Compact NR Control Information Format for Initial Access
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing control information formats, particularly during initial access procedures, leading to increased bit usage and resource allocation challenges.
Innovation Solution
A compact control information format is introduced, reducing the number of bits required for initial access procedures by utilizing formats designated for SI-RNTI, P-RNTI, RA-RNTI, and TC-RNTI, with a reduced cyclic redundancy check, specifically designed for 3GPP New Radio (NR) systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a standard control information format is used for initial access procedures, then reliability and compatibility are maintained, but the number of bits required increases and resource efficiency decreases
Solution Approach 1:
The control information format is segmented into distinct fields with specific functions. The format includes a message type field (2 bits) to identify the type of initial access procedure, a 5G-NR-ARFCN-UL field (10 bits) for uplink frequency identification, and a reserved field (10 bits) for future use. This segmentation allows the format to be compact while maintaining all necessary information for reliable initial access procedures.
Solution Approach 2:
The patent changes the parameter structure by using a compact 22-bit format instead of the standard longer format. Specific parameter assignments are optimized: the message type uses only 2 bits to cover four procedure types (SI-RNTI, P-RNTI, RA-RNTI, TC-RNTI), and the frequency field uses 10 bits to cover the required frequency range. These parameter changes reduce the total bit length while preserving functionality.
2Productivity
If control information is optimized for compactness, then resource efficiency improves, but the complexity of format designation and interpretation increases
Solution Approach 1:
The format includes a message type field that preliminarily identifies the type of initial access procedure before detailed interpretation. This allows the receiving device to quickly determine which interpretation rules to apply, reducing the overall complexity of format processing. The preliminary identification enables efficient resource allocation by allowing devices to prepare appropriate handling procedures in advance.
3Quantity of substance
If a reduced cyclic redundancy check is used, then bit usage is minimized and resource efficiency increases, but error detection capability may be compromised
Solution Approach 1:
The cyclic redundancy check (CRC) parameter is changed from the standard length to a reduced length of 9 bits. This parameter change reduces the total bit usage in the control information format while maintaining sufficient error detection capability for the compact format's intended applications in initial access procedures where the transmission distance and interference levels are typically controlled.
Data Source
AI summary
Aspects relate to formats for control information (e.g., downlink control information). A first control information format (e.g., a first downlink control information format) may be designated for a first initial access procedure associated with a system information radio network temporary identifier (SI-RNTI), a second initial access procedure associated with a paging network temporary identifier (P-RNTI), a third initial access procedure associated with a random access network temporary identifier (RA-RNTI), and a fourth initial access procedure associated with a temporary cell radio network temporary identifier (TC-RNTI). The first control information format may specify a smaller number of bits than a second control information format designated for connected mode procedures.