diff options
| author | mo khan <mo@mokhan.ca> | 2025-09-30 18:50:06 -0600 |
|---|---|---|
| committer | mo khan <mo@mokhan.ca> | 2025-09-30 18:50:06 -0600 |
| commit | 4b89bda37cdf743b6b03e04c942f69556453945a (patch) | |
| tree | be05fceb832e7c4b0f4510c4216f1f762a327473 | |
| parent | 0613df57778c8fd67b0a57f90467dd3822779afd (diff) | |
add times for each of the 802.11 versions
| -rw-r--r-- | assignments/3/README.md | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/assignments/3/README.md b/assignments/3/README.md index c838330..04346f0 100644 --- a/assignments/3/README.md +++ b/assignments/3/README.md @@ -252,7 +252,7 @@ channel with RTS/CTS. At t = 0 it wants to transmit 1024 bytes. All other stations are idle. At what time will the station complete the transmission? At what time can the station receive the acknowledgement? -Frame sizes from 802.11 standard: +Frame sizes from 802.11b (11 Mbps) standard: - RTS frame: 20 bytes = 160 bits - CTS frame: 14 bytes = 112 bits @@ -261,7 +261,7 @@ Frame sizes from 802.11 standard: - SIFS: 0.00001 seconds - DIFS: 0.00005 seconds -Timeline: +Timeline: Assuming 802.11b 1. DIFS wait: 0.00005 1. RTS transmission: 160 bits / (11 * 10^6 bps) = 0.0000145 seconds @@ -271,15 +271,24 @@ Timeline: 1. DATA transmission: 8464 bits / (11 * 10^6 bps) = 0.0007695 seconds 1. SIFS: 0.00001 seconds 1. ACK transmission: 112 bits / (11 * 10^6 bps) = 0.0000102 seconds - -Transmission complete at: - -- 0.00005 + 0.0000145 + 0.00001 + 0.0000102 + 0.00001 + 0.0007695 -- = 0.0008642 seconds - -ACK received at: - -- 0.0008642 + 0.00001 + 0.0000102 = 0.0008844 seconds +1. Transmission complete at: + - 0.00005 + 0.0000145 + 0.00001 + 0.0000102 + 0.00001 + 0.0007695 + - = 0.0008642 seconds +1. ACK received at: + - 0.0008642 + 0.00001 + 0.0000102 = 0.0008844 seconds + +| Step | Component | 802.11b (11 Mbps) | 802.11g (54 Mbps) | 802.11n (150 Mbps) | 802.11ac (867 Mbps) | +| -- | -- | -- | -- | -- | -- | +| 1 | DIFS | 0.00005 s | 0.00005 s | 0.00005 s | 0.000034 s | +| 2 | RTS (160 bits) | 0.0000145 s | 0.000003 s | 0.0000011 s | 0.00000018 s | +| 3 | SIFS | 0.00001 s | 0.00001 s | 0.00001 s | 0.000016 s | +| 4 | CTS (112 bits) | 0.0000102 s | 0.0000021 s | 0.0000007 s | 0.00000013 s | +| 5 | SIFS | 0.00001 s | 0.00001 s | 0.00001 s | 0.000016 s | +| 6 | DATA (8192 bits) | 0.000745 s | 0.0001517 s | 0.0000546 s | 0.0000094 s | +| 7 | SIFS | 0.00001 s | 0.00001 s | 0.00001 s | 0.000016 s | +| 8 | ACK (112 bits) | 0.0000102 s | 0.0000021 s | 0.0000007 s | 0.00000013 s | +| | Transmission Complete | 0.0008499 s | 0.0002289 s | 0.0001271 s | 0.00007596 s | +| | ACK Received | 0.0008701 s | 0.0002411 s | 0.0001385 s | 0.00009225 s | ## 2.5 Bluetooth Frame Format Analysis (10%) |