Patent application number | Description | Published |
20140112259 | Signaling for Random Access in Time Division Duplexed (TDD) Systems with Traffic Adaptation - A next-generation base station can update an uplink-downlink (UL/DL) configuration of a cell more frequently than legacy user equipments (UEs) are configured to recognize UL/DL updates while preventing non-compliant uplink transmissions in downlink subframes. For instance, a next-generation base station can restrict updates to the uplink-downlink configuration such that uplink timeslots previously allocated for random access channel (RACH) transmission opportunities by legacy UEs remain configured for uplink transmission. Alternatively, the next-generation base station can restrict the allocation of RACH transmission opportunities of legacy UEs to timeslots that are statically configured for uplink transmission. Notably, such a restriction may be selectively applied to legacy UEs, so as to not limit the performance of next-generation UEs. | 04-24-2014 |
20140169296 | Systems and Methods for Channel Measurements and Reporting - Embodiments are provided for configuring channel measurements and reporting by a user equipment (UE). The embodiments avoid unnecessary cell measurements and resulting reporting transmissions by the UE in network scenarios with restricted downlink transmissions from serving cells. A method by a network component includes sending, to the UE, a data transmission pattern for transmissions on downlinks from multiple cells serving the UE. The data transmission pattern indicates a plurality of subframes including one or more restricted subframes where transmissions from one of the cells are restricted. The method further includes sending, to the UE, a measurement pattern allocating measurements and reports for a cell from the UE to the cells at corresponding designated subframes of the subframes in the data transmission pattern. The UE transmits measurement reports to an assisting serving cell during the one or more restricted subframes. | 06-19-2014 |
20140177558 | System and Methods for Almost Blank Subframe (ABS) Density and Range Extension Optimization in Heterogeneous Networks - Embodiments are provided for optimizing the Almost Blank Subframe (ABS) pattern in heterogeneous network (HetNet) deployments with multiple small cells. One ABS pattern is used for all small cells. Different small cells can have different downlink loads from user equipments (UEs). An embodiment method includes transmitting a pilot signal in a small cell, and determining downlink load (DLL) information according to a pair of measurements from each UE served by the small cell. The pair of measurements includes a first measurement of the pilot signal and a second measurement of a second pilot signal from a macro cell. The method further includes determining a number of ABSs according to the DLL information, and reporting the DLL information and the number of ABSs to a network entity for selecting ABS density and range extension for the small cell and the macro cell. | 06-26-2014 |
20140269558 | System and Method for Time-Power-Frequency Hopping for D2D Discovery - Embodiments are provided to implement a time/power/frequency hopping scheme for device-to-device (D2D) discovery. The embodiments improve the UE detection of D2D discovery signals from neighboring UEs and account for large number of UEs' discovery signals. This is achieved by having neighboring UEs transmitting at different time instances and at different power levels. Further, neighboring UEs can be configured to transmit on different frequencies. This is achieved by assigning different time/power/frequency sequences to different UEs. An embodiment method includes transmitting, to a UE, parameters a hopping pattern of a first sequence of resources for transmitting a discovery signal by the UE and of a second sequence of resources for receiving a second discovery signal by the UE. The first sequence of resources comprises at least one of a sequence of time instances and a sequence of power levels. The second sequence of resources comprises time instances. | 09-18-2014 |
20140314000 | Systems and Methods for Adaptive Transmissions in Wireless Network - A method for cell adaptation includes receiving, by a user equipment (UE), one or more transmission parameters for a transition reference signal (TRS). One or more cells is transitioned between a reduced activity mode and an active transmission and reception mode in accordance with the TRS. The method further includes the UE determining whether or not to transmit the TRS in accordance with one or more TRS transmission criteria, and the UE transmitting the TRS in accordance with the one or more transmission parameters. | 10-23-2014 |
20140334320 | Systems and Methods for Network Adaptation Support in Wireless Network - Embodiments are provided for implementing network adaptation schemes, including small cell on/off adaptation and transmission power control. In an embodiment method for supporting network adaptation, a network component receives a discovery reference signal (DRS) from a network controller that is in a switch-off transmission mode. The network component then performs measurements according to the DRS, and reports the measurements to a network associated with the network controller. In return, the network component receives a radio resource control (RRC) signaling from the network. The RRC signaling includes configuration information allowing a connection between the network component and the network controller. The network component then connects with the network controller in accordance with the configuration information. | 11-13-2014 |
20150043483 | System and Method for Resource Allocation for Open Discovery in Device-to-Device Communications - A method for performing open discovery in a communications system includes determining, by a device-to-device (D2D) device, resource allocation information for a discovery cycle including discovery resources allocated for transmission of discovery signals by D2D devices. The method also includes selecting, by the D2D device, a first discovery resource of the discovery cycle in accordance with the resource allocation information, and transmitting, by the D2D device, a discovery signal in the selected first discovery resource. | 02-12-2015 |
20150045050 | System and Method for Resource Allocation Device-to-Device for Open Discovery - A method for operating a mobile device adapted for device-to-device (D2D) communications includes determining a utilization measure for discovery resources (DRs) allocated for D2D discovery in a communications system, and sending a utilization measure report to an evolved NodeB (eNB) when a reporting criterion is satisfied, wherein the utilization measure report is configured to prompt an adjustment to a number of DRs allocated for D2D discovery when an adjustment condition is met. | 02-12-2015 |