The problem of multicasting multiple messages with the help of a relay, which may also have an independent message of its own to multicast, is considered. As a first step to address this general model, referred to as the compound multiple access channel with a relay (cMACr), the capacity region of the multiple access channel with a "cognitive" relay is characterized, including the cases of partial and rate-limited cognition. Achievable rate regions for the cMACr model are then presented based on decode-and-forward (DF) and compress-andforward (CF) relaying strategies. Moreover, an outer bound is derived for the special case in which each transmitter has a direct link to one of the receivers while the connection to the other receiver is enabled only through the relay terminal. Numerical results for the Gaussian channel are also provided. © 2009 IEEE.
Relaying simultaneous multicast messages / Gunduz, D.; Simeone, O.; Goldsmith, A.; Poor, H. V.; Shamai, S.. - (2009), pp. 47-51. (Intervento presentato al convegno 2009 IEEE Information Theory Workshop on Networking and Information Theory, ITW 2009 tenutosi a Volos, grc nel 2009) [10.1109/ITWNIT.2009.5158539].
Relaying simultaneous multicast messages
Gunduz D.;
2009
Abstract
The problem of multicasting multiple messages with the help of a relay, which may also have an independent message of its own to multicast, is considered. As a first step to address this general model, referred to as the compound multiple access channel with a relay (cMACr), the capacity region of the multiple access channel with a "cognitive" relay is characterized, including the cases of partial and rate-limited cognition. Achievable rate regions for the cMACr model are then presented based on decode-and-forward (DF) and compress-andforward (CF) relaying strategies. Moreover, an outer bound is derived for the special case in which each transmitter has a direct link to one of the receivers while the connection to the other receiver is enabled only through the relay terminal. Numerical results for the Gaussian channel are also provided. © 2009 IEEE.
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