Random Access Sub-Channel Beam Alignment for Wireless Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, the beam alignment process for random access in wireless communication systems is time-consuming and inefficient, particularly for mobile terminals far from the base station, leading to increased communication latency and reduced service coverage due to the need for precise alignment of transmission and reception beams.
Innovation Solution
The method involves dividing the RA channel into multiple RA sub-channels with different beam forming characteristics, allowing mobile terminals to select the appropriate sub-channel based on their position and channel state, thereby minimizing beam alignment time and expanding service coverage by using a combination of transmission and reception beam forming patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If beam forming is used to increase transmission distance and reduce interference, then service coverage is expanded and interference is reduced, but beam alignment process becomes time-consuming and communication latency increases
Solution Approach 1:
The RA channel is segmented into multiple RA sub-channels, each associated with different beam forming patterns. This segmentation allows mobile terminals to directly access the appropriate sub-channel based on their position and channel state, eliminating the need for sequential beam alignment testing and significantly reducing access time while maintaining expanded service coverage.
Solution Approach 2:
Beam forming patterns are pre-configured and associated with specific RA sub-channels before communication begins. Mobile terminals can determine their appropriate sub-channel based on preliminary information about their position and channel state, performing the beam alignment action in advance rather than during the random access process, thus reducing communication latency.
2Measurement precision
If beam alignment process is performed to align transmission and reception beams, then communication accuracy is improved, but communication latency increases
Solution Approach 1:
Mobile terminals autonomously determine their position and channel state, and independently select the appropriate RA sub-channel based on this self-assessment. This self-service approach eliminates the need for iterative beam alignment signaling between the base station and mobile terminal, maintaining high alignment accuracy while significantly reducing the time required for random access.
Solution Approach 2:
The system changes the parameter of beam forming pattern selection from a dynamic, iterative process to a static, pre-determined selection based on the mobile terminal's position and channel state. By changing how beam alignment is achieved (from active scanning to passive selection), the system maintains precision while reducing latency.
3Reliability
If multiple beam forming patterns are tested for beam alignment, then optimal channel is determined, but the process becomes inefficient and time-consuming
Solution Approach 1:
The RA channel is divided into multiple sub-channels, each corresponding to different beam forming patterns. This segmentation allows the system to maintain multiple channel optimization options simultaneously available, rather than testing them sequentially, thereby improving random access efficiency while preserving channel optimization reliability.
Solution Approach 2:
Each RA sub-channel is designed to handle multiple functions: it serves as both a random access channel and a beam alignment channel simultaneously. This multi-functionality allows mobile terminals to perform both random access and beam alignment in a single process, improving efficiency while maintaining reliable channel optimization.
Data Source
AI summary
A method and a Base Station (BS) of transmitting information for Random Access (RA) by a base station in a wireless communication system are provided. The BS generates RA information for beam alignment between the base station and each of a plurality of mobile terminals based on a number of reception beam forming patterns of the base station used for each of one or more RA channels and broadcasts the RA information to the plurality of mobile terminals. The RA information comprises information related to the number of reception beam forming patterns of the base station used for each of the one or more RA channels.