Abstract: According to one aspect of the disclosure, a wireless device is configured to transmit a random access preamble. The wireless device includes processing circuitry. The processing circuitry is configured to obtain a tone index, and determine a location within a frequency band for transmitting the random access preamble based on the obtained tone index.

Abstract: A network node determines a first transmission parameter for transmission of downlink control channel scheduling the downlink control information provided to a wireless device in a first signal, and selects either the first transmission parameter or one or more different second transmission parameters for transmission of the downlink control channel scheduling for the downlink control information provided to the wireless device in one or more second signals. To allow flexibility and efficient use of resources, the first signal sent by the base station indicates the one or more second transmission parameters as well as the selected transmission parameter(s) for the second signals. In one exemplary embodiment, the first and second transmission parameters comprise first and second control resource set (CORESET) configurations. In another exemplary embodiment, the first and second transmission parameters comprise first and second search spaces.

Abstract: Methods and apparatus are disclosed for enabling a narrow-band MTC device to operate in a legacy LTE system having a wider system bandwidth. The physical downlink control channel for a narrow-band MTC device, also referred to as low-complexity physical downlink control channel (LC-PDCCH), has reduced bandwidth resource and can support no more than 6 physical resource blocks. The present application discloses how to allocate physical resource blocks (PRBs) for LC-PDCCH and physical downlink shared channel (PDSCH). The PRB allocation methods disclosed herein allow the MTC devices to derive the frequency location of the PDSCH PRBs from the frequency location of the LC-PDCCH PRBs and to soft-combine LC-PDCCH transmissions and PDSCH transmissions for performance improvement.

Abstract: Methods and apparatuses for random access. A method performed by a terminal device comprises determining a random access procedure to be performed, the random access procedure being one of a two-step random access procedure and a four-step random access procedure, and transmitting a request message for random access in the determined random access procedure.

Abstract: Methods, a base station, and a terminal device for two-step random access procedure are disclosed. The base station transmits a signalling message indicating a waveform of a physical uplink shared channel (PUSCH) without including a waveform of a preamble which is to be used for message A in two-step random access procedure, through an air interface. The base station receives the message A using the waveform of the PUSCH through the air interface in two-step random access procedure.

Abstract: According to some embodiments, a method in a wireless device of performing random access comprises receiving a random access configuration. The random access configuration comprises one or more associations of a synchronization signal block (SSB), a preamble sequence, and physical random access channel (PRACH) configuration resources. The PRACH resources comprise time domain resources and frequency domain resources. The method further comprises receiving one or more SSBs; selecting one of the one or more received SSBs; and selecting a preamble sequence. The preamble sequence is associated with the selected SSB in the random access configuration. The method further comprises transmitting the selected preamble sequence on PRACH resources associated with the selected SSB in the random access configuration.

Abstract: According to one aspect of the disclosure, a wireless device is configured to transmit a random access preamble. The wireless device includes processing circuitry. The processing circuitry is configured to obtain a tone index, and determine a location within a frequency band for transmitting the random access preamble based on the obtained tone index.

Abstract: The present disclosure relates to a first radio node configured for orthogonal frequency division multiplexing (OFDM), comprising a receiver, a transmitter, a processor and a memory storing instructions executable by the processor for causing the transmitter in a first mode of operation with a first subcarrier spacing f1: to transmit a sequence of prefixed OFDM symbols, and in a second mode of operation with a second subcarrier spacing f2: to transmit a sequence of prefixed OFDM symbols, wherein the sequence of transmitted OFDM symbols is aligned with a predefined repeating radio frame, which is common to both the first and second modes of operation, or with an integer multiple of the predefined repeating radio frame; and the first and second subcarrier spacings are related by an integer factor, f1/f2=p or f1/f2=1/p, with p?1 integer.

Abstract: According to some embodiments, a method for use in a user equipment (UE) of acquiring system information or a synchronization signal comprises receiving, from a network node, a plurality of subframes. Each subframe includes a repetition of either system information or a synchronization signal. The repetition is divided into a number (N) of transmission blocks in a frequency domain of a first bandwidth (N>1). The method further comprises combining N transmission blocks from one or more repetitions of the respective received plurality of subframes to decode the system information or synchronization signal. The UE may comprise a narrowband wireless device operable to receive a bandwidth less than the first bandwidth, and combining N transmission blocks to decode the system information or synchronization signal may comprise combining at least one transmission block from two or more repetitions of two or more respective subframes of the plurality of subframes.

Abstract: A communications network is being accessed by a wireless device associated with a coverage class selected from a set of coverage classes. The wireless device performs a method comprising initiating network access to the communications network by transmitting a preamble sequence for random access on a physical random access channel during a starting opportunity defined by the coverage class of the wireless device. Each coverage class may be associated with a unique number of repetitions of the preamble sequence transmission.

Abstract: A scheme for control resource set (CORESET) control channel element (CCE) to resource element group (REG) mapping. The terminal device determines a set of physical downlink control channel (PDCCH) candidates based on one or more CORESET CCE to REG mapping related parameters. The one or more CORESET CCE to REG mapping related parameters are fixed. In one scheme, the terminal device obtains information by detecting a synchronization signal (SS)/physical broadcast channel (PBCH) block. The terminal device determines one or more CORESET CCE to REG mapping related parameters, based on the information obtained during the detection of the SS/PBCH block. A correspondence between the one or more CORESET CCE to REG mapping related parameters and the obtained information is predefined between the terminal device and a BS. The terminal device determines a set of PDCCH candidates based on the one or more CORESET CCE to REG mapping related parameters.

Abstract: There is disclosed a method of operating a network node in a radio access network. The method includes transmitting first numerology information indicating a first numerology for a carrier, the first numerology having a first subcarrier spacing and a first frequency reference. The method also includes transmitting a frequency shift indication indicating a second frequency reference for a second numerology for the same carrier, the frequency shift indication indicating the second frequency reference in relation to the first frequency reference. The disclosure also pertains to related methods and devices.

Abstract: The embodiments herein relate to timing advance offset for uplink/downlink switching in New Radio (NR). In one embodiment, there proposes a method in a wireless communication device, comprising: determining a timing advance (TA) offset for uplink/downlink switching, wherein the TA offset is at least based on the time offset requirement for uplink/downlink switching in different scenarios used in communication between the wireless communication device and a network node; applying the determined TA offset in the uplink communication from the wireless communication device to the network node. With embodiments herein, uplink/downlink switching time for NR is defined.

Abstract: The present disclosure relates to a first radio node configured for orthogonal frequency division multiplexing (OFDM), comprising a receiver, a transmitter, a processor and a memory storing instructions executable by the processor for causing the transmitter in a first mode of operation with a first subcarrier spacing f1: to transmit a sequence of prefixed OFDM symbols, and in a second mode of operation with a second subcarrier spacing f2: to transmit a sequence of prefixed OFDM symbols, wherein the sequence of transmitted OFDM symbols is aligned with a predefined repeating radio frame, which is common to both the first and second modes of operation, or with an integer multiple of the predefined repeating radio frame; and the first and second subcarrier spacings are related by an integer factor, f1/f2=p or f1/f2=1/p, with p?1 integer.

Abstract: The present disclosure introduces a method implemented at a user equipment. The method includes: determining, within a physical downlink control channel, one or more bits of a downlink control information that indicates a corresponding physical downlink shared channel carrying a remaining minimum system information or other system information. A user equipment and a corresponding network node are also introduced.

Abstract: The embodiments herein relate to timing advance offset for uplink/downlink switching in New Radio (NR). In one embodiment, there proposes a method in a wireless communication device, comprising: determining a timing advance (TA) offset for uplink/downlink switching, wherein the TA offset is at least based on the time offset requirement for uplink/downlink switching in different scenarios used in communication between the wireless communication device and a network node; applying the determined TA offset in the uplink communication from the wireless communication device to the network node. With embodiments herein, uplink/downlink switching time for NR is defined.

Abstract: Embodiments of the invention include methods, systems, and computer programs to determine synchronization signal (SS) block mapping pattern in a wireless network. In one embodiment, a method is implemented in a terminal device for synchronization signal block (SSB) search in a wireless network, the method includes receiving, by the terminal device from a network device, a message containing synchronization signal block (SSB) information indicating a synchronization signal (SS) block subcarrier spacing (SCS) option, where the SS block SCS option maps to a plurality of SS block pattern candidates. The method continues with obtaining SSB candidate locations, using a SS block pattern determination from the plurality of SS block pattern candidates for the terminal device determined.

Abstract: A method, network device and terminal device for providing remaining minimum system information (RMSI) in a wireless network. A method comprises determining whether a SS/PBCH block in the SS burst set configures the RMSI. In response to that the SS/PBCH block configures the RMSI, transmitting one or more repeated RMSI within a first periodicity.

Abstract: A network node determines a first transmission parameter for transmission of downlink control channel scheduling the downlink control information provided to a wireless device in a first signal, and selects either the first transmission parameter or one or more different second transmission parameters for transmission of the downlink control channel scheduling for the downlink control information provided to the wireless device in one or more second signals. To allow flexibility and efficient use of resources, the first signal sent by the base station indicates the one or more second transmission parameters as well as the selected transmission parameter(s) for the second signals. In one exemplary embodiment, the first and second transmission parameters comprise first and second control resource set (CORESET) configurations. In another exemplary embodiment, the first and second transmission parameters comprise first and second search spaces.

Abstract: A method performed by a wireless device (120) for handling a first transport block received from a transmitting device (101) is provided herein. The first transport block comprises a first set of code blocks. At least a first subset of code blocks has been unsuccessfully decoded by the wireless device (120). The wireless device (120) and the transmitting device (101) operate in a wireless communications network (100). The wireless device (120) determines (802), based on a first number of unsuccessfully decoded code blocks, a second number of code blocks to be allocated in a first memory (1111) of the wireless device (120), to store the unsuccessfully decoded code blocks. The wireless device (120) also allocates (803) the determined second number of code blocks. The wireless device (120) then initiates (805) storage of the unsuccessfully decoded code blocks in the first set, in the allocated determined second number of code blocks.