A split architecture for random access MAC for SDR platforms

Francesco, Paolo Di; McGettrick, Seamas; Anyanwu, Uchenna K.; O'Sullivan, James; MacKenzie, Allen B.; DaSilva, Luiz A.

doi:10.1109/crowncom.2013.6636826

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…System specification evolution requires BS platform flexibility. BS adaptability has progressed from softwarecontrolled hardware-defined radios (HW) [8], through accelerator-based GPP designs [9,10] to full software physical layer software-defined radio (SDR) implementations [8].…”

Section: Base Station Evolution Into C-ranmentioning

confidence: 99%

Latency-Aware Power Management in Software-Defined Radios

Malm

Ruttik

Tirkkonen

2020

Journal of Electrical and Computer Engineering

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Cloud computing provides benefits in terms of equipment consolidation and power savings from higher utilization for virtualizable software. Cellular communication software faces challenges in cloud computing platforms. BSs create a specific load profile that differs from traditional cloud service loads. Cellular communication system implementations have real-time deadlines with fixed, periodic latency requirements. In this paper, we assess the suitability of an unmodified Ubuntu Linux OS running on a commodity server to operate latency-critical software using a 4G LTE BS software-defined radio implementation. Scaling of the CPU clock frequency is shown to be feasible without excessive impact on the platform’s ability to meet the 4 ms processing delay requirement imposed by the LTE standard. Measurements show the relationship between the processor’s operating frequency and the number of missed subframe processing deadlines to be nonlinear. The results obtained also indicate that a high computational capacity does not suffice to ensure satisfactory operation since fronthaul processing overhead can limit achievable performance. Use of offload-capable network interface cards is studied as a potential remedy.

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Section: Base Station Evolution Into C-ranmentioning

confidence: 99%

Latency-Aware Power Management in Software-Defined Radios

Malm

Ruttik

Tirkkonen

2020

Journal of Electrical and Computer Engineering

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“…A similar architectural design has been taken in [5] and the same concept has been generalized and then proved in an embedded platform. While the approach proposed in [2] and [5] provides a good trade-off between flexibility and achievable performance, the realization and any further adaptation of the time-critical functions still requires a high amount of low-level modification. In addition, this partition of MAC functionality between hardware and software makes the system architecture more complex and must be carefully planned.…”

Section: Introductionmentioning

confidence: 96%

“…Another approach, called split-functionality, has been developed by Nychis et al to move only the time-critical aspects, such as the Clear Channel Assessment (CCA) and the backoff mechanism, closer to the RF hardware [2]. A similar architectural design has been taken in [5] and the same concept has been generalized and then proved in an embedded platform. While the approach proposed in [2] and [5] provides a good trade-off between flexibility and achievable performance, the realization and any further adaptation of the time-critical functions still requires a high amount of low-level modification.…”

Section: Introductionmentioning

confidence: 98%

Enhancing the performance of random access MAC protocols for low-cost SDRs

Puschmann

Francesco

Kalil

et al. 2013

Proceedings of the 8th ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation &Amp; Characterization

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Software Defined Radio (SDR) is a technology which facilitates experimentation and the practical realization of novel wireless communication systems. Especially low-cost SDRs, however, experience high communication delays due to the connection between the radio hardware and the host computer. This delay hinders the implementation of Medium Access Control (MAC) protocols. In Carrier Sense Multiple Access (CSMA) based protocols, especially the Clear Channel Assessment (CCA) as well as the subsequent channel access phase are subject to strict temporal constraints. In this paper, we present two strategies that address both issues and aim to enhance the performance and efficiency of CSMA protocols implemented on low-cost SDRs. The first approach employs a dedicated spectrum sensing engine as a CCA agent for the SDR. The second strategy optimizes the frame transmission path inside the SDR. Experimental results indicate that both strategies have a positive impact on reducing the slot time parameter of the CSMA MAC.

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FPGA-Based Dual-Probabilities CSMA/CA Control System Design

Liu

Ding

Xiao

et al. 2014

AMM

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This paper presents a protocol to improve traditional CSMA protocol: DP-CSMA/CA protocol. In this paper, it is used in the design of WSN communication system based on FPGA. By using the method of the averaging period, we give the throughput parameters of this improved system. Simulation results confirmed that the DP-CSMA/CA protocol improves the system performance. The FPGA design is also effective to improve the performance of module in WSN. We completed the design of system based on DP-CSMA with FPGA. The test results show that: throughput are improved, packet collision is reduced, and channel utilization is improved in different load. This system has the features of simple circuit, high reliability, and programmable upgraded.

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A split architecture for random access MAC for SDR platforms

Cited by 4 publications

References 3 publications

Latency-Aware Power Management in Software-Defined Radios

Latency-Aware Power Management in Software-Defined Radios

Enhancing the performance of random access MAC protocols for low-cost SDRs

FPGA-Based Dual-Probabilities CSMA/CA Control System Design

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