Abstract:
Technology described herein relates to systems, methods, and computer readable media to enable a millimeter wave capable small cell (MCSC) devices to receive a handover of a user equipment from a universal mobile telecommunications system terrestrial radio access node B (eNB.) In particular, systems and methods are described for user equipment (UE) association with a MCSC operating as a booster for an eNB in a time division duplexing (TDD) system, including identification of and communication on preferred cell sector between the UE and the MCSC. Protocols for concurrently performing a beam search and time and frequency synchronization for downlink communication are also described. Several sub-frame designs to facilitate these protocols are also described.
Abstract:
Methods and apparatuses for communicating in a wireless network include methods and systems for producing a discovery signal for use in cellular context using unlicensed spectrum having contiguous resource elements in the time domain.
Abstract:
Technologies described herein provide mechanisms and formats to accomplish short transmission time interval (S-TTI) length in wireless communication systems. In one implementation, logic is to: identify S-TTI length based on which to allocate resources of a channel of a radio access network cell; based on the S-TTI length, determine a low latency resource block (LLRB) size according to which to allocate resources of the channel and a demodulation reference signal (DMRS) pattern according to which to transmit DMRSs to user equipment (UE) via the channel; and generate the DMRSs for transmission to the UE using resources identified based on the DMRS pattern. Other embodiments are described and claimed.
Abstract:
The present disclosure provides an uplink demodulation reference signal (DM-RS) transmission. Generating the DM-RS transmission includes receiving, from a serving cell, physical uplink shared channel (PUSCH) parameters including a position of the DM-RS transmission in a time domain and a frequency domain, wherein the DM-RS transmission, in the frequency domain, is transmitted in a pattern that is repeated over p subcarriers within a PUSCH resource allocation. Generating the DM-RS transmission also includes generating a PUSCH transmission in accordance with the PUSCH parameters.
Abstract:
Described are mechanisms for eNB support of DRS in LA A, in which DRS is transmitted at one or more DRS occasions within a DMTC window, subject to LBT. In some embodiments, an eNB may include hardware processing circuitry comprising an antenna port, a first circuitry, a second circuitry, and a third circuitry. The first circuitry may be operable to determine a DMTC window of a wireless communication channel. The second circuitry may be operable to initiate one or more CCA checks through an antenna coupled to the antenna port prior to a DRS occasion within a DMTC time window. The third circuitry may be operable to initiate a DRS transmission through the antenna within the DMTC window upon a CCA check of the set of one or more CCA checks sensing that the wireless communication channel is idle. Also described are mechanisms for proactive support of DRS in LAA.
Abstract:
An arrangement is configured to be employed within a user equipment (UE). The arrangement includes control circuitry. The control circuitry is configured to receive a downlink communication from an evolved Node B (eNodeB). The downlink communication includes a hybrid automatic repeat request (HARQ). The control circuitry is also configured to obtain a flexible HARQ configuration for a HARQ cycle, process the downlink communication and generate a HARQ feedback using the flexible HARQ configuration.
Abstract:
Embodiments of latency reduction for wireless data transmission are generally described herein. A user equipment (UE) identifies a shortened transmission time interval (xTTI) length configuration for a time division duplexing (TDD) component carrier (CC), the xTTI length configuration comprising a length in time or a length in orthogonal frequency division multiplexing (OFDM) symbols. The UE identifies scheduling timing and hybrid automatic repeat request (HARQ) timing of physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH) on the TDD CC based on the identified xTTI length configuration. The UE signals for transmission of a HARQ acknowledgement (HARQ-ACK) based on the identified xTTI length configuration.
Abstract:
Techniques for detecting puncturing of a first PDSCH (physical downlink shared channel) associated with a UE (user equipment) by a second PDSCH with a shorter TTI (transmission time interval) are discussed. A base station (e.g., Evolved NodeB or eNB) can configure the UE for potential puncturing and/or parameter(s) of the second PDSCH. The UE can detect puncturing of the first PDSCH based on the configuration, and can discard punctured symbols to mitigate interference from the second PDSCH.
Abstract:
Technology for contention free physical uplink shared control channel (PUSCH) transmission using listen before talk procedure is disclosed. In an example, an apparatus of a user equipment (UE) having circuitry configured to achieves low latency synchronization with an anchor enhanced Node (eNB) by sensing for a predetermined time period if any physical uplink shared channels (PUSCH) are idle with the anchor eNB for uplink (UL) synchronization; providing a unique UE identification in a PUSCH transmission; and communicating the PUSCH transmission in one of the idle PUSCH channels for contention free communication with the anchor eNB for uplink synchronization.
Abstract:
An eNodeB (eNB), user equipment (UE) and method of providing a dynamically determined guard interval (GI) sequence are generally described. Uplink and downlink TDD subframes may each contain a block having a symbol and a GI sequence. The GI sequences may differ or be the same between the different subframes and the GI sequences may depend on an estimation of channel delay spread, a cell identifier (ID) of a cell to which the UE is configured to communicate, and a UE ID. The uplink or downlink subframe may comprise a guard time. A last block of the downlink subframe or first block of the uplink subframe may contain the GI sequence and the guard time and a first block of the uplink subframe or last block of the downlink subframe respectively may contain an additional GI sequence to maintain cyclicity.