| Presentation | 2019-11-20 Resource control by CCA time control based on carrier sense in LTE-LAA Kenshiro Wada, Tomoaki Ohtsuki, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | As a means of high-speed and large-capacity communication, broadbandization of LTE communication is considered. However, in addition to the currently used license band, to use the unlicensed band, interference control with Wi-Fi that also uses the unlicensed band is required. A technique called LBT (Listen Before Talk) is considered as a technique of LTE-LAA (LTE-Licensed Assisted Access) interference control. However, there is a problem that access to Wi-Fi channels is hindered by LTE-LAA channel occupancy. As a solution to this, we consider controlling the time width of carrier sense in LBT. In LBT, LTE-LAA BS (base station) performs carrier sense prior to transmission, and confirms whether channel is used during sensing. If the channel is used by Wi-Fi, LTE-LAA BS waits for transmission. Therefore, if the carrier sense duration is long, Wi-Fi transmission is prior to LTE-LAA, and if it is short, LTE-LAA transmission is prior to Wi-Fi. In this report, we propose to control the LTE-LAA carrier sense duration to control the resources between LTE-LAA and Wi-Fi. In the proposed method, we control the channel access duration of Wi-Fi to control the CCA duration. By carrier sensing, LTE-LAA gets the channel busy duration when Wi-Fi is accessing the channel. When sum of busy duration is greater than the threshold B, LTE-LAA BS increases the carrier sense duration, and the LTE-LAA transmission priority is increased. When sum of busy duration is less than B, LTE-LAA BS increases the carriersense duration, and the Wi-Fi transmission priority is increased. Through computer simulation, we confirms that B is set large, Wi-Fi throughput becomes high, and when B is set small, the LTE-LAA throughput becomes high. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LTE-LAA / Wi-Fi / Listen-Before-Talk / CCA |
| Paper # | RCS2019-203 |
| Date of Issue | 2019-11-13 (RCS) |
| Conference Information | |
| Committee | AP / RCS |
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| Conference Date | 2019/11/20(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Saga Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Adaptive Antenna, Equalization, Interference Canceler, MIMO, Wireless Communications, etc. |
| Chair | Qiang Chen(Tohoku Univ.) / Tomoaki Otsuki(Keio Univ.) |
| Vice Chair | Satoru Kurokawa(AIST) / Satoshi Suyama(NTT DoCoMo) / Fumiaki Maehara(Waseda Univ.) / Toshihiko Nishimura(Hokkaido Univ.) |
| Secretary | Satoru Kurokawa(Mitsubishi Electric) / Satoshi Suyama(Tokyo Univ. of Agric. & Tech.) / Fumiaki Maehara(NTT) / Toshihiko Nishimura(Kyushu Univ.) |
| Assistant | Michitaka Ameya(AIST) / Kazushi Muraoka(NEC) / Shinsuke Ibi(Doshisha Univ.) / Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) |
| Paper Information | |
| Registration To | Technical Committee on Antennas and Propagation / Technical Committee on Radio Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Resource control by CCA time control based on carrier sense in LTE-LAA |
| Sub Title (in English) | |
| Keyword(1) | LTE-LAA |
| Keyword(2) | Wi-Fi |
| Keyword(3) | Listen-Before-Talk |
| Keyword(4) | CCA |
| 1st Author's Name | Kenshiro Wada |
| 1st Author's Affiliation | Keio University(Keio Univ.) |
| 2nd Author's Name | Tomoaki Ohtsuki |
| 2nd Author's Affiliation | Keio University(Keio Univ.) |
| Date | 2019-11-20 |
| Paper # | RCS2019-203 |
| Volume (vol) | vol.119 |
| Number (no) | RCS-296 |
| Page | pp.pp.1-6(RCS), |
| #Pages | 6 |
| Date of Issue | 2019-11-13 (RCS) |