Nokia Technologies Oy

Sudeep Hegde

Vinh Van Phan

Ling Yu

Lianghai Ji

Faranaz Sabouri-Sichani

Jedrzej Stanczak

Hajo Bakker

Berthold Panzner

Jakob Lindbjerg Buthler

Oliver Blume

Prajwal Keshavamurthy

Faranaz Sabouri-Sichan

György Tamas Wolfner

An arrangement for role management in relay communication is disclosed. In relay communication, one user equipment relays communication between a base station and at least one remote user equipment. Initially, the relay user equipment has a better signal to a base station. When the signal changes, a better signal channel may be achieved by switching roles between a relay user equipment and a remote user equipment. This includes detecting that a better signal exists and determining that a change would provide a better signal.

Role management in relay communication

An ARQ system for sidelink communication between transmitter and receiver, with the help of cooperative UE, or relay UE is disclosed. The relay intercepts the initial transmission from transmitter to receiver. If the relay does not intercept any ARQ feedback from the receiver (DTX), it retransmits the initial transmission. Upon receiving at least the Sidelink Control Information, SCI, identifying the retransmission, the transmitter terminates the HARQ process, assuming that the relay is now in charge of the retransmission. Upon reception of the retransmission, the receiver feeds back an HARQ ACK to the relay and the transmitter. If the receiver correctly receives the initial transmission, it feeds back an HARQ ACK to the relay and the transmitter and both relay and transmitter stop the HARQ process. If the relay does not successfully receive the initial transmission, it feds back a NACK to the transmitter which performs retransmission to the relay.

SL data transmission for unicast sidelink between user equipments

A system and method for establishing a unicast sidelink communication channel between a source user equipment (UE) and a target UE via a relay UE is described. The source UE sends a relay request message to a potential relay UE. The message includes information to configure a sidelink Hybrid Automatic Repeat Request (HARQ) process with feedback enabled. The information also indicates no transport block for HARQ transmissions to the target UE and enables the relay UE to send a sidelink unicast message to the target UE using the source UE's identifier. The relay UE sends a sidelink message without a transport block to the target UE using the configured common HARQ process and resources and subsequently sends a response message to the source UE indicating an outcome of the HARQ process.

Terminal node to terminal node communication

For a UE in a wireless network and able to communicate via sidelink communications with other UE(s), the UE determines whether a specific condition exists indicating the UE has limited availability of CG resources used to communicate for the sidelink communications. The UE sends, using the sidelink communications, a message indicating the limited availability of the CG resources toward the other UE(s). Another UE receives the message indicating a limited availability of CG resources for the UE, and prepares an application in the other UE for a less sensitive mode of operation having less QoS than a mode having a normal QoS. A base station can configure the UE with the CG resources and provide a set of parameters to the UE to be used to form the message for the user equipment to transmit to the other UE(s) using sidelink communications.

Sidelink advanced notification

Growing community of inventors

Stuttgart, Germany

Sudeep Hegde