Method and apparatus for performing efficient layer 2 function in mobile communication system
地域：
Suwon-si
摘要
The present disclosure relates to a communication technique for converging IoT technology with a 5G communication system for supporting a higher data transfer rate beyond a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart or connected cars, health care, digital education, retail business, and services associated with security and safety) on the basis of 5G communication technology and IoT-related technology. Disclosed are a method and an apparatus for configuring an efficient hierarchical layer 2 architecture and main functions thereof in a next-generation mobile communication system.
說明書
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That is, the MAC PDU format for the case of configuring segmentation and the MAC PDU format for the case of not configuring segmentation may differ as follows. Various MAC PDU formats are possible and, according to an embodiment of the present invention, the MAC sub-header is included per PDCP PDU and includes the LCID field, the length field, and the S1 field for the corresponding PDCP PDU.
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- If segmentation is configured, a predetermined field of the MAC sub-header may be used to indicate the presence/absence of a segmentation header. For example, the MAC sub-header may include an n-bit LCID field, an m-bit length field, and 1-bit S1 field (first format).
- If segmentation is not configured, a predetermined field (S1 field) of the MAC header may be used for a different purpose, e.g., for expanding the field indicating the size of the MAC SDU (or PDCP PDU) related to the MAC header. For example, the MAC sub-header may include an n-bit LCID field and an (m+1)-bit length field (second format).
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