Brief Analysis of the Relationship Between WiMax and WiFi

The Relationship Between WiMax and WiFi is not in the same category. WiFi is a standard IEEE802.11x-related interoperability organization of the wireless LAN, wiMax is a standard IEEE 802.16x-related interoperability organization for wireless MAN. The two are applicable to different application types.

Compared with WiFi, WiMax has better physical layer and MAC layer technologies, higher speed, better QoS, and competition. Wi-Fi is mainly used in the wireless LAN field, while WiMax is mainly used in the wireless MAN field. There is a complementary relationship between the two. It can be considered that WiFi is more suitable for indoor use in the city, while WiMax is more suitable for outdoor use in the city.

The Base Station BS provides an IEEE 802.16d-compliant air interface to connect the terminal station SS to the network.

For ease of understanding, BS can be considered as a wireless router, providing a simple layer-3 switching function. Shows the BS protocol stack model:

802.16d PHY 802.16d MAC 802.3 PHY 802.3 MAC 802.2 llc ip wireless port wired port physical layer link layer network Reference Model

In the 802.16 standard, the MAC layer is further divided into three sub-layers: the specific service aggregation layer (SSCS), the public part sub-layer (CPS), and the security sub-layer (PS ). The SSCS layer receives upper-layer packets through a CS-SAP (CS Service Access Point: Service Access Point.

802.16 two CS types are supported: atm cs and group CS. Currently, the system supports ing packets of the group CS type to the 802.16 connection, and provides the 802.3 Ethernet interface in the Wired part.

1. WiMAX for touch Wi-Fi: 802.16x Wireless Technology
2. The development of WiMAX and Wi-Fi Integration
3. WiMAX "fire fight" 3G, Wi-Fi, DSL, Cable