Wireless Resource Element Signaling for CoMP and MU MIMO
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Solution Overview
Problem
In wireless OFDM communication systems, particularly in CoMP and MU MIMO modes, there is a need for efficiently signaling and managing resource elements to support advanced transmission modes without explicit configuration by higher layers, especially when additional reference symbols are required for assisting transmission points or multiple users.
Innovation Solution
A method for signaling particular types of resource elements in a wireless communication system, involving receiving and transmitting messages that provide information about allocated resource elements and indications of specific types within these elements, allowing for accurate decoding and mapping of data modulation symbols, even in complex transmission scenarios like CoMP and MU MIMO.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional reference symbols are allocated for CoMP and MU MIMO modes, then the system can support advanced transmission modes, but the overhead of signaling and resource allocation increases
Solution Approach 1:
The patent applies universality by designing a signaling mechanism that serves multiple functions: it indicates resource element allocations for data transmission while simultaneously supporting advanced transmission modes like CoMP and MU MIMO. The same indication structure is used to convey both basic resource allocation and the presence of additional reference symbols, eliminating the need for separate signaling for different transmission modes.
Solution Approach 2:
The patent merges the signaling of resource element allocations with the indication of transmission mode requirements. Instead of separate signaling for resource allocation and for CoMP/MU MIMO support, the invention combines these into a unified indication mechanism where the resource element allocation pattern itself conveys information about the transmission mode being used.
2Measurement precision
If explicit configuration by higher layers is used for transmission mode details, then accurate resource allocation can be achieved, but the signaling overhead and complexity increase
Solution Approach 1:
The patent applies self-service by designing a system where the resource element allocation pattern itself provides the necessary information about transmission mode requirements. The UE can autonomously determine the transmission mode and resource allocation based on the received indication without requiring explicit higher-layer configuration, enabling the system to self-configure for CoMP and MU MIMO operations.
Solution Approach 2:
The patent changes the parameter representation by using the resource element allocation pattern as the carrier of transmission mode information. Instead of using separate configuration parameters for transmission mode and resource allocation, the invention encodes transmission mode information within the resource allocation pattern itself, allowing accurate resource allocation without additional signaling overhead.
3Device complexity
If resource elements are sub-divided into sets for allocation to users, then overhead of signaling is reduced, but the flexibility for advanced transmission modes is limited
Solution Approach 1:
The patent applies dynamics by designing a flexible resource element allocation mechanism that can adapt to different transmission modes. The indication structure allows dynamic switching between conventional and advanced transmission modes without requiring reconfiguration of the underlying resource division structure. The same subdivided resource sets can be dynamically allocated for different purposes depending on the transmission mode being used.
Data Source
AI summary
A wireless communication terminal including a transceiver coupled to a processor and corresponding methods are disclosed. The processor is configured to determine resource elements that carry data intended for the terminal from a set of allocated resource elements that carry data intended for the terminal excluding at least resource elements associated with a first set of one or more resource elements of a particular type that are shifted relative to a known reference signal pattern. The processor is also configured to decode the resource elements that carry the data intended for the terminal based on the resource elements that carry the data intended for the terminal.