You are presented with multiple paper abstracts, alongside the associated literature review and chapter titles. Given the provided information, you are going to do a literature review. Please generate a coherent literature review that synthesizes the content, draws connections between different works, highlights major findings, and identifies any gaps in the existing research.

Literature Review Title: A Survey on the Viability of Confirmed Traffic in a LoRaWAN 
Chapter Title:  E. COMMON REQUIREMENTS 
1. Abstract of Cited Paper (BIB001):  Low-power wide area networking technology offers long-range communication, which enables new types of services. Several solutions exist; LoRaWAN is arguably the most adopted. It promises ubiquitous connectivity in outdoor IoT applications, while keeping network structures and management simple. This technology has received a lot of attention in recent months from network operators and solution providers. However, the technology has limitations that need to be clearly understood to avoid inflated expectations and disillusionment. This article provides an impartial and fair overview of the capabilities and limitations of LoRaWAN. We discuss those in the context of use cases, and list open research and development questions.

Literature Review:
All of the use cases mentioned previously require that the network supports downlink traffic. The downlink traffic volume is much lower than the uplink volume but still plays a vital part in making the network viable. Other use cases normally considered to be uplink only such as collecting sensor readings can still benefit from downlink traffic capability. The use of groupcasting and geocasting, BIB001 , can be an effective way of reducing traffic by specifying which nodes should transmit data whilst the rest can remain in sleep modes. In this manner, downlink traffic can be used to improve network performance and only the data that has high value will be transmitted and stored. A common theme across all of these use cases is the need for not only acknowledgements but that traffic should be spliced so that critical applications can be assured of delivery. One method, suggested in BIB002 , is that new channel hopping methods are used with dedicated uplink and downlink channels for certain (critical) packets.