Base Station Scheduler Grouping Primary Secondary Users
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Solution Overview
Problem
Conventional MIMO communication systems do not effectively utilize wireless resources as they fail to consider the service characteristics of users when scheduling, leading to inefficient allocation of resources and unsatisfied service demands, particularly for users requiring small data sizes with strict delay tolerance.
Innovation Solution
A base station equipped with a scheduler that groups users based on service characteristics such as data size, data rate, and delay tolerance, using superposition coding and beamforming to generate a single transmission data stream that includes primary and secondary data, allowing for efficient allocation of resources and simultaneous support of multiple users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single beam is allocated to support a single user in conventional MIMO systems, then the system can maintain simple beam management, but the wireless resources are not utilized effectively and users with strict delay tolerance cannot be served efficiently
Solution Approach 1:
The patent segments users into primary users and secondary users based on service characteristics. Primary users receive guaranteed resources while secondary users utilize remaining resources, allowing the system to serve multiple user types efficiently without overwhelming beam management complexity
Solution Approach 2:
The patent introduces a new dimension of user classification (primary/secondary) beyond traditional single-user beam allocation. This dimensional change enables multi-user support within a single beam by differentiating service requirements and allocating resources accordingly
2Reliability
If conventional MIMO systems allocate beams without considering service characteristics, then the scheduling process is simple, but users with strict delay tolerance experience poor service quality and resources are wasted
Solution Approach 1:
The patent applies local quality by providing different service levels to different user groups. Primary users with strict delay tolerance receive prioritized resource allocation and guaranteed quality of service, while secondary users with flexible requirements utilize remaining resources, ensuring each user group receives appropriate service quality
Solution Approach 2:
The patent changes the scheduling parameter from simple round-robin or random allocation to service-characteristic-based allocation. By considering parameters such as delay tolerance and data size, the system dynamically adjusts resource allocation to meet diverse service requirements while maintaining manageable scheduling complexity
3Productivity
If the base station supports multiple users using SDMA with M antennas, then the data rate increases, but the system can only support a maximum of M users simultaneously with a single beam per user
Solution Approach 1:
The patent makes the single beam universal by enabling it to serve both primary and secondary users simultaneously through superposition coding. This multi-functionality allows the beam to handle different service types (delay-sensitive and delay-tolerant) within the same time-frequency resource, increasing system versatility without requiring M beams for M users
Data Source
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AI summary
A communication system for supporting a primary user and a secondary user is provided. A base station of a communication system, includes a scheduler to group at least one primary user and at least one secondary user corresponding to each of the at least one primary user according to characteristics of services desired by users, a superposition coding unit to perform superposition coding for primary data associated with the at least one primary user and secondary data associated with the at least one secondary user to generate a transmission data stream, and a beamformer to perform beamforming for the transmission data stream.