| Presentation | 2008-10-24 A study on reducing traffic in uplink downlink asymmetric cellular relay method Akihiro Setoyanagi, Takeo Fujii, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A relay station is effective device to set in the indoor to achieve the stable communication quality on the environment where direct signal strength is weak. The use of the relay station is also effective to reduce the load of the amplifier on the terminal when the cellular system uses uplink OFDM like WiMAX In such case, the relay has an advantage to reduce the transmit power of the uplink even if a direct signal is reached to the mobile station from base station in the downlink. However the downlink communication increases the redundant relay packets due to the useless packet generation in the downlink. Therefore, in this research, we propose an asymmetryy relay method of the uplink downlink. This method requests a retransmission of errored downlink signals to the relay station only when a packet error occurs in a mobile station. Furthermore, we introduce a novel relay method using punctured convolutional code to reduce the traffic reduction by retransmitting only a punctured bit from a relay station at the time of a retransmission. In addition, we propose a method which controls the encoding rate by a communication status between the base station and the relay station, and base station and the mobile station adaptively. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Uplink downlink asymmetric / Relay / Adaptive coding rate / Punctured convolutional code |
| Paper # | RCS2008-127 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2008/10/15(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A study on reducing traffic in uplink downlink asymmetric cellular relay method |
| Sub Title (in English) | |
| Keyword(1) | Uplink downlink asymmetric |
| Keyword(2) | Relay |
| Keyword(3) | Adaptive coding rate |
| Keyword(4) | Punctured convolutional code |
| 1st Author's Name | Akihiro Setoyanagi |
| 1st Author's Affiliation | Advanced Wireless Communication research Center, The University of Electro-Communications() |
| 2nd Author's Name | Takeo Fujii |
| 2nd Author's Affiliation | Advanced Wireless Communication research Center, The University of Electro-Communications |
| Date | 2008-10-24 |
| Paper # | RCS2008-127 |
| Volume (vol) | vol.108 |
| Number (no) | 249 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |