2217 results about "Device to device" patented technology

A method and an apparatus for performing synchronization by a first device in a Device-to-Device (D2D) network are provided. The method includes detecting a synchronization signal from at least one second device during one period, determining a phase adjustment value depending on a number of synchronization signals, which have been detected from the at least one second device during the one period, adjusting a phase value of a first device using the phase adjustment value, and transmitting a synchronization signal if the phase value of the first device reaches a predetermined specific value.

There is provided a method including obtaining, by a user terminal capable to perform direct device-to-device, D2D, communication with another user terminal, information indicating tracking area-specific resources for a D2D discovery process; and applying the obtained tracking area-specific resources in performing the D2D discovery process within the tracking area, wherein the D2D discovery process is for discovering D2D communication capable devices in the tracking area over an air interface of a cellular network.

An apparatus, system and method to dynamically manage an allocation of communication resources for direct device-to-device communications between a plurality of wireless communication devices in a wireless communication system. In one embodiment, the apparatus (410) includes a communication resource allocator (420) configured to: (1) select a master communication device of a plurality of wireless communication devices that form a device-to-device group, (2) provide an allocation of communication resources for device-to-device group that facilitate direct device-to-device communications therebetween. The apparatus (410) also includes a message generator (430) configured to assemble messages that include the allocation of the communication resources.

Disclosed is a method for establishing a device-to-device link connection and scheduling for device-to-device communication and terminal relaying. The method for operating a terminal according to the present invention comprises the following steps: receiving information on the establishment of a D2D link; reporting a state of a D2D buffer of the D2D link to a base station; and receiving information on the D2D link resource allocation based on the report on the D2D buffer state. The scheduling method for D2D communication according to the present invention enables dynamic scheduling to be performed on a subframe unit basis, and enables semi-continuous scheduling for continuous data transmission for a D2D communication link.

A device to device network allows an entity to seamlessly access content stored on various devices. Many devices can be registered on a network; however, an entity will only have access to devices for which the entity is authorized to access. In one embodiment, the entity can only access devices that have been authenticated with the same username. While using the device-to device network, an entity can transfer files, stream files, create and use play lists, send commands to various devices and explore the contents of various devices.

A method includes receiving, at a network node, a device-to-device D2D discovery request from a first device and sending a D2D discovery response from the network node to the first device. The D2D discovery response includes information associated with a second device that is available to establish a D2D connection with the first device. The network node may perform inquiries regarding D2D connection permission from both devices. If D2D connection is permitted by both devices, the network node may facilitate the D2D scanning by sending each device's scanning information to the other device via a non-D2D link. In parallel to D2D scanning, the network node may speed up D2D link setup by distributing, via non-D2D links, link setup information to each device, where the link setup information may include device credential(s), IP address allocation(s), and / or group owner assignment.

Methods, apparatuses, a system and computer program products are provided for autonomously reusing an unlicensed band in a hybrid cellular and device-to-device network. In accordance with an embodiment of the invention, an apparatus receives a request for resources from a terminal, and identifies available resources on an unlicensed band based on the request. The apparatus further reserves the identified available resources for use by the terminal, and transmits a reservation response to the terminal, wherein the reservation response comprises information relating to the reserved available resources. Further, the apparatus transmits data to the terminal over a licensed band and the available resources reserved on the unlicensed band.

A battery charging station is equipped with radio frequency power transmitters, induction power transmitters, and ultrasound power transmitters so as to concurrently charge electronic devices. The battery charging station is operable to network the electronic devices through wireless communication. In this regard, the battery charging station may coordinate or arrange the radio frequency power transmitters, the induction power transmitters and / or the ultrasound power transmitters so that the resulting power transmission from the battery charging station to one or more intended networked electronic devices may be maximized. The battery charging station may wirelessly communicate with the electronic devices for device networking. The networked electronic devices may be connected to a computer network for various network services such as, for example, network advertising and software downloading or uploading. Both direct and in-direct device-to-device communication may be supported among the networked electronic devices. The battery charging station maintains data communication during battery charging.

Various methods for managing device-to-device interference are provided. One example method includes receiving an expected interference level for a resource block, where the expected interference level is represented by data indicative of interference associated with the resource block due to device-to-device communications using the resource block. The example method further includes selecting the resource block for a device-to-device communications session based at least in part on the expected interference level for the resource block. Similar and related example methods and example apparatuses are also provided.

A sensing and context management architecture that can detect that a user is interacting with a given device and in an associated context, and in response thereto, manages device processes as the user moves from device to device, location to location, and / or context to context. The invention comprises a system that facilitates management of a user situation or context. A sensing component is provided that senses a context of a user by way of one or more sensors and / or a particular device with which the user is interacting in the context, for example, and a management component that manages the device and / or one or more services in the context according to rules or inferences user preferences, sensed observations, and user input data.

The embodiment of the invention discloses a method and a device for consulting resource in D2D (Device To Device) communication. The method comprises the steps that: a current device receives resource demand information sent by the other device in a current super frame, and the resource demand information comprises a service priority level of the other device, a beacon time slot of a beacon of the other device and / or the amount of resource applied by the other device; and the resource position which can be distributed for the current device can be calculated according to the service priority level of the other device, the beacon time slot of the beacon of the other device and / or the amount of the resource applied by the other device by the current device. By adopting the method or the device disclosed by the embodiment of the invention, the phenomenon that the same resource is competed by multiple devices is avoided, and the efficiency of consulting the resource between the devices is increased.

A method, apparatus, computer readable medium is provided to perform resource coordination among multiple cells to cancel near-far interference for device-to-device transmission, including cross-cell device-to-device transmission. In this context, a dedicated resource exchanging channel can be defined between cellular user equipment and device-to-device user equipment for interference control and resource coordination. A cellular user equipment can forward its uplink resource grant information over the dedicated resource exchanging channel when it determines potential interference. A device-to-device user equipment can monitor the dedicated resource exchanging channel in order to identify one or more resources that can potentially interfere with device-to-device transmission.

Disclosed is device-to-device communication based on a cellular communication network. A method of operating a terminal capable of supporting D2D (device to device) communication based on a cellular communication network may include: determining whether to perform central control D2D communication or distributed control D2D communication; and performing the distributed control D2D communication, or requesting a setting for the central control D2D communication to a base station on the basis of the determination. With the D2D communication based on the cellular communication network, the cellular communication, the central control D2D communication, or the distributed control D2D communication may flexibly and selectively operate in the cellular network.

Provided are a device-to-device (D2D) group communication method and a device using the same. The method includes transmitting a scheduling request for D2D group communication to a base station, receiving first radio resource information for a status report of D2D data to be transmitted from the base station, transmitting a D2D buffer status report to the base station through a first radio resource, receiving second radio resource information including D2D resource allocation information necessary for the D2D group communication from the base station, and transmitting control information for the D2D group communication including a D2D group identifier (ID) as a device ID and D2D user data to two or more communication partner devices belonging to the D2D group.

The invention provides a device discovery method, a device discovery processing method and a device discovery processing device. The device discovery method includes that a network side entity dispenses wireless resources in a designated area, the wireless resources are required resources in the process of D2D (device to device) discovery; a first device in the designated launches D2D discovery for adjacent devices according to the wireless resources, the network side entity receives discovery signals reported from the adjacent devices, and the discovery signals are received by the adjacent devices, from the first device and correspond to the first device; and the network side entity determines the first device to discover the adjacent devices and / or the adjacent devices to discover the first terminal according to authentication information of the first device and the adjacent devices and the corresponding relation of the discovery signals and the first device. By adopting the above technical scheme, privacy of users in the process of D2D discovery is protected, and meanwhile, control of the network side to the D2D discovery is realized.

Disclosed are a method for checking whether D2D communication between devices for performing D2D communication is possible, and a method for estimating the proximity of devices to base stations and the proximity of devices to one another for reusing wireless resources in device-to-device communication and terminal relay communication. The method according to the present invention may enable the verification of whether D2D communication is possible between devices to establish a D2D connection, and may enable the wireless resources allocated to a cellular link and to other D2D links to be reused. Further, the method of the present invention may enable variations in a link state caused by terminal mobility to be handled, as well as D2D communication between new UEs and D2D communication between a new UE and a legacy UE, to be handled.

The present application discloses a method, an apparatus and a computer program product for allocating resources for a Device-to-Device (D2D) direct communication user equipment in a wireless communication network, wherein the method comprises: transmitting a communication channel status report regarding Device-to-Device direct communication to a base station; receiving resource allocation instructions generated by the base station based on the communication channel status report; and performing Device-to-Device direct communication between user equipments on the allocated resources; the disclosed apparatus comprises transmitting means for transmitting a communication channel status report regarding Device-to-Device direct communication to a base station; receiving means for receiving resource allocation instructions generated by the base station based on the communication channel status report; and performing means for performing Device-to-Device direct communication between user equipments on the allocated resources. By using the method, apparatus and computer program product disclosed in the present application, resource sharing / allocation collision between the D2D user equipment and cellular user equipment can be effectively reduced and use rate of resources can be improved.

A “follow-me” utility runs on each of a plurality devices a person may typically use. This utility monitors applications running on a device and intelligently saves the state of tasks a user is performing. When the follow-me utility detects that the user has initialized another device having the follow-me utility and connectivity to the original device, the utility automatically and transparently creates an environment on the new device so that the user may continue the task at the same point as when he or she last performed the task on the original device. When the user continues a task or starts a new task, the follow-me utility automatically and transparently updates files and task states on any devices having the follow-me utility and connectivity. The follow-me utility may make intelligent task migration decisions based on conditions such as network bandwidth, security policy, location, and device capability.

A session transfer module of a session server provides the capability to a user to direct a transfer of an on-going session from one device to another device while maintaining the session. The session transfer module is invoked by a user in a way consistent with the user interface of the client application, including by a graphical user command, a command line prompt, or a voice command. The client provides a selection of possible devices that may receive the redirected session. The session transfer module receives the selected device with the session redirect command over a communication network. The communication network may be wired (e.g., public switched telephone network (“PSTN”), Internet, etc.,) a wireless network (e.g., digital telephone network, pager network, etc.,) or a combination of the wired and wireless networks. The session transfer module may be configured to discontinue the session with the current device and to block any subsequent messages of the transferring session from reaching the device. The session transfer module may be further configured to access a device profile from a device profile database to convert the blocked messages into a format compatible to the format and / or modality of the redirected device. The session transfer module may be further configured to push the session to the redirected device in response to an activation (e.g., log-on) of the redirected device by the user. Alternatively, the session transfer module may be further configured to push the session back to the device in response to a time-out in the activation of the redirected device.

A device to device (D2D) communication method based on a partial device control is disclosed. According to the present invention, the D2D communication method and, particularly, to a partial device control method for D2D communication a relates to, and provides a D2D resource allocation and release method, a D2D HARQ process operating method, a link adaptation method comprising D2D link power control and adaptive modulation and coding (AMC), a D2D control information signaling method, a CSI reporting method for D2D communication, and contents of a CSI report. The present invention can enhance the advantages of and compensate for the disadvantages of both methods through the combination of a base station control a base station control type D2D communication method and a device control type D2D communication method.

The invention discloses a terminal D2D (device-to-device) cooperation relay communication implementation method in a TD-LTE-A (time division-long term evolution-advanced) system, and relates to a relay communication implementation method in the TD-LTE-A system. The method disclosed by the invention aims at realizing communication coverage on terminals in the TD-LTE-A system under a 4G (4th generation) standard and improving service quality and system throughput. According to the method disclosed by the invention, an on-net idle user in a cell is used as a mobile relay, terminal D2D cooperation relay communication is established with a user on the edge of the cell, relay service is provided for the user on the edge of the cell, the coverage range of the cell, the service quality of the user on the edge and the system throughput are significantly improved by resource allocation and time slot allocation of the cell, and the network construction cost of the system can be further greatly reduced. The method disclosed by the invention is suitable for the TD-LTE-A system.

An apparatus for providing coordination of device to device communication may include a processor. The processor is configured to communicate a request for a resource allocation to a network communication node (300). The resource allocation is related to resources usable for device to device communication between a first terminal communicating the request and a second terminal. The processor is further configured to receive a resource allocation including an amount and duration of resources to be used for the device to device communication in response to the request (310), and utilize the resource allocation for device to device communication with the second terminal (320).

Provided is a method of processing hybrid automatic repeat request (HARQ) and adaptive transmission of a device-to-device (D2D) link. In the method, an operation method of user equipment (UE) includes (a) receiving an initial transmission mode (TM) and transmission power for the D2D link from a base station, and performing data transmission through the D2D link, (b) determining, at the UE, a TM and transmission power of a succeeding subframe, or receiving a TM control value and a transmission power control value from counterpart UE of the D2D link and determining the TM and the transmission power of the succeeding subframe, and (c) performing the data transmission to the counterpart UE using the determined TM and transmission power. Here, (b) and (c) are repeated.

A resource allocation method of a base station for a device-to-device (D2D) communication link based on a cellular communication system includes providing operation information which includes information about one or more resource allocation patterns available for the D2D communication link to terminals which perform D2D communication according to each terminal and each D2D communication link, receiving a buffer status report (BSR) from the terminals which perform the D2D communication, and transmitting an indication value which indicates at least one of the resource allocation patterns based on the BSR. Accordingly, in the resource allocation method, low capacity of downlink control channels is required by the base station, yet flexible and efficient allocation of resources is enabled.

Provided is a control method for device-to-device (D2D) communication. A base station measures a load of a cell, receives location information about each piece of user equipment (UE) from a plurality of pieces of UE, selects any one of an overlay-based resource allocation method and an underlay-based resource allocation method on the basis of the measured cell load and the location information about the respective pieces of UE, allocates resources for D2D communication on the basis of the selected resource allocation method, and controls power according to the locations of the pieces of UE and a density of pieces of cellular communication UE. Accordingly, it is possible to improve resource use efficiency and efficiently remove interference.

A method and corresponding equipment by which software (11c) on a first device (11) is virally or otherwise distributed to a second device (12), in which the first device (11) and second device (12) and possibly also a server (16) of the software (11c) exchange information sufficient for the first device (11) to determine whether it includes or stores a version of the software (22c) compatible with the second device (12), and if so, then provides a compatible version, but otherwise exchanges information with the second device sufficient for the second device to obtain a copy from the server (16).

The invention discloses a communication method and a communication system from a device to a device and user devices. The method includes that a first user device detects a second reference signal sent by a second user device; the first user device sends a synchronization parameter according to a detected result; and according to the synchronization parameter, the second user device confirms a data transmission timing when the second user device carries out device-to-device (D2D) communication with the first user device. The method solves the technical problem that during the communication process in the prior art, a tradition cellular communication mode cannot be continuously used for achieving that service data are directly transmitted between user experience (UE), the purpose that under the situation that synchronization is successful, the D2D data sending timing is confirmed between the user devices is achieved, and therefore the technical effect of achieving the D2D communication in a cellular is achieved under the situation that complexity of the user devices is not remarkably increased.

The invention discloses a method and a device for D2D (door-to-door) terminal communication. The method comprises the following steps that: a first user device obtains information related with a distance, wherein the distance is a distance between the first user device and a second user device; the first user device reports the information related with the distance to a base station; the first user device or the second user device sends a first device-to-device caching state report to the base station, wherein the first device-to-device caching state report comprises a caching state report of the first user device and / or a caching state report of the second user device; and the first user device receives the first device-to-device caching state report responding to the base station, distributes the resources and transmitting powers used by device-to-device communication between the first user device and the second user device according to the information related with the distance, and performs the device-to-device communication based on the distributed resources and the distributed transmitting powers used by the device-to-device communication between the first user device and the second user device.