Cluster-based Random Access Scheme for 5G URLLC

Abstract

The massive deployment of machine type communication devices (MTCDs) on the 5G wireless network without proper access control will result in congestion and network overload in the front haul. The envisaged deployment is also expected to generate large power consumption due to high signaling which poses a major problem for machine type communication (MTC). The challenge of meeting the latency requirement for one of the usage scenarios in fifth generation (5G) which is ultra-reliable and low-latency communication(URLLC) is compounded during massive access for MTC. To address the massive access needs of MTCDs while considering their different service requirement, we propose a priority-based spatial aggregation algorithm to adequately maintain a balanced trade-off between the power consumed by MTCDs and their quality of service (QoS) requirements. The proposed scheme gives priority to URLLC devices (UMTCDs) through power ramping in the physical random access channel (PRACH). The performance measures show a decrease in the average power consumed by UMTCDs during uplink massive access and a significant reduction in their latency without barring access to non-delay sensitive MTCDs.