Queue-architecture and stability analysis in cooperative relay networks

Jubin Jose, Sriram Vishwanath, Lei Ying

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


An abstraction of the physical-layer coding using bit pipes that are coupled through data-rates is insufficient to capture notions such as node cooperation in cooperative relay networks. Consequently, network-stability analyses based on such abstractions are valid for non-cooperative schemes alone and meaningless for cooperative schemes. Motivated from this, this paper develops a framework that brings the information-theoretic coding scheme together with network-stability analysis. This framework does not constrain the system to any particular achievable scheme, i.e., the relays can use any cooperative coding strategy of its choice such as amplify/compress/quantize or any alter-and-forward scheme. The paper focuses on the scenario when coherence duration is of the same order of the packet/codeword duration, the channel distribution is unknown and the fading state is only known causally. The main contributions of this paper are two-fold: first, it develops a low-complexity queue-architecture to enable stable operation of cooperative relay networks, and, second, it establishes the throughput optimality of a simple network algorithm that utilizes this queue-architecture.

Original languageEnglish (US)
Article number6311234
Pages (from-to)1754-1761
Number of pages8
JournalIEEE Journal on Selected Areas in Communications
Issue number9
StatePublished - 2012


  • Cooperative queue-architecture
  • Stability analysis
  • Throughput-optimal algorithm

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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