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USER'S MANUAL OF WLAN BROADBAND ROUTER
4.29 What is WLAN Block Relay Between Clients?
An Infrastructure Basic Service Set is a BSS with a component called an Access Point
(AP). The access point provides a local relay function for the BSS. All stations in the
BSS communicate with the access point and no longer communicate directly. All frames
are relayed between stations by the access point. This local relay function effectively
doubles the range of the IBSS
4.30 What is WMM?
WMM is based on a subset of the IEEE 802.11e WLAN QoS draft standard. WMM adds
prioritized capabilities to Wi-Fi networks and optimizes their performance when multiple
concurring applications, each with different latency and throughput requirements,
compete for network resources. By using WMM, end-user satisfaction is maintained in a
wider variety of environments and traffic conditions. WMM makes it possible for home
network users and enterprise network managers to decide which data streams are most
important and assign them a higher traffic priority.
4.31 What is WLAN ACK TIMOUT?
ACK frame has to receive ACK timeout frame. If remote does not receive in specified
period, it will be retransmitted.
4.32 What is Modulation Coding Scheme (MCS)?
MCS is Wireless link data rate for 802.11n. The throughput/range performance of a AP
will depend on its implementation of coding schemes. MCS includes variables such as
the number of spatial streams, modulation, and the data rate on each stream. Radios
establishing and maintaining a link must automatically negotiate the optimum MCS
based on channel conditions and then continuously adjust the selection of MCS as
conditions change due to interference, motion, fading, and other events.
4.33 What is Frame Aggregation?
Every 802.11 packet, no matter how small, has a fixed amount of overhead associated
with it. Frame Aggregation combines multiple smaller packets together to form one
larger packet. The larger packet can be sent without the overhead of the individual
packets. This technique helps improve the efficiency of the 802.11n radio allowing more
end user data to be sent in a given time.
4.34 What is Guard Intervals (GI)?
A GI is a period of time between symbol transmission that allows reflections (from
multipath) from the previous data transmission to settle before transmitting a new
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