User manual SMC WBR11S-N

[. . . ] USER GUIDE BarricadeTM N 150Mbps Wireless-N Mini Broadband Router SMCWBR11S-N BarricadeTM SMCWBR11S-N User Guide SMC Networks U. S. A 20 Mason Irvine, CA 92618 Phone: (949) 679-8000 SMC Networks Europe C/Fructuós Gelabert 6-8, 2o, 2a Edificio Conata II 08970 Sant Joan Despí, Barcelona, Spain Phone: +34 93 477 4920 March 2010 Pub. # 149100000057W E032010-CS-R01 Information furnished by SMC Networks, Inc. (SMC) is believed to be accurate and reliable. However, no responsibility is assumed by SMC for its use, nor for any infringements of patents or other rights of third parties which may result from its use. [. . . ] WMM employs techniques that are a subset of the developing IEEE 802. 11e QoS standard and it enables access points to interoperate with both WMM-enabled clients and other devices that may lack any WMM functionality. WMM defines four access categories (ACs): voice, video, best effort, and background. These categories correspond to traffic priority levels and are mapped to IEEE 802. 1D priority tags (see Table 3). The direct mapping of the four ACs to 802. 1D priorities is specifically intended to facilitate interoperability with other wired network QoS policies. While the four ACs are specified for specific types of traffic, WMM allows the priority levels to be configured to match any network-wide QoS policy. WMM also specifies a protocol that access points can use to communicate the configured traffic priority levels to QoS-enabled wireless clients. ­ 71 ­ CHAPTER 7 | Wireless Configuration Advanced Settings Table 3: WMM Access Categories Access Category AC_VO (AC3) AC_VI (AC2) AC_BE (AC0) WMM Designation Voice Video Best Effort Description Highest priority, minimum delay. Time-sensitive data such as VoIP (Voice over IP) calls. Time-sensitive data such as streaming video. Normal priority, medium delay and throughput. Data from applications or devices that lack QoS capabilities. Data with no delay or throughput requirements, such as bulk data transfers. 802. 1D Tags 7, 6 5, 4 0, 3 AC_BK (AC1) Background 2, 1 The Wi-Fi Multimedia section on the Wireless Settings Advanced page allows you to enable WMM and set detailed QoS parameters. Figure 37: Wi-Fi Multimedia Settings The following items are displayed in this section on this page: WMM -- Sets the WMM operational mode on the access point. When enabled, the QoS capabilities are advertised to WMM-enabled clients in the network. WMM must be supported on any device trying to associated with the access point. Devices that do not support this feature will not be allowed to associate with the access point. (Default: Enabled) APSD -- When WMM is enabled, Automatic Power Save Delivery (APSD) can also be enabled. APSD is an efficient power management method that enables client devices sending WMM packets to enter a low-power sleep state between receiving and transmitting data. (Default: Disabled) WMM Parameters -- Click the WMM Configuration button to set detailed WMM parameters. ­ 72 ­ CHAPTER 7 | Wireless Configuration Advanced Settings Figure 38: WMM Configuration The following items are displayed in the WMM Configuration window: AIFSN (Arbitration Inter-Frame Space) -- The minimum amount of wait time before the next data transmission attempt. Specify the AIFS value in the range 0-15 microseconds. CWMin (Minimum Contention Window) -- The initial upper limit of the random backoff wait time before wireless medium access can be attempted. The initial wait time is a random value between zero and the CWMin value. Specify the CWMin value in the range 0-15 microseconds. [. . . ] BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. [. . . ]