Base Station Common Control Information Transmission in Coexistence Systems
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Solution Overview
Problem
In wireless communication systems, there is a need for a method to transmit and receive common control information effectively when legacy and new communication systems coexist, as they may have different channel structures and signaling schemes, requiring a defined transmission/reception scheme for seamless interworking and replacement.
Innovation Solution
A system and method where a base station determines if a wireless communication system is a coexistence system, and if so, indicates the position and size of a resource allocation zone for common control information through a first information element in a downlink subframe, allowing mobile stations to decode and acquire necessary information for decoding common control information specific to both systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If legacy and new communication systems coexist with different channel structures and signaling schemes, then system versatility and adaptability are improved, but system complexity and difficulty of coordination increase
Solution Approach 1:
The patent segments the downlink subframe into distinct regions: a first region for legacy system common control information and a second region for new system common control information. This segmentation allows each system to operate with its own structured format while coexisting in the same frame structure, thereby managing complexity through organized division of resources.
Solution Approach 2:
The patent creates a universal frame structure that can accommodate both legacy and new communication systems simultaneously. The downlink subframe is designed to carry information for both systems using different information elements, making the system multi-functional and adaptable to multiple communication standards without requiring separate infrastructure.
2Productivity
If common control information is transmitted for both legacy and new systems in the same downlink subframe, then information transmission efficiency is improved, but decoding complexity for mobile stations increases
Solution Approach 1:
The patent divides the downlink subframe into separate information elements: first information elements for legacy system common control information and second information elements for new system common control information. Mobile stations can selectively decode only the information elements relevant to their system type, reducing decoding complexity while maintaining efficient information transmission for both systems.
3Adaptability or versatility
If resource allocation zones for common control information are dynamically adjusted, then system adaptability to different scenarios is improved, but signaling overhead and coordination requirements increase
Solution Approach 1:
The patent allocates specific regions within the downlink subframe for common control information of both legacy and new systems in advance. The position and size of these regions are determined beforehand based on system configuration, allowing dynamic adaptation to different scenarios without requiring extensive real-time signaling coordination, thus reducing signaling overhead.
Data Source
AI summary
A method and apparatus for transmitting common control information by a base station in a wireless communication system are provided. The base station determines whether a first system and a second system different from the first system coexist in a wireless communication system. When the wireless communication system is a coexistence system, the base station indicates information for coexistence of the first system and the second system, position and size information of a resource allocation zone where common control information for the second system can be transmitted, and information necessary for decoding of the resource allocation zone, through a first information element in a downlink subframe where resources are occupied for the first system. The base station transmits the common control information of the second system in the resource allocation zone where the common control information can be transmitted.