Wireless Products
Intel® Wi-Fi Products
Intel Throughput Enhancement

Overview
Intel® PROSet/Wireless Software versions 9.0 and later (Windows XP*) contain an advanced adapter setting for a feature known as Intel Throughput Enhancement. This setting enables or disables packet burst control for the Intel wireless LAN adapter. The default setting is Disabled.

Note Intel Throughput Enhancement configuration was removed from wireless Adapter Properties tab in Intel® PROSet/Wireless Software versions 13.2 and later.

Intel Throughput Enhancement can be enabled in the Advanced tab of the Intel® PRO/Wireless Network Connection properties by clearing the Use default value check box and changing the value to Enable (See figure 1).

Figure 1. Advanced Adapter Settings

You can access the adapter settings from Intel PRO/Set Wireless Software by clicking on the tools menu and then selecting adapter settings (See figure 2).

Choose Adapter Settings

Figure 2. Adapter Settings Tool

If you do not use Intel PROSet/Wireless Software, you can access the adapter card properties through the Device Manager accessible through My Computer properties, hardware tab or through the Computer Management Console of the Administrative Tools. Administrative tools can be accessed either through the regular programs menu or through the Windows Control Panel.

Packet Burst Modes
Two different packet burst modes are supported. The first mode supports WMM* (Wi-Fi Multimedia) and is enabled by negotiation with a WMM capable wireless access point. WMM is a Wi-Fi Alliance Quality of Service (QoS) enhancement to allow for priority use of bandwidth by audio, video, and voice applications. WMM support is automatically enabled on the Intel PRO/Wireless Network Connection and is not related to the value set for the Intel Throughput Enhancement. No special configuration is necessary for WMM support.

The second packet burst mode is enabled when the Intel Throughput Enhancement setting of the Intel PRO/Wireless Network Connection is set to Enable (See figure 1). The Intel Throughput Enhancement is useful when the client wishes to upload large files, stream audio or video, or share content with others. This form of packet bursting does not require any support from the wireless access point. The Intel Throughput Enhancement only increases uplink (client to access point) performance, not download performance. Therefore, enabling the Intel Throughput Enhancement will not improve performance when downloading files from the Internet or viewing Web pages.

The two packet bursting modes are mutually exclusive. That is, only one mode of packet bursting is enabled at one time. When an Intel wireless adapter is associated with a wireless access point where WMM support is negotiated, then the Intel Throughput Enhancement setting will be ignored. When a WMM association is present, only the WMM feature controls packet bursting. When a WMM association is not present, then the Intel Throughput Enhancement determines if packet bursting is enabled or disabled.

Frequently Asked Questions

Why is the feature disabled by default?
When the Intel Throughput Enhancement is enabled, the adapter does not allow for other clients to have equal access to the available wireless bandwidth.

Note Although bursting by one client does not allow for equal sharing of the wireless medium, the total throughput of the wireless medium will be higher (less idle time) when the Intel Throughput Enhancement is enabled.

When should the feature be enabled?
Consider enabling the Intel Throughput Enhancement setting when operating in an environment where equal access by all clients is not necessary and higher throughput on uploads is desired. Streaming video, uploading large files, and sharing content are examples of applications that would benefit from using the Intel Throughput Enhancement. Short duration or periodic traffic such as Voice over IP (VoIP) will not see much improvement when using the Intel Throughput Enhancement.

When should the feature be disabled?
The Intel Throughput Enhancement setting should be disabled in an environment where equal access by all clients is a priority. Intel Throughput Enhancement should be disabled in mixed-mode (802.11b and 802.11g) environments.

How does the feature work?
When the Intel Throughput Enhancement feature is enabled, the wireless adapter may transmit using the Short Interframe Space (SIFS) interval between packets instead of waiting for the expiration of the Distributed Coordination Function Interframe Space (DIFS) and additional random back-off time. The shorter wait time results in better throughput of the wireless medium.

Operating System:

Windows Vista Starter, 32-bit version*, Windows Vista Home Basic, 32-bit version*, Windows Vista Home Premium, 32-bit version*, Windows Vista Business, 32-bit version*, Windows Vista Enterprise, 32-bit version*, Windows Vista Ultimate, 32-bit version*, Windows Vista Home Basic, 64-bit version*, Windows Vista Home Premium, 64-bit version*, Windows Vista Business, 64-bit version*, Windows Vista Enterprise, 64-bit version*, Windows Vista Ultimate, 64-bit version*, Windows XP 64-Bit Edition*, Windows XP Professional*, Windows XP Home Edition*, Windows XP Tablet PC Edition*, Windows XP Media Center Edition*

This applies to:

Intel® Centrino® Advanced-N + WiMAX 6250
Intel® Centrino® Advanced-N 6200
Intel® Centrino® Advanced-N 6205
Intel® Centrino® Advanced-N 6205 For Desktop
Intel® Centrino® Advanced-N 6230
Intel® Centrino® Advanced-N 6235
Intel® Centrino® Ultimate-N 6300
Intel® Centrino® Wireless-N + WiMAX 6150
Intel® Centrino® Wireless-N 100
Intel® Centrino® Wireless-N 1000
Intel® Centrino® Wireless-N 1030
Intel® Centrino® Wireless-N 105
Intel® Centrino® Wireless-N 130
Intel® Centrino® Wireless-N 135
Intel® Centrino® Wireless-N 2200
Intel® Centrino® Wireless-N 2200 For Desktop
Intel® Centrino® Wireless-N 2230
Intel® PRO/Wireless 2200BG Network Connection
Intel® PRO/Wireless 2915ABG Network Connection
Intel® PRO/Wireless 3945ABG Network Connection
Intel® WiFi Link 1000
Intel® WiFi Link 5300 and Intel® WiFi Link 5100 products
Intel® WiMAX/WiFi Link 5350 and Intel® WiMAX/WiFi Link 5150 products
Intel® Wireless WiFi Link 4965AGN

Solution ID: CS-015402
Last Modified: 09-Apr-2014
Date Created: 02-Sep-2004
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