Telefonaktiebolaget Lm Ericsson (publ)

Jiangsu University

Nanjing University of Aeronautics and Astronautics

Zhipeng Lin

Robert Mark Harrison

Jingya Li

Robert Baldemair

Jianwei Zhang

Asbjörn Grövlen

Xingqin Lin

Jung-Fu Cheng

Andres Reial

Stefan Parkvall

Mattias Frenne

Jan Christoffersson

Fredrik Ovesjö

Johan Rune

Henrik Enbuske

Yufei W Blankenship

Pål Frenger

Ajit Nimbalker

Henrik Sahlin

Rui Fan

Jianfeng Wang

Ali Behravan

Johan Axnäs

Andreas Cedergren

Erik Bengt Dahlman

John Walter Diachina

Min Wang

David Astely

Jonas Sedin

Naga Vishnu Kanth Irukulapati

Krishna Chitti

Claes Tidestav

Nicklas Johansson

Mats Folke

Stefan Eriksson Löwenmark

Lei Bao

Gustav Almquist

Björn Hofström

Behrooz Makki

Robert Karlsson

Yanli Zheng

Wenxiang Zhao

Jinghua Ji

Qihui Wu

Athanasios Stavridis

Guohai Liu

Luca Feltrin

Qian Chen

Tahmineh Torabian Esfahani

Chunhui Zhang

Ling Su

Anqi He

Mattias BERGSTRÖM

Weizhi Zhong

Qiuming Zhu

Kai Mao

Hai Wang

Xiaomin Chen

Gaohong Xu

Xuchao Ye

Yanheng Qiu

Boyu Hua

Fuqiao Duan

Stefan Eriksson LÖWENMARK

Asbjörn GRÖVLEN

Naga Vishnu Irukulapati

Asbjorn Grovlen

Methods, an access network node and a terminal device for random access procedure are disclosed. According to an embodiment, the access network node transmits a signaling message which configures a set of physical random access channel (PRACH) occasions (ROs) associated with channel state information reference signal (CSI-RS) for two-step random access procedure.

Methods, access network node and terminal device for random access procedure

A method performed by a wireless device for determining an identity of the wireless device, MsgB RNTI, in a wireless communications network during a random access procedure is provided. The wireless device transmits a random access preamble on a RACH at a random access occasion. It also transmits a message on a PUSCH that corresponds to the random access preamble. Further, the wireless device determines an MsgB RNTI as the sum of a first identity, RA-RNTI, and an offset that is an integer greater than 1, wherein the RA-RNTI is based on a sum comprising terms corresponding to at least the index of a first OFDM symbol, the index of a frequency resource, and the index of a first time slot that identifies the time/frequency resources of the random access occasion.

Wireless device, a network node, and methods therein for determining an identity of a wireless device during a random access procedure

Methods, a base station, and a terminal device for a two-step random access procedure are disclosed. The base station transmits a first message indicating a subcarrier spacing (SCS) of a physical uplink shared channel (PUSCH) which is to be used for a second message in the two-step random access procedure, through an air interface. The SCS of the PUSCH is same as an SCS used for message 3 in a four-step random access procedure. The base station receives the second message based on the SCS of the PUSCH through the air interface in the two-step random access procedure.

Methods, base station and terminal device for two-step random access procedure

A UE is provided with a dedicated preamble for use in a two-step random access procedure, as well as dedicated, contention-free PUSCH transmission resources for the PUSCH part of msgA. In one embodiment, the base station transmits a partial PUSCH msgA configuration to the UE using dedicated RRC signaling. In another embodiment, the base station transmits a resource index to the UE indicative of a dedicated PUSCH resource for a msgA transmission via dedicated RRC signaling.

Two-step random access

Buffer Status Reports (BSR), by which the network is made aware of uplink transmission needs of wirless devices, are specifically enabled to be transmitted using 2-step Random Access (RA), to reduce latency and network resource use. In one embodiment, 2-step RA configurations tailored to BSR-transmissions are introduced. These may, for example, use a subset of the configured resources in the configured 2-step RA resources for BSR. In another embodiment, conditions for triggering BSR over 2-step RA, depending on the traffic, are introduced. For example, the priority or the the delay budget of the traffic may be used to determine whether a BSR over 2-step RA should be triggered. In another embodiment, simplified procedures when receiving the response to MsgA are introduced. These may include, for example, not transmitting a full MsgB, but rather having the UE receive an UL grant.

Efficient buffer status reporting over 2-step RA

Various embodiments of the present disclosure provide a method for random access. The method which may be performed by a terminal device comprises performing a transmission of a message to a network node in a random access procedure. The transmission of the message may comprise transmission of a preamble and transmission of a payload on a shared channel. The method further comprises receiving a response message from the network node. In response to the response message, the terminal device may perform a retransmission of the payload on the shared channel to the network node according to retransmission configuration.

Method and apparatus for random access

Various embodiments of the present disclosure provide a method for random access. The method which may be performed by a terminal device comprises performing a first transmission of a message from the terminal device to a network node in a random access procedure, according to first configuration information. The first transmission of the message comprises a transmission of a first preamble and a transmission of a payload on a shared channel. The method further comprises performing a second transmission of the message from the terminal device to the network node in the random access procedure, according to second configuration information. The second transmission of the message comprises at least one of: a transmission of a second preamble and a retransmission of the payload on the shared channel.

The present disclosure described systems and methods for providing OTT services to a UE. An exemplary OTT-providing host computer includes a transceiver, a processor, and memory collective configured to provide the OTT service by initiating transmission of user data to the UE. To transmit the user data from the host computer to the wireless device, a network node sends a first control message for assigning a PDSCH, the first control message comprising a first MCS indication as described. The network node sends to the wireless device a second control message for assigning a PDSCH, the second control message comprising a second MCS indication as described. The network node transmits the user data thereafter.

Methods and systems for performance enhancement of downlink shared channels

A system and method for providing time domain allocations in a communication system. In an embodiment, an apparatus operable in a communication system and including processing circuitry is configured to receive an indication of a time domain allocation in downlink control information associated with a radio network temporary identifier ('RNTI') identifying the apparatus, and employ the time domain allocation associated with the RNTI for transmissions associated with the apparatus. In another embodiment, an apparatus operable in a communication system and including processing circuitry is configured to associate a time domain allocation with a RNTI identifying a user equipment, and provide an indication of the time domain allocation in downlink control information to allow the user equipment to employ the time domain allocation associated with the RNTI for transmissions associated therewith.

System and method for providing time domain allocations in a communication system

Embodiments of the present disclosure provide methods, apparatus and computer program products for transmitting and receiving an uplink signal on physical control channel. A method comprises: determining that a terminal device has a capability of transmitting the uplink signal on physical control channel in at least a first time instant and a second time instant coherently; performing a first transmission of the uplink signal on physical control channel in the first time instant in a first set of subcarriers; and performing a second transmission of the uplink signal on physical control channel in the second time instant in a second set of subcarriers.

Method and apparatus for PUCCH coverage enhancement

The present disclosure provides a method in a User Equipment of transmitting a random access preamble and a physical uplink shared channel, comprising: determining a resource size to be used to contain the physical uplink shared channel, the resource size being one of a set of predetermined sizes; identifying a resource to be used from a predetermined set of resources, the resource in the set of resources corresponding to the determined resource size, each resource being identified with a respective first index n and occupying a distinct set of OFDM symbols and subcarriers; identifying a PRACH preamble with a second index n' corresponding to the first index n of the identified resource; and transmitting the identified PRACH preamble, and the physical uplink shared channel in the identified resource.

Method and apparatus for physical uplink shared channel format adaptation

Methods and apparatuses for downlink control information. A method at a network device comprises determining a format of downlink control information (DCI) used for scheduling of downlink shared channel in a 2-step random access procedure. The method further comprises determining an identifier used for scrambling cyclic redundancy check (CRC) of the format of DCI. The identifier comprises at least one of a common identifier or a specific identifier. The method further comprises transmitting information regarding a scheduled downlink shared channel with the format of DCI with the CRC scrambled by the identifier on a downlink control channel to at least one terminal device.

Method and apparatus for downlink control information

Various embodiments of the present disclosure provide a method for random access. The method which may be performed by a terminal device includes determining a random access occasion based at least in part on random access configuration information for a non-terrestrial network. The method further includes transmitting a preamble to a network node in the non-terrestrial network, according to the determined random access occasion.

A method for synchronization in a wireless system. In the method, a physical broadcast channel (PBCH) includes one or more bits, wherein the one or more bits indicate additional system information when a frequency of the wireless system is within a frequency range up to a predefined frequency and indicate a location of a slot group in a synchronization signal burst set when the frequency of the wireless system is above the predefined frequency, and wherein the slot group comprises at least one synchronization signal block and the synchronization signal burst set includes the slot group.

Method and device for synchronization

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.

Method and system for determination of synchronization signal (SS) block mapping pattern in a wireless network

Growing community of inventors

Nanjing, China

Zhipeng Lin