (BS) which determines an aperiodic sounding reference signal (SRS) triggering offset configuration specifying an offset between an aperiodic SRS trigger received by a user equipment (UE) and transmission of the SRS by the UE. The cellular base station may determine that the SRS triggering offset should be adjusted. In response, the cellular base station may transmit signaling to the UE specifying a new value for the aperiodic SRS triggering offset. The new SRS triggering offset value may be partly based on a minimum timing offset for the UE and may be contained in a medium access control (MAC) control element (CE) or in downlink control information (DCI). Additionally, the new triggering offset value may be applicable for a plurality of component carriers or bandwidth parts. The cellular base station may also determine a new triggering offset value due to conflicts regarding the AP-SRS transmission.

The present invention provides a cellular base station (BS) and a UE, where the BS transmits more flexible downlink control information (DCI) to the UE, and the UE is capable of receiving and processing the received DCI message. The DCI message can have a DCI format of 0_1 or 0_2, and can also include a UL-SCH set to 0, a CSI request field all of 0, and an SRS request field with a non-zero value. The DCI message can indicate to the UE that the UE should: 1) transmit an aperiodic SRS corresponding to the SRS request; and 2) the UE should not transmit on the PUSCH. The DCI can include an existing field specifying a time slot offset or beam information that can be used when transmitting the aperiodic SRS. For higher efficiency, the base station can also generate a DCI message with an SRS trigger, which targets multiple UEs or multiple UE groups in a group.

A communication control method according to one aspect is a communication control method used in a cellular communication system. The communication control method includes transmitting, at a mobile relay node configured to migrate from a source donor node to a target donor node, an F1 setup request message for requesting establishment of F1 connection to the target donor node in response to reception of a predetermined message from the source donor node. Here, the predetermined message is a message representing one of a new establishment request of F1 connection for the target donor node and a migration indication to the target donor node.

The invention relates to the technical field of wireless communication, and provides a high-energy-efficiency wireless transmission method of a cellular communication system based on an intelligent reflecting surface, which comprises the following steps: constructing a downlink transmission system of an intelligent reflecting surface assisted multi-user NOMA (Non-Orthogonal Multiple Access); constructing an energy efficiency optimization model; moving the fixed intelligent reflecting surface, solving the maximum system energy efficiency according to the signal to interference plus noise ratio constraint of the user and the maximum transmitting power constraint of the base station, and obtaining the optimal transmitting beam of the base station; the base station is fixed to transmit wave beams, the total power consumption of the system is a fixed value, the maximum system sum rate is solved according to the signal to interference plus noise ratio constraint, the intelligent reflector shift constraint and the SIC decoding sequence constraint of the user, and the optimal intelligent reflector shift is obtained; and alternately solving the optimal base station transmitting beam and the optimal intelligent reflecting surface shift to obtain the maximum energy efficiency of the system. According to the method, an original non-convex optimization problem is converted into a convex optimization problem, the solving complexity is reduced, the increasing user requirements are met, and better communication experience is provided.

An access point device and a cellular communications system can support one or more location identifier features such that the cellular communications system can provide the access point device with one or more location parameters. The location parameters are indicative of a location of the access point device. The access point device can use the one or more location parameters to determine a location of the access point device. By knowing a location of the access point device, the access point device can determine a location for each client device connected to the access point device. In this way, a more accurate location can be determined by the access point device such that the location of any one or more client devices connected to the access point device can be provided so as to, for example, conserve resources and improve quality of service.

A cellular base station (BS) which transmits more flexible downlink control information (DCI) to the UE, and a UE capable of receiving and processing a received DCI message. The DCI message may have a DCI format of 0_1 or 0_2 and further may comprise an UL-SCH set to 0, a CSI request field of all 0s and an SRS request field having a nonzero value. The DCI message may indicate to the UE that the UE should: 1) transmit an aperiodic SRS corresponding to SRS request; and 2) that the UE should not transmit on the PUSCH. The DCI may include existing fields that specify either a slot offset or beam information useable when transmitting the aperiodic SRS. The base station may also generate a DCI message with an SRS trigger that is targeted to a plurality of UEs in a group, or a plurality of groups of UEs, for greater efficiency.

In an aspect, a network device may transmit one or more first sets of first chirp signals in a first bandwidth assigned to an allocated frequency range of the network device for data communication and sensing signals. The network device may transmit one or more second sets of second chirp signals in a second bandwidth of the allocated frequency range, wherein the second bandwidth is greater than the first bandwidth.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Apparatuses and methods for a sounding reference signal design and signaling in cellular communication systems. A method of a UE in a wireless communication system includes: receiving, from a base station (BS), a radio resource control (RRC) signal including first RRC parameters; identifying, based on the first RRC parameters, an aggregation flag indicating whether to enable sounding reference signal (SRS) slot aggregation; receiving the RRC signal including second RRC parameters indicating an SRS hopping pattern based on a determination that the SRS slot aggregation is enabled; performing, based on the SRS hopping pattern, the SRS slot aggregation to generate a super slot; and transmitting, to the BS, an SRS based on the super slot.

A wireless terminal of a cellular telecommunication system communicates with an access node via a cell and comprises receiver circuitry and processor circuitry. The receiver circuitry is configured to receive, from the cell, serving cell mobility information. The processor circuitry configured to determine, based on the serving cell mobility information, mobility state of the cell.

This communication device of a cellular communication system transmits, to another communication device, a Radio Link Control (RLC) Protocol Data Unit (PDU) which includes a Packet Data Convergence Protocol (PDCP) Service Data Unit (SDU). After the RLC PDU is transmitted, the communication device performs control so as to use a first setting value for increasing the transmission frequency of a STATUS PDU on the basis of the fact that the remaining time of a PDCP discard Timer activated for the PDCP SDU included in the RLC PDU falls below a prescribed threshold, and so as to use a second setting value at which the transmission frequency of the STATUS PDU becomes lower than the first setting value on the basis of the fact that the remaining time exceeds the prescribed threshold.