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The paper presents a queueing analytical model for radio link level performance analysis in spatial multiplexing multiple-input multiple-output (MIMO) wireless systems using adaptive modulation. In the physical layer, the modulation level is adaptively adjusted according to the channel quality based on quadrature amplitude modulation (QAM). In the medium access control (MAC) layer, the authors consider...
We investigate connection-level, packet-level, and energy-saving performances in a power constrained (e.g., solar-powered) OFDM/TDMA wireless mesh network. When a mesh router goes to the sleep mode to reduce energy consumption, packet-level performances (as observed by a mesh client) will be degraded since in sleep mode, a mesh router can neither receive nor transmit packets. An analytical model is...
In this paper, we analyze the radio link level queueing performance of a OFDM/TDMA network under Rayleigh fast fading channel. The probability mass function of transmission rate is derived analytically. A vacation queueing model is used to capture the data transmission corresponding to a particular user. The probability transition matrix for the queue of that particular user is formulated as quasi-birth-and-death...
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