Full duplex is a scheme that changes the duplexing paradigm in wireless communication networks. Enabled by self-interference cancellation methodology, it unlocks the potential to improve frequency utilization efficiency and reduce resource allocation latency. However, embracing the full duplex scheme in a mobile network can lead to complications in terms of cross-link interference among network entities. As a matter of fact, a successful network integration for the scheme must consider handling these emerging types of interference. On the other hand, diversification in evolving 5G networks - struggling to address unprecedented broad demands - allows the opportunity to consider full duplex operation at a newly emerging network entity type, which is the integrated access and backhaul (IAB) node. Indeed, this might be the beginning of a network adoption series for the scheme. For instance, the non-terrestrial network, another newly emerging use case, can be the next to benefit from full duplex resource utilization. On the matter of standardized solutions, 3GPP has specified several cross-link interference handling mechanisms, which eases the integration process of the scheme at the network infrastructure level, and paves the way for later phases of user equipment adoption. This incremental network adoption ensures the required technological maturity of self-interference cancellation. In practical terms, self-interference cancellation requirements depend on device type and its deployment environment. As the environment defines the properties of the self-interference channel, it must be known to the self-interference canceller. To assess the full duplex adoption feasibility in the IAB use case, we present experimental study outcomes of self-interference channel measurement addressing the outdoor deployment scenario of an IAB node.

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5G和蜂窝网络之外的全双工演进面临的干扰处理挑战

全双工是一种在无线通信网络中更改双工范式的方案。通过自干扰消除方法，它释放了提高频率利用效率和减少资源分配等待时间的潜力。然而，在移动网络中采用全双工方案会导致网络实体之间的交叉链路干扰方面的复杂化。实际上，该方案的成功网络集成必须考虑处理这些新兴类型的干扰。另一方面，不断发展的5G网络的多样化（努力解决前所未有的广泛需求）使人们有机会考虑在新兴的网络实体类型（即集成接入和回程（IAB）节点）上进行全双工操作。的确，这可能是该方案的网络采用系列的开始。例如，另一个新出现的用例非地面网络可能是下一个受益于全双工资源利用的网络。关于标准化解决方案，3GPP已经指定了几种交叉链路干扰处理机制，从而简化了该方案在网络基础架构级别的集成过程，并为以后的用户设备采用铺平了道路。这种渐进式的网络采用确保了自干扰消除所需的技术成熟度。实际上，自干扰消除要求取决于设备类型及其部署环境。当环境定义自干扰信道的属性时，自干扰消除器必须知道它。