Lin, Pin HsunPin HsunLinSHIH-CHUN LINChen, Peng WeiPeng WeiChenMross, MarcelMarcelMrossJorswieck, Eduard A.Eduard A.Jorswieck2023-05-182023-05-182022-01-01978153868347715503607https://scholars.lib.ntu.edu.tw/handle/123456789/631133Future wireless access networks will simultaneously support a large number of devices with heterogeneous service requirements. These include data rates, error rates, and latencies. While capacity results exist for Gaussian broadcast channels in the asymptotic regime, the characterization of second-order achievable rate region for different blocklength constraints is not available. Therefore, we investigate a two-user Gaussian broadcast channel (GBC) with heterogeneous blocklength constraints, specified according to users' channel output signal to noise ratios (SNRs) under a maximal input power constraint and an average error probability constraint. We show that with sufficiently large output SNR, the stronger user can invoke the technique named early decoding (ED) to decode the interference. Then the successive interference cancellation (SIC) is performed. We derive the rate region of the considered setting with individual and also sum power constraints and compare with the hybrid non-orthogonal multiple access (HNOMA) scheme. Numerical results show that under sum power constraint, ED has a larger rate region than HNOMA at the region where the weaker user's rate is sufficiently large, when the gain of the better channel is sufficiently larger than the weaker one. The above observation makes ED with SIC a promising technique for future wireless networks.conference paper10.1109/ICC45855.2022.98383922-s2.0-85134511964https://api.elsevier.com/content/abstract/scopus_id/85134511964