Abstract: A method for operating a first distributed unit (DU) includes participating in a link layer context transfer with a second DU, establishing a user data path for a mobile device, the user data path connecting the mobile device with a centralized unit (CU) including a radio control protocol entity communicating with the mobile device, and storing first user data for the mobile device received from the CU and second user data for the mobile device received from the second DU. The method includes establishing a connection with the mobile device, sending the first user data and the second user data to the mobile device, and adapting the link layer context to operate in the first DU for exchanging data between the CU and the mobile device, wherein adapting the link layer context includes associating an uppermost protocol layer of the first DU with a lowest protocol layer of the CU.

Abstract: A user equipment includes: a transmitter configured to transmit uplink signals; and a processor circuit coupled with the transmitter, the processor circuit configured to: drop a Sounding Reference Signal (SRS) transmission when a total transmission power exceeds maximum output power of the user equipment and the user equipment needs to transmit a Physical Random Access Channel (PRACH) signal in a secondary serving cell in parallel with the SRS transmission in a symbol on a subframe of a different serving cell; and adjust transmission power of a Physical Uplink Shared Channel (PUSCH) signal until an adjusted total transmission power is less than or equal to the maximum output power of the user equipment when the user equipment needs to transmit a PRACH signal in a secondary serving cell in parallel with a PUSCH signal in a different serving cell within a symbol.

Abstract: A method and system for group handover is provided. In an embodiment, a method in a network component for group handover in a wireless network includes receiving, at the network component, a mobility command from a target base station. The method also includes processing, with the network component, the mobility command in a packet data convergence protocol (PDCP) layer of a context for a remote user equipment (UE) to generate a PDCP Protocol Data Unit (PDU). The method also includes encapsulating the PDCP PDU as a field in a radio resource control (RRC) message to the relay UE.

Abstract: Embodiments of this disclosure provide an information transmission method and apparatus and a system. The method is applicable to a terminal and includes: whether the terminal is in a congestion state is determined; and corresponding information is transmitted by using a parameter related to the congestion state when the terminal is in a congestion state. With the embodiments of this disclosure, the parameter related to the congestion state is configured for the terminal, thereby reducing resource collision, improving resource utilization efficiency and improving reliability of communications.

Abstract: Embodiments of this disclosure provide an information transmission method and apparatus and a system. The method is applicable to a terminal, the terminal being configured with a first type of resource pool for transmitting first type of information and a second type of resource pool for transmitting second type of information; wherein, the method includes: when the terminal is triggered to transmit information, it selects resources for transmitting the information from the configured first type of resource pool or second type of resource pool according to an attribute of the information; and transmits the information by using the selected resources. With the embodiments of this disclosure, it may be ensured that the terminal will not miss detecting a type of information due to a semi-duplexing problem, such as detecting resources for transmitting emergency information, thereby increasing utilization of resources, and improving reliability of V2V communications.

Abstract: A network message notification apparatus and method and a communication system. The method includes: receiving a network message transmitted by a network device; the network message including indication information indicating a user identity range; parsing the indication information and determining whether a user identity of the UE falls within the user identity range indicated by the indication information; and determining whether the UE is notified by the network message according to a determination result. Hence, a magnitude of a network message in the communication system may be greatly reduced, and more UEs may be notified by using relatively few resources.

Abstract: A user equipment includes: a transmitter configured to transmit uplink signals; and a processor circuit coupled with the transmitter, the processor circuit configured to: drop a Sounding Reference Signal (SRS) transmission when a total transmission power exceeds maximum output power of the user equipment and the user equipment needs to transmit a Physical Random Access Channel (PRACH) signal in a secondary serving cell in parallel with the SRS transmission in a symbol on a subframe of a different serving cell; and adjust transmission power of a Physical Uplink Shared Channel (PUSCH) signal until an adjusted total transmission power is less than or equal to the maximum output power of the user equipment when the user equipment needs to transmit a PRACH signal in a secondary serving cell in parallel with a PUSCH signal in a different serving cell within a symbol.

Abstract: A method for dynamically relaying data includes receiving an advertisement for dynamic relaying services from a relay device, establishing a first device-to-device (D2D) connection with the relay device in accordance with the advertisement, transmitting a data packet to the relay device using the first D2D connection, and releasing the first D2D connection automatically after transmitting the data packet.

Abstract: A method and system for group handover is provided. In an embodiment, a method in a network component for group handover in a wireless network includes receiving, at the network component, a mobility command from a target base station. The method also includes processing, with the network component, the mobility command in a packet data convergence protocol (PDCP) layer of a context for a remote user equipment (UE) to generate a PDCP Protocol Data Unit (PDU). The method also includes encapsulating the PDCP PDU as a field in a radio resource control (RRC) message to the relay UE.

Abstract: An apparatus and method for paging a UE and a communications system. The method includes: calculating a first-grade paging group index based on an inherent identity of the UE, or based on an inherent identity of the UE and a network configuration parameter; calculating a second-grade paging group index based on a network identity allocated by an MME; receiving indication information for indicating paging group indices transmitted by a base station; determining whether the information contained in the indication information is consistent with the first-grade paging group index and the second-grade paging group index; and decoding a downlink data channel to determine whether the UE is paged when it is consistent. Hence, different paging groups may have identical or approximate numbers of UEs, which may reduce a probability of “false paging” of the overall cell.

Abstract: An updating apparatus and method for an access control parameter and a communication system. The updating method includes: determining by a UE access class barring information for performing access control and update period information for updating the access class barring information; and updating the access class barring information by the UE based on the update period information. The UE itself improves fairness of the access, and the network side updates the access control parameter only when the network payload is modified, which may lower power consumption of the UE in access, avoid frequent occurrence of paging and reduce use of broadcast resources of the system.

Abstract: A method and apparatus for analyzing cause of link failure, includes: receiving, by a base station where the user equipment is present when a link failure is observed by the user equipment, identification information transmitted by other base stations or the user equipment, the identification information including: identification associated with the user equipment and/or identification of the user equipment in the base station; and determining, by the base station when it determines that the identification information is stored in the base station, that the link failure is resulted from a handover preparation failure.

Abstract: A method and apparatus for analyzing cause of link failure, includes: receiving, by a base station where the user equipment is present when a link failure is observed by the user equipment, identification information transmitted by other base stations or the user equipment, the identification information including: identification associated with the user equipment and/or identification of the user equipment in the base station; and determining, by the base station when it determines that the identification information is stored in the base station, that the link failure is resulted from a handover preparation failure.

Abstract: An uplink data transmission method and apparatus for latency reduction and a communications system. The uplink data transmission method includes: receiving resource indication information transmitted by a base station; the resource indication information indicating availability of using the semi-persistent resources at one or more TTIs or subframes by the first UE; determining a transmission resource from the semi-persistent resources according to the resource indication information when uplink data is needed to be transmitted; and transmitting the uplink data by using the transmission resource. Hence, not only latency of the uplink data may be reduced outstandingly, but also the semi-persistent resources may be allocated to other UEs with no waste of semi-persistent resources as much as possible, thereby improving resource utilization efficiency and transmission latency performance of the UE.

Abstract: This application provides a method and an apparatus for configuring transmission time interval, a data transmission method and apparatus and a system. The method for configuring transmission time interval includes: an eNB transmits to a user equipment configuration information about data radio bearers (DRBs), the configuration information about DRBs indicating TTI length to which each DRB configured by the eNB for the UE is applicable. With the embodiments, multiplexing packets of traffics applicable to different TTI lengths by the user equipment to the same transport block for transmission may be avoided, and occurrence of being unable to fully use resources may also be avoided.

Abstract: The embodiments of the present disclosure provide a method, an apparatus and a system for acquiring system information. The method for acquiring includes setting at least two indicators for indicating a system information update, the at least two indicators being corresponding to at least two User Equipments (UEs); and sending the indicators to the UEs, so that the UEs acquire system information according to their respective modification periods. Through the embodiments of the present disclosure, for example the MTC UE can acquire the latest system information in time, while ensuring that any extra and unnecessary acquisition of system information is not performed to reduce the power consumption of the MTC UE.

Abstract: A processing apparatus and method for network indication and a communications system in a procedure of RC-IWK. The processing method includes: a base station determines whether UE context release indication contains information on a cause of release indicating that a traffic of a UE is steered from the LTE to the WLAN, when the UE context release indication transmitted by an MME; and initiates a connection reconfiguration procedure to the UE so that the UE is kept in a connected state, in a case where the UE context release indication contains the information on the cause of release indicating that the traffic of the UE is steered from the LTE to the WLAN. Hence, a case, for example, where the UE not expecting to use the LTE is steered to the LTE system again, will not occur.

Abstract: A sidelink information transmission device and method and a communication system. The method includes: selecting a relay user equipment by a remote user equipment from one or more user equipments; and transmitting to a base station first resource request information used for requesting for allocating a sidelink resource; the first resource request information indicates that the remote user equipment and the relay user equipment have been paired. Hence, resource waste due to allocating a sidelink resource for remote user equipment but allocating no sidelink resource for paired relay user equipment may be avoided or reduced, or resource collision due to allocating overlapped sidelink resources for remote user equipment and paired relay user equipment may be avoided or reduced.

Abstract: A method for operating a user equipment (UE) includes detecting an occurrence of an overheating condition in the UE, and based thereon, determining a first set of operating capabilities of the UE from a second set of operating capabilities of the UE, where the first and second set of operating capabilities are associated with a connection between the UE and a network entity, and where the first set of operating capabilities is a reduction in operating capability of the UE when compared to the second set of operating capabilities, triggering a transfer of UE capability information associated with the first set of operating capabilities, and applying, by the UE, the first set of operating capabilities to the connection.

Abstract: Graphene oxide quantum dots (GOQDs) a composite nanomaterial formed by the GOQDs with graphene and/or graphene-like structure(s), and methods for preparing them are provided. The method for preparing GOQDs comprises providing a carbon-based 3D bulk material having a graphite layer structure as an anode, positioning an end face of the material in contact and parallel with the liquid surface of an electrolyte solution, and intermittently or continuously cutting and exfoliating graphite layers at the end face by electrochemical oxidation to obtain GOQDs.