Wireless Networking

CHAPTER 7

Random Access and Wireless LANs

In Chapter 4 we considered stream traffic over circuit multiplexed cellular networks. A centrally coordinated mechanism for sharing the channels provides capacity on demand to a call. The call is blocked if the requisite resource is not available. In Chapter 5 we first considered allocating resources to stream traffic to satisfy in-call QoS requirements like BER. Here, an arriving call is blocked if the in-call QoS cannot be met. We also considered resource allocation for packet multiplexed elastic traffic. In Chapter 6 we considered packet multiplexing with a centralized resource allocation of the OFDMA system. The carrier and timeslots for packet transmissions are the resources and, if a packet cannot ...