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发明申请
US20100254356A1 Timing Alignment in an LTE System 有权
LTE系统中的定时对准

Timing Alignment in an LTE System
摘要：
A method (500) for use in a user terminal (120, 130) in a cellular communications system (100). According to the method, the user terminal applies a first timing advance value (505) to its transmissions to a controlling node (140), and the user terminal (120, 130) requests communication with the controlling node (140) in a contention based procedure by transmitting an access request (MSG 1), in response (515) to which the controlling node transmits an initiation message (MSG 2) along with (520) a second timing advance value. According to the method (500), the user terminal (120, 130) uses (530) the first timing advance value if the user terminal loses the contention based procedure, i.e. if the controlling node subsequently continues the initiated communication with said other user terminal.
摘要（中）：

一种用于蜂窝通信系统（100）中的用户终端（120,130）中的方法（500）。 根据该方法，用户终端向控制节点（140）向其传输应用第一定时提前值（505），并且用户终端（120,130）在基于争用的基础上请求与控制节点（140）的通信 响应（515）发送与控制节点发送启动消息（MSG 2）一起的接入请求（MSG 1）以及（520）第二定时提前值的过程。 根据方法（500），用户终端（120,130）如果用户终端丢失基于竞争的过程（即，如果控制节点随后继续与所述其他用户终端的发起的通信），则使用（530）第一定时提前值 。

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