Capacity and Asymptotic User Capacity of a Multiservice CDMA Uplink with Successive Interference Cancellation

Ataman, Stefan; Wautier, A.

doi:10.1109/pimrc.2006.254327

Cited by 7 publications

(3 citation statements)

References 12 publications

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“…We assume ideal interference cancellation i.e., no residual power is left from recovered and cancelled packets. This is a realistic assumption if the received power is relatively high compared to the noise power [19]. As it forms the bottleneck we only investigate the uplink portion of the resources.…”

Section: Scenario and Backgroundmentioning

confidence: 99%

System Level Integration of Irregular Repetition Slotted ALOHA for Industrial IoT in 5G New Radio

Gürsu

Moroglu

Vilgelm

et al. 2019

2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

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Automation is a key part of the new industrial revolution, that will be enabled by the deployment of thousands of sensors and actuators. The flexible deployment of these devices requires wireless connectivity which is labeled as industrial internet of things, IIoT. The sporadic activity pattern of IIoT devices naturally suggest the use of random access techniques, albeit posing new and unexplored challenges for the current wireless networks. On top of the demand for new access protocols, the latency-reliability requirements further challenge the existing random access protocols. In this work we investigate the adaptation of a well known modern random access algorithm, Irregular Repetition Slotted ALOHA (IRSA) to IIoT in 5G New Radio. The key contribution of the paper is the proposed system level protocol, Adaptive-Multichannel IRSA, that can fulfill the latency-reliability requirements. On top of this, the definition and solution of the resource allocation problem as a resource efficiency optimization guarantees that the algorithm minimizes the system resources. We show that for a set of specific requirements, AMC-IRSA can fulfill the requirements in a lot resource efficient manner. Lastly, we analyze most critical parameters to consider for integration of IRSA for 5G NR.

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Section: Scenario and Backgroundmentioning

confidence: 99%

System Level Integration of Irregular Repetition Slotted ALOHA for Industrial IoT in 5G New Radio

Gürsu

Moroglu

Vilgelm

et al. 2019

2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

View full text Add to dashboard Cite

show abstract

“…, K ) can be expressed as below where all i 's are assumed to be the same for all users, denoted by . This can be seen as a conservative case where is chosen as the maximum of all i [16,[20][21][22]. Typically, 0 1.…”

Section: System Modelmentioning

confidence: 99%

“…Accordingly, the constraints might not be always satisfied under every decoding order of SIC because different decoding orders result in different system performance, for example, the same user has the different power requirements due to different decoding orders. In [16,[21][22][23]26], whether or not the constraints of DS-CDMA systems with SIC can be satisfied is concerned, but the analysis is given only for the fixed decoding order. Moreover, the constraint of received power is only the positivity [21][22][23]26], i.e.…”

Section: Introductionmentioning

confidence: 99%

On feasibility examination of DS‐CDMA systems with imperfect successive interference cancellation

Zhou

Feng

Zhang

et al. 2010

Int J Communication

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SUMMARYIn DS-CDMA systems with the successive interference cancellation (SIC) technique, there are K ! possible decoding orders for K active users and the decoding order has considerable impact on system performance. Once the constraints on the received powers of mobile stations and the bit-energy-to-interference-powerspectral-density ratio requirements are satisfied under some decoding order of SIC, the system is feasible. Otherwise, if the constraints are violated under all possible decoding orders, the system is infeasible. It is highly time-consuming to examine the system feasibility directly by using the usual exhaustive search method (ESM) for a system with even moderate number of users. In this paper, we propose an efficient approach for examining the feasibility of DS-CDMA systems with imperfect SIC. The proposed approach has significantly lower computational complexity than that of ESM and thus benefits the quick decisions of admission control and/or scheduling, which are essential for Quality of Service provisioning in DS-CDMA systems. Furthermore, we theoretically prove that the system under the resultant decoding order obtained by the proposed approach is able to achieve the lowest outage probability among all possible decoding orders. We conduct extensive simulation experiments, and the numerical results validate our analysis and demonstrate the effectiveness of our approach.

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Effects of shadowing on the number of active users in random multi-user channels

2015

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Capacity and Asymptotic User Capacity of a Multiservice CDMA Uplink with Successive Interference Cancellation

Cited by 7 publications

References 12 publications

System Level Integration of Irregular Repetition Slotted ALOHA for Industrial IoT in 5G New Radio

System Level Integration of Irregular Repetition Slotted ALOHA for Industrial IoT in 5G New Radio

On feasibility examination of DS‐CDMA systems with imperfect successive interference cancellation

Effects of shadowing on the number of active users in random multi-user channels

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