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在3GPPR6/R7中,通过在3G系统中增加BM-SC(BroadcastMulticastServiceCenter,广播组播业务中心)(包括定义Gmb、Gi接口),并向已有的网络实体增加MBMS功能来提供MBMS业务。因此R6/R7MBMS可以看作是对3G系统的一种功能扩展。而在E-MBMS(EnhancedMultimediaBroadcastMulticastService,增强多媒体广播多播业务)中提供了完整的逻辑架构(图1),包括在核心网中定义的MBMS逻辑实体和在接入网中定义的多小区/多播协调实体(Multi-cell/multicastCoordinationEntity,MCE),以及相关的控制面、用户面接口。E-MBMS这种完整、独立的逻辑架构,便于对MBMS各部分…

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#------------------------------------------------------------------------------

                             OPENAIR-CN
    An implementation of the Evolved Packet Core network.
    
#------------------------------------------------------------------------------
    
  Openair-cn is an implementation of the 3GPP specifications concerning the 
  Evolved Packet Core Networks, that means it contains the implementation of the
  following network elements: MME, HSS, S-GW+P-GW.
  
#---------------------
Licence info  
#---------------------
  The source code is mainly written under the Apache V2.0 License (http://www.apache.org/licenses/LICENSE-2.0). 
  The text for Apache V2.0 License is also available under LICENSE file in the same directory.
  For more details on third party software, please read the NOTICE file in the same directory.
   
#---------------------
Linux
#---------------------
  The Openair-cn code actually is written, executed, and tested on UBUNTU desktop xenial, bionic soon.
  The S-GW network element requires a linux kernel version 3.19 (for tag <= v0.3.2), tested on UBUNTU desktop 14.04 64 bits.
  The S-GW network element requires a linux kernel version >= 4.7.x (for tag >= v0.4.0, and up to commits 2018-07-17), tested on UBUNTU desktop 16.04 64 bits.
  The S-GW network element requires a linux kernel version = 4.9.x (for tag >= v0.4.0, and after commits 2018-07-17), tested on UBUNTU desktop 16.04 64 bits (xenial).
  
  
#---------------------
Collaborative work
#---------------------
  This source code is managed through a GITHUB, a collaborative development 
  platform, URL: https://github.com/OPENAIRINTERFACE/openair-cn


#---------------------
Contributions request
#---------------------
  In a general way, anybody who is willing can contribute on any part of the 
  code in any network component. Contributions can be simple bugfixes, advices
  and remarks on the design, architecture, coding/implementation, are can can 
  size up to a project collaboration.

  - We are working to upgrade to Rel14 (done by Sprint for HSS), help is needed for other Network Functions.
  - Would be good to have Cisco VPP+GTPU integrated with SPGW.
  - Integrate and fill Sprint release of PCEF, PCRF.
  - Improve SPGW code quality (would go also for C++ for SPGW higher layers, ITTI, and utils).

#---------------------
How to contribute
#---------------------
    Please visit https://www.openairinterface.org/?page_id=112 :
 

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在3GPPR6/R7中,通过在3G系统中增加BM-SC(BroadcastMulticastServiceCenter,广播组播业务中心)(包括定义Gmb、Gi接口),并向已有的网络实体增加MBMS功能来提供MBMS业务。因此R6/R7MBMS可以看作是对3G系统的一种功能扩展。而在E-MBMS(EnhancedMultimediaBroadcastMulticastService,增强多媒体广播多播业务)中提供了完整的逻辑架构(图1),包括在核心网中定义的MBMS逻辑实体和在接入网中定义的多小区/多播协调实体(Multi-cell/multicastCoordinationEntity,MCE),以及相关的控制面、用户面接口。E-MBMS这种完整、独立的逻辑架构,便于对MBMS各部分…

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