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Journal Articles IEEE Transactions on Network and Service Management Year : 2022

On Coordinated Scheduling of Radio and Computing Resources in Cloud-RAN

Mahdi Sharara
Sahar Hoteit
Patrick Brown
  • Function : Author


Cloud Radio Access Network is a promising mobile network architecture based on centralizing the baseband processing of many cellular base stations in a BBU (BaseBand Unit) pool. Such architecture has many advantages. However, computing resources are shared among the base stations connected to the BBU pool. It is challenging to schedule the processing of users' data, especially on overloaded BBU pools, while respecting the time constraints imposed by the Hybrid Automatic Repeat Request (HARQ) mechanism. Given that the processing time of users' data and the computing requirement depends on the radio parameters such as the Modulation and Coding Scheme (MCS), we propose to enable the coordination between radio and computing resources schedulers; such coordination makes the selection of MCS dependent on the availability of radio and computing resources and on the ability to process data while respecting the HARQ-deadline. In this context, we propose and evaluate three Integer Linear Programming (ILP)-based schemes and three low-complexity heuristics, demonstrating their ability to reduce the wasted transmission power. Moreover, we evaluate the performance of the coordination under a multiservices scenario consisting of two services having heterogeneous requirements, enhanced Mobile Broadband (eMBB) and Ultra-Reliable Low-Latency Communication (URLLC).
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hal-03878685 , version 1 (29-11-2022)



Mahdi Sharara, Sahar Hoteit, Patrick Brown, Veronique Veque. On Coordinated Scheduling of Radio and Computing Resources in Cloud-RAN. IEEE Transactions on Network and Service Management, In press, ⟨10.1109/TNSM.2022.3222068⟩. ⟨hal-03878685⟩
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