Multi-Beam MIMO CQI Signaling With Joint Beam Parameter Encoding

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Solution Overview

Problem

Multi-beam transmission systems in UMTS face increased signaling overhead when transmitting multiple data streams, restricting flexibility and transport block sizes due to the need for additional signaling to indicate different transmission parameters and resources.

Innovation Solution

Jointly encoding transmission resource and parameter information, allowing for a range of transport block sizes without increasing signaling overhead by using a set of values related by a similar factor or multiple, and optimizing code rates to reduce the number of channelization codes that need to be signaled.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If signaling information for multiple data streams is transmitted separately, then each stream can be controlled independently, but signaling overhead increases and data transmission capacity decreases

Engineering Contradiction:

Improveindependent stream controlVSAvoidsignaling overhead

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent combines signaling for multiple data streams into a single signaling message. Instead of separately signaling transport block sizes, modulation schemes, and code rates for each beam, the invention uses one unified signaling mechanism that jointly indicates parameters for both primary and secondary beams, thereby reducing signaling overhead while maintaining independent control capability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The signaling message is designed to serve multiple functions simultaneously: it indicates transport block sizes for both beams, modulation schemes for each beam, and code rate information, all within a single signaling structure. This multi-functional approach eliminates the need for separate signaling for each parameter set

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Loss of information

If transport block sizes are restricted to reduce signaling overhead, then fewer signaling bits are needed, but flexibility for transmitting data at required rates is reduced

Engineering Contradiction:

Improvesignaling overheadVSAvoidtransport block size flexibility

Core Design Contradiction:

Loss of informationVSAdaptability or versatility

Solution Approach 1:

The invention changes the parameter representation by using a unified transport block size indication that applies to both beams, rather than separate indications. The system allows flexible transport block sizes by interpreting the single signaling value differently for each beam based on their respective channel conditions and requirements, thereby maintaining flexibility without increasing signaling overhead

Inventive Principle:

Principle #35Parameter changes

3Loss of information

If symmetric code allocation is used to reduce signaling overhead, then the number of codes on both beams is equal, but the range of transport block sizes that can be transmitted is restricted

Engineering Contradiction:

Improvesignaling overheadVSAvoidtransport block size range

Core Design Contradiction:

Loss of informationVSAdaptability or versatility

Solution Approach 1:

The patent introduces asymmetry in code allocation while maintaining symmetric signaling. The single signaling value for transport block size is interpreted differently for each beam, allowing asymmetric actual code allocations based on channel conditions. This enables the system to achieve asymmetric adaptability without requiring asymmetric signaling, thus reducing overhead while expanding the transport block size range

Inventive Principle:

Principle #4Asymmetry

4Adaptability or versatility

If additional signaling bits are used to indicate more transport block size options, then flexibility increases, but signaling overhead increases and data transmission capacity decreases

Engineering Contradiction:

Improvetransport block size optionsVSAvoiddata transmission capacity

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The system uses the existing signaling structure to serve multiple purposes simultaneously. The single transport block size indication serves both beams, and by leveraging the relationship between primary and secondary beam parameters, the system derives additional flexibility without requiring additional signaling bits. The signaling message essentially serves itself to provide enhanced adaptability

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS8331878B2Efficient CQI signaling MIMO systems with variable numbers of beams

Publication Date: 2012.12.11 KONINKLIJKE PHILIPS NV

AI summary

The present invention relates to a multi-beam transmission apparatus and system, and to a method for operating a multi-beam transmission system, wherein a first transmission resource information and a second transmission resource information are determined for respective first and second transmission beam, and wherein a first transmission parameter information and a second transmission parameter information are determined for the respective first and second transmission beams. The first and second transmission resource information and the first and second transmission parameter information are jointly encoded into a joint signal; and the joint signal is transmitted via the first and second transmission beams from a first station to a second station.