Ubee DDW3612 User Manual

Also see for DDW3612: Setup guide

Contents

Ubee DDW3612 User Manual Manual pdf 54 page image

3.8 Wireless Ubee Interactive50 DDW3612 Subscriber User Guide • July, 20103.8.7 Additional Information - WiFi MultiMedia (WMM)WMM QoS is a part of the IEEE 802.11e QoS enhancement to certified WiFi wirelessnetworks. On wireless access points without WMM QoS, all traffic streams are giventhe same access priority to the wireless network. If the introduction of another trafficstream creates a data transmission demand that exceeds the current networkcapacity, then the new traffic stream reduces the throughput of the other trafficstreams. A WMM QoS capability in a network may assign access categories (ACs) tovarious streams of packets. The assigned AC of a stream of packets may depend onthe packets' priority, for example, as assigned by an application, and may be referredPower Save Support Select On or Off to turn on or off power savings. WMM PowerSave increases the efficiency and flexibility of data transmission.Specifically, the wireless client device can "doze" betweenpackets to save power, while the wireless access point buffersdownlink frames. The application chooses the time to wake upand receive data packets to maximize power conservationwithout sacrificing Quality of Service.EDCA-AP Parameters Enhanced Distributed Channel Access - Access Point. In thisarea of the screen, four Access Categories (ACs) are listed toprioritize wireless network traffic. Refer to the next row below.AC-BEAC-BKAC-VIAC-VOThe Wi-Fi Multimedia feature prioritizes traffic according to fouraccess categories (ACs):AC-BE—Best Effort, medium throughput and delay. Mosttraditional IP data is sent to this queue.AC-BK—Background, high throughput. Bulk data that requiresmaximum throughput and is not time-sensitive is sent to thisqueue (for example, FTP data).AC-VI—VideoAC-VO—VoiceCWmin/CWmax/AIFSN For each AC, set the following fields:CWmin/CWmaxAIFS—Interframe SpaceBack off CounterTXOP (b) Limit(usec)/TXOP (a/g) Limit(usec)/Discard OldestFirstEnter a TXOP limit. Each AC is assigned a Transmit Opportunity(TXOP). A TXOP is a bounded time interval during which astation can send as many frames as possible (as long as theduration of the transmissions does not extend beyond themaximum duration of the TXOP). If a frame is too large to betransmitted in a single TXOP, it should be fragmented intosmaller frames. The use of TXOP reduces the problem of lowrate stations gaining an inordinate amount of channel time in thelegacy 802.11 DCF MAC. A TXOP time interval of 0 means it islimited to a single MSDU or MMPDU.EDCA STA Parameters These settings are used for receiving terminals.CWmin/CWmax/AIFSNTXOP (b) Limit(usec)/TXOP (a/g) Limit(usec)Refer to the rows above for definitions of these fields.Apply Click to save all changes.