On the design of user pairing algorithms in full duplexing wireless cellular networks

Choi, Hyun-Ho

doi:10.1109/ictc.2014.6983189

Cited by 14 publications

(21 citation statements)

References 13 publications

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“…In this section we provide a distributed method to solve (17). As discussed in Section I, FD throughput gain is available only under certain propagation conditions, distances among nodes in the network, and power levels.…”

Section: A Distributed Full Duplex Multi-cell Resource Allocationmentioning

confidence: 99%

User Selection and Power Allocation in Full-Duplex Multicell Networks

Goyal

Liu

Panwar

2017

IEEE Trans. Veh. Technol.

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Abstract-Full duplex (FD) communications has the potential to double the capacity of a half duplex (HD) system at the link level. However, in a cellular network, FD operation is not a straightforward extension of half duplex operations. The increased interference due to a large number of simultaneous transmissions in FD operation and realtime traffic conditions limits the capacity improvement. Realizing the potential of FD requires careful coordination of resource allocation among the cells as well as within the cell. In this paper, we propose a distributed resource allocation, i.e., joint user selection and power allocation for a FD multi-cell system, assuming FD base stations (BSs) and HD user equipment (UEs). Due to the complexity of finding the globally optimum solution, a sub-optimal solution for UE selection, and a novel geometric programming based solution for power allocation, are proposed. The proposed distributed approach converges quickly and performs almost as well as a centralized solution, but with much lower signaling overhead. It provides a hybrid scheduling policy which allows FD operations whenever it is advantageous, but otherwise defaults to HD operation. We focus on small cell systems because they are more suitable for FD operation, given practical self-interference cancellation limits. With practical self-interference cancellation, it is shown that the proposed hybrid FD system achieves nearly two times throughput improvement for an indoor multi-cell scenario, and about 65% improvement for an outdoor multi-cell scenario compared to the HD system.

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Section: A Distributed Full Duplex Multi-cell Resource Allocationmentioning

confidence: 99%

User Selection and Power Allocation in Full-Duplex Multicell Networks

Goyal

Liu

Panwar

2017

IEEE Trans. Veh. Technol.

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“…As a result, coexistence of both UL and DL transmission on the same channel at the same time in the FD cellular network causes 2 Wireless Communications and Mobile Computing so-called interuser interference from UL users to DL users. Therefore, smart interference management techniques are necessary to manage this interuser interference and several algorithms including resource management, power control, user pairing/scheduling, and their optimization have been investigated to enhance performances in terms of system throughput, outage probability, and coverage [9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Outage Analysis of User Pairing Algorithm for Full-Duplex Cellular Networks

Choi

Noh

2019

Wireless Communications and Mobile Computing

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In a full-duplex (FD) cellular network, a base station transmits data to the downlink (DL) user and receives data from uplink (UL) users at the same time; thereby the interference from UL users to DL users occurs. One of the possible solutions to reduce this interuser interference in the FD cellular network is user pairing, which pairs a DL user with a UL user so that they use the same radio resource at the same time. In this paper, we consider a user pairing problem to minimize outage probability and formulate it as a nonconvex optimization problem. As a solution, we design a low-complexity user pairing algorithm, which first controls the UL transmit power to minimize the interuser interference and then allows the DL user having a worse signal quality to choose first its UL user giving less interference to minimize the outage probability. Then, we perform theoretical outage analysis of the FD cellular network on the basis of stochastic geometry and analyze the performance of the user pairing algorithm. Results show that the proposed user pairing significantly decreases the interuser interference and thus improves the DL outage performance while satisfying the requirement of UL signal-to-interference-plus-noise ratio, compared to the conventional HD mode and a random pairing. We also reveal that there is a fundamental tradeoff between the DL outage and UL outage according to the user pairing strategy (e.g., throughput maximization or outage minimization) in the FD cellular network.

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“…In [17], joint user scheduling and channel allocation for cellular networks was considered and a suboptimal heuristic algorithm with low computational complexity was proposed. Furthermore, two heuristic user pairing algorithms were designed for throughput maximization and outage minimization, respectively [18]. Simulation results showed that these two algorithms approach optimal performance under the assumption of no residual self-interference at the FD BS.…”

Section: Introductionmentioning

confidence: 99%

“…However, up-to-date studies and theoretical performance analysis on user pairing algorithms in FD cellular network environments have not been thoroughly conducted. Compared with [18], our study newly conducts theoretical analysis of the FD cellular system based on stochastic geometry after adopting the user pairing algorithm previously proposed and then investigates the theoretical performance of FD cellular networks according to various system parameters, which have not been considered in [18].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of User Pairing Algorithm in Full-Duplex Cellular Networks

Noh

Shin

Choi

2017

Mobile Information Systems

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In a full duplexing (FD) wireless cellular network, a base station operates in FD mode, while the downlink (DL) and uplink (UL) users operate in half duplexing (HD) mode. Thus, the downlink and uplink transmissions occur simultaneously so that interuser interference from a UL to a DL user occurs. In an FD network, the main challenge to minimize the interuser interference is user pairing, which determines a pair of DL and UL users who use the same radio resource simultaneously. We formulate a nonconvex optimization problem for user pairing to maximize the cell throughput. Then, we propose a heuristic user pairing algorithm with low complexity. This algorithm is designed such that the DL user having a better signal quality has higher priority to choose its paired UL user for throughput maximization. Thereafter, we conduct theoretical performance analysis of the FD cellular system based on stochastic geometry and analyze the impact of the user paring algorithm on the performance of the FD cellular system. Results show that the FD system that uses the proposed user pairing algorithm effectively reduces the interuser interference and approaches optimal performance. It also considerably outperforms the FD system using a random user pairing and almost doubles the conventional HD system in terms of cell throughput.

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On the design of user pairing algorithms in full duplexing wireless cellular networks

Cited by 14 publications

References 13 publications

User Selection and Power Allocation in Full-Duplex Multicell Networks

User Selection and Power Allocation in Full-Duplex Multicell Networks

Outage Analysis of User Pairing Algorithm for Full-Duplex Cellular Networks

Performance Analysis of User Pairing Algorithm in Full-Duplex Cellular Networks

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