Transmission Resource Allocation for Multi-Layer Wireless Systems
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Solution Overview
Problem
Conventional resource allocation methods for wireless communication systems fail to optimize the allocation of transmission resources between control information and user data when using multi-antenna transmission techniques, leading to inefficient use of resources and increased overhead.
Innovation Solution
A method for allocating transmission resources across multiple codewords and transmission layers by estimating the spectral efficiency based on the data payloads of user data, allowing for dynamic adjustment of resources for control signaling to match the channel quality, thereby optimizing the use of resources and reducing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional resource allocation methods are used for single layer transmission, then the allocation is simple to implement, but the resource allocation efficiency deteriorates when MIMO techniques are utilized to transmit data on multiple layers simultaneously
Solution Approach 1:
The patent segments the resource allocation process by separately determining the number of coded symbols for control information on each transmission layer. Instead of treating all layers uniformly, the method divides the allocation into layer-specific portions, where each layer's control information resources are calculated independently based on its spectral efficiency and code rate requirements.
Solution Approach 2:
The patent implements dynamic resource allocation that adapts to varying channel conditions across different transmission layers. The number of coded symbols allocated to control information on each layer is dynamically adjusted based on the spectral efficiency estimates and code rates specific to each layer, allowing the system to optimize resource distribution in real-time according to actual channel quality.
2Productivity
If MIMO transmission techniques are used to increase data throughput, then the data rate increases, but the complexity of managing radio channels increases greatly
Solution Approach 1:
The patent simplifies channel management complexity by segmenting the control information transmission across multiple layers. Each layer independently carries control information with its own resource allocation calculations, allowing the receiver to process control information layer by layer rather than managing a single complex control channel across all layers simultaneously.
Solution Approach 2:
The patent applies local quality optimization by tailoring the resource allocation for control information to the specific spectral efficiency and channel conditions of each transmission layer. Each layer receives control information resources matched to its local channel quality, rather than using a uniform allocation approach that would be overly complex or suboptimal.
3Productivity
If control signaling and user data are multiplexed on PUSCH, then transmission resources are shared efficiently, but the overhead for transmitting control signaling increases
Solution Approach 1:
The patent changes the parameters used for resource allocation by basing the number of coded symbols for control information on spectral efficiency estimates and layer-specific code rates rather than using fixed or conservative allocations. This parameter-based approach reduces control signaling overhead by precisely matching resources to actual transmission requirements.
Solution Approach 2:
The patent implements dynamic adjustment of control signaling resources based on real-time spectral efficiency measurements and code rate selections for each layer. This dynamic approach allows the system to reduce control overhead when channel conditions are good (higher spectral efficiency) while maintaining adequate resources when conditions deteriorate, optimizing the balance between resource utilization and overhead.
Data Source
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AI summary
A method for wirelessly transmitting data using a plurality of transmission layers includes estimating a number of vector symbols (124) to be allocated to transmission of user data codewords (122) during a subframe and determining a number of bits in a plurality of user data codewords (122) to be transmitted during the subframe. The method also includes calculating a number of control vector symbols (124) to allocate to control information based at least in part on the estimated number of vector symbols ( 124) and the determined number of bits. Additionally, the method includes mapping control codewords ( 122) to the calculated number of control vector symbols (124) and transmitting vector symbols (124) carrying the user data codewords (122) and the control codewords ( 120) over the plurality of transmission layers during the subframe.