The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure 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. The disclosure provides a method and device for switching a serving cell.

An embodiment of the present disclosure may provide an inter-MeNB handover method in a small cell system, including: making, by a source MeNB and/or target MeNB, a determination as to whether to maintain a SeNB when handover is performed; and triggering different handover processes according to a result of the determination as to whether to maintain the SeNB. Another embodiment of the present disclosure may further provide an inter-MeNB handover device in a small cell system. With the inter-MeNB handover method and device in a small cell system provided by the present disclosure, unnecessary deletion and re-establishment of the bearers at the SeNB for the UE may be reduced. False bearer deletion may be avoided and data forwarding may be reduced. Furthermore, the SeNB may be maintained according to network deployment and SGW re-selection may be supported. Therefore, system capacity and transmission speed of the data may be improved.

Certain aspects of the present disclosure provide techniques for staggering clients based on wireless network information. An example method generally includes obtaining, by a client from a modem, information associated with a wireless communication network. The method also includes transmitting, from the client to the server, at an application level, a first message including the information. The method further includes receiving, by the client from the server, data at a time determined based on the information.

Some approaches are provided for a user equipment (UE) to acquire the accurate reference timing of a target cell during the handover procedure. The scheme ensures that UE meets the synchronization accuracy requirement during the process of handover and the continuity of time sensitive services is guaranteed.

The disclosure relates to a method and apparatus for reporting a radio link failure (RLF) in a mobile communication system. According to an embodiment of the disclosure, a method, performed by a user equipment, of reporting an RLF includes detecting a first RLF during use of a first radio access technology (RAT), accessing a base station by using a second RAT different from the first RAT, and transmitting a report on the first RLF to the base station by using the second RAT.

The present application discloses a method and a device used in a communication node for wireless communications. The communication node receives a first signaling, the first signaling being used for indicating at least a first target cell and a second target cell; and performs a first handshake process for the first target cell; and performs a second handshake process for the second target cell; and determines whether to initiate an RRC connection re-establishment procedure according to whether at least one of the first handshake process or the second handshake process is successfully completed; neither the first handshake process nor the second handshake process being successfully completed is used to determine to initiate the RRC connection re-establishment procedure; either the first handshake process or the second handshake process being successfully completed is used to determine not to initiate the RRC connection re-establishment procedure.

A electronic device includes a memory, a communication circuit that supports plural frequency bands for wireless local area network (WLAN) communication, and a processor operably connected to the memory and the communication circuit. The processor establishes WLAN communication with an access point (AP) over a first frequency band among the frequency bands, compares, based on a signal of a second frequency band different from the first frequency band being detected, the first frequency band with the second frequency band, determines, based on the second frequency band being higher than the first frequency band, a change in a strength of a signal received over the first frequency band, estimates, when the change indicates an increase in the strength, a link quality for the AP over the second frequency band, and switches the first frequency band for WLAN communication with the AP to the second frequency band based on the link quality.

In an access device associated with a first network cell, a method for enabling user equipment (UE) to obtain a service unavailable through the first network cell includes receiving a request for the UE to access the service, and identifying, in a message to the UE, a plurality of second network cells providing the service.

This application provides a group handover method. The method includes: A first terminal device receives first information from a first network device, where the first information indicates a first resource, the first resource is for carrying fourth information, the fourth information is cell handover information of a plurality of terminal devices, and the first terminal device is one of the plurality of terminal devices; and the first terminal device receives the fourth information on the first resource. This can reduce signaling overheads caused by cell handover of a plurality of users and improve resource utilization.

Supplementary uplink (SUL) may be used in wireless systems. Cell suitability criteria may be provided for cells configured with SUL. A Wireless Transmit/Receive Unit (WTRU) may receive paging with an indication of a carrier (e.g., SUL or regular uplink (RUL)) in which to initiate part or all of an initial access. A WTRU that may be performing response-driven paging may provide (e.g. explicit) beam information for beamforming of a paging message on a non-beamformed SUL. A handover (HO) procedure (e.g., carrier selection, configuration handling, HO failure, etc.) may be provided for a WTRU with a configured SUL. A WTRU may request a change of a configured UL. A WTRU may (e.g., autonomously) perform a switch to a different (e.g., configured) uplink, for example, when one or more conditions may be met (e.g., conditional switch). Semi-persistent scheduling (SPS) resources/configuration may be relocated from a first UL to a second UL.