Happy Bits Based BSR Mechanism in 5G Networks

[摘要] Being an important part of uplink dynamic scheduling, Buffer Status Report (BSR) has theoretical and practical significance for improving the resource utilization ratio of Long Term Evolution (LTE) system. Because uplink scheduler in base station is not directly aware of the UEs buffer content, the performance of its resource allocation strategy heavily relies on the accuracy of BSR feedback. However, the currently adopted non-uniform quantization mechanism for BSR, will inevitably cause considerable quantization error, thereby lead to an enormous waste of radio resources when large buffer size is taken into account. Therefore, this paper presents a revised BSR mechanism to improve the accuracy of BSR by fully utilizing two reserved bits, so called "Happy bits", in MAC BSR control element's sub-headers. Besides, this paper also proposes criteria to set those Happy bits. Simulation results show that, this new mechanism tremendously improve radio resource utilization ratio without introducing additional signalling overhead.

[发布机构] Beijing Key Laboratory of Work Safety Intelligent Monitoring, Beijing University of Posts and Telecommunications, School of Electronic Engineering, 10 XiTuCheng Rd., Haidian District Beijing, China^1

[效力级别] 无线电电子学 [学科分类] 计算机科学（综合）

[关键词] Buffer contents;Control elements;Dynamic scheduling;Non-uniform quantization;Quantization errors;Radio resources;Resource allocation strategies;Resource utilization ratios