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- W970654405 abstract "This chapter discusses the techniques for handling variations in the instantaneous radio-link quality. These are Channel-dependent scheduling, link adaptation, and hybrid Automatic Repeat Request (ARQ). Channel-dependent scheduling in a mobile communication system deals with the question of how to share the radio resources that are available in the system so as to achieve efficient resource utilization. This implies to minimize the amount of resources needed per user and thus allow for as many users as possible in the system. Closely related to scheduling is link adaptation, which deals with how to set the transmission parameters of a radio link to handle variations of the radio-link quality. Both channel-dependent scheduling and link adaptation tries to exploit the channel variations through appropriate processing prior to transmission of the data. However, due to the random nature of the variations in the radio-link quality, perfect adaptation to the instantaneous radio-link quality is never possible. Hybrid ARQ, which requests retransmission of erroneously received data packets, is therefore useful. This can be seen as a mechanism for handling variations in the instantaneous radio-link quality after transmission and nicely complements channel-dependent scheduling and link adaptation. Hybrid ARQ also serves the purpose of handling random errors such as noise in the receiver." @default.
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- W970654405 date "2007-01-01" @default.
- W970654405 modified "2023-10-14" @default.
- W970654405 title "Scheduling, link adaptation and hybrid ARQ" @default.
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- W970654405 doi "https://doi.org/10.1016/b978-012372533-2/50011-1" @default.
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