Abstract: The present invention provides a channel detection method applied when an LTE system works in an unlicensed frequency band, a terminal and a base station. The channel detection method applied when an LTE system works in an unlicensed frequency band comprises determining a current sub-frame when a data traffic arrives, and setting a channel detection time in the current sub-frame and/or in a next adjacent sub-frame to perform channel state detection; and performing data traffic transmission when it is detected that the channel is in an idle state.

Abstract: Methods, corresponding apparatuses, and non-transitory computer readable mediums for a Proximity-based Service are provided. A method comprises receiving, from at least one user equipment, a resource utilization indication that indicates resources used by at least one user equipment for a ProSe device-to-device discovery procedure. The method also comprises determining, based on the received resource utilization indication, resources for the at least one user equipment to perform a subsequent ProSe device-to-device discovery procedure. The method additionally comprises signaling the determined resource to the at least one user equipment. With the claimed inventions, utilization efficiency of the radio resources may be improved and the complexity and overhead in allocating the resource for ProSe D2D discovery procedure may be lowered.

Abstract: A fast-accessing method may comprise: establishing a first security connection between a first network node and a user equipment; obtaining first information from a second network node, wherein the first information comprises at least one of system information of the second network node and an identifier of a security algorithm selected by the second network node for the user equipment; providing second information to the second network node, in response to an indication of the second network node from the user equipment, wherein the second information comprises security information related to the user equipment; and sending the first information to the user equipment for establishing a second security connection between the user equipment and the second network node.

Abstract: Disclosed are methods and apparatus for controlling state transition of a user equipment UE in proximity wireless communication. A method can comprise: learning about an associated agent's context of a connected UE and said UE's capability; deciding to put the connected UE into virtual associated state; sending to said UE a message with indication of putting said UE into said virtual associated state as well as the UE's context; and maintaining said associated agent's context of the UE.

Abstract: A fast-accessing method may comprise: establishing a first security connection between a first network node and a user equipment; obtaining first information from a second network node, wherein the first information comprises at least one of system information of the second network node and an identifier of a security algorithm selected by the second network node for the user equipment; providing second information to the second network node, in response to an indication of the second network node from the user equipment, wherein the second information comprises security information related to the user equipment; and sending the first information to the user equipment for establishing a second security connection between the user equipment and the second network node.

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: In accordance with an example embodiment of the present invention, there is provided an apparatus, comprising at least one processing core configured to determine an opportunity for device-to-device, D2D, communication, and at least one transmitter configured to cause transmitting of a D2D communication request, wherein the D2D communication request at least one of comprises a radio resource control signaling message and comprises an indication of a type of D2D communication that is requested. The indicated type may comprise D2D communication with no fallback to cellular connectivity, wherein such a D2D communication can be established without involving a core network, CN.

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 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: In accordance with an example embodiment of the present invention, a method comprises configuring an autonomous mode for traffic offloading; and indicating the autonomous mode towards at least one terminal, wherein said autonomous mode supports local area radio access connectivity by internet protocols to reduce control from a core network. Related apparatus and computer program product are also described.

Abstract: A method includes coordinating one or more pools of resources for discovery signal transmission between a plurality of devices, at least one of said pools of resources being shared by at least one larger cell and at least one smaller cell at least partially in a coverage area of the said larger cell.

Abstract: Various communication systems may benefit from inter-operator device-to-device operation. For example, communication systems of the third generation partnership project (3GPP) long term evolution (LTE) advanced (LTE-A) release12/13 (Rel-12/13) or future releases may use such operation with respect to D2D communications. A method can include preparing, at a network element operated by an operator, radio resource information related to one or more operators other than the operator. The method can also include broadcasting, by the network element, the radio resource information. The radio resource information can be configured to permit a user equipment served by the network element to perform device-to-device discovery and/or communication with another user equipment served by at least one of the one or more operators.

Abstract: First and second level discovery messages for device-to-device discovery are determined to be going to be transmitted, resource(s) are requested for transmission of at least the second level discovery message, and allocated resource(s) of a second type are received. The first level discovery message is transmitted on either a selected resource of the first type or a selected one of the allocated resource(s). The second level discovery message is transmitted on a selected one of the more allocated resource(s) of the second type, A first level discovery message is received on a resource of either a first type or a second type. It is determined whether the received message is of interest or not and if the message is of interest, then it is determined whether a second level discovery message is available and if so, the second level discovery message is received on a resource of the second type.

Abstract: Various communication systems may benefit from techniques and systems for resource allocation. For example, communication systems of the third generation partnership project may benefit from device to device discovery resource allocation methods and systems. A method can include determining that downlink data transmission may cause conflict between uplink control channel transmission and device to device discovery signal transmissions or that uplink shared channel transmissions may conflict with device to device discovery signal transmissions; and requesting a user equipment to report device to device discovery needs based on the determining.

Abstract: Disclosed are methods and apparatus for a switch from a first communication path between a first device and a second device to a second communication path to be established between the first device and the second device. A method can comprise: in response to the initiation of the switch, sending a notification of the initiation of the switch to a base station for setting up an intermediate communication path between the first device and the second device, wherein the intermediate communication path is relayed by the base station and does not pass a core network; and delivering traffics between the first device and the second device via the intermediate communication path until the second communication path is established.

Abstract: The invention is related to an apparatus, comprising: at least one processor and at least one memory including computer code for one or more programs, the at least one memory and the computer code configured, with the at least one processor, to cause the apparatus at least to: receive a signal from a first user device, the signal being transmitted using at least one resource of one group of a plurality of resource groups, the one of the plurality of resource groups being associated with a first range class; and determine the first range class based on the one of the plurality of resource groups.

Abstract: Methods, corresponding apparatuses, and non-transitory computer readable mediums for a Proximity-based Service are provided. A method comprises receiving, from at least one user equipment, a resource utilization indication that indicates resources used by at least one user equipment for a ProSe device-to-device discovery procedure. The method also comprises determining, based on the received resource utilization indication, resources for the at least one user equipment to perform a subsequent ProSe device-to-device discovery procedure. The method additionally comprises signaling the determined resource to the at least one user equipment. With the claimed inventions, utilization efficiency of the radio resources may be improved and the complexity and overhead in allocating the resource for ProSe D2D discovery procedure may be lowered.

Abstract: Embodiments of the disclosure provide methods and apparatuses for handover in a heterogeneous network. According to the method, a candidate radio connectivity mode for use after handover from a source BS to a first target BS and/or a second target BS is determined; a first handover related message which comprises the candidate radio connectivity mode is sent to the source BS; and in response to receiving a second handover related message, the first target BS and/or the second target BS may be accessed, wherein the source BS is not associated with the first target BS, and wherein the first target BS is a LPN and is associated with the second target BS.

Abstract: Systems and techniques for synchronization between in-coverage and out-of coverage user devices. A base station configures in-coverage and out-of coverage synchronization signals and configures user devices to recognize synchronization signals as in-coverage or out-of-coverage. An in-coverage device furnishes an in-coverage synchronization signal upon detection of an out-of coverage signal, and may continue to furnish the signal upon continued detection of an out-of-coverage signal that is not synchronized to the network. An out-of-coverage device may receive and synchronize to an in-coverage signal if available, or an out-of-coverage signal if available, or may generate and transmit its own out-of-coverage signal if no in-coverage or out-of-coverage signal is available.

Abstract: Systems, methods, apparatuses, and computer program products for D2D synchronization in, for example, partial coverage scenarios are provided. One method includes sending, by a network node, information to at least one user equipment in a network. The information may be used by the at least one user equipment to determine whether the at least one user equipment is a full-coverage idle mode user equipment or a downlink-only idle mode user equipment. When, for instance at least one of a pair of device-to-device (D2D) user equipment is outside of the network coverage area, the method includes indicating via a cellular broadcasting message to the downlink-only idle mode and the full-coverage idle mode user equipment to send at least one synchronization signal. The method may then include configuring a RRC_Connected mode user equipment at cell-edge to monitor whether there are user equipment sending synchronization signals.