ACK/NAK Bundling and Multiplexing Selection in TDD Wireless Systems

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Solution Overview

Problem

In wireless time division duplex networks, existing technologies face challenges in determining the optimal use of ACK/NAK bundling or ACK/NAK multiplexing for communication with user equipment (UE) based on UE location and speed, leading to inefficiencies in data throughput and control signaling overhead.

Innovation Solution

A base station processing unit determines the use of either ACK/NAK bundling or ACK/NAK multiplexing based on predetermined criteria such as UE location, speed, frequency location change rate, and Channel Quality Information, selecting ACK/NAK bundling for cell edge or low-speed UEs and ACK/NAK multiplexing for high-speed UEs to optimize communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If ACK/NAK multiplexing is used, then data throughput is improved, but control signaling overhead increases

Engineering Contradiction:
Improvedata throughputVSAvoidcontrol signaling overhead
Core Design Contradiction:
ProductivityVSQuantity of substance

Solution Approach 1:

The system dynamically switches between ACK/NAK bundling and ACK/NAK multiplexing based on real-time UE conditions (location, speed, channel quality). The base station evaluates predetermined criteria and adapts the acknowledgement mechanism accordingly, making the system flexible rather than static

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The invention changes the operational parameters of the acknowledgement mechanism by selecting between bundling and multiplexing modes based on UE characteristics such as location, speed, and channel quality information, optimizing performance for different operating conditions

Inventive Principle:
Principle #35Parameter changes

2Quantity of substance

If ACK/NAK bundling is used, then control signaling overhead is reduced, but data throughput deteriorates

Engineering Contradiction:
Improvecontrol signaling overheadVSAvoiddata throughput
Core Design Contradiction:
Quantity of substanceVSProductivity

Solution Approach 1:

The system dynamically switches between ACK/NAK bundling and ACK/NAK multiplexing based on real-time UE conditions (location, speed, channel quality). The base station evaluates predetermined criteria and adapts the acknowledgement mechanism accordingly, making the system flexible rather than static

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The invention changes the operational parameters of the acknowledgement mechanism by selecting between bundling and multiplexing modes based on UE characteristics such as location, speed, and channel quality information, optimizing performance for different operating conditions

Inventive Principle:
Principle #35Parameter changes

3Device complexity

If a fixed acknowledgement mechanism is used for all UEs, then device complexity is reduced, but network performance deteriorates

Engineering Contradiction:
Improveconfiguration complexityVSAvoidnetwork performance
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The system applies different acknowledgement mechanisms (bundling or multiplexing) to different UEs based on their specific characteristics such as location, speed, and channel quality, rather than applying a uniform approach to all UEs

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The system dynamically switches between ACK/NAK bundling and ACK/NAK multiplexing based on real-time UE conditions (location, speed, channel quality). The base station evaluates predetermined criteria and adapts the acknowledgement mechanism accordingly, making the system flexible rather than static

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS8842586B2Method and apparatus for ACK/NAK transmission in a time division duplex wireless system
Publication Date: 2014.09.23 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
  • US8842586B2 patent drawing
  • US8842586B2 patent drawing
  • US8842586B2 patent drawing

AI summary

A base station of a wireless time division duplex network which communicates with a UE having a network interface unit. The base station having a processing unit which determines to use either ACK/NAK bundling or ACK/NAK multiplexing to communicate with the UE through the network interface unit based on predetermined criteria. A method of a base station of a wireless time division duplex network which communicates with a UE to choose either ACK/NAK bundling or ACK/NAK multiplexing having the steps of determining with a processing unit of the base station to use either ACK/NAK bundling or ACK/NAK multiplexing to communicate with the UE through a network interface unit of the base station based on predetermined criteria. There is the step of communicating with the UE through the network interface unit using either ACK/NAK bundling or ACK/NAK multiplexing based on the predetermined criteria.