Base-Station Schedule Sharing for Multi-User Uplinks
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in multi-user communication due to interference between base stations and wireless terminals, particularly in environments where direct communication between base stations is not possible, leading to frame collisions and increased resource consumption.
Innovation Solution
A communication apparatus and method that enables base stations to share multi-user communication schedules and resource information with each other and their subordinate terminals, using frames that can be received by both the local and remote base stations, and wireless terminals, thereby reducing frame collisions and resource overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If base stations transmit frames independently without coordination, then each base station can operate autonomously, but frame collisions occur and resource efficiency decreases
Solution Approach 1:
The patent introduces a frame structure that acts as an intermediary carrier for schedule information. Base stations transmit their schedules through this standardized frame format, which can be received by both local and remote base stations. This intermediary frame structure enables indirect coordination without requiring direct base station-to-base station communication channels.
Solution Approach 2:
The patent implements schedule information copying where base stations transmit copies of their transmission schedules to remote base stations through the standardized frame. Remote base stations receive these copied schedule information and use them to avoid frame collisions, enabling coordinated operation without direct communication between base stations.
2Reliability
If base stations coordinate transmission schedules, then frame collisions are reduced, but communication overhead increases
Solution Approach 1:
The patent designs a universal frame structure that serves multiple functions simultaneously: it carries data traffic, transmits schedule information, and enables both local and remote base station reception. This multi-functionality reduces the need for separate coordination channels, thereby minimizing communication overhead while maintaining reliable collision avoidance.
Solution Approach 2:
The patent changes the parameter of frame destination addressing to enable multi-destination reception. By configuring destination addresses that include both local and remote base stations, the same frame can be efficiently received by multiple recipients without requiring additional frame transmissions, thus reducing overhead.
3Reliability
If direct communication between base stations is implemented, then schedule coordination is possible, but system complexity increases
Solution Approach 1:
The patent uses the standardized frame structure as an intermediary that eliminates the need for direct base station communication channels. Schedule information is transmitted through this intermediary frame that can be received by remote base stations via wireless terminals, avoiding the complexity of establishing direct inter-base-station communication infrastructure.
Solution Approach 2:
The patent replaces the mechanical/direct communication system between base stations with an indirect information transmission mechanism using standardized frames. Instead of requiring direct physical or dedicated communication links between base stations, the system uses wireless frame transmission that can be received by multiple parties, simplifying the overall system architecture.
4Productivity
If multi-user communication is performed simultaneously, then communication speed increases, but interference between terminals increases
Solution Approach 1:
The patent implements preliminary action by transmitting schedule information before actual data transmission. Base stations send their transmission schedules in advance through the standardized frame, allowing remote base stations to prepare and avoid collisions. This preliminary schedule exchange enables simultaneous multi-user communication while maintaining low interference through advance coordination.
Data Source
AI summary
A communication apparatus and a communication apparatus that perform wireless communication by a multi-user method are provided. The communication apparatus includes a communication section configured to transmit and receive a wireless signal and a control section configured to control operation as a base station, and transmits a frame that includes schedule information relating to scheduled communication of the own station and can be received by a different wireless terminal and receives schedule information relating to scheduled information of a different base station. The scheduled communication includes multi-user communication of an uplink, and the schedule information includes information relating to a transmission schedule of a frame for inducing multi-user communication of an uplink.