摘要:
Methods and apparatus are provided for transmitting from a base station and for receiving from a low cost user equipment (UE) system information and for the low cost UE to determine subframes to receive repetitions of a transmission from the base station or to transmit repetitions of a transmission to the base station.
摘要:
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as a Long Term Evolution (LTE). A method of a base station (BS) to implement a listen-before-talk (LBT) protocol is provided. The method includes generating for transmission at least one of a discovery reference signal (DRS) or a data signal. The method also includes initiating an LBT protocol based on a single sensing interval to access a channel and transmit the DRS in contiguous orthogonal frequency-division multiplexing (OFDM) symbols. The method further includes initiating an LBT protocol with random back-off to access the channel and transmit the data signal, where a back-off counter value of the LBT protocol with random back-off does not decrement when the DRS is transmitting in the channel.
摘要:
Methods and apparatus are provided to improve spectral efficiency, coverage, and data rates for communication between a base station and user equipments (UEs). In a first case, mechanisms to reduce a size of a random access response message are provided. In a second case, mechanisms to support UE-group scheduling are provided. In a third case, control signaling designs according to a coverage requirement for a UE are provided. In a fourth case, designs for allocation of downlink (DL) subframes and uplink (UL) subframes in order to adjust a data rate and minimize switching between DL and UL for a half-duplex FDD UE are provided.
摘要:
A method for channel state information (CSI) measurement. The method comprises receiving a reference signal that is periodically transmitted in one or more discovery reference signal (DRS) occasions from an eNodeB (eNB) operating in a cell over an unlicensed spectrum band, wherein the reference signal in the one or more DRS occasions is dropped in accordance with at least one of a listen before talk (LBT) operation and a discontinuous transmission (DTX) operation and the reference signal includes at least one of a cell-specific reference signal (CRS) and a channel state information-reference signal (CSI-RS). The method further comprises measuring the received reference signal to generate a CSI measurement report and transmitting the CSI measurement report to the eNB according to a configuration received from the eNB.
摘要:
Methods and apparatus are provided for a base station to transmit and for a User Equipment (UE) to receive repetitions of an enhanced physical downlink control channel (EPDCCH) transmission or of a physical downlink shared channel (PDSCH) transmission. The UE is configured by the base station a set of numbers of repetitions for an EPDCCH transmission or a PDSCH transmission, respectively. The base station transmits an EPDCCH or a PDSCH according to a first number of repetitions from the set of numbers of repetitions. The UE determines a number, from the set of numbers, of repetitions for an EPDCCH reception in order to determine a first subframe for a reception of a PDSCH or a first subframe for a transmission of a physical uplink shared channel (PUSCH).
摘要:
A system and method for communicating with a coverage enhanced user equipment (UE), the method comprising: transmitting, to the coverage enhanced UE, physical downlink shared channels (PDSCHs) carrying system information block1 (SIB1) by using the scheduled resources, wherein the transmission of the PDSCHs carrying the SIB1 is repeated in a time period and in frequency resources, and wherein the frequency resources are identified according to a hopping pattern determined based on a system bandwidth..
摘要:
One or more embodiments provide a method implemented in a user equipment (UE) used in a wireless communications system. The method includes transmitting an indication to a base station that the UE is capable of transmitting on a single uplink carrier frequency and downlink carrier aggregation. The method also includes receiving an uplink carrier frequency switching pattern from the base station. The method also includes switching uplink carrier frequencies based on the uplink carrier frequency switching pattern.
摘要:
A method and apparatus provide a user equipment (UE) comprising:a transceiver configured to transmit or receive signals; anda processor coupled with the transceiver and configured to allocate power to uplink channel transmissions according to a priority order, in case that the UE operates with carrier aggregation, CA and a total transmit power for the uplink channel transmissions exceed a maximum transmission power in linear value,wherein the priority order is defined that:an uplink channel transmission with hybrid automatic repeat request acknowledgement, HARQ-ACK, is prioritized over a uplink channel transmission with channel state information, CSI, andan uplink channel transmission with CSI is prioritized over a uplink channel transmission without HARQ-ACK or CSI.
摘要:
Methods and apparatus are described for forming Control Channel Elements (CCEs) from Resource Element Groups (REGs) that are located in one or more Physical Resource Block (PRB) pairs from a set of PRB pairs, for determining a first symbol in a Transmission Time Interval (TTI) for a Physical Downlink Shared Channel (PDSCH), and for determining whether the PDSCH includes all PRB pairs indicated by a respective PDCCH scheduling the PDSCH.
摘要:
Methods and apparatus are described for a User Equipment (UE) with reduced processing capabilities (e.g., Machine Type Communication (MTC) UE) to transmit and receive signaling are provided. The Downlink Control Information (DCI) formats scheduling a transmission of a Physical Uplink Shared CHannel (PUSCH) or a reception of a Physical Downlink Shared CHannel (PDSCH) are designed and have a smaller size than respective DCI formats for conventional UEs. DCI formats scheduling PUSCHs to or PDSCHs for a group of MTC UEs are also designed and can have a same size as DCI formats scheduling PUSCH or PDSCH for an individual MTC UE.