Block-Wise Resource Block-Level Distributed Transmission for Shared Data Channel in OFDMA Evolved UTRA Downlink
| Autor: | Satoshi Nagata, Yoshiaki Ofuji, Mamoru Sawahashi, Kenichi Higuchi, Yoshihisa Kishiyama, Nobuhiko Miki |
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| Rok vydání: | 2009 |
| Předmět: |
Frequency-division multiple access
Computer Networks and Communications business.industry Orthogonal frequency-division multiplexing Computer science Code rate Multiplexing Subcarrier Transmission (telecommunications) Telecommunications link Resource allocation Electrical and Electronic Engineering business Telecommunications Software Decoding methods Data transmission Block (data storage) Diversity scheme Computer network Communication channel |
| Zdroj: | IEICE Transactions on Communications. :1660-1668 |
| ISSN: | 1745-1345 0916-8516 |
| Popis: | This paper proposes block-wise resource block (RB)-level distributed OFDMA transmission with ND-block division in order to obtain the frequency diversity effect even for low-rate traffic (here ND 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 ND blocks with the size of 1/ND of the original virtual RB. Then, the ND virtual blocks with the size of 1/ND are mapped together into each ND 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). |
| Databáze: | OpenAIRE |
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