802.16.1 Functional Requirements, Rev. 1 - LMSC, LAN/MAN ...

123456789101112131415161718191999-12-17 IEEE 802.16s-99/00r12 802.16.1 System ModelThis section presents a high level description of a system model to be used as a framework fordeveloping 802.16.1 protocol standards. The model describes some of the main features of an802.16.1 system, and the terminology to be used by the 802.16 working group in the creation ofthe standards.As mentioned in section 1.1, an 802.16.1 “system” constitutes: an 802.16.1 MAC and PHYimplementation, in which at least one subscriber station communicates with a base station via aradio air interface (an 802.16.1 system), and services transported by the MAC and PHYprotocols. An 802.16.1 system employs point-to-multipoint (P-MP) radios operating in thevicinity of 30 GHz, but generally in the range from 10 GHz to 66 GHz, to connect a base stationto one or more subscriber stations [4][9]. Radio communications in the above range require lineof-sight(LOS) between a base station and subscriber station. LOS blocked by foliage alsocontributes heavily to signal attenuation. Figure 2-1 and Figure 2-2 [13] depict some typical802.16.1 systems. 802.16.1 systems SHALL be multiple-cell frequency reuse systems. The rangeof 802.16.1 radios varies with transmit power, LOS blockage, availability requirement, andatmospheric conditions.202122Figure 2-1: System Showing a Base Station Mounted on a Tall Bulding-5-