gnb-cu:gnb central unit,乙個邏輯節點,承載gnb的rrc、sdap、pdcp協議,或en-gnb的rrc和pdcp協議。
gnb-du:gnb distributed unit ,乙個邏輯節點,承載gnb或en-gnb的rlc、mac和phy。
gnb-cu-cp:gnb-cu-control plane,乙個邏輯節點,承載gnb或en-gnb的rrc以及pdcp控制面。
gnb-cu-up:gnb-cu-user plane,乙個邏輯節點,承載en-gnb的pdcp使用者面,或gnb的pdcp使用者面和sdap。
1. e1ap服務
e1ap提供gnb-cu-cp節點與gnb-cu-up節點之間的信令服務。服務分為兩類:
2. e1ap一般過程分類
(1)e1ap一般過程按是否有響應,可分為兩類:
一般過程
發起訊息
成功響應
失敗響應
gnb-cu-up e1 setup
gnb-cu-up e1 setup request
gnb-cu-up e1 setup response
gnb-cu-up e1 setup failure
gnb-cu-cp e1 setup
gnb-cu-cp e1 setup request
gnb-cu-cp e1 setup response
gnb-cu-cp e1 setup failure
gnb-cu-up configuration update
gnb-cu-up configuration update
gnb-cu-up configuration update acknowledge
gnb-cu-up configuration update failure
gnb-cu-cp configuration update
gnb-cu-cp configuration update
gnb-cu-cp configuration update acknowledge
gnb-cu-cp configuration update failure
e1 release
e1 release request
e1 release response
reset
reset
reset acknowledge
bearer context setup
bearer context setup request
bearer context setup response
bearer context setup failure
bearer context modification (gnb-cu-cp initiated)
bearer context modification request
bearer context modification response
bearer context modification failure
bearer context modification required (gnb-cu-up initiated)
bearer context modification required
bearer context modification confirm
bearer context release (gnb-cu-cp initiated)
bearer context release command
bearer context release complete
過程訊息
作用error indication
error indication
bearer context release request (gnb-cu-up initiated)
bearer context release request
bearer context inactivity notification
bearer context inactivity notification
dl data notification
dl data notification
ul data notification
ul data notification
data usage report
data usage report
gnb-cu-up counter check
gnb-cu-up counter check
gnb-cu-up status indication
gnb-cu-up status indication
mr-dc data usage report
mr-dc data usage report
(2)e1ap一般過程按功能劃分,可分為兩類: 功能
過程介面管理
gnb-cu-up e1 setup
gnb-cu-cp e1 setup
gnb-cu-up configuration update
gnb-cu-cp configuration update
reset
error indication
e1 release
gnb-cu-up status indication
承載上下文管理
bearer context setup
bearer context modification (gnb-cu-cp initiated)
bearer context modification required (gnb-cu-up initiated)
bearer context release (gnb-cu-cp initiated)
bearer context release request (gnb-cu-up initiated)
bearer context inactivity notification
dl data notification
ul data notification
gnb-cu-up counter check
gnb-cu-up counter check
data usage report
mr-dc data usage report
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