Abstract：Deterministic technology is an important research content to meet the deterministic forwarding requirements of 6G emerging services. As the kernel system of Industry 4.0, the deterministic guarantee of Cyber-Physical System(CPS) is of vital importance for the efficiency and stability of production and the safety and reliability of service. Focusing on the deterministic requirements of CPS represented by industrial Internet, a CPS system architecture based on deterministic network technology is proposed, including deterministic communication network and deterministic system components. On this basis, the proposed system architecture is detailed designed for three typical use cases: low delay cloud control scenario, high reliability mobile control scenario and large bandwidth closed-loop control scenario, and the determinacy of delay, jitter, reliability and bandwidth is analyzed.

Abstract：With the development of mobile communication technology, the 6th Generation mobile networks(6G) network will ease the pressure on the bearer network through distributed network sinking, and optimize resource allocation through distributed coordination. However, how to ensure distributed trustworthiness and help the multi-party collaborative system is an upcoming security challenge. As a distributed ledger technology, blockchain can be applied to cross-domain authentication and cross-domain resource coordination. Blockchain can ensure the transparency of transactions and the credibility of data, and establish a trust relationship between multiple participants, which become the key technology to solve distributed trust.

Abstract：With the development of delay-sensitive services such as telemedicine and smart factories, the demand for mobile deterministic networks continues to increase. The 3GPP R16 version proposes the 5G TSC network architecture of 5G coordinated TSN, which realizes the deterministic service of the mobile network. However, the 5G TSC network architecture still faces many technical problems: not supporting joint service scheduling, not supporting long-distance WAN transmission, and not supporting application collaboration. Therefore, this paper sorts out the promotion process of 3GPP supporting mobile deterministic networks, clarifies the reasons for the existence of problems, and provides solutions based on artificial intelligence algorithms for 6G networks.

Abstract：As one of the key technologies in 6G, the integrated sensing and communication combined with cloud radio access network is a hot topic. This paper briefly introduces this two technologies. Then, the integrated sensing and communication technology for cloud wireless access network is discussed and analyzed in three aspects: network architecture, signal design and network protocol design. Finally, the challenges in future are summarized.

Abstract：6G would expand to higher frequency bands and make efficient use of low, medium and high full spectrum resources. The low-frequency spectrum will still be a key strategic resource for the development of 6G. Compared with present, Millimeter wave will play a more important role in the 6G era. Terahertz and other higher frequency bands will focus on meeting the short-range and high-capacity needs of specific scenes. At present, the propagation model for Terahertz is in the blank stage. Starting from the vision of 6G service and combined with the characteristics of Terahertz frequency band, this paper will discuss and review the research of communication propagation model in Terahertz frequency band.

Abstract：6G will bring new technical perspectives, disruptive technological innovation, full-time and panoramic technology application，and also， extensive and in-depth technology integration. Based on the trends of 6G in network connection, network performance, technology integration, data value transformation and application empowerment, super transportation, immersive experience and interaction(XR/holographic technology)，twin medical treatment, twin factory and other future applications are introduced from the aspects of evolution rhythm, architecture and application value in this paper.And also, 6G performance requirements in different scenarios are put forward to provide reference for the industry.

Abstract：As the commercialization of 5G continues to accelerate, the network construction for indoor coverage has gradually become a hot topic. At the same time, the development of 6G network, cloud native, artificial intelligence and other emerging technologies also affect the pattern of future indoor networks. Exploring a more open and intelligent wireless access network for 6G network through the need for indoor scenarios is helpful to promote the deep integration of cloud and networks at the edge. This paper firstly introduces the current situation of 5G indoor coverage, including main solutions, and analyzes its possible evolution direction in the short term according to the requirements of 6G network. Then, the relevant 6G key technologies are sorted out for indoor coverage, and the vision of the network and possible technological evolution direction for future indoor scenarios are forecasted.

Abstract：With the development of cloud native, artificial intelligence, big data and other information technologies and the advancement of the trend of cloud-network integration, 6G-oriented wireless networks are moving towards software, intelligence, openness and servitization, achieving in-depth integration of communication and computing, perception and control. Servitization is an important feature of wireless networks to realize the deep fusion of the cloud and networks in services and to empower the endogenous intelligent characteristics of the wireless network. Based on the analysis of the driving force of microservice-based wireless access network, this paper proposes the logical architecture of 6G microservice-oriented wireless access network by drawing support from the existing concepts of 5G core network. And then the paper analyzes the possible future technological evolution directions.

Abstract：In this paper，non-orthogonal multiple access(NOMA) schemes with reconfigurable intelligent surface(RIS) and decode-and-forward(DF) relay are proposed according to deep coverage requirements in 5G-Advanced and 6G. Then, system model of NOMA-RIS and NOMA-DF relay schemes are established. System analysis of NOMA-RIS and NOMA-DF relay are compared, including capacity and energy efficient. Numerical simulation and comparison analysis in typical scenarios show that RIS obtains more energy efficiency gain than DF relay as the number of array elements increases.

Abstract：From 2019, 5G standards and equipment have gradually taken shape, and the trend of communication business towards industrialization and diversification has gradually become clear, thus giving birth to the research of new communication systems. 6G, as a new generation of communication system, has been expanded in depth and breadth in terms of service comprehensiveness and precision. At present, the 6G alternative technologies include THz technology, large-scale antenna, IRS and communication perception fusion. The integration of communication and perception has become the key research technology of 6G in early 2021. It can greatly reduce the redundant deployment of the system by multiplexing the communication and perception architecture and signals. This paper will analyze the research needs, architecture and technology of 6G communication perception integration, so as to comprehensively introduce the feasibility and key research direction of 6G synaesthesia integration.

Abstract：This work investigates the dynamic spectrum sharing in the 6G enhanced ultra-reliable and low latency communications (euRLLC) services, as more and more Internet of Things(IoT) devices need to communicate between each other in the limited spectrum. This paper combines blockchain technology with 6G hybrid cloud to realize the spectrum sharing between IoT devices. Due to blockchain′s distributed storage and credibility, blockchain based dynamic spectrum sharing can achieve flexible, feasible and much more efficient spectrum allocation. This paper analyzes the process of spectrum sharing and proposes a wireless spectrum resource sharing structure in euRLLC based on reinforcement learning(RL), including resource classification, resource scheduling, overall model and neural network optimization. This design integrates blockchain and hybrid cloud to build a public management platform to register and manage the information of IoT devices using unified coding and identification standards.

Abstract：In order to meet the long-term requirements of global comprehensive three-dimensional coverage and access anytime, anywhere in the future, the space-air-ground integrated network(SAGIN) as an ideal network architecture has become an important research direction in recent years. The paper describes some typical business scenarios in future communications, analyzes the network architecture and composition of SAGIN, and studies the key technologies to realize SAGIN. Finally, it points out some of the research directions of SAGIN.

Abstract：The technique of intelligent reflective surface can significantly improve the coverage of transmitted signal, and is one of the potential techniques for B5G/6G communications. This paper introduces the progress of the key techniques of intelligent reflective surface in theoretical researches, including channel estimation, beam management, IRS-aid NOMA, IRS-aid physical layer security, and then gives the research plan of IRS in future.