Abstract:
A method, apparatus and computer program product are provided in order to allow an uplink resource request to be transmitted to the access point even in an instance in which the mobile terminal is receiving a continuous downlink transmission and repeated ACK/NACK transmissions are enabled. In this regard, a method, apparatus and computer program product are provided to prioritize a preamble transmission for a random access procedure relative to the repeated ACK/NACK transmissions. The method, apparatus and computer program also prioritize at least one message of the random access procedure.
Abstract:
There is proposed a mechanism for controlling and conducting a discovery procedure of small cells or secondary cells located in a macro cell or primary cell. The discovery procedure is based on a discovery signal communicated via PDCH and based on a positioning reference signal (PRS). For configuring the signaling of the discovery signal, frequency domain multiplexing for splitting resources of the PRS in the frequency domain for increasing capacity, and/or usage of reserved communication resources for the signaling of the discovery signal are employed. Assistance information is provided to the UE for supporting the discovery of small cells.
Abstract:
There is provided a method comprising: determining, at a first user terminal capable of performing a direct device-to-device, D2D, communication with a second terminal, whether to advance transmission in the D2D communication or not; obtaining information indicating whether the second user terminal is advancing its transmission in the D2D communication or not; and determining a structure for at least one communication interval in a D2D communication pattern at least partly based on the application of transmission timing advances at the first and second user terminals, wherein the D2D communication pattern comprises communication intervals allocated for communication for the first user terminal with respect to the second user terminal.
Abstract:
A method, apparatus and computer program product are provided for generating Reference Signals utilized in downlink tracking of an unlicensed band. A method and apparatus may determine whether carriers of an unlicensed band secondary component carrier are available for usage to provide a signal(s), enabling timing and frequency tracking of downlink carriers responsive to discontinuous transmission via a medium(s) of the unlicensed band utilized to provide content to devices. The method and apparatus may also select the signal based on a band of the carriers and a detection indicating whether communication terminals of a coexisting system are using a carrier of the band. The method and apparatus may provide the signal to a device(s) via a carrier responsive to determining that the carrier is available or via an occupied carrier utilized by the coexisting system enabling the device to continue tracking of timing and frequency information of the downlink carriers.
Abstract:
The present invention discloses a method, an apparatus and a computer program for resource contention in device-to-device communication links. The method partitions the time-frequency radio resource grid with a resource block set forming the resource unit in the grid, for all available, used and unusable frequency bands around a given virtual central frequency. Each resource block set is partitioned into a common control channel and a data channel. With a given procedure of control data transmission between transmitting and receiving user terminals, the resources are competed and shared. Frequency shifting with short distance frequency change or frequency transference with a larger frequency hopping into a free radio resource is available. The competition procedure is done in order to fairly share the frequency bands as a function of time between different device-to-device communication links in a localized manner.
Abstract:
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 comprise: 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.
Abstract:
A method and apparatus are provided to provide for timely switching between antenna port configurations as the mode of operation of a mobile terminal changes which may, in turn, dictate different combinations of the MIMO, CoMP and/or CA capabilities. In this regard, a method is provided that includes utilizing one or more antennas in a first antenna port configuration in a first mode of operation. The method may also receive a command that triggers switching to another antenna port configuration and then determines another one of a plurality of antenna port configurations to be utilized in response to the command. The method may then utilize one or more antennas of the another one of the antenna port configurations in a second mode of operation. A corresponding apparatus and computer program product are also provided.
Abstract:
Timing control procedure is needed for uplink transmissions in several communication networks. Some networks and bands have physical and regulatory limitations for obtaining timing advance value in conventional manner. One example of these limitations is disabled downlink channel in TV white spaces. The present invention provides an arrangement for obtaining timing advance value in a situation wherein the use of downlink channel is disabled.
Abstract:
A method includes composing downlink control information having a format configured to support a presence of a plurality of transport blocks in a single subframe, where the downlink control information comprises, for the plurality of transport blocks, a common resource allocation and modulation/coding scheme field and a single cyclic redundancy check field. The method further includes transmitting the composed downlink control information to a relay node over a wireless link that comprises a backhaul link from the relay node.
Abstract:
A method is provided for facilitating device-to-device communication. The method may include causing a message to be sent to a first device to trigger the first device to transmit a reference signal to transmit a reference signal. The method may further include causing a request for a channel quality indication to be sent to a second device. The request may indicate that the channel quality indication is to be based on measurement of the reference signal. The method may additionally include receiving the channel quality indication in response to the request. The channel quality indication being indicative of a link quality between the first device and the second device. The method made also include determining based on the received channel quality indication whether to cause establishment of a device-to-device link between the first device. A corresponding apparatus and computer program product are also provided.