ローカル5GのTDDについて
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�同期・非同期とは 同期 無線フレーム開始タイミング 及び 上下リンク通信パターンが一致 非同期 DD同期TDDTime無線フレーム（10 msec）TDD1DDDDDDD S UUDDDDDDD S UUTDD2DDDDDDD S UUDDDDDDD S UU �誤差は 基地局間で /-1.5us 以内）かつ 上下リンク通信パターンが一致D: 下りスロット、U: 上りスロット、S: トTimeTDD1 D D D D D D D S U U D D D D D D D S U UTDD2DDDDDDD S UUDDDDDDD S UU �、またはTimeTDD1 D D D D D D D S U U D D D D D D D S U UTDD2 D D S U U S D U D S D U D S D U D S D U 上下リンク通信パターンが不一致2
��生じない D1DDDDDDD S UUDDDDDDD S UUTDD2DDDDDDD S UUDDDDDDD S ピリオド（GP）で吸収）3
��が生じうる区間ができる �渉が発生し得る �期TDDTimeTDD1 D D D D D D D S U U D D D D D D D S U 局間干渉基地局1D基地局2DDDDDDD S UUDDDDDDD S 干渉発生し得る区間TDD1 D D D D D D D S U U D D D D D D D S U U端末1TDD2 D S U U D D D S U U D S U U D D D S U ��干渉4
�基地局間干渉と移動局間干渉の違い 基地局間干渉 ��ア形成） 端末間干渉 �能性 �的に確率的となる隣接エリア間 ��）隣接周波数重複エリア間5
��干渉の抑圧方法 ��数的に離す ける 離隔距離を設定する 信電力を制限するTDDFreq 非同一周波数の場合のみ有効 設置制約が発生 設置制約が発生 GBの分だけ周波数効率は劣化 面的カバーが困難 �とされてきた6
��を決定する いTDDパターンが異なる可能性が高い �ートフォン �工場自動化 ��事業者（屋内）屋内スタジアム �など 上り速度重視全国5Gローカル5G周波数7
� 用を許容できる制度とすべき ��とが重要 ��望ましい �最小化するため、下記が有効： ��一致となるパターンを規定 5678910 11 12 13 14 15 16 17 18 ップ遅延パターン1約 3.5Gbps約 0.54Gbps3ms3msパターン2約 2.5Gbps約 ��り4レイヤ) �例8
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LTE TDD is truly global—many combining FDD and TDD Source: www.gsacom.com, Networks in deployment/planning as of April, 2014, Commercial launches as of Jul 2014 79 TDD Networks commitments 39 Commercial launches 26 Countries 13 Combined TDD and FDD LTE TDD investments worldwide Commercial deployments Trials, studies, deployments
system difficult. The code division multiple access system with time division duplex mode (TDD-CDMA) is a promising solution to cope with the traffic asymmetry problem [1, 2]. The TDD-CDMA mode of 3GPP, named UTRA-TDD (Also called UMTS-TDD), is based on TD-CDMA technology, which is a mixture of TDMA and CDMA [3]. In Frequency Division Duplex
FDD and TDD mode are on the physical layer, in particular, the frame structure. The differences in higher layers are very few. Table 1. Physical layer comparisons of LTE FDD and LTE TDD LTE FDD LTE TDD Radio access mode FDD TDD Radio frame length 10 ms (20 slots, 10 sub-frames) 10 ms (20 slots, 10 sub-frames)
37 1910 MHz - 1930 MHz TDD 38 2570 MHz - 2620 MHz TDD 39 1880 MHz - 1920 MHz TDD 40 2300 MHz - 2400 MHz TDD TDD Frequency Band FDD Frequency Band From LTE Protocol: Support frequency band form 700MHz to 2.6GHz Support various bandwidth: 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz
UMTS FDD (W-CDMA) UMTS Release 4 (2001) Separation of user data flows and control mechanisms, UMTS TDD Time Division CDMA (TD-CDMA), zHigh data rate with UMTS TDD 3 84 Mchips /s z High data rate with UMTS TDD 3. 84, z Narrowband TDD with 1.28 Mchips/s, Position location functionality. Mobile Communication Wireles
UMTS FDD (W-CDMA) UMTS Release 4 (2001) Separation of user data flows and control mechanisms, UMTS TDD Time Division CDMA (TD-CDMA), zHigh data rate with UMTS TDD 3 84 Mchips /s z High data rate with UMTS TDD 3. 84, z Narrowband TDD with 1.28 Mchips/s, Position location functionality. Mobile Communication Wireless Telecommunication 90
LTE FDD AND TDD All specifications are defined when used in conjunction with the 3030 Series PXI RF digitizer with option 107 (FDD) and option 108 (TDD) operating in all E-UTRA FDD and TDD bands. Test sequencing with PXI Maestro additionally requires option 207. Measurements performed are in accordance with 3GPP 36.521-1 section 6.
Pedoman Tatalaksana Hipertensi pada Penyakit Kardiovaskular Faktor risiko, kerusakan target oran yang asimomatik atau penyakit Tekanan darah (mmHg) Normal tinggi (TDS 130 – 139 atau TDD 85 – 89) Hipertensi derajat I (TDS 130 – 139 atau TDD 85 – 89) Hipertensi derajat II (TDS 130 – 139 atau TDD 85 – 89) Hipertensi derajat III
