LTE-Advanced系统中异构网双连接关键技术的研究

发布时间：2018-01-16 19:34

本文关键词：LTE-Advanced系统中异构网双连接关键技术的研究　出处：《北京邮电大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着智能终端和移动互联网的高速发展,爆炸式增长的移动数据业务量给移动网络带来了巨大的压力：不仅迫使空中接口技术不断革新,也推动了移动网络部署的转变,即由过去的全部由宏基站组成的同构网络向由不同发射功率的基站组成的异构网络的转变。3GPP LTE/LTE-Advanced无线接入技术作为ITU4G的入选技术,目前标准化工作已经处于Rel-12阶段,Rel-12的标准化工作主要集中在对包含低功率基站的异构网络的优化。回程在宽带移动通信系统中扮演着重要的角色,在密集部署低功率基站的异构网络中尤为如此。3GPP Rel-10/11提出的载波聚合技术和协作多点传输技术都需要节点之间紧密合作,仅仅适用于理想回程场景。针对3GPP Rel-12阶段提出的非理想回程场景,必须在更高层实现数据的分割与聚合。本文研究的在分组数据汇聚协议层实现数据分割与聚合的双连接技术,被认定为一种应对非理想回程部署场景的候选技术。通过不断跟进3GPP LTE-Advanced标准化进展,本文分析了双连接技术的应用场景,从用户平面和控制平面对双连接技术进行了研究,包括用户面／控制面架构的设计,架构设计实现了用户平面和控制平面的分离；对用户面／控制面的技术细节进行了研究,提出了适用于双连接的激活与去激活、上行定时提前、随机接入方案,提出了双连接通信过程中辅小区添加、修改、释放流程方案及切换流程增强方案；搭建了双连接仿真平台,从吞吐量角度验证了双连接技术的有效性；对双连接场景中小区联合机制进行了研究,提出了一种新的动态偏移量设置方案,该方案可以使网络根据自身负载水平的变化自适应改变偏移量大小,以达到负载均衡、提升网络资源利用率目的。
[Abstract]:With the rapid development of intelligent terminals and mobile Internet, has brought great pressure to the mobile data explosive growth in the volume of business to the mobile network: not only forced air interface technology innovation, but also promoted the transformation of mobile network deployment, which is composed of all the past Acer station homogeneous network to heterogeneous network composed of different base station transmit power the change of.3GPP LTE/LTE-Advanced ITU4G was selected as the wireless access technology, the current standardization work has been in the stage of Rel-12, the optimization of the standardization work of Rel-12 mainly concentrated in the heterogeneous network to include low power base stations.
Return play an important role in broadband mobile communication system in heterogeneous network, dense deployment of low power base station especially in carrier.3GPP Rel-10/11 proposed the polymerization technology and the coordinated multi point transmission technology needs close cooperation between nodes, applies only to return the ideal scene. For non ideal return 3GPP Rel-12 phase of the scene, must at a higher level to realize the data segmentation and aggregation. This research in packet data convergence protocol layer to realize data segmentation and connection technology of polymerization of double, has been recognized as a response to the non ideal backhaul candidate technology scene.
Follow up the progress of 3GPP through the LTE-Advanced standard, this paper analyzes the application scenarios of double connection technology, from the user plane and control plane of double connection technology, including design / control plane architecture user, architecture design to achieve the separation of user plane and control plane; the user plane / control plane in detail the research is put forward for dual link activation and deactivation, uplink timing, random access scheme, proposed dual link communication process in the secondary cell to add, modify and release process scheme and the handoff process enhancement scheme; build the double link simulation platform, effectiveness of double connection technology is verified from the perspective of throughput; the dual link scene cell joint mechanism is studied, put forward the plan of setting up a new dynamic offset, this scheme can make the network according to their own water load The leveling change adaptively changes the size of the offset to achieve the load balance and improve the utilization of network resources.

【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.5

【参考文献】