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In this paper, the thought of space division full duplex (SDFD) is introduced to improve the flexibility of traffic adaptation in time division duplex (TDD) systems. In SDFD scheme, two spatial separated transmission points (TPs), which can be two base stations (BSs), serve downlink (DL) and uplink (UL), respectively. In this case, the interference between two TPs cannot be avoided, which might affect...
In-band full-duplex, allowing simultaneous transmission and reception on the same device over the same frequency, can double the spectral efficiency theoretically. However, the severe self-interference challenges the physical layer design. Thus, to simplify the interference cancellation (IC), the space division full-duplex (SDFD) is considered, where two spatial-separated transmission points (TPs),...
This paper focuses on transmit precoding for multiuser MIMO downlink systems. In multiuser MIMO systems, multiuser interference (MUI) and noise are two well-known factors with respect to the system's performance. Block diagonalization (BD) method is proposed to completely eliminate MUI by placing the intended users in the nullspace of all the unintended users. But the BD method imposes a condition...
In a mobile relay system, the idle users can be formed as a cluster to support nearby active users. In order to reduce the complexity of the processing in the relay nodes and destination nodes, a novel transmit preprocessing method is proposed for the cluster based multi-user relay system. Block diagonalization (BD) algorithm is adopted twice in the proposed method to remove inter-cluster and intra-cluster...
Most Active Queue Management (AQM) algorithms keep the queue length of the router at a reference value. While when the network traffic is heavy, these algorithms tend to cause high packet loss ratio, large queue oscillations, etc. To address these issues, a new method called Auto-tuning Reference Queue (ARQ) is proposed in this paper, which can be incorporated in any existing AQM algorithms with fixed...
Survivability is a very important issue in telecom networks. Many previous works discuss availability-guaranteed and service-differentiated provisioning for survivable network design. Our work makes two new contributions. First, our work proposes a novel provisioning algorithm to explore the effect of link sharing among primary and backup paths. Second, the solution approach applies multi-backup protection...
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