mpdu

effect of message aggregation on 802.11n performance The 2009 802.11n Protocol was formally standardized, and once again the physical rate was increased, and the maximum physical rate reached 300Mbps. Moreover, the 802.11n A-MPDU (message aggregation) function fully improves the channel utilization of the space medium, and brings the channel load performance of the WLAN network multiplied. Below we will mainly analyze the effect of A-

. Query) Mongo query syntax: Db. access_logs_140701.find ({jxTime: {$ gt: 1407011300, $ lt: 1407011400}, "curl. sku ":" 99978033 "}). sort ({jxTime:-1 }). skip (1 ). limit (1, 100) Db. invoke_stat.find ({date: {$ gte: ISODate ("10:00:00"), $ lt: ISODate ("11:00:00 ")}}) Db. view_view.find ({view: {$ size: 10}) queries an array of less than 10 characters in length. Currently, Mongo does not support Data Length range query, for example, query a data length of less than 10, mapReduce programming o

(transmitter chains) and outputs (Cycler chains ). Q. What is channel bonding in 802.11n?802.11n can operate on two "bonded" 20 MHz channels to give an aggressive tive bandwidth of 40 MHz. The higher bandwidth can more than double the data rates as compared to 20 MHz operation. Q. How does frame aggregation in 802.11n work?To improve the Protocol efficiency and achieve higher throughput, 802.11n allows devices to aggregate and transmit multiple frames together. This is termed as "frame aggregat

, #{AP, mesh point} 8, #{p2p-client, p2p-go} 1, Total2048, #channels 1, sta/AP BI must match* #{WDS} 2048, Total2048, #channels 1, sta/AP BI must match HT Capability overrides:*MCS:FF FF FF FF FF FF FF FF FF* Maximum A-MSDU Length*Supported channel width* ShortGi for +MHz* Max A-MPDU length exponent*min mpdu start spacing Device supports TX status socket option. Device supports HT-IBSS. Device supports

) * Unknown Command ( -) * Unknown Command ( the) * Unknown Command ( the) *Connect*Disconnect supported TX frame types:* IBSS:0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0* Managed:0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0* AP:0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0* Ap/vlan:0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x

[email protected]:/#IW PHY phy0 infoWiphy phy0Max # Scan Ssids:4Max Scan IEs length:2257 bytesRetry Short Limit:7Retry Long Limit:4Coverage Class:5 (up to 2250m)//What is this for, and how is the grade divided? Device supports Ap-side u-apsd.Device supports T-dls.Available antennas:tx 0x3 RX 0x3Configured ANTENNAS:TX 0x1 RX 0x1Supported interface modes:* IBSS* Managed* AP* Ap/vlan* WDS* Monitor* Mesh Point* P2p-client* P2p-goBand 1:Capabilities:0x11efRX LDPCHt20/ht40SM Power Save DisabledRX HT20

How to network, or because of the monkey's curiosity is very heavy, understand the file system [in this monkey brother is not modest], to IO generated a strong interest, then in the entire computer IO mainly from two modules: 1) Storage 2) network.The storage part, mainly handles the correspondence between the page and the block in the Pagecache, so what about the network?The model of the wireless card in the monkey's book is:IwlwifiSo, find the corresponding source code is: Drivers/net/wireless

Describes a general way for a layer to serve its upper layers, with four types of primitives: request, instruction, response, and acknowledgement. In other words, all services in the 802.15.4 and ZigBee standards can be categorized as one of these four primitives. The original pragmatics is described in the following format: (note: For most of the readers of this article are present or future software engineers, followed by the English name to express four kinds of primitives) First, th

rate retry stages* The HW can report back.* @max_rate_tries: Maximum number of tries for each stage** @max_rx_aggregation_subframes: Maximum buffer size (number of* sub-frames) to being used for A-MPDU block ACK receiver* Aggregation.* This was only relevant if the device had restrictions on the* Number of subframes, if it relies on mac80211 to do reordering* It shouldn ' t be set.** @max_tx_aggregation_subframes: Maximum number of subframes in an* A