Page 182 - ITU-T Focus Group IMT-2020 Deliverables

3 ITU-T Focus Group IMT-2020 Deliverables

The key component of this application is a smart routing technology that enables an efficient interest
forwarding based on a keyword table. Network node does compose/decompose of basic message of ICN
(Interest, Data). There are four patterns depending on whether request should be decomposed or not, and
whether response should be composed or not. Figure 9.2-2 shows these patterns. Which pattern should be
used is either decided by node policy or automatically decided by what is requested in request message. As
for decompose of request (B1, B2), a request message (Interest) is split into different messages depending
on what is requested in request message and location of each content. In case of no decompose of request
(A1, A2), a request message is just copied as it is and multiple copies are sent to multiple producers. For both
cases a requester only has to send one request message, but for the former case (B1, B2), content volume of
response messages is expected to be reduced. As for compose of response (A2, B2), a response messages
(Data) are merged into one message, where multiple contents are packed in it. In case of no compose of
response (A1, B1), each response message is sent to a requester separately. For the former case (A2, B2), the
number of response messages are expected to be reduced. In addition, if there is duplication between
content in each response, an intermediate node can remove it and reduce content volume.

Figure 9.2-2 – Compose /decompose patterns of the smart routing

Abbreviations and Acronyms
• ICN(Information Centric Network)
• IoT(Internet of Things)

References
[9.2-1] 5G!Pagoda: https://5g-pagoda.aalto.fi/

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