This application provides a communication method and apparatus. The method includes: A terminal device receives first indication information, where the first indication information includes a common timing advance of at least one candidate cell, and the first indication information is used to inform the terminal device that the at least one candidate cell is in a handover allowed state; and the terminal device sends a random access preamble to a target candidate cell based on a first timing advance, where the target candidate cell is one of the at least one candidate cell, and the first timing advance is a common timing advance of the target candidate cell. According to the method provided in this application, the UE can send the preamble more accurately in a handover scenario.

A radio communication link is established between first and second nodes in a cellular network, which comprise at least channel coding and decoding of first and second Physical Layer (PHY) and first and second Medium Access Control (MAC) sublayers.

User data is transmitted from the first node to the second node while applying a PHY Forward Error Correction (FEC) algorithm in transmission for coding and in reception for decoding by the first and second PHY layers.

It is computed a value of a PHY-FEC error metric with respect to errors in the user data received by the second node that are uncorrected by the PHY FEC algorithm.

The received user data including the uncorrected errors is transferred from the second PHY layer to the second MAC sublayer, subject to the value of the PHY-FEC error metric being less than a threshold used by an error tolerance procedure.

A method is provided for transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) information in a wireless communication system. A User Equipment (UE) configures a Physical Uplink Control Channel (PUCCH) format 3 for transmission of the ACK/NACK information. The UE transmits the ACK/NACK information for downlink transmission in a downlink subframe set including M downlink subframes in one uplink subframe, wherein M>1. A plurality of serving cells are configured for the UE and include one Primary Cell (PCell) and at least one Secondary Cell (SCell). The UE transmits the ACK/NACK information using a PUCCH format 1b when a first condition is met that comprises a condition in case where the ACK/NACK information corresponds to one Physical Downlink Shared Channel (PDSCH) without a corresponding Physical Downlink Control Channel (PDCCH) received only on the PCell in the downlink subframe set and the ACK/NACK information corresponds to an additional PDSCH indicated by detection of one corresponding PDCCH.

Embodiments herein relate, e.g., to a method performed by a wireless device for handling communication in a wireless communication network. The wireless device transmits to a radio network node, a first preamble associated with a selected downlink beam. The wireless device further monitors for a random access response, RAR, in a first RAR reception window and when the RAR is not received in the first RAR reception window, monitors for the RAR in a second RAR reception window of a different beam or to transmit, to the radio network node, a second preamble associated with a second beam wherein the first preamble is associated with a channel state information reference signal and the second preamble is associated with a synchronization signal block.

A method for controlling a data transmission rate, performed by a session management function (SMF), and includes: according to the maximum data rate for a terminal using a network slice, determining the session aggregate maximum bit rate (session-AMBR) of a packet data unit (PDU) session for the terminal to perform data transmission using the network slice, wherein the session-AMBR of the PDU session is less than or equal to the session-AMBR of a PDU session subscribed to by the terminal.

A device and a method for detecting abnormality in cell coverage in a wireless communication system are provided. A base station includes a communication interface, a memory, and a processor operatively coupled to the communication interface and the memory. The processor is configured to obtain information related to an abnormal area from a network management device. The processor is configured to identify, in a case in which a user equipment (UE) handovers from another base station to the base station, whether the abnormal area is provided by the other base station based on the information related to the abnormal area. The processor is configured to detect, in a case in which the abnormal area is provided by the other base station, whether cell coverage of the base station is affected by the abnormal area provided by the other base station, based on information related to timing advance (TA) of the other base station.

A device may receive geolocation data associated with a user device in a first cell region, and may determine a location of the user device. The device may determine whether the user device is located in an overlapping region or a non-overlapping region between the first cell region and a second cell region, and may calculate a velocity of the user device. The device may estimate a trajectory of the user device, and may calculate a first distance associated with the user device entering the overlapping region. The device may calculate a second distance associated with the user device exiting the overlapping region, and may determine a first time period to travel the first distance. The device may determine a second time period to travel the second distance, and may determine a handover time period based on the first time period and the second time period.

A system configured to track network slicing operations within a 5G communication network includes processing circuitry configured to determine a network slice instance (NSI) associated with a QoS flow of a UE. The NSI communicates data for a network function virtualization (NFV) instance of a Multi-Access Edge Computing (MEC) system within the 5G communication network. Latency information for a plurality of communication links used by the NSI is retrieved. The plurality of communication links includes a first set of non-MEC communication links associated with a radio access network (RAN) of the 5G communication network and a second set of MEC communication links associated with the MEC system. A slice configuration policy is generated based on the retrieved latency information and slice-specific attributes of the NSI. Network resources of the 5G communication network used by the NSI are reconfigured based on the generated slice configuration policy.

A terminal in a wireless communication system is provided. The terminal includes a transceiver, and at least one processor configured to receive, from BS, a RRC reconfiguration message including a reconfiguration with synchronization, transmit, to the BS, a first message including a PRACH, a PUSCH, and a C-RNTI MAC CE based on the reconfiguration with synchronization, control the transceiver to receive, from the BS, a first PDCCH and a PDSCH, wherein: for the case when the BS receives the PRACH and does not receive the PUSCH, the first PDCCH is a PDCCH addressed to RA-RNTI and the PDSCH includes a fallback RAR; and for the case when the BS receives the PUSCH, the first PDCCH is a PDCCH addressed to a C-RNTI corresponding to the C-RNTI MAC CE and the PDSCH includes an absolute timing advance command MAC CE, determine that a RAR reception is successful based on the at least one of the fallback RAR or the PDSCH, when a DRX is configured for the terminal via a RRC signalling, determine that active time for the DRX includes a time while a second PDCCH indicating new transmission addressed to a C-RNTI corresponding to the C-RNTI MAC CE has not been received after determining that the RAR reception is successful, and monitor the second PDCCH during the active time.

A system described herein may provide a technique for the seamless transfer of services provided by a first Multi-Access/Mobile Edge Computing device (“MEC”) to a User Equipment (“UE”), to a second MEC. Context information associated with a given application for which services are provided by the first MEC may be cached by the UE based on a determination that the second MEC should provide the services, and the UE may provide the cached information to the second MEC in order to seamlessly continue receiving services. The providing of the cached information to the UE and/or to the second MEC may be performed with an elevated priority level, in order to facilitate the seamless providing of the services relating to the application, thus resulting in minimal to no interruption of the user experience associated with the application.