Chengli Mei’s research while affiliated with China Telecom Beijing Research Institute and other places

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Publications (16)


Survey on Dynamic Routing Networking Methods in Integrated Satellite-Terrestrial Network
  • Conference Paper

August 2023

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11 Reads

Heng Wang

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Jianxiu Wang

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Wen Qi

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[...]

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Xu Xia


Figure 1. The scenario of the space-air-ground collaborative network.
Figure 2. Convergence process of proposed algorithm under a different number of ground devices.
Figure 3. Weighted energy consumption of the system versus different task data size.
Figure 4. Weighted energy consumption of the system versus different number of ground devices.
Joint Task Offloading and Resource Allocation for Space–Air–Ground Collaborative Network
  • Article
  • Full-text available

July 2023

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39 Reads

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2 Citations

Drones

The space–air–ground collaborative network can provide computing service for ground users in remote areas by deploying edge servers on satellites and high-altitude platform (HAP) drones. However, with the growing number of ground devices required to be severed, it becomes imperative to address the issue of spectrum demand for the HAP drone to meet the access of a large number of users. In addition, the long propagation distance between devices and the HAP drone, and between the HAP drone and LEO satellites, will lead to high data transmission energy consumption. Motivated by these factors, we introduce a space–air–ground collaborative network that employs the non-orthogonal multiple access (NOMA) technique, enabling all ground devices to access the HAP drone. Therefore, all devices can share the same communication spectrum. Furthermore, the HAP drone can process part of the ground devices’ tasks locally, and offload the rest to satellites within the visible range for processing. Based on this system, we formulate a weighted energy consumption minimization problem considering power control, computing frequency allocation, and task-offloading decision. The problem is solved by the proposed low-complexity iterative algorithm. Specifically, the original problem is decomposed into interconnected coupled subproblems using the block coordinate descent (BCD) method. The first subproblem is to optimize power control and computing frequency allocation, which is solved by a convex algorithm after a series of transformations. The second subproblem is to make an optimal task-offloading strategy, and we solve it using the concave–convex procedure (CCP)-based algorithm after penalty-based transformation on binary variables. Simulation results verify the convergence and performance of the proposed iterative algorithm compared with the two benchmark algorithms.

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Use Case Analysis and Architecture Design for 5G Emergency Communications

October 2022

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15 Reads

Lecture Notes in Electrical Engineering

5G has significant advantages in emergency communications. If it is directly deployed in the disaster area, there are still some disadvantages such as large data traffic and long service delays. This paper analyzes the needs of public safety network (PSA), and studies the application of dynamic messaging delivery, network slicing, C-RAN, and D2D in 5G PSA. Then, this paper puts forward two 5G emergency rescue solutions, one is the portable 5G private network and 5G public network collaboration, and the other is the public network UPF sinking. Finally, we compare these two solutions according to the needs of the emergency management department. The conclusion is that the portable 5G private network and 5G public network collaboration solution can be independently deployed locally. It does not have the limitations of the 5G public network UPF sinking solution but has the same network functions, which is more in line with the requirements of the emergency management department.KeywordsEmergency communicationsPublic safety network (PSA)Lightweight 5GC5G private networkUPF sinking


Citations (9)


... Dynamic strategies have been widely studied in SATCOM. The authors of [7] proposed a dynamic selection method in satellite-terrestrial networks where a power and server execution rate joint-optimization scheme is developed. UTs are able to access the proper node with the minimum expense. ...

Reference:

Multiple Nodes Co-Carrier Cooperative Transmission in LEO Communication Networks: Developing the Diversity Gain of Satellites
Dynamic Selection Mechanism of Access Strategies in Integrated Satellite-Terrestrial Network
  • Citing Conference Paper
  • June 2023

... Ground devices access HAP drones through the C-band. HAP drones are directly connected to LEO satellites through the Ka-band to achieve high-rate traffic backhaul [26]. ...

Joint Task Offloading and Resource Allocation for Space–Air–Ground Collaborative Network

Drones

... The study into NTN cooperation with the TN network progresses towards the definition of workable architecture between both. The prominent candidate of NTN technology is satellite technology, and multiple integration types are discussed in [11]. The 3GPP in Release 17 (R17) specified the enhanced functions for the foundational technologies that include coverage and capacity. ...

Research on Novel Type of Non Terrestrial Network Architecture for 6G
  • Citing Conference Paper
  • June 2023

... This proposed algorithm could minimize respectively the average task latency and the average energy consumption of edge servers. In [58], an HAP collected and processed users' task data. Distinguishing from [57], the HAP could further offload the task data to multiple satellites simultaneously for edge computing. ...

An Energy Consumption Minimization Optimization Scheme for HAP-Satellites Edge Computing
  • Citing Conference Paper
  • November 2022

... Microsensors with self-powered capabilities have substantial potential in Internet of Everything applications, as they are small and can operate independently without reliance on electrical grid supply, harvesting energy from the ambient environment instead [1][2][3][4]. By implementing solar cells using standard CMOS processes, the size of these sensors would be significantly reduced, as it integrates solar cells, energy harvesting systems, and sensor systems on a single chip, as shown in Fig. 1. ...

Survey on Energy Harvesting IoT Communication in the Future Network
  • Citing Conference Paper
  • September 2022

... Firstly, smart meters are lightweight terminal equipment [6]. Without hardware protection [7], an adversary may physically attack the smart meters to modify the electricity data or obtain the smart meters' private keys through a side-channel attack [8], thereby disguising it as a legitimate meter. Secondly, if the adversary can steal fine-grained data from smart meters, it could become a potential threat to the users' privacy. ...

A Novel Protection Mechanism for Critical Mission IoT in Smart Grid
  • Citing Conference Paper
  • August 2022

... Fifth-Generation (5G) mobile cellular networks are evolving towards a ubiquitous platform that offers large-scale and distributed communication and computation capacities to support future Machine Learning (ML) and Artificial Intelligence (AI)-based services [1]. Integration of Smart Grid (SG) with 5G network will foster accelerated transition to a flexible, softwarized, data-driven and intelligent grid, recognised by the Third Generation Partnership Project (3GPP) work plan for Release 18 of 5G standards [2]. 5G networks provide necessary bandwidth, connection density, low latency and ultrareliability to support different SG services [3]. ...

A Review of 3GPP Release 18 on Smart Energy and Infrastructure
  • Citing Conference Paper
  • July 2021

... Release 18, which supports multi-RAT systems, was introduced to provide satellite and terrestrial RANs with their own dedicated radio resource management [23]. A 5G network slice instance is composed of a set of virtual network function (VNF) instances to form the end-to-end virtual network for the slice to operate independently [24]. In a Electronics 2024, 13, 4414 3 of 30 network slice instance, both terrestrial and non-terrestrial RANs can be created by the network operator [25]. ...

5G network slices embedding with sharable virtual network functions

Journal of Communications and Networks

... The final group tackled a number of miscellaneous aspects, including enabling technologies (i.e., Software-Defined Networking (SDN)/Network Function Virtualization (NFV) (e.g., [6], [24], and [25]) and MEC (e.g., [41] and [42])), standardization perspective (e.g., [6], [18], [25], and [30]), experimentation and R&D projects (e.g., [20] and [43]- [47]), and use cases (i.e., automotive/transport [18], [48], energy [18], [49], and industry 4.0 [18]). ...

A Survey on 5G Network Slicing Enabling the Smart Grid
  • Citing Conference Paper
  • December 2019