共查询到18条相似文献,搜索用时 125 毫秒
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基于MBMS的手机电视技术 总被引:1,自引:0,他引:1
多媒体广播组播业务(MBMS)是3GPP Release 6版本中引入的一项重大功能,目的在于节省系统资源,为用户提供广播或者组播的分组数据业务.作为一种具体的MBMS应用,手机电视技术在3G业务中占有重要的地位.文中介绍了多媒体广播和组播技术(MBMS),包括MBMS的网络结构、业务流程以及基于TD-SCDMA的MBMS系统架构,对LTE中的E-MBMS技术进行了初步研究,并从逻辑结构、业务模式和信道结构等方面简单分析了从MBMS到E-MBMS的演进. 相似文献
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介绍国内外手机电视业务现状,手机电视业务技术及运营模式,分析并比较一些主要的手机电视业务保护技术,介绍基于3G MBMS业务安全的手机电视业务管理系统,探讨国内手机电视业务的运营模式. 相似文献
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叶子 《通信业与经济市场》2007,(8):56-56
8月26日,据了解为了在2008年奥运会按时给终端用户提供基于TD-SCDMA网络的3G高端业务,中国移动日前正在推进将TD-SCD凇组网方案中置入手机电视(MBMS标准)业务,多家TD厂商向中移动提交了自己基于TD-SCDMA的MBMS技术方案。[第一段] 相似文献
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经过长期的研究和发展,多媒体广播/组播业务(MBMS)在R6、R7版本的3G系统中已经取得了完整的实现,但是仍然无法满足日益增长的业务需求,尤其是用户和运营商对手机电视业务的强烈需求。随着R8规范的开始制定,一方面为了进一步提高MBMS的业务性能,另一方面需要适应新的系统架构演进/长期演进(SAE/LTE)系统,MBMS在逻辑架构、业务模式、传输方式和信道结构等方面进行了重大改进。通过分析研究,文章就这几个方面详细地阐述了从现有的MBMS(即R6/R7 MBMS)到演进多媒体广播/组播业务(E-MBMS)(包括SAE MBMS和LTE MBMS)的演进过程。 相似文献
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多媒体广播/组播业务(MBMS)是一种共享网络资源从一个数据源向多个目标传送数据的技术.MBMS不仅能实现纯文本低速率的消息类组播和广播,还能实现高速多媒体业务的组播和广播.介绍了基于WCDMA PS域网的MBMS网络结构,MBMS提供广播和组播两种业务模式的业务流程,以及3GPP在制定MBMS规范的时候,对无线接口进行的必要修改.最后认为手机电视是MBMS很重要的应用方向. 相似文献
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为了满足人们对手机电视业务的需求,3GPP和3GPP2提出了MBMS技术。本文对手机电视的三种实现方式进行比较;简要介绍了MBMS及其工作流程;最后阐述了MBMS中无线承载方式的切换方法。 相似文献
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多媒体广播主要是指移动终端用户在具有操作系统和视频功能的智能移动终端上以频道或信道的形式接收广播形式的数字音视频内容(例如电视等)。多媒体广播有两种主要技术种类:一种是广电系统的大区制的地面广播手机电视标准,另一种是基于移动通信系统蜂窝网的MBMS(多媒体广播和组播技术)标准。本文主要讨论在TD-SCDMA网络中,如何实现MBMS技术来承载多媒体广播业务。 相似文献
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DVB-H手机电视技术从传统的数字电视技术演进而来并广泛应用于3G移动通信中。回顾数字电视技术的发展历史,比较基于手机的流媒体业务、MBMS、DVB-H、MediaFLO和DVB-S不同调制方式的数字电视技术的优缺点,并分析5种传输系统在不同网络环境中的运行性能。 相似文献
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One of the key objectives of beyond 3rd generation mobile networks is the realization of enhanced end-user experience through the provision of rich multimedia services. Multimedia Broadcast/Multicast Services (MBMS) framework epitomizes the increasing popularity of such applications and is envisaged to play an instrumental role for the Long Term Evolution (LTE) proliferation in mobile market. For exploiting resource efficiency, MBMS specifications consider the Counting Mechanism which decides whether it is more efficient to deliver MBMS multicast traffic over Point-to-Point (PTP) or Point-to-Multipoint (PTM) bearers. However, the necessity to further improve MBMS resource efficiency and integrate new technologies in the frame of LTE stresses the need for an advanced Counting Mechanism. In this work we propose a novel Power Counting Mechanism for efficient selection of MBMS bearers. The proposed mechanism optimally utilizes power resources and exploits broadband characteristics and performance enhancements emerged from Multiple Input Multiple Output (MIMO) antennas used in LTE networks. 相似文献
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Antonios Alexiou Christos Bouras Vasileios Kokkinos 《Wireless Personal Communications》2011,61(2):447-464
In mobile networks, the provision of rich multimedia services, such as Mobile TV, is considered of key importance. To this
end, Multimedia Broadcast/Multicast Service (MBMS)—that was introduced in the Release 6 of Universal Mobile Telecommunication
System (UMTS)—is envisaged to play an instrumental role in the proliferation of mobile market. The reason behind the design
of MBMS was the need to provide multiple users with the same data at the same time in 3GPP (3rd Generation Partnership Project)
cellular networks. Still, MBMS performance is limited by the base stations’ transmission power. As an aftermath, efficient
power allocation techniques should be implemented so as to ensure the mass provision of multimedia applications to mobile
users. This paper proposes a novel mechanism for efficient radio bearer selection during MBMS transmissions. The proposed
mechanism is based on the concept of transport channels combination in any cell of the network. Furthermore, the mechanism
exploits the performance enhancements emerged from Multiple Input Multiple Output (MIMO) antennas and manages to efficiently
deliver multiple MBMS sessions. The proposed mechanism is thoroughly evaluated and compared with the radio bearer selection
mechanisms proposed by 3GPP. 相似文献
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Multimedia stream service provided by broadband wireless networks has emerged as an important technology and has attracted much attention. An all-IP network architecture with reliable high-throughput air interface makes orthogonal frequency division multiplexing access (OFDMA)-based mobile worldwide interoperability for microwave access (mobile WiMAX) a viable technology for wireless multimedia services, such as voice over IP (VoIP), mobile TV, and so on. One of the main features in a WiMAX MAC layer is that it can provide'differentiated services among different traffic categories with individual QoS requirements. In this article, we first give an overview of the key aspects of WiMAX and describe multimedia broadcast multicast service (MBMS) architecture of the 3GPP. Then, we propose a multicast and broadcast service (MBS) architecture for WiMAX that is based on MBMS. Moreover, we enhance the MBS architecture for mobile WiMAX to overcome the shortcoming of limited video broadcast performance over the baseline MBS model. We also give examples to demonstrate that the proposed architecture can support better mobility and offer higher power efficiency. 相似文献
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第三代移动通信技术TD-SCDMA发展至今,R4,R5已经商用普及,手机电视业务的需求更加强烈,对MBMS提出了更高的要求,基于MBMS的技术要求,通过借用cost231_hata模型的市区环境,分别对SFN检测技术和联合检测两种宏分集技术进行测试仿真,得到了两种宏分集的的优缺点,并提出改进方案。 相似文献
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异构网(Het Net)的引入及多制式网络的共存,使4G LTE网络运维复杂程度大为增加。2007年3GPP在进行LTE标准制订时,引入了LTE自组织网络(SON)机制,旨在移动网络建设和优化时能自动完成网络设备的参数配置,提升网络建设与维护效率,降低网络运营成本。经过多年的演进发展,SON功能已日渐丰富和完善。介绍了SON技术及其体系架构,举例说明了SON技术在我国的应用情况及效果,提出了SON技术发展面临的挑战。 相似文献