摘要:
A method, an apparatus, and a computer program product for wireless communication are provided that may help account for scenarios in which a transport block size (TBS) for a retransmission may be determined based on a first grant, while a number of resource blocks (RBs) assigned for the retransmission may be determined from a second grant.
摘要:
Certain aspects of the present disclosure relate to techniques for carrier preconfiguration for monitoring for transmissions of downlink control information (DCI), for example, conveyed in physical downlink control channel (PDCCH) transmissions utilizing multiple carriers. The methods and apparatuses described herein may be applied in both frequency division duplex (FDD) and time division duplex (TDD) systems.
摘要:
In co-channel heterogeneous networks, subframes may be partitioned between several evolved Node Bs (eNBs) including eNBs of different power classes. Lower power eNBs may have a reduced range due to interference from neighboring higher power eNBs. Rate matching on the UE allows the UE, during communication with a low power eNB, to avoid transmitting on Resource Elements (REs) which experience interference from common resource signals of an interfering base station.
摘要:
A frontend receiver of a user equipment (UE) is configured with multiple transform operations assigned to separate sets of cells. One set of cells includes the serving cell of the UE and at least one additional cell within a first offset range of the serving cell. Another set or sets of cells include additional interferer cells within another offset range of the serving cell. After tracking the common frequency/timing offsets of each set of cells the assigned transform operation for that set transforms the time domain samples into frequency domain symbols. The individual frequency/timing offsets for each cell within the set are then tracked.
摘要:
Techniques for transmitting UE-specific reference signals (UE-RSs) in a wireless network are described. In an aspect, a UE-RS may be transmitted in different manners depending on the number of layers used for data transmission. In one design, a cell may determine subcarriers for a UE-RS based on a frequency shift if data is transmitted on one layer and based on a predetermined set of subcarriers (with no frequency shift) if data is transmitted on multiple layers. In another aspect, a UE-RS may be transmitted on subcarriers determined based on a frequency shift for data transmission on multiple layers. In yet another aspect, a UE-RS may be transmitted from a plurality of cells to a UE for coordinated multi-point (CoMP). In yet another aspect, a UE-RS may be transmitted in a data section of a subframe including only the data section.
摘要:
Systems and methodologies are described that facilitate signaling Physical Hybrid Automatic Repeat Request (HARQ) Indicator Channel (PHICH) resource assignments in a wireless communication environment. At least a portion of a current PHICH resource assignment for a current Transmission Time Interval (TTI) and at least a portion of a subsequent PHICH resource assignment for a subsequent TTI can be encoded within a common encoded signal. Further, the common encoded signal can be sent to an access terminal during the current TTI. For instance, the common encoded signal can be transmitted via a Physical Broadcast Channel (PBCH). Alternatively, the common encoded signal can be sent through dedicated Radio Resource Control (RRC) signaling during handover. The access terminal can decode the common encoded signal received from the base station to identify the current PHICH resource assignment (or portion thereof) and the subsequent PHICH resource assignment (or portion thereof).
摘要:
Techniques for facilitating cell search by user equipments (UEs) in a wireless communication system are described. In an aspect, a primary synchronization code (PSC) sequence may be generated based on a Frank sequence and a constant amplitude sequence that is repeated multiple times. In another aspect, a set of PSC sequences may be generated based on complementary sequences having good aperiodic correlation properties and efficient implementations. In one design, PSC sequences A+B and B+A may be formed based on Golay complementary sequences A and B, there “+” denotes concatenation. In yet another aspect, a set of secondary synchronization code (SSC) sequences may be generated based on a set of base sequences and different modulation symbols of a modulation scheme. Each base sequence may be modulated by each of M possible modulation symbols for the modulation scheme to obtain M different SSC sequences.
摘要:
Techniques for transmitting beacon signals to assist user equipments (UEs) perform cell search and techniques for detecting for beacon signals are described. In an aspect, cells may be assigned beacon patterns defined based on orthogonal grouping of subcarriers. U subcarriers usable for beacon may be arranged into G orthogonal groups, with each group including S subcarriers. P=SG different beacon patterns may be defined based on the G groups of S subcarriers. In another aspect, the cells may transmit their beacon signals at configurable transmit power levels, which may be determined based on target beacon detection performance. In yet another aspect, a UE may perform overlapping DFTs in order to capture more received power when symbol timing at the UE is not aligned with symbol timing of cells being detected. In yet another aspect, the UE may perform beacon detection with maximal likelihood decoding.
摘要翻译:描述用于发送信标信号以辅助用户设备(UE)执行小区搜索和用于检测信标信号的技术的技术。 在一个方面,可以为基站分配基于子载波的正交分组定义的信标模式。 可用于信标的U个子载波可以被布置成G个正交组,每个组包括S个子载波。 P =可以基于S个子载波的G组来定义SG不同的信标模式。 在另一方面,小区可以以可配置的发射功率电平发送它们的信标信号,这可以基于目标信标检测性能来确定。 在另一方面,当UE处的符号定时不与检测到的小区的符号定时对准时,UE可以执行重叠的DFT以便捕获更多的接收功率。 在另一方面,UE可以以最大似然解码来执行信标检测。
摘要:
Systems and methodologies are described that facilitate detecting cell interference and/or loading by analyzing control data transmitted between devices communicating in the cell. Control data resources can be transmitted related to communication received over data channels, and the control data resources can comprise quality indicators related to the data as well as resource identifiers that specify a resource over the data channel related to the data. Multiple control data resources can be transmitted per communication specifying a beginning and ending resource identifier of related data channel resources. If this control data is decodable at a wireless device, the associated resources corresponding to the resource identifiers can be marked as interfered and/or avoided in subsequent communication or resource allocation requests by the wireless device.