Wireless and Cellular Telecommunications, Third Edition
Just in time for the rebounding wireless industry, this updated classic text offers an in-depth engineering guide for both voice and data services, Wi-Fi, 3G, WiMAX, and more.
TABLE OF CONTENTS Wireless and Cellular Telecommunications, Third Edition
Chapter 7: B3G Systems
OVERVIEW
The maximum of 3G's data rate is only 2 Mbps, which is far less than the ADSL or cable modem data speed. Also, the requirement for 4G data rate has been set as indicated in Chap. 1, Sec. 1.1. The wireless loop area network (WLAN) [1] can offer a data speed much higher than 3G due to the different technologies. WLAN (including Wi-Fi and WiMAX) were later called the B3G (Beyond 3G) system by the industry. WiFi and WiMAX will be described in this chapter. The comparison of the data rate with different standards in WLAN is shown in Fig. 7.1.
Figure 7.1: Wireless technology comparison
[1]Brian P. Crow, Indra Widjaja, Jeong Geon Kim and Prescott T. Sakai, "IEEE 802.11 Wireless Local Area Networks," IEEE Communication Magazine, Sept. 1997.
7.1 IEEE-BASED WIRELESS STANDARD SYSTEMS
IEEE wireless standards use both licensed and unlicensed bands to provide wireless nomadic and mobility services as well as the ability to provide the last mile connection for customers as shown in Fig. 7.2.
Figure 7.2: IEEE-based wireless standard versus cellular standards
Currently, IEEE 802.11 wireless-related working groups [2]- [3] and their respective frequency bands are indicated as (1) 802.11 Wireless Local Area Network (WLAN) operates at unlicensed band, 2.4 GHz (2.4 to 2.4825 GHz) and 5 GHz (5.15 to 5.35 and 5.47 to 5.825 GHz; (2) 802.15 Wireless Personal Area Network (WPAN) operates at unlicensed band, 2.4 GHZ; (3) 802.16 Broadband Wireless Access (BWA) operates at licensed and unlicensed...
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