Firstly, the technical features and frequency characteristics of IEEE802.11x protocol in wireless local area network (WLAN) are introduced. The functional relationship of path loss and coverage distance in dense urban and suburb is shown in figures. The uplink and downlink radio power budget of current WLAN outdoor coverage is calculated. Secondly, calculation and comparison of WLAN pass loss, link budget and cell coverage radius is done for dense urban and suburb. Thirdly, hot spot area WLAN

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... tdoor coverage signal strength is simulated in dense urban for several situations by using simulation software. The results of simulation validate the accuracy of the calculation for uplink/downlink power budget, path loss in WLAN 2.4GHz band and WLAN cell coverage radius. The cell coverage radius for dense urban and suburb is 300~500m and 1000~1200m respectively. Finally, a valuable hot spot area WLAN outdoor coverage deployment suggestion is given: high power WLAN BTS/AP and high gain antenna with 4 sectors deployment will improve the uplink/downlink power budget; enlarge radio coverage in hot spot area. The analysis in this paper is significant for the deployment of wireless digital city.