Alvarion BreezeACCESS 4900 User Manual Page 160
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Chapter 2 - Managing a Single Device/Cell Performance Parameters Page
AlvariCRAFT Device Manager 145 User Manual
2.23.2 RTS Threshold (bytes)
The RTS Threshold parameter defines the minimum frame size that requires an
RTS/CTS (Request To Send/Clear To Send) handshake. Frames whose size is
smaller than the RTS Threshold value are transmitted directly to the wireless link
without being preceded with RTS frames. Setting this parameter to a value larger
than the maximum frame size eliminates the RTS/CTS handshake for frames
transmitted by this unit.
The available values range from 20 to 4092 bytes for all unit types except to
BreezeACCESS units with HW Revision A or B where the values range is from 20
to 2200 bytes.
In an AU, it is recommended that the default values (the highest value supported
by the unit’s hardware) be used to ensure that RTS/CTS is never used by the AU.
For AUs in the 900 MHz band the default is 60. When Tx power is bellow 22 dBm
The RTS Threshold can be changed to 4092 to improve overall performance. If the
Tx power is higher then 22 dBm it is strongly recommended not to change the RTS
Threshold from its default value of 60 since it may result in an excessive number
of CRC errors on the received side.
2.23.3 Number of Hardware Retries
The Number of Hardware Retries parameter defines the maximum number of
times that an unacknowledged packet is retransmitted. When the Adaptive
Modulation Algorithm is disabled, a frame will be dropped when the number of
unsuccessful retransmissions reaches this value. For details on the effect of this
parameter when the Adaptive Modulation Algorithm is enabled, refer to the
description of this feature in Section 2.23.10.
The Number of Hardware Retries parameter is not applicable when the Wireless
Link Prioritization Option is enabled.
The available values range is from 1 to 14.
2.23.4 AVG SNR Memory Factor
The Average SNR Memory Factor defines the weight of history (value of last
calculated average SNR) in the formula used for calculating the current average
SNR for received data frames. This average SNR is used by the ATPC algorithm in
Maximum Contention
Window
The Maximum Contention Window parameter defines the upper limit
for the maximum number C used in the back-off algorithm as
described in Minimum Contention Window above.
The available values are 7, 15, 31, 63, 127, 255, 511 and 1023.
- User Manual 1
- BreezeACCESS 1
- Legal Rights 2
- Disclaimer 3
- Limitation of Liability 4
- Important Notice 5
- About This Manual 6
- Contents 10
- Using AlvariCRAFT 16
- In This Chapter: 17
- 1.1 Installing AlvariCRAFT 18
- 1.2 Introduction 19
- 1.3 Getting Started 20
- 1.4 Using the Device Manager 26
- 1.4.2 Common Control Buttons 27
- 1.4.5 Grayed-out Fields 28
- 1.4.7 Working with Tables 29
- 1.5 How to Get Help 30
- 1.5.1 The Help Navigator 31
- 1.5.1.1 Table of Contents Tab 32
- 1.5.1.2 Index Tab 32
- 1.5.2 The Help Topic Window 33
- Menu Sub-Menu* Description 34
- Icon Tooltip Description 34
- Managing a Single Device/Cell 36
- 2.2 The Device Page 39
- Parameter Description 41
- 2.2.2 The Device Versions Tab 44
- Control page 45
- General Parameters 48
- ESSID Parameters 49
- Noise Immunity Parameters 49
- Noise Floor Parameters 49
- 2.3.1 General Parameters 50
- 2.3.4 ESSID Parameters 54
- 2.3.6 Noise Floor Parameters 59
- 2.4.1 Frequency Definition 64
- 2.4.5 DFS Detection Algorithm 67
- 2.5.1 Transmit Power Table 71
- The HW revision of the unit 72
- 2.5.3 General Tx Parameter 73
- 2.5.4 ATPC Parameters 74
- Spectrum Analysis Table 76
- 2.6.2 Spectrum Analysis Table 77
- Parameters Page 79
- 2.7.1 Basic Parameters 80
- 2.7.3 Advanced Parameters 81
- 2.7.4 Output Parameters 82
- 2.10.2 Details 90
- 2.11 Gateways Page (AU Only) 91
- AP (BU) 92
- APs (AU)/Wi 92
- (RB Only) 94
- Best AU/Best BU Parameters 95
- 2.15.11 General Controls 104
- Per RB Counters Page (BU) 106
- RB Only) 111
- 2.19 Bridging Page 112
- 2.19.1.1 General Parameters 116
- List Tab (AU Only) 129
- Add button: a new line 131
- Revert button 131
- Apply button 131
- 2.20 Service Parameters Page 132
- Disable 145
- 2.20.2.3 IP Range Option 147
- Parameters Tab (AU Only) 148
- 2.22 Security Parameters Page 154
- 2.23.2 RTS Threshold (bytes) 160
- 2.23.4 AVG SNR Memory Factor 160
- 2.23.7 Burst Mode Parameters 162
- 2.23.9 AIFS (AU and SU Only) 165
- 2.24 IP Parameters Page 170
- 2.24.3 DHCP Settings 171
- General Tab 172
- 2.25.1.3 IP Addresses Table 175
- Traps Tab (AU and BU Only) 176
- 2.26 Unit Control Page 177
- 2.26.1 General 179
- 2.26.2 Software Control 179
- 2.26.3 Configuration Control 181
- 2.28 Software Upgrade Page 188
- 2.30.2.1 Unit Control Screen 194
- 2.30.2.2 IP Parameters Screen 195
- 2.30.2.5 Best AU Screen 198
- 2.30.2.12 Security Screen 205
- 2.31.2.1 Unit Control 207
- 2.31.2.2 IP Parameters 210
- 2.31.2.4 Best AU 212
- 2.31.2.5 Bridging - VLAN 213
- 2.31.2.7 Service - General 215
- 2.31.2.9 Security 218
- 2.32 Performance Page 220
- Parameters Summary 224
- 3.1 AU/SU Device General Page 225
- 3.8 Best AU/BU Page 230
- 3.9 Bridging Page 230
- 3.10 Service Parameters Page 233
- Enable 236
- 3.11 Security Parameters Page 237
- 3.13 IP Parameters Page 240
- 3.15 Unit Control Page 242
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