Simple Semi-Grant-Free Transmission Strategies Assisted by Non-Orthogonal Multiple Access

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autorinnen und Autoren: Ding Z, Schober R, Fan P, Poor HV
Zeitschrift: IEEE Transactions on Communications
Jahr der Veröffentlichung: 2019
Band: 67
Heftnummer: 6
Seitenbereich: 4467-4478
ISSN: 0090-6778
Sprache: Englisch


Grant-free transmission is an important feature to be supported by future wireless networks since it reduces the signaling overhead caused by conventional grant-based schemes. However, for grant-free transmission, the number of users admitted to the same channel is not capped, which can lead to a failure of multi-user detection. This paper proposes non-orthogonal multiple-access (NOMA) assisted semi-grant-free (SGF) transmission, which is a compromise between grant-free and grant-based schemes. In particular, instead of reserving channels either for grant-based users or grant-free users, the focus here is on an SGF communication scenario, where users are admitted to the same channel via a combination of grant-based and grant-free protocols. As a result, a channel reserved by a grant-based user can be shared by grant-free users, which improves both connectivity and spectral efficiency. Two NOMA assisted SGF contention control mechanisms are developed to ensure that, with a small amount of signaling overhead, the number of admitted grant-free users is carefully controlled and the interference from the grant-free users to the grant-based users is effectively suppressed. Analytical results are provided to demonstrate that the two proposed SGF mechanisms employing different successive interference cancelation decoding orders are applicable to different practical network scenarios.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Schober, Robert Prof. Dr.-Ing.
Lehrstuhl für Digitale Übertragung

Einrichtungen weiterer Autorinnen und Autoren

Princeton University
Southwest Jiaotong University / 西南交通大学
University of Manchester


Ding, Z., Schober, R., Fan, P., & Poor, H.V. (2019). Simple Semi-Grant-Free Transmission Strategies Assisted by Non-Orthogonal Multiple Access. IEEE Transactions on Communications, 67(6), 4467-4478.

Ding, Zhiguo, et al. "Simple Semi-Grant-Free Transmission Strategies Assisted by Non-Orthogonal Multiple Access." IEEE Transactions on Communications 67.6 (2019): 4467-4478.


Zuletzt aktualisiert 2019-11-08 um 11:53