Decentralized Multicell Cooperative Communications
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Solution Overview
Problem
Current multi-cell cooperative communication systems require a central controller and low latency links between base stations and the central controller, leading to high infrastructure costs and complexity, while also necessitating extensive information exchange and protocol definitions to coordinate scheduling and transmission parameters.
Innovation Solution
Implementing a decentralized system where each access point estimates and communicates channel information to all other access points within the cooperation cluster, allowing them to jointly serve terminals without a central controller, using homologous processing means to order service based on common criteria such as channel state and quality indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a central controller is used to coordinate multi-cell cooperative communications, then scheduling and transmission parameter coordination can be achieved, but infrastructure costs and system complexity increase significantly
Solution Approach 1:
The patent extracts the central controller from the multi-cell cooperative communication system, allowing base stations to operate independently using distributed algorithms. Each base station autonomously determines scheduling decisions and transmission parameters based on local channel state information, eliminating the need for centralized coordination infrastructure while maintaining coordination capabilities through standardized information exchange protocols.
Solution Approach 2:
The patent segments the centralized coordination function into distributed decision-making units at each base station. Instead of one central entity making all scheduling decisions, each base station independently processes local channel information and makes scheduling decisions, with coordination achieved through information sharing rather than centralized control.
2Speed
If low latency links are established between base stations and central controller, then real-time coordination is possible, but infrastructure costs increase
Solution Approach 1:
The patent enables base stations to serve themselves by making autonomous scheduling decisions based on locally available channel state information. Each base station independently determines which terminals to serve and what transmission parameters to use, without requiring real-time coordination links to a central controller, thereby eliminating the need for low latency infrastructure while maintaining coordination effectiveness.
3Productivity
If extensive information exchange is implemented for scheduling coordination, then optimal resource allocation is achieved, but protocol complexity and implementation difficulty increase
Solution Approach 1:
The patent applies local quality by having each base station make scheduling decisions based on local channel state information relevant to its own cell conditions. Instead of requiring all base stations to exchange and process all terminal information centrally, each base station uses locally available information to make optimal scheduling decisions, reducing protocol complexity while maintaining resource allocation efficiency.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
Method of multicell cooperative radio communications in which: the terminals estimate and communicate to all the access points of a cooperating group of access points information about the transmission channels between them and each access point of the group, the access points have homologous means of processing for ordering the servicing of the terminals and operate according to a determined criterion common to all the access points, the servicing of the terminals is performed jointly by the access points, in an order determined by said processing means, using transmission parameters on the basis of the information about the transmission channels which is transmitted by the terminals.