按需调度 Resources

Showing items tagged with "按需调度"

Application Context: Avoids multiple users simultaneously attempting to access the same physical channel by scheduling users for transmission. Users transmit data sequentially according to the scheduling order, ensuring successful transmissions. Scheduling can be divided into two types: Fixed Assignment Scheduling and On-Demand Scheduling. Contention-based (Random) Multiple Access Protocols do not involve transmission scheduling. Random multiple access protocols can be categorized into two classes: Repeated Random Access Protocols and Random Access Protocols with Reservation. The ALOHA protocol suffers from performance degradation due to packet collisions, while CSMA provides higher capacity but is vulnerable to the "hidden terminal" problem in wireless communication systems. The ISMA protocol reduces collision probability and hidden terminal issues by controlling mobile terminal packet transmission through a central base station.

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