báo cáo wireless phần 1

1.1 nh g xuyên e giá ng (AP - access point) (access point) u khách hàng, c (infrastructure) 2.2.3 Microcells roaming i microcell không cho (Frequency Hopping pread Spectrum) (Direct Sequence Spread Spectrum) chip ode ) chipping c 2.4.9 Chi phí 2.4.12 An toàn (ESS) Portal Portal : exponential random backoff không dây, hai lý chính: (Pos itive Acknowledge Distributed Inter Frame Space, Không gian khung Inter phân tán Virtual Carrier Sense) Virtual Carrier Sense r, rrier Sense) L MAC , Network Allocation Vecto Physical Ca .. .1. 1 nh g xuyên e giá ng (AP - access point) (access point) u khách hàng, c (infrastructure) 2.2.3... Hopping pread Spectrum) (Direct Sequence Spread Spectrum) chip ode ) chipping c 2.4.9 Chi phí 2.4 .12 An toàn (ESS) Portal Portal : exponential random backoff không dây, hai lý chính: (Pos itive