Non-Orthogonal Contention-Based Access for URLLC Devices with Frequency Diversity

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussavertaisarvioitu

Tutkijat

Organisaatiot

  • Aalborg University

Kuvaus

We study coded multichannel random access schemes for ultra-reliable low-latency uplink transmissions. We concentrate on non-orthogonal access in the frequency domain, where users transmit over multiple orthogonal subchannels and inter-user collisions limit the available diversity. Two different models for contention-based random access over Rayleigh fading resources are investigated. First, a collision model is considered, in which the packet is replicated onto K available resources, K' ≤ K of which are received without collision, and treated as diversity branches by a maximum-ratio combining (MRC) receiver. The resulting diversity degree K' depends on the arrival process and coding strategy. In the second model, the slots subject to collisions are also used for MRC, such that the number of diversity branches K is constant, but the resulting combined signal is affected by multiple access interference. In both models, the performance of random and deterministic repetition coding is compared. The results show that the deterministic coding approach can lead to a significantly superior performance when the arrival rate of the intermittent URLLC transmissions is low.

Yksityiskohdat

AlkuperäiskieliEnglanti
Otsikko2019 IEEE 20th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2019
TilaJulkaistu - 1 heinäkuuta 2019
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaIEEE International Workshop on Signal Processing Advances in Wireless Communications - Cannes, Ranska
Kesto: 2 heinäkuuta 20195 heinäkuuta 2019
Konferenssinumero: 20

Julkaisusarja

NimiIEEE International Workshop on Signal Processing Advances in Wireless Communications
ISSN (painettu)2325-3789
ISSN (elektroninen)1948-3252

Workshop

WorkshopIEEE International Workshop on Signal Processing Advances in Wireless Communications
LyhennettäSPAWC
MaaRanska
KaupunkiCannes
Ajanjakso02/07/201905/07/2019

ID: 37223555