Wi-Fi 7
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定義
IEEE 802.11be(Extremely High Throughput)のマーケティング名称。320MHzチャネル、マルチリンクオペレーション(MLO)、4096-QAMにより最大46Gbpsのピーク速度を提供。2.4GHz、5GHz、6GHzの全バンドで動作する。
What Wi-Fi 7 Adds Over Wi-Fi 6
Wi-Fi 7 (802.11be), branded Wi-Fi 7 by the Wi-Fi Alliance, targets 46 Gbps maximum theoretical throughput — roughly five times Wi-Fi 6The marketing name for IEEE 802.11ax, a Wi-Fi standard that improves efficiency in dense environments through OFDMA, MU-MIMO, BSS coloring, and Target Wake Time (TWT). Operates on both 2.4 GHz and 5 GHz bands.. The headline features are 320 MHz channel bandwidth (double Wi-Fi 6E's 160 MHz maximum) and 4096-QAM modulation (vs. 1024-QAM in Wi-Fi 6), packing more bits per symbol. More transformative for real-world deployments is Multi-Link Operation (MLO).
Multi-Link Operation
MLO allows a single device to establish simultaneous connections across multiple bands and channels — 2.4 GHz, 5 GHz, and 6 GHz simultaneously. The Access PointA networking device that creates a wireless local area network (WLAN) by connecting wireless clients to a wired network. Unlike repeaters, access points are wired to the network backbone, providing full bandwidth to connected clients. and client negotiate which link carries each packet, enabling load balancing, reduced LatencyThe time delay for a data packet to travel from source to destination, typically measured in milliseconds (ms). Lower latency is critical for real-time applications like video calls, gaming, and financial trading., and seamless failover if one band degrades. This is architecturally similar to how cellular networks combine LTELong-Term Evolution. A 4G wireless broadband standard that provides download speeds of 100+ Mbps using OFDMA technology. LTE-Advanced (LTE-A) extends this with carrier aggregation for even higher throughput. and 5GThe fifth generation of mobile network technology, offering peak speeds up to 20 Gbps, sub-millisecond latency, and massive device density. 5G uses mmWave, mid-band, and low-band spectrum for different coverage and speed trade-offs. bands through carrier aggregation.
16 Spatial Streams and Enterprise Implications
Wi-Fi 7 MIMOMultiple-Input Multiple-Output. A wireless technology that uses multiple antennas at both transmitter and receiver to send and receive multiple data streams simultaneously. MU-MIMO extends this to serve multiple users concurrently. scales to 16 spatial streams (vs. 8 in Wi-Fi 6), theoretically doubling the number of simultaneous MU-MIMO clients. BeamformingA signal processing technique that focuses a wireless signal toward a specific receiving device rather than broadcasting in all directions. Beamforming improves signal strength, range, and throughput for the targeted client. complexity grows proportionally — Wi-Fi 7 access points require sophisticated antenna arrays and signal processing. For enterprise deployments, Wi-Fi 7 promises to handle AR/VR workloads and near-real-time latency requirements previously reserved for wired connections. BandwidthThe maximum data transfer rate of a network link, typically measured in bits per second (Mbps, Gbps). Bandwidth represents capacity, not actual speed; real-world transfer rates depend on latency, congestion, and protocol overhead. planning must account for MLO's ability to aggregate across bands — a client can consume 320 MHz plus 160 MHz plus 80 MHz simultaneously across three links.