Block-Wise Resource Block-Level Distributed Transmission for Shared Data Channel in OFDMA Evolved UTRA Downlink

• NAGATA Satoshi

  Radio Access Network Development Department, NTT DOCOMO, INC.

• OFUJI Yoshiaki

  Radio Access Network Development Department, NTT DOCOMO, INC.

• KISHIYAMA Yoshihisa

  Radio Access Network Development Department, NTT DOCOMO, INC.

• MIKI Nobuhiko

  Radio Access Network Development Department, NTT DOCOMO, INC.

• HIGUCHI Kenichi

  Department of Electrical Engineering, Tokyo University of Science

• SAWAHASHI Mamoru

  Department of Information Network Engineering, Musashi Institute of Technology

抄録

This paper proposes block-wise resource block (RB)-level distributed OFDMA transmission with N_D-block division in order to obtain the frequency diversity effect even for low-rate traffic (here N_D indicates the number of virtual RBs within one physical RB) in Evolved UTRA downlink. More specifically, we propose a constraint rule such that distributed transmission is multiplexed into a different physical RB from that of localized transmission in order to achieve the same resource assignment and independent decoding between the distributed and localized transmissions. Based on the proposed rule, a virtual RB for distributed transmission is segmented into N_D blocks with the size of 1/N_D of the original virtual RB. Then, the N_D virtual blocks with the size of 1/N_D are mapped together into each N_D physical RB in a distributed manner, resulting in a large frequency diversity effect. Numerical calculations show that the block-wise RB-level distributed transmission can reduce the number of control signaling bits required for resource assignment compared to the subcarrier-level distributed transmission scheme, which provides the best performance. Moreover, a system-level simulation shows that the loss in the cell throughput employing the block-wise RB-level distributed transmission compared to that using the subcarrier-level transmission is only within 3-4% when the channel load is 0.5 and 1.0, i.e., the maximum loss is 3-4% at approximately 90% in the cumulative distribution function (CDF).

収録刊行物

• IEICE Transactions on Communications

  IEICE Transactions on Communications E92-B (5), 1660-1668, 2009

  一般社団法人 電子情報通信学会

キーワード

• Evolved UTRA
• OFDM
• distributed transmission
• resource block
• shared data channel

詳細情報

• CRID: 1390282679349706240
• NII論文ID: 10026838090
• NII書誌ID: AA10826261
• DOI: 10.1587/transcom.e92.b.1660
• ISSN: 17451345
• ISSN: 09168516
• Web Site: http://www.jstage.jst.go.jp/article/transcom/E92.B/5/E92.B_5_1660/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可