减少高定向系统中的寻呼开销
Reducing the Paging Overhead in Highly Directional Systems
摘要：
新无线电（NR）支持在高频带（例如，毫米波频率）通过使用基于窄波束的定向传输来补偿这些频率下的高传播损耗。由于每个波束的有限空间覆盖，NR中的寻呼的广播传输使用波束扫描来执行，这需要多个时隙。因此，NR中使用的寻呼过程将显著增加具有定向传输的网络的下行链路资源开销。随着我们在频带（例如太赫兹频带）上的移动，这种开销将进一步增加，这被视为下一代网络的潜在候选者之一。因此，基于NR的寻呼解决方案对于支持高度定向的系统是不可行的。在本文中，我们提出了一种新的最小反馈使能寻呼机制，而不是使用所有的波束进行寻呼传输，只激活具有一个或多个UE的覆盖范围内的波束的子集。实现UE存在指示以识别要激活的波束的正确集合。我们的分析和仿真表明，与基于NR的解决方案相比，所提出的解决方案显著降低了下行链路寻呼开销（例如，对于在每个寻呼时机200个UE的UE密度下支持64个波束的系统，增益大于80%），同时在UE侧引起最小的能量成本。
英文摘要：
New Radio (NR) supports operations at high-frequency bands (e.g., millimeter-wave frequencies) by using narrow beam based directional transmissions to compensate high propagation losses at such frequencies. Due to the limited spatial coverage with each beam, the broadcast transmission of paging in NR is performed using beam sweeping, which takes multiple time slots. Thus, the paging procedure used in NR would substantially increase the downlink resource overhead of the network with directional transmissions. Such overhead would further increase as we move higher in the frequency bands, such as terahertz bands, which is being viewed as one of the potential candidates for future generation networks. Therefore, the NR based paging solution is infeasible for supporting highly directional systems. In this paper, we propose a novel minimal feedback enabled paging mechanism, which instead of using all the beams for paging transmissions, only activates sub-set of beams having one or more UEs under the coverage. UE presence indications are implemented to identify the correct set of beams to be activated. Our analytical analysis and simulations show that the proposed solution significantly reduces the downlink paging overhead compared to the NR based solution (e.g., more than 80% gain for a system supporting 64 number of beams at a UE density of 200 UEs per paging occasion) while incurring minimal energy cost at the UE side.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
