Telefonaktiebolaget Lm Ericsson (publ)

Krishna Chitti

Andres Reial

Robert Mark Harrison

Zhipeng Lin

Robert Baldemair

Johan Rune

Ali Behravan

Athanasios Stavridis

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

A method of a communication device configured with two or more multi-user coordination modes for communication with a plurality of users is disclosed. The method comprises determining an available spatial selectivity for the plurality of users, and selecting one of the two or more multi-user coordination modes based on the determined available spatial selectivity and a number of users of the plurality. Corresponding apparatus, communication receiver and computer program product are also disclosed.

Multi-user coordination

The present disclosure relates to a method for a terminal device to determine demodulation reference signal (DMRS), comprising: obtaining () a DMRS configuration and a corresponding signature assigned by a network side node; constructing () a DMRS according to the DMRS configuration; mapping () the DMRS to a physical channel assigned to the terminal device. The signature indicates a processing configuration for the physical channel. In the embodiments of the present disclosure, the signature, and DMRS configuration may be configured correspondingly, to obtain low-crosstalk DMRS signals for different terminal devices, thus, the number of the supported terminal devices may be improved.

Method for determining demodulation reference signal for multiple access transmission

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Lund, Sweden

Krishna Chitti