IPSP支持BLE设备之间进行IPv6数据包交换；
- 允许支持IPSP的设备彼此发现和通信；
- 关于IPv6数据包基于BLE的传输详见文档RFC7668【IPv6 over BLE】
主体框架如下：
IPSS,GATT,ATT仅用于服务发现，GAP用于设备发现和连接建立；
IPSP定义了两个角色：Node role and Router Role；
Router role用于设备路由IPv6数据包；Node role仅能originate or consume IPv6应用数据包；
A Node Role shall support GAP peripheral role;
A Router Role shall support GAP Central role;
A device may support both Node role and Router role;
Node Role Requirements:
GATT Server Role , IPSS(Service)
The IP support service is used during service discovery to determine support for the IP Support
Profile’s Node role.
The service UUID shall be set to « Internet Protocol Support Service» [ 0x1820 ]
L2CAP Requirements:
In this profile, only the LE Connection Oriented Channels feature with the LE Credit Based Flow
Control Mode shall be used.
建立L2CAP 连接：（建立链路层连接之后）
- LE Credit Based Connection Request Packet格式为：
IPSP中指定LE Credit Based Connection Request Packet的LE_PSM字段设置为LE_PSM_IPSP(0x0023)；
LE Credit Based Flow Control Mode参见L2CAP Spec 10小节
MTU size shall be 1280 octets or higher.