Analysis of transmission methods for ultra-reliable communications

Shariatmadari, Hamidreza; Duan, Ruifeng; Li, Zexian; Iraji, Sassan; Uusitalo, Mikko A.; Jäntti, Riku

doi:10.1109/pimrc.2015.7343682

Cited by 29 publications

(23 citation statements)

References 21 publications

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“…This function is monotonously growing in r, and monotonously decreasing in γ. When blocks are sufficiently short such an AMC scheme may be coupled with a retransmission protocol which is able to operate within the target URC latency, see [22]. Based on the measured γ 0 , and knowledge of channel statistics, we construct a probability density f (γ τ |γ 0 ).…”

Section: Robust Link Adaptationmentioning

confidence: 99%

Ultra-Reliable Link Adaptation for Downlink MISO Transmission in 5G Cellular Networks

2016

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This paper addresses robust link adaptation for a precoded downlink multiple input single output (MISO) system, for guaranteeing ultra-reliable (99.999%) transmissions to mobile users served by a small cell network (e.g. slowly moving machines in a factory). Effects of inaccurate channel state information (CSI) caused by user mobility and varying precoders in neighboring cells are mitigated. Both of these impairments translate to changes of received signal-to-noise plus interference ratios (SINRs), leading to CSI mispredictions and potentially erroneous transmissions. Knowing the statistics of the propagation channels and the precoder variation, backoff values can be selected to guarantee robust link adaptation. Combining this with information on the current channel state, transmissions can be adapted to have a desired reliability. Theoretical analysis accompanied by simulation results show that the proposed approach is suitable for attaining 5G ultra-reliability targets in realistic settings.

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Section: Robust Link Adaptationmentioning

confidence: 99%

Ultra-Reliable Link Adaptation for Downlink MISO Transmission in 5G Cellular Networks

2016

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“…In this context, microscopic and macroscopic spatial diversity techniques have shown promising benefits. As an example, the work in [2] evaluates different multiple-input multiple-output (MIMO) antenna configurations to achieve high reliability in a factory environment, whereas [3] analyses the effectiveness of different transmission methods, including microscopic diversity and hybrid automatic repeat request (HARQ) mechanisms. The work in [4], studies the benefit of combined microscopic and macroscopic diversity schemes in different locations of a regular hexagonal network, however without accounting for the multi-user multi-cell interference, which is typically a performance degrading factor.…”

Section: Introductionmentioning

confidence: 99%

Ultra-reliable communications in failure-prone realistic networks

Pocovi

Lauridsen

Soret³

et al. 2016

2016 International Symposium on Wireless Communication Systems (ISWCS)

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Abstract-We investigate the potential of different diversity and interference management techniques to achieve the required downlink SINR outage probability for ultra-reliable communications. The evaluation is performed in a realistic network deployment based on site-specific data from a European capital. Micro and macroscopic diversity techniques are proved to be important enablers of ultra-reliable communications. Particularly, it is shown how a 4x4 MIMO scheme with three orders of macroscopic diversity can achieve the required SINR outage performance. Smaller gains are obtained from interference cancellation, since this technique does not increase the diversity order of the desired signal. In addition, failures or malfunction of the cellular infrastructure are analysed. Among different types of failures evaluated, results show that failures spanning over large geographical areas can have a significant negative performance impact when attempting to support high reliability use cases.

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“…The line of work [15], [16] on HARQ design and optimization for URLLC traffic is closely related to our work. However, the key difference is that they focus only on the mean resource utilization of various HARQ schemes, whereas we focus on both the mean and variance of resource utilization of HARQ schemes in an OFDMA based system.…”

Section: A Related Workmentioning

confidence: 82%

Resource Allocation and HARQ Optimization for URLLC Traffic in 5G Wireless Networks

Anand

Veciana

2018

IEEE J. Select. Areas Commun.

156

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5G wireless networks are expected to support Ultra Reliable Low Latency Communications (URLLC) traffic which requires very low packet delays ( < 1 msec.) and extremely high reliability (∼99.999%). In this paper we focus on the design of a wireless system supporting downlink URLLC traffic. Using a queuing network based model for the wireless system we characterize the effect of various design choices on the maximum URLLC load it can support, including: 1) system parameters such as the bandwidth, link SINR , and QoS requirements; 2) resource allocation schemes in Orthogonal Frequency Division Multiple Access (OFDMA) based systems; and 3) Hybrid Automatic Repeat Request (HARQ) schemes. Key contributions of this paper which are of practical interest are: 1) study of how the the minimum required system bandwidth to support a given URLLC load scales with associated QoS constraints; 2) characterization of optimal OFDMA resource allocation schemes which maximize the admissible URLLC load; and 3) optimization of a repetition code based HARQ scheme which approximates Chase HARQ combining.

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Analysis of transmission methods for ultra-reliable communications

Cited by 29 publications

References 21 publications

Ultra-Reliable Link Adaptation for Downlink MISO Transmission in 5G Cellular Networks

Ultra-Reliable Link Adaptation for Downlink MISO Transmission in 5G Cellular Networks

Ultra-reliable communications in failure-prone realistic networks

Resource Allocation and HARQ Optimization for URLLC Traffic in 5G Wireless Networks

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