Novel Access Methods in Cellular Networks Based on the Analog Bloom Filter
Novel Access Methods in Cellular Networks Based on the Analog Bloom Filter
复制标题
DOI：
10.1109/twc.2023.3235650
复制
发表时间：
2023-08
影响因子：
10.4
通讯作者：
Zhenghao Zhang;Raghav Rathi
中科院分区：
文献类型：
--
作者：
Zhenghao Zhang;Raghav Rathi
在蜂窝网络中，用户设备（UE）经常需要向基站发送控制信息。例如，为了发起连接，UE在称为PRACH的信道上发送Zadoff-Chu（ZC）序列，其中该序列是从多达64个序列中随机选择的。此外，连接的UE可以在称为PUCCH的信道上发送调度请求（SR）比特以开始上行链路数据传输。本文提出了基于模拟布隆滤波器（ABF）的ABF PRACH和ABF SR接入方法。利用ABF PRACH，UE发送由多个ZC序列组成的模式。由于模式的数量（当前为2304个）比序列的数量大得多，从而导致低得多的冲突概率，因此性能得到改善。类似地，利用ABF SR，每个连接的UE被分配唯一的模式。系统容量得到改善，因为资源由许多UE共享，而不是专用于各个UE。ABF PRACH和ABF SR都已经在现实世界的实验中得到了证明。仿真表明，ABF PRACH显著优于现有PRACH。此外，ABR SR实现了2.52倍的容量增加，同时保持非常低的错误率。
In cellular networks, the User Equipment (UE) often needs to send control information to the base station. For example, to initiate a connection, a UE transmits a Zadoff-Chu (ZC) sequence on a channel called PRACH, where the sequence is randomly selected from up to 64 sequences. Also, a connected UE may send the Scheduling Request (SR) bit on a channel called PUCCH to start an uplink data transmission. In this paper, novel access methods, namely, ABF PRACH and ABF SR, are proposed based on the Analog Bloom Filter (ABF). With ABF PRACH, a UE transmits a pattern, which consists of multiple ZC sequences. The performance is improved, because the number of patterns, currently 2304, is much larger than the number of sequences, resulting in a much lower collision probability. Similarly, with ABF SR, each connected UE is assigned a unique pattern. The system capacity is improved, because the resource is shared by many UEs, instead of dedicated to individual UEs. Both ABF PRACH and ABF SR have been demonstrated in real-world experiments. Simulations show that ABF PRACH significantly outperforms the existing PRACH. Also, ABR SR achieves a 2.52-fold increase of capacity, while maintaining very low error ratios.