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: 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: The subject matter described herein relates to data communication in wireless communication systems. The device determines availability of scheduled serving cell before data communication and informs a device the determined availability of the scheduled serving cell. Depending upon the determined availability, the device is controlled to perform the data communication on the scheduled serving cell or another available serving cell. In this way, the unfinished data communication, for example, retransmission of a data block in an uplink or downlink HARQ process can be continued on an available serving cell, whereby avoiding large transmission delay and throughput loss in the wireless communication system.

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: Systems, methods, apparatuses, and computer program products for fair resource sharing among user(s) or user groups in broadcast based D2D communications are provided. One method includes monitoring, by a cluster head, at least one user group sharing physical channel resources. The at least one user group may include at least one D2D user equipment. The method may further include calculating a current share of the physical channel resources for the at least one user group based on pre-configured fair sharing rules, determining when a maximum fair share of the physical channel resources are allocated to one of the at least one user group, determining whether remaining physical resources are sufficient. When the remaining physical resources are sufficient, the method may include issuing an indication to the one of the at least one user group. When the remaining physical resources are not sufficient, the method may include issuing a warning to the one of the at least one user group.

Abstract: The present invention provides a system and method for avoiding mobile relay interference to a primary system on an authorized frequency spectrum.

Abstract: A method and apparatus can be configured to update status information on channel resources. The channel resources are configured for device-to-device communication by a cluster-wise manner. The method can also include transmitting the status information by using broadcasting resources.

Abstract: Systems, methods, apparatuses, and computer program products for handling user equipment (UE) context for dual connectivity in, for example, enhanced small cell networks are provided. One method includes associating small cell identifiers that are assigned by an anchor evolved node B (eNB) with a unique cell identifier related to the anchor eNB, and reporting user equipment (UE) history information in dual connectivity mode to a target evolved node B (eNB). The UE history information comprises at least the unique cell identifier of the anchor eNB.

Abstract: Communication systems, such as the long term evolution (LTE) advanced (LTE-A) of the third generation partnership project (3 GPP) may benefit from various enhancements. These enhancements can include LTE time division duplex (TDD) enhancements for traffic adaptation and uplink (UL)-downlink (DL) interference management. A method can include determining whether a first cell, in a network including the first cell and a second cell, autonomously selects a time division duplex uplink-downlink configuration. The method can also include sending an authority indicator to a base station of the first cell regarding a determination of whether the first cell is to autonomously select the configuration.

Abstract: The subject matter described herein relates to data communication in wireless communication systems. The device determines availability of scheduled serving cell before data communication and informs a device the determined availability of the scheduled serving cell. Depending upon the determined availability, the device is controlled to perform the data communication on the scheduled serving cell or another available serving cell. In this way, the unfinished data communication, for example, retransmission of a data block in an uplink or downlink HARQ process can be continued on an available serving cell, whereby avoiding large transmission delay and throughput loss in the wireless communication system.

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: The subject matter described herein relates to scheduling enhancement in wireless communication. A scheduling grant including an indicator can be generated, for example, at the base station (BS). The indicator included in the scheduling grant identifies multiple carriers to be scheduled with the scheduling grant. Upon receiving the scheduling grant, a device, for example, UE can recognize the multiple carriers scheduled with the single scheduling grant, and can detect corresponding data transmission in the multiple carriers accordingly. Compared with scheduling each carrier with independent scheduling grant, the proposed solution saves control signaling overhead, and thereby alleviates the problems caused by control signaling capacity limitation, and increase peak data rate and system throughput.

Abstract: Configuration of various radio systems may have a number of possible benefits. For example, small cell configuration may be useful for interference mitigation. A method, in certain embodiments, can include determining a virtual subframe index for a cell. The method can also include communicating the virtual subframe index for the cell by communicating a time division duplex configuration and a relative subframe offset.

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: The present invention provides an authorized shared access (ASA) assisted interference coordination method in a heterogeneous time-division duplexing (TDD) relay network. In a TDD relay system architecture, an ASA controller assists a secondary system to perform an interference coordination mechanism by adjusting a time slot structure configuration and synchronization information, and a mobility management entity (MME) obtains a time slot configuration and the synchronization information of a primary system through ASA, and selects, according to relevant information of a relay node inside a management range, an optimal time slot configuration and a working mode for the relay node.

Abstract: The subject matter described herein relates to data communication in wireless communication systems. The device determines availability of scheduled serving cell before data communication and informs a device the determined availability of the scheduled serving cell. Depending upon the determined availability, the device is controlled to perform the data communication on the scheduled serving cell or another available serving cell. In this way, the unfinished data communication, for example, retransmission of a data block in an uplink or downlink HARQ process can be continued on an available serving cell, whereby avoiding large transmission delay and throughput loss in the wireless communication system.

Abstract: Various embodiments of the present invention provide a method for cell reselection, comprising: receiving, at a user equipment, system information from a network node that is shared by two or more operator networks, wherein the system information comprises first information associated with at least one operator network related to one or more neighboring cells for the user equipment; determining whether there is an operator network accessible to the user equipment in the at least one operator network, based at least in part on the first information; and performing a cell reselection procedure only when one or more accessible operator networks are determined.

Abstract: Embodiments of the disclosure provide methods and apparatuses for managing a COMP set in a communication system employing an ASA scheme. According to the method, change information about an affected cell is received, wherein the change information uses an ASA frequency band and overlaps with a protected area of a primary system authorized with the ASA frequency band. The change information is then sent to a serving node coordinating transmission within constituent cells of a CoMP set, to indicate a change of the CoMP set, wherein the affected cell is one of the constituent cells of the CoMP set.

Abstract: The subject matter described herein relates to measurement enhancement in wireless communication. A device informs other devices about the time period during which a channel will be occupied by its transmission, if the device determines to transmit on the channel. A set of occupation time periods can be defined, and then the device can indicate one of the defined occupation time periods to other devices. Upon detection of the indication of the occupation time period, other devices get to know that the channel will be unavailable in at least the indicated time duration, and thus can avoid unnecessary channel sensing or measurement in this time duration to save power.

Abstract: Provided are methods, corresponding apparatuses, and computer program products for performing out-of-band sensing on an unlicensed frequency band. A method comprises sending a configuration message for configuring measurement on at least one channel in a frequency band of a primary system; receiving a measurement report made based upon the configuration message; and determining the usability of the at least one channel based upon the measurement report, wherein the configuration message includes information regarding a respective predetermined threshold of energy detection or primary-system-feature detection, and the measurement report is for reception when a measured energy detection value or a measured primary-system-feature detection value of a received signal on the at least one channel is less than the respective predetermined threshold. With the claimed inventions, the spectrum efficiency would be improved and interference between a secondary system and an LTE system could be alleviated.