摘要
基于参考信号的竞争式免调度接入,参考信号的碰撞会限制其性能。考虑了一种基于纯数据(data-only)的竞争式免调度接入方案,其盲检测接收机充分利用数据本身的特点来实现多用户检测,避免了参考信号的碰撞难题以及资源开销,因而可取得高得多的业务负载。另一方面,高负载接入性能还受限于小区间干扰。data-only接入信号不包含小区级处理,每个小区基站的盲检测接收机会对所有接收到的用户信号,包括靠近本区的邻区用户信号,进行解调译码和干扰消除。这实质上实施了小区间干扰消除,因而能明显减少邻区的强干扰,进而提升系统的负载。而且data-only盲检测接收机实现小区间干扰消除并不用增加很多额外的复杂度,这是传统小区间干扰消除方法所不具备的优点。
For contention-based grant-free access, reference signal collision would restrict the performance. A data-only contention-based grant-free scheme was considered, where the blind detection receiver does not depend on reference signal to detect users’ information by fully exploiting the characteristics of the data itself, so the limitation from reference signal collision can be avoided, leading to a much higher traffic load. On the other hand, traffic load was further limited by inter-cell interference. Data-only signal does not include cell-specific processing, each cell station could detect all the received signals, including those from adjacent cells, through advanced blind detection receiver. This actually played the role of traditional inter-cell interference cancellation and therefore can achieve a better performance gain. And it would not introduce too much additional complexity.
作者
张诗壮
袁志锋
李卫敏
ZHANG Shizhuang;YUAN Zhifeng;LI Weimin(ZTE Corporation,Shenzhen 518057,China)
出处
《电信科学》
2019年第7期37-46,共10页
Telecommunications Science
关键词
竞争式免调度
碰撞
纯数据
盲检测
小区间干扰消除
contention-based grant-free
collision
data-only
blind detection
inter-cell interference cancellation
