PUCCH Resource Allocation for Extended ACK/NACK Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting multiple ACK/NACK information bits for multiple downlink data transmissions over physical uplink control channels, particularly in multi-carrier and TDD systems, where existing methods can lead to increased transmission power and peak-to-average power ratio, reducing coverage and accuracy.
Innovation Solution
The proposed solution extends ACK/NACK information transmission by allocating multiple PUCCH resources to user equipment, utilizing a channel selection scheme and modifying orthogonal spreading codes and cyclic shifts to accommodate increased bit sizes, allowing for efficient and accurate transmission of extended ACK/NACK information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple ACK/NACK information bits are transmitted using existing methods, then the capacity to feedback multiple downlink data transmissions is improved, but the transmission power and peak-to-average power ratio increase
Solution Approach 1:
The patent segments the transmission of multiple ACK/NACK bits by allocating multiple separate PUCCH resources (first PUCCH resource and second PUCCH resource) to different user equipments. Each PUCCH resource carries a subset of the total ACK/NACK information, allowing the feedback capacity to be distributed across multiple transmission channels rather than concentrating all bits in a single high-power transmission.
Solution Approach 2:
The patent introduces a new dimension for transmitting ACK/NACK information by utilizing multiple PUCCH resources simultaneously. Instead of increasing the bit capacity within a single PUCCH transmission (which would increase power), the system distributes ACK/NACK bits across multiple PUCCH resources in the time-frequency domain, effectively adding a dimensional aspect to the feedback mechanism.
2Quantity of substance
If multiple ACK/NACK information bits are transmitted using existing methods, then the capacity to feedback multiple downlink data transmissions is improved, but the coverage and accuracy decrease
Solution Approach 1:
The patent segments the ACK/NACK feedback across multiple PUCCH resources allocated to different user equipments. By distributing the transmission of multiple ACK/NACK bits across multiple separated PUCCH channels rather than a single channel, the system improves reliability through diversity - if one PUCCH transmission experiences poor channel conditions, other PUCCH resources may still successfully deliver their assigned ACK/NACK information.
Solution Approach 2:
The patent changes the transmission parameters by allocating multiple PUCCH resources with different time-frequency positions and orthogonal cover codes. This parameter diversification allows the system to transmit multiple ACK/NACK bits while maintaining better coverage and accuracy, as the distributed transmissions are less susceptible to fading and interference affecting a single transmission.
3Productivity
If multiple PUCCH resources are allocated to user equipment, then the multiplexing capacity and resource allocation efficiency are improved, but the device complexity increases
Solution Approach 1:
The patent implements a universal resource allocation mechanism where multiple PUCCH resources are allocated to user equipments based on their specific needs for ACK/NACK feedback. The base station maintains a pool of PUCCH resources that can be dynamically assigned to different user equipments, allowing the same resource pool to serve multiple purposes and multiple users, thereby improving multiplexing capacity without requiring dedicated resources for each possible scenario.
Solution Approach 2:
The patent employs preliminary action by pre-configuring multiple PUCCH resources and establishing allocation rules before actual ACK/NACK transmission occurs. The base station prepares the resource pool and determines allocation strategies in advance, which simplifies the real-time decision-making process and reduces operational complexity despite the increased multiplexing capacity.
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
The present invention relates to a wireless communication system; and more specially, to a method and apparatus for transmitting extended uplink acknowledgement information in a wireless communication system. A method for receiving uplink acknowledgement information from a base station according to one embodiment of the present invention comprises the steps of: allocating a plurality of uplink acknowledgement transmission resources to each of at least one terminal; and receiving, by one uplink sub-frame, uplink acknowledgement information from the at least one terminal through at least one of the plurality of uplink acknowledgement transmission resources, wherein each of the plurality of uplink acknowledgement transmission resources is allocated, differently from each other, with at least one of the following: resource block (RB), a first cyclic shift (CS), a second CS, a first orthogonal spreading code (OC) and a second OC.