Bandwidth sharing for relaying in cellular systems

Narayanan Krishnan, Roy D. Yates, Narayan B. Mandayam, Jignesh S. Panchal

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


We investigate bandwidth allocation in next generation cellular systems employing relays similar to LTE advanced systems with type-I relays. We jointly optimize the bandwidth and power usage under constraints on required rate, bandwidth and transmit power. We study scenarios wherein, the relay acts as a forwarder for multiple User Equipments (UEs/users) in both uplink and/or downlink. This includes scenarios when the relay has its own data to send along with forwarding the data of other users. We examine the weighted power minimization problem for relaying with multiple users. We also show specific results with N user scenario and also single user case in order to understand how the bandwidth and power are allocated. Numerical evaluations with N users on a three sector LTE-A cell employing Fractional Frequency Reuse (FFR) indicate that power savings of at least 3 dB can be achieved by optimizing over both bandwidth and power.

Original languageEnglish (US)
Article number6087250
Pages (from-to)117-129
Number of pages13
JournalIEEE Transactions on Wireless Communications
Issue number1
StatePublished - Jan 2012

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


  • Bandwidth allocation
  • convex optimization
  • coverage extension
  • multihop cellular system
  • power minimization
  • resource management
  • time sharing


Dive into the research topics of 'Bandwidth sharing for relaying in cellular systems'. Together they form a unique fingerprint.

Cite this