Dynamic Time Gap Configuration for Random Access Channel Procedures
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in the random access channel (RACH) procedure due to the use of pre-configured time gap values, which can lead to wasted PRACH occasions, as they do not consider the capabilities of the base station, resulting in suboptimal network performance.
Innovation Solution
The method involves determining a time gap value based on the base station's capability and transmitting this value to user equipment (UE), allowing the UE to validate PRACH occasions dynamically, thereby optimizing the use of available transmission opportunities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pre-configured time gap values are used for RACH procedure, then the configuration process is simple, but PRACH occasions are wasted and network performance deteriorates
Solution Approach 1:
The patent applies the dynamics principle by transitioning from static pre-configured time gap values to dynamic time gap determination based on actual base station capabilities. The UE dynamically adjusts the time gap value according to the base station's reported capability information, allowing the system to adapt to different operational conditions and maximize PRACH occasion utilization while maintaining configuration simplicity through automated capability-based adjustment.
2Device complexity
If pre-configured time gap values are used, then the system is easier to implement, but spectral efficiency is reduced and resources are wasted
Solution Approach 1:
The patent implements feedback by having the base station report its capability information to the UE, which then uses this feedback to determine the appropriate time gap value. This feedback mechanism allows the system to optimize spectral efficiency by aligning the time gap with actual base station capabilities while maintaining relatively simple implementation through standardized capability reporting procedures.
3Ease of operation
If fixed time gap values are used for all base stations, then the configuration is straightforward, but PRACH transmission opportunities are suboptimally utilized
Solution Approach 1:
The patent applies parameter changes by varying the time gap value based on base station capability characteristics. Instead of using a fixed time gap for all base stations, the system adjusts the time gap parameter according to the specific capabilities of each base station, thereby optimizing PRACH occasion utilization while maintaining operational ease through automated capability-based parameter adjustment.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive, from a base station, an indication of a time gap value associated with a random access channel (RACH) procedure, wherein the time gap value is based at least in part on a capability of the base station, determine whether a physical RACH (PRACH) occasion associated with the RACH procedure is valid based at least in part on receiving the indication of the time gap value associated with the RACH procedure, and selectively transmit, to the base station, a PRACH transmission in the PRACH occasion based at least in part on determining whether the PRACH occasion is valid. Numerous other aspects are provided.