What are the differences and connections between patent pool and patent pool?

The patent alliance can be understood as follows: cross-licensing.

My patent will involve a technical point of your patent, so that we can trade fairly at the negotiating table, * * * have each other's technology and reach cooperation.

Patent pool: For example, Apple mobile phones form a patent pool. From integrated circuits to appearance patents, to practicality, to invention, they are all technical points and patents. It is a combination boxing in the strategic layout of intellectual property rights, and it has a strategic height in attacking the market. For example, Huawei's mobile phone is also the same.