communication.puml

@startuml
participant SP order 1
participant ISMG1 order 2
participant ISMG2 order 3
participant SMC order 4

note over SP, ISMG1
  基于 CMPP 协议通信
end note

note over ISMG1, ISMG2
  基于 CMPP 协议通信
end note

note over ISMG2, SMC
  基于 SMPP 协议通信
end note

SP -> ISMG1: CMPP_CONNECT 建立连接
activate ISMG1
ISMG1 --> SP: CMPP_CONNECT_RESP 连接响应
deactivate ISMG1

...

SP -> ISMG1: CMPP_ACTIVE_TEST 心跳请求
activate ISMG1
ISMG1 --> SP: CMPP_ACTIVE_TEST_RESP 心跳响应
deactivate ISMG1

...


SP -> ISMG1: CMPP_SUBMIT 提交短信（并存储在 ISMG1）
activate ISMG1
ISMG1 --> SP: CMPP_SUBMIT_RESP 接收到短信
deactivate ISMG1

ISMG1 -> ISMG2: CMPP_FWD  (MT 前转)
activate ISMG2
ISMG2 --> ISMG1: CMPP_FWD_RESP (MT 前转响应)
deactivate ISMG2

ISMG2 -> SMC: 发送短信
activate SMC
SMC --> ISMG2: 发送短信响应
deactivate SMC

...手机接收到短信后...
SMC -> ISMG2: 短信下行回调
activate ISMG2
ISMG2 --> SMC: 短信上行回调响应
deactivate ISMG2

ISMG2 -> ISMG1: CMPP_FWD (MT 时的状态报告)
activate ISMG1
ISMG1 --> ISMG2: CMPP_FWD_RESP (MT 时的状态报告响应)
deactivate ISMG1


ISMG1 -> SP: CMPP_DELIVER （状态报告）
activate SP
SP --> ISMG1: CMPP_DELIVER_RESP （状态报告响应）
deactivate SP

...

SP -> ISMG1: CMPP_TERMINATE 拆除连接
activate ISMG1
ISMG1 --> SP: CMPP_TERMINATE_RESP 拆除响应
deactivate ISMG1


@enduml