WTRU Location-Assisted Initial Access with Separate SRSp Resources
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately verifying the geographic location of a Wireless Transmit/Receive Unit (WTRU) during initial access to a wireless network, particularly in 5G New Radio (NR) networks, due to overlapping resource allocations for initial access and positioning transmissions, leading to collisions and inefficiencies.
Innovation Solution
The WTRU receives configuration information for separate resource sets for initial access and sounding reference signal (SRSp) transmissions, transmits a random access preamble and SRSp, and processes feedback to optimize uplink transmissions, thereby reducing collisions and enhancing location verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate resource sets are allocated for initial access and positioning transmissions, then collision between transmissions is reduced, but device complexity increases
Solution Approach 1:
The patent divides wireless resources into separate resource sets: one for initial access transmissions and another for positioning transmissions (SRSp). This segmentation prevents collisions between different transmission types while maintaining manageable complexity through structured resource allocation.
Solution Approach 2:
The patent implements dynamic resource selection where the WTRU can adaptively choose between different resource sets based on network conditions and transmission requirements. The gNB provides configuration information that enables flexible resource allocation, allowing the system to optimize performance while managing complexity through conditional logic rather than rigid fixed assignments.
2Measurement precision
If location verification is performed during initial access, then positioning accuracy is improved, but access efficiency deteriorates due to resource conflicts
Solution Approach 1:
By separating initial access resources from positioning resources into distinct resource sets, the patent eliminates resource conflicts that would otherwise occur when both functions share the same time-frequency resources. This allows location verification to proceed with high accuracy without delaying or interfering with the initial access process.
Solution Approach 2:
The patent configures positioning resources (SRSp) in advance as part of the initial access setup. The gNB provides configuration information including SRSp resource allocations before the WTRU begins transmissions, enabling positioning measurements to be performed concurrently with initial access without causing resource conflicts.
Data Source
AI summary
The disclosure pertains to methods and apparatus for network verification of a Wireless Transmit/Receive Unit (WTRU)'s geographic location upon initial access of the WTRU to the network. For example, the WTRU is configured to receive configuration information indicating a first set of resources for initial access transmissions and a second set of resources for sounding reference signal for positioning (SRSp) transmissions; transmit a first initial access transmission comprising a random access preamble associated with the first set of resources and first information indicating one or more resources from the second set of resources; transmit a first SRSp transmission using the one or more resources from the second set of resources; receive a second initial access transmission comprising second information indicating a first status for the first initial access transmission and a second status for the first SRSp transmission; and transmit, based on the second information, an uplink transmission.