Uplink Control Information Multiplexing on PUSCH for Multi-Carrier Systems
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Solution Overview
Problem
In conventional single carrier wireless communication systems, there is a lack of a detailed method for configuring uplink carriers for transmitting uplink control information, particularly in multiple carrier systems where multiple carriers are aggregated to extend bandwidth.
Innovation Solution
A method and apparatus for transmitting uplink control information by reserving channel selection resources, receiving scheduling information for uplink data channels, determining the appropriate uplink data channel for multiplexing the control information, and multiplexing it in resource element regions, allowing the control information to be transmitted on a Physical Uplink Shared Channel (PUSCH).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If uplink control information is transmitted through a dedicated uplink control channel in a single carrier system, then the transmission is simple and straightforward, but in a multiple carrier system there is no detailed method for configuring uplink carriers for transmitting control information
Solution Approach 1:
The patent applies universality by enabling uplink data channels (PUSCH) to serve dual functions: transmitting both uplink data and uplink control information (ACK/NACK, CQI, SR). This multi-functionality resolves the contradiction by adapting the system to multiple carriers without requiring separate dedicated control channels for each carrier, thus maintaining simplicity while achieving versatility.
Solution Approach 2:
The patent merges the transmission of uplink control information with uplink data transmission by multiplexing control information onto the PUSCH. This combining approach eliminates the need for separate control channel configurations in multi-carrier systems, reducing configuration complexity while maintaining full control information transmission capability across multiple carriers.
2Productivity
If uplink control information is transmitted on a dedicated control channel, then the transmission method is straightforward, but it requires separate channel configuration and resources in multiple carrier systems
Solution Approach 1:
The PUSCH is designed to perform multiple functions simultaneously - carrying both uplink data payloads and uplink control information. This universality improves productivity by utilizing existing data channel resources for control information transmission, eliminating the need for separate dedicated control channel configurations and reducing overall system complexity.
Solution Approach 2:
The system allows the uplink data channel (PUSCH) to serve itself by incorporating control information transmission capabilities within its existing structure. The PUSCH resources are self-sufficient to handle both data and control information without requiring additional dedicated control channel resources, thereby improving transmission efficiency while minimizing configuration complexity.
3Productivity
If multiple uplink data channels are scheduled in the same time domain resources, then resource utilization is improved, but determining which channel to multiplex control information on becomes more complex
Solution Approach 1:
The patent applies preliminary action by establishing clear prioritization rules and selection criteria before the actual multiplexing decision is made. The terminal device determines which PUSCH to use for control information based on pre-defined criteria such as carrier priority, channel quality, or scheduling timing, making the operation straightforward even when multiple channels are available in the same time resources.
Solution Approach 2:
The patent applies local quality by allowing different selection criteria or priorities for different uplink carriers or different control information types. Each carrier or control information type can have its own specific rules for determining the multiplexing channel, making the overall system easier to operate by localizing the decision-making logic rather than requiring a single complex global rule.
Data Source
AI summary
The present invention relates to a method for transmitting the uplink control information in the wireless communication system supporting the multi-carriers according to one embodiment of the present invention, which comprises the steps of: reserving one or more channel selection resources for transmitting the uplink control information; receiving scheduling information for one or more uplink data channels to be transmitted on the same time domain resources as the reserved channel selection resources; determining an uplink data channel in which the uplink control information is multiplexed, from one or more uplink data channels; and multiplexing and transmitting the uplink control information in each of one or more resource element regions corresponding to each of one or more channel selection resources which are reserved to transmit the uplink control information, on the selected one uplink data channel.