ISAC Baseband Beam Management for Sensing and Communication
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Solution Overview
Problem
Existing wireless communication systems face challenges in integrating sensing and communication functions, leading to inefficient use of spectrum resources, separate procedures that impact communication throughput, and inability to sense targets without communication capabilities, with beam alignment issues due to multipath and occlusion.
Innovation Solution
A method and apparatus for wireless baseband processing that incorporates an ISAC beam management module and a sensing function module, enabling the transmission of wide and narrow sensing-communication beams, and separating communication and sensing data through a novel frame structure and beamforming techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dual-carrier device is used with separate carriers for communication and sensing, then sensing function is achieved, but spectrum resources are occupied and device complexity increases
Solution Approach 1:
The patent combines communication and sensing functions into a single carrier and base station. The base station transmits both communication signals and sensing signals (such as radar signals) on the same carrier frequency, eliminating the need for separate dual-carrier devices. This merging approach achieves sensing capability while reducing device complexity and spectrum resource occupation.
2Adaptability or versatility
If communication transmission is turned off during sensing slots, then sensing procedure is enabled, but communication throughput is reduced
Solution Approach 1:
The patent enables continuous transmission of communication signals while performing sensing operations. Instead of turning off communication transmission during sensing slots, the base station maintains continuous communication signal transmission and extracts sensing information from the transmitted signals and their reflections. This approach enables sensing procedure while maintaining communication throughput.
3Measurement precision
If reference signal access beam is used for rough direction sensing, then user access sensing is achieved, but other sensing targets without communication capabilities cannot be detected
Solution Approach 1:
The patent implements a universal sensing mechanism that can detect both communicating users and non-communicating targets. The base station transmits dedicated sensing signals (such as radar signals) that can reflect off any target regardless of communication capability. The sensing function module processes these reflections to detect targets without communication capabilities, while still maintaining user access sensing through reference signals.
4Reliability
If beam training is performed for communication, then beam alignment is achieved, but sensing accuracy is reduced due to multipath and occlusion
Solution Approach 1:
The patent separates beam training for communication and sensing into independent processes. The beam management module handles communication beam training using reference signals between base station and users, while the sensing function module independently processes sensing signals and reflections for accurate target detection. This segmentation allows communication beam alignment to proceed without being degraded by multipath and occlusion issues affecting sensing accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables integrated sensing and communication, improving communication performance by reducing beam training, enhancing mobility management, and achieving high-gain communication with fine sensing capabilities.
Implementation Method 1
an ISAC beam management component, configured to perform a beam management procedure, adjusting a beam shape and direction by adjusting parameters of a basic unit of a multi-antenna array phase through a beamforming technology
Implementation Method 2
decoding sensing information from a reflected sensing echo through the SF module
Data Source
AI summary
A method for wireless baseband processing for realizing integrated sensing and communication (ISAC) includes: designing based on a wireless baseband processing procedure of a base station, adding an ISAC beam management module in a transmitter, and adding a sensing function (SF) module to a receiver; sending a wide sensing-communication transmission beam through the ISAC beam management module, and decoding sensing information from a reflected sensing echo through the SF module, the sensing information including a target location; narrowing a beam, aiming at the target location, and sending a narrow sensing-communication transmission beam through the ISAC beam management module based on the sensing information; and designing a manner for separating an uplink communication beam and echo data of a sensing-communication transmission beam received by the base station, the sensing-communication transmission beam including the wide sensing-communication transmission beam and the narrow sensing-communication transmission beam.