Abstract: A method for maintaining time and frequency synchronization when a micro-cell base station is in an off state, a system for maintaining time and frequency synchronization when a micro-cell base station is in an off state, and a terminal are provided. The method includes: detecting a signal sent by a macro-cell base station or the micro-cell base station in a subframe at a predefined position when the micro-cell base station is in an off state; and performing an operation for maintaining time and frequency synchronization with the micro-cell base station based on the signal sent in the subframe at the predefined position.

Abstract: Provided are a data transmission method and system for when an LTE system operates using a time division duplexing mode in an unlicensed frequency band, and a device having a base station function. The data transmission method comprises: a channel monitoring sub-frame used for periodically detecting a downlink channel state is arranged in a frame structure of a time division duplexing mode; within any period, if the channel monitoring sub-frame detects that a downlink channel is in idle state, downlink data is sent via a downlink sub-frame located within the period in the frame structure, and if not, downlink data is not sent within the period.

Abstract: A data transmission method, an electronic device and a device having a base station function, wherein, a channel sensing sub-frame is arranged in a frame structure used only for downlink transmission frequency division duplexing; within any period, downlink data is sent via a downlink sub-frame in the frame structure when the channel sensing sub-frame senses that the downlink channel is in an idle state, or otherwise downlink data is not sent. Therefore, on the premise that normal operation of the LTE system by means of the supplemental downlink mode in the unlicensed frequency band can be ensured, the LTE system is prevented from generating significant interference with regard to other systems when operating in the unlicensed frequency band.

Abstract: An MIC verification method in D2D communications and a D2D communications system include: a monitoring UE receives a discovery announcement message from an announcing UE, in which the discovery announcement message carries a 32-bit MIC, and the MIC is a signature value obtained when the announcing UE conducts, by using a private key, a digital signature on a current time and a time window in the discovery announcement message; and the monitoring UE verifies the correctness of the MIC by using a public key of the announcing UE to determine whether the discovery process is successful.

Abstract: The present disclosure provides a resource allocation method and system used for direct terminal-to-terminal communication, a device having base station functionality, and a terminal. The resource allocation method includes: obtaining time-frequency resource usage of the device having the base station functionality and/or state information of each D2D terminal within a coverage area of the device having the base station functionality; determining an allocation mode of allocating time-frequency resource to the each D2D terminal, according to the time-frequency resource usage of the device having the base station functionality and/or the state information of the each D2D terminal; and allocating time-frequency resource used for the direct terminal-to-terminal communication to the each D2D terminal according to the allocation mode, so as to enable the each D2D terminal to use the allocated time-frequency resource to perform the direct terminal-to-terminal communication.

Abstract: A method for acquiring user configuration information is provided. The method includes the following. A configuration file is stored as a server configuration file of a current service card in response to receiving the configuration file from a communications server, or configuration information is stored as a user configuration file of the current service card in response to the configuration information being set based on the configuration file, where at least one of the server configuration file of the current service card and the user configuration file of the current service card exists. When the current service card of a terminal is replaced with a replacement service card, prestored user configuration files is searched to find a user configuration file corresponding to the replacement service card, and user configuration information is acquired to perform a communications service according to the user configuration file corresponding to the replacement service card.

Abstract: In one aspect of the disclosure, a channel detection method applied when an LTE system works in an unlicensed frequency band comprises determining a current sub-frame and a channel detection time when a data traffic arrives, wherein the channel detection time is set in at least one of the current sub-frame and a next adjacent sub-frame to perform channel state detection, and judging whether the terminal or base station that performs the channel state detection and other terminals or base stations belong to a same telecommunication operator in order to perform the channel state detection in a corresponding way; and performing data traffic transmission when it is detected that the channel is in an idle state. Other aspects of the disclosure relates to a terminal and a base station using the channel detection method.

Abstract: The present disclosure provides a terminal that comprises: a call setup unit, for carrying out a voice call setup procedure on the first communication network if a call request is received when data service is being carried out by using the first communication network; an interaction unit, for receiving circuit resource information of the second communication network required for establishing voice service corresponding to the call request; a processing unit, for sending an answer response to a mobility management entity, disconnecting the data service of the first communication network according to the received voice fallback information, and establishing voice service of the second communication network by using the received circuit resource information, if it is detected that an answer button of the terminal is selected after the voice call setup procedure is completed.

Abstract: The present disclosure provides a data transmission method, including: upon receipt of a service request, it is determined whether said service request is a data sharing request; if the determined result is that said service request is a data sharing request, then the data source node and data-receiving destination node corresponding to said data sharing request are determined; according to the distance principle and/or signal quality principle and the credit principle and/or incentive principle, a bearer network node is selected corresponding to said data source node and said data-receiving destination node; according to said bearer network node, data source node, and data-receiving destination node, the data sharing network structure is determined. The technical solution of the present disclosure resolves the trust and incentive problem in terminal direct-connection communication networks, increasing security in the sharing of data.

Abstract: A method of configuring a channel detection sub-frame for a terminal and a device with a base station function that includes setting, in a frame structure in a time division duplex mode, a downlink channel detection sub-frame used for periodically detecting whether a downlink channel of an unlicensed frequency band is idle and sending an uplink channel detection sub-frame configuration command to a terminal according to a configuration mode of the downlink channel detection sub-frame. According to the uplink channel detection sub-frame configuration command, an uplink channel detection sub-frame is set for periodically detecting whether an uplink channel of the unlicensed frequency band is idle. The uplink channel detection sub-frame is located in the same sub-frame as a downlink channel detection sub-frame.

Abstract: The present disclosure provides a method and a terminal. The method includes the follows. When a communications server delivers a configuration file, or when a user performs setting based on the configuration file delivered by the communications server, the configuration file delivered by the communications server is stored as a server configuration file of a current service card, or configuration information set by the user based on the configuration file is stored as a user configuration file of the current service card. When the current service card of the terminal is replaced, the user configuration file of the current service card is searched to find a user configuration file corresponding to a replacement service card, and user configuration information is acquired according to the user configuration file corresponding to the replacement service card.

Abstract: A co-frequency full-duplex antenna structure includes a receiving antenna, a transmitting antenna for transmitting a signal of a predetermined wavelength, and a signal reflection apparatus for reflecting the signal transmitted by the transmitting antenna, so as to realize that a path difference between a reflected signal formed when the signal transmitted by the transmitting antenna reaches the receiving antenna after being reflected and a direct signal formed when the signal transmitted by the transmitting antenna directly reaches the receiving antenna is an odd number of times as much as one half of the predetermined wavelength.

Abstract: Provided is a channel detection notification method when a LTE system works at an unauthorized frequency band, a system and a base station. The channel detection notification method includes the follows. A primary cell base station receives RRM measuring results of multiple base stations at the unauthorized frequency band reported by a terminal; according to the RRM measuring results of the multiple base stations, a secondary cell base station is selected for the terminal; if it is determined that downlink traffic reaches a set first traffic threshold value, the secondary cell base station is informed to conduct downlink channel detection at the unauthorized frequency band; and if it is determined that uplink traffic reaches a set second traffic threshold value, the secondary cell base station and/or the terminal is informed to conduct uplink channel detection at the unauthorized frequency band.

Abstract: A method for adjusting transmission power of a small cell, a system for adjusting transmission power of a small cell, and a small cell include acquiring transmission power of other small cells when downlink data needs to be transmitted; and adjusting transmission power for transmitting the downlink data according to a load state of the small cell and the transmission power of the other small cells.

Abstract: An eNodeB-based communication method and communication system include dividing a plurality of eNodeBs into at least one eNodeB cluster; when a terminal is moving within any particular eNodeB cluster of the at least one eNodeB cluster, the terminal obtains identification information of the particular eNodeB cluster, and determines an eNodeB associated with the terminal from among the particular eNodeB cluster; and a specified eNodeB of the particular eNodeB cluster schedules the eNodeB associated with the terminal to provide communication services for the terminal.

Abstract: A radio resource management method, a radio resource management device, an equipment having base station functionality, a radio resource monitoring method, a radio resource monitoring device, and a terminal are provided. The method includes a first radio resource of the serving cell in which a terminal is located, and a second radio resource of any one of the neighboring cells in neighboring cells of the serving cell, are obtained; the first radio resource and the second radio resource are differentiated to obtain a target radio resource, and the target radio resource is transmitted to the terminal.

Abstract: A power control method and a power control device for terminal device-to-device communications, and a parameter transmission method includes: determining at least one terminal which is outside a base station coverage range and interferes with a base station; acquiring, by the base station, signal strength information about a measurement signal sent by each terminal of the at least one terminal when the measurement signal reaches the base station, and configuring a corresponding power control parameter for each terminal according to the signal strength information; and sending, by the base station, the corresponding power control parameter of each terminal to a synchronization source terminal within the base station coverage range corresponding to each terminal, so as to send the power control parameter to a corresponding terminal by the synchronization source terminal, so that each terminal conducts power control using the corresponding power control parameter.

Abstract: Provided are a resource allocation method and a resource allocation device, which are used for a frequency division duplexing system. The resource allocation method comprises: setting a shared frequency band; and according to resource demands for an original uplink frequency band and an original downlink frequency band in a network service, allocating the shared frequency band to the original uplink frequency band and/or the original downlink frequency band.