Telefonaktiebolaget Lm Ericsson (publ)

Jan Christoffersson

Min Wang

Mårten Ericson

Jinhua Liu

Mats Folke

Henrik Enbuske

Johan Rune

Robert Mark Harrison

Henrik Sahlin

Zhipeng Lin

Robert Baldemair

Stefan Parkvall

Icaro L J Da Silva

Andres Reial

Janne Peisa

Zhang Zhang

Marco Belleschi

Jose Luis Pradas

Johan Axnäs

Tommy Arngren

Muhammad Ali Kazmi

Iana Siomina

Erik G Larsson

Arne Simonsson

Stefan Wänstedt

Paul Schliwa-Bertling

Havish Koorapaty

Yi-Pin Eric Wang

Rui Fan

Stephen J Grant

Qingyu Miao

Andreas Höglund

Tuomas Tirronen

Hans Hannu

Björn Hofström

Gunnar Bergquist

Jonas Sedin

Marten Ericson

Krister Svanbro

Jonas Fröberg Olsson

Niklas Johansson

Peter Alriksson

Reem Karaki

Peter Ökvist

Per Skillermark

Asbjörn Grövlen

Svante Bergman

Guido Roland Hiertz

Vincent Huang

Edgar Ramos

Mai-Anh Phan

Waikwok Kwong

Magnus Thurfjell

Kjell Larsson

Sara Landström

Robert Karlsson

Tomas Jönsson

Tai Do

Shunliang Zhang

Xuejun Cai

Majid Gerami

Mats Blomgren

Victor Farias Monteiro

Luca Feltrin

Bikramjit Singh

Narendar Madhavan

Andreas Hoglund

Yazid Lyazidi

Márten Ericson

David Henrikssson

Màrten Ericson

Liwei Qiu

David Henriksson

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

The present disclosure relates to telecommunications. In one of its aspects, the disclosure concerns a method in a source User Equipment (UE) for group transmissions in a wireless communications system comprising a group of UEs, including the source UE. The group is assigned a first group IDentity (ID). The source UE has data to be cooperatively transmitted by the group of UEs in a group transmission to a Radio Access Network (RAN) node. The method comprises transmitting, to the group of UEs, a SideLink (SL) message. The SL message comprises the data to be transmitted to the RAN node, a source UE ID identifying the source UE, the first group ID identifying the group of UEs receiving the data and an indicator indicating that the data comprised in the SL message is to be transmitted cooperatively by the group of UEs in a group transmission to the RAN node.

Apparatuses and methods for 2-hop cooperative group transmissions

A wireless device is configured for use in a wireless communication network. The wireless device obtains a configuration that governs how the wireless device is to monitor for and/or attempt to recover from consistent uplink listen-before-talk (LBT) failure that occurs during a mobility procedure triggered by the wireless device. According to the obtained configuration, the wireless device monitors for and/or attempts to recover from consistent uplink LBT failure occurring during the mobility procedure.

Listen-before-talk failure in a wireless communication network

Techniques are provided to enable use of more than two preamble group Bs during random access (RA) for connected UEs. This flexibility is achieved by configuring the active BWP to overlap with the 2-step RA resources on the initial BWP, configuring different sizes of preamble group B in the initial BWP and the active BWP, a allowing connected UEs in the active BWP to use the MsgA PRACH and MsgA PUSCH resources in the initial BWP without switching active BWP.

Random access resource configuration in different bandwidth parts for two-step random access

Method and device(s) for supporting charging relating to a group transmission in a wireless communication network, said group transmission involving a group of wireless devices configured to, via one or more direct communication links between each other, participate in data transmission between a source wireless device and the wireless communication network. Data is transmitted on a device specific group bearer in a core network of the wireless communication network, which second data relates to the group transmission and to a wireless device of the group. Said device specific group bearer being configured specifically for data transmission usage relating to the wireless device when the data transmission is part of the group transmission.

Method and arrangements relating to group transmission in a wireless communication network

A method performed in a User Equipment (UE) is disclosed, the UE being operable to connect to a communication network. The method includes transmitting a path request message requesting a path for transmission of data to the communication network, the path request message including an identifier of the UE, and receiving at least one path message including an ordered list of identifiers of mobile nodes and of a base station node of the communication network that form a path for transmission of data from the UE to the communication network. The method further includes selecting a path from the received at least one path message and transmitting data to the first mobile node in the selected path. Also disclosed are a method performed by a mobile node such as an Unmanned Aerial Vehicle (UAV), a UE, a mobile node and computer program product.

Communication with a network via mobile nodes

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 apparatus are provided for selecting a next hop for a data packet. In one aspect, a method in a first node of selecting a next hop for a data packet includes determining a volume that is at least partially located between a first communication device and a destination node of the data packet, determining at least one moveable communication device located within the volume, and selecting one of the at least one moveable communication device as a next hop for the data packet after the first communication device.

Selecting a next hop for a data packet

The present disclosure relates to a method performed by a UE () for handling 2-step and 4-step RA procedures in a communications system (). The UE () transmits a msgA comprising a preamble and a msg3 to a network node (). The UE () applies a 2-step RA procedure when transmitting msgA. Based on a criterion, the UE () determines to fallback from the 2-step RA procedure to a 4-step RA, procedure. The criterion is that a maximum number of msgA transmissions has been exceeded or receipt of an indicator indicating that the UE () should fallback from the 2-step RA procedure to the 4-step RA procedure.

UE, network node and methods for handling 2-step and 4-step random access procedures

A wireless device configured to perform a 2-step random access, RA, procedure transmits () a message according to the 2-step RA procedure, the message comprising a first random access preamble. The wireless device receives (), during a RA response window following the transmitting of the message, a Medium Access Control, MAC, subheader. Using one or more bits or fields included in the received subheader, the wireless device determines () that it should take action according to any one of the following: backing off, according to a back-off parameter, for a subsequent RA attempt according to the 2-step RA procedure; falling back to a 4-step RA procedure by transmitting a new RA preamble; and falling back to a 4-step RA procedure after backing off according to a back-off parameter, by transmitting a new random access preamble after the back-off.

Back-off for 2-step RA procedure

The invention relates to a method in a user equipment, UE, for performing handover to a target cell in a wireless network, the method comprising performing () a first random-access, RA, procedure in first RA resources of the target cell, in response to failure of the first RA procedure, refraining () from declaring a radio link failure, RLF, for the target cell and performing a second RA procedure in second RA resources of the target cell that are different from the first RA resources; and declaring () a RLF for the target cell based on failure of the first RA procedure and a failure of the second RA procedure, or an expiration of a timer before successful completion of the second RA procedure; the invention further relates to a UE implementing the method, to a corresponding method in a network node and a network node implementing the method.

Handling of uplink listen-before-talk failures for handover

A method in a UE comprises: receiving a message from a network node comprising information about one or more sets of dedicated random access channel (RACH) resources, each set of dedicated RACH resources associated with a beam associated with a target cell; obtaining an estimate of beam quality for each beam associated with the sets of dedicated RACH resources; determining, based on the obtained estimate of beam quality, whether any beam associated with the one or more sets of dedicated RACH resources meets one or more criteria of a first set of criteria for performing random access; and performing random access based on whether any beam associated with the one or more sets of dedicated RACH resources meets the one or more criteria of the first set of criteria for performing random access.

Multi-beam random access procedure in handover execution

Embodiments of the present disclosure provide methods and apparatuses for random access procedure. A method at a user equipment (UE) comprises selecting a synchronization signal and physical broadcast channel block (SSB) with a signal measured metric satisfying a criterion. The method further comprises transmitting a first message including a random access channel (RACH) preamble on a RACH occasion and data on an uplink shared channel (USCH) to a base station. The RACH preamble and the RACH occasion are selected based on a mapping of the SSB to the RACH preamble and the RACH occasion. The method further comprises receiving a second message from the base station as a response to the first message.

Method and apparatus for random access procedure

A wireless device is configured to receive information from a network node. The information indicates whether or not a medium access control, MAC, service data unit, SDU, for a signaling radio bearer, SRB, or data radio bearer, DRB, is to be received by the wireless device in the same MAC protocol data unit, PDU, as a MAC PDU carrying a random access success response message. This random access success response message indicates both a random access channel and an uplink shared channel payload were decoded successfully. In some embodiments, the wireless device is configured to receive a MAC PDU carrying the random access success response message, and to process the received MAC PDU based on the received information indicating whether a MAC SDU for an SRB or DRB is included in the received MAC PDU.

Configuration of a random access procedure

The present disclosure relates to radio network communication. In one of its aspects, the disclosure presented herein concerns a method performed by a first UE for transmitting group Buffer Status Reports (BSRs) for group transmissions to a Base Station (BS) in a wireless communication system. The wireless communication system comprises the BS and a plurality of UEs, including the first UE. The plurality of UEs are assigned to a group, wherein at least one of the UEs within the assigned group has data for group transmission to the BS. The method comprises transmitting, to the BS, a group BSR. The group BSR comprises at least one identifier identifying a request for SideLink (SL) transmissions within the assigned group and identifying a request for cooperative UpLink (UL) group transmissions of data by the UEs within the assigned group to the BS once the SL transmissions to the UEs within the assigned group are completed.

Apparatuses and methods for using group buffer status reports

Growing community of inventors

Luleå, Sweden

Jan Christoffersson