Dynamic Time Window Configuration for PRACH Transmissions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems face challenges in configuring a uniform time window length for multiple PRACH transmissions, which can lead to performance bottlenecks and inadequate coverage, especially in systems like NR, due to varying requirements for physical random access channels.
Innovation Solution
A method and apparatus that dynamically adjust the length of a time window based on the number of physical random access channel transmissions, using a radio network temporary identifier (RNTI) and configuration information to optimize the time window length, allowing for flexible and efficient PRACH transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a uniformly configured time window length is used for multiple PRACH transmissions, then the configuration is simple, but it cannot satisfy configuration requirements for multiple PRACH transmissions and may lengthen the time window unnecessarily
Solution Approach 1:
The patent makes the time window length dynamic by associating different time window lengths with different numbers of PRACH transmissions. The network device configures multiple time window lengths corresponding to different quantities of PRACH transmissions, allowing the terminal to select the appropriate time window length based on the actual number of transmissions required, thus achieving adaptability without excessive complexity.
Solution Approach 2:
The patent changes the parameter of time window length based on the number of PRACH transmissions. By configuring multiple time window length parameters corresponding to different transmission quantities, the system allows parameter selection that matches the actual transmission needs, resolving the contradiction between uniform configuration simplicity and adaptive configuration effectiveness.
2Reliability
If the time window length is increased to satisfy the requirement for the number of valid moments of the physical random access channel, then the configuration requirement is met, but the uniformly configured time window length is further lengthened
Solution Approach 1:
The patent applies local quality by assigning different time window lengths to different scenarios based on the number of PRACH transmissions. Instead of using a uniformly long time window for all cases, the system configures shorter time windows for scenarios requiring fewer transmissions and longer time windows for scenarios requiring more transmissions, thus meeting reliability requirements without unnecessary lengthening.
3Stability of the object's composition
If a uniformly configured time window length is used, then the configuration is consistent, but it affects the performance of the multiple PRACH transmissions and makes PRACH transmission a bottleneck in coverage
Solution Approach 1:
The patent introduces dynamics into the previously static uniform configuration by making the time window length variable based on the number of PRACH transmissions. This dynamic configuration maintains consistency through structured parameter association while improving transmission performance by matching time window length to actual transmission needs, thereby eliminating the coverage bottleneck.
Data Source
Figure 1~3
Figure 4~7
Figure 8~9
AI summary
A method applied at a node for wireless communication and an apparatus are provided. One method includes: transmitting a first plurality of random access preambles by using a first spatial filter, wherein a first plurality of physical random access channel occasions are used for transmission of the first plurality of random access preambles; monitoring a first control signaling during a first time window in response to the first plurality of random access preambles; transmitting a second plurality of random access preambles by using a second spatial filter, wherein a second plurality of physical random access channel occasions are used for transmission of the second plurality of random access preambles; and monitoring a second control signaling during a second time window in response to the second plurality of random access preambles.