Random Access Response Merging via Common RNTI
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Solution Overview
Problem
In future network systems, when a terminal device sends multiple random access signals to a network device, the network device may respond with multiple random access responses, each scrambled with different RNTIs, making it difficult for the terminal device to detect the correct response and establish a communication link.
Innovation Solution
The network device receives random access signals on multiple predetermined resources, determines a single RNTI for these signals, and transmits a single random access response scrambled with this RNTI, allowing the terminal device to detect the response and establish a communication link by using the specified RNTI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network device returns multiple random access responses for multiple random access signals, then each signal can be acknowledged individually, but the terminal device cannot detect the correct response due to multiple different RNTIs
Solution Approach 1:
The patent merges multiple random access responses into a single response by combining the resources (time, frequency, code) of multiple random access signals. The network device determines a common RNTI based on the relationship between multiple predetermined resources and uses this single RNTI to scramble the random access response, allowing the terminal device to detect the response reliably without dealing with multiple different RNTIs.
Solution Approach 2:
The patent creates a universal RNTI that serves multiple functions - it is used to scramble the random access response for multiple different random access signals. This universal RNTI is determined by the relationship between multiple predetermined resources (time resources, frequency resources, code resources), enabling a single response to acknowledge multiple signals.
2Loss of information
If multiple random access responses are transmitted with different RNTIs, then each response corresponds to its specific signal, but the terminal device cannot determine which response belongs to it
Solution Approach 1:
The patent combines the identification function into a single universal RNTI that represents multiple random access signals. Instead of having separate RNTIs for each signal, the network device determines one common RNTI based on the resource relationships, and this single identifier is used to scramble the response that acknowledges multiple signals, eliminating the information loss problem.
3Ease of operation
If the network device uses a single RNTI for multiple random access responses, then the terminal device can detect the response easily, but multiple responses would be identical and indistinguishable
Solution Approach 1:
The patent merges multiple responses into one by combining their resource allocations. The network device determines a common RNTI and allocates a single set of time-frequency-code resources for the response, effectively combining what would have been multiple separate responses into one unified response that acknowledges multiple random access signals.
Data Source
AI summary
A method and an apparatus for random access are provided. The method includes: a network device receives a plurality of random access signals on a plurality of predetermined resources, wherein one predetermined resource of the plurality of predetermined resources corresponds to one random access signal of the plurality of random access signals; the network device determines a radio network temporary identifier (RNTI) according to the plurality of predetermined resources; and the network device transmits a random access response of the plurality of random access signals scrambled through the RNTI.