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Science China Information Sciences

, Volume 58, Issue 8, pp 1–7 | Cite as

Using full duplex relaying in device-to-device (D2D) based wireless multicast services: a two-user case

  • GuoPeng Zhang
  • Kun Yang
  • Peng Liu
  • Yao Du
Research Paper

Abstract

D2D communication has been proposed as an important supplement to the existing centralized cellular networks which allows two physically adjacent cellular user equipments (UEs) to communicate directly. This paper concerns using D2D to improve wireless multicast services in cellular networks. Specially, we consider a D2D transmitter UE can act as a full-duplex (FD) relay to assist a cellular multicast from a base station (BS) to a group of two UEs. And a new scheme which allows an intra-cell D2D retransmission to underlay a cellular multicast is proposed. Under the constraint of the minimum signal-to-interference-and-noise ratio (SINR) required by each of the receiver UEs, the aim of the scheme is to select the best UE in a multicast group to perform the D2D retransmission with the serving BS. Thus, the aggregate transmit power consumed at the BS and at the selected UE can be minimized. The numerical results show that the proposed scheme outperforms traditional cellular multicast scheme as it consumes less transmit power to achieve the same SINR target at the receiver UEs.

Keywords

D2D communication cellular multicast full-duplex relaying power control interference management 

多叉树最大一致森林问题参数算法研究

创新点

两棵系统发生树的最大一致森林问题在计算生物学领域中是一个非常重要的NP难解问题。本文对参数化的最大一致森林问题进行了研究: 给定两棵拥有相同叶子标签集合的无根多叉系统发生树T1和T2, 以及一个参数k, 问T1和T2是否存在一个一致森林, 其包含的树的棵数不超过k, 如存在请返回这样的一个一致森林, 如不存在请回答不存在。在相关文献中, 此问题是否固定参数可解作为开放性问题被提出。本文对该问题提出了一个时间复杂度为O(4^k n^5)的参数算法, 证明了此问题是固定参数可解的。

关键词

计算生物学 多叉系统发生树 最大一致森林 TBR 距离 固定参数算法 
082301 

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Internet of Things Research CenterChina University of Mining and TechnologyXuzhouChina
  2. 2.School of Computer Science and Electronic EngineeringUniversity of EssexColchester EssexUK
  3. 3.School of Information and Electrical EngineeringChina University of Mining and TechnologyXuzhouChina

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