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1. 发明申请

US20150304896A1 HANDOVER FROM D2D TO CELLULAR WHEREBY A PDCP ENTITY IS ASSOCIATED WITH TWO RLC ENTITIES RELATED TO DIFFERENT RADIO BEARERS 审中-公开
标题翻译：由于PDCP实体与不同无线电承载相关的两个RLC实体相关，因此从D2D转换为细分
公开(公告)号：US20150304896A1
公开(公告)日：2015-10-22
申请号：US14439466
申请日：2013-10-24
申请人： RENESAS MOBILE CORPORATION
发明人： Samuli Heikki TURTINEN , Jukka Tapio RANTA , Kaisu Maria IISAKKILA , Sami-Jukka Hakola , Timo Kalevi KOSKELA
IPC分类号： H04W36/00 , H04W76/02
CPC分类号： H04W36/0022 , H04W36/00 , H04W36/0066 , H04W76/14 , H04W88/06 , H04W92/18
摘要： The application relates to a mobile terminal radio stack for D2D single channel (308) and a cellular uplink single channel (324). A D2D connection is a direct connection formed between a first mobile terminal and a second mobile terminal over the cellular radio spectrum. The D2D connection is a local communication link and is generally enabled for use over short distances. Because the D2D connection could be lost quite rapidly, handover (e.g. bearer establishment) of the D2D communications to traditional cellular communications e.g. Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Network (E-UTRAN)) may not occur in time to synchronize the multiple mobile terminals. As a result, multiple protocol data units between the mobile terminals may be lost. This problem is solved in that in response to a handover indication, the mobile terminal may then cause a PDCP entity (318) that is associated with the D2D bearer that is undergoing handover to be associated with an additional RLC entity, such as an RLC entity associated with a cellular bearer, e.g. an Evolved Packet System EPS bearer (334). SDUs received via the logical channel related to the D2D connection (314) and SDUs received via the logical channel related to the cellular connection (334) are then transmitted via the same cellular bearer (330).
摘要翻译：本申请涉及用于D2D单信道（308）和蜂窝上行链路单信道（324）的移动终端无线电堆栈。 D2D连接是通过蜂窝无线电频谱在第一移动终端和第二移动终端之间形成的直接连接。 D2D连接是本地通信链路，通常可以在短距离内使用。因为D2D连接可能相当迅速地丢失，所以将D2D通信与传统蜂窝通信的切换（例如，承载建立）相关联。演进的通用移动电信系统陆地无线电接入网（E-UTRAN））可能不会及时发生以同步多个移动终端。结果，移动终端之间的多个协议数据单元可能丢失。解决的问题在于，响应于切换指示，移动终端然后可以使与正在进行切换的D2D承载相关联的PDCP实体（318）与诸如RLC实体之类的附加RLC实体相关联与蜂窝承载相关联，例如演进分组系统EPS承载（334）。经由与D2D连接（314）相关的逻辑信道接收的SDU和经由与蜂窝连接（334）有关的逻辑信道接收的SDU然后经由相同的蜂窝承载（330）发送。

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