Tutorial outline 1 (YP) Why rethink MAC today? 2 (YP) Review of classical results on MAC 3 (YP) New UMAC model. IT bounds 4 (KN) Why standard solutions do not work for UMAC 5 (JFC) UMAC codes from Compressed Sensing 6 (KN) UMAC codes from MAC codes J.-F. Chamberland, K. Narayanan, and Y. Polyanskiy UMAC Part I: Information Theory 2

unsourced multiple access (UMAC) protocols. We first provide a historical survey of the evolution of random access protocols, focusing specifically on the case in which uncoordinated users share a wireless broadcasting medium. Next, we highlight the change of perspective originated by the UMAC model, in which

2024年8月12日 · As an example, we discuss a simple modification to the 5G New Radio (5GNR) Release 16 random access channel that builds on the UMAC theory and that dramatically improves energy efficiency for systems with even moderate number of simultaneous users (e.g., 5–10-dB gain for 10–50 users) and also enables handling of high number of users ...

The concept of unsourced multiple access (UMAC) has been developed toward the massive access scenario in future wireless communications. Recently, a basic framework of UMAC has been proposed where every message is encoded by polar codes.

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We describe a message authentication algorithm, UMAC, which authenticates messages (in software, on contemporary machines) roughly an order of magnitude faster than current practice (e.g., HMAC-SHA1), and about twice as fast as previously reported times for the universal hash-function family MMH.

We provide throughput rates, measured in machine cycles-per-byte, for the processing of messages of various byte-lengths by UMAC and its underlying hash function UHASH. We use cycles-per-byte because it makes possible efficiency comparisons between processors running at different speeds.

2021年8月17日 · This demand for a redesign of the medium access layer, prompted an exciting set of new information-theoretic and coding-theoretic problems, named unsourced/uncoordinated multiple access (UMAC). Correspondingly, in this tutorial, we discuss both the fundamental characterizations and pragmatic algorithms.

We describe a message authentication algorithm, UMAC, which can authenticate messages (in software, on contemporary machines) roughly an order of magnitude faster than current practice (e.g., HMAC-SHA1), and about twice as fast as times previously reported for the universal hash-function family MMH.

Abstract: This specification describes how to generate an authentication tag using the UMAC message authentication algorithm. UMAC is designed to be very fast to compute in software on contemporary uniprocessors. Measured speeds are as low as one cycle per byte.