Mechanism of joint physical layer and MAC layer for handling multi-TRP UL overlapping transmissions

JING Xiaorong; XIONG Jie; SUN Jian; CHEN Qianbin

doi:10.11959/j.issn.1000-436x.2024123

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Mechanism of joint physical layer and MAC layer for handling multi-TRP UL overlapping transmissions

Papers | 更新时间：2024-09-10

- Mechanism of joint physical layer and MAC layer for handling multi-TRP UL overlapping transmissions
- Journal on Communications Vol. 45, Issue 8, Pages: 110-124(2024)
- 作者机构：
  
  1.重庆邮电大学通信与信息工程学院,重庆 400065
  2.移动通信技术重庆市重点实验室,重庆 400065
  3.重庆两江卫星移动通信有限公司,重庆 401135
- 作者简介：
- 基金信息：
- DOI：10.11959/j.issn.1000-436x.2024123
  CLC： TN92
- Received：07 March 2024，
  
  Revised：2024-06-15，
  
  Published：25 August 2024
- 稿件说明：
移动端阅览
景小荣,熊杰,孙健等.联合物理层与MAC层的multi-TRP上行重叠传输处理机制[J].通信学报,2024,45(08):110-124.

JING Xiaorong,XIONG Jie,SUN Jian,et al.Mechanism of joint physical layer and MAC layer for handling multi-TRP UL overlapping transmissions[J].Journal on Communications,2024,45(08):110-124.
景小荣,熊杰,孙健等.联合物理层与MAC层的multi-TRP上行重叠传输处理机制[J].通信学报,2024,45(08):110-124. DOI： 10.11959/j.issn.1000-436x.2024123.

JING Xiaorong,XIONG Jie,SUN Jian,et al.Mechanism of joint physical layer and MAC layer for handling multi-TRP UL overlapping transmissions[J].Journal on Communications,2024,45(08):110-124. DOI： 10.11959/j.issn.1000-436x.2024123.

摘要

针对非理想回程下现有协议难以有效处理多传输接收节点（multi-TRP）场景中多定时提前（multi-TA）导致的严重上行链路（UL）重叠传输问题，联合改进物理层复用技术和介质访问控制（MAC）令牌桶技术，提出了一种新型的UL重叠传输处理机制。该新型机制通过改进物理层重叠信道识别流程、复用要求及复用规则，将物理层复用信息与重叠信息反馈至MAC层，并对MAC层令牌桶技术进行优化。通过仿真实验对所提机制与现有协议机制进行对比，结果表明，在逻辑时隙不可重叠和可重叠2种情形下，物理上行控制信道（PUCCH）实际复用数量性能平均提升了57.58%和49.40%，物理上行共享信道（PUSCH）实际可用资源数量性能平均提升了12.09%和26.03%；优先级最高逻辑信道实际占用资源数量性能平均提升了33.33%和45.48%。

Abstract

To address the severe uplink (UL) overlapping transmission problem caused by multi-timing advance (multi-TA) in multiple transmission reception point (multi-TRP) scenario with non-ideal feedback

where existing protocols were difficult to handle effectively

a novel UL overlapping transmission handling mechanism was proposed by jointly improving physical layer multiplexing technology and medium access control (MAC) layer token bucket technology. The novel mechanism enhanced the identification process of overlapping channels at the physical layer

revised the multiplexing requirements and rules

and fed the multiplexing and overlapping information from the physical layer back to the MAC layer. Simultaneously

it optimized the token bucket technique in the MAC layer. Comparative simulations between the proposed mechanism and the processing mechanisms in existing protocols show that

in non-overlapping and overlapping logical slot scenarios

the actual number of the reused physical uplink control channel (PUCCH) performance has improved by an average of 57.58% and 49.40%

the actual available resource quantity performance of the physical uplink shared channel (PUSCH) has improved by an average of 12.09% and 26.03%

the actual occupied resource quantity of the highest priority logical channel has improved by an average of 33.33% and 45.48%.

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