Abstract: Various examples and schemes pertaining to enhanced cell selection mechanisms in mobile communications are described. A user equipment (UE) performs a cell selection or reselection procedure to select a cell of a wireless network and establishes a wireless connection with the selected cell. In performing the cell selection or reselection procedure, the UE determines a frequency band and a subcarrier spacing (SCS) configuration by checking a profile, and the UE performs the cell selection or reselection procedure in the frequency band based on the SCS configuration.

Abstract: Aspects of the disclosure provide a method and an apparatus for performing a bandwidth part (BWP) switching process within different switching delays. For example, the apparatus can include receiving circuitry and processing circuitry. The receiving circuitry can receive from a BS a signaling indicating a change to a BWP configuration of the UE. The processing circuitry can perform a BWP configuration switching process based on the change to the BWP configuration to switch an active BWP configuration to a new BWP configuration, and monitor data transmission from the BS with the new BWP configuration either after a first predefined switching delay when the change to the BWP configuration includes at least one of a predefined set of BWP configuration parameters or after a second predefined switching delay when the change to the BWP configuration does not include any one of the predefined set of BWP configuration parameters.

Abstract: Apparatus and methods are provided for candidate beam detection (CBD) in DRX mode. In one novel aspect, the CBD evaluation period uses the uniformed scaling factor and the base period for the CBD evaluation period is the same when no DRX is configured and when the DRX is configured with DRX cycle length smaller than or equals to a predefined threshold. In one embodiment, the UE receives DRX configuration including a DRX cycle length, determines a base period for an evaluation period of CBD measurements based on the DRX cycle length and determines a multiplicator for the evaluation period based on a scaling factor and one or more measurement factors, and performs CBD measurements based on the evaluation period, wherein the evaluation period is based on the determined base period and the multiplicator. In one embodiment, the scaling factor is the same for all DRX configurations.

Abstract: A user equipment terminal (UE) operates in a wireless network. The UE receives, from a base station, timing advance parameter values which indicate a time difference measured by the base station between uplink and downlink for a band occupied by one or more serving cells. The UE calculates a length of a post-measurement gap (post-MG) time period for the one or more serving cells based on the timing advance parameter values. The post-MG time period is after a measurement gap before uplink transmission. The UE then sends an indication of the length of the post-MG time period to the base station.

Abstract: Various examples with respect to synchronization signal block (SSB) raster shift in mobile communications are described. A processor of a user equipment (UE) performs an initial cell search to identify a cell among one or more cells of a wireless communication system. The processor then camps on the identified cell. In performing the initial cell search, the processor scans through a plurality of SSB entries for frequency bands below 3 GHz with a SSB raster spacing and a SSB raster offset frequency that support sub-carrier spacing (SCS) spaced channel raster and 100 kHz channel raster for both 15 kHz SCS and 30 kHz SCS. A minimum channel bandwidth at 5 MHz or higher for 15 kHz SCS or at 10 MHz or higher for 30 kHz SCS is supported. The SSB raster spacing is a common multiple of 15 kHz and 100 kHz. The SSB raster offset frequency for 100 kHz channel raster is a multiple of 30 kHz plus/minus 10 kHz.

Abstract: Techniques and examples of determination of receiver (RX) beam for radio link monitoring (RLM) based on available spatial quasi-co-location (QCL) information in New Radio (NR) mobile communications are described. An apparatus receives downlink (DL) signaling from a network. The apparatus determines whether to extend an evaluation period of RLM based on a quasi-co-location (QCL) association provided in at least the DL signaling. The apparatus then executes extension of the evaluation period of the RLM, or not, based on a result of the determining.

Abstract: A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a cell. The controller receives first barring information and second barring information from the cell via the wireless transceiver, and ignores the first barring information in response to the UE supporting network-based Cell-specific Reference Signal (CRS) interference mitigation. Also, the controller allows the UE to access the cell in response to the UE supporting network-based CRS interference mitigation and the second barring information indicating that the cell is not barred.

Abstract: A method can include receiving measurement configurations for measuring serving/neighboring cells at a user equipment (UE) in a wireless communication system. The measurement configurations can indicate multiple measurement objects (MOs) each with a SSB measurement timing configuration (SMTC) specifying a sequence of SMTC window durations (i.e. SMTC occasions), and a sequence of gap occasions. The MOs can be measured within the SMTC occasions that overlap the gap occasions. The method can further include determining a carrier-specific scaling factor for a target MO in the multiple MOs based on candidate MOs to be measured in each of the gap occasions.

Abstract: A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a service network. The controller receives a measurement configuration and a Discontinuous Reception (DRX) configuration from the service network via the wireless transceiver, extends a measurement period indicated by the measurement configuration, and performs a cell measurement via the wireless transceiver in the extended measurement period.

Abstract: A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a first service network and a second service network. The controller receives a Radio Resource Control (RRC) message comprising a measurement configuration for SFN (System Frame Number) and Frame Timing Difference (SFTD) from the first service network via the wireless transceiver, performs first SFTD measurements between a Primary Cell (PCell) of the first service network and neighbor cells of the second service network via the wireless transceiver in response to the measurement configuration for SFTD indicating the neighbor cells, and sends a result of the first SFTD measurements to the first service network via the wireless transceiver.

Abstract: A method of modulating and demodulating superposed signals for MUST scheme is proposed. A transmitter takes bit sequences intended for multiple receivers under MUST scheme to go through a “bit sequence to constellation points” mapper before entering the modulators to satisfy the Gray coding rule and to achieve high demodulation performance for the receivers. In a first method, each bit sequence is assigned for each constellation point on the constellation map to satisfy one or more conditions under different power split factors. In a second method, the constellation map is divided into sub-regions according to the clustering of the constellation points for bit sequence assignment. A near-UE may use an ML receiver for demodulation and decoding the superposed signal. A far-UE may use an ML receiver or an MMSE receiver for demodulation and decoding the superposed signal.

Abstract: Various examples and schemes pertaining to enhanced cell selection mechanisms in mobile communications are described. A user equipment (UE) performs a cell selection or reselection procedure to select a cell of a wireless network and establishes a wireless connection with the selected cell. In performing the cell selection or reselection procedure, the UE determines a frequency band and a subcarrier spacing (SCS) configuration by checking a profile, and the UE performs the cell selection or reselection procedure in the frequency band based on the SCS configuration.

Abstract: Methods on radio resource management (RRM) configurations and procedures in wireless communication are described herein. In particular, methods are described for providing a reference signal strength indicator (RSSI) measurement timing configuration (RMTC). In some embodiments, a UE may perform a RSSI measurement based on the RMTC on at least on downlink (DL) symbol outside of a synchronization signal (SS) block. Also described herein are methods for inter-frequency SSB measurement, and methods for RLM configurations and procedures.

Abstract: Methods to support measurements for LTE user equipments are proposed. Due to reduced bandwidth design for cost reduction, resources for UEs are limited to contiguous six physical resource block (PRB) pairs (1.4 MHz). Six or less contiguous PRBs per narrow sub-band located in the whole channel bandwidth is allocated for transmission and reception for UEs. Novel control channel and data channel designs are proposed to make UEs be able to camp on LTE cells. Methods for intra-frequency measurement, for received signal time difference (RSTD) measurement, and for channel quality assessment for UEs are also provided. In one embodiment, UE is allocated with a measurement gap for intra-frequency measurements and RSTD measurements. In another embodiment, UE is configured with a frequency-hopping pattern and receives a PRB pair starting index per subframe for CSI measurement.

Abstract: Apparatus and methods are provided for RRM measurement in the NR network. In one novel aspect, the RRM measurement is configured with one measurement gap for SS block and CSI-RS. In one embodiment, an extended MGL (eMGL) is configured such that the SS block and CSI-RS is measurement within one measurement gap. In another embodiment, the shorter MGL (sMGL) that is shorter than the standard MGL is configured. In another novel aspect, the CSI-RS is allocated adjacent to the SS blocks such that one measurement gap is configured for both the SS block and CSI-RS measurement. In another novel aspect, the CSI-RS measurement is conditionally configured. In yet another novel aspect, the UE decodes the time index of the SS block conditionally.

Abstract: Apparatus and methods are provided for RRM measurement in the NR network. In one novel aspect, the RRM measurement is configured with one measurement gap for SS block and CSI-RS. In one embodiment, an extended MGL (eMGL) is configured such that the SS block and CSI-RS is measurement within one measurement gap. In another embodiment, the shorter MGL (sMGL) that is shorter than the standard MGL is configured. In another novel aspect, the CSI-RS is allocated adjacent to the SS blocks such that one measurement gap is configured for both the SS block and CSI-RS measurement. In another novel aspect, the CSI-RS measurement is conditionally configured. In yet another novel aspect, the UE decodes the time index of the SS block conditionally.

Abstract: Methods to support measurements for LTE user equipments are proposed. Due to reduced bandwidth design for cost reduction, resources for UEs are limited to contiguous six physical resource block (PRB) pairs (1.4 MHz). Six or less contiguous PRBs per narrow sub-band located in the whole channel bandwidth is allocated for transmission and reception for UEs. Novel control channel and data channel designs are proposed to make UEs be able to camp on LTE cells. Methods for intra-frequency measurement, for received signal time difference (RSTD) measurement, and for channel quality assessment for UEs are also provided. In one embodiment, UE is allocated with a measurement gap for intra-frequency measurements and RSTD measurements. In another embodiment, UE is configured with a frequency-hopping pattern and receives a PRB pair starting index per subframe for CSI measurement.

Abstract: A new air interface that is interference cancellation friendly is proposed. In one novel aspect, a novel code rate assignment with rate splitting is proposed. In one embodiment, a base station decomposes a codeword {x1} into two codewords {x1a} and {x1b}. The two codewords are applied with different code rates and/or modulation orders. More specifically, the code rate or modulation order of codeword {x1a} is set appropriately so that a victim UE can decode and cancel {x1a} under the channel quality of the victim UE. Typically, the channel quality of a victim UE is poorer than the channel quality of the intended UE. As a result, the MCS for {x1a} can be lower than the MCS for {x1b} such that the victim UE is able to apply CWIC to decode and cancel {x1a}.

Abstract: A method of modulating and demodulating superposed signals for MUST scheme is proposed. A transmitter takes bit sequences intended for multiple receivers under MUST scheme to go through a “bit sequence to constellation points” mapper before entering the modulators to satisfy the Gray coding rule and to achieve high demodulation performance for the receivers. In a first method, each bit sequence is assigned for each constellation point on the constellation map to satisfy one or more conditions under different power split factors. In a second method, the constellation map is divided into sub-regions according to the clustering of the constellation points for bit sequence assignment. A near-UE may use an ML receiver for demodulation and decoding the superposed signal. A far-UE may use an ML receiver or an MMSE receiver for demodulation and decoding the superposed signal.

Abstract: A new air interface that is interference cancellation friendly is proposed. In one novel aspect, a novel code rate assignment with rate splitting is proposed. In one embodiment, a base station decomposes a codeword {x1} into two codewords {x1a} and {x1b}. The two codewords are applied with different code rates and/or modulation orders. More specifically, the code rate or modulation order of codeword {x1a} is set appropriately so that a victim UE can decode and cancel {1a} under the channel quality of the victim UE. Typically, the channel quality of a victim UE is poorer than the channel quality of the intended UE. As a result, the MCS for {1a} can be lower than the MCS for {1b} such that the victim UE is able to apply CWIC to decode and cancel {1a}.