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Yasuhiro Nagai
yasuhiro.nagai@g.softbank.co.jp
担当領域
・LTE, LTE-Advanced, 5Gの研究開発
・モバイルアプリ向けのプロトコル開発
・ネットワーク運用への機械学習応用
・IoT-...
1Gbps 10Gbps
10ms
10 /
1ms
100 /
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25
Deliveryrate
BDP BDP+BufSize
RTT
Optimal: max BW and min RTT (Kleinrock)
amount in flight
Optimal operating point
23
De...
25
Deliveryrate
BDP BDP+BufSize
RTT
Optimal: max BW and min RTT (Kleinrock)
amount in flight
Optimal operating point
23
Deliveryrate
BDP BDP+BufSize
RTT
Loss based CC (CUBIC / Reno)
amount in flight
Loss based congestion control in deep bu...
BDP = (max BW) * (min RTT)
26
Deliveryrate
BDP BDP+BufSize
RTT
amount in flight
Est min RTT = windowed min of RTT samples
...
















5G端末
5G基地局
5Gコア
シールドルーム
client server
UDP
計測時設定の
ダウンロード速度
計測時設定の
アップロード速度
往復遅延時間
( 最小 RTT )
2Gbps 200Mbps 5~7msec
5G 環境 計測...


5G端末
5G基地局
シールドルーム
4.7GHz
5Gコア
(有線計測時のみ)
Ixia Network Emulator II
サーバマシン x 2 クライアント x 2
MTU=140010Gbps



 






























 







https://tm.softbank.jp/form/contact/5g/index.php
https://tm.softbank.jp/form/contact/5g/index.php
https://tm.softbank.jp/form/contact/5g/index.php


HTTP and 5G
HTTP and 5G
HTTP and 5G
HTTP and 5G
HTTP and 5G
HTTP and 5G
HTTP and 5G
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HTTP and 5G
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HTTP and 5G
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HTTP and 5G
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HTTP and 5G
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HTTP and 5G

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HTTP and 5G

  1. 1. 2
  2. 2. 3
  3. 3.
  4. 4. Yasuhiro Nagai yasuhiro.nagai@g.softbank.co.jp 担当領域 ・LTE, LTE-Advanced, 5Gの研究開発 ・モバイルアプリ向けのプロトコル開発 ・ネットワーク運用への機械学習応用 ・IoT-platformの事業開発 ・IoT向けモバイル規格 (NIDD) の事業応用 ・MaaS事業の事業開発、要素技術開発
  5. 5. 1Gbps 10Gbps 10ms 10 / 1ms 100 / 5G4G
  6. 6. 35 4 35 35
  7. 7. 0
  8. 8. ? ?
  9. 9. 0 GC 4 1 N G N N 4 5 1
  10. 10. 1 1 00 GC E C E N N 5 ( )( -)
  11. 11. () X U NW 1 6 C
  12. 12. 5 1 JShtml CSS
  13. 13. 5 G T 8 C
  14. 14. A82 A82 V I G5 N 0 G D / 1
  15. 15. F e C M tr n E U 2 / 2/ P tr n e d i r I g g BG P r A 0
  16. 16. 
 
 

  17. 17. 
 
 
 
 
 
 
 
 
 

  18. 18.
  19. 19. 
 
 
 
 
 
 
 
 

  20. 20. 
 
 
 
 
 

  21. 21. 25 Deliveryrate BDP BDP+BufSize RTT Optimal: max BW and min RTT (Kleinrock) amount in flight Optimal operating point 23 Deliveryrate BDP BDP+BufSize RTT Loss based CC (CUBIC / Reno) amount in flight Loss based congestion control in deep buffers BDP = (max BW) * (min RTT) 26 Deliveryrate BDP BDP+BufSize RTT amount in flight Est min RTT = windowed min of RTT samples Est max BW = windowed max of BW samples Estimating optimal point (max BW, min RTT)
  22. 22. 25 Deliveryrate BDP BDP+BufSize RTT Optimal: max BW and min RTT (Kleinrock) amount in flight Optimal operating point
  23. 23. 23 Deliveryrate BDP BDP+BufSize RTT Loss based CC (CUBIC / Reno) amount in flight Loss based congestion control in deep buffers
  24. 24. BDP = (max BW) * (min RTT) 26 Deliveryrate BDP BDP+BufSize RTT amount in flight Est min RTT = windowed min of RTT samples Est max BW = windowed max of BW samples Estimating optimal point (max BW, min RTT)
  25. 25.
  26. 26. 
 
 
 

  27. 27.
  28. 28. 
 

  29. 29. 5G端末 5G基地局 5Gコア シールドルーム client server UDP 計測時設定の ダウンロード速度 計測時設定の アップロード速度 往復遅延時間 ( 最小 RTT ) 2Gbps 200Mbps 5~7msec 5G 環境 計測環境概要 4.7GHz 

  30. 30. 
 5G端末 5G基地局 シールドルーム 4.7GHz 5Gコア (有線計測時のみ) Ixia Network Emulator II サーバマシン x 2 クライアント x 2 MTU=140010Gbps
  31. 31.
  32. 32. 
 

  33. 33. 
 

  34. 34. 
 

  35. 35.
  36. 36. 
 

  37. 37. 
 

  38. 38.
  39. 39.
  40. 40.
  41. 41. 
 
 
 

  42. 42.
  43. 43.
  44. 44.
  45. 45. https://tm.softbank.jp/form/contact/5g/index.php
  46. 46. https://tm.softbank.jp/form/contact/5g/index.php
  47. 47. https://tm.softbank.jp/form/contact/5g/index.php
  48. 48.

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