Contention-Free Configured Grant Scheduling for 5G URLLC Traffic
5G networks are being designed to support ultra reliable and low latency communication (URLLC) services in many real-time industrial applications. The conventional grant-based dynamic scheduling can hardly fulfill the URLLC requirements due to the non-negligible transmission delays introduced during...
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| Published in: | 2023 60th ACM/IEEE Design Automation Conference (DAC) pp. 1 - 6 |
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| Main Authors: | , , |
| Format: | Conference Proceeding |
| Language: | English |
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IEEE
09.07.2023
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| Abstract | 5G networks are being designed to support ultra reliable and low latency communication (URLLC) services in many real-time industrial applications. The conventional grant-based dynamic scheduling can hardly fulfill the URLLC requirements due to the non-negligible transmission delays introduced during the spectrum resource grant process. To address this problem, 5G defines a grant-free transmission scheme, namely configured grant (CG) scheduling, for uplink (UL) traffic to pre-allocate spectrum resource to user equipments (UEs). This paper studies CG scheduling for periodic URLLC traffic with real-time and collision-free guarantees. An exact solution based on Satisfiability Modulo Theory (SMT) is first proposed to generate a feasible CG configuration for a given traffic set. To enhance scalability, we further develop an efficient graph-based heuristic consisting of an offset selection method and a multicoloring algorithm for spectrum resource allocation. Extensive experiments are conducted using 3GPP industrial use cases to show that both approaches can satisfy the real-time and collision-free requirements, and the heuristic can achieve comparable schedulability ratio with the SMT-based approach but require significantly lower running time. |
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| AbstractList | 5G networks are being designed to support ultra reliable and low latency communication (URLLC) services in many real-time industrial applications. The conventional grant-based dynamic scheduling can hardly fulfill the URLLC requirements due to the non-negligible transmission delays introduced during the spectrum resource grant process. To address this problem, 5G defines a grant-free transmission scheme, namely configured grant (CG) scheduling, for uplink (UL) traffic to pre-allocate spectrum resource to user equipments (UEs). This paper studies CG scheduling for periodic URLLC traffic with real-time and collision-free guarantees. An exact solution based on Satisfiability Modulo Theory (SMT) is first proposed to generate a feasible CG configuration for a given traffic set. To enhance scalability, we further develop an efficient graph-based heuristic consisting of an offset selection method and a multicoloring algorithm for spectrum resource allocation. Extensive experiments are conducted using 3GPP industrial use cases to show that both approaches can satisfy the real-time and collision-free requirements, and the heuristic can achieve comparable schedulability ratio with the SMT-based approach but require significantly lower running time. |
| Author | Han, Song Zhang, Tianyu Hu, Xiaobo Sharon |
| Author_xml | – sequence: 1 givenname: Tianyu surname: Zhang fullname: Zhang, Tianyu organization: University of Connecticut,Dept. of Computer Science and Engineering – sequence: 2 givenname: Xiaobo Sharon surname: Hu fullname: Hu, Xiaobo Sharon organization: University of Notre Dame,Dept. of Computer Science and Engineering – sequence: 3 givenname: Song surname: Han fullname: Han, Song organization: University of Connecticut,Dept. of Computer Science and Engineering |
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| Snippet | 5G networks are being designed to support ultra reliable and low latency communication (URLLC) services in many real-time industrial applications. The... |
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| SubjectTerms | 5G mobile communication Dynamic scheduling Heuristic algorithms Job shop scheduling Reliability engineering Scalability Ultra reliable low latency communication |
| Title | Contention-Free Configured Grant Scheduling for 5G URLLC Traffic |
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