Mobile Terminal Feedback Control Information Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE-A systems, the increased amount and types of feedback control information require efficient transmission methods on uplink channels to maintain high bandwidth utilization and peak data rates, especially with wider frequency bands and advanced techniques like coordinated multi-point transmission/reception and MIMO.
Innovation Solution
A mobile terminal apparatus and radio communication method that efficiently transmit feedback control information by mapping it to suitable radio resources based on the number of component carriers, presence of uplink data, and the number of bits, using techniques such as M-ary data modulation, multi-code transmission, multi-carrier transmission, and orthogonal multiplexing with cyclic shift or block spreading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If feedback control information is transmitted for each component carrier in LTE-A systems, then the amount of feedback information increases to support wider bandwidths and advanced techniques, but the overhead and complexity of uplink transmission increases
Solution Approach 1:
The patent combines multiple feedback control information bits for multiple component carriers into a single uplink transmission resource. Instead of transmitting separate feedback for each component carrier, the system merges the feedback information and transmits it collectively, reducing the number of separate transmissions and simplifying the uplink transmission structure.
Solution Approach 2:
The patent creates a universal feedback transmission mechanism that can handle variable numbers of component carriers and different feedback information types through a single standardized process. The mapping method adapts to different scenarios (different numbers of component carriers, different uplink data conditions) using the same fundamental approach, reducing the need for multiple specialized transmission paths.
2Quantity of substance
If more radio resources are allocated for feedback control information, then larger information amounts can be transmitted, but bandwidth utilization decreases and overhead increases
Solution Approach 1:
The patent implements dynamic resource allocation for feedback control information based on the actual number of component carriers and uplink data conditions. The mapping method adapts the amount of radio resources used for feedback transmission to match the information capacity requirements, avoiding fixed over-provisioning of resources and maintaining high bandwidth utilization while accommodating variable feedback loads.
Solution Approach 2:
The system changes the mapping parameters (number of bits, resource allocation) based on the number of component carriers and uplink data presence. By dynamically adjusting these parameters, the system optimizes the balance between feedback information capacity and bandwidth utilization, allocating more resources only when necessary.
3Productivity
If feedback control information is transmitted concurrently with uplink data, then transmission efficiency improves, but the complexity of resource mapping and multiplexing increases
Solution Approach 1:
The patent segments the uplink transmission into distinct regions: one for user data and another for feedback control information. This segmentation allows concurrent transmission while simplifying the mapping process, as each segment has its own dedicated resources and processing rules, reducing the overall mapping complexity despite the concurrent transmission.
Solution Approach 2:
The patent introduces a standardized mapping mechanism that acts as an intermediary between the feedback information generation and the physical transmission. This intermediary layer handles the complexity of resource allocation and multiplexing, providing a uniform interface that simplifies the overall system architecture while enabling efficient concurrent transmission.
Data Source
AI summary
To provide a mobile terminal apparatus and radio communication method for enabling feedback control information to be efficiently transmitted on uplink channels, a radio communication method of the invention is characterized by having in a mobile terminal apparatus the steps of receiving a signal for each of a plurality of component carriers from a radio base station apparatus, generating feedback control information for each component carrier from the signal, mapping the feedback control information for each component carrier to suitable radio resources based on the number of component carriers, the presence or absence of uplink transmission data, and the number of bits of control information to transmit as feedback, and transmitting an uplink transmission signal mapped to the radio resources.