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标题: 开机附着后要立即释放RRC连接吗?  [查看完整版帖子] [打印本页]

时间:  2011-7-9 14:44
作者: babyzhong888     标题: 开机附着后要立即释放RRC连接吗?

请教各位大虾,开机附着后要立即释放RRC连接吗?
看有人说因为LTE中UE是“永远在线”的,不会立即释放RRC,而是等UE一直无数据传输才释放RRC。
求正解?其他Service Request流程是否一样呢?
时间:  2011-7-9 23:24
作者: CQI2_0     标题: 不会

确实要等到无数据传输才释放,一般会有一个定时器。

有一种情况比较特殊,会立即释放,IDLE态时,移动导致所在跟踪区变化,这种情况会在新的跟踪区注册成功之后就释放了,以维持原来的IDLE态状态。

LTE里面把UE的状态简化了,对于UE来说,就三种状态,关机、IDLE(可基于业务接入或者基于Paging接入等等之后进行业务),连接(可直接进行业务)。
对于MME来说,对应有注册连接态,注册非连接态,非注册态。

这个“永远在线”,对3G和GSM不了解,不好评论。。。
时间:  2011-7-13 15:11
作者: hycl5410

2楼正解。
所谓“永远在线”是ESM状态体现,LTE下UE从开机就建立PDN connection(对应2G3G可以理解为PDP),UE拿到PGW分配到的IP,并且一直保持着default bearer。
而2G3G一般开机只进行attach,不建立PDP。
时间:  2011-7-14 10:18
作者: TDLTE-Rail     标题: 回复 2# 的帖子

请教一下,控制RRC连接释放的定时器是哪一个?
时间:  2011-7-14 18:41
作者: illidan

这个是基站内部的东东,由厂家算法确定。定时器到了,基站发RRC release,释放连接。
时间:  2011-8-4 20:32
作者: pxl888

<font size=\"3\"><span style=\"font-family: \"Times New Roman\'; FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\" lang=EN-US>不会一直在线的,UE</span><span style=\"font-family: 宋体; font-size: 10.5pt; mso-bidi-font-size: 10.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: en-us; mso-fareast-language: zh-cn; mso-bidi-language: ar-sa; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'; mso-bidi-font-family: \'Times New Roman\'\">刚开机时,先进行物理下行同步,搜索测量进行小区选择,选择到一个</span><span style=\"font-family: \"Times New Roman\'; FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\" lang=EN-US>suitable</span><span style=\"font-family: 宋体; font-size: 10.5pt; mso-bidi-font-size: 10.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: en-us; mso-fareast-language: zh-cn; mso-bidi-language: ar-sa; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'; mso-bidi-font-family: \'Times New Roman\'\">或者</span><span style=\"font-family: \"Times New Roman\'; FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\" lang=EN-US>acceptable</span><span style=\"font-family: 宋体; font-size: 10.5pt; mso-bidi-font-size: 10.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: en-us; mso-fareast-language: zh-cn; mso-bidi-language: ar-sa; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'; mso-bidi-font-family: \'Times New Roman\'\">小区后,驻留并进行附着过程,等到没有数据传输的时候进入idle状态。<span style=\"font-family: \"Times New Roman\'; FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\" lang=EN-US>UE</span><span style=\"font-family: 宋体; font-size: 10.5pt; mso-bidi-font-size: 10.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: en-us; mso-fareast-language: zh-cn; mso-bidi-language: ar-sa; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'; mso-bidi-font-family: \'Times New Roman\'\">在</span><span style=\"font-family: \"Times New Roman\'; FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\" lang=EN-US>IDLE</span><span style=\"font-family: 宋体; font-size: 10.5pt; mso-bidi-font-size: 10.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: en-us; mso-fareast-language: zh-cn; mso-bidi-language: ar-sa; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'; mso-bidi-font-family: \'Times New Roman\'\">模式下,需要发送业务数据时,发起</span><span style=\"font-family: \"Times New Roman\'; FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\" lang=EN-US>service request</span><span style=\"font-family: 宋体; font-size: 10.5pt; mso-bidi-font-size: 10.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: en-us; mso-fareast-language: zh-cn; mso-bidi-language: ar-sa; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'; mso-bidi-font-family: \'Times New Roman\'\">过程,此过程跟开机附着类似,要发起随机接入重新建立RRC连接。</span></span></font>




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