This article investigates the resource allocation of a reconfigurable intelligent surface (RIS)-aided joint communication and sensing (JCAS) system in coal mine scenario. In JCAS system, an RIS is implemented at corner zigzag tunnels to improve complicated wireless environment, where ground obstacles frequently block direct links. addition, backhaul base station with limited energy budget deplo...

Non-orthogonal multiple access (NOMA) allows users to share link resource for higher spectrum efficiency. It can be applied unmanned aerial vehicle (UAV) and mobile edge computing (MEC) networks provide convenient offloading service ground (GUs) with large-scale access. However, due the line-of-sight (LoS) of UAV transmission, information easily eavesdropped in NOMA-based UAV-MEC networks. In t...

User privacy protection is considered a critical issue in wireless networks, which drives the demand for various secure information interaction techniques. In this paper, we introduce an intelligent reflecting surface (IRS)-aided security classification communication system, reduces transmit power of base station (BS) by classifying users with different requirements. Specifically, divide into c...

Rate-Splitting Multiple Access (RSMA) has recently found favour in the multi-antenna-aided wireless downlink, as a benefit of relaxing accuracy Channel State Information at Transmitter (CSIT), while achieving high spectral efficiency and providing security guarantees. These benefits are particularly important high-velocity vehicular platoons since their Doppler affects estimation CSIT. To tackl...

To cope with the unprecedented surge in demand for data computing applications, promising concept of multi-access edge (MEC) has been proposed to enable network edges provide closer processing mobile devices (MDs). Since enormous workloads need be migrated, and MDs always remain resource-constrained, offloading from MEC server will inevitably require more efficient transmission designs. The int...

Consider the problem of minimizing the sum of a smooth (possibly non-convex) and a convex (possibly nonsmooth) function involving a large number of variables. A popular approach to solve this problem is the block coordinate descent (BCD) method whereby at each iteration only one variable block is updated while the remaining variables are held fixed. With the recent advances in the developments ...

This letter studies an intelligent reflecting surface (IRS)-aided downlink ultra-reliable and low-latency communication (URLLC) system, in which IRS is dedicatedly deployed to assist a base station (BS) send individual short-packet messages multiple users. To enhance the URLLC performance, users are divided into different groups for each group encoded single codeword. By considering time divisi...

This paper investigates a novel unmanned aerial vehicles (UAVs) secure communication system with the assistance of reconfigurable intelligent surfaces (RISs), where UAV and ground user communicate each other, while an eavesdropper tends to wiretap their information. Due limited capacity UAVs, RIS is applied further improve quality communication. The time division multiple access (TDMA) protocol...

This paper investigates a wireless powered unmanned aerial vehicle (UAV) communication network with backscatter and caching technologies. Specifically, we assume self-energized UAV cache memory is deployed as flying device (BD), term the UAV-enabled BD (UB), to relay source’s signals destination. Whereas source S can act charging station or base supply power transmit information UB using dynami...