Uplink Physical Resource Block Indexing via Reference Point Offset
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Solution Overview
Problem
Current 5G NR standards lack a common index for uplink physical resource blocks (PRBs), making it difficult for user equipment (UE) to synchronize and determine resource allocation, as the location and allocation of PRBs in the frequency domain are not uniquely defined.
Innovation Solution
A method is introduced where a scheduling entity broadcasts a synchronization signal block (SSB) with a reference point offset, allowing the UE to determine a common reference point for PRB indexing, and an uplink indexing indication is used to decide whether to use this reference point or a different one for uplink resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a common index for uplink physical resource blocks is not defined, then the system maintains flexibility in resource allocation, but user equipment cannot synchronize and determine resource allocation uniquely
Solution Approach 1:
The patent introduces a reference point offset parameter that shifts the PRB indexing reference from the traditional center frequency to a configurable location. This parameter change enables unique resource allocation identification while maintaining system flexibility through configurable offset values.
Solution Approach 2:
The patent introduces an intermediary reference point (offset from center frequency) that mediates between the center frequency and actual PRB allocations. This intermediary enables unique resource identification without requiring complete redefinition of the resource allocation system.
2Ease of operation
If PRB indexing is based on center frequency like LTE, then synchronization is simplified, but 5G NR flexibility in carrier frequency allocation is lost
Solution Approach 1:
The patent makes the PRB indexing reference dynamic by introducing a configurable offset from the center frequency. Instead of a fixed center-frequency-based indexing, the reference point can be dynamically adjusted to accommodate different carrier allocations while maintaining synchronization benefits.
Solution Approach 2:
The patent applies local quality by allowing different offset values for different carriers or scenarios. Each carrier can have its own reference point offset configured, enabling localized optimization for specific frequency allocations while maintaining overall system consistency.
3Measurement precision
If multiple reference points are used for uplink resource allocation, then resource allocation precision is improved, but device complexity increases
Solution Approach 1:
The patent performs preliminary action by configuring the reference point offset in advance through system information or RRC signaling. This pre-configuration eliminates the need for complex real-time reference point calculations, reducing operational complexity while maintaining allocation precision.
Data Source
AI summary
Aspects and techniques relate to scheduling resources for uplink transmissions in wireless communication systems. In some examples, an allocation of resources for uplink may be based on a common reference resource (e.g., a reference physical resource block, PRB) also used for allocation of resources for downlink In other examples, allocation of resources for uplink may be based on a different reference resource. A scheduler may further provide an indication whether the same, common reference resource is used, or a different reference resource. A scheduler may further indicate a different reference resource as needed. Other aspects, embodiments, and features are also claimed and described.