UE Random Access Msg3 Optimization for NB-IoT Small Packet Transmission
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Solution Overview
Problem
Existing wireless communication systems, such as NB-IoT and eMTC, face challenges in efficiently transmitting small uplink packets without establishing an RRC connection, leading to unnecessary signaling overheads and power consumption.
Innovation Solution
A method in User Equipment (UE) that allows for the transmission of uplink small packets without an RRC connection by generating a first radio signal with a bit block that lacks fields for RRC connection request cause information, enabling direct data transmission through a random access process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs transmit uplink small packets through traditional Msg3 in random access process, then RRC connection establishment is ensured, but signaling overheads and power consumption increase
Solution Approach 1:
The patent extracts and removes the RRC connection establishment fields (cause information fields) from the Msg3 message structure. By taking out these unnecessary signaling elements for small packet transmissions, the message size is reduced, signaling overhead is minimized, and power consumption is lowered while still maintaining the essential random access functionality.
Solution Approach 2:
The patent applies partial action by implementing a simplified Msg3 format that includes only the necessary fields for small packet transmission (identifier, data block) while omitting the RRC connection cause information fields. This partial message structure is sufficient for the specific use case of small packet transmissions, avoiding the excessive signaling of full RRC connection establishment.
2Adaptability or versatility
If UEs transmit uplink small packets through traditional Msg3 in random access process, then connection management is maintained, but spectrum efficiency deteriorates
Solution Approach 1:
The patent extracts and removes the RRC connection cause information fields from Msg3, reducing the message size and minimizing signaling overhead. This extraction of unnecessary fields improves spectrum efficiency by allowing more efficient utilization of radio resources for actual data transmission.
Solution Approach 2:
The patent changes the parameter structure of Msg3 by modifying the message format to exclude RRC connection establishment fields. This parameter change (removing cause information fields) optimizes the message for small packet transmissions, improving spectrum efficiency while maintaining adaptability through the preserved identifier and data block fields.
3Reliability
If Msg3 includes RRC connection cause information fields, then connection establishment is supported, but message size increases
Solution Approach 1:
The patent extracts and removes the RRC connection cause information fields from the Msg3 message structure. By taking out these fields that are unnecessary for small packet transmissions, the message size is significantly reduced while still maintaining the essential functionality through the preserved identifier and data block fields.
Solution Approach 2:
The patent segments the Msg3 message into essential components (identifier, data block) and non-essential components (RRC connection cause information). By separating and removing the non-essential segment for small packet transmissions, the message size is optimized while the essential segmentation remains intact for maintaining connection management functionality.
Data Source
AI summary
The disclosure provides a method and a device in a User Equipment (UE) and a base station supporting random access. The UE first transmits a first radio signal, and then receives a second radio signal. A first bit block is used for generating the first radio signal, the first bit block includes a positive integer number of bits, the first bit block carries a first identifier and a first data block, the first bit block lacks a field used for indicating RRC connection request cause information, a field used for indicating RRC connection reestablishment request cause information or a field used for indicating RRC connection resume request cause information compared with a Msg3, the first data block includes a positive integer number of higher-layer bits, the second radio signal carries a second identifier. The first identifier is equal to the second identifier.