Abstract：6G and future communication system networks will meet the requirements of a world fully connected, and revolutionary technology solutions are expected to drive the rapid growth of smart devices and service applications. This paper conducts in-depth research on topics related to significant technological applications to achieve 6G connectivity goals, including terahertz communication with broader network operations, intelligent communication environment, artificial intelligence, network automation, ambient backscatter communication, Internet of Space Things with cubesats and UAVs, cellular-free massive MIMO communication, and more. The possible problems and challenges arising from the application of the technology are also discussed.

Abstract： As a lightweight 5G technology, RedCap is a new terminal type defined in the 5G Rel-17 version, which can effectively balance the industry's demand for both technical performance and deployment costs. It is generally believed that the core value of this lightweight 5G technology lies in its integration with the excellent characteristics of NR networks, and the key issue is how to introduce RedCap based on the 5G wireless network already deployed by operators. Considering the current situation of the operators' wireless networks and analyzing the functional characteristics of RedCap related to wireless network side, a wireless network deployment plan after introducing RedCap is proposed, including wireless network upgrade plan, parameter configuration plan, and signaling overhead strategy, etc. It can provide reference for domestic operators in plan formulation and engineering implementation.

Abstract：Ultra-reliable and low-latency communications (URLLC) is one of the three application scenarios of 5G. It has the characteristics of high reliability and low delay. Modeling and evaluation for this scenario is significant for the design, planning and service application of communication systems. This paper focuses on the reliability evaluation for URLLC. By evaluating the impact of retransmission times, transceiver antenna configuration, and codebook selection on transmission reliability and parameter optimization, it is proved that the reliability requirements of URLLC scenarios can be met through reasonable configuration of the above parameters. The simulation results and conclusions in this paper can also provide reference and parameter configuration experience for the practical application and deployment of URLLC.

Abstract：At present, 5G has widely used in industrial Internet, but not formed a large-scale application in the industrial field.For the quality assurance requirements of 5G in industrial applications, such as performance, functionality, service, analyzing the application requirements of 5G in different typical industrial scenarios, a quality indicator system for 5G industrial applications is constructed in three dimensions: physical parameters, network capabilities, and business requirements. Industrial users, 5G operators, and integrators can be reached a consensus on quality indicators in industrial applications. The quality indicator system is important to guide the construction and application of 5G in the industrial field, and promote the depth development of 5G industrial applications.

Abstract：At this stage, there is a lack of active planning of communication base station infrastructure, and there are multiple sets of superimposed facilities. The power supply, backup power and space are not matched, the operation lacks refined management, the ineffective energy consumption is high, and the system operation efficiency is low.O&M has not yet achieved intelligent O&M, which is inefficient and costly, and lacks the management and evaluation of the whole life cycle of equipment. Facing the vision and goal of carbon peak and carbon neutrality, this paper studies the whole scenario and life cycle logical integrated planning method for the overall planning of the "low-carbon" target network, and builds a low-carbon planning method for the whole scenario and life cycle around the base station and computer room, and continuously evolves to the goal of green and low-carbon infrastructure, so as to provide strong support for the continuous reduction of comprehensive energy consumption and the comprehensive green and low-carbon transformation and development of the economy and society.

Abstract： Compared with 4G networks, 5G networks have significant advantages in bandwidth, delay, security, reliability and other network performance. With the popularization of 5G industry application, the enhancement of 5G network capability is becoming more and more important for network service capacity expansion and business differentiation guarantee. In particular, 5G LAN research initiated by 3GPP has helped promote the combination of 5G network and industry application. This paper has in-depth analysis of 5G LAN technology solutions for 5G 2B business. It includes comparison of application scenarios, key technologies and application schemes in 5G 2B business. Finally, implementation suggestions are given based on differentiated industrial application requirements.

Abstract：Integrated sensing and communication (ISAC) is one of the key research directions of the 6G network. At present, the industry focuses on the implementation of the sensing of base stations and terminals. How to enhance the architecture of the 6G core network to support the sensing function, how to distribute the sensing function in the 6G core network, and how to open and release the sensing result to third parties are still in the early research stage. This paper proposes a key technical implementation solution of the ISAC in the 6G core network, including the distribution of the sensing functions in the 6G core network. The 5G service based architecture(SBA) is enhanced, and a dual-bus solution is added. The original sensing data is transmitted by using a data channel interface (DCI) . Sensing measurement data or sensing results are transmitted through the service-based interface (SBI). And the implementation methods of the end-to-end sensing flow and exposure are proposed.

Abstract：The ZUC-256 algorithm architecture is analyzed，and a couple of implementation architectures suitable for FPGA are proposed for the multiple-input modulo 231-1 adder. By analyzing the critical path, various optimization schemes such as full hardware and hardware-software codesign are proposed, which can be applied to different application scenarios. Taking Zynq-7000 FPGA for example, the performance differences of each scheme are compared in detail. It has been verified that the proposed scheme can be applied to both ZUC-128 and ZUC-256 algorithms, and can be widely used in 4G LTE and 5G-NR mobile communication.

Abstract： Beam tracking is one of key technologies of millimeter wave communication systems for maintaining a stable radio link. Based on the downlink beam management procedure P1,P2,P3 and uplink beam management procedure U1,U2,U3 specified in 3GPP (3rd Generation Partnership Project) protocols, this paper analyzes and compares the resource occupation rate and beam failure probability of different beam tracking schemes. Analysis and simulation results show that the P2+P3 scheme is optimal in the sense of average resource occupation rate as the downlink resource is usually abundant in general, whereas, in the sense of beam failure probability, the U2+P3 scheme is optimal since it is free of power information feedback. In practice, an appropriate beam tracking scheme can be chosen according to the special communication requirements.