Two-Step Random Access Frequency Hopping for Uplink Reliability
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Solution Overview
Problem
Existing wireless communication systems face challenges in reducing latency and signaling overhead in initial access and data transfer processes, particularly in two-step random access procedures, which can be improved through enhanced frequency hopping techniques.
Innovation Solution
Implementing frequency hopping configurations and patterns for two-step random access channels, allowing UEs to transmit payloads across a frequency hopping space, segmenting data into blocks, and encoding them into codewords for improved frequency diversity and reduced uplink interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is implemented for two-step random access, then frequency diversity and reduced uplink interference are achieved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent changes the frequency parameter by implementing frequency hopping across multiple resource units. The UE transmits different codewords on different frequency resources within the frequency hopping space, transforming a single-frequency transmission into a multi-frequency transmission to achieve frequency diversity and reduce interference.
Solution Approach 2:
The patent segments the payload into multiple blocks and encodes them into separate codewords. Each codeword is then mapped to different resource units within the frequency hopping space. This segmentation allows the system to distribute information across multiple frequency resources, improving reliability through diversity.
2Reliability
If payload is segmented into blocks and encoded into multiple codewords for frequency hopping transmission, then frequency diversity is improved, but processing complexity increases
Solution Approach 1:
The payload is divided into multiple blocks, and each block is independently encoded into a codeword. This segmentation enables the system to transmit multiple codewords across different frequency resources, achieving frequency diversity while maintaining manageable processing complexity through structured block processing.
Solution Approach 2:
The patent introduces a frequency dimension by mapping codewords to multiple resource units across a frequency hopping space. Instead of transmitting all codewords on a single frequency, the system distributes them across multiple frequency resources, adding a frequency diversity dimension to the transmission.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, configuration information for a two-step random access procedure. The UE may determine a frequency hopping space for transmitting a payload of a two-step random access channel of the two-step random access procedure. The UE may encode the payload into one or more codewords. The UE may map the one or more codewords to a plurality of resource units of the frequency hopping space. The UE may transmit the one or more codewords to the base station on the plurality of resource units of the frequency hopping space. Numerous other aspects are provided.