A Channel Bandwidth Illustration IEEE C802.20-03/112 Prepared by: Walter Rausch, Sprint Broadband
What’s Important About Bandwidth? • Per user performance to exceed 3G capabilities (with spectral efficiency, drives minimum bandwidth requirements) • Must fit into existing bandplans • Allow the evaluation group to select a test criteria • No system can be designed without specifying a channel bandwidth
Beyond 3G Performance • We are specifying performance targets beyond that offered by 3G systems. • Currently, the only competition in this space are fixed systems based on cable or DSL infrastructures. • The goal is mobility with DSL-like performance.
Worldwide Bandplans • Worldwide, nearly all regulatory bodies make spectrum available such that the minimum common divisor is 5 MHz
Test & Evaluation Requirements • Selection of a channel bandwidth is required for the evaluation group to specify test criteria • Final system designs will require the specification of the occupied channel bandwidth
Recommendation • A 5 MHz channel bandwidth provides adequate spectrum to meet the 802.20 PAR • Worldwide, a 5 MHz channel bandwidth fits the current regulatory schema • A 5 MHz minimum specification will scale smoothly to fit large spectrum allocations • In an Nx5 MHz configuration, N=1, 2, 3, ½, ¼, or another multiple, to allow for sub- or super-channel operation
Proposed Text • The AI shall use a 5 MHz channel size as the baseline (default) bandwidth • This 5 MHz may be sub- or super-channelized as required by specific implementations (N x 5 MHz, where N may be an integer or fraction) • Evaluation criteria will use the 5 MHz channel size as the default bandwidth