Hello Bertrand
The link Tammy posted is the right direction but it is not the complete answer. To link from one AOLAP workspace to another AOLAP workspace requires the use of RRI and OpenDocument. AOLAP is an RRI sender, but not an RRI receiver.
First use RSBBS to define an RRI link on the query being used by the source AOLAP workspace. This RRI link will be to a URL sender.
The URL sender then contains the OpenDocument URL link to the destination AOLAP workspace. You find this URL in the BI Launchpad by navigating the folders to the AOLAP workspace, right-click on it and choose "Document Link". Copy the displayed URL into the definition of the RRI URL Sender.
You can also pass context from the source AOLAP workspace as a value to a prompt variable in the destination AOLAP workspace.
The two screenshots below show this.... but the second screenshot is most relevent. This shows a parameter being hard-coded but you can also pass context dynamically.
Regards